Camera arrangement and optical device

Abstract

This embodiment relates to a camera device, which includes: a base; a retainer disposed on the base; a drive unit for moving the retainer relative to the base along an optical axis; and balls disposed between the base and the retainer. The base includes a grooved track extending along the optical axis, the balls include a first ball and a second ball disposed on the track of the base, and the base includes a first protrusion projecting from the track of the base. The first protrusion of the base is disposed between the first ball and the second ball along the optical axis, and the length of the first protrusion in a direction perpendicular to the optical axis is greater than the radius of the second ball.

Description

Technical Field

[0001] This embodiment relates to camera devices and optical equipment. Background Technology

[0002] Recent smartphones are equipped with camera features that can capture high-resolution photos and videos.

[0003] In particular, recent smartphone cameras are employing autofocus functionality that automatically adjusts the focus based on the distance to the object. This autofocus function is executed as the lens moves relative to the image sensor along the optical axis. Therefore, the lens drive mechanism can be equipped with balls that guide the movement of the moving part, on which the lens is mounted. To ensure sufficient clearance between the actually driven balls, space balls with a smaller diameter than the driven balls can be placed between them. However, this increases the number of components and introduces problems such as the risk of slippage between the balls and the risk of locking due to the balls becoming stuck and unable to rotate. This problem is exacerbated, especially when designing actuators with greater heights, as a large number of space balls are required.

[0004] (Patent Document 1) KR 10-2020-0116402 A. Summary of the Invention

[0005] Technical topics

[0006] This embodiment aims to provide a camera device that eliminates the risk of slippage and locking between the balls.

[0007] Furthermore, this embodiment aims to provide a camera device that reduces the number of parts by omitting the spacer balls.

[0008] Technical solutions

[0009] The camera device according to this embodiment includes: a base; a retainer disposed on the base; a drive unit for moving the retainer relative to the base along an optical axis; and balls disposed between the base and the retainer, wherein the base includes a groove-shaped track extending along the optical axis, the balls include a first ball and a second ball disposed on the track of the base, the base includes a first protrusion protruding from the track of the base, the first protrusion of the base is disposed between the first ball and the second ball along the optical axis, and the length of the first protrusion in a direction perpendicular to the optical axis may be greater than the radius of the second ball.

[0010] The retainer includes a grooved track extending along the optical axis and a second protrusion protruding from the track of the retainer, and the second protrusion of the retainer may be disposed between the first ball and the first protrusion of the base along the optical axis.

[0011] When the holder moves to its maximum extent in the upward direction along the optical axis, the first protrusion of the base and the second protrusion of the holder can be spaced apart from each other.

[0012] The base includes a third protrusion, and the first ball can be disposed between the third protrusion of the base and the second protrusion of the retainer along the optical axis.

[0013] The retainer includes a fourth protrusion, and the second ball can be disposed between the first protrusion of the base and the fourth protrusion of the retainer along the optical axis.

[0014] When the retainer is moved by the drive unit, the balls can roll along the track at the base.

[0015] The second protrusion of the retainer can overlap with the first protrusion of the base in the optical axis direction.

[0016] The length of the first protrusion of the base in the optical axis direction can be greater than the diameter of the second ball.

[0017] The length of the second protrusion of the retainer in the optical axis direction can be greater than the diameter of the first ball.

[0018] The diameter of the first ball bearing and the diameter of the second ball bearing can be the same.

[0019] The drive unit includes a magnet disposed on a retainer and a coil that interacts with the magnet. The retainer's track includes a first track disposed on one side of the magnet and a second track disposed on the other side of the magnet. A first ball and a second ball are disposed on the first track, and the balls may include a third ball and a fourth ball disposed on the second track.

[0020] The base includes a fifth protrusion disposed between the third ball and the fourth ball along the optical axis, and the length of the fifth protrusion of the base in the optical axis direction may be shorter than the length of the first protrusion of the base.

[0021] The base includes an upper track disposed above the first protrusion and a lower track disposed below the first protrusion, and the length of the upper track in the optical axis direction may be different from the length of the lower track in the optical axis direction.

[0022] The camera device may include a printed circuit board, an image sensor mounted on the printed circuit board, and a lens coupled to a retainer.

[0023] The camera device according to this embodiment includes: a base; a retainer disposed on the base; a drive unit for moving the retainer relative to the base; and balls disposed between the base and the retainer, wherein the base includes a grooved track, the balls include a first ball and a second ball disposed on the track of the base, the base includes a first protrusion protruding from the track of the base, the first protrusion of the base is disposed between the first ball and the second ball, the retainer includes a grooved track thereon on which the first ball and the second ball are disposed and a second protrusion protruding from the track of the retainer, and the second protrusion of the retainer may be disposed between the first ball and the second ball.

[0024] The optical device according to this embodiment may include a body, a camera device disposed on the body, and a display disposed on the body and outputting at least one of the images and videos captured by the camera device.

[0025] Beneficial effects

[0026] This implementation eliminates the risk of slippage and locking between the balls. Therefore, drive stability during autofocus operation can be improved.

[0027] In addition, because the number of parts is reduced by omitting the spacer balls, assembly becomes easier and manufacturing costs can be reduced. Attached Figure Description

[0028] Figure 1 This is a perspective view of the lens driving device according to this embodiment.

[0029] Figure 2 It is along Figure 1 The cross-sectional view taken by line AA.

[0030] Figure 3 It is along Figure 1 The cross-sectional view of line BB.

[0031] Figure 4a (a) is a cross-sectional view illustrating the arrangement of the balls and related components with the retainer having moved to its lowest point along the optical axis. Figure 4a (b) is a cross-sectional view illustrating the arrangement of the balls and related components in the state where the retainer has moved to the uppermost end along the optical axis.

[0032] Figure 4b This is a cross-sectional view illustrating the arrangement structure of the balls and tracks of the lens drive device according to this embodiment.

[0033] Figure 5This is a cross-sectional view illustrating the arrangement structure of the balls and related components of the lens driving device according to this embodiment.

[0034] Figure 6 This is an exploded perspective view of the lens driving device according to this embodiment.

[0035] Figure 7 From and Figure 6 An exploded stereoscopic view of the lens drive device viewed from different directions.

[0036] Figure 8 This is a perspective view of the lens driving device according to this embodiment, in which the cover is omitted.

[0037] Figure 9 This is a perspective view illustrating the fixed part and related components of the lens driving device according to this embodiment.

[0038] Figure 10 This is a perspective view illustrating the moving part and related components of the lens driving device according to this embodiment.

[0039] Figure 11 This is a perspective view illustrating the fixed part and related components of a lens driving device according to a modified embodiment.

[0040] Figure 12 This is a perspective view illustrating the moving part and related components of a lens driving device according to a modified embodiment.

[0041] Figure 13 This is a cross-sectional view illustrating the arrangement structure of the balls and related components of a lens drive device according to a modified embodiment.

[0042] Figure 14 This is a diagram illustrating the autofocus drive of the lens drive device according to this embodiment.

