Lens driving device, camera module, and optical instrument

Abstract

The present embodiment comprises: a fixed part; a moving portion disposed inside the fixed portion; a driving magnet disposed on the moving portion; a coil disposed on the fixed portion to correspond to the driving magnet; and a ball disposed between the fixed portion and the moving portion, in which the ball guides the moving portion to move in an optical axis direction with respect to the fixed portion, the fixed portion including: a first side plate and a second side plate disposed on opposite sides to each other; and third and fourth side plates connecting the first and second side plates and arranged on opposite sides of each other, the moving portion including: first and second side surfaces arranged on opposite sides of each other; and a third side surface and a fourth side surface connecting the first side surface and the second side surface and arranged on opposite sides to each other, the first to fourth side plates facing the first to fourth side surfaces, the driving magnet moving the moving portion in the optical axis direction via interaction with the coil, the ball includes a first ball disposed in a first corner region where the first side plate and the fourth side plate of the fixed part are connected, a second ball disposed in a second corner region where the second side plate and the third side plate are connected, and a third ball disposed in a third corner region where the third side plate and the fourth side plate are connected. And a second ball disposed in a second corner region where the second side plate and the third side plate of the fixed portion are connected.

Description

Technical Field

[0001] This embodiment relates to a lens driving device. Background Art

[0002] The camera device is a device that takes a picture or a video of a subject, and is installed in optical instruments such as smartphones, drones, and vehicles.

[0003] The camera device needs an auto focus (AF) function that automatically adjusts the focal length according to the distance between the camera device and the subject. In addition, an optical image stabilization (OIS) function that compensates for image shake caused by user movement is needed to improve image quality.

[0004] However, as the resolution of image sensors has increased in recent years, the lens diameter has also increased, and the driving force required to move the lens to perform an autofocus function or an image stabilization function has also increased. Summary of the invention

[0005] [Technical topics]

[0006] The present embodiment aims to provide a lens driving device that provides an increased driving force within a limited size.

[0007] [Technical solution]

[0008] According to the present embodiment, the lens driving device includes: a fixed part; a moving part, which is arranged inside the fixed part; a driving magnet, which is arranged on the moving part; a coil, which is arranged on the fixed part to correspond to the driving magnet; and a ball, which is arranged between the fixed part and the moving part, wherein the ball guides the moving part to move relative to the fixed part in the optical axis direction, wherein the fixed part includes a first side plate and a second side plate arranged opposite to each other, and a third side plate and a fourth side plate connecting the first side plate and the second side plate and arranged opposite to each other, wherein the moving part includes: a first side and a second side arranged opposite to each other; and a third side plate and a fourth side plate connected to the first side plate and arranged opposite to each other A third side and a fourth side of a side surface and a second side surface, wherein the first side plate to the fourth side plate face the first side surface to the fourth side surface, wherein the driving magnet moves the moving part in the optical axis direction via interaction with the coil, wherein the driving magnet includes a first driving magnet arranged on the first side surface of the moving part and a second driving magnet arranged on the third side surface of the moving part, and wherein the ball includes: a first ball arranged in a first corner area, and the first side plate and the fourth side plate of the fixed part are connected in the first corner area; and a second ball arranged in a second corner area, and the second side plate and the third side plate of the fixed part are connected in the second corner area.

[0009] The first side plate includes a first protrusion protruding from an inner surface of the first side plate, the first protrusion includes a groove, and the first ball is arranged in the groove of the first side plate.

[0010] The third side plate includes a second protrusion protruding from an inner surface of the third side plate, the second protrusion includes a groove, and the second ball is arranged in the groove of the third side plate.

[0011] The first side surface includes a first groove formed on a surface of the first side surface inwardly toward the moving portion, and the third side surface includes a second groove formed on a surface of the third side surface inwardly toward the moving portion.

[0012] The first protrusion of the first side plate is arranged in the first groove of the first side surface,

[0013] And the second protrusion of the third side plate is arranged in the second groove of the third side surface.

[0014] The first ball contacts the first protrusion of the first side plate and the first groove of the first side surface, and the second ball contacts the second protrusion of the third side plate and the second groove of the third side surface.

[0015] The lens driving device includes: a first yoke, which is arranged outside the fixed part and overlaps with the first side plate in a direction perpendicular to the optical axis direction; and a second yoke, which is arranged outside the fixed part and overlaps with the third side plate in a direction perpendicular to the optical axis direction.

[0016] The first ball includes a plurality of first balls, the second ball includes a plurality of second balls, the plurality of first balls are arranged in the optical axis direction, and the plurality of second balls are arranged in the optical axis direction.

[0017] According to the first embodiment, the lens driving device includes: a fixed part; a moving part, which is arranged inside the fixed part; a driving magnet, which is arranged on the moving part; a coil, which is arranged on the fixed part to correspond to the driving magnet; and a ball, which is arranged between the fixed part and the moving part, wherein the ball guides the moving part to move relative to the fixed part in the optical axis direction, wherein the fixed part includes a first side plate and a second side plate arranged opposite to each other, and a third side plate and a fourth side plate connecting the first side plate and the second side plate and arranged opposite to each other, wherein the moving part includes: a first side and a second side arranged opposite to each other; and a third side plate and a fourth side plate connected to the first side plate and arranged opposite to each other A third side and a fourth side of a side surface and a second side surface, wherein the first side plate to the fourth side plate face the first side surface to the fourth side surface, wherein the driving magnet moves the moving part in the optical axis direction via interaction with the coil, wherein the driving magnet includes a first driving magnet arranged on the first side surface of the moving part and a second driving magnet arranged on the third side surface of the moving part, and wherein the ball includes: a first ball arranged in a first corner area, and the first side plate and the third side plate of the fixed part are connected in the first corner area; and a second ball arranged in a second corner area, and the second side plate and the fourth side plate of the fixed part are connected in the second corner area.

[0018] The first side plate includes a protrusion protruding from an inner surface of the first side plate, and the second side plate includes a protrusion protruding from an inner surface of the second side plate.

[0019] The protruding portion of the first side plate and the protruding portion of the second side plate are rotationally symmetric with respect to the optical axis.

[0020] The protrusion of the first side plate includes a groove, and the first ball is arranged in the groove of the protrusion of the first side plate.

[0021] The first side surface includes a groove recessed inwardly from an outer surface of the first side surface toward the inside of the moving part, and the second side surface includes a groove recessed inwardly from an outer surface of the second side surface toward the inside of the moving part.

[0022] The protrusion of the first side plate is arranged in the groove of the first side surface, and the protrusion of the second side plate is arranged in the groove of the second side surface.

[0023] The lens driving device includes: a first yoke, which is arranged outside the fixed part and overlaps with the first side plate in a direction perpendicular to the optical axis direction; and a second yoke, which is arranged outside the fixed part and overlaps with the second side plate in a direction perpendicular to the optical axis direction.

