Apparatus for Driving Lens

Abstract

The lens driving device can reduce the carrier height by opening the upper and lower ends of the magnet groove into which a magnet embedded in the lens focusing device of the camera module is inserted, and forming both ends of the magnet groove into curved surfaces to reduce the Z-axis space. The present invention has the effect of reducing the carrier height by opening the upper and lower ends of the magnet groove into which the magnet is inserted and forming both ends of the magnet groove into curved surfaces to reduce the Z-axis space. The present invention changes both ends of the magnet from a square shape to an elliptical shape and modifies the structure of the magnet groove to match the changed shape, thereby facilitating the manufacturing of the magnet and providing the effect of easy coupling by fitting the magnet into the magnet groove.

Description

Technology Field

[0001] The present invention relates to a lens driving device, and more specifically, to a lens driving device capable of reducing the carrier height by reducing the Z-axis space by opening the upper and lower ends of a magnet groove into which a magnet embedded in a lens focusing device of a camera module is inserted, and forming both ends of the magnet groove into curved surfaces. Background Technology

[0002] Generally, smartphones are equipped with a small camera module. They feature an autofocus function that automatically focuses on a subject when shooting, and Optical Image Stabilization (OIS) that reduces image blur by compensating for hand shake (vibration) that occurs during shooting.

[0003] The camera module comprises a lens drive unit including an actuator for autofocus and an actuator for OIS.

[0004] These lens driving devices apply a VCM (Voice Coil Motor) driving method that uses a magnetic field through a magnet and coil and the Lorentz force of the wire.

[0005] FIG. 1 is a diagram showing the configuration of an OIS carrier including a magnet according to an embodiment of the prior art, FIG. 2 is a diagram showing the side view of an OIS carrier equipped with a magnet according to an embodiment of the prior art, and FIG. 3 is a diagram showing an example of a magnet according to an embodiment of the prior art.

[0006] In a conventional OIS carrier (10) that implements a hand shake correction function, a magnet assembly guide (14) is required on the upper surface of a magnet groove (11) into which a magnet (12) is inserted, and thus occupies Z-axis space equal to the thickness of the guide, and consequently, there was a problem in that it was difficult to slim down the height of the drive unit.

[0007] In addition, the conventional magnet (12) forms an inclined surface (13) at the upper corner of the S pole to distinguish between the S pole and the N pole. For this reason, the magnet groove (11) must form an inclined surface on one side to correspond to the structure of the magnet (12), so there is a disadvantage that the manufacturing of the OIS carrier (10) is not easy. Prior art literature

[0008] Korean Registered Patent No. 10-2669072 The problem to be solved

[0009] To solve such problems, the present invention aims to provide a lens driving device capable of reducing the carrier height by reducing the Z-axis space through opening the upper and lower ends of a magnet groove into which a magnet embedded in a lens focusing device of a camera module is inserted, and forming both ends of the magnet groove into curved surfaces.

[0010] The purpose of the present invention is to provide a lens driving device that can improve the ease of manufacturing a magnet by changing both ends of a magnet embedded in a lens focusing device of a camera module from a square shape to an elliptical shape, and changing the structure of the magnet groove to match the changed shape. means of solving the problem

[0011] A lens driving device according to the features of the present invention for achieving the above objective is,

[0012] Housing; and

[0013] It includes a carrier formed inside the above housing, with a central opening for focusing the lens, and

[0014] A magnet groove is formed on one side of the above carrier to be coupled by inserting a magnet, and

[0015] Both ends of the above magnet are formed in a curved shape, and

[0016] The above magnet groove is open vertically, and the left and right ends are formed in an arc shape corresponding to both ends of the curved magnet.

[0017] It further includes an AF (Auto Focus) carrier formed inside the above housing and moving up and down in the direction of the optical axis where light is incident to perform auto-focusing of the lens,

[0018] The above carrier includes an OIS (Optical Image Stabilization) carrier that is seated inside the AF carrier, has a central opening to which a lens barrel equipped with a lens is coupled, and moves in the X-axis and Y-axis directions perpendicular to the optical axis direction to perform an image stabilization function. Effects of the invention

[0019] With the above-described configuration, the present invention has the effect of reducing the carrier height by opening the upper and lower ends of the magnet groove into which the magnet is inserted and forming both ends of the magnet groove into curved surfaces to reduce the Z-axis space.