[0043] Figure 15 This is an exploded perspective view of the camera device according to this embodiment.

[0044] Figure 16 This is a perspective view of the optical device according to this embodiment. Detailed Implementation

[0045] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] However, the technical concept of the present invention is not limited to the few embodiments described, but can be implemented in various forms, and within the scope of the technical concept of the present invention, one or more of the constituent elements can be selectively combined or substituted between embodiments.

[0047] Furthermore, unless explicitly defined and described, the terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having meanings that are generally understood by those skilled in the art, and general terms such as those defined in dictionaries may be interpreted in light of their meaning in the context of the relevant art.

[0048] Furthermore, the terminology used in this specification is for describing embodiments and is not intended to limit the invention.

[0049] In this specification, unless specifically stated in the phrase, the singular form may include the plural form, and when described as “at least one (or more than one) of A, B and C”, it may include one or more of all combinations that can be made of A, B and C.

[0050] Furthermore, when describing components of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended only to distinguish components from other components, and they do not limit the nature, order, or sequence of the components.

[0051] Furthermore, when a component is described as “connected,” “linked,” or “interconnected” to another component, the component is not only directly connected, linked, or interconnected to the other component, but may also include cases where the component is “connected,” “linked,” or “interconnected” to each other in such a way that another component is placed between them.

[0052] Additionally, when described as being formed or positioned "above" or "below" each component, "above" or "below" means that it includes not only the case where two components are in direct contact, but also the case where one or more other components are formed or positioned between the two components. Furthermore, when expressed as "above" or "below," it means that it can include not only an upward direction relative to a component, but also a downward direction relative to a component.

[0053] The term "optical axis direction" as used below (see below) Figure 14 "OA" is defined as the direction of the optical axis of the lens and / or image sensor connected to the lens drive device.

[0054] The term "vertical direction" as used below can refer to a direction parallel to or the same as the optical axis. The vertical direction can correspond to the "z-axis direction." The term "horizontal direction" as used below can refer to a direction perpendicular to the vertical direction. That is, the horizontal direction can be perpendicular to the optical axis. Therefore, the horizontal direction can include both the "x-axis direction" and the "y-axis direction."

[0055] The term "autofocus (AF) function" as used below is defined as follows: by adjusting the distance to the image sensor based on the distance to the object, the lens is moved along the optical axis to automatically focus on the object, thereby obtaining a sharp image of the object on the image sensor. Furthermore, "closed-loop autofocus (CLAF) control" is defined as: by sensing the distance between the image sensor and the lens to control the lens position in real time, thereby improving the accuracy of focus adjustment.

[0056] In the following text, any one of the "x-axis direction", "y-axis direction" and "optical axis direction" may be referred to as the "first direction", another may be referred to as the "second direction", and the last one may be referred to as the "third direction".

[0057] In the following description, the configuration of the lens driving device according to this embodiment will be described with reference to the accompanying drawings.

[0058] Figure 1 This is a perspective view of the lens driving device according to this embodiment. Figure 2 It is along Figure 1 The cross-sectional view taken by line AA. Figure 3 It is along Figure 1 The cross-sectional view of line BB. Figure 4a (a) is a cross-sectional view illustrating the arrangement of the balls and related components with the retainer having moved to its lowest point along the optical axis. Figure 4a (b) is a cross-sectional view illustrating the arrangement of the balls and related components in the state where the retainer has moved to the uppermost end along the optical axis. Figure 4b This is a cross-sectional view illustrating the arrangement structure of the balls and tracks of the lens drive device according to this embodiment. Figure 5 This is a cross-sectional view illustrating the arrangement structure of the balls and related components of the lens driving device according to this embodiment. Figure 6 This is an exploded perspective view of the lens driving device according to this embodiment. Figure 7 From and Figure 6 An exploded stereoscopic view of the lens drive device viewed from different directions. Figure 8 This is a perspective view of the lens driving device according to this embodiment, in which the cover is omitted. Figure 9 This is a perspective view illustrating the fixed part and related components of the lens driving device according to this embodiment. Figure 10 This is a perspective view illustrating the moving part and related components of the lens driving device according to this embodiment.

[0059] The lens driving device 10 may include a fixed portion 100. The fixed portion 100 may be a fixed member. The fixed portion 100 may be a portion that is relatively fixed when the moving portion 200 moves. The fixed portion 100 may be a portion that is fixed during autofocus driving. The fixed portion 100 may correspond to the image sensor 60 side, and the moving portion 200 may correspond to the lens side.

[0060] The lens driving device 10 may include a base 110. The fixing portion 100 may include the base 110. The base 110 may be a housing. The base 110 may house the retainer 210. The base 110 may be located outside the retainer 210. The base 110 may be located below the retainer 210. The base 110 may be connected to the cover 120. The base 110 may be located within the cover 120. The base 110 may be located below the cover 120.

[0061] The base 110 may include a stepped portion. The stepped portion may be formed at the lower end portion of the outer surface of the base 110. The stepped portion may be formed by a protrusion at the lower end portion of the outer surface of the base 110. The side plate 122 of the cover 120 may be disposed on the stepped portion.

[0062] The base 110 may include a track 111. The track 111 may be a ball bearing track. Balls 400 may be disposed on the track 111. The track 111 may be disposed along the optical axis. The track 111 may extend along the optical axis. The balls 400 may contact the track 111. The balls 400 may move along the track 111. The track 111 may be formed in a groove shape. The track 111 may be a groove.

[0063] Track 111 may include multiple tracks. Track 111 may include a first track 111-1 and a second track 111-2. Track 111 may include a first track 111-1 corresponding to the first track 211-1 of retainer 210 and a second track 111-2 corresponding to the second track 211-2 of retainer 210. A first ball 410 and a second ball 420 may be provided on the first track 111-1. A third ball 430 and a fourth ball 440 may be provided on the second track 111-2.

[0064] The first track 111-1 can be a two-point contact track. The first track 111-1 can contact the ball 400 at two points. The ball 400 can contact the two inclined surfaces of the first track 111-1.

[0065] The second track 111-2 can be a single-point contact track. The second track 111-2 can contact the ball 400 at a single point. The ball 400 can contact the bottom surface of the second track 111-2. The distance between the two inclined surfaces of the second track 111-2 can be longer than the distance between the two inclined surfaces of the first track 111-1.

[0066] Considering assembly tolerances, at least one of the two tracks 211-1 and 211-2 on the retainer 210 side and the two tracks 111-1 and 111-2 on the base 110 side can be formed as a point-contact groove. In this embodiment, as... Figure 9 As shown, the second track 111-2 of the base 110 is a one-point contact groove, but in a modified embodiment, either of the two tracks 211-1 and 211-2 of the retainer 210 can be a one-point contact track.

[0067] The base 110 may include a first protrusion 112. The first protrusion 112 may be formed to protrude from the track 111. The first protrusion 112 may be a guide portion. The inner surface of the first protrusion 112 may be formed as a curved surface. The first protrusion 112 may be formed in a shape different from that of the second protrusion 212. The first protrusion 112 may support the second ball 420 from below. The first protrusion 112 may support the fourth ball 440 from below. The first protrusion 112 may be formed in a shape that will not interfere with the track 211 of the retainer 210.