[0024] The center of the first yoke overlaps with a first region of the moving portion in a direction perpendicular to the optical axis direction, and the center of the second yoke overlaps with a second region of the moving portion in a direction perpendicular to the optical axis direction.

[0025] According to the second embodiment, the lens driving device includes: a fixed part; a moving part, which is arranged inside the fixed part; a driving magnet, which is arranged on the moving part; a coil, which is arranged on the fixed part and arranged corresponding to the driving magnet; and a ball, which is arranged between the fixed part and the moving part, wherein the ball guides the moving part to move relative to the fixed part in the optical axis direction, wherein the fixed part includes a first side plate and a second side plate arranged opposite to each other, and a third side plate and a fourth side plate connecting the first side plate and the second side plate and arranged opposite to each other, wherein the moving part includes a first side surface and a second side surface arranged opposite to each other surface, and a third side surface and a fourth side surface connecting the first side surface and the second side surface and arranged in relative directions, wherein the first side plate to the fourth side plate face the first side surface to the fourth side surface, wherein the driving magnet moves the moving part in the optical axis direction by interacting with the coil, wherein the driving magnet includes a first driving magnet arranged on the first side surface of the moving part and a third driving magnet arranged on the third side surface of the moving part, wherein the ball includes a first ball and a second ball arranged in a corner area between the first side plate and the third side plate, and wherein the first ball and the second ball are arranged to be spaced apart from each other.

[0026] The camera device includes: a printed circuit board; an image sensor arranged on the printed circuit board;

[0027] A lens driving device according to any one of claims 1 to 17, which is arranged on a printed circuit board; and a lens, which is arranged in the lens driving device.

[0028] The optical instrument includes: a main body; a display unit disposed in the main body for displaying information; and the camera module of claim 18 disposed in the main body for capturing at least one of an image and a photo.

[0029] [Beneficial Effects]

[0030] According to the present embodiment, the effect of increasing the AF driving force is achieved by arranging the driving magnets and coils for driving AF in two directions. In addition, according to the present embodiment, the effect of increasing the AF driving force is achieved by arranging a plurality of driving magnets and coils for driving AF. That is, when the height of the cameras is the same, a higher AF driving force can be ensured compared to a structure in which the driving magnets and coils for driving AF are arranged in one direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a perspective view of a lens driving device according to the present embodiment.

[0032] Figure 2 is a plan view of the lens driving device according to this embodiment.

[0033] Figure 3 is an exploded perspective view of the lens driving device according to the present embodiment.

[0034] Figure 4 is a perspective view of a fixing portion in the lens driving device according to the present embodiment.

[0035] Figure 5 is a plan view of a fixed portion in the lens driving device according to the present embodiment.

[0036] Figure 6 is a perspective view of a moving portion in the lens driving device according to the present embodiment.

[0037] Figure 7 is a plan view of a moving portion in the lens driving device according to the present embodiment.

[0038] Figure 8 is an exploded perspective view of a lens driving device according to a first modified embodiment.

[0039] Fig. 9 is a plan view of a lens driving device according to a first modified embodiment.

[0040] Fig.10 is a perspective view of a fixing portion in a lens driving device according to a first modified embodiment.

[0041] Fig.11 is a plan view of a fixing portion in a lens driving device according to a first modified embodiment.

[0042] Fig.12 is a perspective view of a moving portion in a lens driving device according to a first modified embodiment.

[0043] Fig.13 is a plan view of a moving portion in a lens driving device according to a first modified embodiment.

[0044] Fig.14 1 is a diagram showing that a moving portion is tilted from a fixed portion in a lens driving device according to a first modified embodiment.

[0045] Fig.15 is a plan view of a lens driving device according to a second modified embodiment.

[0046] Figures 16 to 18 FIG. 1 is a diagram for explaining autofocus driving of the lens driving device according to the present embodiment. Fig.16 is a cross-sectional view showing the appearance of the moving portion in an initial state in which no current is applied to the first coil and the second coil. Fig.17is a cross-sectional view showing an appearance that the moving portion moves upward in the optical axis direction when a forward current is applied to the first coil and the second coil. Fig.18 is a diagram showing that when reverse current is applied to the first coil and the second coil, the moving part is Fig.17 A cross-sectional view of the appearance in which the position of the moving part moves downward in the optical axis direction.

[0047] Fig.19 is an exploded perspective view of the camera device according to this embodiment.

[0048] Fig. 20 is a perspective view of an optical instrument according to the present embodiment. DETAILED DESCRIPTION

[0049] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0050] However, the technical concept of the present invention is not limited to some embodiments to be described but may be implemented in various forms, and within the scope of the technical concept of the present invention, one or more of the constituent elements may be selectively combined or replaced between the embodiments.

[0051] In addition, unless explicitly defined and described, the terms (including technical terms and scientific terms) used in the embodiments of the present invention may be interpreted as meanings that can be generally understood by those skilled in the art, and commonly used terms such as terms defined in dictionaries may be interpreted in consideration of the meaning of the background of the relevant technology.

[0052] In addition, the terms used in this specification are for describing the embodiments and are not intended to limit the present invention.

[0053] In this specification, unless specifically stated in a phrase, a singular form may include a plural form, and when described as "at least one (or more than one) of A and B and C", it may include one or more of all combinations that can be combined with A, B and C.

[0054] In addition, when describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only intended to distinguish a component from other components, and these terms do not limit the nature, order, or sequence of the components.

[0055] Furthermore, when a component is described as being “connected,” “coupled” or “interconnected” to another component, the component is not only directly connected, coupled or interconnected to another component but may also include a case where it is “connected,” “coupled” or “interconnected” due to another component between the other components.

[0056] In addition, when described as being formed or arranged “on” or “below” each component, “on” or “below” means that it includes not only a case where two components are in direct contact, but also a case where one or more other components are formed or arranged between the two components. In addition, when expressed as “on” or “below”, it may include the meaning of not only an upward direction but also a downward direction relative to a component.

[0057] Hereinafter, a lens driving device according to the present embodiment is described with reference to the drawings.

[0058] Figure 1 is a perspective view of a lens driving device according to the present embodiment; Figure 2 is a plan view of a lens driving device according to the present embodiment; Figure 3 is an exploded perspective view of a lens driving device according to the present embodiment; Figure 4 is a perspective view of a fixed portion in the lens driving device according to the present embodiment; Figure 5 is a plan view of a fixed portion in the lens driving device according to the present embodiment; Figure 6 is a perspective view of a moving portion in the lens driving device according to the present embodiment; and Figure 7 is a plan view of a moving portion in the lens driving device according to the present embodiment.

[0059] The lens driving device may be a lens driving actuator. The lens driving device may be a voice coil motor (VCM). The lens driving device may be a lens driving motor. The lens driving device may include an AF module. The lens driving device may include an OIS module.

[0060] The lens driving device 10 according to the present embodiment may include a fixing portion 100 .

