Patent Publication Number: US-2023152554-A1

Title: Lens moving apparatus, and camera module and portable device including the same

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. application Ser. No. 17/376,945, filed Jul. 15, 2021; which is a continuation of U.S. application Ser. No. 15/790,483, filed Oct. 23, 2017, now U.S. Pat. No. 11,099,351, issued Aug. 24, 2021; which claims priority to and the benefit of Korea Application Nos. 10-2016-0138204, filed on Oct. 24, 2016; and 10-2016-0138205, filed on Oct. 24, 2016, the disclosures of each of which is incorporated herein by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     Embodiments relate to a lens moving apparatus, and a camera module and a portable device including the same. 
     BACKGROUND 
     Mobile phones or smartphones that are equipped with a camera module for photographing a subject and storing the photographed subject as an image or a motion picture have been developed. In general, a camera module may include a lens, an image sensor module, and a lens moving apparatus for adjusting the distance between the lens and the image sensor module. 
     Portable devices, such as mobile phones, smartphones, tablet PCs, and laptop computers, are equipped with a subminiature camera module. A lens moving apparatus is capable of adjusting the distance between an image sensor (not shown) and a lens to set the focal distance of the lens (auto focusing). 
     For example, the image sensor may be mounted on a board, which is disposed under the lens moving apparatus, so as to be opposite the lens in an optical-axis direction. 
     In addition, the camera module may shake minutely due to the shaking of a user&#39;s hand while photographing a subject. Lens moving apparatuses having an optical image stabilization (OIS) function for correcting the distortion of an image or a moving picture due to the shaking of a user&#39;s hand have been developed. 
     SUMMARY 
     Embodiments provide a lens moving apparatus having a structure capable of preventing parts from being deformed or damaged during assembly thereof and a camera module and a portable device including the same. 
     In one embodiment, a lens moving apparatus includes a cover member, a housing disposed in the cover member, a bobbin disposed in the housing, the bobbin being provided in an inner circumferential surface thereof with a screw thread, the bobbin being configured to move in a first direction, which is parallel to an optical-axis direction, a first coil provided on an outer circumferential surface of the bobbin, a first magnet coupled to the housing so as to be opposite the first coil, an upper elastic member provided at an upper surface of the bobbin, the upper elastic member being coupled to the bobbin and the housing, a lower elastic member provided at a lower surface of the bobbin, the lower elastic member being coupled to the bobbin and the housing, a circuit member comprising a second coil disposed under the housing so as to be opposite the first magnet, a circuit board disposed at a lower side of the circuit member, the circuit board being connected to the circuit member, a plurality of support members connected to the upper elastic member, and a base disposed under the circuit board, the base being coupled to the cover member, wherein the upper surface the bobbin comprises a protrusion coupled to the upper elastic member and a recess spaced apart from the protrusion, wherein the recess of the bobbin comprises two recesses disposed so as to be symmetrical with respect to an optical axis, and wherein the cover member comprises a recess disposed at position corresponding to the recess of the bobbin. 
     In another embodiment, a lens moving apparatus includes a bobbin configured to move in a first direction, a first coil provided on the outer circumferential surface of the bobbin, a housing having the bobbin provided therein, a first magnet coupled to the housing, an upper elastic member provided at the upper side of the bobbin, the upper elastic member being coupled to the bobbin and the housing, a lower elastic member provided at the lower side of the bobbin, the lower elastic member being coupled to the bobbin and the housing, a circuit member including a second coil disposed at the lower side of the housing so as to be opposite the first magnet, a printed circuit board disposed at the lower side of the circuit member, the printed circuit board being connected to the circuit member, and a base disposed at the lower side of the printed circuit board, wherein the bobbin is provided at a part thereof to which a lens barrel is bonded with an edge region for increasing the area of an adhesive that is applied. 
     In another embodiment, a camera module includes a lens, an image sensor provided so as to be opposite the lens in a first direction, and the lens moving apparatus. 