[0068] The first protrusion 112 may be formed to protrude from the first track 111-1. The first protrusion 112 may be disposed between the first ball 410 and the second ball 420. The first protrusion 112 may be disposed between the first ball 410 and the second ball 420 along the optical axis. The first protrusion 112 may be disposed between the second ball 420 and the second protrusion 212 of the retainer 210. The first protrusion 112 may be disposed between the second ball 420 and the second protrusion 212 of the retainer 210 along the optical axis.

[0069] The first protrusion 112 may be formed to protrude from the second track 111-2. The first protrusion 112 may be disposed between the third ball 430 and the fourth ball 440. The first protrusion 112 may be disposed between the third ball 430 and the fourth ball 440 along the optical axis. The first protrusion 112 may be disposed between the fourth ball 440 and the second protrusion 212 of the retainer 210. The first protrusion 112 may be disposed between the fourth ball 440 and the second protrusion 212 of the retainer 210 along the optical axis.

[0070] The length of the first protrusion 112 of the base 110 in the optical axis direction can be greater than the diameter of the first ball 410. The length of the first protrusion 112 of the base 110 in the optical axis direction (see...) Figure 3 L1 in the middle can be larger than the diameter of the second ball 420 (see...). Figure 3 (D1 in the original text). According to a modified embodiment, the length of the first protrusion 112 of the base 110 in the optical axis direction can be equal to the diameter of the first ball 410. According to another modified embodiment, the length of the first protrusion 112 of the base 110 in the optical axis direction can be less than the diameter of the first ball 410.

[0071] The base 110 may include a third protrusion 113. The third protrusion 113 may support the lower end of the ball 400.

[0072] The third protrusion 113 may be formed at the lower end of the first track 111-1. The third protrusion 113 may support the first ball 410. The third protrusion 113 may support the first ball 410 from below. The first ball 410 may be disposed between the third protrusion 113 of the base 110 and the second protrusion 212 of the retainer 210 along the optical axis.

[0073] The third protrusion 113 may be formed at the lower end of the second track 111-2. The third protrusion 113 may support the third ball 430. The third protrusion 113 may support the third ball 430 from below. The third ball 430 may be disposed between the third protrusion 113 of the base 110 and the second protrusion 212 of the retainer 210 along the optical axis direction.

[0074] The base 110 may include a groove 117. The groove 117 may be formed by recessing the upper surface of the base 110. The groove 117 may be formed on the sidewall of the base 110. A stop 217 of the retainer 210 may be disposed in the groove 117. The groove 117 may be formed such that when the retainer 210 moves downward or rotates, the stop 217 of the retainer 210 is captured by the groove 117.

[0075] The lens driving device 10 may include a cover 120. The fixing portion 100 may include the cover 120. The cover 120 may be a covering member. The cover 120 may be a covering can. The cover 120 may be disposed on the base 110. The cover 120 may be disposed above the base 110. The cover 120 may be fixed to the base 110. The cover 120 may be coupled to the base 110. The cover 120 may be adhered to the base 110 using an adhesive. The cover 120 may accommodate at least a portion of the base 110. The cover 120 may be a shielding can. The cover 120 may be formed of metal.

[0076] The cover 120 may include an upper plate 121. The upper plate 121 may include an aperture for light to pass through. The upper plate 121 may include an aperture formed at a position corresponding to a lens. The cover 120 may include a side plate 122. The side plate 122 may extend from the upper plate 121. The side plate 122 may extend downward from the outer edge of the upper plate 121. The side plate 122 may be formed in a shape that bends from the upper plate 121.

[0077] The side panel 122 of the cover 120 may include a plurality of side panels. The side panel 122 may include a first side panel and a second side panel disposed opposite to each other, as well as a third side panel and a fourth side panel disposed opposite to each other.

[0078] The lens driving device 10 may include a substrate 130. The fixing portion 100 may include the substrate 130. The substrate 130 may be disposed on the base 110. The substrate 130 may be disposed on the base 110. The substrate 130 may be fixed to the base 110. The substrate 130 may be coupled to the base 110. The substrate 130 may be adhered to the base 110. The substrate 130 may be disposed on the side plate 122 of the cover member 120. The substrate 130 may be disposed on the side plate 122 of the cover member 120. The substrate 130 may be fixed to the side plate 122 of the cover member 120. The substrate 130 may be coupled to the side plate 122 of the cover member 120. The substrate 130 may be adhered to the side plate 122 of the cover member 120. The substrate 130 may be a flexible printed circuit board (FPCB). The substrate 130 may power the coil 320. The substrate 130 may power the sensor 330. The substrate 130 may be arranged parallel to the optical axis.

[0079] The substrate 130 may include terminals 131. Terminals may be disposed on the outer surface of the substrate 130. Terminals 131 may be formed at the lower end of the substrate 130. Terminals 131 may include multiple terminals. Terminals 131 may be connected to terminals of the printed circuit board 50. Terminals 131 may include terminals electrically connected to the sensor 330. Terminals 131 may include terminals electrically connected to the coil 320. Terminals 131 may include four terminals. The substrate 130 may include a bent portion. The substrate 130 may include a body portion on which the coil 320 and the sensor 330 are disposed, and a bent portion extending from and bent from the body portion. Terminals 131 may be disposed at the lower end of the outer surface of the bent portion.

[0080] The lens drive device 10 may include a ball pressing member. The ball pressing member can press the ball 400 so that the contact state of the ball is maintained. The ball pressing member may include a magnet 310 and a yoke 140 that act attractively therebetween.

[0081] The lens driving device 10 may include a magnetic yoke 140. The ball bearing pressing member may include a magnetic yoke 140. The fixing portion 100 may include a magnetic yoke 140. The magnetic yoke 140 may be disposed on the base 110. The magnetic yoke 140 may be disposed on the base 110. The magnetic yoke 140 may be fixed to the base 110. The magnetic yoke 140 may be connected to the base 110. The magnetic yoke 140 may be disposed on the substrate 130. The magnetic yoke 140 may be disposed on the substrate 130. The magnetic yoke 140 may be fixed to the substrate 130. The magnetic yoke 140 may be connected to the substrate 130. The magnetic yoke 140 may be disposed on the side plate 122 of the cover 120. The magnetic yoke 140 may be disposed on the side plate 122 of the cover 120. The magnetic yoke 140 may be fixed to the side plate 122 of the cover 120. The magnetic yoke 140 may be connected to the side plate 122 of the cover 120.

[0082] An attractive force can act between the yoke 140 and the magnet 310. A force can act on the magnet 310 to move it toward the yoke 140. Due to the attractive force between the magnet 310 and the yoke 140, the retainer 210 can press the ball 400 toward the base 110.