[0061] The fixed part 100 may be a stator. The fixed part 100 may be a relatively fixed part when the moving part 200 moves. The fixed part 100 may include a lower plate 110, a first side plate 121, a second side plate 122, a third side plate 123, and a fourth side plate 124. The first side plate 121, the second side plate 122, the third side plate 123, and the fourth side plate 124 may be arranged on the lower plate 110.

[0062] The lower plate 110 may include a lens hole 111. The lens hole 111 may be a hole penetrating the lower plate 110 in the optical axis direction. The lens hole 111 may be a hole having a circular cross section. A lens may be placed in the lens hole 111.

[0063] The first side plate 121 may be a side surface of the fixing portion 100. The first side plate 121 may protrude from the upper surface of the lower plate 110. The first side plate 121 may be arranged on the opposite side of the second side plate 122. The first side plate 121 may be connected to the third side plate 123. The first side plate 121 may be connected to the fourth side plate 124. The first side plate 121 may include a hole 141. The hole 141 of the first side plate 121 may be a hole formed in a direction perpendicular to the optical axis direction. The first coil 151 may be arranged in the hole 141 of the first side plate 121. The hole 141 of the first side plate 121 may have a square shape.

[0064] The first side plate 121 may include a first protrusion 131. The first protrusion 131 may protrude from the inner surface of the first side plate 121 toward the inner side of the fixing part 100. The first protrusion 131 may include a step that is recessed from the inner side of the fixing part 100 toward the outer side. The step of the first protrusion 131 may include a plurality of steps. The first protrusion 131 may include a groove. The groove of the first protrusion 131 may be a groove in which the first ball 310 to be described later is arranged. The second side plate 122 may be a side surface of the fixing part 100.

[0065] The second side plate 122 may protrude from the upper surface of the lower plate 110. The second side plate 122 may be arranged on the opposite side of the first side plate 121. The second side plate 122 may be connected to the third side plate 123. The second side plate 122 may be connected to the fourth side plate 124. The second side plate 122 may include a step 161 recessed from the inside of the fixed part 100 toward the outside. The step 161 of the second side plate 122 may correspond to the step 232 of the second side surface 212 of the moving part 200.

[0066] The third side plate 123 may be a side surface of the fixing portion 100. The third side plate 123 may protrude from the upper surface of the lower plate 110. The third side plate 123 may be arranged on the opposite side of the fourth side plate 124. The third side plate 124 may be connected to the first side plate 121. The first side plate 121 may be connected to the second side plate 122. The third side plate 123 may include a hole 142. The hole 142 of the third side plate 123 may be a hole formed in a direction perpendicular to the optical axis direction.

[0067] The second coil 152 may be placed in the hole of the third side plate 123. The hole of the third side plate 123 may have a square shape. The third side plate 123 may include a second protrusion 132. The second protrusion 132 may protrude from the inner surface of the third side plate 123 toward the inner side of the fixed part 100. The second protrusion 132 may include a groove. The groove of the second protrusion 132 may be a groove in which the second ball 320 to be described later is arranged. The groove of the second protrusion 132 may be a groove recessed from the second side plate 122 toward the inner side of the fixed part 100. The groove of the second protrusion 132 may be a groove in which the second ball 320 is arranged.

[0068] The fourth side plate 124 may be a side surface of the fixed part 100. The fourth side plate 124 may protrude from the upper surface of the lower plate 110. The fourth side plate 124 may be arranged on the opposite side of the third side plate 123. The fourth side plate 124 may be connected to the first side plate 121. The fourth side plate 124 may be connected to the second side plate 122. The fourth side plate 124 may include a step 162 recessed from the inside of the fixed part 100 to the outside. The step 162 of the fourth side plate 124 may correspond to the step 231 of the fourth side surface 214 of the moving part 200.

[0069] A Hall sensor (not shown) may be arranged on the fixed part 100. The Hall sensor may be arranged on the first side plate 121. The Hall sensor may be arranged between the connection portion connecting the first side plate 121 and the third side plate 123 and the first coil 151. In addition, the Hall sensor may be arranged on at least one of the first side plate 121 to the fourth side plate 124. For example, the Hall sensor may be arranged at the corner where the first side plate 121 and the third side plate 123 of the fixed part 100 meet. For example, the Hall sensor may be arranged at the corner where the second side plate 122 and the fourth side plate 124 of the fixed part 100 meet. The Hall sensor may detect the relative position of the moving part 200 relative to the fixed part 100. The Hall sensor may detect the relative position of the moving part 200 relative to the fixed part 100 by a sensing magnet (not shown). The sensing magnet may be arranged on the first side surface 211 of the moving part 200. The sensing magnet may be arranged at a position facing the Hall sensor. However, when the hall sensor is disposed on the first side surface 211 of the moving part 200 , the sensing magnet may be disposed on the first side plate 121 . The lens driving device 10 according to the present embodiment may include the moving part 200 .

[0070] The moving part 200 may be a movable part. The movable part may be a mover. The moving part 200 may be a mover. The moving part 200 may be movable relative to the fixed part 100. The moving part 200 may include an AF movable part. The moving part 200 may include an OIS movable part. The moving part 200 may be movable relative to the fixed part 100 in the direction of the optical axis. The moving part 200 may be movable relative to the fixed part 100 in a direction perpendicular to the optical axis together with the OIS movable part.

[0071] The moving part 200 may include a lens hole 201. The lens hole 201 of the moving part 200 may be a hole penetrating the moving part 200 in the optical axis direction. A lens may be arranged in the lens hole 201 of the moving part 200. The lens hole 201 of the moving part 200 may overlap with the lens hole 111 of the fixed part 100 in the optical axis direction.

[0072] The moving part 200 may include a first side surface 211. The first side surface 211 may face the first side plate 121. The first side surface 211 may overlap with the first side plate 121 in a direction perpendicular to the first side plate 121 and the optical axis direction. The first side surface 211 may overlap with the first yoke 410 in a direction perpendicular to the first yoke 410 and the optical axis direction. The first side surface 211 may be arranged in a direction opposite to the second side surface 212. The first side surface 211 may be connected to the third side surface 213. The first side surface 211 may be connected to the fourth side surface 214.

[0073] The first side surface 211 may include a first groove 221. The first groove 221 may be arranged at a position corresponding to the first protrusion 131 of the first side plate 121. The first protrusion 131 may be arranged in the first groove 221. The first ball 310 may be arranged in the first groove 221. The first groove 221 may be in contact with the first ball 310. The first groove 221 may be in two-point contact with the first ball 310. A driving magnet may be arranged in the first side surface 211. A first driving magnet 241 may be arranged in the first side surface 211. The first driving magnet 241 may be coupled to the first side surface 211. The first driving magnet 241 may be coupled to the first side surface 211 by an adhesive.