[0020] The present invention changes both ends of the magnet from a square shape to an elliptical shape and modifies the structure of the magnet groove to match the changed shape, thereby facilitating the manufacturing of the magnet and providing the effect of easy coupling by fitting the magnet into the magnet groove. Brief explanation of the drawing

[0021] FIG. 1 is a diagram showing the configuration of an OIS carrier including a magnet according to an embodiment of the prior art. FIG. 2 is a side view of an OIS carrier equipped with a magnet according to an embodiment of the prior art. FIG. 3 is a drawing showing an example of a magnet according to an embodiment of the prior art. FIG. 4 is a perspective view showing the external appearance of a lens driving device according to an embodiment of the present invention. FIG. 5 is a perspective view showing the external appearance of a lens driving device with the cover removed according to an embodiment of the present invention. FIG. 6 is a perspective view showing the external appearance of a lens driving device with the flexible circuit board removed according to an embodiment of the present invention. FIG. 7 is a perspective view showing the external appearance of a lens driving device with a disassembled magnet and coil according to an embodiment of the present invention. FIG. 8 is a perspective view showing the external shape of a housing according to an embodiment of the present invention. FIG. 9 is a perspective view showing the external appearance of an AF carrier according to an embodiment of the present invention. FIG. 10 is a perspective view showing the external appearance of a lens driving device with the housing removed according to an embodiment of the present invention. FIG. 11 is a perspective view showing the external appearance of an OIS carrier according to an embodiment of the present invention. FIG. 12 is a perspective view showing the external appearance of an OIS carrier according to another embodiment of the present invention. FIG. 13 is a drawing showing the magnet of an OIS carrier according to an embodiment of the present invention being inserted into a magnet groove and coupled. FIG. 14 is a drawing showing a side view of an OIS carrier according to an embodiment of the present invention. FIG. 15 is a drawing showing an example of a third magnet and a fourth magnet according to an embodiment of the present invention. FIG. 16 is a drawing showing an example of a fifth magnet, a sixth magnet, a fifth magnet groove, and a sixth magnet groove according to another embodiment of the present invention. FIG. 17 is a drawing showing an example of a fifth magnet, a sixth magnet, a fifth magnet groove, and a sixth magnet groove according to another embodiment of the present invention. Specific details for implementing the invention

[0022] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are assigned the same reference number, and redundant descriptions thereof will be omitted. Furthermore, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted.

[0023] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0024] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0025] In this application, each step described may be performed regardless of the order listed, except where it must be performed in the order listed by a particular causal relationship.

[0026] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0028] Hereinafter, the lens driving device of the present invention will be described with reference to the attached drawings.

[0029] FIG. 4 is a perspective view showing the external appearance of a lens driving device according to an embodiment of the present invention, FIG. 5 is a perspective view showing the external appearance of a lens driving device with the cover removed according to an embodiment of the present invention, FIG. 6 is a perspective view showing the external appearance of a lens driving device with the flexible circuit board removed according to an embodiment of the present invention, FIG. 7 is a perspective view showing the external appearance of a lens driving device with the magnet and coil disassembled according to an embodiment of the present invention, FIG. 8 is a perspective view showing the external appearance of a housing according to an embodiment of the present invention, FIG. 9 is a perspective view showing the external appearance of an AF carrier according to an embodiment of the present invention, FIG. 10 is a perspective view showing the external appearance of a lens driving device with the housing removed according to an embodiment of the present invention, and FIG. 11 is a perspective view showing the external appearance of an OIS carrier according to an embodiment of the present invention.

[0030] A lens driving device (100) according to an embodiment of the present invention includes a cover (110), a mounting plate (111), a housing (120), an AF (Auto Focus) carrier (130), an OIS (Optical Image Stabilization) carrier (140), and a flexible circuit board (150).