[0083] The lens driving device 10 may include a moving portion 200. The moving portion 200 may be a moving member. The moving portion 200 may be a portion that moves relative to the fixed portion 100. The moving portion 200 may be moved by the driving unit 300. The moving portion 200 may be configured to move relative to the fixed portion 100. The moving portion 200 may move relative to the fixed portion 100 during autofocus driving.

[0084] The lens driving device 10 may include a retainer 210. The moving part 200 may include the retainer 210. The retainer 210 may be a lens retainer. The retainer 210 may be a carrier. The retainer 210 may be disposed on the base 110. The retainer 210 may be disposed on the base 110. The retainer 210 may be disposed within the base 110. The retainer 210 may be movably disposed on the base 110. The retainer 210 may be movable relative to the base 110. The retainer 210 may be movable along the optical axis. The retainer 210 may be coupled to a lens. The retainer 210 may move integrally with the lens.

[0085] The retainer 210 may include a first side surface. A magnet 310 may be disposed on the first side surface. A ball 400 may be disposed on the first side surface.

[0086] The retainer 210 may include a groove. The groove may be a magnet receiving groove. The groove may be formed by recessing a first side surface of the retainer 210. A magnet 310 may be disposed in the groove. At least a portion of the magnet 310 may be accommodated in the groove.

[0087] The retainer 210 may include a track 211. The track 211 may be a ball track. The track 211 may be formed by recessing a first side surface of the retainer 210. The track 211 may be arranged along an optical axis. The track 211 may extend along an optical axis. A ball 400 may be disposed on the track 211. At least a portion of the ball 400 may be accommodated in the track 211. The ball 400 may move along the track 211. The track 211 may be formed in a groove shape. The track 211 may be a groove.

[0088] Track 211 may include multiple tracks. Track 211 may include a first track 211-1 and a second track 211-2. Track 211 may include a first track 211-1 disposed on one side of magnet 310 and a second track 211-2 disposed on the other side of magnet 310. First ball 410 and second ball 420 may be disposed on the first track 211-1. Third ball 430 and fourth ball 440 may be disposed on the second track 211-2.

[0089] The retainer 210 may include a second protrusion 212. The second protrusion 212 may be formed to protrude from the track 211 of the retainer 210. The second protrusion 212 may be a guide portion. The second protrusion 212 may be shaped to not interfere with the track 111 of the base 110. The second protrusion 212 may include a triangular cross-sectional shape. The second protrusion 212 may support a first ball 410 from above. The second protrusion 212 may support a third ball 430 from above.

[0090] The second protrusion 212 can be formed to protrude from the first track 211-1 of the retainer 210. The second protrusion 212 can be disposed between the first ball 410 and the first protrusion 112 of the base 110. The second protrusion 212 can be disposed between the first ball 410 and the first protrusion 112 of the base 110 along the optical axis. The second protrusion 212 can be disposed between the first ball 410 and the second ball 420. The second protrusion 212 can be disposed between the first ball 410 and the second ball 420 along the optical axis.

[0091] The second protrusion 212 can be formed to protrude from the second track 211-2 of the retainer 210. The second protrusion 212 can be disposed between the third ball 430 and the first protrusion 112 of the base 110. The second protrusion 212 can be disposed between the third ball 430 and the first protrusion 112 of the base 110 along the optical axis. The second protrusion 212 can be disposed between the third ball 430 and the fourth ball 440. The second protrusion 212 can be disposed between the third ball 430 and the fourth ball 440 along the optical axis.

[0092] The second protrusion 212 of the retainer 210 may overlap with the first protrusion 112 of the base 110 in the optical axis direction. In the optical axis direction, the first ball 410, the second protrusion 212 of the retainer 210, the first protrusion 112 of the base 110, and the second ball 420 may overlap in this order. The first protrusion 112 of the base 110 may be provided on an imaginary line connecting the first ball 410 and the second ball 420. The second protrusion 212 of the retainer 210 may be provided on an imaginary line connecting the first ball 410 and the second ball 420.

[0093] When the retainer 210 moves to its maximum extent in the upward direction along the optical axis, the first protrusion 112 of the base 110 and the second protrusion 212 of the retainer 210 can be spaced apart from each other. For example... Figure 4a As shown in (b), when the retainer 210 is in contact with the upper plate 121 of the cover 120, a gap may be formed between the first protrusion 112 of the base 110 and the second protrusion 212 of the retainer 210.

[0094] The second protrusion 212, which serves as the guide shape of the moving part 200, and the first protrusion 112, which serves as the guide shape of the fixed part 100, can be designed with allowances so that they will not contact each other under any circumstances. However, if the length of the guide shape of the moving part 200 and the fixed part 100 in the optical axis direction becomes too small, the injection molding properties may deteriorate, and there is a possibility that the guide shape may be damaged due to contact with the ball 400.

[0095] The length of the second protrusion 212 of the retainer 210 in the optical axis direction (see...) Figure 3 L2 in the figure can be larger than the diameter of the first ball 410 (see [reference]). Figure 3 (D2 in the original text). The length of the second protrusion 212 of the retainer 210 in the optical axis direction can be greater than the diameter of the second ball 420. According to a modified embodiment, the length of the second protrusion 212 of the retainer 210 in the optical axis direction can be equal to the diameter of the first ball 410. The length of the second protrusion 212 of the retainer 210 in the optical axis direction can be less than the diameter of the first ball 410.

[0096] The retainer 210 may include a fourth protrusion 213. The fourth protrusion 213 may support the upper end of the ball 400. The fourth protrusion 213 may prevent the ball 400 from dislodging upwards.

[0097] A fourth protrusion 213 may be formed at the upper end of the first track 211-1. The fourth protrusion 213 may cover the second ball 420. The fourth protrusion 213 may be disposed above the second ball 420. The fourth protrusion 213 may prevent the second ball 420 from dislodging upwards. The second ball 420 may be disposed along the optical axis between the first protrusion 112 of the base 110 and the fourth protrusion 213 of the retainer 210.

[0098] A fourth protrusion 213 may be formed at the upper end of the second track 211-2. The fourth protrusion 213 may cover the fourth ball 440. The fourth protrusion 213 may be positioned above the fourth ball 440. The fourth protrusion 213 may prevent the fourth ball 440 from dislodging upwards. The fourth ball 440 may be positioned along the optical axis between the first protrusion 112 of the base 110 and the fourth protrusion 213 of the retainer 210.

[0099] The retainer 210 may include an upper stop 216. The upper stop 216 may be formed on the upper surface of the retainer 210. The upper stop 216 may form the upper end of the retainer 210. When the retainer 210 moves upward, the upper stop 216 may contact the upper plate 121 of the cover 120. That is, the upward movement of the retainer 210 may be limited by the upper stop 216. The upper stop 216 may include a protrusion.

[0100] The retainer 210 may include a stop portion 217. The stop portion 217 may be formed as a protrusion or a raised portion. The stop portion 217 may be formed to protrude from the outer surface of the retainer 210. The stop portion 217 may be disposed in a groove 117 of the base 110. The stop portion 217 may be formed with a shape corresponding to the groove 117 of the base 110.