[0074] The moving part 200 may include a second side surface 212. The second side surface 212 may be arranged in a direction opposite to the first side surface 211. The second side surface 212 may be connected to the third side surface 213. The second side surface 212 may be connected to the fourth side surface 214. The second side surface 212 may include a step 232. The step 232 of the second side surface 212 may be a step recessed from the outer surface of the second side surface 212 toward the inside of the moving part 200. The step 232 of the second side surface 212 may correspond to the step 161 of the second side plate 122.

[0075] The moving part 200 may include a third side surface 213. The third side surface 213 may face the third side plate 123. The third side surface 213 may overlap with the third side plate 123 in a direction perpendicular to the third side plate 123 and the optical axis direction. The third side surface 213 may overlap with the second yoke 420 in a direction perpendicular to the second yoke 420 and the optical axis direction. The third side surface 213 may be arranged in a direction opposite to the fourth side surface 214. The third side surface 213 may be connected to the first side surface 211. The third side surface 213 may be connected to the second side surface 212.

[0076] The third side surface 213 may include a second groove 222. The second groove 222 may be arranged at a position corresponding to the second protrusion 132 of the third side plate 123. The second protrusion 132 may be arranged in the second groove 222. The second ball 210 may be arranged in the second groove 222. The second hole 222 may contact the second ball 320. The second hole 222 may contact the second ball 320 at two points. The driving magnet may be arranged on the third side surface 213. The second driving magnet 242 may be arranged on the third side surface 213. The second driving magnet 242 may be coupled to the third side surface 213. The second driving magnet 242 may be coupled to the third side surface 213 by an adhesive.

[0077] The moving part 200 may include a fourth side surface 214. The fourth side surface 214 may be arranged in a direction opposite to the third side surface 213. The fourth side surface 214 may be connected to the first side surface 211. The fourth side surface 214 may be connected to the second side surface 212. The fourth side surface 214 may include a step 231. The step 231 of the fourth side surface 214 may be a step recessed from the outer surface of the fourth side surface 214 toward the inner side of the moving part 200. The step of the fourth side surface 214 may correspond to the step 162 of the fourth side plate 124.

[0078] A Hall sensor (not shown) may be arranged on the moving part 200. The Hall sensor may be arranged on the first side surface 211. The Hall sensor may be arranged between the connecting part to which the first side surface 211 and the third side surface 213 are connected and the first driving magnet 241. The Hall sensor may detect the relative position of the moving part 200 relative to the fixed part 100. The Hall sensor may detect the relative position of the moving part 200 relative to the fixed part 100 by a sensing magnet (not shown). The sensing magnet may be arranged on the first side plate 121 of the fixed part 100. The sensing magnet may be arranged at a position opposite to the Hall sensor. However, when the Hall sensor is arranged in the first side plate 121 of the fixed part 100, the sensing magnet may be arranged on the first side surface 211.

[0079] The lens driving device 10 according to the present embodiment may include balls 310 and 320 .

[0080] The balls 310 and 320 may be AF balls. The balls 310 and 320 may support the moving part 200. The balls 310 and 320 may support the moving part 200 that moves in the optical axis direction relative to the fixed part 100. The balls 310 and 320 may guide the moving part 200 to move in the optical axis direction relative to the fixed part 100. Each of the balls 310 and 320 may include a plurality of balls. The plurality of balls may include a first ball 310 and a second ball.

[0081] The first ball 310 may be arranged on the first side plate 121. The first ball 310 may be arranged between the first side plate 121 and the fourth side plate 124. The first ball 310 may be arranged in the groove of the first protrusion 131. The first ball 310 may be arranged in the step area of ​​the first protrusion 131. The first ball 310 may contact the first protrusion 131. The first ball 310 may contact the first protrusion 131 at two points. The first ball 310 may be arranged in the first groove 221 of the first side surface 211. The first ball 310 may contact the first groove 221 at two points. The first ball 310 may contact the first protrusion 131 in the first groove 221. The first ball 310 may be arranged between the first protrusion 131 and the first groove 221.

[0082] The first ball 310 may include a plurality of first balls 310. The plurality of first balls 310 may be arranged in the optical axis direction. The plurality of first balls 310 may have the same diameter. Each of the plurality of first balls 310 may have a different diameter. Any of the plurality of first balls 310 may have a different diameter. The plurality of first balls 310 may have different diameters of any two of the plurality of first balls 310.

[0083] The second ball 320 may be arranged on the third side plate 123. The second ball 320 may be arranged between the second side plate 122 and the third side plate 123. The second ball 320 may be arranged in the groove of the second protrusion 132. The second ball 320 may be arranged in the step area of ​​the second protrusion 132. The second ball 320 may contact the second protrusion 132. The second ball 320 may contact the second protrusion 132 at two points. The second ball 320 may be arranged in the second groove 222 of the third side surface 213. The second ball 320 may contact the second groove 222 at two points. The second ball 320 may contact the second protrusion 132 in the second groove 222. The second ball 320 may be arranged between the second protrusion 132 and the second groove 222.

[0084] The second ball 320 may include a plurality of second balls 320. The plurality of second balls 320 may be arranged in the optical axis direction. The plurality of second balls 320 may have the same diameter. Each of the plurality of second balls 320 may have a different diameter. The plurality of second balls 320 may have different diameters.

[0085] The lens driving device 10 according to the present embodiment may include yokes 410 and 420 .

[0086] The yokes 410 and 420 may be metal plates. The yokes 410 and 420 may be a part of a cover of the lens driving device. In the figure, the cover of the lens driving device 10 is omitted, but the yokes 410 and 420 may correspond to a part of the cover of the lens driving device 10. The yokes 410 and 420 may extend from the cover of the lens driving device. The yokes 410 and 420 may be arranged to overlap with the driving magnets 241 and 242 in a direction perpendicular to the optical axis direction. The yokes 410 and 420 may be arranged outside the fixed part 100.

[0087] The yokes 410 and 420 may include a first yoke 410. The first yoke 410 may be arranged to overlap with the first side plate 121 of the fixing part 100 in a direction perpendicular to the optical axis direction. The yokes 410 and 420 may include a second yoke 420. The second yoke 420 may be arranged to overlap with the third side plate 123 of the fixing part 100 in a direction perpendicular to the optical axis direction.

[0088] The moving part 200 can move a predetermined distance in the direction of the first angular region by the magnetic force applied between the first yoke 410 and the first driving magnet 241 and the magnetic force applied between the second yoke 420 and the second driving magnet 242. The moving part 200 can be in close contact with the first angular region inside the fixed part 100 by the magnetic force applied between the first yoke 410 and the first driving magnet 241 and the magnetic force applied between the second yoke 420 and the second driving magnet 242. Here, the first angular region may be the region where the first side plate 121 and the third side plate 123 are connected. The first angular region may be the region between the first side plate 121 and the third side plate 123.

[0089] Since the moving part 200 is in close contact with the first corner region inside the fixed part 100 , the moving part 200 may be stably supported by the first ball 310 and the second ball 320 disposed between the moving part 200 and the fixed part 100 .

