Actuator for camera and camera module including the same

Abstract

The actuator for a camera includes: a guide member, a base and a bearing portion stacked in a housing in the direction of the optical axis; a first drive unit that generates a driving force in a first axial direction and a second axial direction, the first drive unit including a plurality of magnets and a plurality of coils; and a second drive unit that generates a driving force in the direction of the optical axis and includes a magnet and a coil. The bearing portion, the base and the guide member can move together in the first axial direction, the bearing portion and the base can move together in the second axial direction, the bearing portion can move relative to the base in the direction of the optical axis, the magnet and the coil of the first drive unit are arranged to face each other in the direction of the optical axis, and the magnet and the coil of the second drive unit are arranged to face each other in the direction of the optical axis. The present application also discloses a camera module including the actuator.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2020-0173708 filed on December 11, 2020, in the Korean Intellectual Property Office, and Korean Patent Application No. 10-2021-0058067 filed on May 4, 2021, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein in their entirety by reference for all purposes. Technical Field

[0003] The following description relates to an actuator for a camera and a camera module including the actuator. Background Art

[0004] The camera module may be used in mobile communication terminals such as smart phones, tablet PCs, and notebook computers.

[0005] Furthermore, the camera module may be provided with an actuator having a focus adjustment function and an optical image stabilization function in order to generate a high-resolution image.

[0006] For example, the focus may be adjusted by moving the lens module in the optical axis (Z-axis) direction, or camera shake may be corrected by moving the lens module in a direction perpendicular to the optical axis (Z-axis).

[0007] In the case of an actuator, the lens module may be disposed in the carrier, and the focus may be adjusted by moving the carrier and the lens module together in the direction of the optical axis (Z axis). Then, the camera shake may be corrected by moving the lens module in the carrier in a direction perpendicular to the optical axis (Z axis). In this case, a magnet for optical image stabilization may be mounted on the lens module.

[0008] In such an actuator, since the lens module moves in the optical axis (Z axis) direction during focus adjustment, the relative positions (positions in the optical axis (Z axis) direction) of the camera shake compensation magnet and the camera shake compensation coil change.

[0009] When the relative positions (positions in the optical axis (Z-axis) direction) of the camera shake compensation magnet and the camera shake compensation coil change, there may be a problem in that it is difficult to accurately control the driving force (driving force in the direction perpendicular to the optical axis (Z-axis)) by the camera shake compensation magnet and the camera shake compensation coil.

[0010] The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Summary of the invention

[0011] The purpose of providing this summary is to introduce a selection of inventive concepts in a concise form, and these inventive concepts will be further described in the following detailed description. This summary is not intended to identify the key features or essential features of the subject matter claimed, nor is it intended to help determine the scope of the subject matter claimed.

[0012] In general, an actuator for a camera includes: a housing having an internal space; a guide member, a base, and a bearing portion stacked in the housing in the optical axis direction; a first drive unit configured to generate a driving force in a first axial direction perpendicular to the optical axis direction and in a second axial direction perpendicular to both the optical axis direction and the first axial direction, the first drive unit including a plurality of magnets and a plurality of coils; and a second drive unit configured to generate a driving force in the optical axis direction and including a magnet and a coil. The bearing portion, the base, and the guide member are configured to be movable together in the first axial direction, the bearing portion and the base are configured to be movable together in the second axial direction, the bearing portion is configured to be movable relative to the base in the optical axis direction, the plurality of magnets and the plurality of coils of the first drive unit are arranged to face each other in the optical axis direction, and the magnets and coils of the second drive unit are arranged to face each other in the optical axis direction.

[0013] The first driving unit may include a first sub-driving unit and a second sub-driving unit, the first sub-driving unit including a first magnet and a first coil facing the first magnet in the optical axis direction, the second sub-driving unit including a second magnet and a second coil facing the second magnet in the optical axis direction. The first magnet may be mounted on the guide member, and the second magnet may be mounted on the base.

[0014] The guide member may have a mounting groove in which the first magnet is disposed and an escape hole in which the second magnet is received.

[0015] A first substrate may be mounted on the housing. The first coil and the second coil may be disposed on one surface of the first substrate. On the other surface of the first substrate, a first yoke may be disposed at a position facing the first magnet, and a second yoke may be disposed at a position facing the second magnet.

[0016] A first ball member capable of rolling motion in a first axial direction may be disposed between the guide member and the housing, and a second ball member capable of rolling motion in a second axial direction may be disposed between the guide member and the base.

[0017] At least one of the surfaces of the guide member and the housing facing each other in the optical axis direction may include a first guide groove, in which the first ball member is arranged, and at least one of the surfaces of the guide member and the base facing each other in the optical axis direction may include a second guide groove, in which the second ball member is arranged.

[0018] The magnet of the second driving unit may be mounted on the carrying portion.

[0019] The magnet of the second driving unit may include at least two magnets, and the coil of the second driving unit may include at least two coils, the at least two magnets may be respectively arranged on the upper surface and the lower surface of the carrying part, and one coil of the at least two coils may be arranged on the first substrate, and the other coil may be arranged on the second substrate, and the second substrate is arranged at a position spaced apart from the first substrate in the optical axis direction.

[0020] The bearing portion may include a main body portion and a guide portion extending from one side of the main body portion in the optical axis direction, the base may include a placement portion facing the main body portion in the optical axis direction and a receiving portion extending from one side of the placement portion in the optical axis direction, and at least a portion of the guide portion is accommodated in an accommodating space in the receiving portion.

[0021] The third ball member may be disposed between the guide portion and the receiving portion, and a third guide groove in which the third ball member may be disposed may be respectively provided in surfaces of the guide portion and the receiving portion facing each other in a direction perpendicular to the optical axis direction.

[0022] The third ball member may include a first ball group contacting the third guide groove at four points and a second ball group contacting the third guide groove at three points.

[0023] The number of the plurality of balls belonging to the first ball group may be greater than the number of the plurality of balls belonging to the second ball group.

[0024] The first magnet may be disposed in the guide portion, the second magnet may be disposed in the receiving portion, and an attractive force may be generated between the first magnet and the second magnet in a direction perpendicular to the optical axis direction. The first magnet and the second magnet may be disposed closer to the first ball group than to the second ball group.

[0025] The camera actuator may further include an image sensor disposed on the carrier.

[0026] In another general aspect, a camera module includes a housing having an internal space; a lens module fixedly disposed in the internal space; a base and a carrying portion stacked in the housing in an optical axis direction; a first drive unit configured to generate a driving force in a first axial direction perpendicular to the optical axis direction and in a second axial direction perpendicular to both the optical axis direction and the first axial direction, the first drive unit comprising a plurality of magnets and a plurality of coils; and a second drive unit configured to generate a driving force in the optical axis direction and comprising a magnet and a coil, wherein an image sensor is disposed on the carrying portion, wherein the carrying portion and the base are configured to move together in the first axial direction and the second axial direction, wherein the carrying portion is configured to be movable in the optical axis direction relative to the base, wherein the plurality of magnets and the plurality of coils of the first drive unit are arranged to face each other in the optical axis direction, and wherein the magnets and the coils of the second drive unit are arranged to face each other in the optical axis direction.

[0027] The first driving unit may include: a first sub-driving unit including a first magnet and a first coil facing the first magnet in the optical axis direction; a second sub-driving unit including a second magnet and a second coil facing the second magnet in the optical axis direction; and a first position sensing unit facing the first magnet and the second magnet. The first magnet and the second magnet may be mounted on a base, at least one of the first coil and the second coil may include two coils, and the first position sensing unit may include at least three position sensors.

[0028] In another general aspect, an actuator for a camera includes: a carrier and a base stacked in a housing in an optical axis direction; a first drive unit configured to drive the base and the carrier in a first direction perpendicular to the optical axis direction and in a second direction perpendicular to the first direction and the optical axis direction; and a second drive unit configured to drive the carrier relative to the base in the optical axis direction, wherein one or more of the first drive unit and the second drive unit include a magnet facing the coil in the optical axis direction.

[0029] The actuator may further include a guide member, wherein movement of the guide member in the second direction may be restricted, wherein the base is stacked on the guide member, and wherein the first driving unit is configured to drive the guide member in the first direction to drive the base and the carrier in the first direction.

[0030] The camera module may include: an actuator for a camera; and an image sensor and a lens barrel, wherein one of the image sensor and the lens barrel is disposed on a carrier, and the other of the image sensor and the lens barrel is fixedly disposed on a housing, wherein the lens barrel may include one or more lenses disposed in an optical axis direction, and wherein the image sensor may be configured to receive light emitted from the lens barrel.

[0031] Other features and aspects will become apparent from the appended claims, the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view of a portable electronic device according to an example.

[0033] Figure 2 is a perspective view of a camera module according to an example.

[0034] Figure 3 is a schematic exploded perspective view of a camera module according to an example.

[0035] Figure 4 It is an exploded perspective view of the bearing part and the base.

[0036] Figure 5 It is a cross-sectional view taken along line II' in a state where the bearing portion and the base are assembled together.

[0037] Figure 6 It is a cross-sectional view taken along line II-II' in a state where the bearing portion and the base are assembled together.

[0038] Figure 7 It is an exploded perspective view of the base, guide member and housing.

[0039] Figure 8 It is a bottom perspective view of the base and a perspective view of the guide member.

[0040] Fig. 9 is a bottom perspective view of the guide member and a perspective view of the housing.

[0041] Fig.10 is a schematic exploded perspective view of an actuator for a camera according to another example.

[0042] Fig.11 is a schematic cross-sectional view of a camera module according to another example.

[0043] Fig.12 is a perspective view of a portable electronic device according to another example.

[0044] Fig.13 is a perspective view of a camera module according to another example.

[0045] Fig.14 is a schematic exploded perspective view of a camera module according to another example.

[0046] Fig.15 It is a stereogram of the lens and the lens barrel.

[0047] Fig.16 is a modified example of the lens barrel.

[0048] Fig.17 It is an exploded perspective view of the lens module, the first substrate, the housing, the guide member and the base.

[0049] Fig.18 It is an exploded perspective view of the first substrate, the housing, and the guide member.

[0050] Fig.19 It is an exploded perspective view of the guide member and the base.

[0051] Fig. 20 is a modified example of the guide member and the base.

[0052] Fig.21 is along Fig.17 A cross-sectional view taken along line III-III'.

[0053] Fig. 22 is along Fig.17 A screenshot taken at line IV-IV'.

[0054] Fig.23 It is an exploded perspective view of the bearing part and the base.

[0055] Fig.24A and Fig. 24B It is a bottom perspective view of the base.

[0056] Fig.25 is along Fig. 24B The cross-sectional view is taken along line V-V'.

[0057] Fig.26 It is a bottom stereogram of the bearing portion.

[0058] Fig. 27 is along Fig.23 A cross-sectional view taken along line VI-VI'.

[0059] Fig.28 is along Fig.23 A cross-sectional view taken along line VII-VII'.

[0060] Fig.29 is along Fig.23 A cross-sectional view taken along line VIII-VIII'.

[0061] Fig.30 is a modified example of the position of the third magnet.

[0062] Fig.31 is a modified example of the positions of the lens barrel and the image sensor.

[0063] Fig.32 is a schematic exploded perspective view of a camera module according to another example.

[0064] Fig.33 is an exploded perspective view of a housing and a base of a camera module according to another example.

[0065] Fig.34 is a schematic exploded perspective view of a camera module according to another example.

[0066] Fig.35 is a plan view of a first driving unit of a camera module according to another example.

[0067] Fig.36 and Fig.37 yes Fig.35 's modified example.

[0068] Throughout the drawings and detailed description, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0069] Hereinafter, although examples of the present disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0070] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described in this application. However, various changes, modifications and equivalents of the methods, devices and / or systems described in this application will be apparent after understanding the present disclosure. For example, the order of operations described in this application is merely an example, and except for operations that must occur in a specific order, it is not limited to the order set forth in this application, but can be changed, which will be apparent after obtaining an understanding of the present disclosure. In addition, for greater clarity and brevity, the description of features known in the art may be omitted.

[0071] The features described in this application can be implemented in different forms and should not be understood as being limited to the examples described in this application. Rather, the examples described in this application are provided only to illustrate some of the many possible ways to implement the methods, devices and / or systems described in this application that will be apparent after understanding this disclosure.

[0072] It should be noted that in the present application, the use of the word "may" with respect to an embodiment or example, for example, regarding what an embodiment or example may include or implement, means that there is at least one embodiment or example that includes or implements such features, and all embodiments and examples are not limited thereto.

[0073] Throughout the specification, when an element such as a layer, a region, or a substrate is described as being “on,” “connected to,” or “coupled to” another element, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present between the element and the other element. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, no other elements may be present between the element and the other element.

[0074] As used in this application, the term "and / or" includes any one of the associated listed items and any combination of any two or more items; similarly, "at least one" includes any one of the associated listed items and any combination of any two or more items.

[0075] Although the terms "first", "second" and "third" may be used in this application to describe various members, components, regions, layers or parts, these members, components, regions, layers or parts are not limited by these terms. More specifically, these terms are only used to distinguish one member, component, region, layer or part from another member, component, region, layer or part. Therefore, without departing from the teachings of the examples described in this application, the first member, first component, first region, first layer or first part mentioned in these examples may also be referred to as the second member, second component, second region, second layer or second part.

[0076] Spatially relative terms such as "above", "higher", "below", and "lower" may be used in this application for descriptive convenience to describe the relationship of one element relative to another element as shown in the accompanying drawings. In addition to covering the orientations depicted in the accompanying drawings, these spatially relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "higher" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" covers both orientations of "above" and "below". The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used in this application should be interpreted accordingly.

[0077] The terms used in this application are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the articles "a", "an" and "the" are intended to also include plural forms. The words "include", "comprise" and "have" indicate the presence of the features, numbers, operations, components, elements and / or their combinations, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or their combinations.

[0078] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described in the present application are not limited to the specific shapes shown in the drawings, but include variations in shapes that occur during manufacturing.

[0079] The features of the examples described in this application may be combined in various ways that will be apparent after gaining an understanding of the present disclosure. In addition, although the examples described in this application have various configurations, other configurations that will be apparent after understanding the present disclosure are also possible.