[0101] When the retainer 210 moves upward, the stop 217 can contact the upper plate 121 of the cover 120. When the retainer 210 moves downward, the stop 217 can contact the base 110. When the retainer 210 rotates, the stop 217 can contact the base 110. That is, the stop 217 can perform the functions of any one or more of the upper stop, lower stop, and rotation stop.

[0102] The lens driving device 10 may include a driving unit 300. The driving unit 300 can move the movable portion 200 relative to the fixed portion 100. When power is applied, the driving unit 300 can move the movable portion 200. The driving unit 300 may include a magnet 310 and a coil 320. The driving unit 300 can move the movable portion 200 through electromagnetic interaction. The magnet 310 and the coil 320 can move the retainer 210 relative to the base 110. The magnet 310 and the coil 320 can move the retainer 210 along the optical axis. The driving unit 300 can move the retainer 210 relative to the base 110 along the optical axis.

[0103] The lens driving device 10 may include a magnet 310. The driving unit 300 may include a magnet 310. The magnet 310 may be disposed on the holder 210. The magnet 310 may be disposed on the holder 210. The magnet 310 may be fixed to the holder 210. The magnet 310 may be coupled to the holder 210. The magnet 310 may be adhered to the holder 210 using an adhesive.

[0104] Magnet 310 can be positioned corresponding to coil 320. Magnet 310 can overlap with coil 320 in a direction perpendicular to the optical axis. Magnet 310 can overlap with coil 320 in the x-axis direction. Alternatively, magnet 310 can overlap with coil 320 in the y-axis direction. Magnet 310 can be positioned facing coil 320. Magnet 310 can be opposite coil 320. Magnet 310 can interact with coil 320. Magnet 310 can interact electromagnetically with coil 320. When current is applied to coil 320, magnet 310 can move. Magnet 310 can move integrally with holder 210.

[0105] Magnet 310 may be a quadrupole magnetized magnet. Magnet 310 may include a first magnet portion having N poles and S poles, a second magnet portion disposed on the first magnet portion and having S poles and N poles, and a neutral portion disposed between the first magnet portion and the second magnet portion. Magnet 310 may be disposed along the optical axis.

[0106] According to the modified embodiment, magnet 310 can be a two-pole magnetized magnet. For example, the upper region of magnet 310 can be an N pole and the lower region can be an S pole.

[0107] The magnet 310 can be configured to exert an attractive force between the magnet 310 and the yoke 140. Through the force of the magnet 310 tending to move towards the yoke 140, the ball 400 can be pressed between the retainer 210 and the base 110. Thus, a state of close contact between the ball 400 and the retainer 210 and the base 110 can be maintained.

[0108] The lens driving device 10 may include a coil 320. The driving unit 300 may include a coil 320. The coil 320 may be disposed on the substrate 130. The coil 320 may be disposed on the substrate 130. The coil 320 may be fixed to the substrate 130. The coil 320 may be connected to the substrate 130. The coil 320 may be soldered to the substrate 130. The coil 320 may be disposed on the base 110. The coil 320 may be disposed above the base 110. The coil 320 may be fixed to the base 110. The coil 320 may be disposed on the side plate 122 of the cover member 120. The coil 320 may be disposed on the side plate 122 of the cover member 120.

[0109] Coil 320 can interact with magnet 310. Coil 320 can be positioned facing magnet 310. Coil 320 can be opposite magnet 310. Coil 320 can be positioned at a location corresponding to magnet 310. Coil 320 can overlap with magnet 310 in a direction perpendicular to the optical axis. Coil 320 can overlap with magnet 310 in the x-axis direction. Alternatively, coil 320 can overlap with magnet 310 in the y-axis direction. Coil 320 can move magnet 310. Coil 320 can move holder 210. Coil 320 can move lens.

[0110] When a current is applied to the coil 320, the magnet 310 can move. When a forward current is applied to the coil 320, the magnet 310 can move upward. When a reverse current is applied to the coil 320, the magnet 310 can move downward. However, conversely, when a reverse current is applied to the coil 320, the magnet 310 can move upward, and when a forward current is applied to the coil 320, the magnet 310 can move downward.

[0111] The lens driving device 10 may include a sensor 330. The driving unit 300 may include a sensor 330. The sensor 330 may be disposed on the substrate 130. The sensor 330 may be disposed on the substrate 130. The sensor 330 may be connected to the substrate 130. The sensor 330 may be soldered to the substrate 130. The sensor 330 may be mounted on the substrate 130.

[0112] Sensor 330 can detect magnet 310. Sensor 330 can detect the magnetic force of magnet 310. Sensor 330 can be a Hall sensor. Sensor 330 can detect the position or movement of magnet 310. Therefore, sensor 330 can detect the position or movement of retainer 210. Sensor 330 can detect retainer 210. The position of magnet 310 detected by sensor 330 can be used for autofocus feedback control.

[0113] The lens driving device 10 may include a guiding section. The guiding section can guide the movement of the moving part 200 relative to the fixed part 100. The guiding section can guide the movement of the moving part 200 along the optical axis.

[0114] The lens driving device 10 may include a ball 400. The guiding portion may include a ball 400. The ball 400 may be formed of ceramic. The ball 400 may be a ceramic ball. The ball 400 may be formed in a spherical shape. The ball 400 may include a curved surface.

[0115] The ball bearing 400 can be disposed on the base 110. The ball bearing 400 can be disposed on the base 110. The ball bearing 400 can contact the base 110. The ball bearing 400 can be disposed on the track 111 of the base 110. The ball bearing 400 can be disposed on the track 111 of the base 110. The ball bearing 400 can contact the track 111 of the base 110.

[0116] The ball 400 can be disposed on the retainer 210. The ball 400 can be disposed above the retainer 210. The ball 400 can contact the retainer 210. The ball 400 can be disposed on the track 211 of the retainer 210. The ball 400 can be disposed on the track 211 of the retainer 210. The ball 400 can contact the track 211 of the retainer 210.

[0117] The ball bearing 400 can be disposed between the base 110 and the retainer 210. The ball bearing 400 can be disposed between the track 111 of the base 110 and the track 211 of the retainer 210. The ball bearing 400 can be disposed between the base 110 and the retainer 210 along a first direction perpendicular to the optical axis. The ball bearing 400 can be disposed between the retainer 210 and the base 110 along the direction from which the magnet 310 faces the yoke 140.

[0118] The ball 400 can roll along the optical axis. When the retainer 210 moves, the ball 400 can move together with the retainer 210. The ball 400 can restrict the movement of the retainer 210 to the optical axis. The movement of the retainer 210 in directions other than the optical axis can be restricted by the ball 400. The ball 400 can guide the movement of the retainer 210 along the optical axis.

[0119] When the retainer 210 is moved by the drive unit 300, the ball 400 can roll along the track 111 of the base 110. In this embodiment, the ball 400 can move without rotating in place when the retainer 210 moves. Both rotational friction generated during rotation and rolling friction generated during rolling can act on the ball 400; however, in this embodiment, rolling friction can be used instead of rotational friction. Rolling friction can be less than rotational friction. Therefore, in this embodiment, the power consumed by the drive can be reduced.