[0031] As shown in FIG. 4, the lens driving device (100) has a lens opening (101) formed in the center, and exposes the front in the Z-axis direction through the lens opening (101).

[0032] Here, the lens opening (101) can be joined by inserting a lens barrel (not shown). The lens barrel is formed such that at least one optical lens is arranged with the Z-axis as the optical axis. The lens barrel can be formed so that light is not incident inside. Specifically, the lens barrel can be formed of a light-blocking material.

[0033] As shown in FIG. 8, the housing (120) is a part fixed to the lens driving device (100) and has an open center, forms a housing bottom surface (121) along a square border, and each forms four housing pillars (122) extending vertically from the corner portions of the housing bottom surface (121).

[0034] As illustrated in FIG. 8, each housing column (122) is each corner portion (' ', ' It is formed by extending vertically in a shape corresponding to ').

[0035] Each housing column (122) has a first groove (123) formed in the vertical direction on the inner surface of the vertex where two adjacent faces meet.

[0036] Here, the shape of the first groove (123) may be a vertex shape where two adjacent faces meet, or a polygon shape with three faces. It is not limited to this and may be a polygon shape with four or more faces.

[0037] The shape of the first groove (123) of the present invention may be composed of three faces, have two vertices where two faces meet, and each vertex may be formed with an obtuse angle.

[0038] The housing (120) forms a first-1 opening (124), a first-2 opening (125), a first-3 opening (126), and a first-4 opening (127), respectively, in which the side between the housing column portion (122) and the housing column portion (122) is open.

[0039] The housing (120) is joined by a flexible circuit board (150) that surrounds the outer surface of the housing column portion (122) and closes the first-1 opening (124), the first-2 opening (125), the first-3 opening (126), and the first-4 opening (127).

[0040] The flexible circuit board (150) serves to transmit signals and current from the outside to internal components. The lens driving device (100) can be driven through the signals and current transmitted by the flexible circuit board (150).

[0041] The cover (110) is in the shape of a cuboid with an open center and a hollow bottom, and is combined by covering the upper part of the housing (120) to form the outer upper part of the lens driving device (100), and forms an internal space capable of accommodating various parts inside.

[0042] The internal space created between the cover (110) and the housing (120) is where the AF carrier (130) and the OIS carrier (140) are located.

[0043] The AF carrier (130) moves up and down in the direction of the optical axis (Z-axis direction) where light is incident to perform auto-focusing of the lens.

[0044] As shown in FIG. 5, the AF carrier (130) can cover the upper surface with a mounting plate (111) to prevent the magnetic field lines of the magnet from escaping to the upper surface.

[0045] The OIS carrier (140) moves in the X-axis and Y-axis directions perpendicular to the optical axis direction to perform an anti-shake function.

[0046] The OIS carrier (140) has an open center so that a lens barrel can pass through and be joined.

[0047] The OIS carrier (140) is seated inside the AF carrier (130) and moves in the X-axis and Y-axis directions independently of the AF carrier (130) to perform an anti-shake function.

[0048] The OIS carrier (140) can move together with the AF carrier (130) when moving in the optical axis direction (Z-axis direction).

[0049] The OIS carrier (140) is the part to which the lens is attached, and moves up and down simultaneously with the AF carrier (130) during auto-focusing, and can move in the X-axis and Y-axis directions separately from the AF carrier (130) during anti-shake.

[0050] When the AF carrier (130) moves in the Z-axis direction, the OIS carrier (140) mounted inside the AF carrier (130) also moves up and down together to perform auto-focusing of the lens.

[0051] The AF carrier (130) has an open center and forms a carrier bottom surface (131) along a square border, and forms a first carrier column section (132), a second carrier column section (133), a third carrier column section (134), and a fourth carrier column section (135) extending vertically from a corner portion of the carrier bottom surface (131).