[0080] Examples described in this application provide an actuator for a camera that can improve optical image stabilization and a camera module including the actuator.

[0081] Figure 1 is a perspective view of a portable electronic device according to an example.

[0082] Reference Figure 1 The actuator for a camera and the camera modules 10, 20, 30, 40, and 50 including the actuator according to an example of the present disclosure may be mounted on a portable electronic device P. The portable electronic device P may be a portable electronic device such as a mobile communication terminal, a smart phone, or a tablet PC.

[0083] Figure 2 is a perspective view of a camera module according to an example, and Figure 3 is a schematic exploded perspective view of a camera module according to an example.

[0084] Reference Figure 2 and Figure 3 , a camera module 10 according to an example includes a lens module 1000 and an actuator 1 for a camera (hereinafter referred to as an 'actuator').

[0085] The lens module 1000 includes at least one lens L and a lens barrel 1100. The at least one lens L is disposed inside the lens barrel 1100. When a plurality of lenses L are provided, the plurality of lenses L are installed in the lens barrel 1100 along an optical axis (Z axis).

[0086] The lens module 1000 may further include a lens holder 1300 coupled to the lens barrel 1100 .

[0087] The lens holder 1300 is provided with a coupling hole 1310 that passes through the lens holder 1300 in the optical axis (Z axis) direction. The lens barrel 1100 is inserted into the coupling hole 1310 and fixedly disposed in the lens holder 1300. The lens holder 1300 may be used to fix the lens barrel 1100 relative to the housing 400. In another example, the lens barrel 1100 may also be directly coupled to the housing 400 and fixed.

[0088] In an example, the lens module 1000 is a fixed member fixed to the housing 400. For example, the lens module 1000 is a fixed member that does not move during auto focus (AF) and optical image stabilization (OIS).

[0089] The camera module 10 according to the example can perform auto focus (AF) and optical image stabilization (OIS) by moving the image sensor S instead of the lens module 1000. Since the relatively light image sensor S is moved, the image sensor S can be moved with a smaller amount of driving force. Therefore, the components constituting the actuator 1 can be reduced in size.

[0090] The actuator 1 includes a carrying portion 100 , a base 200 , a guide member 300 , and a housing 400 .

[0091] The carrier 100 can move in the direction of the optical axis (Z axis) and in a direction perpendicular to the optical axis (Z axis). Figure 3 , the image sensor S is disposed on the carrying portion 100 .

[0092] Therefore, the image sensor S can move together with the carrier 100 in the optical axis (Z axis) direction to adjust the focus, and the image sensor S can move together with the carrier 100 in a direction perpendicular to the optical axis (Z axis) to correct camera shake during shooting.

[0093] Reference Figure 3 When the lens module 1000 is coupled to the actuator 1, the lens module 1000 can be based on Figure 3 Set on the lower side. Figure 2 and Figure 3 , light is incident from the bottom to the top.

[0094] On the other hand, as another example, the lens module 1000 (instead of the image sensor S) may also be disposed in the carrier 100, and the image sensor S may be disposed in the housing 400. In this case, autofocus and optical image stabilization may be performed by moving the lens module 1000 instead of the image sensor S.

[0095] The carrier 100 is disposed on the base 200. For example, the carrier 100 may be stacked on the base 200. When adjusting the focus, the base 200 is a fixed member that does not move in the optical axis (Z axis) direction, and the carrier 100 is a movable member that moves in the optical axis (Z axis) direction.

[0096] The first ball member B1 is disposed between the bearing portion 100 and the base 200. The first ball member B1 is disposed to contact the bearing portion 100 and the base 200, respectively.

[0097] When the carrier 100 moves in the optical axis (Z axis) direction relative to the base 200 , the first ball member B1 supports the movement of the carrier 100 by rolling in the optical axis (Z axis) direction.

[0098] The base 200 can move in a direction perpendicular to the optical axis (Z axis). For example, the base 200 is a fixed member that does not move in the direction of the optical axis (Z axis) during focus adjustment, and is a movable member that moves in a direction perpendicular to the optical axis (Z axis) during optical image stabilization.

[0099] Since the carrier 100 is disposed on the base 200 , the base 200 and the carrier 100 move together in a direction perpendicular to the optical axis (Z axis) to compensate for camera shake.

[0100] The base 200 is disposed in the housing 400. The guide member 300 is disposed between the base 200 and the housing 400. For example, the guide member 300 and the base 200 are sequentially disposed in the housing 400 in the optical axis (Z axis) direction.

[0101] The guide member 300 may be configured to be movable in a first axis (X axis) direction, and the base 200 may be configured to be movable in the first axis (X axis) direction and a second axis (Y axis) direction.

[0102] For example, the guide member 300 and the base 200 may move together in the first axis (X axis) direction. In addition, the base 200 may move relative to the guide member 300 in the second axis (Y axis) direction.

[0103] The first axis (X axis) direction may indicate a direction perpendicular to the optical axis (Z axis), and the second axis (Y axis) direction may indicate a direction perpendicular to both the optical axis (Z axis) direction and the first axis (X axis) direction.

[0104] The second ball member B2 is disposed between the guide member 300 and the housing 400 , and the third ball member B3 is disposed between the guide member 300 and the base 200 .

[0105] The second ball member B2 is disposed to contact the guide member 300 and the housing 400 , respectively, and the third ball member B3 is disposed to contact the guide member 300 and the base 200 , respectively.

[0106] Figure 4 This is an exploded perspective view of the bearing part and the base. Figure 5 is a cross-sectional view taken along line II' in the assembled state of the bearing part and the base, and Figure 6 It is a cross-sectional view taken along line II-II' in the assembled state of the bearing part and the base.

[0107] Reference Figures 4 to 6 , the movement of the carrier 100 in the optical axis (Z-axis) direction will be described below.

[0108] The carrier 100 includes a body portion 110 and a guide portion 130. The body portion 110 may have a quadrangular frame shape. The guide portion 130 is disposed on one side of the body portion 110. For example, the guide portion 130 extends from one side of the body portion 110 in the optical axis (Z axis) direction.

[0109] The base 200 includes a seating portion 210 and a receiving portion 230. The seating portion 210 may have a quadrangular frame shape. The receiving portion 230 is disposed on one side of the seating portion 210. For example, the receiving portion 230 extends from one side of the seating portion 210 in the optical axis (Z axis) direction.

[0110] The body portion 110 of the carrier 100 is disposed on the seating portion 210 of the base 200. The seating portion 210 of the base 200 may serve as a stopper to limit the movement range of the carrier 100 when the carrier 100 moves downward in the optical axis (Z axis) direction.

[0111] A buffer member having elasticity may be provided on at least one of the surfaces facing each other of the body portion 110 of the carrier 100 and the seating portion 210 of the base 200. Therefore, when the carrier 100 and the base 200 collide, impact and noise may be reduced.

[0112] The guide portion 130 of the carrier 100 is received in the receiving portion 230 of the base 200. To this end, the receiving portion 230 of the base 200 is provided with an accommodating space in which the guide portion 130 of the carrier 100 can be received.

[0113] The guide portion 130 of the bearing 100 and the receiving portion 230 of the base 200 are respectively provided with first guide grooves g1, and the first ball member B1 is arranged in the first guide grooves g1. The first guide groove g1 has a shape having a length in the optical axis (Z axis) direction.

[0114] The first ball member B1 includes a plurality of balls arranged in the optical axis (Z axis) direction. When the bearing portion 100 moves in the optical axis (Z axis) direction, the plurality of balls can roll in the optical axis (Z axis) direction.

[0115] The first magnet 150 is disposed on the guide portion 130 of the carrier 100, and the second magnet 250 is disposed on the receiving portion 230 of the base 200. When the guide portion 130 of the carrier 100 is disposed in the receiving portion 230 of the base 200, the first magnet 150 and the second magnet 250 face each other.

[0116] The first magnet 150 and the second magnet 250 may generate an attractive force between each other. For example, the attractive force may act between the first magnet 150 and the second magnet 250 in a direction perpendicular to the optical axis (Z axis).

[0117] One of the first magnet 150 and the second magnet 250 may be a magnet, and the other may be a yoke. In another example, both the first magnet 150 and the second magnet 250 may be provided as magnets.

[0118] The first ball member B1 may come into contact with the bearing portion 100 and the base 200 by the attraction force of the first magnet 150 and the second magnet 250 .

[0119] The first ball member B1 includes a first ball group BG1 and a second ball group BG2, and the first ball group BG1 and the second ball group BG2 each include a plurality of balls arranged in the optical axis (Z-axis) direction.

[0120] The first ball group BG1 and the second ball group BG2 are spaced apart from each other in a direction perpendicular to the optical axis (Z axis) (eg, in the Y axis direction). The number of balls of the first ball group BG1 and the number of balls of the second ball group BG2 may be different from each other (see Figure 4 ).

[0121] For example, the first ball group BG1 includes three or more balls arranged in the optical axis (Z-axis) direction, and the second ball group BG2 includes two or less balls arranged in the optical axis (Z-axis) direction.

[0122] In the first ball group BG1, two balls disposed outermost in the optical axis (Z-axis) direction have the same diameter, and a ball disposed between the two outermost balls has a smaller diameter than the balls disposed outermost.

[0123] Furthermore, the two or less balls of the second ball group BG2 have the same diameter as the two balls disposed outermost in the optical axis (Z-axis) direction in the first ball group BG1.

[0124] In this case, the same diameter may not only mean physically the same, but may also include manufacturing tolerances.

[0125] Therefore, the first ball member B1 may contact the bearing portion 100 and the base 200 at least three points.

[0126] The actuator 1 for a camera according to an example includes a first driving unit 500. The first driving unit 500 may generate a driving force in an optical axis (Z axis) direction to move the carrier 100 in the optical axis (Z axis) direction.

[0127] The first driving unit 500 includes a first magnet 510 and a first coil 530. The first magnet 510 and the first coil 530 may be disposed to face each other in an optical axis (Z-axis) direction.

[0128] The first magnet 510 is disposed on the carrier 100. For example, the first magnet 510 may be disposed on the upper surface of the carrier 100. The first magnet 510 may be disposed on the upper surface of the guide portion 130 of the carrier 100. The upper surface of the carrier 100 may refer to a surface facing the cover 800 to be described later.

[0129] The first magnet 510 may be a monopole magnet in which the N pole and the S pole are magnetized in the optical axis (Z axis) direction. For example, the surface of the first magnet 510 facing the first coil 530 may have an S pole, and the opposite surface may have an N pole. The N pole and the S pole may also be magnetized relative to each other. A neutral region is formed between the N pole and the S pole.

[0130] The first coil 530 is disposed to face the first magnet 510. For example, the first coil 530 may be disposed to face the first magnet 510 in the optical axis (Z-axis) direction.

[0131] The first coil 530 is disposed on the first substrate 550. The first substrate 550 is mounted on a cover 800 to be described later so that the first magnet 510 and the first coil 530 face each other in the optical axis (Z-axis) direction.

[0132] The first magnet 510 is a moving member that is mounted on the carrier 100 and moves in the optical axis (Z-axis) direction together with the carrier 100 , and the first coil 530 is a fixed member fixed to the first substrate 550 and the cover 800 .

[0133] When power is applied to the first coil 530 , the carrier 100 may move in the optical axis (Z-axis) direction by electromagnetic influence between the first magnet 510 and the first coil 530 .

[0134] Since the image sensor S is disposed on the carrier 100 , the image sensor S also moves in the optical axis (Z-axis) direction due to the movement of the carrier 100 .

[0135] The actuator 1 for a camera according to an example may sense a position of the carrier 100 in the optical axis (Z-axis) direction.

[0136] To this end, a first position sensing unit 570 is provided. The first position sensing unit 570 includes a sensing magnet 571 and a first position sensor 573. The sensing magnet 571 is provided on the upper surface of the carrier 100, and the first position sensor 573 is provided on the first substrate 550 to face the sensing magnet 571. The first position sensor 573 may be a Hall sensor.

[0137] exist Figure 4 In the illustrated example, the first position sensing unit 570 includes a sensing magnet 571 and a first position sensor 573 , but the first position sensor 573 may also be disposed to face the first magnet 510 without providing a separate sensing magnet 571 .

[0138] Figure 7 is an exploded perspective view of the base, guide member and housing. Figure 8 is a bottom perspective view of the base and a perspective view of the guide member, and Fig. 9 is a bottom perspective view of the guide member and a perspective view of the housing.

[0139] The movement of the base 200 and the guide member 300 in the direction perpendicular to the optical axis (Z axis) will be referred to as Figures 7 to 9 Give a description.

[0140] The guide member 300 and the base 200 are disposed in the housing 400. For example, the guide member 300 and the base 200 are sequentially disposed in the housing 400 in the optical axis (Z axis) direction. Therefore, the guide member 300 is disposed between the lower surface of the base 200 and the bottom surface of the housing 400.

[0141] When viewed in the optical axis (Z axis) direction, the guide member 300 may have a shape in which both sides of the quadrilateral are removed. For example, when viewed in the optical axis (Z axis) direction, the guide member 300 may have or shape.

[0142] Since the guide member 300 is provided between the base 200 and the housing 400 , it is necessary to reduce the thickness of the guide member 300 to reduce the height of the actuator 1 in the optical axis (Z-axis) direction.

[0143] However, in the case where the thickness of the guide member 300 is reduced, the rigidity of the guide member 300 may be weakened, thereby reducing resistance to external impact.

[0144] Therefore, the guide member 300 may be provided with a reinforcement plate to reinforce the rigidity of the guide member 300 .

[0145] For example, the reinforcement plate may be integrally coupled to the guide member 300 by insert injection. In this case, the reinforcement plate may be manufactured integrally with the guide member 300 by injecting a resin material into the mold while fixing the reinforcement plate in the mold.

[0146] The reinforcing plate is disposed inside the guide member 300, and a portion of the reinforcing plate is exposed outside the guide member 300. In this way, when the reinforcing plate is integrally formed inside the guide member 300, by exposing a portion of the reinforcing plate to the outside of the guide member 300, the bonding force between the reinforcing plate and the guide member 300 can be improved, and the reinforcing plate can be prevented from being separated from the frame.

[0147] The reinforcing plate may be formed of a non-magnetic metal so that the reinforcing plate does not affect the magnetic fields of the second magnet 611 and the third magnet 631 of the second driving unit 600 which will be described later.