[0090] Since the moving part 200 is in close contact with the first angular region inside the fixed part 100 and is supported by the first ball 310 and the second ball 320 of the moving part 200, the moving part 200 can stably move in the optical axis direction inside the fixed part 100. In addition, since the moving part 200 is driven by the driving force due to the interaction between the first driving magnet 241 and the first coil 151 and the driving force due to the interaction between the second driving magnet 242 and the second coil 151, the moving part 200 can be driven with a larger driving force than when the moving part 200 is driven by one driving magnet and one coil.

[0091] Hereinafter, a lens driving device according to a first modification will be described with reference to the drawings. Description of the same contents as those of the above embodiment regarding the first modified embodiment may be omitted below.

[0092] Fig.10 is a perspective view of a fixing portion in a lens driving device according to a first modified embodiment; Fig.11 is a plan view of a fixing portion in a lens driving device according to a first modified embodiment; Fig.12 is a perspective view of a moving portion in a lens driving device according to a first modified embodiment; Fig.13 is a plan view of a moving portion in a lens driving device according to a first modified embodiment; and Fig.14 1 is a diagram showing that a moving portion is tilted from a fixed portion in a lens driving device according to a first modified embodiment.

[0093] The lens driving device 10 according to the first modified embodiment may include a fixing portion 1100 .

[0094] The fixing portion 1100 may include a first side plate 1121. The first side plate 1121 may be a side surface of the fixing portion 1100. The first side plate 1121 may protrude from the upper surface of the lower plate 1110. The first side plate 1121 may be arranged on the opposite side of the second side plate 1122. The first side plate 1121 may be connected to the third side plate 1123. The first side plate 1121 may be connected to the fourth side plate 1124. The first side plate 1121 may include a hole. The hole 1141 of the first side plate 1121 may be a hole formed in a direction perpendicular to the optical axis direction. The first coil 1151 may be arranged in the hole 1141 of the first side plate 1121. The hole 1141 of the first side plate 1121 may have a rectangular shape.

[0095] The first side plate 1121 may include a first protrusion 1131. The first protrusion 1131 may protrude from the inner surface of the first side plate 1121 toward the inside of the fixing part 1100. The first protrusion 1131 may include a step that is recessed from the inside to the outside of the fixing part 1100. The step of the first protrusion 1131 may include a plurality of steps. The first protrusion 1131 may include a groove. The groove of the first protrusion 1131 may be a groove in which the first ball 3310 to be described later is arranged.

[0096] The second side plate 1122 may be a side surface of the fixing portion 1100. The second side plate 1122 may protrude from an upper surface of the lower plate 1110. The second side plate 1122 may be arranged on an opposite side of the first side plate 1121. The second side plate 1122 may be connected to the third side plate 1123. The second side plate 1122 may be connected to the fourth side plate 1124.

[0097] The second side plate 1122 may include a hole 1142. The hole 1142 of the second side plate 1122 may be a hole formed in a direction perpendicular to the optical axis direction. The second coil 1152 may be arranged in the hole of the second side plate 1122. The hole 1142 of the second side plate 1122 may have a rectangular shape. The second side plate 1122 may include a second protrusion 1132. The second protrusion 1132 may protrude from the inner surface of the second side plate 1122 toward the inside of the fixed part 1100. The second protrusion 1132 may include a groove 1142. The groove 1142 of the second protrusion 1132 may be a groove in which the second ball 3320 is arranged. The groove of the second protrusion 1132 may be a groove that is recessed in a direction from the second side plate 1122 toward the inside of the fixed part 1100. The second protrusion 1132 may be rotationally symmetrical with respect to the first protrusion 1131 relative to the optical axis.

[0098] The third side plate 1123 may be a side surface of the fixing portion 1100. The third side plate 1123 may protrude from the upper surface of the lower plate 1110. The third side plate 1123 may be arranged on an opposite side of the fourth side plate 1124. The third side plate 1123 may be connected to the first side plate 1121. The third side plate 1123 may be connected to the second side plate 1122.

[0099] The fourth side plate 1124 may be a side surface of the fixed portion 1100. The fourth side plate 1124 may protrude from the upper surface of the lower plate 1110. The fourth side plate 1124 may be arranged on the opposite side of the third side plate 1123. The fourth side plate 1124 may be connected to the first side plate 1121. The fourth side plate 1124 may be connected to the second side plate 1122. The fourth side plate 1124 may include a step 1151 recessed from the inside of the fixed portion 1100 toward the outside. The step 1151 of the fourth side plate 1124 may correspond to the step 1151 of the fourth side surface 1124 of the moving portion.

[0100] The lens driving device 10 according to the first embodiment assembly may include a moving portion 2200 .

[0101] The moving part 2200 may include a first side surface 2211. The first side surface 2211 may face the first side plate 1121. The first side surface 2211 may overlap with the first side plate 1121 in a direction perpendicular to the optical axis direction and the first side plate 1121. The first side surface 2211 may overlap with the first yoke 4410 in a direction perpendicular to the optical axis direction. The first side surface 2211 may be arranged in a direction opposite to the second side surface 2212. The first side surface 2211 may be connected to the third side surface 2213. The first side surface 2211 may be connected to the fourth side surface 2214.

[0102] The first side surface 2211 may include a first groove 2221. The first groove 2221 may be arranged at a position corresponding to the first protrusion 1131 of the first side plate 2211. The first protrusion 1131 may be arranged in the first groove 2221. The first ball 3310 may be arranged in the first groove 2221. The first groove 2221 may contact the first ball 3310. The first groove 2221 may contact the first ball 3310 at two points. The driving magnets 2241 and 2242 may be arranged at the first side surface 2211. The first driving magnet 2241 may be arranged at the first side surface 2211. The first driving magnet 2241 may be coupled to the first side surface 2211. The first driving magnet 2241 may be coupled to the first side surface 2211 by an adhesive.

[0103] The moving part 2200 may include a second side surface 2212. The second side surface 2212 may face the second side plate 1122. The second side surface 2212 may overlap with the second side plate 1122 in a direction perpendicular to the second side plate 1122 and the optical axis direction. The second side surface 2212 may overlap with the second yoke 4420 in a direction perpendicular to the second yoke 4420 and the optical axis direction. The second side surface 2212 may be arranged in a direction opposite to the first side surface 2211. The second side surface 2212 may be connected to the third side surface 2213. The second side surface 2212 may be connected to the fourth side surface 2214.

[0104] The second side surface 2212 may include a second groove 2222. The second groove 2222 may be arranged at a position corresponding to the second protrusion 1132 of the second side plate 1122. The second groove 2222 may be rotationally symmetrical with respect to the first groove 2221 and the optical axis. The second protrusion 1132 may be arranged in the second groove 2222. The second ball 3320 may be arranged in the second groove 2222. The second groove 2222 may contact the second ball 3320. The second groove 2222 may contact the second ball 3320 at two points. The driving magnet may be arranged on the second side surface 2212. The second driving magnet 2242 may be arranged on the second side surface. The second driving magnet 2242 may be coupled to the second side surface 2212. The second driving magnet 2242 may be coupled to the second side surface 2212 by an adhesive.