[0052] As shown in FIG. 9, each carrier column (132, 133, 134, 135) is each corner portion (' ', ' It is formed by extending vertically in a shape corresponding to ').

[0053] As illustrated in FIG. 9, the AF carrier (130) forms a first magnet groove (136) on the side between the first carrier column (132) and the second carrier column (133), forms a second magnet groove (137) on the side between the second carrier column (133) and the third carrier column (134), and forms a second opening (138) on the side between the third carrier column (134) and the fourth carrier column (135) and on the side between the fourth carrier column (135) and the first carrier column (132), respectively.

[0054] The AF carrier (130) includes a corner portion where the first surface between the first carrier column portion (132) and the second carrier column portion (133) meets the second surface between the second carrier column portion (133) and the third carrier column portion (134).

[0055] The first carrier column portion (132) is formed such that the interior angle of the vertex where the first-1 carrier column portion (132a) and the first-2 carrier column portion (132b) meet is 90 degrees, and a first ball bearing groove (132c) of a certain length is formed in the vertical direction from the lower surface opening in the first-2 carrier column portion (132b). Here, the first ball bearing groove (132c) may be a polygonal hole.

[0056] The inner surface of the second carrier column (133) has a corner portion where the first surface and the second surface meet, forming a flat portion, and extends obliquely for a certain length from both ends of the flat portion.

[0057] The outer surface of the second carrier column (133) is located at the corner where the first surface and the second surface meet, and forms a second ball bearing groove (133a) of a certain length in the vertical direction.

[0058] The second ball bearing groove (133a) forms a ball bearing seating portion (133b) at a certain height from the lower surface. A second ball bearing (161) is mounted on the upper surface of the ball bearing seating portion (133b).

[0059] The second ball bearing groove (133a) is a polygonal hole and may be a polygonal shape having three faces.

[0060] The second ball bearing groove (133a) may be composed of three faces, have two vertices where two faces meet, and each vertex may be formed with an obtuse angle.

[0061] The third carrier column (134) is formed such that the interior angle of the vertex where the third-1 carrier column (134a) and the third-2 carrier column (134b) meet is 90 degrees, and a third ball bearing groove (134c) of a certain length is formed in the vertical direction from the lower surface opening in the third-2 carrier column (134b). Here, the third ball bearing groove (134c) may be a polygonal hole.

[0062] Between the housing (120) and the AF carrier (130), a first ball bearing (160) is positioned in close contact between the first groove (123) of the housing column portion (122) and the first ball bearing groove (132c).

[0063] The first ball bearing (160) may be in contact with at least two sides of the first ball bearing groove (132c) and may be in contact with at least two sides of the first groove (123) of the housing column portion (122).

[0064] Between the housing (120) and the AF carrier (130), a second ball bearing (161) is positioned in close contact between the first groove (123) of the housing column portion (122) and the second ball bearing groove (133a).

[0065] The second ball bearing (161) may be in contact with at least two sides of the second ball bearing groove (133a) and may be in contact with at least two sides of the first groove (123) of the housing column portion (122).

[0066] Between the housing (120) and the AF carrier (130), a third ball bearing (162) is positioned in close contact between the first groove (123) of the housing column portion (122) and the third ball bearing groove (134c).

[0067] The third ball bearing (162) may be in contact with at least two sides of the third ball bearing groove (134c) and may be in contact with at least two sides of the first groove (123) of the housing column portion (122).

[0068] The AF carrier (130) moves along the first ball bearing (160), the second ball bearing (161), and the third ball bearing (162) in the direction of the optical axis (Z-axis direction) to perform auto-focusing of the lens.

[0069] As illustrated in FIG. 10, at least one of the first ball bearing (160), the second ball bearing (161), and the third ball bearing (162) is positioned at a different height. The second ball bearing (161) may be positioned higher in the height direction than the first ball bearing (160) and the third ball bearing (162) due to the ball bearing seating portion (133b). This is not limited thereto, and at least one of the first ball bearing (160), the second ball bearing (161), and the third ball bearing (162) may be configured to be positioned differently.