[0148] The guide member 300 may be configured to be movable in a first axis (X axis) direction, and the base 200 may be configured to be movable in the first axis (X axis) direction and a second axis (Y axis) direction.

[0149] For example, the guide member 300 and the base 200 may move together in the first axis (X axis) direction. In addition, the base 200 may move relative to the guide member 300 in the second axis (Y axis) direction.

[0150] Since the carrying part 100 is set on the base 200 and the image sensor S is set on the carrying part 100, the base 200 moves in the first axis (X axis) direction and the second axis (Y axis) direction, and therefore, the carrying part 100 and the image sensor S can also move in the first axis (X axis) direction and the second axis (Y axis) direction.

[0151] The actuator 1 according to the example includes a second driving unit 600. The second driving unit 600 may generate a driving force in a direction perpendicular to the optical axis (Z axis) to move the base 200 in the direction perpendicular to the optical axis (Z axis).

[0152] The second driving unit 600 includes a first sub driving unit 610 and a second sub driving unit 630. The first sub driving unit 610 may generate a driving force in a first axis (X axis) direction, and the second sub driving unit 630 may generate a driving force in a second axis (Y axis) direction.

[0153] The first sub driving unit 610 includes a second magnet 611 and a second coil 613. The second magnet 611 and the second coil 613 may be disposed to face each other in the optical axis (Z-axis) direction.

[0154] The second magnet 611 is disposed on the guide member 300. For example, the second magnet 611 may be disposed on a lower surface of the guide member 300. The lower surface of the guide member 300 may refer to a surface facing the bottom surface of the housing 400.

[0155] The surface of the second magnet 611 facing the second coil 613 may have an N pole and an S pole. For example, the surface of the second magnet 611 facing the second coil 613 may have an N pole, a neutral region, and an S pole sequentially arranged in the first axis (X axis) direction. The second magnet 611 has a shape having a length in the second axis (Y axis) direction.

[0156] The second coil 613 is disposed to face the second magnet 611. For example, the second coil 613 may be disposed to face the second magnet 611 in the optical axis (Z axis) direction. The second coil 613 also has a shape having a length in the second axis (Y axis) direction.

[0157] The second coil 613 is disposed on the second substrate 670. The second substrate 670 is mounted on the bottom surface of the housing 400 so that the second magnet 611 and the second coil 613 face each other in the optical axis (Z axis) direction.

[0158] The second magnet 611 is a movable member that is mounted on the guide member 300 and moves together with the guide member 300 , and the second coil 613 is a fixed member that is fixed to the second substrate 670 (eg, the housing 400 ).

[0159] When power is applied to the second coil 613 , the guide member 300 may move in the first axis (X axis) direction by electromagnetic influence between the second magnet 611 and the second coil 613 .

[0160] The second sub driving unit 630 includes a third magnet 631 and a third coil 633. The third magnet 631 and the third coil 633 may be disposed to face each other in the optical axis (Z-axis) direction.

[0161] The third magnet 631 is disposed on the base 200. For example, the third magnet 631 may be disposed on a lower surface of the base 200. The lower surface of the base 200 may refer to a surface facing the bottom surface of the housing 400.

[0162] The escape groove 310 is provided in the guide member 300 in such a manner that the third magnet 631 and the second coil 613 can directly face each other. The guide member 300 and the base 200 are sequentially provided in the housing 400 in the optical axis (Z axis) direction, and even when the third magnet 631 is provided on the base 200, the total height of the actuator 1 can be prevented from increasing by the escape groove 310 provided in the guide member 300.

[0163] The surface of the third magnet 631 facing the third coil 633 may have an N pole and an S pole. For example, the surface of the third magnet 631 facing the third coil 633 may have an N pole, a neutral region, and an S pole sequentially arranged in the second axis (Y axis) direction. The third magnet 631 has a shape having a length in the first axis (X axis) direction.

[0164] The third coil 633 is disposed to face the third magnet 631. For example, the third coil 633 may be disposed to face the third magnet 631 in the optical axis (Z axis) direction. The third coil 633 also has a shape having a length in the first axis (X axis) direction.

[0165] The third coil 633 is disposed on the second substrate 670. The second substrate 670 is mounted on the bottom surface of the housing 400 so that the third magnet 631 and the third coil 633 face each other in the optical axis (Z-axis) direction.

[0166] The third magnet 631 is a movable member that is mounted on the base 200 and moves together with the base 200 , and the third coil 633 may be a fixed member that is fixed to the second substrate 670 (housing 400 ).

[0167] When power is applied to the third coil 633 , the base 200 may move in the second axis (Y axis) direction by an electromagnetic influence between the third magnet 631 and the third coil 633 .

[0168] In this example, the second magnet 611 is mounted on the guide member 300 , and the third magnet 631 is mounted on the base 200 , but in another example, both the second magnet 611 and the third magnet 631 may be mounted on the base 200 .

[0169] like Figure 7 As shown, the second coil 613 and the third coil 633 may be provided as winding coils and mounted on the second substrate 670. In another example, the second coil 613 and the third coil 633 may be copper foil patterns stacked and embedded in the second substrate 670.

[0170] The second magnet 611 and the third magnet 631 are arranged perpendicularly to each other in a plane perpendicular to the optical axis (Z axis), and the second coil 613 and the third coil 633 are also positioned perpendicularly to each other in a plane perpendicular to the optical axis (Z axis).

[0171] The second ball member B2 is disposed between the guide member 300 and the housing 400 , and the third ball member B3 is disposed between the guide member 300 and the base 200 .

[0172] The second ball member B2 is disposed to contact the guide member 300 and the housing 400 , respectively, and the third ball member B3 is disposed to contact the guide member 300 and the base 200 , respectively.

[0173] The second ball member B2 and the third ball member B3 serve to guide the movement of the guide member 300 and the base 200 during the optical image stabilization process, and further, serve to maintain a gap between the base 200 , the guide member 300 , and the housing 400 .

[0174] The second ball member B2 guides the movement of the guide member 300 in the first axis (X axis) direction, and the third ball member B3 guides the movement of the base 200 in the second axis (Y axis) direction.

[0175] For example, when a driving force is generated in the first axis (X axis) direction, the second ball member B2 rolls in the first axis (X axis) direction. Therefore, the second ball member B2 guides the movement of the guide member 300 in the first axis (X axis) direction.

[0176] In addition, when a driving force is generated in the second axis (Y axis) direction, the third ball member B3 rolls in the second axis (Y axis) direction. Therefore, the third ball member B3 guides the movement of the base 200 in the second axis (Y axis) direction.

[0177] The second ball member B2 includes a plurality of balls disposed between the guide member 300 and the housing 400 , and the third ball member B3 is disposed between the base 200 and the guide member 300 .

[0178] The second guide groove g2 in which the second ball member B2 is disposed is formed in at least one of surfaces facing each other in the optical axis (Z axis) direction of the guide member 300 and the housing 400. The second guide groove g2 is provided in plurality to correspond to the plurality of balls of the second ball member B2.

[0179] The second ball member B2 is disposed in the second guide groove g2 and is fitted between the guide member 300 and the housing 400 .

[0180] When the second ball member B2 is accommodated in the second guide groove g2, the movement of the second ball member B2 in the optical axis (Z axis) and the second axis (Y axis) directions is restricted, and the second ball member B2 can only move in the first axis (X axis) direction. As an example, the second ball member B2 can only perform rolling motion in the first axis (X axis) direction.

[0181] To this end, the planar shape of the second guide groove g2 may be a rectangle having a length in the first axis (X axis) direction.

[0182] The third guide groove g3 in which the third ball member B3 is disposed is formed in at least one of surfaces facing each other in the optical axis (Z axis) direction of the base 200 and the guide member 300. The third guide groove g3 is provided in plurality to correspond to the plurality of balls of the third ball member B3.

[0183] The third ball member B3 is accommodated in the third guide groove g3 and is fitted between the base 200 and the guide member 300 .

[0184] When the third ball member B3 is accommodated in the third guide groove g3, the movement of the third ball member B3 in the optical axis (Z axis) and the first axis (X axis) directions is restricted, and the third ball member B3 can only move in the second axis (Y axis) direction. As an example, the third ball member B3 can only perform rolling motion in the second axis (Y axis) direction.

[0185] To this end, the planar shape of the third guide groove g3 may be a rectangle having a length in the second axis (Y axis) direction.

[0186] When the driving force is generated in the first axis (X axis) direction, the guide member 300 and the base 200 move together in the first axis (X axis) direction.

[0187] In this case, the second ball member B2 disposed between the guide member 300 and the housing 400 rolls along the first axis (X axis).

[0188] The third ball member B3 is arranged between the guide member 300 and the base 200, and the movement of the third ball member B3 in the first axis (X axis) direction is restricted. As a result, as the guide member 300 moves in the first axis (X axis) direction, the base 200 also moves in the first axis (X axis) direction.

[0189] In addition, when the driving force is generated in the second axis (Y axis) direction, the base 200 moves in the second axis (Y axis) direction.

[0190] At this time, the third ball member B3 disposed between the base 200 and the guide member 300 rolls along the second axis (Y axis).

[0191] The guide member 300 is movable in a first axis (X axis) direction, and the base 200 is movable in both the first axis (X axis) direction and the second axis (Y axis) direction.

[0192] Since the carrier 100 is disposed on the base 200 and the image sensor S is disposed on the carrier 100 , as a result, as the base 200 moves, the carrier 100 and the image sensor S also move in the first axis (X axis) direction and the second axis (Y axis) direction.

[0193] As described above, the carrier 100 can move relative to the base 200 in the optical axis (Z-axis) direction.

[0194] The image sensor S is electrically connected to the first substrate 550 or the second substrate 670. For example, the image sensor S may be electrically connected to the first substrate 550 or the second substrate 670 through a connection portion.

[0195] Since the image sensor S may move in three axial directions, a connection portion connecting the image sensor S and the first substrate 550 or the second substrate 670 to each other may be configured to be flexible.

[0196] For example, the connection portion may be provided in the form of a flexible film in which a conductor is patterned or in the form of a plurality of cables. Therefore, when the image sensor S moves, the connection portion may be bent.

[0197] The actuator 1 according to the example may sense the position of the base 200 in a direction perpendicular to the optical axis (Z axis).

[0198] To this end, a second position sensing unit 650 is provided. The second position sensing unit 650 includes a second position sensor 651 and a third position sensor 653. The second position sensor 651 is provided on the second substrate 670 to face the second magnet 611, and the third position sensor 653 is provided on the second substrate 670 to face the third magnet 631. The second position sensor 651 and the third position sensor 653 may be Hall sensors.

[0199] exist Figure 7 In the example shown, the second position sensor 651 is disposed to face the second magnet 611 without a separate sensing magnet, and the third position sensor 653 is disposed to face the third magnet 631. However, similar to the first position sensing unit 570, the second position sensing unit 650 may also be configured to further include a sensing magnet.

[0200] In the example, the yoke portion 700 is provided so that the base 200 , the guide member 300 , and the housing 400 can maintain a state of contact with the second ball member B2 and the third ball member B3 .

[0201] The yoke part 700 includes first and second yokes 710 and 730, and the first and second yokes 710 and 730 are fixed to the housing 400. For example, the first and second yokes 710 and 730 may be disposed on the second substrate 670, and the second substrate 670 may be fixed to the housing 400.

[0202] The first yoke 710 is disposed to face the second magnet 611 in the optical axis (Z-axis) direction, and the second yoke 730 is disposed to face the third magnet 631 in the optical axis (Z-axis) direction.

[0203] Therefore, attractive forces act between the first yoke 710 and the second magnet 611 and between the second yoke 730 and the third magnet 631 in the optical axis (Z-axis) direction, respectively.

[0204] Therefore, since the base 200 and the guide member 300 are pressed in the direction toward the yoke portion 700 , the contact state of the base 200 , the guide member 300 , and the housing 400 with the second ball member B2 and the third ball member B3 may be maintained.

[0205] The first yoke 710 and the second yoke 730 may be formed of a material capable of generating attractive forces between the first yoke 710 and the second magnet 611 and between the second yoke 730 and the third magnet 631. For example, the first yoke 710 and the second yoke 730 are provided as magnetic bodies.

[0206] Even when attractive force acts between the yoke part 700 and the second and third magnets 611 and 631 , the contact state between the respective components may be released due to external impact, etc. Therefore, in an example of the present disclosure, the cover 800 is provided to improve resistance to external impact, etc.

[0207] The cover 800 is coupled to the case 400 to cover at least a portion of the upper surface of the carrier 100. The cover 800 may be hook-coupled to the case 400.

[0208] Therefore, the cover 800 may be used as a stopper to prevent the bearing part 100 from being separated to the outside. A buffer member having elasticity may be provided on at least one of the surfaces of the cover 800 and the bearing part 100 facing each other. Therefore, in the event that the cover 800 and the bearing part 100 collide, impact and noise may be reduced.

[0209] In addition, the cover 800 may cover the upper surface of the guide portion 130 of the bearing 100 to prevent the first ball member B1 from being separated.

[0210] In the actuator 1 according to the example, the first coil 530 of the first driving unit 500 and the second coil 613 and the third coil 633 of the second driving unit 600 are fixed members.

[0211] When even some of the coils move during autofocus and / or optical image stabilization, there may be a problem that the connection between the coils and the substrate may become complicated.

[0212] However, in the case of the actuator 1 according to the example of the present disclosure, since all of the first coil 530 , the second coil 613 , and the third coil 633 do not move during auto focusing and optical image stabilization, the connection between each coil and the substrate can be simplified.

[0213] In addition, even if the carrier 100 moves in the optical axis (Z-axis) direction during focus adjustment, the driving force for optical image stabilization can be accurately controlled because the relative positions of the second magnet 611 and the second coil 613 and the relative positions of the third magnet 631 and the third coil 633 do not change.

[0214] Fig.10 is a schematic exploded perspective view of an actuator for a camera according to another example.

[0215] Fig.10 The example shown is similar to the example in terms of the positions of the first magnet 510 and the first coil 530. Figure 3 The examples shown are different.