     In a further embodiment, a portable device includes a display panel including a plurality of pixels, the colors of which are changed according to an electrical signal, the camera module for converting an image incident through a lens into an electrical signal, and a controller for controlling the operation of the display panel and the camera module. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Arrangements and embodiments may be described in detail with reference to the following drawings in which like reference numerals refer to like elements and wherein: 
         FIG.  1    is a perspective view schematically showing a lens moving apparatus according to an embodiment; 
         FIG.  2    is an exploded perspective view showing the lens moving apparatus according to the embodiment; 
         FIG.  3    is a perspective view showing a bobbin according to an embodiment; 
         FIG.  4    is a perspective view showing a housing according to an embodiment; 
         FIG.  5    is a sectional perspective view showing a lens moving apparatus according to another embodiment; 
         FIG.  6    is a front view of  FIG.  5   ; 
         FIG.  7    is a partial sectional perspective view of  FIG.  5   ; 
         FIG.  8 A  is a front view of  FIG.  7   ; 
         FIG.  8 B  is an enlarged sectional view showing a recess according to an embodiment; 
         FIG.  9 A  is a plan view showing a lens moving apparatus according to another embodiment; 
         FIG.  9 B  is a view identical to  FIG.  9 A  except that a cover member is removed therefrom; 
         FIG.  9 C  is a view showing another embodiment of  FIG.  9 B ; 
         FIG.  10    is a perspective view schematically showing a lens moving apparatus according to another embodiment; 
         FIG.  11 A  is an exploded perspective view showing the lens moving apparatus according to the embodiment; 
         FIG.  11 B  is an exploded perspective view showing a lens moving apparatus according to another embodiment different from  FIG.  11 A ; 
         FIG.  12    is a perspective view showing a bobbin according to a further embodiment; 
         FIG.  13    is a perspective view showing a housing according to a further embodiment; 
         FIG.  14    is a perspective view of the bobbin, illustrating an application extension region according to an embodiment; 
         FIG.  15    is an enlarged view showing part A of  FIG.  14   ; 
         FIG.  16    is a plan view showing the lens moving apparatus according to the embodiment; 
         FIG.  17    is a sectional view showing the lens moving apparatus according to the embodiment; 
         FIG.  18    is an enlarged view showing part B of  FIG.  17   ; 
         FIG.  19    is a perspective view of the bobbin, illustrating an application extension region according to another embodiment; 
         FIG.  20    is an enlarged view showing part C of  FIG.  19   ; 
         FIG.  21    is a perspective view of the bobbin, illustrating an application extension region according to a further embodiment; 
         FIG.  22    is an enlarged view showing part D of  FIG.  21   ; 
         FIG.  23    is a perspective view showing a portable device according to an embodiment; and 
         FIG.  24    is a block diagram of the portable device shown in  FIG.  23   . 
     
    
    
     DESCRIPTION OF SPECIFIC EMBODIMENTS 
     Hereinafter, embodiments will be described with reference to the annexed drawings. In the drawings, the same or similar elements are denoted by the same reference numerals even though they are depicted in different drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the disclosure rather unclear. Those skilled in the art will appreciate that some features in the drawings are exaggerated, reduced, or simplified for ease in description, and drawings and elements thereof are not shown always at the proper rate. 
     For reference, in the respective drawings, a rectangular coordinate system (x, y, z) may be used. In the drawings, the x-axis and the y-axis mean a plane perpendicular to an optical axis and, for convenience, an optical axis (z-axis) direction may be referred to as a first direction, an x-axis direction may be referred to as a second direction, and a y-axis direction may be referred to as a third direction. 
       FIG.  1    is a perspective view schematically showing a lens moving apparatus according to an embodiment.  FIG.  2    is an exploded perspective view showing the lens moving apparatus according to the embodiment. 
     An auto-focusing apparatus applied to a small-sized camera module in a mobile device, such as a smartphone or a tablet PC, is an apparatus that automatically focuses an image of a subject on the surface of an image sensor (not shown). The auto-focusing apparatus may be variously configured. In this embodiment, an optical module, including a plurality of lenses, may be moved in the first direction in order to perform an auto-focusing operation. 
     As shown in  FIG.  2   , the lens moving apparatus according to the embodiment may include a moving unit and a stationary unit. The moving unit may perform an auto-focusing function. The moving unit may include a bobbin  1110  and a first coil  1120 . The stationary unit may include a first magnet  1130 , a housing  1140 , an upper elastic member  1150 , and a lower elastic member  1160 . 
