Lens driving device and camera device comprising same

Abstract

An embodiment comprises: a housing; a bobbin disposed in the housing; a ball member disposed between the bobbin and the housing; a first magnetic body which is disposed on a first side portion of the bobbin, and which includes a first magnetic unit and a second magnetic unit disposed to be spaced apart from each other; a second magnetic body which is disposed in the housing so as to correspond to the first magnetic body, and which attracts the first magnetic body; and a shape memory alloy member including a first end portion coupled to one area of the housing, a second end portion coupled to another area of the housing, and a first area connected to a part of the first side portion of the bobbin, wherein the shape memory alloy member moves the bobbin in the optical axis direction, and the first area of the shape memory alloy member is disposed between the first magnetic unit and the second magnetic unit.

Description

Lens driving device and camera device including the same

[0001] An embodiment relates to a lens driving device and a camera device including the same.

[0002] Since it is difficult to apply the voice coil motor (VCM) technology used in conventional camera modules to ultra-compact, low-power camera modules, research in this regard has been actively conducted.

[0003] The demand for and production of electronic products, such as smartphones and mobile phones equipped with cameras, are increasing. Mobile phone cameras are trending toward higher pixel counts and miniaturization, and accordingly, actuators are also becoming smaller, larger in diameter, and multi-functional. To implement high-pixel mobile phone cameras, improvements in camera performance and additional features such as autofocus, shutter shake reduction, and zoom capabilities are required.

[0004] The embodiment provides a lens driving device and a camera device including the same, which can prevent tilting of the bobbin and secure a stable holding force during AF driving.

[0005] In addition, the embodiment provides a lens driving device capable of reliably preventing a shape memory alloy member from detaching from an OIS moving part, and a camera device including the same.

[0006] A lens driving device according to an embodiment comprises: a housing; a bobbin disposed within the housing; a ball member disposed between the bobbin and the housing; a first magnetic body comprising a first magnetic unit and a second magnetic unit disposed on a first side of the bobbin and spaced apart from each other; a second magnetic body disposed in the housing to correspond to the first magnetic body and having an attractive force with the first magnetic body; and a shape memory alloy member comprising a first end portion coupled to one area of ​​the housing, a second end portion coupled to another area of ​​the housing, and a first area connected to a part of the first side of the bobbin, wherein the shape memory alloy member moves the bobbin in the direction of the optical axis, and the first area of ​​the shape memory alloy member is disposed between the first magnetic unit and the second magnetic unit.

[0007] The bobbin may include a coupling portion that protrudes from the outer surface of the first side of the bobbin and into which the first region of the shape memory alloy member is inserted. The coupling portion may be disposed between the first magnetic unit and the second magnetic unit.

[0008] The housing includes a first side facing the first side of the bobbin, and the second magnetic body includes a third magnetic unit that exerts an attractive force with the first magnetic unit and a fourth magnetic unit that exerts an attractive force with the second magnetic unit, and the third and fourth magnetic units may be disposed between the first side of the bobbin and the first side of the housing.

[0009] A lens driving device according to another embodiment comprises: a housing including a first side and a second side located opposite each other and a third side and a fourth side located opposite each other and disposed between the first side and the second side; a bobbin disposed within the housing; and a shape memory alloy member for moving the bobbin in the direction of an optical axis, wherein the shape memory alloy member comprises a first end portion coupled to one area of ​​the housing, a second end portion coupled to another area of ​​the housing, a first area connected to a part of the first side of the bobbin opposite to the first side of the housing, a second area connecting the first end portion and the first area, and a third area connecting the second end portion and the first area, wherein the housing comprises a partition wall disposed between the first side of the bobbin and the first side of the housing, and at least a part of the second area of ​​the shape memory alloy member and at least a part of the third area are disposed between the first side of the housing and the partition wall.

[0010] The bobbin may include a coupling portion that protrudes from the outer surface of the first side of the bobbin and into which the first region of the shape memory alloy member is inserted. The partition wall of the housing may include a first opening through which the coupling portion of the bobbin passes. The first side of the housing may include a second opening that exposes the coupling portion of the bobbin.

[0011] The lens driving device may include a detachment prevention member disposed on the coupling portion of the bobbin and covering at least a portion of the first region of the shape memory alloy member.

[0012] The housing includes a guide portion disposed between the first side of the housing and the partition wall, wherein the second region and the third region of the shape memory alloy member are disposed therein, and the upper or lower surface of the guide portion may include an inclined surface. The lens driving device may include a sliding member disposed between the first side of the bobbin and the partition wall of the housing.

[0013] The lens driving device may include a first magnetic body disposed on the first side of the bobbin; and a second magnetic body disposed on the partition of the housing and having an attractive force with the first magnetic body.

[0014] The first magnetic body comprises a first magnetic unit and a second magnetic unit spaced apart from each other, and the first region of the shape memory alloy member may be positioned between the first magnetic unit and the second magnetic unit.

[0015] The above sliding member includes a first ball member and a second ball member spaced apart from each other, the first magnetic unit is disposed between the first ball member and the first region of the shape memory alloy member, and the second magnetic unit may be disposed between the second ball member and the first region of the shape memory alloy member.

[0016] A lens driving device according to an embodiment comprises: a moving part; a support frame spaced apart from the moving part; a shape memory alloy member comprising a first end portion coupled to one area of ​​the support frame, a second end portion coupled to another area of ​​the support frame, and a first area connected to the moving part, and moving the moving part in a direction perpendicular to the optical axis direction; an elastic member comprising a first coupling portion coupled to the moving part, a second coupling portion coupled to the support frame, and a connecting portion connecting the first coupling portion and the second coupling portion; and an anti-detachment portion connected to the first coupling portion and overlapping with the first area of ​​the shape memory alloy member in the optical axis direction.

[0017] The above-mentioned moving part may include a moving frame disposed on the support frame so as to be spaced apart from the support frame and coupled with the first region of the shape memory alloy member.

[0018] The above-described movable frame includes a coupling portion protruding from the lower surface of the frame and connected to the first coupling portion, and a projection disposed on the lower surface of the frame so as to be spaced apart from the coupling portion, and the first region of the shape memory alloy member may be disposed between the coupling portion of the movable frame and the projection. The anti-detachment portion may be coupled to the projection of the movable frame. The projection may include a groove in which at least a portion of the anti-detachment portion is disposed. The anti-detachment portion may include a portion that is bent from the first coupling portion of the elastic member.

[0019] The above-mentioned moving frame includes a first side and a second side located opposite each other, and a third side and a fourth side located opposite each other and disposed between the first side and the second side, and the above-mentioned supporting frame includes first to fourth sides corresponding to the first to fourth sides of the moving frame, and the above-mentioned shape memory alloy member includes a first shape memory alloy member connecting the first side and the fourth side of the supporting frame, a second shape memory alloy member connecting the first side and the third side of the supporting frame, a third shape memory alloy member connecting the second side and the third side of the supporting frame, and a fourth shape memory alloy member connecting the second side and the fourth side of the supporting frame, and each of the above-mentioned first to fourth shape memory alloy members may include the first region.

[0020] The first regions of the first to fourth shape memory alloy members may be arranged to be located opposite each other in the diagonal direction of the movable frame. The width of the connecting portion may be smaller than the width of the first coupling portion and the width of the second coupling portion.

[0021] The lens driving device may include a conductive member coupled to the support frame and electrically connected to the shape memory alloy member; a circuit board disposed below the support frame and electrically connected to the conductive member; and a base disposed below the circuit board.

[0022] The above-mentioned movable frame includes a movable support protruding from the lower surface, and the base includes a protrusion protruding from the upper surface, and the movable support may come into contact with the protrusion of the base. The circuit board may include a relief portion through which the protrusion of the base passes.

[0023] The above-mentioned movable frame includes an opening penetrating the movable frame in the direction of the optical axis, and at least a portion of the first coupling portion of the elastic member and at least a portion of the anti-detachment portion may be disposed between the corner of the movable frame and the opening of the movable frame. The anti-detachment portion may be disposed below the first region of the shape memory alloy member.

[0024] A lens driving device according to another embodiment comprises: a moving frame; a support frame spaced apart from the moving frame; a first end portion coupled to one area of ​​the support frame, a second end portion coupled to another area of ​​the support frame, a first area connected to the moving frame, a second area connecting the first end portion and the first area, and a third area connecting the first area and the second end portion, and a shape memory alloy member that moves the moving frame in a direction perpendicular to the optical axis direction; an elastic member comprising a first coupling portion coupled to the moving frame, a second coupling portion coupled to the support frame, and a connecting portion connecting the first coupling portion and the second coupling portion; and an anti-detachment portion extending from the first coupling portion and overlapping with the first area of ​​the shape memory alloy member in the optical axis direction.

[0025] The width of the above-mentioned anti-detachment part may be smaller than the width of the first coupling part and the width of the second coupling part, and larger than the width of the connecting part.

[0026] In the embodiment, magnetic units for securing a holding force to support the bobbin may be arranged on both sides of the connection portion between the shape memory alloy member and the bobbin. As a result, in the embodiment, tilting of the bobbin can be prevented during AF driving, and a stable holding force can be secured.

[0027] In addition, in the embodiment, the magnetic unit can be designed solely for the purpose of securing holding force, so the size of the magnetic unit can be designed to be small, which reduces the weight of the AF moving part and improves the degree of design freedom of the AF moving part.

[0028] In addition, in the embodiment, by installing a partition, spatial interference or collision between the shape memory alloy member and the bobbin can be prevented, damage or disconnection of the shape memory alloy member can be prevented, and the reliability of AF drive can be ensured.

[0029] In addition, in the embodiment, smooth contraction or expansion of the shape memory alloy member may be possible through the chamfered surface formed between the bulkhead and the inner surface of the side of the housing, and breakage or damage to the shape memory alloy member may be prevented.

[0030] In the embodiment, both ends of the shape memory alloy member for OIS driving are fixed to the middle part of the side (or edge) of the fixed part, and the middle part of the shape memory alloy member connected to the OIS moving part is positioned adjacent to the corner of the fixed part, thereby increasing the stroke range of the OIS moving part.

[0031] In the embodiment, an elastic member may be provided separately from the shape memory alloy member, and the OIS moving part can be stably supported.

[0032] In addition, in the embodiment, the anti-detachment part can be connected to an elastic member, and thereby, the shape memory alloy member can be reliably prevented from detaching from the OIS moving part.

[0033] In the embodiment, the first connecting part of the elastic member is positioned adjacent to a projection of the frame on which the middle part of the shape memory alloy member is caught or supported. As a result, when driving the OIS, the OIS moving part can be stably supported and tilting of the OIS moving part can be prevented.

[0034] Figure 1 is an exploded view of a lens driving device according to an embodiment.

[0035] FIG. 2 is a perspective view of the lens driving device of FIG. 1 with the cover member removed.

[0036] Figure 3 is an exploded view of the autofocusing unit.

[0037] FIG. 4a is a first perspective view of a bobbin, a first magnetic body, a sensing magnet, a sliding member, a shape memory alloy member, a housing, an upper conductive member, a circuit board, and a moving frame.

[0038] FIG. 4b is a second perspective view of a bobbin, a first magnetic body, a sensing magnet, a sliding member, a shape memory alloy member, a housing, a lower conductive member, a circuit board, and a moving frame.

[0039] FIG. 5 is a perspective view of an auto-focusing part with the first side of the housing removed.

[0040] Fig. 6 is a front view of Fig. 5.

[0041] Figure 7 is a partial enlarged view of the bobbin and shape memory alloy member.

[0042] Figure 8 is a perspective view of the OIS unit.

[0043] Figure 9 is a first exploded view of the OIS unit.

[0044] Figure 10 is a second exploded view of the OIS unit.

[0045] FIG. 11 is a bottom view of a lens driving device with the cover member, base, and circuit board removed.

[0046] Figure 12 is a partial enlarged view of the lens driving device.

[0047] FIG. 13 is a bottom view of a lens driving device with the cover member and base removed.

[0048] FIG. 14 is a cross-sectional view of the lens driving device in the AB direction of FIG. 2.

[0049] FIG. 15 is a cross-sectional view of the lens driving device in the CD direction of FIG. 11.

[0050] FIG. 16 is a cross-sectional view of the lens driving device in the EF direction of FIG. 11.

[0051] FIG. 17a is a diagram illustrating the diagonal driving of an OIS moving part according to driving signals applied to shape memory alloy members.

[0052] FIG. 17b is a diagram illustrating the driving of the OIS moving part in the XY-axis direction according to driving signals applied to the shape memory alloy members.

[0053] FIG. 18 shows an exploded perspective view of a camera device according to an embodiment.

[0054] FIG. 19 shows a perspective view of an optical device according to an embodiment.

[0055] Figure 20 shows a configuration diagram of the optical device illustrated in Figure 19.

[0056]

[0057] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0058] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0059] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0060] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention. In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C.

