Reflection module and camera module

Abstract

The utility model relates to a reflective module and a camera module. The reflection module includes: a first lens module having a first optical axis; a holder on which a reflective member is disposed to reflect light passing through the first lens module; a guide member on which the holder is provided; a housing accommodating the holder and the guide member; and a first ball member disposed between the guide member and the housing and including a first ball group and a second ball group spaced apart in a direction of the first rotation axis. The first lens module and the holder are configured to rotate together about a first rotation axis and a second rotation axis that are perpendicular to each other and perpendicular to the first optical axis. The guide member is configured to rotate together with the first lens module and the holder about a first rotation axis.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Korean Patent Application No. 10-2023-0151180 filed on November 3, 2023, and Korean Patent Application No. 10-2024-0038725 filed on March 20, 2024, both in the Korean Intellectual Property Office, the disclosures of which are hereby incorporated by reference for all purposes. Technical Field

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

[0004] Camera modules may include a reflective member that bends the incident light path through the lens module. Because the diameter of the lens in the lens module affects the thickness of the mobile device, this type of camera module may have limitations in increasing the diameter of the lens. Consequently, it may be difficult to reduce the F-number of the camera module.

[0005] Therefore, a structure has been proposed in which some of the lenses are provided in front of the reflecting member.

[0006] The camera module also includes a shake correction function that corrects for camera shake during shooting to improve resolution. This shake correction function can be achieved by rotating the reflective member in two axes. In this case, the two-axis rotation can be achieved through pitch and yaw rotation. When the lens is positioned in front of the reflective member, the lens can rotate along with the reflective member.

[0007] Here, the pitch rotation axis and the yaw rotation axis mean two axes that are perpendicular to the optical axis of the lens provided behind the reflective member and are perpendicular to each other.

[0008] For example, rotation based on the yaw axis can be achieved by rotating the reflective member using the direction in which light is incident on the reflective member as the rotation axis, and rotation based on the pitch axis can be achieved by rotating the yaw axis and a lens disposed behind the reflective member. It can also be achieved by rotating the reflective member using an axis perpendicular to the optical axis as the rotation axis.

[0009] Here, when the reflecting member rotates in a yaw manner, an error may occur in a change in the expected optical path length.

[0010] The reason is that, in the case of the yaw direction rotation in the two-axis rotation, the apparent position change of the lens provided in front of the reflection member before and after the yaw direction rotation may not be noticeable.

[0011] Therefore, when correcting shake in the yaw direction, there may be a problem that large aberration may occur, and resolution may deteriorate.

[0012] The above information is presented as background information only to assist in understanding the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above content may be applicable as prior art with respect to the present disclosure. Utility Model Content

[0013] This summary is provided to introduce a selection of concepts in a simplified form that are further described in the following detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[0014] In one general aspect, a reflection module includes: a first lens module having a first optical axis; a holder on which a reflective member is disposed to reflect light passing through the first lens module; a guide member on which the holder is disposed; a housing that houses the holder and the guide member; and a first ball member disposed between the guide member and the housing and comprising a first ball group and a second ball group spaced apart in the direction of a first rotation axis. The first lens module and the holder are configured to rotate together about first and second rotation axes, the first and second rotation axes being perpendicular to each other and to the first optical axis. The guide member is configured to rotate together with the first lens module and the holder about the first rotation axis. The first ball group comprises a plurality of balls arranged in the direction of the second rotation axis.

[0015] A first guide groove and a second guide groove may be provided on surfaces of the guide member and the housing that face each other in the direction of the first optical axis. The first ball group may be provided in the first guide groove, and the second ball group may be provided in the second guide groove. Each of the first guide groove and the second guide groove may have a curved profile.

[0016] Each of the first guide groove and the second guide groove may have a rolling channel for the first ball group or the second ball group. A curvature radius of the rolling channel may be equal to a distance between the first rotation axis and the rolling channel in the direction of the first optical axis.

[0017] Among the plurality of balls in the first ball group, two balls disposed outermost in the direction of the second rotation axis may have a diameter greater than a diameter of a ball disposed between the two balls.

[0018] The two balls may be in two-point contact with the guide member and may be in two-point contact with the housing.

[0019] The second ball set may include a smaller number of balls than the number of the plurality of balls included in the first ball set.

[0020] The diameter of the middle ball of the first ball group may be smaller than the diameters of the other balls of the first ball group.

[0021] A first pulling magnet may be provided on one of the guide member and the housing, and a first pulling yoke may be provided on the other of the guide member and the housing. The first pulling magnet and the first pulling yoke may face each other in the direction of the first optical axis. The first pulling magnet may be provided between the first ball group and the second ball group.

[0022] The reflection module may further include a first drive unit including a first magnet disposed on the guide member and a first coil disposed facing the first magnet. The first magnet and the first coil may face each other in the direction of the first rotation axis. A surface of the first magnet facing the first coil may have an N pole, a neutral region, and an S pole along the first optical axis.

[0023] A virtual line extending the first rotation axis may pass through the one surface of the first magnet.

[0024] The first coil may include two coils spaced apart in the direction of the second rotation axis.

[0025] The reflection module may further include a second ball member disposed between the holder and the guide member. The second ball member may include a plurality of balls spaced apart in the direction of the second rotation axis.

[0026] A second pulling magnet may be provided on one of the retainer and the guide member, and a second pulling yoke may be provided on the other of the retainer and the guide member. The second pulling magnet and the second pulling yoke may face each other in the direction of the first optical axis. The second pulling magnet may be provided between the plurality of balls of the second ball member.

[0027] The reflection module may further include a second drive unit including a second magnet disposed on the holder and a second coil disposed to face the second magnet. A surface of the second magnet facing the second coil may have an N pole, a neutral region, and an S pole along the first optical axis. The second drive unit may be disposed to be spaced apart from the second ball member in the direction of the first rotation axis.

[0028] In another general aspect, a camera module includes: a guide member disposed in a housing to rotate about a first rotation axis; a holder disposed on the guide member to rotate relative to the guide member based on a second rotation axis perpendicular to the first rotation axis and having a reflection member; a first ball member disposed between the guide member and the housing and including a plurality of balls arranged to roll in a direction of the second rotation axis; a first lens module mounted on the holder and having a first optical axis perpendicular to both the first rotation axis and the second rotation axis; and a second lens module into which light reflected from the reflection member is incident.

[0029] A guide groove may be provided on surfaces of the guide member and the housing that face each other in the direction of the first optical axis. The guide groove may have a curved profile around the first rotation axis.

[0030] The camera module may further include: a first driving unit including a first magnet disposed on the guide member and a first coil disposed to face the first magnet in the direction of the first rotation axis; a second driving unit including a second magnet disposed on the retainer and a second coil disposed to face the second magnet; and a second ball member disposed between the retainer and the guide member and including a plurality of balls spaced apart in the direction of the second rotation axis.