[0120] This embodiment may include a structure in which, when the movable part 200 moves upward (see...), Figure 4a In (b) of (b), the space for the movement of the ball 400 is opened so that the ball 400 does not interfere with the moving part 200 or the fixed part 100. Therefore, in this embodiment, the ball 400 can roll along the tracks 111, 211 instead of rotating in place. When the moving part 200 moves upward, the rolling friction of the ball 400 can be utilized.

[0121] In addition, when the moving part 200 moves downward (see...) Figure 4a When (a) of a), the rolling friction of the ball 400 can also be utilized.

[0122] like Figure 4a As shown in (b), the minimum spacing between the two balls 410, 420 in the optical axis direction (see [reference]). Figure 4a D) can be maintained. Even when the retainer 210 moves, the distance between the first ball 410 and the second ball 420 can be maintained.

[0123] In this embodiment, compared to a comparative example where the second protrusion 212 of the moving portion 200 and the first protrusion 112 of the fixed portion 100 are absent, skewing of the ball 400 can be prevented. In the comparative example, when skewing of the ball 400 occurs, tilting may occur during the movement of the moving portion 200, which could lead to problems.

[0124] The ball bearing 400 may include multiple balls. The ball bearing 400 may include four balls. The ball bearing 400 may include first to fourth balls 410, 420, 430, and 440. The ball bearing 400 may include a first ball 410 and a second ball 420 disposed on a first track 111-1 of the base 110. The ball bearing 400 may include a first ball 410 and a second ball 420 disposed on a first track 211-1 of the retainer 210. The ball bearing 400 may include a third ball 430 and a fourth ball 440 disposed on a second track 111-2 of the base 110. The ball bearing 400 may include a third ball 430 and a fourth ball 440 disposed on a second track 211-2 of the retainer 210.

[0125] The first ball 410 and the second ball 420 can overlap in the optical axis direction. The second ball 420 can be disposed on the first ball 410. The third ball 430 and the fourth ball 440 can overlap in the optical axis direction. The fourth ball 440 can be disposed on the third ball 430. The first ball 410 and the third ball 430 can overlap in a direction perpendicular to the optical axis. The second ball 420 and the fourth ball 440 can overlap in a direction perpendicular to the optical axis.

[0126] The diameters of the first ball bearing 410 and the second ball bearing 420 can be the same. The diameters of the first ball bearing 410 and the third ball bearing 430 can be the same. The diameters of the third ball bearing 430 and the fourth ball bearing 440 can be the same. The diameters of the second ball bearing 420 and the fourth ball bearing 440 can be the same. The diameters of the first ball bearing 410 and the fourth ball bearing 440 can be the same.

[0127] In this embodiment, the device can be designed so that even when the moving part 200 is moved to its lowest position, the moving part 200 and the ball 400 will not come into contact. This eliminates the risk of the ball 400 locking. Figure 4a As shown in (a), even when the moving part 200 is moved to its lowest position, a gap may still exist between the moving part 200 and the ball 400. Gaps may also exist between the moving part 200 and the first ball 410, and between the moving part 200 and the second ball 420.

[0128] In this embodiment, the device can be designed so that the ball 400 will not fall downwards even when the moving part 200 is moved to its lowest position. For example... Figure 4aAs shown in (b), the gap between the third protrusion 113 of the base 110 and the retainer 210 may be smaller than the radius of the ball 400. The gap between the third protrusion 113 of the base 110 and the retainer 210 may be smaller than the diameter of the ball 400.

[0129] In this embodiment, the device can be designed so that the ball 400 will not fall upwards even when the moving part 200 is moved to its uppermost position. For example... Figure 4a As shown in (b), the gap between the base 110 and the fourth protrusion 213 of the retainer 210 can be smaller than the radius of the ball 400. The gap between the base 110 and the fourth protrusion 213 of the retainer 210 can be smaller than the diameter of the ball 400.

[0130] When the moving part 200 moves, the ball 400 can move by a certain amount, which is half the amount of movement of the moving part 200. Therefore, the lengths of the tracks 111 and 211 (see...) Figure 4a L in (b) can pass through at least the diameter of the ball bearing 400 (see Figure 4a The sum of "d) in (b)" and "half the stroke length of the moving part 200" is used to ensure this. That is, the length of the tracks 111 and 211 can be greater than the sum of the diameter of the ball 400 and half the stroke length of the moving part.

[0131] The length of the first protrusion 112 of the base 110 in the direction perpendicular to the optical axis (see...) Figure 4b L1 in the figure can be larger than the radius of each ball 410, 420. The length of the first protrusion 112 of the base 110 in the direction perpendicular to the optical axis (see Figure 4b L1 in the figure can be larger than the radius of the first ball 410 (see [reference]). Figure 4b (r1 in the text). The length of the first protrusion 112 of the base 110 in the direction perpendicular to the optical axis (see r1 in the text). Figure 4b L1 in the middle can be larger than the radius of the second ball 420 (see...). Figure 4b (r2 in the middle).

[0132] If the protruding length of the first protrusion 112 is less than the radius of the second ball 420, the second ball 420 may get caught between the first protrusion 112 and the retainer 210, causing a problem.

[0133] The length of the second protrusion 212 of the retainer 210 in the direction perpendicular to the optical axis (see...) Figure 4b L2 in the figure can be greater than the radius of each ball 410, 420. The length of the second protrusion 212 of the retainer 210 in the direction perpendicular to the optical axis (see Figure 4b L2 in the figure can be larger than the radius of the first ball 410 (see [reference]). Figure 4b (r1 in the text). The length of the second protrusion 212 of the retainer 210 in the direction perpendicular to the optical axis (see r1 in the text). Figure 4b L2 in the middle can be larger than the radius of the second ball 420 (see...). Figure 4b (r2 in the middle).

[0134] If the protruding length of the second protrusion 212 is less than the radius of the first ball 410, the first ball 420 may be trapped between the second protrusion 212 and the base 110, causing a problem.

[0135] The track 111 of the base 110 may include an upper track disposed above the first protrusion 112 and a lower track disposed below the first protrusion 112. A second ball 420 may be disposed on the upper track of the base 110, and a first ball 410 may be disposed on the lower track of the base 110. The length of the upper track of the base 110 in the optical axis direction (see...) Figure 4b (a1) may be different from the length of the lower track of base 110 in the optical axis direction (see [reference]). Figure 4b (a2 in the text). The length of the upper track of the base 110 in the optical axis direction (see a2 in the text). Figure 4b (a1) can be shorter than the length of the lower track of base 110 in the optical axis direction (see Figure 4b (a2 in the original text). According to the modified embodiment, the length of the upper track of the base 110 in the optical axis direction may be longer than the length of the lower track of the base 110 in the optical axis direction.