[0061] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are used merely to distinguish the components from other components and are not intended to limit the essence, order, or sequence of the components.

[0062] Furthermore, where it is stated that a component is 'connected,' 'combined,' or 'joined' to another component, this may include not only cases where the component is directly connected, combined, or joined to the other component, but also cases where it is 'connected,' 'combined,' or 'joined' due to another component located between the component and the other component. Additionally, where it is stated that a component is formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Moreover, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0063] A lens driving device according to an embodiment can perform an 'auto-focusing function'. Here, the auto-focusing function refers to automatically focusing an image of a subject onto the image sensor surface. A lens driving device according to an embodiment can perform an auto-focusing operation by moving a lens module (or bobbin) in a first direction.

[0064] In addition, the lens driving device according to the embodiment can perform a 'hand image stabilization function'. Here, the hand image stabilization function refers to the ability to prevent the outline of a captured image from being formed clearly due to vibrations caused by the user's hand shake when capturing a still image. The lens driving device according to the embodiment can perform the hand image stabilization operation by moving the lens module (or bobbin) or the OIS (Optical Image Stabilization) moving part in a direction perpendicular to the first direction.

[0065] The lens driving device described below may be replaced with terms such as lens driving part, actuator, or lens moving device, and the term "elastic member" may be replaced with "elastic unit" or "spring." Additionally, in the following description, "terminal" may be replaced with terms such as pad, electrode, conductive layer, or bonding part.

[0066] For convenience of explanation, the camera device according to the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using other coordinate systems, and the embodiment is not limited thereto. In each drawing, the x-axis and y-axis represent directions perpendicular to the z-axis, which is the direction of the optical axis. The z-axis direction, which is the direction of the optical axis (OA), can be defined as any one of the 'first direction', 'second direction', and 'third direction', the x-axis direction can be defined as another of the 'first direction', 'second direction', and 'third direction', and the y-axis direction can be defined as the remaining other of the 'first direction', 'second direction', and 'third direction'. The direction of the optical axis may be the direction of the optical axis or a direction parallel to the optical axis. Additionally, the optical axis may be the optical axis of the lens. Or, for example, the optical axis may be an axis perpendicular to the imaging area (or sensor surface) of the image sensor and passing through the center of the imaging area (or sensor surface).

[0067] FIG. 1 is an exploded view of a lens driving device (100) according to an embodiment, FIG. 2 is a perspective view of the lens driving device (100) of FIG. 1 with the cover member (300) removed, FIG. 3 is an exploded view of an auto-focusing unit (10), FIG. 4a is a first perspective view of a bobbin (110), a first magnetic body (15), a sensing magnet (180), a sliding member (25), a shape memory alloy member (50), a housing (140), an upper conductive member (60), a circuit board (190), and a movable frame (160), FIG. 4b is a second perspective view of a bobbin (110), a first magnetic body (15), a sensing magnet (180), a sliding member (25), a shape memory alloy member (50), a housing (140), a lower conductive member (70), a circuit board (190), and a movable frame (160), FIG. 5 is a view of the housing (140). Figure 6 is a perspective view of the auto-focusing part (10) with the first side (141A) removed, Figure 5 is a front view, and Figure 7 is a partial enlarged view of the bobbin (110) and the shape memory alloy member (50).

[0068] Referring to FIGS. 1 through 7, the lens driving device (100) may include an auto-focusing unit (10). The auto-focusing unit (10) may perform an auto-focusing function. The lens driving device (100) may include an OIS unit (20). The OIS unit (20) may move the OIS moving unit in a direction perpendicular to the first direction and perform an image stabilization operation. The OIS unit may be referred to as an "image stabilization unit." The lens driving device (100) may include a cover member (300) for accommodating at least one of the auto-focusing unit (10) and the OIS unit (20).

[0069] The auto focusing unit (10) may include an AF (Auto Focus) fixed unit, an AF moving unit, a shape memory alloy member (50) that connects the AF fixed unit and the AF moving unit and moves the AF moving unit in the direction of the optical axis, a sliding member (25) disposed between the fixed unit and the AF moving unit, a first magnetic body (15) disposed in the AF moving unit, and a second magnetic body (23) disposed in the fixed unit.

[0070] The AF fixed part may be a fixed element or configuration that does not move in the direction of the optical axis together with the AF moving part. The AF fixed part may be a fixed configuration or element in terms of auto-focusing operation. The AF moving part may be an element or configuration that moves in the direction of the optical axis relative to the AF fixed part. The AF fixed part may include a housing (140) and a configuration coupled to the housing (140). The AF fixed part may further include a circuit board (190) and a configuration coupled to the circuit board (190). The AF fixed part may further include at least one of a second magnetic body (23), a conductive member (60, 70), and a moving frame (160).

[0071] The AF moving unit may include a bobbin (110) and a configuration coupled to the bobbin (110). The AF moving unit may include a first magnetic body (15). The AF moving unit may include at least one of an anti-detachment unit (80), a sensing magnet (180), and a ball cover (135). In another embodiment, the AF moving unit may further include a lens module (400).

[0072] The bobbin (110) may be placed inside the cover member (300). The bobbin (110) may be placed on the movable frame (160). The bobbin (110) may be placed on the OIS unit (20). The lens module (400) may be coupled to or mounted on the bobbin (110). The bobbin (110) may be placed inside the housing (140). The bobbin (110) may be moved in the direction of the optical axis (OA) or a first direction (e.g., the Z-axis direction) by the shape memory alloy member (50). The bobbin (110) may also be referred to as a "lens carrier" or a "lens holder".

[0073] The bobbin (110) may have an opening (101) for mounting a lens module (400). For example, the opening (101) may be a hole or a through hole that penetrates the bobbin (110) in the direction of the optical axis. The bobbin (110) may include at least one first stopper (114A) disposed on the upper surface. Additionally, the bobbin (110) may include at least one second stopper (114B) disposed on the lower surface.

[0074] The bobbin (110) may include first and second sides (110A, 110B) located opposite each other in a second direction (e.g., X-axis direction) and third and fourth sides (110C, 110D) positioned between the first and second sides (110A, 110B) and located opposite each other in a third direction (e.g., Y-axis direction). The bobbin (110) may include a groove (8) formed on one side (e.g., 110A) of the bobbin (110) to accommodate a first magnetic body (15). The groove (8) may include a first groove (8A) and a second groove (8B) spaced apart from each other. The first groove (8A) can accommodate the first magnetic unit (15A) of the first magnetic body (15), and the second groove (8B) can accommodate the second magnetic unit (15B) of the first magnetic body (15).

[0075] The bobbin (110) may include at least one protrusion (117) protruding from the outer surface of at least one side of the bobbin (110). The bobbin (110) may include a protrusion (117A) protruding from the outer surface of the first side (110A) of the bobbin (110). Additionally, the bobbin (110) may include a protrusion (117B) protruding from the outer surface of the second side (110B) of the bobbin (110). For example, the protrusion (117A) and the protrusion (117B) may be located on opposite sides of each other with respect to the optical axis.

[0076] The bobbin (110) may include a connecting portion (118) for connecting or joining a portion of the shape memory alloy member (50). The connecting portion (118) may be positioned on one side of the bobbin (110) (e.g., a first side (110A)). The connecting portion (118) may be positioned on the outer surface of one side of the bobbin (110) (e.g., a first side (110A)). The connecting portion (118) may protrude from the outer surface of the first side (110A) of the bobbin (110). The first protrusion (117A) may include the connecting portion (118). For example, the connecting portion (118) may be formed on the first protrusion (117A) of the bobbin (110).

[0077] For example, the first protrusion (117A) may have a stepped structure including a first step protruding from the outer surface of the first side (110A) of the bobbin (110) and a second step protruding from the first step. The connecting part (118) may correspond to the second step of the protrusion (117A). In another embodiment, the second step may be omitted, and the connecting part (118) may be the protrusion (117A) of the first step.

[0078] The bobbin (110) may include at least one guide groove (9) for positioning or receiving at least a portion of the slip member (25). The guide groove (9) may be formed on the first side (110A) of the bobbin (110). The guide groove (9) may be referred to as a "groove," "receiving groove," "guide portion," or "guide rail." For example, the guide groove (9) may include a first guide groove (9A) and a second guide groove (9B) spaced apart from each other. For example, the first groove (8A) may be positioned between the first guide groove (9A) and the first protrusion (117A), and the second groove (8B) may be positioned between the second guide groove (9B) and the first protrusion (117A). The shape of the groove (9) may be polygonal, semicircular, or semi-elliptical. For example, the shape of the groove (9) can be a 'V', 'U', or 'ㄷ' shape.

[0079] The guide groove (9) may be opened at its upper end to the upper surface of the bobbin (110). The lens driving device (100) may further include a ball cover (135) that covers the opening of the guide groove (9) that is opened to the upper surface of the bobbin (110). The ball cover (135) may prevent the sliding member (25) from coming out of the guide groove (9). The ball cover (135) may include a first ball cover (135A) that covers the opening of the first guide groove (9A) and a second ball cover (135B) that covers the opening of the first guide groove (9A).

[0080] The bobbin (110) may include a groove (18A) for receiving a sensing magnet (180). The groove (18A) may be formed on any other side of the bobbin (110) (e.g., 110C). For example, the groove (18A) may be formed on any one of the second to fourth sides of the bobbin (110).

[0081] The first magnetic body (15) may be placed on the bobbin (110). The first magnetic body (15) may be coupled to the bobbin (110). The first magnetic body (15) may be placed on the first side (110A) of the bobbin (110). The first magnetic body (15) may be coupled to the first side (110A) of the bobbin (110).

[0082] The first magnetic body (15) may include a first magnetic unit (15A) and a second magnetic unit (15B) spaced apart and disposed on the first side (110A) of the bobbin (110). The first magnetic unit (15A) may be disposed within the first groove (8A) of the bobbin (110), and the second magnetic unit (15B) may be disposed within the second groove (8B) of the bobbin (110). The first magnetic unit (8A) may be disposed between the first ball member (25A) and the first protrusion (117A) (or coupling part (118)) of the bobbin (110). The second magnetic unit (8B) may be disposed between the second ball member (25B) and the first protrusion (117A) (or coupling part (118)) of the bobbin (110). The first protrusion (117A) (or coupling part (118)) of the bobbin (110) may be positioned between the first magnetic unit (15A) and the second magnetic unit (15B). The first magnetic unit (15A) may be positioned between the first ball member (25A) and the first region (51A, 52A) of the shape memory alloy member (50). The second magnetic unit (15B) may be positioned between the second ball member (25B) and the first region (51A, 52A) of the shape memory alloy member (50).

[0083] The sensing magnet (180) may be placed on the bobbin (110) or coupled with the bobbin (110). The sensing magnet (180) may be placed on the third side (110C) of the bobbin (110). For example, the sensing magnet (180) may be placed within the groove (18A) of the bobbin (110). When AF is driven, the sensing magnet (180) may be moved in the optical axis direction (OA) together with the bobbin (110). In another embodiment, the autofocus unit (10) may further include a balancing member (not shown) for weight balancing with the sensing magnet (180), wherein the balancing member may be placed on or coupled with the fourth side (110D) of the bobbin (110).

[0084] Referring to FIGS. 3 and 4a, the housing (140) may be disposed within the cover member (300) and may accommodate at least a portion of the bobbin (110). The housing (140) may include a cavity, hole, or opening (201) for accommodating the bobbin (110). The housing (140) may include a plurality of sides (141A to 141D) corresponding to or opposite to the sides (110A to 110D) of the bobbin (110).

[0085] The housing (140) may include first and second sides (141A, 141B) located opposite each other in a second direction (e.g., X-axis direction) and third and fourth sides (141C, 141D) positioned between the first and second sides (141A, 141B) and located opposite each other in a third direction (e.g., Y-axis direction). The sides (141A to 141D) of the housing (140) may correspond to the side plates (302) of the cover member (300), and each of the sides (141A to 141D) may be positioned parallel to any one of the corresponding side plates (302).

[0086] The housing (140) may include at least one stopper (147) disposed on the upper surface. The stopper (147) may prevent the upper, top, or upper surface of the housing (140) from directly colliding with the inner surface of the top plate of the cover member (300). The housing (140) may further include a stopper (149) disposed on at least one of the sides (141A to 141D) of the housing (140).

[0087] The housing (140) may include at least one protrusion (148A) disposed on the lower surface. The protrusion (148A) may correspond to, oppose, or overlap with the groove (148B) of the movable frame (160) in the optical axis direction, and the protrusion (148A) of the housing (140) and the groove (148B) of the movable frame (160) may be coupled to each other.

[0088] The housing (140) may include a partition (145) connected to the inner side of the side of the housing (140). The partition (145) may be positioned between the first side (141A) of the housing (140) and the first side of the bobbin (110). The partition (145) may be spaced apart from the first side (141A) of the housing (140).