[0216] Reference Fig.10 , the first magnet 510 is arranged on the carrier 100. For example, the first magnet 510 may be disposed on the upper surface of the carrier 100. Figure 3 Unlike the illustrated example, the first magnet 510 may be provided on the remaining surface of the upper surface of the carrier 100 in addition to the upper surface of the guide portion 130 .

[0217] For example, the first magnet 510 may be located anywhere on the upper surface of the carrier 100 .

[0218] Since the first magnet 510 may be disposed anywhere on the upper surface of the carrier 100 , at least a portion of the first magnet 510 may be disposed to overlap with the second magnet 611 or the third magnet 631 in the optical axis (Z axis) direction depending on the position of the first magnet 510 .

[0219] exist Fig.10 In the example shown, the first magnet 510 is located at a position overlapping with the third magnet 631 in the optical axis (Z-axis) direction.

[0220] In this case, since the magnetic field of the first magnet 510 may affect the third coil 633, or the magnetic field of the third magnet 631 may affect the first coil 530, a yoke may be provided between the first magnet 510 and the third magnet 631. The yoke may be provided on the lower surface of the carrier 100 or the upper surface of the base 200. The yoke may be formed of a magnetic metal material.

[0221] Fig.11 is a schematic cross-sectional view of a camera module according to another example, and Fig.12 is a perspective view of a portable electronic device P according to another example.

[0222] Reference Fig.11 and Fig.12 , a camera module 20 according to another example includes a housing 23 , a reflective member R, a lens module 21 , and an actuator 1 .

[0223] In this example, the optical axis (Z axis) of the lens module 21 can be in a direction perpendicular to the thickness direction of the portable electronic device P (X axis direction, the direction from the front surface to the rear surface of the portable electronic device P, or the direction from the rear surface to the front surface of the portable electronic device P).

[0224] For example, the optical axis (Z axis) of the lens module 21 may be formed in the width direction or the length direction of the portable electronic device P.

[0225] When components constituting the camera module are stacked in the thickness direction of the portable electronic device P, there is a problem that the thickness of the portable electronic device P increases.

[0226] However, in the camera module 20 of this example, since the optical axis (Z axis) of the lens module 21 is formed in the width direction or the length direction of the portable electronic device P, the thickness of the portable electronic device P can be reduced.

[0227] The reflective member R and the lens module 21 are disposed in the housing 23. The housing 23 has an internal space accommodating the reflective member R and the lens module 21. However, a structure may be provided in which the reflective member R and the lens module 21 are respectively disposed in separate housings 23 and the respective housings 23 are coupled to each other.

[0228] The reflective member R is configured to change the traveling direction of light. For example, the traveling direction of light incident into the housing 23 may be changed toward the lens module 21 by the reflective member R. The reflective member R may be a reflective mirror or a prism that reflects light.

[0229] The actuator 1 is connected to the housing 23. The actuator 1 may be a reference Figures 2 to 10 An actuator 1 is described.

[0230] The actuator 1 is equipped with an image sensor S, and the image sensor S can be moved in the optical axis (Z axis) direction, the first axis (X axis) direction, and the second axis (Y axis) direction by the first driving unit 500 and the second driving unit 600 .

[0231] Since the image sensor S mounted on the actuator 1 can move in the optical axis (Z axis) direction, the first axis (X axis) direction, and the second axis (Y axis) direction, focus adjustment and optical image stabilization functions can be performed by movement of the image sensor S.

[0232] Fig.13 is a perspective view of a camera module according to another example, and Fig.14 is a schematic exploded perspective view of a camera module according to another example.

[0233] Fig.15 is a stereogram of the lens and lens barrel, and Fig.16 is a modified example of the lens barrel.

[0234] Reference Fig.13 and Fig.14 , a camera module 30 according to another example includes a lens module 1000 and an actuator 2 .

[0235] The lens module 1000 includes at least one lens L and a lens barrel 1100. The at least one lens L is disposed inside the lens barrel 1100. When a plurality of lenses L are provided, the plurality of lenses L are installed in the lens barrel 1100 along an optical axis (Z axis).

[0236] The lens module 1000 may further include a lens holder 1300 coupled to the lens barrel 1100 .

[0237] The lens holder 1300 is provided with a coupling hole 1310 that passes through the lens holder 1300 in the optical axis (Z axis) direction. The lens barrel 1100 is inserted into the coupling hole 1310 and fixedly disposed in the lens holder 1300. The lens holder 1300 may be used to fix the lens barrel 1100 relative to the housing 5000. In another example, the lens barrel 1100 may also be directly connected to the housing 5000 and fixed.

[0238] In this example, the lens module 1000 is a fixed member fixed to the housing 5000. For example, the lens module 1000 is a fixed member that does not move during auto focus (AF) and optical image stabilization (OIS).

[0239] The camera module 30 can perform auto focus (AF) and optical image stabilization (OIS) by moving the image sensor S instead of the lens module 1000. Since the relatively light image sensor S is moved, the image sensor S can be moved with a relatively small driving force. Therefore, the components constituting the actuator 2 can be reduced in size.

[0240] Reference Fig.13 and Fig.14 , light is incident from top to bottom. For example, when Figure 2 and Figure 3 When compared, Fig.13 and Fig.14 The drawings shown in FIG. 1 are turned upside down.

[0241] The actuator 2 includes a carrying portion 2000 , a base 3000 , a guide member 4000 , and a housing 5000 .

[0242] The carrying part 2000 can move in the direction of the optical axis (Z axis) and in a direction perpendicular to the optical axis (Z axis). Fig.14 , the image sensor S is disposed on the carrying portion 2000 .

[0243] Therefore, the image sensor S moves together with the carrier 2000 in the optical axis (Z axis) direction to adjust the focus, and moves together with the carrier 2000 in a direction perpendicular to the optical axis (Z axis) to compensate for camera shake during shooting.

[0244] The base 3000 can move in a direction perpendicular to the optical axis (Z axis). For example, the base 3000 is a fixed member that does not move in the direction of the optical axis (Z axis) during focus adjustment, and is a movable member that moves in a direction perpendicular to the optical axis (Z axis) during optical image stabilization.

[0245] Since the carrier 2000 is disposed on the base 3000, the base 3000 and the carrier 2000 move together in a direction perpendicular to the optical axis (Z axis) to compensate for camera shake. During focus adjustment, the carrier 2000 moves relative to the base 3000.

[0246] The base 3000 is disposed in the housing 5000. The guide member 4000 is disposed between the base 3000 and the housing 5000. For example, the guide member 4000 and the base 3000 are sequentially disposed in the housing 5000 in the optical axis (Z axis) direction.

[0247] The guide member 4000 may be configured to be movable in a first axis (X axis) direction, and the base 3000 may be configured to be movable in the first axis (X axis) direction and a second axis (Y axis) direction.

[0248] For example, the guide member 4000 and the base 3000 may move together in the first axis (X axis) direction. In addition, the base 3000 may move relative to the guide member 4000 in the second axis (Y axis) direction.

[0249] The first axis (X axis) direction may indicate a direction perpendicular to the optical axis (Z axis), and the second axis (Y axis) direction may indicate a direction perpendicular to both the optical axis (Z axis) direction and the first axis (X axis) direction.

[0250] The first ball member B4 is disposed between the guide member 4000 and the housing 5000 , and the second ball member B5 is disposed between the guide member 4000 and the base 3000 .

[0251] The first ball member B4 is disposed to contact the guide member 4000 and the housing 5000 , respectively, and the second ball member B5 is disposed to contact the guide member 4000 and the base 3000 , respectively.

[0252] The carrier 2000 is disposed on the base 3000. For example, the carrier 2000 and the base 3000 may be stacked in the optical axis (Z axis) direction. When adjusting the focus, the base 3000 is a fixed member that does not move in the optical axis (Z axis) direction, and the carrier 2000 is a movable member that moves in the optical axis (Z axis) direction.

[0253] The third ball member B6 is disposed between the bearing portion 2000 and the base 3000. The third ball member B6 is disposed to contact the bearing portion 2000 and the base 3000, respectively.

[0254] When the carrier 2000 moves in the optical axis (Z axis) direction relative to the base 3000 , the third ball member B6 supports the movement of the carrier 2000 by rolling in the optical axis (Z axis) direction.

[0255] Reference Fig.15 and Fig.16 , the lens barrel 1100 may be configured to have a partial cylindrical shape, or may be configured to have a cylindrical shape as a whole.

[0256] Reference Fig.15 , the lens barrel 1100 may include a first barrel 1110 and a second barrel 1130. The first barrel 1110 and the second barrel 1130 may be used to refer to an upper portion and a lower portion of one lens barrel 1100, respectively. In another example, the first barrel 1110 and the second barrel 1130 may be provided as separate components and coupled to each other.

[0257] The first lens barrel 1110 may have a cylindrical shape including an inner space, and the second lens barrel 1130 may have a quadrangular box shape including an inner space. The upper surface of the first lens barrel 1110 and the lower surface of the second lens barrel 1130 are respectively provided with passage holes through which light passes.

[0258] A lens L1 having a circular planar shape (hereinafter referred to as “first lens”) is disposed inside the first lens barrel 1110 , and a lens ( L2 , hereinafter referred to as “second lens”) having a non-circular planar shape is disposed inside the second lens barrel 1130 .

[0259] For example, when viewed in the optical axis (Z-axis) direction, the second lens L2 is non-circular.

[0260] In a plane perpendicular to the optical axis (Z axis), the second lens L2 has a length T1 in the direction of the first axis (X axis) perpendicular to the optical axis (Z axis), and the length T1 is greater than the length T2 in the direction of the second axis (Y axis) perpendicular to both the optical axis (Z axis) and the first axis (X axis).

[0261] For example, the second lens L2 has a major axis and a minor axis. A line segment connecting both sides of the second lens L2 in the first axis (X axis) direction while passing through the optical axis (Z axis) is the major axis, and a line segment connecting both sides of the second lens L2 in the second axis (Y axis) direction while passing through the optical axis (Z axis) is the minor axis. The major axis and the minor axis are perpendicular to each other, and the length of the major axis is greater than the length of the minor axis.

[0262] Second lens L2 has four side surfaces along the circumference of second lens L2 When viewed in the optical axis direction, two of the four side surfaces have an arc shape, and the other two side surfaces have a substantially linear shape.

[0263] Generally, since the image sensor S of the camera module 30 is rectangular, not all of the light refracted by the circular lens forms an image on the image sensor S.

[0264] In this example, since the second lens L2 has a non-circular planar shape, the lens L and the lens barrel 1100 can be miniaturized without affecting image formation, and thus, the size of the camera module 30 can be reduced.

[0265] On the other hand, second lens L2 has a major axis and a minor axis, and thus has a maximum diameter and a minimum diameter. In this case, the maximum diameter of second lens L2 is larger than the diameter of first lens L1.

[0266] For example, second lens L2 having a relatively large diameter may have a non-circular plan shape.

[0267] Fig.17is an exploded perspective view of a lens module, a first substrate, a housing, a guide member and a base, Fig.18 is an exploded perspective view of the first substrate, the housing and the guide member, Fig.19 is an exploded perspective view of the guide member and the base, and Fig. 20 is a modified example of the guide member and the base.

[0268] also, Fig.21 is along Fig.17 A cross-sectional view taken along line III-III', and Fig. 22 is along Fig.17 A cross-sectional view taken along line IV-IV'.

[0269] Reference Figures 17 to 22 , the movement of the base 3000 and the guide member 4000 in the direction perpendicular to the optical axis (Z axis) will be described.

[0270] The guide member 4000 and the base 3000 are disposed in the housing 5000. For example, the guide member 4000 and the base 3000 are sequentially disposed in the housing 5000 in the optical axis (Z axis) direction. Therefore, the guide member 4000 is disposed between the housing 5000 and the base 3000.

[0271] When viewed in the optical axis (Z axis) direction, the guide member 4000 may have a shape in which both sides of the quadrilateral are removed. For example, when viewed in the optical axis (Z axis) direction, the guide member 4000 may have or shape.

[0272] Since the guide member 4000 is disposed between the housing 5000 and the base 3000 , reducing the thickness of the guide member 4000 reduces the height of the actuator 1 in the optical axis (Z-axis) direction.

[0273] However, in the case where the thickness of the guide member 4000 is reduced, the rigidity of the guide member 4000 may be weakened, thereby reducing resistance to external impact.

[0274] Therefore, the guide member 4000 may be provided with a reinforcement plate to reinforce the rigidity of the guide member 4000 .

[0275] For example, the reinforcement plate may be integrally coupled to the guide member 4000 by insert injection. In this case, the reinforcement plate may be manufactured to be integrated with the guide member 4000 by injecting a resin material into the mold while fixing the reinforcement plate in the mold.

[0276] The reinforcing plate may be provided inside the guide member 4000. In addition, the reinforcing plate may be provided so that a portion thereof is exposed to the outside of the guide member 4000. In this way, when the reinforcing plate is integrally formed inside the guide member 4000, by exposing a portion of the reinforcing plate to the outside of the guide member 4000, the coupling force between the reinforcing plate and the guide member 4000 may be improved, and the reinforcing plate may be prevented from being separated from the guide member 4000.

[0277] The reinforcing plate may be formed of a non-magnetic metal so that the reinforcing plate does not affect the magnetic fields of the first magnet 6110 and the second magnet 6310 of the first driving unit 6000 which will be described later.

[0278] The guide member 4000 may be configured to be movable in a first axis (X axis) direction, and the base 3000 may be configured to be movable in the first axis (X axis) direction and a second axis (Y axis) direction.

[0279] For example, the guide member 4000 and the base 3000 may move together in the first axis (X axis) direction. In addition, the base 3000 may move relative to the guide member 4000 in the second axis (Y axis) direction.

[0280] The carrier 2000 is disposed on the base 3000, and the image sensor S is disposed on the carrier 2000. Therefore, when the base 3000 moves in the first axis (X axis) direction and the second axis (Y axis) direction, the carrier 2000 and the image sensor S can also move in the first axis (X axis) direction and the second axis (Y axis) direction.

[0281] The actuator 2 according to this example includes a first driving unit 6000. The first driving unit 6000 may generate a driving force in a direction perpendicular to the optical axis (Z axis) to move the base 3000 in the direction perpendicular to the optical axis (Z axis).