[0031] The second drive unit may be disposed between the first drive unit and the second ball member in the direction of the first rotation axis. The second drive unit may include two magnets spaced apart in the direction of the second rotation axis and two coils spaced apart in the direction of the second rotation axis, and the first ball member may be disposed between the two magnets.

[0032] Other features and aspects will be apparent from the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a perspective view of a camera module according to an embodiment of the present disclosure.

[0034] Figure 2 is an exploded perspective view of a camera module according to an embodiment of the present disclosure.

[0035] Figure 3 is an exploded perspective view of a reflection module according to an embodiment of the present disclosure.

[0036] Figure 4 is a perspective view of a reflection module according to an embodiment of the present disclosure.

[0037] Figure 5 Looking in the other direction Figure 3 view.

[0038] Figure 6Looking in the other direction Figure 4 view.

[0039] Figure 7 is a schematic diagram showing a first ball member provided in a housing.

[0040] Figure 8 FIG. 1 is a diagram showing a reflection module that rotates about the second optical axis.

[0041] Figure 9 is a diagram showing a holder that rotates using a first shaft as a rotation axis.

[0042] Figure 10 is a perspective view illustrating a second lens module separated from a camera module according to an embodiment.

[0043] Figure 11 is a bottom stereoscopic view of the second lens module.

[0044] Figure 12 is a diagram illustrating a first stopper and a second stopper coupled to a housing.

[0045] Figure 13 is an exploded perspective view of a camera module according to another embodiment.

[0046] Throughout the drawings and detailed description, unless otherwise described, the same reference numerals refer to the same elements. For 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

[0047] Hereinafter, although examples of the present disclosure will be described in detail with reference to the accompanying drawings, it is noted that the examples are not limited thereto.

[0048] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices and / or systems described herein. However, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein, but may be changed as will be apparent after understanding the present disclosure, except for operations that must occur in a certain order. In addition, descriptions of features known in the art may be omitted for clarity and brevity.

[0049] The features described herein may be implemented in different forms and are not to be construed as limited to the examples described herein. Rather, the examples described herein are provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the present disclosure.

[0050] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” or “coupled to” another element, it may be directly “on,” directly “connected to,” or directly “coupled to” the other element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there are no other elements present between them.

[0051] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more of the associated listed items; similarly, "at least one of..." includes any one of the associated listed items and any combination of any two or more of the associated listed items.

[0052] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Instead, these terms are used solely to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, first component, first region, first layer, or first portion mentioned in the examples described herein may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples.

[0053] For ease of description, spatially relative terms such as "above," "upper," "below," "lower," etc. may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. In addition to the orientation depicted in the accompanying drawings, such spatially relative terms are intended to also include different orientations of the device in use or operation. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations of above and below, depending on the spatial orientation of the device. The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein will be interpreted accordingly.

[0054] The terms used herein are only used to describe various examples and are not intended to limit the present disclosure. The terms "a", "an", and "the" are intended to include plural forms as well, unless the context clearly indicates otherwise. The terms "include", "comprising", and "having" specify the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0055] Due to manufacturing techniques and / or tolerances, the shapes shown in the drawings may vary. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shape that occur during manufacturing.

[0056] In this document, it is noted that use of the term “may” with respect to an example, for example with respect to what an example may include or implement, means that there is at least one example that includes or implements this feature, and all examples are not limited thereto.

[0057] As will be apparent after understanding this disclosure, the features of the examples described herein may be combined in various ways. In addition, although the examples described herein have multiple configurations, other configurations are also possible, as will be apparent after understanding this disclosure.

[0058] The present disclosure relates to a camera module, and the camera module may be mounted on a portable electronic device such as a mobile communication terminal, a smart phone, or a tablet PC.

[0059] Figure 1 This is a perspective view of the camera module. Figure 2 is an exploded perspective view of a camera module according to an embodiment of the present disclosure.

[0060] Reference Figure 1 and Figure 2 , the camera module 1 may include a first lens module 210 , a reflection module 300 and a housing 100 .

[0061] The first lens module 210 includes at least one lens that may have a first optical axis (Y axis). The first optical axis (Y axis) may be relative to Figure 1 and Figure 2 Extends in the vertical direction.

[0062] The first lens module 210 may be disposed in front of the reflection module 300. Here, "in front" may mean in the positive first optical axis (Y axis) direction (+Y axis direction) relative to the reflection module 300. For example, the first lens module 210 may be disposed higher than the reflection module 300 in the direction of the first optical axis (Y axis).

[0063] The first lens module 210 and the reflection module 300 are disposed in the housing 100 .

[0064] In an embodiment, the camera module 1 may further include a second lens module 220. The reflection module 300 is disposed between the first lens module 210 and the second lens module 220. The second lens module 220 includes a plurality of lenses arranged along a second optical axis (Z axis).

[0065] A first optical axis (Y axis) of the first lens module 210 and a second optical axis (Z axis) of the second lens module 220 may be formed perpendicularly to each other.

[0066] The first lens module 210 includes one or more lenses, and the second lens module 220 includes a plurality of lenses.

[0067] When viewed in the direction of the first optical axis (Y axis), one or more lenses of the first lens module 210 may be circular. When viewed in the direction of the second optical axis (Z axis), at least one of the multiple lenses of the second lens module 220 may be non-circular. For example, the non-circular lens may have different lengths in two directions perpendicular to the second optical axis (Z axis) and perpendicular to each other. In an embodiment, the non-circular lens may have a length in the first axis (X axis) perpendicular to both the first optical axis (Y axis) and the second optical axis (Z axis) that is longer than the length in the first optical axis (Y axis).

[0068] The first lens module 210 and the reflection module 300 may be configured to rotate together for shake correction. The second lens module 220 may be movable in the second optical axis (Z axis) direction for focus adjustment.

[0069] The camera module 1 may further include an image sensor module 800 .

[0070] like Figure 9 As shown in , the image sensor module 800 includes a sensor housing 830 , an image sensor 810 , and a printed circuit board 820 , and may further include an infrared blocking filter.

[0071] An infrared blocking filter may be mounted on the sensor housing 830. The infrared blocking filter blocks light in an infrared region among the light that has passed through the second lens module 220.

[0072] The printed circuit board 820 is coupled to the sensor housing 830 , and the image sensor 810 is disposed on the printed circuit board 820 .

[0073] The light passing through the second lens module 220 is received by the image sensor module 800 (eg, image sensor 810 ).

[0074] The camera module 1 may further include a light shielding plate 130. The light shielding plate 130 is provided in the housing 100 and serves to prevent a flare phenomenon from occurring due to unintentional reflection of light within the housing 100.

[0075] The light shielding plate 130 may be disposed in a space between the second lens module 220 and the image sensor module 800. In addition, the light shielding plate 130 may be disposed closer to the image sensor module 800 than the second lens module 220.

[0076] Therefore, even if unintentional reflection of light occurs within the housing 100, it is possible to prevent light diffusely reflected by the light shielding plate 130 from entering the image sensor 810. Therefore, the flare phenomenon can be suppressed.