[0089] A space may be formed between the partition wall (145) and the first side (141A) of the housing (140) for arranging at least a portion of the shape memory alloy member (50). That is, at least a portion of the shape memory alloy member (50) may be arranged between the partition wall (145) and the first side (141A) of the housing (140). For example, at least a portion of the second region (51B, 52B) and at least a portion of the third region (51C, 52C) of the shape memory alloy member (50) may be arranged between the first side (141A) of the housing (140) and the partition wall (145).

[0090] At this time, the first side (141A) of the partition wall (145) and the housing (140) can serve as a guide part to guide the movement of the shape memory alloy member (50). Additionally, the first side (141A) of the partition wall (145) and the housing (140) can serve to prevent the shape memory alloy member (50) from moving out of the housing (140). The partition wall (145) can serve to prevent other parts of the shape memory alloy member, excluding the part of the shape memory alloy member (50) combined with the bobbin (110), from spatially interfering with or colliding with the bobbin (110), thereby ensuring the reliability of the autofocus operation by the shape memory alloy member (50).

[0091] The partition wall (145) can be connected to the third side (141C) and the fourth side (141D) of the housing (140). For example, one end of the partition wall (145) can be connected to the inner surface of the third side (141C) of the housing (140), and the other end of the partition wall (145) can be connected to the inner surface of the fourth side (141D) of the housing (140).

[0092] The partition wall (145) may include an opening (44) through which the connecting portion (118) of the bobbin (110) passes. For example, at least a portion of the first protrusion (117A) of the bobbin (110) may pass through the opening (44) of the partition wall (145). The size of the opening (44) may be larger than the size of the first protrusion (117A) (or connecting portion (118)) of the bobbin (110). The first protrusion (117A) may pass through the opening (44) of the partition wall (145). The first protrusion (117A) (or connecting portion (118)) may protrude from the first side (125) of the partition wall (145). In this case, the first side (125) of the partition wall (145) may be a surface facing the first side (141A) of the housing (140).

[0093] Referring to FIGS. 5 and 6, the housing (140) may include a guide portion (28) positioned between the first side portion (141A) of the housing (140) and the partition wall (145) to guide the positioning of the shape memory alloy member (50). The guide portion (28) may serve to support the shape memory alloy member (50). The guide portion (28) can disperse the force received by the shape memory alloy member (50) during AF operation, thereby preventing the shape memory alloy member (50) from breaking. The guide portion (28) may protrude from the first side portion (125) of the partition wall (145). The guide portion (28) may be described as a "protrusion" or a "support portion."

[0094] The guide section (28) may include a first guide section (28A) and a second guide section (28B) located on opposite sides of the opening (44) of the partition wall (145). For example, when looking at the first side (141A) (or partition wall (145)) of the housing (140) from the front, the first protrusion (117A) of the bobbin (110) may be positioned between the first guide portion (28A) and the second guide portion. Also, at least a portion of the connecting portion (118) of the bobbin (110) may be positioned between the first guide portion (28A) and the second guide portion (28B). This is to facilitate the connection between a portion of the shape memory alloy member (50) and the connecting portion (118) of the bobbin (110). For example, the connecting portion (118) of the bobbin (110) may overlap with the guide portion (28) in a direction parallel to the first side (141A) (or partition wall (145)). The first guide portion (28A) is the first of the housing (140) adjacent to the first side (141A) of the housing (140). It may be positioned adjacent to or in contact with the corner (CA1). The second guide portion (28B) may be positioned adjacent to or in contact with the second corner (CA2) of the housing (140) adjacent to the first side (141A) of the housing (140). The guide portion (28) may be positioned between at least a portion of the first shape memory alloy member (51) and at least a portion of the second shape memory alloy member (52). The guide portion (28) may separate or isolate the first shape memory alloy member (51) and the second shape memory alloy member (52) from each other.

[0095] Each of the first guide section (28A) and the second guide section (28B) may include a portion in which the length in the optical axis direction gradually decreases from the corner (CA1, CA2) of the housing (140) toward the center or middle portion of the first side (141A) of the housing (140).

[0096] The first guide portion (28A) may include an upper surface (41A) and a lower surface (42A) located opposite each other in the direction of the optical axis. The upper surface (41A) of the first guide portion (28A) may include a first surface (4A) and a second surface (4B) inclined relative to the first surface (4A). The first surface (4A) may be a plane perpendicular to the optical axis. Alternatively, the first surface (4A) may be parallel to the upper surface of the housing (140). The first surface (4A) may be adjacent to the first corner (CA1) of the housing (140), and the second surface (4B) may be an inclined surface inclined downward.

[0097] The lower surface (42A) of the first guide portion (28A) may include a third surface (5A) and a fourth surface (5B) inclined relative to the third surface (5A). The third surface (5A) may be a plane perpendicular to the optical axis. Alternatively, the third surface (5A) may be parallel to the upper surface of the housing (140) or the first surface (4A). The third surface (5A) may be adjacent to the second corner (CA2) of the housing (140), and the fourth surface (5B) may be an inclined surface inclined in the upward direction. The first interior angle between the first surface (4A) and the second surface (4B) and the second interior angle between the third surface (5A) and the fourth surface (5B) may be obtuse angles. For example, the first interior angle and the second interior angle may be the same. In other embodiments, the first interior angle and the second interior angle may be different.

[0098] The second guide portion (28B) may include an upper surface (41B) and a lower surface (42B). The upper surface (41B) may include a first surface (4C) and a second surface (4D), and the lower surface (42B) may include a third surface (5C) and a fourth surface (5D). The description of the upper surface (41A) and lower surface (42A) of the first guide portion (28A) may be applied to or by analogy to the upper surface (41B) and lower surface (41B) of the second guide portion (28B).

[0099] The first side (141A) of the housing (140) may include an opening (46) that exposes the coupling portion (118) of the bobbin (110). The opening (46) may expose at least a portion of the first protrusion (117A). The opening (46) may serve as a passage or window for coupling the anti-detachment portion (80) to the coupling portion (118). The upper part of the opening (46) may be open to the upper surface of the first side (141A) of the housing (140). The opening (46) may expose the anti-detachment portion (80). In another embodiment, the opening (46) may be a hole penetrating the first side (141A) of the housing (140).

[0100] The housing (140) may include a relief portion (45) corresponding to the second protrusion (117B) of the bobbin (110). The relief portion (45) may be formed on the inner surface of the second side (141B) of the housing (140). The relief portion (45) and the second protrusion (117B) of the bobbin (110) can prevent the bobbin (110) from rotating beyond a preset range and can prevent tilting of the optical axis.

[0101] The housing (140) may include at least one first projection (36A) protruding from the upper surface and coupled with at least one hole (37A) of the upper conductive member (60), and at least one second projection (36B) protruding from the lower surface and coupled with at least one hole (37A) of the lower conductive member (70).

[0102] The housing (140) may include a mounting portion (32) for placing or mounting a circuit board (190). The mounting portion (32) may be formed on a side of the housing (140) that corresponds to or opposite to the side of the bobbin (110) on which the sensing magnet (180) is placed. For example, the mounting portion (32) may be formed on at least one of the second and third sides (141B, 141C) of the housing (140). The mounting portion (32) may be a groove that is recessed from the outer surface of the side of the housing (140). The housing (140) may include a coupling projection (33) that engages with a hole (43) of the circuit board (190). The coupling projection (33) may be placed on the bottom surface of the mounting portion (32).

[0103] The housing (140) may include a guide groove (11) for at least another part of the sliding member (25) to be placed therein. The guide groove (11) of the housing (140) may be formed to correspond to or opposite the guide groove (9) of the bobbin (110). The guide groove (11) may be placed in the bulkhead (145) of the housing (140). For example, the guide groove (11) may be a groove that is recessed from the second side (126) of the bulkhead (145). In this case, the second side (126) of the bulkhead (145) may be the opposite side of the first side (125) of the bulkhead (145). The guide groove (11) of the housing (140) may include a first guide groove (11A) and a second guide groove (11B). The first guide groove (11A) may be located adjacent to the first corner (CA1) of the housing (140), and the second guide groove (11B) may be located adjacent to the second corner (CA2) of the housing (140).

[0104] A sliding member (25) may be positioned between the bobbin (110) and the housing (140). The sliding member (25) may be positioned between the first side (110A) of the bobbin (110) and the partition (145) of the housing (140).

[0105] The sliding member (25) may be replaced with a “rolling member” (21), “roller”, “ball member”, “ball”, or “ball bearing”. At least a portion of the sliding member (25) may be in contact with the first side (110A) (e.g., guide groove (9)) of the bobbin (110), and at least another portion of the sliding member (25) may be in contact with the bulkhead (145) (e.g., guide groove (11)) of the housing (140). When the bobbin (110) is moved in the direction of the optical axis, the sliding member (25) may reduce friction between the bobbin (110) and the housing (140). By means of the sliding member (25), the bobbin (110) may be in contact with the sliding member (25) and slide or slide in the direction of the optical axis.

[0106] The sliding member (25) may include a first ball member (25A) disposed between the first guide groove (9A) of the bobbin (110) and the first guide groove (11A) of the housing (140), and a second ball member (25B) disposed between the second guide groove (9B) of the bobbin (110) and the second guide groove (11B) of the housing (140). For example, each of the first and second ball members (25A, 25B) may include at least one ball. For example, each of the first and second ball members (25A, 25B) may include a plurality of balls.

[0107] The second magnetic body (23) may be placed in the housing (140) so as to correspond to, oppose, or overlap with the first magnetic body (15). The first magnetic body (15) and the second magnetic body (23) may be opposed or overlapped in a second direction (e.g., the X-axis direction). The second magnetic body (23) may be placed in the partition wall (145) of the housing (140). For example, the second magnetic body (23) may be placed on the second side (126) of the partition wall (145) of the housing (140). For example, the second magnetic body (23) may be bonded to the second side (126) of the partition wall (145) of the housing (140) by an adhesive.

[0108] The second magnetic body (23) may include a third magnetic unit (23A) and a fourth magnetic unit (23B) disposed between the first side (141A) of the housing (140) and the first side (110A) of the bobbin (110). The third magnetic unit (23A) and the fourth magnetic unit (23B) may be disposed spaced apart from the partition wall (145) of the housing (140). The third magnetic unit (23A) and the fourth magnetic unit (23B) may be attached to or joined to the partition wall (145) of the housing (140) by means of an adhesive. The third magnetic unit (23A) may be disposed to correspond, opposite, or overlap with the first magnetic unit (15A), and the fourth magnetic unit (23B) may be disposed to correspond, opposite, or overlap with the second magnetic unit (15B).

[0109] Each of the first and second magnetic bodies (15, 23) may be made of a material that adheres to a magnet. For example, each of the first and second magnetic bodies (15, 23) may be made of a metal material that adheres to a magnet. Or, for example, each of the first and second magnetic bodies (15, 23) may be made of a magnetic metal material. Each of the first and second magnetic bodies (15, 23) may also be a magnet.

[0110] Either one of the first and second magnetic bodies (15, 23) may be replaced with "magnet," "holding magnet," or preload magnet, and the other one of the first and second magnetic bodies (15, 23) may be replaced with "yoke."

[0111] An attractive force may be applied between the first magnetic body (15) and the second magnetic body (23) in a second direction (e.g., the X-axis direction) or in a direction perpendicular to the outer surface of the first side (141A) of the housing (140). The first magnetic body (15) and the second magnetic body (23) may be arranged so that an attractive force or holding force is applied to each other. For example, each of the first magnetic body (15) and the second magnetic body (23) may be a magnet, and the faces of the first magnetic body (15) and the second magnetic body (23) facing each other may have opposite polarities.

[0112] Due to the attractive force (or holding force) between the first magnetic body (15) and the second magnetic body (23), the bobbin (110) and the housing (140) can press the sliding member (25), and the sliding member (25) can be in close contact with the bobbin (110) and the housing (140). Due to the attractive force acting between the first and second magnetic bodies (15, 23), the sliding member (25) can stably support the bobbin (110) against the housing (140), and stable AF operation can be performed.

[0113] The upper conductive member (60) may be positioned on the upper surface or top of the housing (140). The upper conductive member (60) may be coupled to the upper surface or top of the housing (140). The lower conductive member (70) may be positioned on the lower surface or bottom of the housing (140). The lower conductive member (70) may be coupled to the lower surface or bottom of the housing (140).

[0114] The upper conductive member (60) may include a first conductive member (61) and a second conductive member (62) spaced apart from each other. The lower conductive member (70) may include a third conductive member (71) and a fourth conductive member (72) spaced apart from each other. The upper conductive member (60) and the lower conductive member (70) may include a conductive member or be formed of a conductive member. In another embodiment, the conductive members (60, 70) may be formed integrally with the housing (140) by an insert injection molding process. For example, in another embodiment, the conductive member may be inserted into the housing (140), or a part of the conductive member may be placed inside the housing (140). The conductive member (60) may be referred to as a "terminal member," a "conductive pattern," or a "conductive layer."