[0282] The first driving unit 6000 includes a first sub driving unit 6100 and a second sub driving unit 6300. The first sub driving unit 6100 may generate a driving force in a first axis (X axis) direction, and the second sub driving unit 6300 may generate a driving force in a second axis (Y axis) direction.

[0283] The first sub driving unit 6100 includes a first magnet 6110 and a first coil 6130. The first magnet 6110 and the first coil 6130 may be disposed to face each other in the optical axis (Z-axis) direction.

[0284] The first magnet 6110 is disposed on the guide member 4000. For example, the first magnet 6110 may be disposed on a or The mounting groove 4100 in which the first magnet 6110 is disposed may be disposed on one side of the guide member 4000. By inserting the first magnet 6110 into the mounting groove 4100, an increase in the total height of the actuator 2 and the camera module 30 due to the thickness of the first magnet 6110 may be prevented.

[0285] The first back yoke 6150 may be disposed between the guide member 4000 and the first magnet 6110. The first back yoke 6150 may improve driving force by preventing magnetic flux of the first magnet 6110 from leaking.

[0286] The first magnet 6110 may be magnetized so that one surface (e.g., the surface facing the first coil 6130) has both an N pole and an S pole. For example, an N pole, a neutral region, and an S pole may be sequentially arranged in the first axis (X axis) direction on one surface of the first magnet 6110 facing the first coil 6130. The first magnet 6110 has a shape having a length in the second axis (Y axis) direction.

[0287] The other surface of the first magnet 6110 (e.g., the surface opposite to the above-mentioned one surface) can be magnetized to have both an S pole and an N pole. For example, on the other surface of the first magnet 6110, an S pole, a neutral region, and an N pole can be sequentially arranged in the first axis (X axis) direction.

[0288] The first coil 6130 is disposed to face the first magnet 6110. For example, the first coil 6130 may be disposed to face the first magnet 6110 in the optical axis (Z axis) direction. The first coil 6130 has a hollow annular shape and has a length in the second axis (Y axis) direction.

[0289] The first coil 6130 is provided on the first substrate 8100. The first substrate 8100 is mounted on the housing 5000 such that the first magnet 6110 and the first coil 6130 face each other in the optical axis (Z-axis) direction.

[0290] The through hole 5100 is provided in the housing 5000. For example, the through hole 5100 may be configured to pass through the upper surface of the housing 5000 in the optical axis (Z axis) direction. The first coil 6130 is provided in the through hole 5100 of the housing 5000. By providing the first coil 6130 in the through hole 5100 of the housing 5000, the total height of the actuator 2 and the camera module 30 can be prevented from increasing due to the thickness of the first coil 6130.

[0291] The first magnet 6110 is a movable member that is mounted on the guide member 4000 and moves together with the guide member 4000 , and the first coil 6130 is a fixed member fixed to the first substrate 8100 and the housing 5000 .

[0292] When power is applied to the first coil 6130 , the guide member 4000 may move in the first axis (X axis) direction by the electromagnetic force between the first magnet 6110 and the first coil 6130 .

[0293] The second sub driving unit 6300 includes a second magnet 6310 and a second coil 6330. The second magnet 6310 and the second coil 6330 may be disposed to face each other in the optical axis (Z-axis) direction.

[0294] The second magnet 6310 is disposed on the base 3000. The second back yoke 6350 may be disposed between the base 3000 and the second magnet 6310. The second back yoke 6350 may improve driving force by preventing magnetic flux of the second magnet 6310 from leaking.

[0295] The escape hole 4300 is provided in the guide member 4000 so that the second magnet 6310 and the second coil 6330 can directly face each other. or The escape hole 4300 may pass through the other side of the guide member 4000 in the optical axis (Z axis) direction.

[0296] The second magnet 6310 is disposed in the escape hole 4300 of the guide member 4000 in a state of being mounted on the base 3000. Therefore, the second magnet 6310 may directly face the second coil 6330 through the escape hole 4300.

[0297] The guide member 4000 and the base 3000 are sequentially arranged in the housing 5000 in the optical axis (Z axis) direction, and even when the second magnet 6310 is set on the base 3000, the total height of the actuator 2 and the camera module 30 can be prevented from increasing by the escape hole 4300 set in the guide member 4000.

[0298] The second magnet 6310 may be magnetized so that one surface (e.g., the surface facing the second coil 6330) has both an S pole and an N pole. For example, an S pole, a neutral region, and an N pole may be sequentially arranged on one surface of the second magnet 6310 facing the second coil 6330 in the second axis (Y axis) direction. The second magnet 6310 has a shape having a length in the first axis (X axis) direction.

[0299] The other surface of the second magnet 6310 (e.g., the surface opposite to the above-mentioned one surface) may be magnetized to have an N pole and an S pole. For example, on the other surface of the second magnet 6310, an N pole, a neutral region, and an S pole may be sequentially arranged in the second axis (Y axis) direction.

[0300] The second coil 6330 is disposed to face the second magnet 6310. For example, the second coil 6330 may be disposed to face the second magnet 6310 in the optical axis (Z axis) direction. The second coil 6330 has a hollow annular shape and has a length in the first axis (X axis) direction.

[0301] The second coil 6330 is disposed on the first substrate 8100. The first substrate 8100 is mounted on the housing 5000 such that the second magnet 6310 and the second coil 6330 face each other in the optical axis (Z-axis) direction.

[0302] The through hole 5100 is provided in the housing 5000. For example, the through hole 5100 may be configured to pass through the upper surface of the housing 5000 in the optical axis (Z axis) direction. The second coil 6330 is provided in the through hole 5100 of the housing 5000. By providing the second coil 6330 in the through hole 5100 of the housing 5000, the total height of the actuator 2 and the camera module 30 can be prevented from increasing due to the thickness of the second coil 6330.

[0303] The second magnet 6310 is a moving member that is mounted on the base 3000 and moves together with the base 3000 , and the second coil 6330 is a fixed member that is fixed to the first substrate 8100 and the housing 5000 .

[0304] When power is applied to the second coil 6330 , the base 3000 may be moved in the second axis (Y axis) direction by the electromagnetic force acting between the second magnet 6310 and the second coil 6330 .

[0305] In this example, the first magnet 6110 is mounted on the guide member 4000, and the second magnet 6310 is mounted on the base 3000. As another example, referring to Fig. 20 , both the first magnet 6110 and the second magnet 6310 may be mounted on the base 3000. In this case, the escape hole 4300 may also be provided in the above-mentioned one side of the guide member 4000.

[0306] like Fig.17 As shown, the first coil 6130 and the second coil 6330 may be provided as winding coils and mounted on the first substrate 8100. In another example, the first coil 6130 and the second coil 6330 may be copper foil patterns stacked and embedded in the first substrate 8100.

[0307] The first magnet 6110 and the second magnet 6310 are arranged perpendicularly to each other in a plane perpendicular to the optical axis (Z axis), and the first coil 6130 and the second coil 6330 are also positioned perpendicularly to each other in a plane perpendicular to the optical axis (Z axis).

[0308] The first ball member B4 is disposed between the guide member 4000 and the housing 5000 , and the second ball member B5 is disposed between the guide member 4000 and the base 3000 .

[0309] The first ball member B4 is disposed to contact the guide member 4000 and the housing 5000 , respectively, and the second ball member B5 is disposed to contact the guide member 4000 and the base 3000 , respectively.

[0310] The first ball member B4 and the second ball member B5 serve to guide the movement of the guide member 4000 and the base 3000 during camera shake compensation, and further, serve to maintain a gap between the base 3000 , the guide member 4000 , and the housing 5000 .

[0311] The first ball member B4 guides the movement of the guide member 4000 in the first axis (X axis) direction, and the second ball member B5 guides the movement of the base 3000 in the second axis (Y axis) direction.

[0312] For example, when a driving force in the first axis (X axis) direction is generated, the first ball member B4 rolls in the first axis (X axis) direction. Therefore, the first ball member B4 guides the movement of the guide member 4000 in the first axis (X axis) direction.

[0313] In addition, when a driving force is generated in the second axis (Y axis) direction, the second ball member B2 rolls in the second axis (Y axis) direction. Therefore, the second ball member B2 guides the movement of the base 3000 in the second axis (Y axis) direction.

[0314] The first ball member B4 includes a plurality of balls disposed between the guide member 4000 and the housing 5000 , and the second ball member B5 includes a plurality of balls disposed between the base 3000 and the guide member 4000 .

[0315] Reference Fig.18 At least one of the surfaces of the guide member 4000 and the housing 5000 facing each other in the optical axis (Z axis) direction is provided with a first guide groove g4 in which the first ball member B4 is provided. The first guide groove g4 is provided as a plurality of first guide grooves g4 to correspond to the plurality of balls of the first ball member B4.

[0316] The first ball member B4 is disposed in the first guide groove g4 and is fitted between the guide member 4000 and the housing 5000 .

[0317] When accommodated in the first guide groove g4, the first ball member B4 is restricted in movement in the optical axis (Z axis) and the second axis (Y axis) directions, and can only move in the first axis (X axis) direction. As an example, the first ball member B4 can only perform rolling movement in the first axis (X axis) direction.

[0318] To this end, the first guide groove g4 may have a shape having a length in the first axis (X axis) direction.

[0319] Reference Fig.19 At least one of the surfaces of the base 3000 and the guide member 4000 facing each other in the optical axis (Z axis) direction has a second guide groove g5 in which the second ball member B5 is disposed. The second guide groove g5 is provided as a plurality of second guide grooves to correspond to the plurality of balls of the second ball member B5.

[0320] The second ball member B5 is received in the second guide groove g5 and is fitted between the base 3000 and the guide member 4000 .

[0321] When accommodated in the second guide groove g5, the second ball member B5 is restricted in movement in the optical axis (Z axis) and the first axis (X axis) directions, and can only move in the second axis (Y axis) direction. As an example, the second ball member B5 can only perform rolling movement in the second axis (Y axis) direction.

[0322] To this end, the second guide groove g5 may have a shape having a length in the second axis (Y axis) direction.

[0323] like Fig.21 As shown, when a driving force is generated in the first axis (X axis) direction, the guide member 4000 and the base 3000 move together in the first axis (X axis) direction.

[0324] At this time, the first ball member B4 provided between the guide member 4000 and the housing 5000 rolls along the first axis (X axis).

[0325] The second ball member B5 is arranged between the guide member 4000 and the base 3000, and the movement of the second ball member B5 in the first axis (X axis) direction is restricted, and as a result, as the guide member 4000 moves in the first axis (X axis) direction, the base 3000 also moves in the first axis (X axis) direction.

[0326] like Fig. 22 As shown, when a driving force is generated in the second axis (Y axis) direction, the base 3000 moves in the second axis (Y axis) direction.

[0327] At this time, the second ball member B5 provided between the base 3000 and the guide member 4000 rolls along the second axis (Y axis).

[0328] The guide member 4000 may move in a first axis (X axis) direction, and the base 3000 may move in both the first axis (X axis) direction and the second axis (Y axis) direction.

[0329] Since the carrier 2000 is disposed on the base 3000 and the image sensor S is disposed on the carrier 2000 , as a result, as the base 3000 moves, the carrier 2000 and the image sensor S also move in the first axis (X axis) direction and the second axis (Y axis) direction.

[0330] On the other hand, the first buffer member d1 having elasticity may be provided on at least one of the surfaces of the base 3000 and the housing 5000 facing each other in a direction perpendicular to the optical axis (Z axis). Fig.21 and Fig. 22 , the first buffer member d1 may be disposed on a side surface of the base 3000. The base 3000 has four side surfaces, and on each side surface of the base 3000, the first buffer member d1 may be disposed to be spaced apart from each other at at least two locations on each side surface. The first buffer member d1 may be formed of a material having elastic properties. For example, the first buffer member d1 may be formed of a rubber material.

[0331] Therefore, when the base 3000 moving in the first axis (X axis) direction and the second axis (Y axis) direction collides with the housing 5000 , impact and noise are reduced by the first buffer member d1 .

[0332] The actuator 2 according to this example can detect the position of the base 3000 in the direction perpendicular to the optical axis (Z axis).

[0333] To this end, a first position sensing unit 6500 (see Fig.17 ). The first position sensing unit 6500 includes a first position sensor 6510 and a second position sensor 6530. The first position sensor 6510 is disposed on the first substrate 8100 to face the first magnet 6110, and the second position sensor 6530 is disposed on the first substrate 8100 to face the second magnet 6310. The first position sensor 6510 and the second position sensor 6530 may be Hall sensors.

[0334] On the other hand, in another example, a separate position sensor may not be provided. In this case, the first coil 6130 and the second coil 6330 may be used as the first position sensing unit 6500 .

[0335] For example, the position of the base 3000 may be sensed by changes in inductance of the first coil 6130 and the second coil 6330 .

[0336] For example, when the base 3000 moves, the first magnet 6110 and the second magnet 6310 also move, and thus, the inductance of the first coil 6130 and the second coil 6330 changes. Therefore, the position of the base 3000 can be sensed by the change in the inductance of the first coil 6130 and the second coil 6330.

[0337] On the other hand, refer to Fig.17 and Fig.18 , the actuator 2 according to this example includes a yoke portion 9000. The yoke portion 9000 provides pressure so that the contact state of the base 3000, the guide member 4000, and the housing 5000 with the first ball member B4 and the second ball member B5 can be maintained.

[0338] The yoke part 9000 includes a first yoke 9100 and a second yoke 9300, and the first yoke 9100 and the second yoke 9300 are fixed to the housing 5000. For example, the first yoke 9100 and the second yoke 9300 may be disposed on the first substrate 8100, and the first substrate 8100 may be fixed to the housing 5000.

[0339] The first coil 6130 and the second coil 6330 are disposed on one surface of the first substrate 8100 , and the first yoke 9100 and the second yoke 9300 are disposed on the other surface of the first substrate 8100 .

[0340] The first yoke 9100 is disposed to face the first magnet 6110 in the optical axis (Z-axis) direction, and the second yoke 9300 is disposed to face the second magnet 6310 in the optical axis (Z-axis) direction.

[0341] Therefore, attractive forces act between the first yoke 9100 and the first magnet 6110 and between the second yoke 9300 and the second magnet 6310 in the optical axis (Z-axis) direction, respectively.