[0070] A first magnet (163) is installed in a vertically positioned manner in the first magnet groove (136) of the AF carrier (130), and a first coil (164) is installed at a position opposite to the first magnet (163). The first coil (164) may be located in the first opening (124) of the housing (120).

[0071] When current flows through the first coil (164), a Lorentz force in the direction of the optical axis (Z direction) is generated in the first coil (164) by the interaction between the first magnet (163) and the current flowing through the first coil (164) (Fleming's left-hand rule). The first magnet (163) can be made up of two parts to form the N pole and S pole vertically.

[0072] Since the first coil (164) is fixed to the first opening (124) of the housing (120), a reaction force acts on the first magnet (163), which is a movable part, causing it to move in the direction of the optical axis (Z direction).

[0073] The AF carrier (130) can perform auto-focusing of the lens by moving the first magnet (163) in the optical axis direction (Z direction) and, accordingly, moving the OIS carrier (140) seated inside the AF carrier (130) in the optical axis direction (Z direction).

[0074] The first magnet (163) and the first coil (164) have a stronger electrical interaction due to their structure in which they are positioned facing each other without being obstructed by other components.

[0075] A second magnet (165) is installed in a vertically positioned manner in the second magnet groove (137) of the AF carrier (130), and a second coil (166) is installed at a position opposite to the second magnet (165). The second coil (166) may be located in the first and second openings (125) of the housing (120).

[0076] When current flows through the second coil (166), a Lorentz force in the direction of the optical axis (Z direction) is generated in the second coil (166) by the interaction between the second magnet (165) and the current flowing through the second coil (166) (Fleming's left-hand rule). The second magnet (165) can be made up of two parts to form the N pole and S pole vertically.

[0077] Since the second coil (166) is fixed to the first-second opening (125) of the housing (120), a reaction force acts on the second magnet (165), which is a movable part, causing it to move in the direction of the optical axis (Z direction).

[0078] The AF carrier (130) can perform auto-focusing of the lens by moving the second magnet (165) in the optical axis direction (Z direction) and, accordingly, moving the OIS carrier (140) seated inside the AF carrier (130) in the optical axis direction (Z direction).

[0079] The second magnet (165) and the second coil (166) have a stronger electrical interaction due to their structure in which they are positioned facing each other without being obstructed by other components.

[0080] The first magnet groove (136) and the second magnet groove (137) may be open and perforated, or they may be blocked by a partition.

[0081] As illustrated in FIG. 11, the OIS carrier (140) includes a rectangular OIS carrier body (141) that is seated inside the AF carrier (130) and has a central opening through which a lens barrel equipped with multiple lenses passes and is coupled.

[0082] As illustrated in FIGS. 6, 7 and 11, the OIS carrier body (141) forms a third magnet groove (142) on a first surface corresponding to the space between the third carrier column part (134) and the fourth carrier column part (135) of the AF carrier (130), and forms a fourth magnet groove (146) on a second surface corresponding to the space between the fourth carrier column part (135) and the first carrier column part (132) of the AF carrier (130).

[0083] In the third magnet groove (142), the N pole and the S pole are inserted in a straight line with the first insulator (144) in between to form the third magnet (143), and the third coil (145a) is installed in the position facing the N pole of the third magnet (143), and the fourth coil (145b) is installed in the position facing the S pole.

[0084] The third coil (145a) and the fourth coil (145b) are formed with the second insulator (148) in between and can be located in the first-third opening (126) of the housing (120).

[0085] The portions facing the third coil (145a) and the fourth coil (145b) may have a single polarity of N and S poles.

[0086] In this case, when current flows through the third coil (145a), the force generated between the third coil (145a) and the N pole may be such that magnetic field lines are directed toward or away from the N pole as current flows through the third coil (145a), and accordingly, magnetic attraction or repulsion may be generated between the N pole and the third coil (145a).

[0087] When current flows through the fourth coil (145b), the force generated between the fourth coil (145b) and the S pole can be such that magnetic field lines are directed toward or away from the S pole as current flows through the fourth coil (145b), and accordingly, magnetic attraction or repulsion can be generated between the S pole and the fourth coil (145b).