[0136] The track 211 of the retainer 210 may include an upper track disposed above the second protrusion 212 and a lower track disposed below the second protrusion 212. A second ball 420 may be disposed on the upper track of the retainer 210, and a first ball 410 may be disposed on the lower track of the retainer 210. The length of the upper track of the retainer 210 in the optical axis direction (see...) Figure 4b b1 in the figure may be different from the length of the lower track of retainer 210 in the optical axis direction (see [reference]). Figure 4b (b2 in the text). The length of the upper track of the retainer 210 in the optical axis direction (see...). Figure 4b b1) can be longer than the length of the lower track of the retainer 210 in the optical axis direction (see [reference]). Figure 4b (b2 in the original text). According to the modified embodiment, the length of the upper track of the retainer 210 in the optical axis direction may be shorter than the length of the lower track of the retainer 210 in the optical axis direction.

[0137] According to the modified embodiment, the fourth protrusion 213 can be formed as a separate component relative to the retainer 210. The fourth protrusion 213 can be formed as a separate component and connected to the upper portion of the retainer 210. The first protrusion 112 can be formed as a separate component relative to the base 120. The first protrusion 112 can be formed as a separate component and connected to the track 111 of the base 110. The second protrusion 212 can be formed as a separate component relative to the retainer 210. The second protrusion 212 can be formed as a separate component and connected to the track 211 of the retainer 210.

[0138] In the following description, the configuration of the lens driving device according to the modified embodiment will be described with reference to the accompanying drawings. The modified embodiment will be described below focusing on its differences from the present embodiment. Configurations of modified embodiments not described below can be inferred from and applied to the description in the present embodiment.

[0139] Figure 11 This is a perspective view illustrating the fixed part and related components of a lens driving device according to a modified embodiment. Figure 12 This is a perspective view illustrating the moving part and related components of a lens driving device according to a modified embodiment. Figure 13 This is a cross-sectional view illustrating the arrangement structure of the balls and related components of a lens drive device according to a modified embodiment.

[0140] In the modified embodiment, the shape of the protrusions formed on the second tracks 111-2, 211-2 can be modified.

[0141] The base 110 may include a fifth protrusion 114 disposed between the third ball 430 and the fourth ball 440 along the optical axis. In the optical axis direction, the length of the fifth protrusion 114 of the base 110 may be shorter than the length of the first protrusion 112 of the base 110.

[0142] The base 110 may include a seventh protrusion 115. The seventh protrusion 115 may support the lower end of the third ball 430. The bottom surface of the seventh protrusion 115 may be configured to be higher than the bottom surface of the third protrusion 113.

[0143] The retainer 210 may include a sixth protrusion 214 disposed between the third ball 430 and the fourth ball 440 along the optical axis. In the optical axis direction, the length of the sixth protrusion 214 of the retainer 210 may be shorter than the length of the second protrusion 212 of the retainer 210.

[0144] The retainer 210 may include an eighth protrusion 215. The eighth protrusion 215 may cover the fourth ball 440 from above. The top surface of the eighth protrusion 215 may be configured to be lower than the top surface of the fourth protrusion 213.

[0145] In the modified embodiment, the first to fourth balls 410, 420, 430, and 440 can be arranged asymmetrically. The third ball 430 can be positioned higher than the first ball 410. The fourth ball 440 can be positioned lower than the second ball 420. Therefore, the distance between the third ball 430 and the fourth ball 440 can be shorter than the distance between the first ball 410 and the second ball 420. In the direction perpendicular to the optical axis, the first ball 410 may not overlap with the third ball 430. In the direction perpendicular to the optical axis, the second ball 420 may not overlap with the fourth ball 440. The second ball 420 can be positioned higher than the first ball 410, and the fourth ball 440 can be positioned higher than the third ball 430. The first ball 410 and the second ball 420 can overlap in the optical axis direction, and the third ball 430 and the fourth ball 440 can overlap in the optical axis direction.

[0146] In the following description, the autofocus drive of the lens drive device according to this embodiment will be described with reference to the accompanying drawings.

[0147] Figure 14 This is a diagram illustrating the autofocus drive of the lens drive device according to this embodiment.

[0148] When a current is applied to the coil 320, an electromagnetic field is formed around the coil 320, and the coil 320 and the magnet 310 can interact electromagnetically. At this time, since the coil 320 is fixed to the substrate 130 and the base 110, the magnet 310 can move. The magnet 310 can interact with the holder 210 and the lens (see...). Figure 14 A) moves together. At this time, due to the movement of the ball bearing 400 guide retainer 210 relative to the base 110 in the optical axis direction, the retainer 210 and the lens can move along the optical axis direction (see A). Figure 14 OA in the middle) move (see Figure 14 (B in the image sensor 60). Thus, the lens can move relative to the image sensor 60 along the optical axis.

[0149] More specifically, when a positive current is applied to the coil 320, the magnet 310 can move upward along the optical axis due to the interaction between the coil 320 and the magnet 310. This allows the lens to move away from the image sensor 60. In the initial position where no current is applied to the coil 320, an upper travel space can be formed between the upper stop 216 of the holder 210 and the upper plate 121 of the cover 120. When a positive current is applied to the coil 320, the holder 210 can move within this upper travel space.

[0150] Furthermore, when a reverse current is applied to the coil 320, the magnet 310 can move downwards along the optical axis due to the interaction between the coil 320 and the magnet 310. This allows the lens to move closer to the image sensor 60. In the initial position where no current is applied to the coil 320, a lower travel space can be formed between the lower stop of the holder 210 and the base 110. When a reverse current is applied to the coil 320, the holder 210 can move within this lower travel space.

[0151] In this way, by applying a forward or reverse current to the coil 320, the image of the object formed on the image sensor 60 can be clearly adjusted. That is, autofocus drive can be performed.

[0152] Furthermore, sensor 330 can detect the magnetic field of magnet 310 in real time to detect the positions of magnet 310, retainer 210, and lens. Based on the lens position detected by sensor 330, feedback control can be executed to move the lens to a more precise position. In this embodiment, more precise autofocus drive can be executed through autofocus feedback control.

[0153] In the following description, the configuration of the camera device according to this embodiment will be described with reference to the accompanying drawings.

[0154] Figure 15 This is an exploded perspective view of the camera device according to this embodiment.

[0155] Camera device 10A may include lens drive device 10. Lens drive device 10 may be a voice coil motor (VCM). Lens drive device 10 may be a lens drive motor. Lens drive device 10 may be a lens drive actuator. Lens drive device 10 may include an AF module. According to a modified embodiment, lens drive device 10 may include an OIS module. Lens drive device 10 may be a means of driving a lens. As shown, lens drive device 10 may include a lens. However, the lens can be understood as a component of camera device 10A separate from lens drive device 10.

[0156] The camera device 10A may include a lens module 20. The lens module 20 may be mounted on the image sensor 60. The lens module 20 may be coupled to the lens drive device 10. The lens module 20 may be coupled to the holder 210 of the lens drive device 10. The lens module 20 may be movable integrally with the holder 210. The lens module 20 may be configured to be movable relative to the image sensor 60. The lens module 20 may be movable relative to the image sensor 60 along the optical axis.