     The bobbin  1110  may be mounted in the housing  1140  so as to move in an optical-axis direction or in the first direction, which is parallel to the optical-axis direction. The first coil  1120 , which is disposed in the first magnet  1130 , may be provided on the outer circumferential surface of the bobbin  1110 . The bobbin  1110  may be mounted in the housing  1140  so as to reciprocate in the first direction through electromagnetic interaction between the first magnet  1130  and the first coil  1120 . The first coil  1120  may be provided on the outer circumferential surface of the bobbin  1110  so as to electromagnetically interact with the first magnet  1130 . 
     In addition, the bobbin  1110  may move in the first direction in order to perform the auto-focusing function while being elastically supported by the upper and lower elastic members  1150  and  1160 . 
     The bobbin  1110  may include a lens barrel LB 2  (see  FIG.  8 A ), in which at least one lens is mounted. The lens barrel LB 2  may be coupled in the bobbin  1110  in various manners. 
     For example, a female screw thread may be formed in the inner circumferential surface of the bobbin  1110 , and a male screw thread corresponding to the female screw thread may be formed in the outer circumferential surface of the lens barrel LB 2  such that the lens barrel LB 2  is coupled to the bobbin  1110  by screw engagement. 
     However, the disclosure is not limited thereto. No screw thread may be formed in the inner circumferential surface of the bobbin  1110 , in which case the lens barrel LB 2  may be directly fixed to the inside of the bobbin  1110  using a method other than screw engagement. 
     Alternatively, one or more lenses may be integrally formed with the bobbin  1110  without the lens barrel LB 2 . In this embodiment, however, the bobbin  1110  and the lens barrel LB 2  are coupled by screw engagement. In this embodiment, therefore, a screw thread may be formed in the inner circumferential surface of the bobbin  1110  such that the lens barrel LB 2  is coupled to the bobbin  1110  by screw engagement. 
     One lens may be coupled to the lens barrel LB 2 , or two or more lenses may be provided in order to constitute an optical system. 
     The auto-focusing function may be controlled by varying the direction of current and/or the amount of current. The bobbin  1110  may move in the first direction in order to perform the auto-focusing function. 
     For example, when forward current is supplied, the bobbin  1110  may move upward from the initial position thereof. When reverse current is supplied, the bobbin  1110  may move downward from the initial position thereof. Alternatively, the amount of current in one direction may be adjusted to increase or decrease the movement distance of the bobbin  1110  in the direction from the initial position thereof. 
     The bobbin  1110  may be provided on the upper surface and the lower surface thereof with a plurality of upper support protrusions and a plurality of lower support protrusions, respectively. The upper support protrusions may be formed in a cylindrical shape or in a prism shape. The upper support protrusions may be coupled and fixed to the upper elastic member  1150  in order to guide the upper elastic member  1150 . 
     The lower support protrusions may be formed in a cylindrical shape or in a prism shape, in the same manner as the upper support protrusions. The lower support protrusions may be coupled and fixed to the lower elastic member  1160  in order to guide the lower elastic member  1160 . 
     The upper elastic member  1150  may be provided at the upper side of the bobbin  1110 , and the lower elastic member  1160  may be provided at the lower side of the bobbin  1110 . The upper elastic member  1150  and the lower elastic member  1160  may be coupled to the bobbin  1110  and the housing  1140 , respectively. The upper elastic member  1150  may be provided with through holes and/or recesses corresponding to the upper support protrusions, and the lower elastic member  1160  may be provided with through holes and/or recesses corresponding to the lower support protrusions. 
     The support protrusions may be fixedly coupled to the through holes and/or the recesses by thermal fusion or using an adhesive member, such as epoxy. 
     The housing  1140  may be formed in the shape of a hollow pillar for supporting the first magnet  1130 . The housing  1140  may have an approximately quadrangular shape, and may be disposed in a cover member  1300 . The first magnet  1130  may be coupled to the side surface of the housing  1140 . 
     In addition, as described above, the bobbin  1110 , which is guided by the upper and lower elastic members  1150  and  1160  so as to move in the first direction, may be mounted in the housing  1140 . 
     In this embodiment, the first magnet  1130  may have a bar shape, and may be coupled to or disposed at the side of the housing  1140 . In another embodiment, the first magnet  1130  may have a trapezoidal shape, and may be coupled to or disposed at the corner of the housing  1140 . 
     Meanwhile, a single first magnet  1130  may be provided, or two or more first magnets  1130  may be provided. In addition, a plurality of first magnets may be arranged in the first direction so as to have a multi-layered structure. 