[0115] The shape memory alloy member (50) may include a shape memory alloy (SMA). A shape memory alloy is an alloy that returns to its original shape, which is stored at a specific temperature, even if it is deformed into a different shape. The resistance and length of the shape memory alloy member (50) may change depending on whether current is applied or not.

[0116] At a low temperature (e.g., room temperature), the resistance of the shape memory alloy member (50) may have a high resistance value. At this time, the shape memory alloy member (50) may have a first length. When a driving signal (e.g., driving current) is applied to the shape memory alloy member (50), the temperature of the shape memory alloy member (50) rises, and at the driving temperature (e.g., 100°C to 110°C), the length of the shape memory alloy member (50) may decrease. At this time, the shape memory alloy member (50) may have a second length that is smaller than the first length. In this way, the shape memory alloy member (50) may expand or contract by the driving signal, and the AF moving part (e.g., bobbin (110)) coupled to the shape memory alloy member (50) may move in a first direction. By controlling the intensity of the driving signal applied to the shape memory alloy member (50), the degree of expansion or contraction of the shape memory alloy member (50) can be adjusted, and the displacement of the bobbin (110) in the direction of the optical axis can be adjusted, thereby enabling an auto-focusing function.

[0117] The shape memory alloy member (50) can connect the AF moving part (e.g., bobbin (110)) and the fixed part. The first end of the shape memory alloy member (50) can be connected to or fixed to one area (e.g., first corner (CA1)) of the housing (140) which is the fixed part, and the second end of the shape memory alloy member (50) can be connected to or fixed to another area (e.g., second corner (CA2)) of the housing (140). The first end and the second end of the shape memory alloy member (50) can be located opposite each other in the longitudinal direction of the shape memory alloy member (50).

[0118] The middle portion of the shape memory alloy member (50) may be a region of the shape memory alloy member (50) located between the first end and the second end of the shape memory alloy member (50). The middle portion of the shape memory alloy member (50) may be connected to or coupled with the bobbin (110). At least a portion of the middle portion of the shape memory alloy member (50) may be connected to or coupled with the first side (110A) of the bobbin (110). For example, at least a portion of the middle portion of the shape memory alloy member (50) may be connected to or coupled with the coupling portion (118) of the bobbin (110).

[0119] The shape memory alloy member (50) may be formed of a conductive material. The shape memory alloy member (50) may be an electrically conductive member. For example, the shape memory alloy member (50) may be in the form of a wire or a plate. The shape memory alloy member (50) may also be expressed as a "shape memory alloy wire ('SMA wire')".

[0120] The shape memory alloy member (50) may include a first region (51A, 52A) connected to or coupled with a first side (110A) of a bobbin (110), a second region (51B, 52B) connecting a first end of the shape memory alloy member (50) to the first region (51A, 52A), and a third region (51C, 52C) connecting a second end of the shape memory alloy member (50) to the first region (51A, 52A).

[0121] For example, the first region (51A, 52A) may be connected to or coupled with the coupling portion (118) of the bobbin (110). The first region (51A, 52A) may be inserted into the coupling portion (118) of the bobbin (110). The second region (51B, 52B) may be connected to or coupled with the first corner (CA1) of the housing (140). The third region (51C, 52C) may be connected to or coupled with the second corner (CA2) of the housing (140).

[0122] The bobbin (110) may include a groove (22) into which a first region (51A, 52A) of the shape memory alloy member (50) is inserted. The groove (22) may be formed in the first protrusion (117A) of the bobbin (110). The groove (22) may be formed in the coupling portion (118). The groove (22) may be recessed from the outer surface (48) of the first protrusion (117A) of the bobbin (110). The groove (22) may include a bottom surface (22A) having a step with the outer surface (48) of the first protrusion (117A) in a second direction (e.g., x-axis direction) and a side surface (22B) connecting the outer surface (48) of the first protrusion (117A) and the bottom surface (22A). The side (22B) may include a first side (22B1) and a second side (22B2) facing each other in the direction of the optical axis. The first region (51A, 52A) of the shape memory alloy member (50) may be positioned between the first side (22B1) and the second side (22B2) of the groove (22).

[0123] The bobbin (110) may include a receiving groove (49) for receiving or arranging a detachment prevention member (80). The receiving groove (49) may be recessed from the outer surface (48) of the first protrusion (117A). The bottom surface of the receiving groove (49) and the bottom surface (22A) of the groove (22) may have a step difference in a second direction. For example, the outer surface (48) of the first protrusion (117A) may be located closer to the bottom surface of the receiving groove (49) than to the bottom surface (22A) of the groove (22).

[0124] The shape memory alloy member (50) may include a first shape memory alloy member (51) and a second shape memory alloy member (52). One end (or first end) of the first shape memory alloy member (51) may be fixed or connected to the upper, upper surface or top of the first corner (CA1) of the housing (140), and the other end (or second end) of the first shape memory alloy member (51) may be fixed or connected to the upper, upper surface or top of the second corner (CA2) of the housing (140). A first region (51A) of the first shape memory alloy member (51) may be connected to a first protrusion (117A) of the bobbin (110). A first region (51A) of the first shape memory alloy member (51) may be placed within a groove (22) of the first protrusion (117A) of the bobbin (110), inserted into the groove (22), or fitted into the groove (22).

[0125] One end (or first end) of the second shape memory alloy member (52) may be fixed or connected to the lower, bottom, or bottom of the first corner (CA1) of the housing (140), and the other end (or second end) of the second shape memory alloy member (52) may be fixed or connected to the lower, bottom, or bottom of the second corner (CA2) of the housing (140). The first region (52A) of the second shape memory alloy member (52) may be connected to the first protrusion (117A) of the bobbin (110). The first region (52A) of the second shape memory alloy member (52) may be placed within the groove (22) of the first protrusion (117A) of the bobbin (110), inserted into the groove (22), or fitted into the groove (22).

[0126] The first region (51A, 52A) of the shape memory alloy member (50) can be positioned between the first magnetic unit (15A) and the second magnetic unit (15B). Through this positioning, tilting of the bobbin (110) can be prevented during AF driving.

[0127] Referring to FIG. 7, the bobbin (110) may include a partition (29) positioned between the first region (51A) of the first shape memory alloy member (51) and the first region (52A) of the first shape memory alloy member (52), which is positioned in the first protrusion (117A). For example, the partition (29) may protrude from the bottom surface (22A) of the groove (22). The partition (29) may be positioned between the first side (22B1) and the second side (22B2) of the groove (22). The partition (29) may extend in the longitudinal direction of the shape memory alloy members (51, 52). The partition (29) may extend in a third direction. The partition (29) may prevent the first shape memory alloy member (51) and the second shape memory alloy member (52) from coming into contact with each other and may serve to spatially separate the two.

[0128] Additionally, the bobbin (110) may include a first projection (59A) protruding from the first side (22B1) of the groove (22) toward the second side (22B2) and a second projection (59B) protruding from the second side (22B2) of the groove (22) toward the first side (22B1) of the groove (22). Each of the first and second projections (59A, 59B) may be spaced apart from the partition (29). At least a portion of the partition (29) may be located between the first projection (59A) and the second projection (59B). A portion of the first region (51A) of the first shape memory alloy member (51) may be positioned between the first projection (59A) and the partition (29), and a portion of the first region (52A) of the second shape memory alloy member (52) may be positioned between the second projection (59B) and the partition (29).

[0129] When AF is driven, the force received by the first shape memory alloy member (51) can be dispersed by the first protrusion (59A) and the first side (22B1), thereby preventing the first shape memory alloy member (51) from breaking. Additionally, when AF is driven, the force received by the second shape memory alloy member (52) can be dispersed by the second protrusion (59B) and the second side (22B2), thereby preventing the second shape memory alloy member (52) from breaking.

[0130] Referring to FIG. 6, a second region (51B, 52B) of the shape memory alloy member (50) may be placed on the guide portion (28). At least a portion of the second region (51B) of the first shape memory alloy member (51) may be placed on the upper surface (41A) of the first guide portion (28A). At least a portion of the second region (51B) may overlap with the upper surface (41A) of the first guide portion (28A) in the direction of the optical axis. At least a portion of the second region (51B) may overlap with the second surface (4B) of the upper surface (41A) of the first guide portion (28A) in the direction of the optical axis. Additionally, at least a portion of the third region (51C) of the first shape memory alloy member (51) may be placed on the upper surface (41B) of the second guide portion (28B). At least a portion of the third region (51C) may overlap with the upper surface (41B) of the second guide portion (28B) in the direction of the optical axis. At least a portion of the second region (51B) may overlap with the second surface (4D) of the upper surface (41B) of the second guide portion (28B) in the direction of the optical axis.

[0131] At least a portion of the second region (52B) of the second shape memory alloy member (52) may be positioned below the lower surface (42A) of the first guide member (28A). At least a portion of the second region (51B) may overlap with the lower surface (42A) of the first guide member (28A) in the direction of the optical axis. At least a portion of the second region (51B) may overlap with the fourth surface (5B) of the lower surface (42A) of the first guide member (28A) in the direction of the optical axis. Additionally, at least a portion of the third region (52C) ​​of the second shape memory alloy member (52) may be positioned below the lower surface (42B) of the second guide member (28B). At least a portion of the third region (51C) may overlap with the lower surface (42B) of the second guide member (28B) in the direction of the optical axis. At least a portion of the second region (51B) may overlap with the fourth surface (5D) of the lower surface (42B) of the second guide portion (28B) in the direction of the optical axis.

[0132] The lens driving device (100) may include a detachment prevention part (80) that is positioned on the bobbin (110) and covers at least a portion of the shape memory alloy member (50). The detachment prevention part (80) may be positioned on the coupling part (118) of the bobbin (110) and may cover at least a portion of the first region (51A, 52A) of the shape memory alloy member (50). The detachment prevention part (80) may serve to prevent the shape memory alloy member (50) from detaching from the bobbin (110).

[0133] The anti-detachment part (80) may be positioned on the outside of the shape memory alloy member (50) so as not to affect the shrinkage or expansion of the shape memory alloy member (50). The anti-detachment part (80) may be positioned on the outside of the first region (51A, 52A) of the shape memory alloy member (50).

[0134] The anti-detachment part (80) may be placed on the first protrusion (117A) of the bobbin (110). The anti-detachment part (80) may be placed within the receiving groove (49) of the bobbin (110). The anti-detachment part (80) may be T-shaped, but in other embodiments, the anti-detachment part may have a polygonal or circular shape and may be modified into various shapes.

[0135] In FIG. 6, the number of anti-detachment members (80) is one, but in other embodiments, the anti-detachment members may include a plurality of anti-detachment units spaced apart from each other. At least a portion of the first region (51A, 52A) of the shape memory alloy member (50) may overlap with the anti-detachment member (80) in the second direction. At least a portion of the anti-detachment member (80) may be placed on the partition wall (29). Additionally, another portion of the anti-detachment member (80) may be placed on at least one of the protrusions (59A, 59B).

[0136] In order to supply a driving signal to the shape memory alloy member (50), the shape memory alloy member (50) may be electrically connected to the conductive member (60, 70). The shape memory alloy member (50) and the conductive member (60, 70) may be joined to each other through a clamp connection or by a conductive adhesive.

[0137] One end (or first end) of the first shape memory alloy member (51) may be coupled to the first conductive member (61). The other end (or second end) of the first shape memory alloy member (51) may be coupled to the second conductive member (62). One end (or first end) of the second shape memory alloy member (52) may be coupled to the third conductive member (71). The other end (or second end) of the second shape memory alloy member (52) may be coupled to the fourth conductive member (72). One end (or first end) of the first shape memory alloy member (51) may be electrically connected to the first conductive member (61). The other end (or second end) of the first shape memory alloy member (51) may be electrically connected to the second conductive member (62). One end (or first end) of the second shape memory alloy member (52) may be electrically connected to the third conductive member (71). The other end (or second end) of the second shape memory alloy member (52) may be electrically connected to the fourth conductive member (72).

[0138] A first driving signal may be supplied to the first shape memory alloy member (51) through the first and second current-carrying members (61, 62). A second driving signal may be supplied to the second shape memory alloy member (52) through the third and fourth current-carrying members (71, 72). The first shape memory alloy member (51) may contract or expand by the first driving signal, and the second shape memory alloy member (52) may contract or expand by the second driving signal. Due to the expansion and contraction of the first and second shape memory alloy members (51, 52), the AF moving part (e.g., bobbin (110)) may move in a first direction, e.g., an upward direction (+Z-axis direction) or a downward direction (-Z-axis direction).

[0139] In the embodiment of FIG. 1, two SMA wires are provided for AF driving, but in other embodiments, AF operation may be performed using a single SMA wire. For example, in other embodiments, either the first shape memory alloy member (51) and the second shape memory alloy member (52) of FIG. 1 may be omitted.