[0088] In the fourth magnet groove (146), the N pole and the S pole are inserted in a straight line with the second insulator (148) in between to form the fourth magnet (147), and the fourth magnet (147) has a fifth coil (149a) installed at a position opposite the N pole and a sixth coil (149b) installed at a position opposite the S pole.

[0089] The fifth coil (149a) and the sixth coil (149b) are formed with the second insulator (148) in between and can be located in the first-fourth opening (127) of the housing (120).

[0090] The portions facing the fifth coil (149a) and the sixth coil (149b) may have a single polarity of N and S poles.

[0091] In this case, when current flows through the fifth coil (149a), the force generated between the fifth coil (149a) and the N pole may be such that magnetic field lines are directed toward or away from the N pole as current flows through the fifth coil (149a), and accordingly, magnetic attraction or repulsion may be generated between the N pole and the fifth coil (149a).

[0092] When current flows through the sixth coil (149b), the force generated between the sixth coil (149b) and the S pole can be such that magnetic field lines are directed toward or away from the S pole as current flows through the sixth coil (149b), and accordingly, magnetic attraction or repulsion can be generated between the S pole and the sixth coil (149b).

[0093] The OIS carrier (140) performs an anti-shake function by moving in the X-axis and Y-axis directions perpendicular to the optical axis direction using the third magnet (143), the third coil (145a), the fourth coil (145b), the fourth magnet (147), the fifth coil (149a), and the sixth coil (149b), separately from the AF carrier (130).

[0094] The lens driving device (100) of the present invention implements a three-point support structure of ball bearings in the AF carrier (130), but is not limited thereto, and may also implement a three-point support structure of ball bearings in the OIS carrier (140) by configuring the housing (120), OIS carrier (140), and AF carrier (130) in that order.

[0095] In another embodiment, the third magnet (143) and the fourth magnet (147) may be formed with different lengths.

[0096] FIG. 12 is a perspective view showing the external shape of an OIS carrier according to another embodiment of the present invention, FIG. 13 is a drawing showing the magnet of an OIS carrier according to an embodiment of the present invention being inserted into and coupled to a magnet groove, FIG. 14 is a drawing showing the side view of an OIS carrier according to an embodiment of the present invention, and FIG. 15 is a drawing showing an example of a third magnet and a fourth magnet according to an embodiment of the present invention.

[0097] The shape of the third magnet groove (142) of the OIS carrier (140) is not a square shape, but is open vertically, and the left and right ends are formed in a curved shape (142a, 142b).

[0098] The shape of the fourth magnet groove (146) of the OIS carrier (140) is not a square shape, but is open vertically, and the left and right ends are formed in a curved shape (146a, 146b).

[0099] The third magnet groove (142) is connected by inserting the third magnet (143), and the fourth magnet groove (146) is connected by inserting the fourth magnet (147).

[0100] The third magnet groove (142) and the fourth magnet groove (146) form an epoxy insertion groove (141a) that can inject epoxy into the inner surface.

[0101] The third magnet (143) and the fourth magnet (147) can be attached to the third magnet groove (142) and the fourth magnet groove (146) by epoxy.

[0102] The third magnet (143) and the fourth magnet (147) can form curved sections (143a, 143b) with curved ends.

[0103] The third magnet (143) and the fourth magnet (147) are changed from a square shape to an elliptical shape.

[0104] The third magnet groove (142) can be formed in an arc shape such that the left and right ends correspond to the curved portions (143a, 143b) of both ends of the third magnet (143).

[0105] The fourth magnet groove (146) can be formed in an arc shape such that the left and right ends correspond to the curved portions (147a, 147b) of both ends of the fourth magnet (147).

[0106] Since the third magnet groove (142) and the fourth magnet groove (146) are open at the top and bottom, the height of the drive unit can be reduced, thereby making the thickness of the OIS carrier (140) slimmer.