[0342] Therefore, since the base 3000 and the guide member 4000 are pressed in the direction toward the yoke portion 9000, the contact state of the base 3000, the guide member 4000, and the housing 5000 with the first and second ball members B4 and B5 can be maintained.

[0343] The first yoke 9100 and the second yoke 9300 are materials capable of generating attractive forces between the first yoke 9100 and the first magnet 6110 and between the second yoke 9300 and the second magnet 6310. For example, the first yoke 9100 and the second yoke 9300 are provided as magnets.

[0344] In this example, the first magnet 6110 is mounted on the guide member 4000, and the second magnet 6310 is mounted on the base 3000. Therefore, the guide member 4000 is pulled toward the first yoke 9100 by the attraction between the first yoke 9100 and the first magnet 6110, and the base 3000 is pulled toward the second yoke 9300 by the attraction between the second yoke 9300 and the second magnet 6310.

[0345] In this case, refer to Fig.17 and Fig. 22 The third yoke 9500 may be disposed on the base 3000 so that the guide member 4000 and the base 3000 are pressed against each other. The third yoke 9500 may be disposed on the base 3000 to be disposed at a position facing the first magnet 6110 in the optical axis (Z axis) direction.

[0346] Therefore, an attractive force acts between the third yoke 9500 and the first magnet 6110 also in the optical axis (Z-axis) direction, and therefore, the guide member 4000 and the base 3000 can also be pressed against each other.

[0347] For example, when attractive force acts between the yoke portion 9000 and the first and second magnets 6110 and 6310 , the contact state between the respective components may be released due to external impact, etc. Therefore, in this example, the cover 5300 is provided to improve resistance to external impact, etc.

[0348] The cover 5300 may be hook-coupled to the housing 5000 .

[0349] In the case of the actuator 2 according to this example, even when the carrier 2000 moves in the optical axis (Z-axis) direction during focus adjustment, the driving force for optical image stabilization can be precisely controlled because the relative positions of the first magnet 6110 and the first coil 6130 and the relative positions of the second magnet 6310 and the second coil 6330 do not change.

[0350] Fig.23 This is an exploded perspective view of the bearing part and the base. Fig.24A and Fig. 24B This is a bottom perspective view of the base. Fig.25 is along Fig. 24B A cross-sectional view taken along line V-V' of Fig.26 It is a bottom stereogram of the bearing portion.

[0351] Fig. 27 is along Fig.23 A cross-sectional view taken along line VI-VI', Fig.28 is along Fig.23 A cross-sectional view taken along line VII-VII', and Fig.29 is along Fig.23 A cross-sectional view taken along line VIII-VIII'.

[0352] Fig.30 is a modified example of the position of the third magnet.

[0353] The movement of the carrier 2000 in the direction of the optical axis (Z axis) will refer to Figures 23 to 30 Give a description.

[0354] The carrier 2000 includes a body portion 2100 and a guide portion 2300. The body portion 2100 may have a quadrangular frame shape. The guide portion 2300 is disposed on one side of the body portion 2100. For example, the guide portion 2300 extends from one side of the body portion 2100 in the optical axis (Z axis) direction.

[0355] The base 3000 includes a seating portion 3100 and a receiving portion 3300. The seating portion 3100 may have a quadrangular frame shape. The receiving portion 3300 is disposed on one side of the seating portion 3100. For example, the receiving portion 3300 extends from one side of the seating portion 3100 in the optical axis (Z axis) direction.

[0356] The main body 2100 of the carrier 2000 is disposed on the placement portion 3100 of the base 3000. Fig.23 , the carrying portion 2000 is arranged so that the upper surface of the main body portion 2100 faces the lower surface of the seating portion 3100 of the base 3000 .

[0357] When the carrier 2000 moves upward in the optical axis (Z-axis) direction, the seating portion 3100 of the base 3000 may function as a stopper that limits the moving range of the carrier 2000 .

[0358] The second buffer member d2 having elasticity is provided on at least one of the surfaces of the main body portion 2100 of the bearing portion 2000 and the seating portion 3100 of the base 3000 facing each other in the optical axis (Z axis) direction. Fig.23 , the second buffer member d2 may be disposed on the upper surface of the main body portion 2100 of the bearing portion 2000. The second buffer members d2 may be disposed to be spaced apart from each other at at least three locations on the upper surface of the main body portion 2100 of the bearing portion 2000. The second buffer member d2 may be formed of a material having elastic properties. For example, the second buffer member d2 may be formed of a rubber material.

[0359] Therefore, in the case where the bearing portion 2000 and the base 3000 collide, impact and noise may be reduced by the second buffer member d2.

[0360] At least a portion of the guide portion 2300 of the carrier 2000 is received in the receiving portion 3300 of the base 3000. To this end, the receiving portion 3300 of the base 3000 is provided with an accommodating space in which the guide portion 2300 of the carrier 2000 is disposed.

[0361] The third guide groove g6 is provided in the guide portion 2300 of the bearing 2000 and the receiving portion 3300 of the base 3000, respectively, and the third ball member B6 is provided in the third guide groove g6. The third guide groove g6 has a shape having a length in the optical axis (Z axis) direction.

[0362] The third ball member B6 includes a plurality of balls arranged in the optical axis (Z axis) direction. When the bearing portion 2000 moves in the optical axis (Z axis) direction, the plurality of balls can roll in the optical axis (Z axis) direction.

[0363] The third guide groove g6 includes a first groove g61, a second groove g62, a third groove g63 and a fourth groove g64. The guide portion 2300 of the bearing portion 2000 is provided with the first groove g61 and the second groove g62, and the receiving portion 3300 of the base 3000 is provided with the third groove g63 and the fourth groove g64. Each groove is formed to extend to have a length in the optical axis (Z axis) direction.

[0364] The first groove g61 and the third groove g63 are arranged to face each other in a direction perpendicular to the optical axis (Z axis) direction, and a portion of multiple balls of the third ball member B6 (for example, the first ball group BG1 to be described later) is formed in the space between the first groove g61 and the third groove g63.

[0365] In addition, the second groove g62 and the fourth groove g64 are arranged to face each other in a direction perpendicular to the optical axis (Z axis) direction, and the remaining portions of the plurality of balls of the third ball member B6 (for example, the second ball group BG2 to be described later) are arranged in the space between the second groove g62 and the fourth groove g64.

[0366] The first groove g61, the third groove g63 and the fourth groove g64 have approximately a "∨" shape in a cross section cut on a plane perpendicular to the optical axis (Z-axis) direction, and the second groove g62 has approximately shape.

[0367] Therefore, the first ball group BG1 of the third ball member B6 can contact the first groove g61 at two points and can contact the third groove g63 at two points. In addition, the second ball group BG2 of the third ball member B6 can contact the second groove g62 at one point and the fourth groove g64 at two points.

[0368] For example, the first ball group BG1 of the third ball member B6 may make four-point contact with the opposing first and third grooves g61 and g63, and the second ball group BG2 of the third ball member B6 may make three-point contact with the opposing second and fourth grooves g62 and g64.

[0369] When the bearing part 2000 moves in the optical axis (Z axis) direction, the first ball group BG1, the first groove g61 and the third groove g63 of the third ball member B6 can be used as a main guide. In addition, the second ball group BG2, the second groove g62 and the fourth groove g64 of the third ball member B6 can be used as an auxiliary guide.

[0370] The first magnetic body 2500 is disposed on the guide portion 2300 of the carrier 2000, and the second magnetic body 3500 is disposed on the receiving portion 3300 of the base 3000. When the guide portion 2300 of the carrier 2000 is disposed in the receiving portion 3300 of the base 3000, the first magnetic body 2500 and the second magnetic body 3500 face each other.

[0371] The first magnetic body 2500 and the second magnetic body 3500 may generate an attractive force between each other. For example, the attractive force acts between the first magnetic body 2500 and the second magnetic body 3500 in a direction perpendicular to the optical axis (Z axis).

[0372] One of the first magnetic body 2500 and the second magnetic body 3500 may be a magnet, and the other may be a yoke. In another example, both the first magnetic body 2500 and the second magnetic body 3500 may be provided as magnets.

[0373] Due to the attractive force of the first magnetic body 2500 and the second magnetic body 3500 , the third ball member B6 may be in contact with the bearing portion 2000 and the base 3000 , respectively.

[0374] The third ball member B6 includes a first ball group BG1 and a second ball group BG2, and each of the first ball group BG1 and the second ball group BG2 includes a plurality of balls arranged in the optical axis (Z-axis) direction.

[0375] The first ball group BG1 and the second ball group BG2 are spaced apart from each other in a direction perpendicular to the optical axis (Z axis) (eg, Y axis direction). The number of balls in the first ball group BG1 and the number of balls in the second ball group BG2 may be different from each other (see Fig.23 ).

[0376] For example, the first ball group BG1 includes four or more balls arranged in the optical axis (Z axis) direction, and the second ball group BG2 includes three or more balls arranged in the optical axis (Z axis) direction.

[0377] However, the examples described herein are not limited to the number of balls belonging to each ball group, and the number of balls belonging to each ball group may be changed on the premise that the number of balls belonging to the first ball group BG1 is different from the number of balls belonging to the second ball group BG2. Hereinafter, for ease of description, an example will be described in which the first ball group BG1 includes four balls and the second ball group BG2 includes three balls.

[0378] Reference Fig.29 In the first ball group BG1, the two outermost balls in the optical axis (Z axis) direction have the same diameter, and the diameter of the ball between the two outermost balls may be smaller than the diameter of the ball disposed on the outermost side. For example, in the first ball group BG1, the two outermost balls in the optical axis (Z axis) direction have a first diameter, and the two balls disposed between the two outermost balls have a second diameter, and the first diameter is greater than the second diameter.

[0379] In addition, the diameters of two of the three balls of the second ball group BG2 are larger than the diameter of the remaining one ball. For example, in the second ball group BG2, two balls have the third diameter, one ball has the fourth diameter, and the third diameter is larger than the fourth diameter. In addition, the first diameter and the third diameter may be the same.

[0380] Reference Fig.29 , among the three balls of the second ball group BG2, two balls disposed on the upper side in the optical axis (Z axis) direction have the third diameter, and one ball disposed on the bottom side in the optical axis (Z axis) direction has the fourth diameter. As another example, one ball disposed on the uppermost side in the optical axis (Z axis) direction may have the fourth diameter, and the other two balls may have the third diameter. Furthermore, among the three balls of the second ball group BG2, two balls disposed on the outermost sides in the optical axis (Z axis) direction may have the third diameter, and one ball disposed between the two outermost balls may have the fourth diameter.

[0381] In this case, the same diameter may mean not only physically the same but also include manufacturing tolerances.

[0382] Therefore, the third ball member B6 may be in contact with the bearing portion 2000 and the base 3000 at least three points.

[0383] On the other hand, the distance between the centers of two balls having a first diameter among the plurality of balls of the first ball group BG1 is different from the distance between the centers of two balls having a third diameter among the plurality of balls of the second ball group BG2. For example, the distance between the centers of the two balls having the first diameter is greater than the distance between the centers of the two balls having the third diameter.

[0384] When the bearing part 2000 moves in the direction of the optical axis (Z axis), in order to make the bearing part 2000 move parallel to the direction of the optical axis (Z axis), for example, to prevent tilting, the center point CP of the attraction acting between the first magnetic body 2500 and the second magnetic body 3500 should be located within the supporting area A of the contact point connecting the bearing part 2000 (or the base 3000) and the third ball member B6.

[0385] When the center point CP where the attractive force acts deviates from the support area A, the position of the carrier 2000 is displaced during the movement of the carrier 2000, and there is a concern that tilting may occur. Therefore, it is necessary to form the support area A as wide as possible.

[0386] In this example, intentionally, the size (e.g., diameter) of a portion of the plurality of balls of the third ball member B6 is formed to be larger than the size (e.g., diameter) of the remaining balls. In this case, the balls having a relatively large size among the plurality of balls can intentionally contact the bearing portion 2000 or the base 3000.

[0387] Reference Fig.29 , among the plurality of balls of the first ball group BG1, the diameters of the two balls disposed on the outermost sides in the optical axis (Z axis) direction are larger than the diameters of the remaining balls, and therefore, the first ball group BG1 is in two-point contact with the carrier 2000 or the base 3000. In addition, since the diameters of two balls among the plurality of balls of the second ball group BG2 are larger than the diameters of the remaining balls, the second ball group BG2 is in two-point contact with the carrier 2000 or the base 3000.

[0388] Therefore, the third ball member B6 including the first ball group BG1 and the second ball group BG2 makes four-point contact with the bearing portion 2000 or the base 3000. In addition, the support area A connecting the contact points to each other may have a quadrilateral shape (eg, a trapezoidal shape).

[0389] Therefore, the support area A can be formed relatively widely, and thus the center point CP of the attractive force acting between the first magnetic body 2500 and the second magnetic body 3500 can be stably disposed in the support area A. Therefore, driving stability at the time of focus adjustment can be ensured.

[0390] On the other hand, even if some balls are manufactured to have the same diameter, the actual size of the balls may be different due to manufacturing errors. For example, one of the first ball group BG1 and the second ball group BG2 may contact the bearing portion 2000 or the base 3000 at two points, while the other may contact the bearing portion 2000 or the base 3000 at one point. In this case, the support area A connecting the contact points may have the same Fig.29 Different triangle shapes.

[0391] The first magnetic body 2500 and the second magnetic body 3500 may be respectively arranged closer to the main guide (e.g., the first groove g61 and the third groove g63) than the auxiliary guide (e.g., the second groove g62 and the fourth groove g64). For example, when viewed in the first axis (X axis) direction, the center point CP of the attraction generated between the first magnetic body 2500 and the second magnetic body 3500 is arranged closer to the main guide than the auxiliary guide.

[0392] Since the support area A has a longer length in the optical axis (Z axis) direction because it is closer to the main guide, the center point CP of the attraction can be located within the support area A by setting the first magnetic body 2500 and the second magnetic body 3500 closer to the main guide.

[0393] On the other hand, during focus adjustment, the plurality of balls of the first ball group BG1 and the plurality of balls of the second ball group BG2 roll in the optical axis (Z axis) direction. Therefore, the size of the support area A may change according to the movement of the balls belonging to each ball group. In this case, there is a concern that the center point CP of the attractive force may deviate from the support area A unexpectedly during driving.