[0140] The position sensor (170) may be placed in a fixed part. The position sensor (170) may be placed in a housing (140). The position sensor (170) may be coupled to the housing (140) or fixed to the housing (140). The position sensor (170) can detect displacement or position in the direction of the optical axis of the bobbin (110). The position sensor (170) may correspond to or face the sensing magnet (180) in a direction perpendicular to the direction of the optical axis (e.g., the Y-axis direction). The position sensor (170) can detect the strength of the magnetic field of the sensing magnet (180). The position sensor (170) can output an output signal based on the result of detecting the magnetic field of the sensing magnet (180).

[0141] At the initial position of the AF moving part (e.g., bobbin (110)), at least a portion of the position sensor (170) may overlap with the sensing magnet (180) in a direction parallel to a straight line perpendicular to the optical axis and passing through the optical axis. In other embodiments, the two may not overlap each other.

[0142] The position sensor (170) may be implemented as a Hall sensor alone. If the position sensor (170) is a Hall sensor, the position sensor (170) may include two input terminals into which a driving signal is input and two output terminals into which an output signal is output. The two input terminals and two output terminals of the position sensor (170) may be electrically connected to a circuit board (190). A driving signal may be supplied to the position sensor (170) through the circuit board (190), and the output signal of the position sensor (170) may be transmitted through the circuit board (190) to a control unit (not shown) of a camera device (200) or a control unit (780) of an optical device (200A). The control unit (780) of the camera device (200) or the control unit (780) of the optical device (200A) can control the movement of the bobbin (110) in the direction of the optical axis or control the driving signal supplied to the shape memory alloy member (50) based on the output signal output by the position sensor (170).

[0143] Alternatively, in another embodiment, the position sensor (170) may be implemented in the form of a driver IC including a Hall sensor. When the position sensor (170) is a driver IC, the position sensor (170) may receive a power signal and transmit and receive a clock signal and a data signal using data communication using a protocol, such as I2C communication. In this case, the position sensor (170) may include first and second terminals for receiving a power signal, a third terminal for transmitting and receiving a clock signal, and a fourth terminal for transmitting and receiving a data signal. When the position sensor (170) is a driver IC, the position sensor (170) may supply a driving signal to the shape memory alloy member (50). At this time, the driver IC type position sensor (170) can be electrically connected to the conductive members (60, 70), and can supply a first driving signal to the first shape memory alloy member (51) through the first and second conductive members (61, 62), and can supply a second driving signal to the second shape memory alloy member (52) through the third and fourth conductive members (71, 72).

[0144] A circuit board (190) may be placed in a housing (140). A circuit board (190) may be coupled to a housing (140). A circuit board (190) may be placed on at least one of the second to fourth sides (141B to 141D) of the housing (140). A circuit board (190) may be placed on a seating portion (32) of the housing (140).

[0145] Referring to FIG. 5, the circuit board (190) may include pads (P1 to P4) that are electrically connected to a conductive member (60, 70). The conductive member (60, 70) and the pads (P1 to P4) may be electrically connected by solder or a conductive adhesive.

[0146] For example, the circuit board (190) may include a first pad (P1) electrically connected to a first conductive member (61), a second pad (P2) electrically connected to a second conductive member (62), a third pad (P3) electrically connected to a third conductive member (71), and a fourth pad (P4) electrically connected to a fourth conductive member (72). The first and second pads (P1, P2) may be placed on the upper or top of the circuit board (190), and the third and fourth pads (P3, P4) may be placed on the lower or bottom of the circuit board (190).

[0147] The circuit board (190) may be a printed circuit board or an FPCB. Referring to FIGS. 3 and 4b, the circuit board (190) may include a first board (191) disposed on a third side (141C) of the housing (140), a second board (192) disposed on a second side (141B) of the housing (140), and a third board (193) connecting the first board (191) and the second board (192).

[0148] The position sensor (170) may be placed on or mounted on the circuit board (190). The position sensor (170) may be placed on the first board (191). The first board (191) may include pads (P1 to P4). The circuit board (190) may include a plurality of terminals (195) electrically connected to the pads (P1 to P4). Referring to FIG. 3, for example, the first board (191) may include a first part (3A) placed on the outer surface of the housing (140), a second part (3B) placed on the inner surface of the housing (140), and a third part (3C) connecting the first part (3A) and the second part (3B) and placed on the upper surface of the housing (140). Pads (P1 to P4) may be placed in the first part (3A), and a position sensor (170) may be placed in the second part (3B). In another embodiment, the second part (3B) and the third part (3C) of the first substrate (191) may be omitted, the position sensor (170) may be placed in the first substrate (191), and the side (141C) of the housing (140) may include a receiving groove or receiving hole for receiving the position sensor (170).

[0149] The second substrate (192) may include a plurality of terminals (195). The plurality of terminals (195) of the circuit board (190) may be for electrical connection with the outside. For example, the upper part of the second substrate (192) may be coupled to the second side (141B) of the housing (140), and the lower part of the second substrate (192) may be coupled to the base (210). The terminals (195) may be disposed on the lower part of the second substrate (192). The first substrate (191), the upper part of the second substrate (192), and the third substrate (193) may be coupled to the housing (140), which is the OIS moving part, and the lower part of the second substrate (192) may be coupled to the base (210), which is the OIS fixed part. Since the circuit board (190) may be a flexible board, the upper portions of the first board (191), the second board (192), and the third board (193) may move together with the OIS moving part when driving the OIS.

[0150] The movable frame (160) may be positioned below the housing (140). The movable frame (160) may be joined to the housing (140). For example, the upper, upper surface, or top of the movable frame (160) may be joined to the lower, lower surface, or bottom of the housing (140) by means of an adhesive. The movable frame (160) may have a shape corresponding to the housing (140) and may include an opening (301) that corresponds to, opposes, or overlaps the opening (101) of the bobbin (110) and / or the opening (201) of the housing (1400). The opening (301) may penetrate the movable frame (160) in the direction of the optical axis.

[0151] Referring to FIG. 4a, the movable frame (160) may include first to fourth sides (162A to 162D) corresponding to first to fourth sides (141A to 141D) of the housing (140). Additionally, the movable frame (160) may include corners (DA1, DA2) corresponding to corners (CA1, CA2) of the housing (140). Additionally, the movable frame (160) may include a corner (DA3) located opposite to corner (DA1) and a corner (DA4) located opposite to corner (DA2).

[0152] The movable frame (160) may include a receiving groove (161) for receiving an OIS sensing magnet (34). The receiving groove (161) may be formed on the lower surface of the movable frame (160). In another embodiment, the receiving groove may be formed on the upper surface of the movable frame (160). The receiving groove (161) may include a first receiving groove (161A) for receiving a first sensor magnet (34A) and a second receiving groove (161B) for receiving a second sensor magnet (34B) and a first receiving groove for receiving a first sensor magnet (34A) and a second receiving groove for receiving a second sensor magnet (34B) and a second receiving groove for receiving a second sensor magnet (34B) and a second receiving groove. In another embodiment, the first receiving groove may be formed on one of two adjacent sides of the frame, and the second receiving groove may be formed on the other of the two adjacent sides of the frame.

[0153] The lens driving device (100) may include at least one moving support member (16) positioned between the OIS moving member and the fixed member to support the OIS moving member. The OIS moving member may move in a direction perpendicular to the optical axis direction by means of a shape memory alloy member (270). The moving support member (16) may reduce friction between the OIS moving member and the fixed member when the OIS moving member moves, and may serve to guide the OIS moving member to move smoothly in a direction perpendicular to the optical axis direction. For example, an auto-focusing member (10) may be included in the OIS moving member. The above-described bobbin (110), housing (140), anti-detachment member (80), and moving frame (160) may be formed from injection molded materials, such as plastic or resin.

[0154] The movable support member (16) may be positioned between the movable frame (160) and the base (210). The movable support member (16) may be in the form of a protrusion formed on the movable frame (160). For example, the movable support member (16) may include a plurality of protrusions protruding from the lower, bottom, or bottom of the movable frame (160). The movable support member (16) may be referred to as a "protrusion." For example, the movable support member (16) may include a plurality of protrusions (16A to 16D) spaced apart from each other. In FIG. 4b, the number of protrusions is four, but in other embodiments, the number of protrusions may be two or three, and in yet another embodiment, five or more.

[0155] A plurality of protrusions (16A to 16D) may be positioned adjacent to any one of the corresponding corners of the movable frame (160). For example, each of the plurality of protrusions (16A to 16D) may be positioned between any one of the corresponding corners of the movable frame (160) and the opening (301) of the movable frame (160).

[0156] The movable support member (16) may be placed on the base (210) and may come into contact with the base (210). That is, the movable support member (16) may be supported by the base (210). For example, the base (210) may include a protrusion (216) that corresponds to, opposes, or overlaps with the movable support member (16) in the direction of the optical axis. The movable support member (16) may come into contact with the protrusion (216) of the base (210). In another embodiment, the movable support member may be placed adjacent to the side of the movable frame (160). For example, in another embodiment, the movable support member may be placed adjacent to the center of each of the four side (or sides) of the movable frame (160).

[0157] A damper (not shown) may be disposed on the protrusion (216) of the movable support member (16) and the base (210). The damper may come into contact with the protrusion (216) of the movable support member (16) and the base (210), and may absorb vibrations of the OIS movable member during OIS operation and prevent oscillation of the OIS movable member. Additionally, a lubricant, such as grease, may be disposed between the movable frame (160) and the movable support member (16), and the lubricant may reduce friction between the movable support member (16) and the base (210). The movable frame (160) may include a groove (47) formed around the movable support member (16) to accommodate the damper or lubricant.

[0158] In another embodiment, the movable support member (16) may not be in the form of a protrusion, but may be a sliding member, such as a ball member or in the form of a ball, disposed between the OIS fixed member (e.g., base (210)) and the OIS movable member (e.g., movable frame (160)). For example, in another embodiment, a plurality of protrusions (16A to 16D) may be omitted, and a plurality of ball members may be disposed between the lower surface of the movable frame (160) and the upper surface of the base (210) (or the upper surface of the protrusion (216)).

[0159] The movable frame (160) may include a coupling portion (65) for coupling with an elastic member (150). The coupling portion (65) may be positioned on the lower, underside, or bottom of the movable frame (160). The coupling portion (65) may be positioned adjacent to the movable support portion (16). The coupling portion (65) may protrude from the underside of the movable frame (160).

[0160] The coupling portion (64) may include a plurality of coupling portions (65A to 65D) corresponding to a plurality of elastic units (151 to 154). Each of the plurality of coupling portions (65A to 65D) may be coupled to any one of the corresponding elastic units (151 to 154).

[0161] The movable frame (160) may include at least one projection (66) for supporting at least a portion of the shape memory alloy member (270). The projection (66) may protrude from the lower surface of the movable frame (160). The projection (66) may be positioned adjacent to the opening (301) of the movable frame (160). For example, the projection (66) may be positioned adjacent to or in contact with the inner surface (163) of the movable frame (160).

[0162] The movable frame (160) may include a plurality of protrusions (66A to 66D) corresponding to a plurality of elastic units (151 to 154) or a plurality of shape memory alloy members (271 to 274). Although the number of each of the elastic member (150), the shape memory alloy member (270), and the protrusion (66) is exemplified as 4, in other embodiments, the number of each of the elastic member (150), the shape memory alloy member (270), and the protrusion (66) may be 2, 3, or 5 or more.

[0163] The projection (66) of the movable frame (160) may be spaced apart from the coupling portion (65), and a space may exist between the projection (66) and the coupling portion (65) in which a part (38A) of the shape memory alloy member (270) is disposed. For example, a portion of the shape memory alloy member (270) may be disposed between the projection (66) of the movable frame (160) and the coupling portion (65).

[0164] The projection (66) may include a groove (63) for positioning or coupling at least a portion of the anti-detachment member (511). The groove (63) may be recessed from the lower surface of the projection (66). The projection (66) may include a plurality of sides. The groove (63) may include an opening (55) formed on a first side among the sides of the projection (66). The first side of the projection (66) may be a surface facing the coupling portion (65), a portion of the shape memory alloy member (270), or at least a portion of the anti-detachment member (55). The groove (63) may improve the coupling force with the anti-detachment member (511) and prevent the anti-detachment member (511) from detaching from the projection (66).

[0165] In another embodiment, a groove or hole may be formed on the lower surface of the protrusion (66) for a portion or an intermediate portion of the shape memory alloy member (270) to be placed therein.

[0166] FIG. 8 is a perspective view of the OIS unit (20), FIG. 9 is a first exploded view of the OIS unit (20), FIG. 10 is a second exploded view of the OIS unit (20), FIG. 11 is a bottom view of the lens driving device (100) with the cover member (300), base (210) and circuit board (250) removed, FIG. 12 is a partial enlarged view of the lens driving device (100), FIG. 13 is a bottom view of the lens driving device (100) with the cover member (300) and base (210) removed, FIG. 14 is a cross-sectional view of the lens driving device (100) in the AB direction of FIG. 2, FIG. 15 is a cross-sectional view of the lens driving device (100) in the CD direction of FIG. 11, and FIG. 16 is a cross-sectional view of the lens driving device (100) in the EF direction of FIG. 11.