[0107] FIG. 16 is a drawing showing an example of a fifth magnet, a sixth magnet, a fifth magnet groove, and a sixth magnet groove according to another embodiment of the present invention.

[0108] The OIS carrier body (141) forms a fifth magnet groove (180) into which a fifth magnet (170) is inserted and coupled on one side, and forms a sixth magnet groove (193) into which a sixth magnet (190) is inserted and coupled on the other side diagonally adjacent to the one side.

[0109] The fifth magnet (170) and the sixth magnet (190) can form curved sections (171, 172, 191, 192) with curved ends.

[0110] The fifth magnet groove (180) can be formed in an arc shape (181, 182) such that the left and right ends correspond to the curved portions (171, 172) of both ends of the fifth magnet (170).

[0111] The sixth magnet groove (193) can be formed in an arc shape (194, 195) such that the left and right ends correspond to the curved portions (191, 192) of both ends of the sixth magnet (190).

[0112] The curved portions (171, 172, 191, 192) at both ends of the fifth magnet (170) and the sixth magnet (190) are formed with different radii of curvature, and the N pole and S pole are distinguished according to the radius of curvature.

[0113] The fifth magnet groove (180) can be formed in a shape corresponding to both ends of the fifth magnet (170).

[0114] The sixth magnet groove (193) can be formed in a shape corresponding to both ends of the sixth magnet (190).

[0115] In another embodiment, the fifth magnet (170) and the sixth magnet (190) may be formed with different lengths.

[0116] The fifth magnet (170) and the sixth magnet (190) can be prevented from being inserted incorrectly into the fifth magnet groove (180) and the sixth magnet groove (193) by having different radii of curvature at both ends.

[0117] FIG. 17 is a drawing showing an example of a fifth magnet, a sixth magnet, a fifth magnet groove, and a sixth magnet groove according to another embodiment of the present invention.

[0118] The OIS carrier body (141) forms a fifth magnet groove (180) into which a fifth magnet (170) is inserted and coupled on one side, and forms a sixth magnet groove (193) into which a sixth magnet (190) is inserted and coupled on the other side diagonally adjacent to the one side.

[0119] The fifth magnet (170) and the sixth magnet (190) can form curved sections (171, 172, 191, 192) with curved ends.

[0120] The fifth magnet groove (180) can be formed in an arc shape (181, 182) such that the left and right ends correspond to the curved portions (171, 172) of both ends of the fifth magnet (170).

[0121] The sixth magnet groove (193) can be formed in an arc shape (194, 195) such that the left and right ends correspond to the curved portions (191, 192) of both ends of the sixth magnet (190).

[0122] Both ends of the fifth magnet (170) form a radius of curvature R1 and a radius of curvature R2, and both ends of the sixth magnet (190) form a radius of curvature R3 and a radius of curvature R4.

[0123] Here, the radii of curvature R1, R2, R3, and R4 can each be formed with different radii of curvature.

[0124] The fifth magnet groove (180) and the sixth magnet groove (193) are open vertically, and the left and right ends are formed in arc shapes (181, 182, 194, 195) corresponding to each radius of curvature R1, R2, R3, and R4.

[0125] The fifth magnet (170) and the sixth magnet (190) distinguish between the N pole and the S pole according to the radius of curvature.

[0126] The ends of the fifth magnet (170) and the ends of the sixth magnet (190) have different radii of curvature, so that the fifth magnet (170) and the sixth magnet (190) are prevented from being inserted incorrectly into the fifth magnet groove (180) and the sixth magnet groove (193).

[0127] The technical features disclosed in each embodiment of the present invention are not limited to that embodiment only, and as long as they are not mutually incompatible, the technical features disclosed in each embodiment may be combined and applied to different embodiments.

[0128] Therefore, in each embodiment, the technical features are described primarily, but as long as the technical features are not mutually incompatible, they may be combined and applied together.