[0105] The moving part 2200 may include a third side surface 2213. The third side surface 2213 may be arranged in a direction opposite to the fourth side surface 2214. The third side surface 2213 may be connected to the first side surface 2211. The third side surface 2213 may be connected to the second side surface 2212.

[0106] The moving part may include a fourth side surface 2214. The fourth side surface 2214 may be arranged in a direction opposite to the third side surface 2213. The fourth side surface 2214 may be connected to the first side surface 2211. The fourth side surface 2214 may be connected to the second side surface 2212. The fourth side surface 2214 may include a step 2231. The step 2231 of the fourth side surface 2214 may be a step recessed from the outer surface of the fourth side surface 2214 toward the inside of the moving part. The step 2231 of the fourth side surface 2214 may correspond to the step 1151 of the fourth side plate 1124.

[0107] The lens driving device 10 according to the first modified embodiment may include balls 3310 and 3320 .

[0108] The balls 3310 and 3320 may be AF balls. The balls 3310 and 3320 may support the moving part 2200. The balls 3310 and 3320 may support the moving part 2200 that moves in the optical axis direction relative to the fixed part 1100. The balls 3310 and 3320 may include a plurality of balls. The plurality of balls may include a first ball 3310 and a second ball 3320.

[0109] The first ball 3310 may be arranged in the first side plate 1121. The first ball 3310 may be arranged in the groove of the first protrusion 1131. The first ball 3310 may be arranged in the step area of ​​the first protrusion 1131. The first ball 3310 may contact the first protrusion 1131. The first ball 3310 may contact the first protrusion 1131 at two points. The first ball 3310 may be arranged in the first groove 2221 of the first side surface 2211. The first ball 3310 may contact the first groove 2221 at two points. The first ball 3310 may contact the first groove 2221. The first ball 3310 may contact the first protrusion 1131 in the first groove 2221.

[0110] The lens driving device 10 according to the first modified embodiment may include yokes 4410 and 4420 .

[0111] The yoke may include a first yoke 4410. The first yoke 4410 may be arranged to overlap with the first side plate 1121 of the fixing portion 1100 in a direction perpendicular to the optical axis direction. Fig. 9 , the center of the first yoke 4410 in the longitudinal direction may be disposed on the right side of the center of the lens hole.

[0112] The yoke may include a second yoke 4420. The second yoke 4420 may be arranged to overlap with the second side plate 1122 of the fixing portion 1100 in a direction perpendicular to the optical axis direction. Fig. 9 , the center of the second yoke 4420 in the longitudinal direction can be arranged on the left side of the center of the lens hole.

[0113] Reference Fig.14 , the moving part 2200 can be tilted around the optical axis in the fixed part 1100 by the magnetic force between the first driving magnet 2241 and the first yoke 4410 and the magnetic force between the second driving magnet 2242 and the second yoke 4420 .

[0114] The moving part 2200 can be tilted relative to the optical axis by the magnetic force applied between the first yoke 4410 and the first driving magnet 2241 and the magnetic force applied between the second yoke 420 and the second driving magnet 2242. The moving part 2200 can be in close contact with the first ball 3310 and the second ball 332 by the magnetic force applied between the first yoke 4410 and the first driving magnet 2241 and the magnetic force applied between the second yoke 4420 and the second side plate 1122. The fixed part 1100 can be in close contact with the first ball 3310 and the second ball 3320. Therefore, the moving part 1100 can be stably supported by the first ball 3310 and the second ball 3320, and the moving part 2200 can stably move in the optical axis direction inside the fixed part 1100. In addition, since the moving part 2200 is driven by the driving force due to the interaction between the first driving magnet 2241 and the first coil 1151 and the driving force due to the interaction between the second driving magnet 2242 and the second coil 1151, the moving part 2200 can be driven with a greater driving force than when the moving part 2200 is driven by one driving magnet and one coil.

[0115] Hereinafter, a lens driving device according to a second modified embodiment will be described with reference to the accompanying drawings. Description of the same contents as the above embodiment regarding the modified embodiment may be omitted below.

[0116] The lens driving device 10 according to the second modified embodiment may include a fixing portion 5100 .

[0117] The fixed part 5100 may be a stator. The fixed part 5100 may be a part that is relatively fixed when the moving part 5200 moves. The fixed part 5100 may include: a first side plate 5121; a second side plate 5122, which is arranged in a direction opposite to the first side plate 5121; a third side plate 5122, which is connected to the first side plate 5121 and the second side plate 5122; and a fourth side plate 5124, which is arranged in a direction opposite to the first side plate 5121 and the second side plate 5122.

[0118] The first side plate 5121 may include a first protrusion 5131. The first protrusion 5131 may protrude from the inner surface of the first side plate 5121 toward the inner side of the fixing portion 5100. The first protrusion 5131 may be arranged at a corner area between the first side plate 5121 and the third side plate 5123. The third side plate 5123 may include a second protrusion 5132. The second protrusion 5132 may protrude from the inner surface of the third side plate 5123 toward the inner side of the fixing portion 5100. The second protrusion 5132 may be arranged at a corner area between the first side plate 5121 and the third side plate 5123.

[0119] The lens driving device 10 according to the second modified embodiment may include a moving portion 5200 .

[0120] The moving part 5200 may include: a first side surface 5211; a second side surface 5212, which is arranged in a relative direction to the first side surface; a third side surface 5213, which is connected to the first side surface 5211 and the second side surface 5212; and a fourth side surface 5214, which is arranged in a relative direction to the third side surface 5213.

[0121] The first side surface 5211 may include a first groove. The first groove may be arranged at a position corresponding to the first protrusion 5131 of the first side plate 5121. The first protrusion 5131 may be arranged in the first groove. The first ball 5310 may be arranged in the first groove.

[0122] The first driving magnet may be arranged on the first side surface 5211. The first driving magnet may be arranged to overlap with the first yoke 5410 in a direction perpendicular to the optical axis. The first driving magnet may be arranged to overlap with the first coil arranged on the first side plate 5121 in a direction perpendicular to the optical axis.

[0123] The third side surface 5213 may include a second groove. The second groove may be arranged at a position corresponding to the second protrusion 5132 of the third side plate 5123. The second protrusion 5132 may be arranged in the second groove. The second ball 210 may be arranged in the second groove 5222.

[0124] The second driving magnet may be arranged on the third side surface 5213. The second driving magnet may be arranged to overlap with the second yoke 5420 in a direction perpendicular to the optical axis. The second driving magnet may be arranged to overlap with the second coil arranged on the third side plate 5123 in a direction perpendicular to the optical axis.

[0125] The lens driving device 10 according to the second modified embodiment may include a first ball 5310 and a second ball 5320 .