[0157] Lens module 20 may include lenses. Lenses may include multiple lenses. Lens module 20 may include a lens barrel. Multiple lenses may be disposed within the lens barrel. Multiple lenses may be coupled to the inner peripheral surface of the lens barrel. Multiple lenses may be stacked and disposed within the lens barrel.

[0158] Camera device 10A may include a filter 30. The filter 30 can be used to block light of a specific frequency band passing through lens module 20 from incident on image sensor 60. The filter 30 may be arranged parallel to the xy plane. The filter 30 may be disposed between lens module 20 and image sensor 60. The filter 30 may be disposed on sensor base 40. According to a modified embodiment, the filter 30 may be disposed on base 110 of lens driving device 10. The filter 30 may include an infrared filter. The infrared filter can block light in the infrared region from incident on image sensor 60.

[0159] The camera device 10A may include a sensor base 40. The sensor base 40 may be disposed between the lens drive device 10 and the printed circuit board 50. The sensor base 40 may include a protrusion 41 on its inner side having a filter 30. An opening may be formed in the portion of the sensor base 40 where the filter 30 is disposed, allowing light passing through the filter 30 to enter the image sensor 60. An adhesive member may connect or attach the base 110 of the lens drive device 10 to the sensor base 40. The adhesive member may also be used to prevent foreign objects from entering the interior of the lens drive device 10. The adhesive member may comprise one or more of epoxy resin, thermosetting adhesive, and UV-curable adhesive.

[0160] Camera device 10A may include a printed circuit board (PCB) 50. The PCB 50 may be a substrate or a circuit board. A lens driving device 10 may be disposed on the PCB 50. A sensor base 40 may be disposed between the PCB 50 and the lens driving device 10. The PCB 50 may be electrically connected to the lens driving device 10. An image sensor 60 may be disposed on the PCB 50. Various circuits, components, control units, etc., may be disposed on the PCB 50 to convert the image formed on the image sensor 60 into an electrical signal and transmit the electrical signal to an external device.

[0161] Camera device 10A may include an image sensor 60. The image sensor 60 may have a configuration for light to pass through a lens and filter 30 to form 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 connected to the printed circuit board 50 via surface mount technology (SMT). As another example, the image sensor 60 may be connected to the printed circuit board 50 via flip-chip technology. The image sensor 60 may be configured such that the optical axis of the lens and the optical axis of the image sensor 60 coincide. That is, the optical axis of the image sensor 60 and the optical axis of the lens may be aligned. The image sensor 60 can convert light incident on its effective imaging area into an electrical signal. The image sensor 60 may be any of a charge-coupled device (CCD), metal-oxide-semiconductor (MOS), CPD, and CID.

[0162] The camera device 10A may include a motion sensor 70. The motion sensor 70 may be mounted on a printed circuit board 50. The motion sensor 70 may be electrically connected to a control unit 80 via a circuit pattern provided on the printed circuit board 50. The motion sensor 70 may output rotational angular velocity information generated due to the movement of the camera device 10A. The motion sensor 70 may include a 2-axis gyroscope, a 3-axis gyroscope, or an angular velocity sensor.

[0163] The camera device 10A may include a control unit 80. The control unit 80 may be mounted on a printed circuit board 50. The control unit 80 may be electrically connected to the coil 320 of the lens drive device 10. The control unit 80 may independently control the direction, intensity, amplitude, etc., of the current supplied to the coil 320. The control unit 80 may control the lens drive device 10 to perform autofocus and / or image stabilization functions. Furthermore, the control unit 80 may perform autofocus feedback control and / or image stabilization feedback control on the lens drive device 10.

[0164] The camera device 10A may include a connector 90. The connector 90 may be electrically connected to a printed circuit board 50. The connector 90 may include a port for electrical connection to an external device.

[0165] In the following description, the configuration of the optical device according to this embodiment will be described with reference to the accompanying drawings.

[0166] Figure 16 This is a perspective view of the optical device according to this embodiment.

[0167] Optical device 1 may include one or more of a mobile phone, cellular phone, portable terminal, mobile terminal, smartphone, smart tablet, portable smart device, digital camera, laptop computer, digital broadcasting terminal, PDA (personal digital assistant), PMP (portable multimedia player), and navigation system. Optical device 1 may include any device for capturing images or photographs. Optical device 1 may include a robot. Optical device 1 may include a vehicle.

[0168] Optical device 1 may include a body 2. Optical device 1 may include a camera device 10A. Camera device 10A may be mounted on the body 2. Camera device 10A can capture images of a subject. Optical device 1 may include a display. The display may be mounted on the body 2. The display may output one or more of video and images captured by camera device 10A. The display may be mounted on a first surface of the body 2. Camera device 10A may be mounted on one or more of the first surface and a second surface opposite to the first surface of the body 2. Camera device 10A may have three cameras arranged vertically. Alternatively, camera device 10A may have three cameras arranged horizontally.

[0169] Although embodiments of the invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the invention can be practiced in other specific forms without altering its technical spirit or essential features. Therefore, it should be understood that the above embodiments are illustrative in all respects and not restrictive.

Claims

1. A camera device, comprising: Base; A retainer is disposed on the base; A driving unit, the driving unit being used to move the retainer relative to the base along the optical axis; as well as Ball bearings, wherein the ball bearings are disposed between the base and the retainer. The base includes a groove-shaped track extending along the optical axis. The ball bearings include a first ball bearing and a second ball bearing, which are disposed on the track of the base. The base includes a first protrusion projecting from the track of the base. Wherein, the first protrusion of the base is disposed between the first ball and the second ball along the optical axis direction, and The length of the first protrusion in the direction perpendicular to the optical axis is greater than the radius of the second ball.

2. The camera device according to claim 1, wherein, The retainer includes a groove-shaped track extending along the optical axis and a second protrusion projecting from the track of the retainer. The second protrusion of the retainer is disposed between the first ball and the first protrusion of the base along the optical axis.

3. The camera device according to claim 2, wherein, When the retainer moves to its maximum extent in the upward direction along the optical axis, the first protrusion of the base and the second protrusion of the retainer are spaced apart from each other.

4. The camera device according to claim 2, wherein, The base includes a third protrusion, and The first ball is disposed along the optical axis between the third protrusion of the base and the second protrusion of the retainer.

5. The camera device according to claim 1, wherein, The retainer includes a fourth protrusion, and The second ball is disposed along the optical axis between the first protrusion of the base and the fourth protrusion of the retainer.

6. The camera device according to claim 1, wherein, When the retainer is moved by the drive unit, the ball rolls along the track of the base.

7. The camera device according to claim 2, wherein, The second protrusion of the retainer overlaps with the first protrusion of the base in the optical axis direction.

8. The camera device according to claim 1, wherein, The length of the first protrusion of the base in the optical axis direction is greater than the diameter of the second ball.

9. The camera device according to claim 2, wherein, The length of the second protrusion of the retainer in the optical axis direction is greater than the diameter of the first ball.

10. The camera device according to claim 1, wherein, The diameter of the first ball and the diameter of the second ball are the same.

Images