[0167] Referring to FIGS. 8 to 16, the OIS unit (20) may include an OIS fixed part, an OIS moving part, and a shape memory alloy member (270) that connects the OIS fixed part and the OIS moving part and moves the OIS moving part in a direction perpendicular to the optical axis direction. Additionally, the OIS unit (20) may include an elastic member (150) that connects the OIS fixed part and the OIS moving part and supports the OIS moving part with respect to the OIS fixed part.

[0168] The OIS fixed part may be a fixed element or configuration that does not move in a direction perpendicular to the optical axis together with the OIS moving part. Additionally, the OIS fixed part may not move in the optical axis direction. The OIS fixed part may include a base (210), a circuit board (250), and a support frame (260). Additionally, the OIS fixed part may further include a configuration that combines with each of the base (210), the circuit board (250), and the support frame (260).

[0169] The OIS moving part may be an element or component that moves in a direction perpendicular to the optical axis direction relative to the OIS fixed part. The OIS moving part may include an auto-focusing part (10). In another embodiment, the OIS moving part may include a lens module (400).

[0170] The OIS unit (20) may include a support frame (260) positioned below the movable frame (160), a first end (or first end) coupled to one area of ​​the support frame (260), a second end (or second end) coupled to another area of ​​the support frame (260), and a shape memory alloy member (270) including a first area located between the first end and the second end and connected to the OIS movable part.

[0171] The OIS unit (20) may include an elastic member (150) that is coupled to an OIS fixed part (e.g., a support frame (260)) and an OIS moving part (e.g., a moving frame (160)) and elastically supports the OIS moving part. The OIS unit (20) may include an anti-detachment part (511) that is coupled to an OIS moving part (e.g., a moving frame (160)) and covers at least a portion (38A, see FIG. 12) of the middle part of a shape memory alloy member (270).

[0172] The support frame (260) may be spaced apart from the OIS moving part. The support frame (260) may be spaced apart from the moving frame (160). The support frame (260) may be placed below the moving frame (160). The moving frame (160) may be replaced with "AF base" or "frame," and the support frame (260) may be replaced with "support mold" or "fixed frame." The moving frame (160) may be represented as either the first frame or the second frame, and the support frame (260) may be represented as either the first frame or the second frame.

[0173] Referring to FIG. 9, the support frame (260) may include first to fourth sides (411 to 414) corresponding to first to fourth sides (141A to 141D) of the housing (140) or first to fourth sides (162A to 162D) of the movable frame (160). For example, the first side (411) and the second side (412) may be located opposite each other in the second direction, and the third side (413) and the fourth side (414) may be positioned between the first side (411) and the second side (412) and opposite each other in the third direction. Additionally, the support frame (260) may include corners (PA1 to PA4) corresponding to corners (DA1 to DA4) of the movable frame (160).

[0174] The support frame (260) may include an opening (401) corresponding to the opening (201) of the housing (140) or the opening (301) of the movable frame (160). The opening (401) may penetrate the support frame (260) in the direction of the optical axis.

[0175] The shape memory alloy member (270) may include a shape memory alloy (SMA). The description of the shape memory alloy member (50) may be applied to or by analogy to the shape memory alloy member (270).

[0176] The shape memory alloy member (270) may include a first end that is coupled to one area of ​​the support frame (260), a second end that is coupled to another area of ​​the support frame (260), and a first area (38A, see FIG. 12) that is connected to or coupled to the movable frame (160). The shape memory alloy member (270) may move the movable frame (160) in a direction perpendicular to the optical axis direction. The shape memory alloy member (270) may include a second area (38B) connecting the first area (38A) and the first end, and a third area (38C) connecting the first area (38A) and the second end.

[0177] The first end of the shape memory alloy member (270) may be connected to or fixed to either of two adjacent sides of the support frame (260), and the second end of the shape memory alloy member (270) may be connected to or fixed to the other of the two adjacent sides of the support frame (260). The first end and the second end of the shape memory alloy member (270) may be located opposite each other in the longitudinal direction of the shape memory alloy member (270).

[0178] The shape memory alloy member (270) can be joined to the support frame (260) by means of a joining member, such as a clamp (2A to 2H). The joining member (2A to 2H) can be joined to the upper surface of the support frame (260). For example, the joining member (2A to 2H) can be joined to the shape memory alloy member (270), and the support frame (260) may include a projection (22A) that is joined to a hole formed in the joining member (2A to 2H). In another embodiment, the shape memory alloy member (270) may be joined to or fixed to the frame (260) by means of a conductive adhesive or solder, etc.

[0179] The shape memory alloy member (270) may include a plurality of shape memory alloy members. For example, the shape memory alloy member (270) may include first to fourth shape memory alloy members (271 to 274).

[0180] The first shape memory alloy member (271) can connect the first side (411) and the fourth side (414) of the support frame (260). The second shape memory alloy member (272) can connect the first side (411) and the third side (413) of the support frame (260). The third shape memory alloy member (273) can connect the second side (412) and the third side (413) of the support frame (260). The fourth shape memory alloy member (274) can connect the second side (412) and the fourth side (414) of the support frame (260). Each of the first to fourth shape memory alloy members (271 to 274) may include the first region (38A) described above. Additionally, each of the first to fourth shape memory alloy members (271 to 274) may include the second region (38B) and third region (38C) described above.

[0181] For example, the first end of the first shape memory alloy member (271) may be connected to the middle area of ​​the first side (411) of the support frame (260), and the second end of the first shape memory alloy member (271) may be connected to the middle area of ​​the fourth side (414) of the support frame (260). For example, the first end of the second shape memory alloy member (272) may be connected to the middle area of ​​the first side (411) of the support frame (260), and the second end of the second shape memory alloy member (272) may be connected to the middle area of ​​the third side (413) of the support frame (260). For example, the first end of the third shape memory alloy member (273) may be connected to the middle area of ​​the second side (412) of the support frame (260), and the second end of the third shape memory alloy member (273) may be connected to the middle area of ​​the third side (413) of the support frame (260). For example, the first end of the fourth shape memory alloy member (274) may be connected to the middle area of ​​the second side (412) of the support frame (260), and the second end of the fourth shape memory alloy member (274) may be connected to the middle area of ​​the fourth side (414) of the support frame (260).

[0182] Referring to FIGS. 4a, FIGS. 9, FIGS. 11, and FIGS. 12, the first regions (38A) of the first to fourth shape memory alloy members (271 to 274) may be arranged to be located opposite each other in the diagonal direction of the movable frame (160).

[0183] For example, the first region (38A) of the first shape memory alloy member (271) and the first region (38A) of the third shape memory alloy member (273) may be located opposite each other in the first diagonal direction. For example, the first region (38A) of the second shape memory alloy member (272) and the first region (38A) of the fourth shape memory alloy member (274) may be located opposite each other in the second diagonal direction.

[0184] The first diagonal direction and the second diagonal direction may intersect each other. For example, the first diagonal direction and the second diagonal direction may be perpendicular to each other. For example, the first diagonal direction may be a direction from the first corner (DA1) of the movable frame (160) toward the third corner (DA3), and the second diagonal direction may be a direction from the second corner (DA2) of the movable frame (160) toward the fourth corner (DA4). Or, for example, the first diagonal direction may be a direction from the first corner (PA1) of the support frame (260) toward the third corner (PA3), and the second diagonal direction may be a direction from the second corner (PA2) of the support frame (260) toward the fourth corner (PA4). Also, the protrusions (66A to 66D) of the movable frame (160) may be arranged to be located on opposite sides of each other in the diagonal direction of the movable frame (160).

[0185] The first region (38A) of the shape memory alloy member (270) may be connected to or coupled with the movable frame (160). The first region (38A) may be a portion of the middle part of the shape memory alloy member (50) located between the first end and the second end of the shape memory alloy member (270). The first region (38A) of the shape memory alloy member (270) may be positioned between the coupling part (65) of the movable frame (160) and the projection (66) of the movable frame (160).

[0186] The shape memory alloy member (270) may be formed of a conductive material. The shape memory alloy member (270) may be an electrically conductive member. For example, the shape memory alloy member (270) may be in the form of a wire or a plate. The shape memory alloy member (270) may also be referred to as a "shape memory alloy wire ('SMA wire')".

[0187] The anti-detachment part (511) may be positioned below the first region (38A) of the shape memory alloy member (270). The anti-detachment part (511) may overlap with the first region (38A) of the shape memory alloy member (270) in the direction of the optical axis. The anti-detachment part (511) may cover the first region (38A) of the shape memory alloy member (270). For example, the anti-detachment part (511) may cover a region of the shape memory alloy member (270) located between the coupling part (65) of the movable frame (160) and the movable support part (16).

[0188] For example, the anti-detachment portion (511) may overlap in the optical axis direction with the first region (38A) of the shape memory alloy member (270) located between the coupling portion (65) and the movable support portion (16) of the movable frame (160). Additionally, the first region (38A) of the shape memory alloy member (270) may overlap with the coupling portion (65) and the movable support portion (16) of the movable frame (160) in a direction perpendicular to the optical axis direction. The coupling portion (65) and the movable support portion (16) of the movable frame (160) may act as a stopper for the shape memory alloy member (270) to catch during OIS operation. Furthermore, the coupling portion (65) and the movable support portion (16) of the movable frame (160) may be parts of the OSI moving portion that receive force from the shape memory alloy member (270) during OIS operation.

[0189] The anti-detachment member (511) can serve to prevent the shape memory alloy member (270) from detaching from the moving frame (160) during OIS operation. The anti-detachment member (511) may be positioned below the shape memory alloy member (270) so as not to affect the movement of the OIS moving part due to the contraction or expansion of the shape memory alloy member (270). The anti-detachment member (511) may include an insulating member that blocks the electrical connection with the shape memory alloy member (270). The anti-detachment member (511) may be coated with an insulating material.

[0190] The OIS unit (20) may include a detachment prevention member (511) corresponding to the shape memory alloy members (271 to 274). For example, the OIS unit (20) may include four detachment prevention members (511A to 511D).

[0191] The elastic member (150) may include a first coupling part (510) coupled to the movable frame (160), a second coupling part (520) coupled to the support frame (260), and a connecting part (530) connecting the first coupling part (510) and the second coupling part (520). The first coupling part (510) may be coupled to the coupling part (65) of the movable frame (160). For example, the first coupling part (510) may include a hole for coupling to the coupling projection (77) of the coupling part (65) of the movable frame (160). The first coupling part (510) may be coupled to the lower surface of the coupling part (65) of the movable frame (160) adjacent to the corner of the movable frame (160).

[0192] The second coupling part (520) can be coupled to the side portions (411 to 414) of the support frame (260). For example, the second coupling part (520) can be coupled to the lower surface of the side portions (411 to 414) of the support frame (260). For example, the second coupling part (520) may include a hole (521), and the support frame (260) may include a coupling projection (263) that protrudes from the lower surface of the side portions (411 to 414) and is coupled to the hole (521) of the second coupling part (520).

[0193] The elastic member (150) may include a plurality of elastic units (151 to 154). Each of the plurality of elastic units (151 to 154) may include a first coupling part (510), a second coupling part (520), and a connecting part (530).

[0194] The connecting portion (530) may be formed to be bent or curved (or curved) at least once. Referring to FIG. 12, the width (W1) of the connecting portion (530) may be smaller than the width (W2) of the first connecting portion (510) and the width (W3) of the second connecting portion (520). Through positional changes and micro-deformations of the connecting portion (530), the OIS moving portion may be supported so as to be moved in a direction perpendicular to the optical axis direction. Additionally, the width (W4) of the anti-detachment portion (511) may be smaller than the width (W2) of the first connecting portion (510).

[0195] The width (W4) of the anti-detachment part (511) may be smaller than the width (W3) of the second coupling part (520). The width (W4) of the anti-detachment part (511) may be smaller than the width (W1) of the connecting part (530). This is to reliably prevent the first region (38A) of the shape memory alloy member (270) from detaching from the moving frame (160) while elastically supporting the OIS moving part.

[0196] The anti-detachment member (511) may be connected to the elastic member (150). The anti-detachment member (511) may be directly connected to or directly coupled to the first coupling member (510) of the elastic member (150). For example, the anti-detachment member (511) may extend from the first coupling member (510). For example, the anti-detachment member (511) may include a portion that is bent from the first coupling member (510).

[0197] At least a portion of the anti-detachment portion (511) may be joined to the projection (66) of the movable frame (160). At least a portion of the anti-detachment portion (511) may be joined to the projection (66) of the movable frame (160) by an adhesive. At least a portion of the anti-detachment portion (511) may be placed within the groove (63) of the projection (66) of the movable frame (160) by an adhesive. At least a portion of the anti-detachment portion (511) may be joined to the groove (63) of the projection (66) of the movable frame (160) by an adhesive. The anti-detachment portion (511) may be formed integrally with the elastic member (150), and the anti-detachment portion (511) may be insulated with an insulating material. In another embodiment, the anti-detachment portion (511) may be formed from an insulating material. The width of the anti-detachment portion (511) may be smaller than the width of the first joining portion (510).