[0129] The present invention is not limited to the embodiments described above and the attached drawings, and various modifications and variations may be possible from the perspective of those skilled in the art to which the present invention belongs. Accordingly, the scope of the present invention should be defined not only by the claims of this specification but also by equivalents thereof. Explanation of the symbols

[0130] 10: OIS Carrier 11: Magnet Home 12: Magnet 13: Inclined surface 14: Magnet Guide 100: Lens Driving Device 101: Lens aperture 110: Cover 111: Mounting plate 120: Housing 121: Housing bottom surface 122: Housing pillar section 123: 1st groove 124: 1-1 opening 125: 1st-2nd opening 126: 1st-3rd opening 127: Openings 1-4 130: AF Carrier 131: Carrier bottom surface 132: First carrier pillar section 132a: 1-1 Carrier Pillar Section 132b: 1-2 Carrier Pillar Section 132c: First ball bearing groove 133: Second carrier column 133a: Second ball bearing groove 133b: Ball bearing seating portion 134: 3rd Carrier Pillar 134a: 3-1st Carrier Pillar 134b: 3-2 Carrier Pillar 134c: 3rd Ball Bearing Groove 135: 4th carrier pillar 136: 1st magnet groove 137: Second magnet groove 138: Second opening 140: OIS Carrier 141: OIS Carrier Body 141a: Epoxy insertion groove 142: Third magnet groove 142a, 142b: Curved shape 143: Third magnet 143a, 143b: Curved sections 144: First insulator 145a: 3rd coil 145b: 4th coil 146: 4th magnet groove 146a, 146b: Curved shape 147: 4th magnet 147a, 147b: Curved part 148: Second insulator 149a: Fifth coil 149b: 6th coil 150: Flexible circuit board 160: 1st ball bearing 161: 2nd ball bearing 162: 3rd ball bearing 163: 1st magnet 164: 1st coil 165: 2nd magnet 166: 2nd coil 170: 5th magnet 171, 172: Curved section 180: 5th magnet groove 181, 182: Arc shape 190: 6th magnet 191, 192: Curved section 193: 6th magnet groove 194, 195: Arc shape

Claims

Claim 1 A lens driving device comprising: a housing; and a carrier formed inside the housing, with a central opening for focusing a lens, wherein the carrier includes a first magnet groove formed on one side and into which a first magnet is inserted and coupled, wherein both ends of the first magnet are formed in a curved shape, the first magnet groove is open vertically, and the left and right ends are formed in an arc shape corresponding to both ends of the first magnet in the curved shape, and the two ends of the first magnet are formed with different radii of curvature, and the N pole and S pole are distinguished according to the radius of curvature. Claim 2 A lens driving device according to claim 1, further comprising an AF (Auto Focus) carrier formed inside the housing and moving up and down in the direction of the optical axis where light is incident to perform auto focusing of the lens. Claim 3 A lens driving device according to claim 2, comprising an OIS (Optical Image Stabilization) carrier that is seated inside the AF carrier, has a lens barrel with an open center and is equipped with a lens, and moves in the X-axis and Y-axis directions perpendicular to the optical axis direction to perform an image stabilization function. Claim 4 delete Claim 5 A lens driving device according to claim 1, wherein the carrier further includes a second magnet groove formed on the other side diagonally adjacent to the first side and into which a second magnet is inserted and coupled, wherein the second magnet has both ends formed in a curved shape, the second magnet groove is open vertically, and the left and right ends are formed in an arc shape corresponding to both ends of the second magnet with the curved shape. Claim 6 In claim 5, the first magnet and the second magnet are a lens driving device in which the N pole and the S pole are formed in a straight line. Claim 7 In claim 5, the lens driving device wherein the first magnet and the second magnet are formed with different lengths. Claim 8 A lens driving device according to claim 5, wherein both ends of the first magnet and both ends of the second magnet are formed with different radii of curvature, radii of curvature R1, R2, R3, and R4, respectively. Claim 9 A lens driving device according to claim 8, wherein the first magnet groove and the second magnet groove have left and right ends formed in an arc shape corresponding to each radius of curvature R1, the radius of curvature R2, the radius of curvature R3, and the radius of curvature R4.

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