[0394] In this example, the first protrusion 3310 and the second protrusion 3330 protruding toward the third ball member B6 may be provided in the receiving portion 3300 of the base 3000. For example, the first protrusion 3310 is provided in the third groove g63 as a main guide, and the second protrusion 3330 is provided in the fourth groove g64 as an auxiliary guide.

[0395] In this case, the first protrusion 3310 and the second protrusion 3330 have different lengths in the optical axis (Z axis) direction. For example, the length of the second protrusion 3330 in the optical axis (Z axis) direction is longer than the length of the first protrusion 3310 in the optical axis (Z axis) direction.

[0396] In addition, the length of the third groove g63 used as a main guide in the optical axis (Z axis) direction is different from the length of the fourth groove g64 used as an auxiliary guide in the optical axis (Z axis) direction. For example, the length of the third groove g63 in the optical axis (Z axis) direction is greater than the length of the fourth groove g64 in the optical axis (Z axis) direction.

[0397] Therefore, in this example, the number of the plurality of balls belonging to the first ball group BG1 and the number of the plurality of balls belonging to the second ball group BG2 are configured differently, and the lengths of the spaces accommodating the respective ball groups in the optical axis (Z axis) direction are formed differently. Therefore, the size of the support area A can be prevented from changing, or even in the case where the size of the support area A changes, the center point CP of the attractive force can be prevented from deviating from the support area A.

[0398] Reference Fig.23 , the actuator 2 according to this example includes a second driving unit 7000. The second driving unit 7000 may generate a driving force in the optical axis (Z axis) direction to move the carrier 2000 in the optical axis (Z axis) direction.

[0399] The second driving unit 7000 includes a third magnet 7100 and a third coil 7300. The third magnet 7100 and the third coil 7300 may be disposed to face each other in the optical axis (Z-axis) direction.

[0400] The third magnet 7100 is disposed on the carrier 2000. For example, the third magnet 7100 may be disposed on at least one of the upper surface and the lower surface of the carrier 2000. The third magnet 7100 may be disposed on at least one of the upper surface and the lower surface of the guide portion 2300 of the carrier 2000. The upper surface of the carrier 2000 may be a surface facing the upper surface of the housing 5000, and the lower surface of the carrier 2000 may refer to a surface facing the cover 5300.

[0401] The third back yoke 7500 may be disposed between the carrier 2000 and the third magnet 7100. The third back yoke 7500 may improve driving force by preventing magnetic flux of the third magnet 7100 from leaking.

[0402] Reference Fig.23 , the third magnet 7100 includes two magnets, and the two magnets may be respectively disposed on the upper surface and the lower surface of the carrier 2000. In addition, the third coil 7300 includes two coils facing the two magnets in the optical axis (Z axis) direction.

[0403] Since the third magnet 7100 and the third coil 7300 face in the optical axis (Z axis) direction, when the third magnet 7100 moves in the optical axis (Z axis) direction, the spacing distance between the third magnet 7100 and the third coil 7300 in the optical axis (Z axis) direction can change.

[0404] In this example, when the spacing distance between the third magnet 7100 and the third coil 7300 disposed on the upper surface side of the carrier 2000 decreases, the spacing distance between the third magnet 7100 and the third coil 7300 disposed on the lower surface side of the carrier 2000 increases.

[0405] Therefore, since the spacing distance between the third magnet 7100 and the third coil 7300 may be compensated, the magnitude of the driving force of the second driving unit 7000 may be prevented from being varied according to the movement of the carrier 2000 .

[0406] However, the third magnet 7100 may also be disposed on one of the upper surface and the lower surface of the carrier 2000 according to the moving distance of the carrier 2000 required for focus adjustment.

[0407] The third magnet 7100 may be a monopole magnet magnetized so that the N pole and the S pole are arranged in the optical axis (Z axis) direction. For example, the surface of the third magnet 7100 facing the third coil 7300 may have an S pole, and the opposite surface thereof may have an N pole. In this case, the N pole and the S pole may be magnetized relative to each other. A neutral region is formed between the N pole and the S pole.

[0408] The third coil 7300 is disposed to face the third magnet 7100. For example, the third coil 7300 may be disposed to face the third magnet 7100 in the optical axis (Z-axis) direction.

[0409] When the third coil 7300 includes two coils, one coil is disposed on the first substrate 8100, and the other coil is disposed on the second substrate 8300. The second substrate 8300 is mounted on the cover 5300 so that the third magnet 7100 and the third coil 7300 face each other in the optical axis (Z axis) direction.

[0410] The third magnet 7100 is a moving member mounted on the carrier 2000 and moves in the optical axis (Z axis) direction together with the carrier 2000 , and the third coil 7300 is a fixed member fixed to the first substrate 8100 and / or the second substrate 8300 .

[0411] When power is applied to the third coil 7300 , the carrier 2000 may move in the optical axis (Z-axis) direction by the electromagnetic force between the third magnet 7100 and the third coil 7300 .

[0412] Since the image sensor S is disposed on the carrier 2000 , the image sensor S also moves in the optical axis (Z-axis) direction by the movement of the carrier 2000 .

[0413] Fig.30 is a modified example of the position of the third magnet 7100 . Fig.30 The example shown is similar to the example shown in FIG. Fig.23 The examples shown are different.

[0414] Reference Fig.30 , one of the two magnets included in the third magnet 7100 may be disposed on a remaining portion of the lower surface of the carrier 2000 excluding a portion where the guide portion 2300 is disposed.

[0415] Reference Fig.23 and Fig.30, the third magnet 7100 can be set at any position on the lower surface of the carrying portion 2000.

[0416] Since the third magnet 7100 can be set at any position on the lower surface of the carrier 2000, at least a portion of the third magnet 7100 can be set to overlap with the first magnet 6110 or the second magnet 6310 in the optical axis (Z axis) direction according to the position of the third magnet 7100.

[0417] exist Fig.30 In the example shown, the first magnet 6110 is disposed at a position overlapping with the third magnet 7100 in the optical axis (Z-axis) direction.

[0418] In this case, since the magnetic field of the first magnet 6110 may affect the third coil 7300, or the magnetic field of the third magnet 7100 may affect the first coil 6130, a yoke may be provided between the first magnet 6110 and the third magnet 7100. The yoke may be provided on at least one of the upper surface of the carrier 2000, the lower surface of the carrier 2000, and the lower surface of the base 3000. The yoke may be formed of a magnetic metal material.

[0419] The actuator 2 according to this example can sense the position of the carrier 2000 in the optical axis (Z-axis) direction.

[0420] To this end, a second position sensing unit 7700 (see Fig.23 and Fig.28 ). The second position sensing unit 7700 includes a sensing magnet 7710 and a third position sensor 7730. The sensing magnet 7710 is disposed on the lower surface of the carrier 2000, and the third position sensor 7730 is arranged on the second substrate 8300 to face the sensing magnet 7710. The third position sensor 7730 may be a Hall sensor.

[0421] exist Fig.23 In the illustrated example, the second position sensing unit 7700 includes a sensing magnet 7710 and a third position sensor 7730 , but the third position sensor 7730 may also be disposed to face the third magnet 7100 without providing a separate sensing magnet 7710 .

[0422] Alternatively, the second position sensing unit 7700 may include a sensing magnet 7710 and a sensing coil. For example, the sensing coil may be provided on the second substrate 8300 to face the sensing magnet 7710. The inductance of the sensing coil changes according to the change in the distance between the sensing magnet 7710 and the sensing coil in the optical axis (Z axis) direction, and thus the position of the carrier 2000 may be detected.

[0423] Alternatively, instead of providing a separate sensing magnet and a sensing coil, the third coil 7300 may be used as the second position sensing unit 7700 .

[0424] For example, the position of the carrier 2000 may be sensed by a change in the inductance of the third coil 7300 .

[0425] For example, when the carrier 2000 moves, the third magnet 7100 also moves, and thus, the inductance of the third coil 7300 changes. Therefore, the position of the carrier 2000 can be sensed by the change in the inductance of the third coil 7300.

[0426] The cover 5300 is coupled to the housing 5000 to cover at least a portion of the lower surface of the carrier 2000 .

[0427] Therefore, the cover 5300 may serve as a stopper that prevents the carrier 2000 from being separated to the outside of the cover 5300 .

[0428] In addition, the cover 5300 may cover the lower surface of the guide portion 2300 of the bearing 2000 to prevent the third ball member B6 from being separated.

[0429] The third buffer member d3 having elasticity may be provided on at least one of the surfaces of the main body portion 2100 of the carrier 2000 and the cover 5300 (or the second substrate 8300) facing each other in the optical axis (Z axis) direction. Fig.26 , the third buffer member d3 may be disposed on the lower surface of the main body portion 2100 of the bearing portion 2000. The third buffer member d3 may be disposed to be spaced apart from each other at at least three locations in the lower surface of the main body portion 2100 of the bearing portion 2000. The third buffer member d3 may be formed of a material having elastic properties. For example, the third buffer member d3 may be formed of a rubber material.

[0430] Therefore, when the carrier 2000 and the cover 5300 (or the second substrate 8300 ) collide, impact and noise may be reduced by the third buffer member d3 .

[0431] The carrier 2000 can move in the optical axis (Z axis) direction relative to the base 3000. In addition, the carrier 2000 can move together with the base 3000 in a direction perpendicular to the optical axis (Z axis).

[0432] The image sensor S is electrically connected to the first substrate 8100 and / or the second substrate 8300. For example, the image sensor S may be electrically connected to the first substrate 8100 and / or the second substrate 8300 through a connection portion.

[0433] Since the image sensor S may move in three axial directions, a connection portion connecting the image sensor S and the first substrate 8100 and / or the second substrate 8300 may be configured to be flexible.

[0434] For example, the connection portion may be in the form of a flexible film in which a conductor is patterned, or may be in the form of a plurality of cables. Therefore, when the image sensor S moves, the connection portion may bend.

[0435] In another example, a third substrate connected to the image sensor S may be provided. The third substrate has a flexible connection portion through which the image sensor S and the third substrate may be connected. The connection portion may be in the form of a flexible film in which a conductor is patterned or may be in the form of a plurality of cables.

[0436] Reference Figures 14 to 30 , the camera module 30 can perform auto focus (AF) and optical image stabilization (OIS) by moving the image sensor S instead of the lens module 1000. For example, the image sensor S can be moved in the optical axis (Z axis) direction together with the carrier 2000 to adjust the focus. In addition, the image sensor S can be moved in a direction perpendicular to the optical axis (Z axis) together with the carrier 2000 to correct camera shake during shooting.

[0437] As another example, refer to Fig.31 , the lens barrel 1100 may be coupled to the carrier 2000. Therefore, the lens barrel 1100 may move in the optical axis (Z axis) direction together with the carrier 2000 to adjust the focus. In addition, the lens barrel 1100 may move in a direction perpendicular to the optical axis (Z axis) together with the carrier 2000 to correct camera shake during shooting.

[0438] The image sensor S is disposed on the second substrate 8300, and the second substrate 8300 is mounted on the cover 5300. Then, the cover 5300 is coupled to the housing 5000. In this case, the image sensor S is a fixed member that does not move during auto focus (AF) and optical image stabilization (OIS).

[0439] The cover 5300 is provided with a protrusion 5310 protruding in the optical axis (Z axis) direction, and the protrusion 5310 may be provided at a position facing the third ball member B3 in the optical axis (Z axis) direction. Therefore, the third ball member B6 may be prevented from being separated by the protrusion 5310. For reference, a hole through which the protrusion 5310 passes may be provided in the second substrate 8300.

[0440] Fig.32 is a schematic exploded perspective view of a camera module according to another example, and Fig.33is an exploded perspective view of a housing and a base of a camera module according to another example.

[0441] and Figures 14 to 30 Compared to the example shown, Fig.32 and Fig.33 The actuator 3 and the camera module 40 shown in FIG. 1 are different in configuration for guiding the movement of the base 3000 .

[0442] Reference Fig.32 and Fig.33 , the base 3000 is disposed in the housing 5000. Figures 17 to 30 Unlike the example shown, the guide member 4000 is not provided between the housing 5000 and the base 3000. In addition, since the guide member 4000 is not provided, the ball member (in the case of the guide member 4000) provided between the guide member 4000 and the housing 5000 is not provided. Figures 17 to 30 first ball member in the example shown).

[0443] The base 3000 may be configured to be movable in the housing 5000 in a first axis (X axis) direction and a second axis (Y axis) direction.

[0444] The first ball member B4 is disposed between the housing 5000 and the base 3000. The first ball member B4 is disposed to contact the housing 5000 and the base 3000, respectively.

[0445] The first ball member B4 serves to guide the base 3000 to move in two axial directions during camera shake compensation, and further, serves to maintain a gap between the housing 5000 and the base 3000 .

[0446] The first ball member B4 may guide the movement of the base 3000 in the first axis (X axis) direction and the movement of the base 3000 in the second axis (Y axis) direction.

[0447] For example, when a driving force is generated in the first axis (X axis) direction, the first ball member B4 rolls in the first axis (X axis) direction. Therefore, the first ball member B4 guides the movement of the base 3000 in the first axis (X axis) direction.

[0448] In addition, when a driving force is generated in the second axis (Y axis) direction, the first ball member B4 rolls in the second axis (Y axis) direction. Therefore, the first ball member B4 guides the movement of the base 3000 in the second axis (Y axis) direction.

[0449] The first ball member B4 includes a plurality of balls disposed between the housing 5000 and the base 3000 .

[0450] The first guide groove g4' in which the first ball member B4 is provided is provided in at least one of the surfaces facing each other in the optical axis (Z axis) direction of the housing 5000 and the base 3000. The first guide groove g4' is provided in plurality to correspond to the plurality of balls of the first ball member B4.

[0451] The first ball member B4 is disposed in the first guide groove g4' and assembled between the housing 5000 and the base 3000. In the state of being accommodated in the first guide groove g4', the movement of the first ball member B4 in the optical axis (Z axis) direction can be restricted, and the first axis (X axis) direction and the second axis (Y axis) direction can be moved. For example, the first ball member B4 can perform rolling motion in the first axis (X axis) direction and the second axis (Y axis) direction.

[0452] The first guide groove g4' may be configured to have a circular cross-sectional shape cut in a plane perpendicular to the optical axis (Z-axis) direction.