[0198] The anti-detachment member (511) may include a plurality of anti-detachment units (511A to 511D) corresponding to shape memory alloy members (271 to 274). Each of the plurality of anti-detachment units (511A to 511D) may be connected to a corresponding first coupling member (510) among the plurality of elastic units (151 to 154). Each of the plurality of anti-detachment units (511A to 511D) may overlap in the optical axis direction with a corresponding first region (38A) among the first to fourth shape memory alloy members (271 to 274). The plurality of anti-detachment units (511A to 511D) may be arranged to be located opposite each other in the diagonal direction of the movable frame (160). For example, the first anti-detachment unit (511A) and the third anti-detachment unit (511C) may be located opposite each other in the first diagonal direction. For example, the second anti-detachment unit (511B) and the fourth anti-detachment unit (511D) may be located opposite each other in the second diagonal direction.

[0199] At least a portion of the first connecting portion (510) of the elastic member (150) and at least a portion of the anti-detachment portion (511) may be positioned between the corner (DA1 to DA4) of the movable frame (160) and the opening (301) of the movable frame (160).

[0200] The OIS unit (20) may include a conductive member (75) that is placed on or coupled to a support frame (260) and electrically connected to a shape memory alloy member (270). The conductive member (75) may be formed integrally with the support frame (260) by an insert injection process. For example, the conductive member (75) may be inserted into the support frame (260), and a portion of the conductive member (75) may be placed inside the support frame (260). The conductive member (75) may be referred to as a "terminal member," a "conductive pattern," or a "conductive layer."

[0201] The conductive member (75) may include a plurality of conductive members (75A to 75H) spaced apart from each other. A first end of each of the shape memory alloy members (271 to 274) may be electrically connected to any one of the plurality of conductive members (75A to 75H), and a second end of each of the shape memory alloy members (271 to 274) may be electrically connected to any other of the plurality of conductive members (75A to 75H). For example, each of the plurality of conductive members (75A to 75H) may be electrically connected to a corresponding one of the bonding members (2A to 2H) by means of a conductive adhesive or solder.

[0202] The OIS unit (20) may include a circuit board (250) electrically connected to a shape memory alloy member. The circuit board (250) may be placed under a support frame (260). The circuit board (250) may be placed on a base (210). The circuit board (250) may be placed between the support frame (260) and the base (210). Shape memory alloy members (271 to 274) may be electrically connected to the circuit board (250). For example, the circuit board (250) may be electrically connected to a conductive member (75). Referring to FIG. 13, each of the plurality of conductive members (75A to 75H) may include a portion electrically connected to the circuit board (250). For example, at least a portion of each of the plurality of conductive members (75A to 75H) may pass through the circuit board (250), be bonded to the lower surface of the circuit board (250) by means of a conductive adhesive or solder, and be electrically connected to the circuit board (250).

[0203] The circuit board (250) can be coupled with at least one of the support frame (260) and the base (210). The circuit board (250) may include a hole (255) that is coupled with a coupling projection (264) of the support frame (260). The coupling projection (264) of the support frame (260) may be formed on the lower surface of the support frame (260).

[0204] The circuit board (250) may include an opening (501) corresponding to the opening (101) of the bobbin (110), the opening (201) of the housing (140), or the opening (601) of the base (210). The circuit board (250) may include a body (250A) and at least one terminal surface (253) that is bent from the body (250A) and disposed on the base (210). The terminal surface (253) may be referred to as a "bent portion" or a "terminal portion." The body (250A) may be disposed between the support frame (260) and the base (210). The body (250A) may be disposed on the upper surface of the base (210). The opening (501) may penetrate the body (250A). The body (250A) can be combined with at least one of the support frame (260) and the base (210).

[0205] For example, the circuit board (250) may include a first terminal surface (253A) connected to one of two sides located opposite each other of the body (250A), and a second terminal surface (253B) connected to the other of the two sides located opposite each other of the body (250A). In another embodiment, the surface on which the terminal surface is formed may be two adjacent sides of the body (250A). The circuit board (250) may include a plurality of terminals (251) disposed on the terminal surface (253). The terminals (251) may be electrically connected to conductive members (75A to 75H). Additionally, the terminals (251) may be electrically connected to a position sensor (240).

[0206] The circuit board (250) may include a relief portion (254) formed at a position corresponding to the movable support portion (16) of the movable frame (160) or the protrusion (216) of the base (210). The relief portion (254) may be intended to avoid spatial interference between the movable support portion (16) of the movable frame (160) and the circuit board (250) or spatial interference between the protrusion (216) of the base (210) and the circuit board (250). For example, the relief portion (254) may be a hole penetrating the circuit board (250). In another embodiment, the relief portion (254) may be in the form of a relief groove. The relief portion (254) may overlap with the movable support portion (16) of the frame (150) or the protrusion (216) of the base (210) in the direction of the optical axis. For example, a protrusion (216) of the base (210) may pass through a relief portion (254) of the circuit board (250). At least a portion of the movable support (16) may come into contact with the protrusion (216) of the base (210) that has passed through the circuit board (250).

[0207] The OIS unit (20) may include a base (210) for supporting the OIS moving part. The base (210) may be placed under the circuit board (250). The base (210) may be placed under the support frame (260). The base (210) may include an opening (601) corresponding to the opening (101) of the bobbin (110) or the opening (501) of the circuit board (250).

[0208] The base (210) may include a protrusion (216) that corresponds to, opposes, or overlaps with the movable support (16) of the movable frame (160) in the direction of the optical axis. For example, the base (210) may include protrusions (216A to 216D) corresponding to a plurality of projections (16A to 16D).

[0209] The protrusion (216) may protrude from the upper surface of the base (210). For example, at least a portion of the protrusion (216) may pass through the relief portion (254) of the circuit board (250). The movable support portion (16) of the movable frame (160) may come into contact with the upper surface of the protrusion (216) of the base (210) that passes through the relief portion (254) of the circuit board (260). The upper surface of the protrusion (216) of the base (210) may be positioned higher than the upper surface of the circuit board (260).

[0210] The base (210) may include a support portion (255) formed in an area facing the terminal surface (253) of the circuit board (250). The support portion (255) may be in the form of a groove that is recessed from the outer surface of the base (210) and may support the terminal surface (253). Terminals (251) may be disposed within the support portion (255) of the base (210).

[0211] The base (210) may be provided with a step (211) on which adhesive can be applied when bonding the side plate (302) of the cover member (300). For example, the step (211) may be formed on the outer surface of the base (210) and may be bonded to the bottom of the side plate (302) of the cover member (300).

[0212] The OIS unit (20) may include a position sensor (240) for detecting the position or displacement of the OIS moving part for OIS feedback driving. The OIS unit (20) may include a sensor magnet (34) placed on the OIS moving part (e.g., a moving frame (160)). The position sensor (240) may detect the displacement of the sensor magnet (34). The position sensor (240) may detect the magnetic field of the sensor magnet (34).

[0213] The sensor magnet (34) may include a first sensor magnet (34A) and a second sensor magnet (34B) spaced apart from each other. The first sensor magnet (34A) may be positioned adjacent to either of two adjacent corners (DA1, DA2) of the movable frame (160), and the second sensor magnet (34B) may be positioned adjacent to the other of the two adjacent corners (DA1, DA2) of the movable frame (160). In another embodiment, the first sensor magnet (34A) may be positioned in the middle of either of two adjacent sides of the movable frame (160), and the second sensor magnet (34B) may be positioned in the middle of the other of the two adjacent sides of the movable frame (160).

[0214] The position sensor (240) may be electrically connected to the circuit board (250). The position sensor (240) may be placed on the upper surface of the circuit board (250) or coupled to the upper surface of the circuit board (250). In another embodiment, the position sensor (240) may be placed on or coupled to the lower surface of the circuit board (250).

[0215] The position sensor (240) may include a first sensor (240A) that corresponds to, opposes, or overlaps with a first sensor magnet (34A) in the optical axis direction, and a second sensor (240B) that corresponds to, opposes, or overlaps with a second sensor magnet (34B) in the optical axis direction.

[0216] The first sensor (240A) can detect displacement in the first axis direction of the OIS moving part, and the second sensor (240B) can detect displacement in the second axis direction of the OIS moving part. The first axis direction and the second axis direction may intersect each other. For example, the first axis direction and the second axis direction may be perpendicular to each other. For example, the first axis direction may be the first diagonal direction, and the second axis direction may be the second diagonal direction. The first diagonal direction may be the direction in which two corners located opposite each other on the base (210) (or support frame (260)) face each other with respect to the optical axis, and the second diagonal direction may be the direction in which the other two corners located opposite each other on the base (210) (or support frame (260)) face each other with respect to the optical axis. In another embodiment, for example, the first axis direction may be the X-axis direction, and the second axis direction may be the Y-axis direction.

[0217] The first sensor (240A) can detect the displacement of the first sensor magnet (34A). The first sensor (240A) can detect the magnetic field of the first sensor magnet (34A). The second sensor (240B) can detect the displacement of the second sensor magnet (34B). The second sensor (240B) can detect the magnetic field of the second sensor magnet (34B). Each of the first sensor (240A) and the second sensor (240B) may be a Hall sensor or a driver IC containing a Hall sensor. The description of the position sensor (170) may be applied to or by analogy to each of the first sensor (240A) and the second sensor (240B).

[0218] A driving signal may be supplied to each of the first to fourth shape memory alloy members (271 to 274) through the circuit board (250) and the conductive member (75). That is, each of the four independent driving signals may be applied to any one of the corresponding first to fourth shape memory alloy members (271 to 274). For example, each of the first to fourth driving signals may be a PWM signal to increase the response speed and reduce power consumption. In another embodiment, each of the first to fourth driving signals may include at least one of a direct current or alternating current signal.

[0219] In the driving range (or driving temperature range (e.g., 100 degrees to 110 degrees)) of the shape memory alloy member (270), if the current strength of the driving signal increases, the shape memory alloy member (270) may contract and decrease in length. On the other hand, if the current strength of the driving signal decreases, the shape memory alloy member (270) may expand and increase in length.

[0220] FIG. 17a is a diagram illustrating the diagonal driving of the OIS moving part according to driving signals applied to the shape memory alloy members (271 to 274).

[0221] Referring to FIG. 17a, first to fourth driving signals (I1 to I4) may be selectively applied to first to fourth shape memory alloy members (271 to 274). By controlling the driving signals (I1 to I4), at least one of the first to fourth shape memory alloy members (271 to 274) may contract, and forces (F1 to F4) as shown in FIG. 17a may be generated. And the OIS moving part may be moved diagonally by the forces (F1 to F4).

[0222] FIG. 17b is a diagram illustrating the driving of the OIS moving part in the XY-axis direction according to driving signals applied to the shape memory alloy members (271 to 274).

[0223] Referring to FIG. 17b, driving signals may be applied to two adjacent of the first to fourth shape memory alloy members (271 to 274), and two forces described in FIG. 17a may be generated by the two adjacent shape memory alloys. Forces (F21 to F24) as illustrated in FIG. 17b may be generated by the sum of the two generated forces, and the OIS moving part may be moved in the XY-axis direction by the forces (F21 to F24).

[0224] In the embodiment, magnetic units (15A, 15B) for securing a holding force to support the bobbin (110) may be placed on both sides of the connection (or coupling) between the shape memory alloy member (50) and the bobbin (110). As a result, in the embodiment, tilting of the bobbin (110) can be prevented during AF driving, and a stable holding force can be secured.

[0225] In addition, in the embodiment, the magnetic unit (15A, 15B) can be designed solely for the purpose of securing holding force, so the size of the magnetic unit (15A, 15B) can be designed to be small, thereby reducing the weight of the AF moving part and improving the degree of design freedom of the AF moving part.

[0226] In addition, in the embodiment, the housing (140) may be provided with a partition (145), and spatial interference or collision between the shape memory alloy member (50) and the bobbin (110) may be prevented by the partition (145), damage or disconnection of the shape memory alloy member (50) may be prevented, and reliability of AF driving may be ensured.

[0227] In addition, in the embodiment, smooth contraction or expansion of the shape memory alloy member (50) may be possible through the chamfered surface (4B, 4D, 5B, 5D) formed between the bulkhead (145) and the inner surface of the side (141A) of the housing (140), and the breakage or damage of the shape memory alloy member (50) may be prevented.

[0228] In addition, in the embodiment, both ends of the shape memory alloy member (270) for OIS driving are fixed to the middle part of the side (or edge) of the fixed part (e.g., support frame (260)), and the middle part of the shape memory alloy member (270) connected to the OIS moving part is positioned adjacent to the corner of the fixed part. This allows the stroke range of the OIS moving part to be increased.