[0077] The camera module 1 may further include a housing 110. The housing 110 is coupled to the casing 100 to cover an upper portion of the casing 100. The housing 110 has an opening through which light enters. Light incident through the opening of the housing 110 is incident on the first lens module 210.

[0078] On the other hand, at least a portion of the first lens module 210 may be provided to protrude outside the housing 100. In addition, the housing 110 may further include a cover 120 covering the first lens module 210. An opening of the housing 110 may be formed in the cover 120.

[0079] Figure 3 is an exploded perspective view of a reflection module according to an embodiment of the present disclosure. Figure 4 is a perspective view of a reflection module according to an embodiment of the present disclosure. Figure 5 Observed in different directions Figure 3 , and Figure 6 Observed in different directions Figure 4 view.

[0080] Figure 7 is a view showing a first ball member provided in a housing. Figure 8 FIG. 1 is a diagram showing a reflection module that rotates about the second optical axis. Figure 9 is a diagram showing a holder that rotates using a first shaft as a rotation axis.

[0081] The reflection module 300 includes a reflection member 310 , a holder 330 , and a guide member 320 .

[0082] The reflective member 310 has a reflective surface that reflects light that has passed through the first lens module 210. For example, the reflective member 310 may be a prism or a mirror.

[0083] The reflective member 310 is mounted on the holder 330. The first lens module 210 may be disposed in front of the reflective member 310. In an embodiment, the first lens module 210 may be mounted on the holder 330.

[0084] The holder 330 is rotatably provided on the guide member 320. In addition, the guide member 320 is rotatably provided in the housing 100.

[0085] The guide member 320 can rotate using the second optical axis (Z axis) as a rotation axis. For example, the guide member 320 can rotate relative to the housing 100 using the second optical axis (Z axis) as a rotation axis. The first lens module 210 and the holder 330 can also rotate together with the guide member 320. On the other hand, the second optical axis (Z axis) can also be referred to as the first rotation axis.

[0086] The holder 330 can rotate using a first axis (X axis) perpendicular to both the first optical axis (Y axis) and the second optical axis (Z axis) as a rotation axis. For example, the holder 330 can rotate relative to the guide member 320 using the first axis (X axis) as a rotation axis. The first lens module 210 can rotate together with the holder 330.

[0087] On the other hand, the first axis (X axis) may also be referred to as a second rotation axis.

[0088] A first driving unit 400 may be provided to rotate the reflection module 300. The first driving unit 400 includes a first magnet 410 and a first coil 420. The guide member 320 may be rotated by the first driving unit 400. When the holder 330 is disposed on the guide member 320 and the first lens module 210 is disposed on the holder 330, the holder 330 and the first lens module 210 may also rotate together with the guide member 320.

[0089] The first magnet 410 may be mounted on the guide member 320. As an example, the first magnet 410 may be mounted on one side surface of the guide member 320.

[0090] The first magnet 410 may be magnetized so that one side (e.g., the side facing the first coil 420) may have both an N pole and an S pole. In an embodiment, one surface of the first magnet 410 facing the first coil 420 may be provided with an N pole, a neutral region, and an S pole in sequence along the first optical axis (Y axis).

[0091] A virtual line extending the second optical axis (Z axis) of the second lens module 220 may pass through one surface of the first magnet 410. For example, a virtual line extending the second optical axis (Z axis) of the second lens module 220 may pass through a neutral region of the first magnet 410.

[0092] The first coil 420 may be provided at a position facing the first magnet 410. In an embodiment, the first coil 420 may be arranged to face the first magnet 410 in the second optical axis (Z-axis) direction.

[0093] The first coil 420 is provided on the substrate 900, and the substrate 900 is mounted on the housing 100 so that the first magnet 410 and the first coil 420 face each other in the second optical axis (Z axis) direction. In an embodiment, the first coil 420 may be provided on one inner surface of the substrate 900. The substrate 900 may be mounted on a side portion of the housing 100 so that the first magnet 410 and the first coil 420 face each other in the second optical axis (Z axis) direction.

[0094] The housing 100 is provided with a through hole penetrating the housing 100 , and the first coil 420 is provided in the through hole to directly face the first magnet 410 .

[0095] During shake correction, the first magnet 410 is a moving member mounted on the guide member 320 and rotates together with the guide member 320 , while the first coil 420 is a fixed member fixed to the base plate 900 .

[0096] The first coil 420 may include two coils. The two coils may be spaced apart in the first axis (X axis) direction. By applying current to the two coils in opposite directions, the first driving unit 400 may generate the driving force required for the guide member 320 to rotate around the second optical axis (Z axis).

[0097] In another embodiment, the first magnet 410 may include two magnets spaced apart in the first axis (X-axis) direction, and each magnet may be arranged to face one coil.

[0098] The first ball member B1 may be disposed between the guide member 320 and the housing 100. The first ball member B1 is disposed between the guide member 320 and the housing 100 to support rotation of the guide member 320 and may reduce friction when the guide member 320 rotates.

[0099] The first ball member B1 may include a first ball group BG1 and a second ball group BG2 spaced apart in the second optical axis (Z-axis) direction.

[0100] The first ball group BG1 may include a plurality of balls. The plurality of balls of the first ball group BG1 may be arranged in the direction of the first axis (X axis). The second ball group BG2 may include a plurality of balls. The plurality of balls in the second ball group BG2 may be arranged in the direction of the first axis (X axis). In an embodiment, the second ball group BG2 may include a smaller number of balls than the number of balls included in the first ball group BG1.

[0101] When the guide member 320 rotates, the plurality of balls in the first ball group BG1 and the plurality of balls in the second ball group BG2 may roll.

[0102] An attractive force may act between the guide member 320 and the housing 100. In an embodiment, the first pulling magnet 430 may be provided on the guide member 320, and the first pulling yoke 440 may be provided on the housing 100. In another embodiment, the first pulling magnet 430 may be provided on both the guide member 320 and the housing 100.

[0103] The first pulling magnet 430 may be disposed between the first ball group BG1 and the second ball group BG2 .

[0104] One side of the first pulling magnet 430 (eg, a side facing the first pulling yoke 440 ) may be magnetized in the form of an N pole, a neutral region, and an S pole in a first axis (X axis) direction.

[0105] The first pulling magnet 430 and the first pulling yoke 440 may face each other in the first optical axis (Y-axis) direction. In an embodiment, the first pulling magnet 430 may be provided on the lower surface of the guide member 320, and the first pulling yoke 440 may be provided on the bottom surface of the housing 100. A through hole penetrating the bottom surface of the housing 100 may be provided in the housing 100, and the first pulling yoke 440 may directly face the first pulling magnet 430 through the through hole.

[0106] The first pulling magnet 430 and the first pulling yoke 440 can generate an attractive force between each other. For example, the first pulling yoke 440 can be made of a magnetic material. The attractive force acts between the first pulling magnet 430 and the first pulling yoke 440 in the direction of the first optical axis (Y axis).