[0126] The first ball 5310 and the second ball 5320 may be arranged at a corner region between the first side plate 5121 and the third side plate 5123. The first ball 5310 and the second ball 5320 may be arranged to be spaced apart from each other.

[0127] The lens driving device 10 according to the second modified embodiment may include yokes 5410 and 5420. The yokes 5410 and 5420 may include a first yoke 5410. The first yoke 5410 may be arranged to overlap with a first driving magnet arranged on a first side surface 5211 in a direction perpendicular to the optical axis direction. The yokes 5410 and 5420 may include a second yoke 5420. The second yoke 5420 may be arranged to overlap with a second driving magnet arranged on a third side surface 5213 in a direction perpendicular to the optical axis direction.

[0128] The moving part 5200 can be moved a predetermined distance in the direction of the first angular region by a magnetic force acting between the first yoke 5410 and the first driving magnet arranged on the first side surface 5211 and a magnetic force acting between the second yoke 5420 and the second driving magnet arranged on the third side surface 5213. The moving part 5200 can be moved a predetermined distance in the direction of the first angular region by a magnetic force acting between the first yoke 5410 and the first driving magnet arranged on the first side surface 5211 and the second driving magnet arranged on the second yoke 5420 and the third side surface 5213. In this case, the first angular region may be a region where the first side plate 5121 and the third side plate 5123 are connected. The first angular region may be a region between the first side plate 5121 and the third side plate 5213.

[0129] Since the moving part 5200 is in close contact with the first corner region inside the fixed part 5100 , the moving part 5200 may be stably supported by the first ball 5310 and the second ball 5320 disposed between the moving part 5200 and the fixed part 5100 .

[0130] Since the moving part 5200 is in close contact with the first angular region inside the fixed part 5100 and is supported by the first ball 5310 and the second ball 5320, the moving part 5200 can stably move in the optical axis direction inside the fixed part 5100. In addition, since the moving part 5200 is driven by the driving force due to the interaction between the first driving magnet and the first coil and the driving force due to the interaction between the second driving magnet and the second coil, the moving part 5200 can be driven with a larger driving force than when the moving part 5200 is driven by one driving magnet and one coil.

[0131] Hereinafter, auto focus (AF) driving of the lens driving device 10 will be described with reference to the accompanying drawings.

[0132] Figures 16 to 18 FIG. 1 is a diagram for explaining autofocus driving of the lens driving device according to the present embodiment. Fig.16 is a cross-sectional view showing the appearance of the moving portion in an initial state in which no current is applied to the first coil and the second coil. Fig.17is a cross-sectional view showing an appearance that the moving portion moves upward in the optical axis direction when a forward current is applied to the first coil and the second coil. Fig.18 is a diagram showing that when reverse current is applied to the first coil and the second coil, the moving part is Fig.17 A cross-sectional view of the appearance in which the position of the moving part moves downward in the optical axis direction.

[0133] The moving part may be disposed on the lower plate 110 of the fixed part 100 at an initial position where no current is applied to the first coil 151 and the second coil 152 .

[0134] When a forward current is applied to the first coil 151, the first driving magnet 241 can move upward in the optical axis direction by the electromagnetic interaction between the first coil 151 and the first driving magnet 241. When a forward current is applied to the second coil 152, the second driving magnet 242 can move upward in the optical axis direction by the electromagnetic interaction between the second coil 152 and the second driving magnet 242. At this time, the moving part 200 can move upward in the optical axis direction together with the first driving magnet 241 and the second driving magnet 242. In addition, the lens of the lens hole 111 can move upward in the optical axis direction together with the moving part 200. Therefore, the distance between the lens and the image sensor is changed, so that the focus of the image formed on the image sensor through the lens can be adjusted.

[0135] When a reverse current is applied to the first coil 151, the first driving magnet 241 can move downward in the optical axis direction by the electromagnetic interaction between the first coil 151 and the first driving magnet 241. When a reverse current is applied to the second coil 152, the second driving magnet 242 can move downward in the optical axis direction by the electromagnetic interaction between the second coil 152 and the second driving magnet 242. At this time, the moving part 200 can move downward in the optical axis direction together with the first driving magnet 241 and the second driving magnet 242. In addition, the lens of the lens hole 111 can move downward in the optical axis direction together with the moving part 200. Therefore, the distance between the lens and the image sensor is changed, so that the focus of the image formed on the image sensor through the lens can be adjusted.

[0136] Fig.19 is an exploded perspective view of the camera device according to this embodiment.

[0137] The camera device 10A may include a lens module 20. The lens module 20 may include at least one lens. The lens may be arranged at a position corresponding to the image sensor 60. The lens module 20 may include a lens and a lens barrel.

[0138] The camera device 10A may include an optical filter 30. The optical filter 30 may block light of a specific frequency band from passing through the lens module 20 and being incident on the image sensor 60. The optical filter 30 may be arranged parallel to the xy plane. The optical filter 30 may be arranged between the lens module 20 and the image sensor 60. The optical filter 30 may be arranged in the sensor base 40. In a modified embodiment, the optical filter 30 may be arranged in the base 110. The optical filter 30 may include an infrared filter. The infrared filter may block light in an infrared region from being incident on the image sensor 60.

[0139] The camera device 10A may include a sensor base 40. The sensor base 40 may be arranged between the lens driving device 10 and the printed circuit board 50. The sensor base 40 may include a protrusion 41 on which the filter 30 is arranged. An opening may be formed in a portion of the sensor base 40 on which the filter 30 is arranged so that light passing through the filter 30 may be incident on the image sensor 60. An adhesive member may couple or attach the base 110 of the lens driving device 10 to the sensor base 40. In addition, the adhesive member may be used to prevent foreign matter from being introduced into the interior of the lens driving device 10. The adhesive member may include any one or more of an epoxy resin, a thermosetting adhesive, and an ultraviolet curing adhesive.

[0140] The camera device 10A may include a printed circuit board (PCB) 50. The printed circuit board 50 may be a substrate or a circuit board. The lens driving device 10 may be arranged on the printed circuit board 50. The sensor base 40 may be arranged between the printed circuit board 50 and the lens driving device 10. The printed circuit board 50 may be electrically connected to the lens driving device 10. The image sensor 60 may be arranged on the printed circuit board 50. Various circuits, elements, control units, etc. may be provided on the printed circuit board 50 to convert an image formed on the image sensor 60 into an electrical signal and transmit it to an external device.

[0141] The camera device 10A may include an image sensor 60. The image sensor 60 may be configured so that light passing through the lens and the filter 30 is incident thereon to obtain an image. The image sensor 60 may be mounted on a printed circuit board 50. The image sensor 60 may be electrically connected to the printed circuit board 50. For example, the image sensor 60 may be coupled to the printed circuit board 50 by surface mounting technology (SMT). As another example, the image sensor 60 may be coupled to the printed circuit board 50 by flip chip technology. The image sensor 60 may be arranged so that its optical axis is aligned with the optical axis of the lens. That is, the optical axis of the image sensor 60 and the optical axis of the lens may be aligned. The image sensor 60 may convert the light irradiated onto the effective image area of ​​the image sensor 60 into an electrical signal. The image sensor 60 may be any one of a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID.