[0229] In the comparative example, both ends of the shape memory alloy member are fixed to the corners on both sides of the fixed part, and the middle part of the shape memory alloy member connected to the OIS moving part may be positioned adjacent to the middle part of the side (or edge) of the fixed part. In the embodiment, when using a shape memory alloy member of the same length, a larger OIS stroke range can be secured than in the comparative example.

[0230] In addition, in the embodiment, since both ends of the shape memory alloy member (270) are connected to a fixed part (e.g., a support frame (260)), the number of processes for electrical connection and connection of the shape memory alloy member can be reduced.

[0231] In the embodiment, the OIS moving part can be stably supported by providing an elastic member (150) separately from the shape memory alloy member (270). In addition, in the embodiment, the anti-detachment part (511) can be connected to the elastic member (150), thereby stably preventing the shape memory alloy member (270) from detaching from the OIS moving part.

[0232] In the embodiment, the first connecting part (510) of the elastic member (1500) is positioned adjacent to the projection (66) of the movable frame (160) on which the middle part of the shape memory alloy member (270) is caught or supported. As a result, when driving the OIS, the OIS moving part can be stably supported and tilting of the OIS moving part can be prevented.

[0233] Meanwhile, the lens driving device according to the above-described embodiment can be used in various fields, for example, camera devices or optical devices.

[0234] For example, the lens driving device (100) according to the embodiment may be included in an optical instrument that aims to increase the visual power of the eye by using light characteristics such as reflection, refraction, absorption, interference, and diffraction to form an image of an object in space, or to record and reproduce an image by the lens, or to perform optical measurement, propagation or transmission of the image, etc. For example, the optical instrument according to the embodiment may be a mobile phone, a smartphone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation device, etc., but is not limited thereto, and any device for taking images or photos is possible.

[0235] FIG. 18 shows an exploded perspective view of a camera device (200) according to an embodiment.

[0236] Referring to FIG. 18, the camera device (200) may include a lens module (400), a lens driving device (100), and an image sensor (810). The camera device (200) may further include at least one of a filter (610), a sensor base (600), and a circuit board (800).

[0237] The lens module (400) may include a lens or / and a lens barrel and may be mounted on or coupled to a bobbin (110) of a lens driving device (100). For example, the lens module (400) may include at least one of one or more lenses and a lens barrel that accommodates the lenses. Light passing through the lens module (400) may pass through a filter (610) and be irradiated onto an image sensor (810).

[0238] A filter (610) may be placed between the lens module (400) and the image sensor (810). The filter (610) and the image sensor (810) may be spaced apart so as to face each other in a first direction. The filter (610) may be placed below the base (210) of the lens driving device (100). The filter (610) may serve to block light of a specific frequency band from passing through the lens barrel (400) from entering the image sensor (810). For example, the filter (610) may be an infrared blocking filter.

[0239] The sensor base (600) may be positioned between the lens driving device (100) and the circuit board (800). The sensor base (600) may be positioned below the base (210) of the lens driving device (100). The sensor base (600) may be coupled with the base (210). The sensor base (600) may include a mounting portion (500) for a filter (610) to be placed or seated thereon. The sensor base (600) may include an opening corresponding to or opposite to the opening (601) of the base (210).

[0240] The circuit board (800) can be placed below the sensor base (600). The sensor base (600) can be coupled to the upper surface of the circuit board (800).

[0241] The image sensor (810) may be placed on the circuit board (800). The image sensor (810) may be electrically connected to the circuit board (800). The image sensor (810) may receive an image contained in light that has passed through the lens module (400) and the filter (610), and may convert the received image into an electrical signal. The image sensor (810) may be positioned so that its optical axis aligns with that of the lens module (400).

[0242] The circuit board (800) may include a plurality of terminals (811) for electrically connecting to the lens driving device (100) and a connector (840) for electrically connecting to an external device. The plurality of terminals (811) may be electrically connected to the terminal (195) of the circuit board (190) of the lens driving device (110) and the terminal (251) of the circuit board (250).

[0243] The camera device (200) may further include a motion sensor (820) disposed on a circuit board (800). The motion sensor (820) may be electrically connected to the circuit board (800). The motion sensor (820) may output rotational angular velocity information resulting from the movement of the camera device (200). The motion sensor (820) may be implemented as a 2-axis, 3-axis, or 5-axis gyro sensor or an angular velocity sensor.

[0244] The camera device (200) may further include a control unit (830) that is placed on a circuit board (800) and electrically connected to the circuit board (800). The control unit (830) may be electrically connected to a motion sensor (820). The control unit (830) may be electrically connected to a position sensor (170), a first sensor (240A), and a second sensor (240B) of a lens driving device (100). Additionally, the control unit (830) may be electrically connected to a shape memory alloy member (50) of the lens driving device (100) for AF driving. Additionally, the control unit (830) may be electrically connected to a shape memory alloy member (270) of the lens driving device (100) for OIS driving.

[0245] The control unit (830) can supply a driving signal (or power) to each of the position sensor (170), the first sensor (240A), and the second sensor (240B). Additionally, the control unit (830) can receive the output of each of the position sensor (170), the first sensor (240A), and the second sensor (240B).

[0246] The control unit (830) can supply a driving signal to each of the shape memory alloy members (51, 52) for AF driving. The control unit (830) can supply a driving signal to each of the shape memory alloy members (271 to 274) for OIS driving.

[0247] The control unit (830) can control the driving signal supplied to the shape memory alloy members (51, 52) for AF driving using the output of the position sensor (170). The control unit (830) can control the driving signal supplied to each of the shape memory alloy members (271 to 274) for OIS driving using the output of the first sensor (240A) and the output of the second sensor (240B).

[0248] If the position sensor (170), the first sensor (240A), and the second sensor (240B) are driver ICs including Hall sensors, the control unit (830) can perform data communication, e.g., I2C communication, with each of the position sensor (170), the first sensor (240A), and the second sensor (240B).

[0249] FIG. 19 shows a perspective view of an optical device (200A) according to an embodiment, and FIG. 20 shows a configuration diagram of the optical device (200A) shown in FIG. 19.

[0250] Referring to FIGS. 19 and 20, the optical device (200A) may include a body (850), a wireless communication unit (710), an A / V input unit (720), a sensing unit (740), an input / output unit (750), a memory unit (760), an interface unit (770), a control unit (780), and a power supply unit (790).

[0251] The body (850) illustrated in FIG. 19 is in the form of a bar, but is not limited thereto and may have various structures such as a slide type, folder type, swing type, swivel type, etc., in which two or more sub-bodies are combined to move relative to each other.

[0252] The body (850) may include a case (casing, housing, cover, etc.) forming the exterior. For example, the body (850) may be divided into a front case (851) and a rear case (852). Various electronic components of the terminal may be embedded in the space formed between the front case (851) and the rear case (852).

[0253] The wireless communication unit (710) may be configured to include one or more modules that enable wireless communication between the optical device (200A) and the wireless communication system or between the optical device (200A) and the network where the optical device (200A) is located. For example, the wireless communication unit (710) may be configured to include a broadcast reception module (711), a mobile communication module (712), a wireless internet module (713), a short-range communication module (714), and a location information module (715).

[0254] The A / V (Audio / Video) input unit (720) is for inputting an audio signal or a video signal and may include a camera (721) and a microphone (722), etc. The camera (721) may include a camera device (200) according to the embodiment.

[0255] The sensing unit (740) can generate a sensing signal to control the operation of the optical device (200A) by detecting the current state of the optical device (200A), such as the open / closed state of the optical device (200A), the position of the optical device (200A), whether there is user contact, the orientation of the optical device (200A), and the acceleration / deceleration of the optical device (200A). For example, if the optical device (200A) is in the form of a slide phone, it can sense whether the slide phone is open or closed. In addition, it is responsible for sensing functions related to whether power is supplied by the power supply unit (790) and whether an external device is connected to the interface unit (770).

[0256] The input / output unit (750) is intended to generate input or output related to sight, hearing, or touch. The input / output unit (750) can generate input data for controlling the operation of the optical device (200A) and can also display information processed by the optical device (200A).

[0257] The input / output unit (750) may include a keypad unit (730), a display module (751), an audio output module (752), and a touch screen panel (753). The keypad unit (730) may generate input data by keypad input.

[0258] The display module (751) may include a plurality of pixels whose color changes according to an electrical signal. For example, the display module (751) may include at least one of a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a 3D display.

[0259] The sound output module (752) can output audio data received from the wireless communication unit (710) in call signal reception, call mode, recording mode, voice recognition mode, or broadcast reception mode, or output audio data stored in the memory unit (760).

[0260] The touch screen panel (753) can convert a change in capacitance caused by a user's touch on a specific area of ​​the touch screen into an electrical input signal.

[0261] The memory unit (760) may store a program for processing and controlling the control unit (780), and may temporarily store input / output data (e.g., phone book, message, audio, still image, photo, video, etc.). For example, the memory unit (760) may store an image captured by the camera (721), such as a photo or video.

[0262] The interface section (770) serves as a passage connecting to an external device connected to the optical device (200A). The interface section (770) receives data from the external device, supplies power to transmit it to each component inside the optical device (200A), or allows data inside the optical device (200A) to be transmitted to the external device. For example, the interface section (770) may include a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device equipped with an identification module, an audio I / O (Input / Output) port, a video I / O (Input / Output) port, and an earphone port.

[0263] The controller (780) can control the overall operation of the optical device (200A). For example, the controller (780) can perform related control and processing for voice calls, data communication, video calls, etc.

[0264] The control unit (780) may be equipped with a multimedia module (781) for multimedia playback. The multimedia module (781) may be implemented within the control unit (780) or may be implemented separately from the control unit (780).

[0265] The control unit (780) can perform pattern recognition processing to recognize handwriting input or drawing input performed on the touchscreen as characters and images, respectively.

[0266] The power supply unit (790) can receive external power or internal power under the control of the control unit (780) and supply power necessary for the operation of each component.

[0267] The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment may be combined or modified and implemented in other embodiments by a person skilled in the art to which the embodiments belong. Therefore, details regarding such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0268] The embodiment can be used in a lens driving device and a camera device including the same, which can prevent tilting of the bobbin and secure a stable holding force during AF driving.

Claims

Housing; A bobbin disposed within the above housing; A ball member disposed between the above bobbin and the above housing; A first magnetic body comprising a first magnetic unit and a second magnetic unit disposed on the first side of the above bobbin and spaced apart from each other; A second magnetic body disposed in the housing to correspond to the first magnetic body and having an attractive force with the first magnetic body; and A shape memory alloy member comprising a first end coupled to one region of the housing, a second end coupled to another region of the housing, and a first region connected to a part of the first side of the bobbin. The above shape memory alloy member moves the bobbin in the direction of the optical axis, and The first region of the shape memory alloy member is a lens driving device disposed between the first magnetic unit and the second magnetic unit. In paragraph 1, A lens driving device comprising a coupling portion into which the first region of the shape memory alloy member is inserted, and which protrudes from the outer surface of the first side of the bobbin. In paragraph 2, The above coupling part is a lens driving device disposed between the first magnetic unit and the second magnetic unit. In paragraph 2, The above housing includes a first side facing the first side of the bobbin, and The second magnetic body comprises a third magnetic unit that exerts an attractive force with the first magnetic unit and a fourth magnetic unit that exerts an attractive force with the second magnetic unit, and The third and fourth magnetic units are a lens driving device disposed between the first side of the bobbin and the first side of the housing. A housing comprising a first side and a second side located opposite each other, and a third side and a fourth side positioned between the first side and the second side and located opposite each other; A bobbin disposed within the above housing; and It includes a shape memory alloy member that moves the above bobbin in the direction of the optical axis, and The shape memory alloy member comprises a first end coupled to one region of the housing, a second end coupled to another region of the housing, a first region connected to a part of the first side of the bobbin opposite to the first side of the housing, a second region connecting the first end and the first region, and a third region connecting the second end and the first region. A lens driving device wherein the housing comprises a partition disposed between the first side of the bobbin and the first side of the housing, and at least a portion of the second region and at least a portion of the third region of the shape memory alloy member are disposed between the first side of the housing and the partition. In paragraph 5, A lens driving device comprising a coupling portion into which the first region of the shape memory alloy member is inserted, and which protrudes from the outer surface of the first side of the bobbin. In paragraph 6, The above bulkhead of the housing includes a first opening through which the coupling portion of the bobbin passes. In Paragraph 7, A lens driving device in which the first side of the housing includes a second opening that exposes the coupling portion of the bobbin. In paragraph 8, A lens driving device comprising a detachment prevention member disposed on the coupling portion of the above bobbin and covering at least a portion of the first region of the shape memory alloy member. In paragraph 5, The above housing includes a guide portion disposed between the first side of the housing and the partition wall, wherein the second region and the third region of the shape memory alloy member are disposed therein. A lens driving device in which the upper or lower surface of the above guide portion includes an inclined surface.

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