     The upper elastic member  1150  and the lower elastic member  1160  may elastically support the upward and/or downward movement of the bobbin  1110  in the first direction. Each of the upper elastic member  1150  and the lower elastic member  1160  may be, for example, a leaf spring. 
     As shown in  FIG.  2   , the upper elastic member  1150  may be divided into two parts. Consequently, currents having different polarities and different powers may be supplied to the divided parts of the upper elastic member  1150 , or may be transmitted through the divided parts of the upper elastic member  1150 . 
     In a modification, the lower elastic member  1160  may be divided into two parts, and the upper elastic member  1150  may have a single structure. 
     Meanwhile, the upper elastic member  1150 , the lower elastic member  1160 , the bobbin  1110 , and the housing  1140  may be assembled by thermal fusion and/or bonding using an adhesive. At this time, thermal fusion may be performed, and then bonding using the adhesive may be performed. 
     A base  1210  may be disposed at the lower side of the bobbin  1110  and a printed circuit board  1250 , and may have an approximately quadrangular shape. The printed circuit board  1250  may be located on the base  1210 . The base  1210  may be provided in the surface thereof that faces the part of the printed circuit board  1250  at which a terminal surface  1253  is formed with a support recess having a size corresponding to the size of the part of the printed circuit board  1250  at which the terminal surface  1253  is formed. In addition, the base  1210  may be disposed at the lower side of the housing  1140  so as to be coupled to the cover member  1300 . 
     The support recess may be formed inward from the outer circumferential surface of the base  1210  by a predetermined depth in order to prevent the part of the printed circuit board  1250  at which the terminal surface  1253  is formed from protruding outward or to adjust the extent of protrusion of the part of the printed circuit board  1250  at which the terminal surface  1253  is formed. 
     A support member  1220  may be disposed at the corner of the housing  1140 . The upper side of the support member  1220  may be coupled and connected to the upper elastic member  1150 , and the lower side of the support member  1220  may be coupled to the base  1210  and to a board including the printed circuit board  1250  and a circuit member  1231 . The support member  1220  may support the bobbin  1110  and the housing  1140  such that the bobbin  1110  and the housing  1140  can move in the second direction and/or the third direction, which are perpendicular to the first direction. In addition, the support member  1220  may be connected to the first coil  1120 . 
     The support member  1220  may be disposed at the corner of the housing  1140  so as to elastically support the housing  1140 . A plurality of support members  1220  may be provided. In this embodiment, four support members  1220  may be disposed at respective corners of the housing  1140 . The support member  1220  may be made of an elastic material such that the bobbin  1110  and the housing  1140  can move in the x-y plane. 
     In another embodiment, six support members may be provided such that two support members are disposed at each of two corners and one support member is disposed at each of the remaining two corners. Depending on the circumstances, a total of seven or more support members may be provided. 
     In addition, the support member  1220  may be connected to the upper elastic member  1150 . For example, the support member  1220  may be connected to the part of the upper elastic member  1150  in which the through holes are formed. 
     In addition, since the support member  1220  is formed separably from the upper elastic member  1150 , the support member  1220  may be connected to the upper elastic member  1150  by a conductive adhesive, soldering, or welding. Consequently, the upper elastic member  1150  may supply current to the first coil  1120  via the support member  1220 . 
     The lower part of the support member may be inserted into a through hole formed in the board including the circuit member  1231  and the printed circuit board  1250  and may be coupled to the board by soldering. That is, the lower part of the support member  1220  may be inserted into and soldered to the through hole formed in the circuit member  1231  and/or the printed circuit board  1250 , whereby the support member  1220  may be connected to the board. 
     Alternatively, no through hole may be formed in the circuit member  1231  and/or in the printed circuit board  1250 , and the support member  1220  may be soldered to a corresponding part of the circuit member  1231 . 
     In  FIG.  2   , a linear support member  1220  is shown as an embodiment. However, the disclosure is not limited thereto. For example, the support member  1220  may be formed in the shape of a sheet member. 
     The second coil  1230  may move the housing  1140  in the second direction and/or the third direction through electromagnetic interaction with the first magnet  1130 , and the support member  1220  may be elastically deformed, whereby optical image stabilization may be performed. 
     Here, the second and third directions may include directions that are substantially close to the x-axis direction (or the first direction) and the y-axis direction (or the second direction), in addition to the x-axis direction and the y-axis direction. That is, in this embodiment, the housing  1140  may move parallel to the x-axis and the y-axis. In addition, when the housing  1140  moves while being supported by the support member  1220 , the housing  1140  may move in the state of being slightly inclined relative to the x-axis and the y-axis. 