[0107] Due to the attractive force between the first pulling magnet 430 and the first pulling yoke 440 , the first ball member B1 may maintain contact with the guide member 320 and the housing 100 .

[0108] The length of the first pulling yoke 440 in the first axis (X-axis) direction may be smaller than the length of the first pulling magnet 430 in the first axis (X-axis) direction.

[0109] When viewed in the first optical axis (Y-axis) direction, one end of the first pulling yoke 440 in the first axis (X-axis) direction may be located between the N pole and the neutral region of the first pulling magnet 430. Furthermore, when viewed in the first optical axis (Y-axis) direction, the other end of the first pulling yoke 440 in the first axis (X-axis) direction may be located between the S pole and the neutral region of the first pulling magnet 430.

[0110] In the surfaces of the guide member 320 and the housing 100 facing each other (for example, the surfaces facing each other in the first optical axis (Y-axis) direction), a first guide groove g1 and a second guide groove g2 are respectively provided. For example, the first guide groove g1 and the second guide groove g2 are formed in the lower surface of the guide member 320, and the first guide groove g1 and the second guide groove g2 can be formed in the inner bottom surface of the housing 100.

[0111] The first guide groove g1 and the second guide groove g2 may each have a rounded shape. In an embodiment, the first guide groove g1 and the second guide groove g2 each have a rolling surface or channel on which the ball rolls, and the rolling surface may be a curved surface. That is, the first guide groove g1 and the second guide groove g2 may each have a curved profile.

[0112] In an embodiment, the curvature radius of the rolling surface may be equal to the distance between the second optical axis (Z axis) (or a virtual axis extending the second optical axis (Z axis)) and the rolling surface in the first optical axis (Y axis) direction.

[0113] In an embodiment, the rolling surface or channel of the first guide groove g1 and the rolling surface or channel of the second guide groove g2 can be an arc of a circle centered on the second optical axis (Z axis), which is the rotation axis (or an imaginary axis extending the second optical axis (Z axis)).

[0114] Therefore, the guide member 320 may rotate using the second optical axis (Z axis) as a rotation axis.

[0115] The first guide groove g1 and the second guide groove g2 may be spaced apart in the second optical axis (Z-axis) direction.

[0116] The first ball group BG1 is disposed in the first guide groove g1, and the second ball group BG2 is disposed in the second guide groove g2.

[0117] In an embodiment, the first ball group BG1 and the second ball group BG2 each include three balls. The three balls of the first ball group BG1 are arranged along the first axis (X axis). The three balls of the second ball group BG2 are also arranged along the first axis (X axis).

[0118] Of the three balls in the first ball group BG1, the two balls disposed outermost in the first axis (X-axis) direction have a larger diameter than the balls disposed between them. Furthermore, of the three balls in the first ball group BG1, the two balls disposed outermost in the first axis (X-axis) direction make two-point contact with the first guide groove g1 of the guide member 320, and also make two-point contact with the first guide groove g1 of the housing 100. Of the three balls in the first ball group BG1, the ball with the smaller diameter makes contact with either the first guide groove g1 of the guide member 320 or the first guide groove g1 of the housing 100.

[0119] Of the three balls in the second ball group BG2, the two outermost balls in the first (X) axis direction have a larger diameter than the balls positioned between them. Furthermore, of the three balls in the second ball group BG2, the two outermost balls in the first (X) axis direction make two-point contact with the second guide groove g2 of the guide member 320 and make single-point contact with the second guide groove g2 of the housing 100 (and vice versa). The ball with the smaller diameter among the three balls in the second ball group BG2 makes contact with either the second guide groove g2 of the guide member 320 or the second guide groove g2 of the housing 100.

[0120] The first ball group BG1 and the first guide groove g1 may serve as main guides to guide the rotation of the guide member 320 , and the second ball group BG2 and the second guide groove g2 may serve as auxiliary guides to support the rotation of the guide member 320 .

[0121] In another embodiment, the first ball group BG1 includes three balls, and the second ball group BG2 includes fewer balls than the first ball group BG1. That is, the second ball group BG2 may include one or two balls.

[0122] In an embodiment, the camera module 1 can detect the position of the guide member 320. To this end, a first position sensor 450 is provided. The first position sensor 450 can be set at a position of the first traction magnet 430 facing the guide member 320 (for example, a position facing in the direction of the first optical axis (Y axis)). For example, in the housing 100, a through hole penetrating the housing 100 in the direction of the first optical axis (Y axis) can be set, and the first position sensor 450 can be set in the through hole. The first position sensor 450 is connected to the substrate 900. In an embodiment, the substrate 900 covering the through hole can be set on the lower surface of the housing 100, and the first position sensor 450 can be set on the substrate 900.

[0123] Therefore, when the guide member 320 rotates with the second optical axis (Z axis) as the rotation axis, the position of the guide member 320 may be detected by the first position sensor 450 .

[0124] In another embodiment, the first position sensor 450 may be provided at a position facing the first magnet 410 (eg, a position facing in the second optical axis (Z-axis) direction).

[0125] The first position sensor 450 may be a Hall sensor.

[0126] A second driving unit 500 may be provided to rotate the holder 330. The second driving unit 500 includes a second magnet 510 and a second coil 520. The holder 330 may be rotated relative to the guide member 320 by the second driving unit 500. Since the first lens module 210 is disposed in the holder 330, the first lens module 210 may rotate together with the holder 330.

[0127] The second magnet 510 may be mounted on the holder 330. The second magnet 510 may be mounted on a side surface of the holder 330. In an embodiment, the second magnet 510 may include two magnets, and the two magnets may be respectively mounted on one side surface and the other side surface of the holder 330. The one side surface of the holder 330 and the other side surface of the holder 330 may be spaced apart in the first axis (X axis) direction.

[0128] The first ball member B1 may be disposed between two magnets of the second magnet 510 .

[0129] The second magnet 510 may be magnetized so that one surface (e.g., the surface facing the second coil 520) has both an N pole and an S pole. In an embodiment, one surface of the second magnet 510 facing the second coil 520 may be provided with an N pole, a neutral region, and an S pole in the first optical axis (Y axis) direction.

[0130] The second coil 520 may be disposed at a position facing the second magnet 510. In an embodiment, the second coil 520 may be disposed to face the second magnet 510 in the first axis (X axis) direction.

[0131] The second coil 520 is provided on the substrate 900, and the substrate 900 is mounted on the housing 100 so that the second magnet 510 and the second coil 520 face each other in the first axis (X axis) direction. In an embodiment, the second coil 520 may be provided on the other side of the substrate 900. The substrate 900 may be mounted on the side of the housing 100 so that the second magnet 510 and the second coil 520 face each other in the first axis (X axis) direction.