[0453] The first magnet 6110 and the second magnet 6310 of the first driving unit 6000 are mounted on the base 3000 .

[0454] and Figures 17 to 30 Unlike the example shown, Fig.32 and Fig.33 In the illustrated example, the guide member 4000 is not provided between the housing 5000 and the base 3000 , and thus, the heights of the actuator 3 and the camera module 40 can be further reduced.

[0455] Fig.34 is a schematic exploded perspective view of a camera module according to another example, Fig.35 is a plan view of a first driving unit of a camera module according to another example, and Fig.36 and Fig.37 Shows Fig.35 's modified example.

[0456] Figure 34 to Figure 36 The actuator 4 and camera module 50 shown are Fig.32 and Fig.33 The illustrated examples differ in the configuration of the first drive unit 6000 ′.

[0457] First refer to Fig.32 and Fig.33 In the example shown, the first driving unit 6000 includes a first sub driving unit 6100 and a second sub driving unit 6300. The first sub driving unit 6100 includes a first magnet 6110 and a first coil 6130, and the second sub driving unit 6300 includes a second magnet 6310 and a second coil 6330.

[0458] Furthermore, the first guide groove g4' in which the first ball member B4 is disposed is configured to have a circular cross-sectional shape cut in a plane perpendicular to the optical axis (Z axis) direction. The first ball member B4 can roll in the first guide groove g4' in a direction perpendicular to the optical axis (Z axis) direction.

[0459] Therefore, in the process of generating a driving force in the first axis (X axis) direction or the second axis (Y axis) direction, if an unintentional deviation occurs in the driving force, there is a possibility that a rotational force with the optical axis (Z axis) as the rotation axis acts on the base 3000.

[0460] exist Fig.32 and Fig.33 In the case of the example shown, it may be difficult to prevent the generation of such a rotational force or to generate a driving force capable of counteracting the rotational force.

[0461] However, in Figure 34 to Figure 36 In the case of the illustrated example, the first driving unit 6000 ′ is configured to additionally generate a driving force that counteracts the rotational force.

[0462] Reference Figure 34 to Figure 36 , the first driving unit 6000' includes a first sub driving unit 6100' and a second sub driving unit 6300'. The first sub driving unit 6100' may include a first magnet 6110 and a first coil unit 6130', and the second sub driving unit 6300' may include a second magnet 6310 and a second coil unit 6330'.

[0463] At least one of the first coil unit 6130' and the second coil unit 6330' may include two coils.

[0464] For example, the first coil unit 6130 ′ may include a first sub-coil 6131 and a second sub-coil 6133 , and the second coil unit 6330 ′ may include a third sub-coil 6331 and a fourth sub-coil 6333 .

[0465] The first sub coil 6131 and the second sub coil 6133 are disposed to face the first magnet 6110 in the optical axis (Z axis) direction, respectively. In addition, the first sub coil 6131 and the second sub coil 6133 are spaced apart from each other in the longitudinal direction of the first magnet 6110.

[0466] The third sub coil 6331 and the fourth sub coil 6333 are disposed to face the second magnet 6310 in the optical axis (Z axis) direction, respectively. In addition, the third sub coil 6331 and the fourth sub coil 6333 are spaced apart from each other in the longitudinal direction of the second magnet 6310.

[0467] Fig.34 and Fig.35The example in which the first coil unit 6130' and the second coil unit 6330' each include two coils is shown, but Fig.36 As shown, one of the first coil unit 6130' and the second coil unit 6330' may include two coils, and the other may include one coil.

[0468] The first position sensing unit 6500 ′ includes at least three position sensors. When three position sensors are provided, one position sensor is provided to face one of the first magnet 6110 and the second magnet 6310 , and the other two position sensors are provided to face the other of the first magnet 6110 and the second magnet 6310 .

[0469] For example, refer to Fig.35 , the first position sensing unit 6500 ′ includes a first position sensor 6510 , a second position sensor 6530 , and a third position sensor 6550 .

[0470] The first position sensor 6510 is disposed to face the first magnet 6110 in the optical axis (Z axis) direction, and the second position sensor 6530 and the third position sensor 6550 are disposed to face the second magnet 6310 in the optical axis (Z axis) direction, respectively. The second position sensor 6530 and the third position sensor 6550 may be spaced apart from each other in the longitudinal direction of the second magnet 6310.

[0471] When the base 3000 is rotated by a rotation force with the optical axis (Z axis) as a rotation axis, the second magnet 6310 provided on the base 3000 also rotates together with the base 3000. Since the second magnet 6310 faces the second position sensor 6530 and the third position sensor 6550 spaced apart from each other, whether the base 3000 is rotated is determined by the second position sensor 6530 and the third position sensor 6550. In addition, the position of the rotating base 3000 can be detected.

[0472] Reference Fig.35 , the first sub driving unit 6100' includes two coils, and the second sub driving unit 6300' includes two coils. Therefore, the two coils and the first magnet 6110 of the first sub driving unit 6100' interact with the two coils and the second magnet 6310 of the second sub driving unit 6300' to generate a driving force that counteracts the rotational force.

[0473] Reference Fig.37 , the first sub driving unit 6100 ′ may include two coils, the second sub driving unit 6300 ′ may include two coils, and the first position sensing unit 6500 ′ may include four position sensors.

[0474] For example, the first position sensing unit 6500 ′ includes a first position sensor 6510 , a second position sensor 6530 , a third position sensor 6550 , and a fourth position sensor 6570 .

[0475] The first position sensor 6510 and the second position sensor 6530 are disposed to face the first magnet 6110 in the optical axis (Z axis) direction, respectively, and the third position sensor 6550 and the fourth position sensor 6570 are disposed to face the second magnet 6310 in the optical axis (Z axis) direction, respectively. The first position sensor 6510 and the second position sensor 6530 may be spaced apart in the longitudinal direction of the first magnet 6110, and the third position sensor 6550 and the fourth position sensor 6570 may be spaced apart from each other in the longitudinal direction of the second magnet 6310.

[0476] Whether the base 3000 rotates may be detected by four position sensors and the position of the rotating base 3000 may be sensed, and a rotational force acting on the base 3000 may be offset by the first sub driving unit 6100 ′ and the second sub driving unit 6300 ′.

[0477] As described above, an actuator for a camera and a camera module including the same according to one or more examples may improve optical image stabilization.

[0478] Although specific examples have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail may be made to these examples without departing from the spirit and scope of the claims and their equivalents. The examples described in this application should be understood in a descriptive sense only, and not for limiting purposes. The description of the features or aspects in each example should be understood to be applicable to similar features or aspects in other examples. If the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices, or circuits are combined in different ways and / or replaced or supplemented by other components or their equivalents, appropriate results can still be achieved. Therefore, the scope of the present disclosure is not limited by specific embodiments, but by the claims and their equivalents, and all variations within the scope of the claims and their equivalents should be understood to be included in the present disclosure.

Claims

1. An actuator for a camera, comprising: a housing including an open interior space; a guide member, a base, and a bearing portion stacked in the housing in the optical axis direction; a first driving unit configured to generate a driving force in a first axial direction perpendicular to the optical axis direction and in a second axial direction perpendicular to both the optical axis direction and the first axial direction, the first driving unit comprising a plurality of magnets and a plurality of coils; as well as a second driving unit configured to generate a driving force in the optical axis direction and including a magnet and a coil, wherein at least a portion of the bearing portion is accommodated in the base, wherein the bearing portion, the base and the guide member are configured to be movable together in the first axial direction, wherein the bearing portion and the base are configured to be movable together in the second axial direction, The bearing portion is configured to be movable relative to the base in the direction of the optical axis. wherein the plurality of magnets and the plurality of coils of the first driving unit are arranged to face each other in the optical axis direction, and Wherein, the magnet and the coil of the second driving unit are arranged to face each other in the optical axis direction.

2. The actuator for a camera according to claim 1, wherein: The first driving unit comprises: a first sub-driving unit including a first magnet and a first coil facing the first magnet in the optical axis direction; and a second sub-driving unit including a second magnet and a second coil facing the second magnet in the direction of the optical axis, Wherein, the first magnet is mounted on the guide member, and the second magnet is mounted on the base.

3. The actuator for a camera according to claim 2, wherein: The guide member includes a mounting groove in which the first magnet is disposed and an escape hole to receive the second magnet.

4. The actuator for a camera according to claim 2, wherein: A first substrate is mounted on the housing. wherein the first coil and the second coil are arranged on one surface of the first substrate, and Wherein, on the other surface of the first substrate, a first yoke is arranged at a position facing the first magnet, and a second yoke is arranged at a position facing the second magnet.

5. The actuator for a camera according to claim 1, wherein: A first ball member capable of rolling motion in the first axial direction is provided between the guide member and the housing, and a second ball member capable of rolling motion in the second axial direction is provided between the guide member and the base.

6. The actuator for a camera according to claim 5, wherein: at least one of surfaces of the guide member and the housing facing each other in the optical axis direction includes a first guide groove in which the first ball member is disposed, and Here, at least one of surfaces of the guide member and the base facing each other in the optical axis direction includes a second guide groove, and the second ball member is disposed in the second guide groove.

7. The actuator for a camera according to claim 1, wherein: The magnet of the second driving unit is mounted on the bearing portion.

8. The actuator for a camera according to claim 7, wherein: A first substrate is mounted on the housing. wherein the magnet of the second driving unit includes at least two magnets, and the coil of the second driving unit includes at least two coils, Wherein, the at least two magnets are respectively arranged on the upper surface and the lower surface of the bearing part, and Among them, one coil of the at least two coils is arranged on the first substrate, and the other coil is arranged on a second substrate, and the second substrate is arranged at a position spaced apart from the first substrate in the optical axis direction.

9. The actuator for a camera according to claim 1, wherein: The bearing portion includes a main body portion and a guide portion extending from one side of the main body portion in the optical axis direction. wherein the base includes a placement portion facing the main body portion in the optical axis direction and a receiving portion extending from one side of the placement portion in the optical axis direction, and Wherein, at least a portion of the guide portion is accommodated in the accommodation space in the receiving portion.

10. The actuator for a camera according to claim 9, wherein: a third ball member is disposed between the guide portion and the receiving portion, and Among them, the third guide groove provided with the third ball member is respectively provided in the surfaces of the guide portion and the receiving portion facing each other in the direction perpendicular to the optical axis direction.

11. The actuator for a camera according to claim 10, wherein: The third ball member includes a first ball group that contacts the third guide groove at four points and a second ball group that contacts the third guide groove at three points.

12. The actuator for a camera according to claim 11, wherein: The number of the plurality of balls belonging to the first ball group is greater than the number of the plurality of balls belonging to the second ball group.

13. The actuator for a camera according to claim 11, wherein: A first magnetic body is disposed in the guide portion, a second magnetic body is disposed in the receiving portion, and an attractive force is generated between the first magnetic body and the second magnetic body in a direction perpendicular to the optical axis direction, Wherein, the first magnetic body and the second magnetic body are arranged closer to the first ball group than to the second ball group. 14 . The actuator for a camera according to claim 1 , further comprising an image sensor disposed on the carrying portion.

15. Camera module, including: A housing having an open interior space; A lens module is fixedly disposed in the internal space; A base and a bearing portion stacked in the housing in the direction of the optical axis; a first driving unit configured to generate a driving force in a first axial direction perpendicular to the optical axis direction and in a second axial direction perpendicular to both the optical axis direction and the first axial direction, the first driving unit comprising a plurality of magnets and a plurality of coils; as well as a second driving unit configured to generate a driving force in the optical axis direction and including a magnet and a coil, Wherein, the image sensor is arranged on the carrying part, wherein at least a portion of the bearing portion is accommodated in the base, wherein the bearing portion and the base are configured to be movable together in the first axial direction and the second axial direction, The bearing portion is configured to be movable relative to the base in the direction of the optical axis. wherein the plurality of magnets and the plurality of coils of the first driving unit are arranged to face each other in the optical axis direction, and Wherein, the magnet and the coil of the second driving unit are arranged to face each other in the optical axis direction.

16. The camera module according to claim 15, wherein: The first driving unit comprises: A first sub-driving unit includes a first magnet and a first coil facing the first magnet in the direction of the optical axis; a second sub-driving unit including a second magnet and a second coil facing the second magnet in the optical axis direction; and a first position sensing unit, facing the first magnet and the second magnet, Wherein, the first magnet and the second magnet are mounted on the base, wherein at least one of the first coil and the second coil comprises two coils, and Wherein, the first position sensing unit includes at least three position sensors.

17. An actuator for a camera, comprising: A carrier and a base stacked in a housing in the direction of an optical axis, wherein the housing has an open inner space; a first driving unit configured to drive the base and the carrying portion in a first direction perpendicular to the optical axis direction and in a second direction perpendicular to the first direction and the optical axis direction; and a second driving unit configured to drive the bearing portion relative to the base in the direction of the optical axis, wherein at least a portion of the bearing portion is accommodated in the base, and Wherein, one or more of the first driving unit and the second driving unit includes a magnet facing the coil in the optical axis direction.

18. The actuator for a camera according to claim 17, further comprising a guide member, in, The movement of the guide member in the second direction is restricted, wherein the base is stacked on the guide member, and Wherein, the first driving unit is configured to drive the guiding member in the first direction so as to drive the base and the bearing portion in the first direction.

19. The actuator for a camera according to claim 17, wherein: The first driving unit comprises: A first sub-driving unit includes a first magnet and a first coil facing the first magnet in the direction of the optical axis; a second sub-driving unit including a second magnet and a second coil facing the second magnet in the optical axis direction; and a first position sensing unit, facing the first magnet and the second magnet, Wherein, the first magnet and the second magnet are mounted on the base, wherein at least one of the first coil and the second coil comprises two coils, and Wherein, the first position sensing unit includes at least three position sensors.

20. Camera module, including: An actuator for a camera according to claim 17; as well as an image sensor and a lens barrel, wherein one of the image sensor and the lens barrel is disposed on the carrying portion, and the other of the image sensor and the lens barrel is fixedly disposed on the housing, Wherein, the lens barrel includes one or more lenses arranged in the direction of the optical axis, and Wherein, the image sensor is configured to receive light emitted from the lens barrel.

Images