     Consequently, it is necessary to mount the first magnet  1130  to a position corresponding to the second coil  1230 . 
     The second coil  1230  may be disposed so as to be opposite the first magnet  1130  fixed to the housing  1140 . In an embodiment, the second coil  1230  may be disposed outside the first magnet  1130 . Alternatively, the second coil  1230  may be disposed at the lower side of the first magnet  1130  so as to be spaced apart from the first magnet  1130  by a predetermined distance. Alternatively, the second coil  1230  may be disposed at the lower side of the housing  1140  so as to be opposite the first magnet  1130 . 
     In this embodiment, four second coils  1230  may be disposed at four sides of the circuit member  1231 . However, the disclosure is not limited thereto. Only one second coil may be provided for the second direction, and only one second coil may be provided for the third direction. Alternatively, more than four second coils may be provided. 
     Alternatively, one second coil may be provided at the first side for the second direction, two second coils may be provided at the second side for the second direction, one second coil may be provided at the third side for the third direction, and two second coils may be provided at the fourth side for the third direction. That is, a total of six second coils may be provided. In this case, the first side and the fourth side may be adjacent to each other, and the second side and the third side may be adjacent to each other. 
     In this embodiment, a circuit pattern corresponding to the shape of the second coil  1230  may be formed on the circuit member  1231 . Alternatively, a separate second coil may be disposed on the circuit member  1231 . However, the disclosure is not limited thereto. A circuit pattern corresponding to the shape of the second coil  1230  may be directly formed on the circuit member  1231 . 
     Alternatively, a wire is wound in the shape of a doughnut in order to form the second coil  1230 . Alternatively, the second coil  1230  may be formed in the shape of an FP coil, which may be connected to the printed circuit board  1250 . 
     The circuit member  1231  including the second coil  1230  may be mounted or disposed at the upper surface of the printed circuit board  1250 , which is disposed at the upper side of the base  1210 . However, the disclosure is not limited thereto. The second coil  1230  may be in tight contact with the base  1210 , or may be spaced apart from the base  1210  by a predetermined distance. The second coil  1230  may be formed on a separate board, which may be stacked on and connected to the printed circuit board  1250 . 
     The board may be disposed between the housing  1140  and the base  1210 , and may include the circuit member  1231  and the printed circuit board  1250 . The circuit member  1231  and the printed circuit board  1250  may be connected to each other. 
     The circuit member  1231  may be provided with the second coil  1230 , which is disposed so as to be opposite the first magnet  1130 . The circuit member  1231  may be disposed at the upper side of the printed circuit board  1250 . 
     The printed circuit board  1250  may be disposed at the lower side of the circuit member  1231 , may be connected to at least one of the upper and lower elastic members  1150  and  1160 , and may be coupled to the upper surface of the base  1210 . The printed circuit board  1250  may be provided at a position thereof corresponding to the end of the support member  1220  with a through hole, into which the support member  1220  is inserted. Alternatively, no through hole may be formed, and the printed circuit board may be connected or bonded to the support member. 
     In another embodiment, when the support member  1220  is coupled to the circuit member  1231 , the printed circuit board  1250  may be provided at the corner thereof corresponding to the support member  1220  with an escape portion for easy coupling, such as soldering, between the support member  1220  and the circuit member  1231 . 
     The printed circuit board  1250  may be coupled to the upper surface of the base  1210 , may be disposed at the lower side of the circuit member  1231 , and may be connected to the circuit member  1231 . The printed circuit board  1250  may be provided with a terminal surface  1253 , which is disposed at the side surface of the base  1210  and on which a terminal  1251  is disposed. In this embodiment, the printed circuit board  1250  has two bent terminal surfaces  1253 . 
     A plurality of terminals  1251  may be disposed on the terminal surface  1253  in order to supply current from an external power source to the first coil  1120  and the second coil  1230 . The number of terminals  1251  formed on the terminal surface  1253  may be changed depending on the kind of components to be controlled. In addition, the printed circuit board  1250  may have one terminal surface  1253 . Alternatively, the printed circuit board  1250  may have two or more terminal surfaces  1253 . 