[0132] The housing 100 is provided with a through hole penetrating the housing 100 , and the second coil 520 is provided in the through hole and may directly face the second magnet 510 .

[0133] At the time of shake correction, the second magnet 510 is a moving member mounted on the holder 330 and rotates together with the holder 330 , while the second coil 520 is a fixed member fixed to the base plate 900 .

[0134] In an embodiment, the second coil 520 may include two coils. The two coils may be separated in the first axis (X axis) direction.

[0135] The second magnet 510 and the second coil 520 may be separated from the second ball member B2 in the second optical axis (Z axis) direction. For example, the second magnet 510 and the second coil 520 may be arranged closer to the first driving unit 400 than the second ball member B2 in the second optical axis (Z axis) direction.

[0136] In an embodiment, the second magnet 510 and the second coil 520 may be disposed between the first driving unit 400 and the second ball member B2 in the second optical axis (Z-axis) direction.

[0137] When power is supplied to the second driving unit 500 , the second driving unit 500 may generate a driving force required to rotate the holder 330 around the first axis (X axis) as a rotation axis.

[0138] The second ball member B2 may be disposed between the holder 330 and the guide member 320. The second ball member B2 may be disposed between the holder 330 and the guide member 320 to form a rotation axis of the holder 330.

[0139] The second ball member B2 includes a plurality of balls spaced apart in the first axis (X axis) direction. A virtual line of the plurality of balls of the second ball member B2 in the first axis (X axis) direction may pass through the reflective surface of the reflective member 310.

[0140] An attractive force may act between the holder 330 and the guide member 320. In one embodiment, the second pulling magnet 530 may be provided on the guide member 320, and the second pulling yoke 540 may be provided on the holder 330. In another embodiment, the second pulling magnet 530 may be provided on both the holder 330 and the guide member 320.

[0141] The second pulling magnet 530 may be disposed between the plurality of balls of the second ball member B2.

[0142] One surface of the second pulling magnet 530 (eg, a surface facing the second pulling yoke 540 ) may be magnetized in the form of an N pole, a neutral region, and an S pole in the second optical axis (Z-axis) direction.

[0143] The second pulling magnet 530 and the second pulling yoke 540 may face each other in the first optical axis (Y axis) direction. In an embodiment, the second pulling magnet 530 may be disposed on the upper surface of the guide member 320 , and the second pulling yoke 540 may be disposed on the lower surface of the holder 330 .

[0144] The second pulling magnet 530 and the second pulling yoke 540 can generate an attractive force between each other. For example, the second pulling yoke 540 can be made of a magnetic material. The attractive force acts between the second pulling magnet 530 and the second pulling yoke 540 in the direction of the first optical axis (Y axis).

[0145] Due to the attractive force between the second pulling magnet 530 and the second pulling yoke 540 , the second ball member B2 may remain in contact with the holder 330 and the guide member 320 .

[0146] On the other hand, the length of the second pulling yoke 540 in the second optical axis (Z-axis) direction may be smaller than the length of the second pulling magnet 530 in the second optical axis (Z-axis) direction.

[0147] When viewed in the first optical axis (Y-axis) direction, one end of the second pulling yoke 540 in the second optical axis (Z-axis) direction may be located between the N pole and the neutral region of the second pulling magnet 530. Furthermore, when viewed in the first optical axis (Y-axis) direction, the other end of the second pulling yoke 540 in the second optical axis (Z-axis) direction may be located between the S pole and the neutral region of the second pulling magnet 530.

[0148] The third guide groove g3 may be provided on surfaces of the holder 330 and the guide member 320 facing each other (eg, surfaces facing each other in the first optical axis (Y axis) direction). The third guide groove g3 includes a plurality of grooves spaced apart in the first axis (X axis) direction.

[0149] The second ball member B2 may be received in the third guide groove g3 to form a rotation axis of the retainer 330 .

[0150] In an embodiment, the camera module 1 can detect the position of the holder 330. For this purpose, a second position sensor 550 is provided. The second position sensor 550 can be provided at a position facing the second magnet 510 of the second driving unit 500 (for example, a position facing in the first axis (X axis) direction).

[0151] Therefore, when the holder 330 rotates around the first axis (X axis) as the rotation axis, the position of the holder 330 can be detected by the second position sensor 550 .

[0152] The second position sensor 550 may be a Hall sensor.

[0153] On the other hand, refer to Figure 5The spacer 211 may be disposed on the lower surface of the first lens module 210 (e.g., the surface facing the reflective member 310). The spacer 211 may have an entrance hole through which light passes, and the entrance hole may be non-circular. For example, the shape of the entrance hole may resemble a racetrack. That is, the inner surface of the spacer 211 forming the entrance hole may include two flat surfaces extending parallel to each other and two curved surfaces connecting the two flat surfaces.

[0154] The inner surface of the spacer 211 may have a wave shape in which concave and convex shapes are repeated, thereby preventing a flare phenomenon.

[0155] Figure 10 is a perspective view showing a second lens module separated from a camera module according to an embodiment of the present disclosure, Figure 11 is a bottom stereogram of the second lens module, and Figure 12 is a diagram illustrating a first stopper and a second stopper coupled to a housing.

[0156] Reference Figure 10 , the second lens module 220 may be disposed between the reflection module 300 and the image sensor module 800 .

[0157] The second lens module 220 can move in the second optical axis (Z-axis) direction to perform focus adjustment.

[0158] The camera module 1 may include a third driving unit 600 to move the second lens module 220 in the second optical axis (Z-axis) direction.

[0159] The third driving unit 600 includes a third magnet 610 and a third coil 620. The third magnet 610 and the third coil 620 may be arranged to face each other in a direction perpendicular to the second optical axis (Z-axis) direction.

[0160] The third magnet 610 is mounted on the second lens module 220. As an example, the third magnet 610 may be provided on one surface of the second lens module 220. That is, the second lens module 220 has one side and the other side spaced apart in the first axis (X axis) direction, and the third magnet 610 may be provided on one side of the second lens module 220.

[0161] The third magnet 610 may be magnetized so that one surface (e.g., the side facing the third coil 620) may have both an N pole and an S pole. For example, one surface of the third magnet 610 facing the third coil 620 may include an N pole, a neutral region, and an S pole in sequence along the second optical axis (Z axis).

[0162] The third coil 620 is arranged to face the third magnet 610. For example, the third coil 620 may be arranged to face the third magnet 610 in a direction perpendicular to the second optical axis (Z axis) direction (eg, in the first axis (X axis) direction).

[0163] The third coil 620 is provided on the substrate 900 , and the substrate 900 is mounted on the housing 100 such that the third magnet 610 and the third coil 620 face each other in the first axis (X-axis) direction.

[0164] The housing 100 is provided with a through hole penetrating the housing 100 , and the third coil 620 provided on the substrate 900 may directly face the third magnet 610 through the through hole.

[0165] During focus adjustment, the third magnet 610 is a moving member mounted on the second lens module 220 and moves in the direction of the second optical axis (Z axis) together with the second lens module 220 , while the third coil 620 is a fixed member fixed to the base plate 900 .