[0142] The camera device 10A may include a motion sensor 70. The motion sensor 70 may be mounted on the printed circuit board 50. The motion sensor 70 may be electrically connected to the control unit 80 through a circuit pattern provided on the printed circuit board 50. The motion sensor 70 may output rotational angular velocity information due to movement of the camera device 10A. The motion sensor 70 may include a dual-axis or tri-axis gyro sensor or an angular velocity sensor.

[0143] The camera device 10A may include a control unit 80. The control unit 80 may be arranged on the printed circuit board 50. The control unit 80 may be electrically connected to the coil 330 of the lens driving device 10. The control unit 80 may independently control the direction, intensity, amplitude, etc. of the current supplied to the coil 330. The control unit 80 may control the lens driving device 10 to perform an autofocus function and / or a hand shake correction function. In addition, the control unit 80 may perform autofocus feedback control and / or hand shake correction feedback control on the lens driving device 10.

[0144] The camera device 10A may include a connector 90. The connector 90 may be electrically connected to the printed circuit board 50. The connector 90 may include a port for electrically connecting to an external device.

[0145] Hereinafter, an optical instrument according to the present embodiment is described with reference to the drawings.

[0146] Fig.19 is a perspective view of an optical instrument according to the present embodiment.

[0147] The optical instrument 1 may include at least one of a mobile phone, a cellular phone, a portable terminal, a mobile terminal, a smart phone, a smart tablet, a portable smart device, a digital camera, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), and a navigation device. The optical instrument 1 may include any device for taking a video or a picture.

[0148] The optical instrument 1 may include a main body 20. The optical instrument 1 may include a camera device 10A. The camera device 10A may be arranged in the main body 20. The camera device 10A may photograph a subject. The optical instrument 1 may include a display. The display may be arranged in the main body 20. The display may output one or more of an image and a video photographed by the camera device 10A. The display may be arranged on a first surface of the main body 20. The camera device 10A may be arranged on one or more of a first surface of the main body 20 and a second surface opposite to the first surface. As shown in FIG. 22, in the camera device 10A, three cameras may be arranged in a vertical direction. As shown in FIG. 23, in the camera device 10A, three cameras may be arranged in a horizontal direction.

[0149] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, it will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing its technical spirit or basic features. Therefore, it should be understood that the embodiments described above are illustrative and not restrictive in all aspects.

Claims

1. A lens driving device, comprising: Fixed part; a moving part, the moving part being arranged inside the fixed part; a driving magnet disposed on the moving part; a coil arranged on the fixed portion to correspond to the driving magnet; as well as a ball arranged between the fixed part and the moving part, wherein the ball guides the moving part to move relative to the fixed part in the direction of the optical axis, The fixing part includes: a first side plate and a second side plate arranged opposite to each other; a third side plate and a fourth side plate connected to the first side plate and the second side plate and arranged opposite to each other. The moving part includes: a first side and a second side arranged opposite to each other; and a third side and a fourth side arranged opposite to each other and connecting the first side surface and the second side surface. wherein the first side plate to the fourth side plate face the first side surface to the fourth side surface, wherein the driving magnet causes the moving part to move in the direction of the optical axis via interaction with the coil, wherein the driving magnet comprises: a first driving magnet, the first driving magnet being arranged on the first side surface of the moving part; and a second driving magnet, the second driving magnet being arranged on the third side surface of the moving part, and Wherein, the ball includes: a first ball, the first ball is arranged in a first corner area, the first side plate and the fourth side plate of the fixed part are connected in the first corner area; and a second ball, the second ball is arranged in a second corner area, the second side plate and the third side plate of the fixed part are connected in the second corner area.

2. The lens driving device according to claim 1, in, The first side plate includes a first protrusion protruding from an inner surface of the first side plate, wherein the first protrusion comprises a groove, and Wherein, the first ball is arranged in the groove of the first side plate.

3. The lens driving device according to claim 2, in, The third side plate includes a second protrusion protruding from an inner surface of the third side plate, wherein the second protrusion comprises a groove, and Wherein, the second ball is arranged in the groove of the third side plate.

4. The lens driving device according to claim 3, in, The first side surface includes a first groove formed on a surface of the first side surface inwardly of the moving portion, and Wherein, the third side surface includes a second groove formed on the surface of the third side surface toward the moving part.

5. The lens driving device according to claim 4, in, The first protrusion of the first side plate is arranged in the first groove of the first side surface, and Wherein, the second protrusion of the third side plate is arranged in the second groove of the third side surface.

6. The lens driving device according to claim 5, in, The first ball contacts the first protrusion of the first side plate and the first groove of the first side surface, and The second ball is in contact with the second protrusion of the third side plate and the second groove of the third side surface.

7. The lens driving device according to claim 1, comprising: a first yoke disposed outside the fixing portion and overlapping the first side plate in a direction perpendicular to the optical axis direction; as well as A second yoke is disposed outside the fixing portion and overlaps the third side plate in a direction perpendicular to the optical axis direction.

8. The lens driving device according to claim 1, in, The first ball includes a plurality of first balls, wherein the second ball comprises a plurality of second balls, wherein the plurality of first balls are arranged in the direction of the optical axis, and Wherein, the plurality of second balls are arranged in the direction of the optical axis.

9. A lens driving device, comprising: Fixed part; a moving part, the moving part being arranged inside the fixed part; a driving magnet disposed on the moving part; a coil arranged on the fixed portion to correspond to the driving magnet; as well as a ball arranged between the fixed part and the moving part, wherein the ball guides the moving part to move relative to the fixed part in the direction of the optical axis, The fixing part includes: a first side plate and a second side plate arranged opposite to each other; a third side plate and a fourth side plate connected to the first side plate and the second side plate and arranged opposite to each other. The moving part includes: a first side and a second side arranged opposite to each other; and a third side and a fourth side arranged opposite to each other and connecting the first side surface and the second side surface. wherein the first side plate to the fourth side plate face the first side surface to the fourth side surface, wherein the driving magnet causes the moving part to move in the direction of the optical axis via interaction with the coil, wherein the driving magnet comprises: a first driving magnet, the first driving magnet being arranged on the first side surface of the moving part; and a second driving magnet, the second driving magnet being arranged on the third side surface of the moving part, and Wherein, the ball includes: a first ball, the first ball is arranged in a first corner area, the first side plate and the third side plate of the fixed part are connected in the first corner area; and a second ball, the second ball is arranged in a second corner area, the second side plate and the fourth side plate of the fixed part are connected in the second corner area.

10. The lens driving device according to claim 9, in, The first side plate includes a protrusion protruding from an inner surface of the first side plate, and Wherein, the second side plate includes a protrusion protruding from an inner surface of the second side plate.

Images