[0166] When power is supplied to the third coil 620 , the second lens module 220 may move in the second optical axis (Z-axis) direction by an electromagnetic force between the third magnet 610 and the third coil 620 .

[0167] The third ball member B3 is disposed between the second lens module 220 and the housing 100, and the second lens module 220 can be guided by the third ball member B3 and move in the direction of the second optical axis (Z axis). The third ball member B3 includes a plurality of balls.

[0168] The third pulling magnet 630 may be provided on the lower surface of the second lens module 220, and the third pulling yoke 640 may be provided on the inner bottom surface of the housing 100. In another embodiment, the third pulling magnet 630 may be provided on both the second lens module 220 and the housing 100.

[0169] The third pulling magnet 630 may be disposed closer to one side surface of the second lens module 220. That is, the third pulling magnet 630 may be disposed closer to one side surface of the second lens module 220 on which the third magnet 610 is mounted than to the other side surface of the second lens module 220 on which the third magnet 610 is not mounted. In addition, the third pulling magnet 630 may be disposed between one side surface of the second lens module 220 and the second optical axis (Z axis).

[0170] The third pulling yoke 640 may be disposed at a position facing the third pulling magnet 630 in the direction of the first optical axis (Y axis). The third pulling magnet 630 and the third pulling yoke 640 may generate an attractive force between each other. For example, an attractive force may act between the third pulling magnet 630 and the third pulling yoke 640 in the direction of the first optical axis (Y axis).

[0171] Due to the attractive forces of the third pulling magnet 630 and the third pulling yoke 640 , the third ball member B3 may maintain contact with the second lens module 220 and the housing 100 , respectively.

[0172] The fourth guide groove g4 and the fifth guide groove g5 may be provided on surfaces facing each other of the second lens module 220 and the housing 100. For example, the fourth guide groove g4 may be provided on one side of the surfaces facing each other of the second lens module 220 and the housing 100, and the fifth guide groove g5 may be provided on the other side of the surfaces facing each other of the second lens module 220 and the housing 100.

[0173] The fourth guide groove g4 and the fifth guide groove g5 may be spaced apart in a direction perpendicular to the second optical axis (Z-axis) direction (eg, the first axis (X-axis) direction).

[0174] The fourth guide groove g4 and the fifth guide groove g5 extend in a direction parallel to the second optical axis (Z axis).

[0175] Some of the plurality of balls of the third ball member B3 are disposed in the fourth guide groove g4, and the remaining balls of the plurality of balls of the third ball member B3 are disposed in the fifth guide groove g5.

[0176] The number of contact points between some of the plurality of balls of the third ball member B3 and the fourth guide groove g4 is greater than the number of contact points between the remaining balls of the third ball member B3 and the fifth guide groove g5.

[0177] The fourth guide groove g4 may be disposed closer to the third magnet 610 than the fifth guide groove g5.

[0178] The third pulling magnet 630 may be disposed closer to the fourth guide groove g4 than to the fifth guide groove g5 .

[0179] In an embodiment, the camera module 1 can detect the position of the second lens module 220. For this purpose, a third position sensor 650 is provided. The third position sensor 650 can be provided at a position facing the third magnet 610 of the third driving unit 600 (for example, at a position facing in the first axis (X axis) direction).

[0180] Therefore, when the second lens module 220 moves in the second optical axis (Z-axis) direction, the position of the second lens module 220 may be detected by the third position sensor 650 .

[0181] The third position sensor 650 may be a Hall sensor.

[0182] On the other hand, refer to Figure 12 The camera module 1 may further include a first stopper 710. The first stopper 710 may be coupled to the housing 100 to cover at least a portion of the reflective module 300. For example, the first stopper 710 may cover at least a portion of the upper surface of the holder 330.

[0183] The first stopper 710 can prevent the reflection module 300 from being separated from the housing 100 due to external impact, etc. The buffer member 720 having elasticity can be coupled to the first stopper 710. For example, the first stopper 710 has a surface facing the second lens module 220 in the direction of the second optical axis (Z axis), and the buffer member 720 can be installed on the surface.

[0184] The camera module 1 may further include a second stopper 730. The second stopper 730 may be coupled to the housing 100 and disposed in a space between the second lens module 220 and the image sensor module 800. For example, the second stopper 730 may be disposed on both sides of the light shielding plate 130.

[0185] The buffer member 740 having elasticity may be coupled to the second stopper 730. For example, the second stopper 730 may have a surface facing the second lens module 220 in the second optical axis (Z axis) direction, and the buffer member 740 may be mounted on the corresponding surface.

[0186] Figure 13 is an exploded perspective view of a camera module according to another embodiment of the present disclosure.

[0187] Figure 13 The camera module of the embodiment shown in FIG. 2 includes a second lens module 221 and a third lens module 222 .

[0188] Each of the second lens module 221 and the third lens module 222 includes a plurality of lenses arranged along the second optical axis (Z axis).

[0189] The second lens module 221 and the third lens module 222 each have an extending portion extending in the second optical axis (Z-axis) direction.

[0190] The second lens module 221 has one side surface and another side surface spaced apart in the first axis (X axis) direction, and an extension portion of the second lens module 221 may extend in the second optical axis (Z axis) direction in one side surface of the second lens module 221 .

[0191] The third lens module 222 has one side surface and another side surface spaced apart in the first axis (X axis) direction, and an extension portion of the third lens module 222 may extend from the other side surface of the third lens module 222 in the direction of the second optical axis (Z axis).

[0192] For example, the extending portion of the second lens module 221 and the extending portion of the third lens module 222 may be disposed to overlap in the first axis (X-axis) direction.

[0193] In an embodiment, at least a portion of the extension portion of the second lens module 221 and at least a portion of the extension portion of the third lens module 222 may face each other in the first axis (X-axis) direction.

[0194] The second lens module 221 may be movable in the second optical axis (Z axis) direction. In an embodiment, the camera module may include a third driving unit 601 .

[0195] The third driving unit 601 includes a third magnet 611 and a third coil 612. The third magnet 611 and the third coil 612 may be disposed facing each other on the first axis (X axis).

[0196] The third magnet 611 is mounted on the second lens module 221. For example, the third magnet 611 may be disposed on one side surface of the second lens module 221. At least a portion of the third magnet 611 may be disposed in an extension portion of the second lens module 221.

[0197] The third magnet 611 may be magnetized so that one surface (e.g., the surface facing the third coil 612) has both an N pole and an S pole. For example, the one surface of the third magnet 611 facing the third coil 612 may include an N pole, a neutral region, and an S pole arranged in the direction of the second optical axis (Z axis).

[0198] The third coil 612 is arranged to face the third magnet 611. The third coil 612 is provided on the substrate 900, and the substrate 900 is mounted on the housing 100 so that the third magnet 611 and the third coil 612 face each other in the first axis (X axis) direction.

[0199] The housing 100 is provided with a through hole penetrating the housing 100 , and the third coil 612 provided on the substrate 900 may directly face the third magnet 611 through the through hole.

[0200] When power is supplied to the third coil 612 , the electromagnetic force between the third magnet 611 and the third coil 612 may move the second lens module 221 in the second optical axis (Z-axis) direction.

[0201] The third ball member B3 is disposed between the second lens module 221 and the housing 100 , and the second lens module 221 may be guided by the third ball member B3 to move in the second optical axis (Z-axis) direction.

[0202] The third ball member B3 includes three balls, which may be arranged to form a triangle with three balls connected.

[0203] Two of the three balls are separated in the direction of the second optical axis (Z axis) and may be arranged closer to one side surface than the other side surface of the second lens module 221 .

[0204] The remaining one of the three balls may be disposed closer to the other side surface than to the one side surface of the second lens module 221 .

[0205] The third pulling magnet 631 may be provided on the lower surface of the second lens module 221, and the third pulling yoke may be provided on the inner bottom surface of the housing 100. Another embodiment may arrange the third pulling magnet 631 in both the second lens module 221 and the housing 100.

[0206] The third pulling magnet 631 may be disposed closer to one side surface than the other side surface of the second lens module 221 .

[0207] That is, the third pulling magnet 631 may be positioned closer to one side surface of the second lens module 221 on which the third magnet 611 is mounted than another side surface of the second lens module 221 on which the third magnet 611 is not mounted.

[0208] The third pulling magnet 631 may be disposed between one side surface of the second lens module 221 and the second optical axis (Z axis).

[0209] Two balls among the three balls of the third ball member B3 may be disposed in a space between the third pulling magnet 631 and one side surface of the second lens module 221 .

[0210] The third pulling yoke may be disposed at a position facing the third pulling magnet 631 in the first optical axis (Y-axis) direction. The third pulling magnet 631 and the third pulling yoke may generate an attractive force between each other.

[0211] A plurality of guide grooves may be provided on surfaces facing each other of the second lens module 221 and the housing 100. Three balls of the third ball member B3 are provided in the plurality of guide grooves.

[0212] Some of the plurality of guide grooves may extend to the lower surface of the extension portion of the second lens module 221. In addition, one of the two balls of the third ball member B3 located closer to one side surface of the second lens module 221 may be located between the extension portion of the second lens module 221 and the housing 100.

[0213] Two balls positioned near one side surface of the second lens module 221 in the third ball member B3 each have two-point contact with the guide groove of the second lens module 221 and two-point contact with the guide groove of the housing 100 .

[0214] The ball arranged near the other side surface of the second lens module 221 in the third ball member B3 has two-point contact with the guide groove of the second lens module 221 and single-point contact with the guide groove of the housing 100 (and vice versa).

[0215] In an embodiment, the camera module can detect the position of the second lens module 221. To this end, a third position sensor 613 is provided. The third position sensor 613 can be set at a position facing the third magnet 611 (for example, a position facing in the first axis (X axis) direction).

[0216] Therefore, when the second lens module 221 moves in the direction of the second optical axis (Z axis), the position of the second lens module 221 may be detected by the third position sensor 613. The third position sensor 613 may be a Hall sensor.

[0217] The third lens module 222 may be movable in the second optical axis (Z axis) direction. In an embodiment, the camera module may include a fourth driving unit 602 .

[0218] The fourth driving unit 602 includes a fourth magnet 621 and a fourth coil 622. The fourth magnet 621 and the fourth coil 622 may be disposed facing each other in the first axis (X axis) direction.

[0219] The fourth magnet 621 is mounted on the third lens module 222. For example, the fourth magnet 621 may be disposed on another side surface of the third lens module 222. In addition, at least a portion of the fourth magnet 621 may be disposed in an extension portion of the third lens module 222.

[0220] The fourth magnet 621 may be magnetized so that one surface (e.g., the surface facing the fourth coil 622) has both an N pole and an S pole. For example, one surface of the fourth magnet 621 facing the fourth coil 622 may be provided with an N pole, a neutral region, and an S pole in sequence in the direction of the second optical axis (Z axis).

[0221] The fourth coil 622 is arranged to face the fourth magnet 621. The fourth coil 622 is provided on the substrate 900, and the substrate 900 is mounted on the housing 100 so that the fourth magnet 621 and the fourth coil 622 face each other in the first axis (X axis) direction.

[0222] The housing 100 is provided with a through hole penetrating the housing 100 , and the fourth coil 622 provided on the substrate 900 may directly face the fourth magnet 621 through the through hole.

[0223] When power is supplied to the fourth coil 622 , electromagnetic force between the fourth magnet 621 and the fourth coil 622 may move the third lens module 222 in the second optical axis (Z-axis) direction.

[0224] The fourth ball member B4 is disposed between the third lens module 222 and the housing 100, and the third lens module 222 can be guided by the fourth ball member B4 to move in the second optical axis (Z axis) direction. The fourth ball member B4 includes three balls. The three balls can be configured to form a triangle with three balls connected.

[0225] Two of the three balls are separated in the direction of the second optical axis (Z axis) and may be arranged closer to one side surface of the third lens module 222 than to the other side surface.

[0226] The remaining one of the three balls may be disposed closer to one side surface than the other side surface of the third lens module 222 .

[0227] The fourth pulling magnet 632 may be provided on the lower surface of the third lens module 222, and the fourth pulling yoke may be provided on the inner bottom surface of the housing 100. In another embodiment, the fourth pulling magnet 632 may be provided on both the third lens module 222 and the housing 100.

[0228] The fourth pulling magnet 632 may be disposed closer to one side surface of the third lens module 222 than to the other side surface. That is, the fourth pulling magnet 632 may be disposed closer to another side surface of the third lens module 222 on which the fourth magnet 621 is mounted than to one side surface of the third lens module 222 on which the fourth magnet 621 is mounted.

[0229] The fourth pulling magnet 632 may be disposed between the other side surface of the third lens module 222 and the second optical axis (Z axis).

[0230] Two balls among the three balls of the fourth ball member B4 may be disposed in a space between the fourth pulling magnet 632 and the other side surface of the third lens module 222 .

[0231] The fourth pulling yoke may be disposed at a position facing the fourth pulling magnet 632 in the first optical axis (Y-axis) direction. The fourth pulling magnet 632 and the fourth pulling yoke may generate an attractive force between each other.

[0232] A plurality of guide grooves may be provided on surfaces facing each other of the third lens module 222 and the housing 100. Three balls of the fourth ball member B4 are provided in the plurality of guide grooves.

[0233] Some of the plurality of guide grooves may extend to the lower surface of the extension portion of the third lens module 222. In addition, one of the two balls of the fourth ball member B4 arranged near the other side surface of the third lens module 222 will be located between the extension portion of the third lens module 222 and the housing 100.

[0234] Two balls of the fourth ball member B4 provided closer to the other side surface of the third lens module 222 each have two-point contact with the guide groove of the third lens module 222 and two-point contact with the guide groove of the housing 100 .

[0235] The ball of the fourth ball member B4 disposed closer to one side surface of the third lens module 222 has two-point contact with the guide groove of the third lens module 222 and single-point contact with the guide groove of the housing 100 (and vice versa).

[0236] In an embodiment, the camera module can detect the position of the third lens module 222. For this purpose, a fourth position sensor 623 is provided. The fourth position sensor 623 can be set at a position facing the fourth magnet 621 (for example, a position facing in the first axis (X axis) direction).

[0237] Therefore, when the third lens module 222 moves in the direction of the second optical axis (Z axis), the position of the third lens module 222 may be detected by the fourth position sensor 623. The fourth position sensor 623 may be a Hall sensor.

[0238] An aspect of the present disclosure is to provide a reflective module capable of preventing resolution degradation during shake correction and a camera module including the reflective module.

[0239] According to another aspect of the present disclosure, a reflective module and a camera module including the reflective module can prevent resolution degradation during shake correction.

[0240] Although specific examples have been shown and described above, it will be apparent after understanding this disclosure that various changes in form and detail can be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described herein are to be considered merely descriptive and not for purposes of limitation. The description of features or aspects in each example is considered to be applicable to similar features or aspects in other examples. Suitable results may also be obtained if the described techniques are performed in a different order, and / or if components in the described systems, architectures, devices, or circuits are combined in different ways and / or replaced or supplemented by other components or their equivalents. Therefore, the scope of the present disclosure is not limited by the specific embodiments, but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents are to be construed as included in this disclosure.

Claims

1. A reflection module, characterized in that: include: A first lens module having a first optical axis; a holder, on which a reflective member is provided to reflect light passing through the first lens module; a guide member on which the retainer is disposed; a housing accommodating the retainer and the guide member; as well as a first ball member disposed between the guide member and the housing and including a first ball group and a second ball group, the first ball group and the second ball group being spaced apart in a direction of a first rotation axis, wherein the first lens module and the holder are configured to rotate together about the first rotation axis and the second rotation axis, the first rotation axis and the second rotation axis being perpendicular to each other and perpendicular to the first optical axis, wherein the guide member is configured to rotate around the first rotation axis together with the first lens module and the holder, and The first ball group includes a plurality of balls arranged in the direction of the second rotation axis.

2. The reflection module according to claim 1, characterized in that A first guide groove and a second guide groove are provided on surfaces of the guide member and the housing facing each other in the direction of the first optical axis. wherein the first ball group is disposed in the first guide groove, and the second ball group is disposed in the second guide groove, and Wherein, each of the first guide groove and the second guide groove has a curved profile.

3. The reflection module according to claim 2, characterized in that: Each of the first guide groove and the second guide groove has a rolling passage for the first ball group or the second ball group, and A curvature radius of the rolling channel is equal to a distance between the first rotation axis and the rolling channel in the direction of the first optical axis.

4. The reflection module according to claim 1, characterized in that Among the plurality of balls of the first ball group, two balls disposed outermost in the direction of the second rotation axis have a diameter larger than a diameter of a ball disposed between the two balls.

5. The reflection module according to claim 4, characterized in that: The two balls are in two-point contact with the guide member and in two-point contact with the housing.

6. The reflection module according to claim 4, characterized in that: The second ball group includes a smaller number of balls than the number of the plurality of balls included in the first ball group.

7. The reflection module according to claim 1, characterized in that: The diameter of the middle ball of the first ball group is smaller than the diameters of the other balls of the first ball group.

8. The reflection module according to claim 1, characterized in that: A first pulling magnet is provided on one of the guide member and the housing, and a first pulling yoke is provided on the other of the guide member and the housing, wherein the first pulling magnet and the first pulling yoke face each other in the direction of the first optical axis, and Wherein, the first pulling magnet is arranged between the first ball group and the second ball group.

9. The reflection module according to claim 1, characterized in that: The invention further includes a first driving unit including a first magnet provided on the guide member and a first coil provided to face the first magnet. wherein the first magnet and the first coil face each other in the direction of the first rotation axis, and A surface of the first magnet facing the first coil has an N pole, a neutral region, and an S pole along the first optical axis.

10. The reflection module according to claim 9, characterized in that: A virtual line extending the first rotation axis passes through the one surface of the first magnet.

11. The reflection module according to claim 9, characterized in that: The first coil includes two coils spaced apart in the direction of the second rotation axis.

12. The reflection module according to claim 1, characterized in that further comprising a second ball member disposed between the retainer and the guide member, The second ball member includes a plurality of balls spaced apart in the direction of the second rotation axis.

13. The reflection module according to claim 12, characterized in that: A second pulling magnet is provided on one of the holder and the guide member, and a second pulling yoke is provided on the other of the holder and the guide member, wherein the second pulling magnet and the second pulling yoke face each other in the direction of the first optical axis, and Wherein, the second pulling magnet is disposed between the plurality of balls of the second ball member.

14. The reflection module according to claim 12, characterized in that: further comprising a second driving unit including a second magnet provided on the holder and a second coil provided to face the second magnet, wherein one surface of the second magnet facing the second coil has an N pole, a neutral region, and an S pole along the first optical axis, and The second driving unit is provided to be spaced apart from the second ball member in the direction of the first rotation axis.

15. A camera module, characterized in that: The device comprises a reflection module according to any one of claims 1 to 14.

16. A camera module, characterized in that: include: a guide member disposed in the housing to rotate about a first rotation axis; a holder provided on the guide member to rotate relative to the guide member based on a second rotation axis perpendicular to the first rotation axis and having a reflecting member; a first ball member disposed between the guide member and the housing and including a plurality of balls arranged to roll in the direction of the second rotation axis; a first lens module mounted on the holder and having a first optical axis perpendicular to both the first rotation axis and the second rotation axis; as well as The second lens module is configured so that the light reflected from the reflection member is incident on the second lens module.

17. The camera module according to claim 16, wherein: A guide groove is provided on surfaces of the guide member and the housing facing each other in the direction of the first optical axis, and The guide groove has a curved profile around the first rotation axis.

18. The camera module according to claim 16, wherein: Also includes: a first driving unit including a first magnet provided on the guide member and a first coil provided to face the first magnet in the direction of the first rotation axis; a second driving unit including a second magnet provided on the holder and a second coil provided to face the second magnet; as well as A second ball member is provided between the holder and the guide member and includes a plurality of balls spaced apart in the direction of the second rotation axis.

19. The camera module according to claim 18, wherein: The second driving unit is provided between the first driving unit and the second ball member in the direction of the first rotation axis, wherein the second driving unit includes two magnets spaced apart in the direction of the second rotation axis and two coils spaced apart in the direction of the second rotation axis, and Wherein, the first ball member is arranged between the two magnets.

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