     The cover member  1300  may be formed in the shape of a box having corners. The cover member  1300  may receive the moving unit, the second coil  1230 , and a portion or the entirety of the printed circuit board  1250 , and may be coupled to the base  1210 . The cover member  1300  protects the moving unit, the second coil  1230 , and the printed circuit board  1250  received therein so as to protect the same from damage. 
     In addition, the cover member  1300  may prevent an electromagnetic field generated by the first magnet  1130 , the first coil  1120 , and the second coil  1230  received therein from leaking to the outside in order to condense the electromagnetic field. 
     Hereinafter, the structures of the bobbin  1110  and the housing  1140  will be described in more detail with reference to  FIGS.  3  and  4   .  FIG.  3    is a perspective view showing a bobbin  1110  according to an embodiment. 
     The bobbin  1110  may include a protrusion  1113  and a third projecting part  1111 . The protrusion  1113  is a portion that is coupled into the through hole formed in the upper elastic member  1150 . The protrusion  1113  may be formed in a cylindrical shape or any of various other shapes. The protrusion  1113  may guide the upper elastic member  1150  such that the upper elastic member  1150  is coupled to the bobbin  1110 . The length of the protrusion  1113  in the first direction may be, for example, 0.2 to 0.3 mm. 
     The third projecting part  1111  may be formed on the upper surface of the bobbin  1110 . When external impact is applied, the upper surface of the third projecting part  1111  may collide with the lower surface of the cover member  1300  in order to prevent plastic deformation exceeding the elastic limit of a spring. 
     In the case in which the initial position of the bobbin  1110  is set to the position at which the bobbin  1110  cannot move downward any further, auto-focusing of the bobbin  1110  may be controlled in one direction. That is, the bobbin  1110  moves upward when the amount of current that is supplied to the first coil  1120  increases, and the bobbin  1110  moves downward to the initial position thereof when the amount of current that is supplied to the first coil  1120  decreases, whereby the auto-focusing function may be performed. 
     However, in the case in which the initial position of the bobbin  1110  is set to provide a distance by which the bobbin  1110  can move downward, the auto-focusing of the bobbin  1110  may be controlled in opposite directions. That is, the bobbin  1110  may move upward or downward in the first direction, whereby the auto-focusing function may be performed. 
     For example, when forward current is supplied, the bobbin  1110  may move upward. When reverse current is supplied, the bobbin  1110  may move downward. 
       FIG.  4    is a perspective view showing a housing  1140  according to an embodiment. The housing  1140  may support the magnet  1130 , and may receive therein the first bobbin  1110 , which moves in the first direction. 
     The housing  1140  may be generally formed in the shape of a hollow pillar. For example, the housing  1140  may have a polygonal hollow part (e.g. a quadrangular or octagonal hollow part) or a circular hollow part. 
     The housing  1140  may include a second upper support protrusion  1143  and a fourth projecting part  1144 . The second upper support protrusion  1143  is a portion that is coupled into the through hole formed in the upper elastic member  1150 . 
     The second upper support protrusion  1143  may be formed in a cylindrical shape or any of various other shapes. The second upper support protrusion  1143  may guide the upper elastic member  1150  such that the upper elastic member  1150  is coupled to the housing  1140 . 
     The fourth projecting part  1144  may be formed on the upper surface of the housing  1140 . The fourth projecting part  1144  may serve to stop the cover member  1300  and the housing  1140 . That is, when external impact is applied, the upper surface of the fourth projecting part  1144  may collide with the lower surface of the cover member  1300  in order to prevent the cover member  1300  and the housing  1140  from directly colliding with each other. 
     The bobbin  1110  may have a plurality of projecting regions, each of which projects from the side surface thereof and has a predetermined width. Hereinafter, the predetermined width of each of the projecting regions will be referred to as a first width W 11  (see  FIG.  3   ). As will be described below, the projecting regions may be first stoppers  1112 . 
     The housing  1140  may be provided with a plurality of recessed regions at positions thereof corresponding to the projecting regions of the bobbin  1110 . Hereinafter, the recessed regions will be referred to as third recessed parts  1148 . 
     The surface of each third recessed part  1148  in the housing  1140  opposite the bobbin  1110  may have a shape that corresponds to a corresponding one of the projecting regions of the bobbin  1110 . Each of the first width W 11  of the bobbin  1110  shown in  FIG.  3    and a second width W 22  of each third recessed part  1148  in the housing  1140  shown in  FIG.  4    may have a predetermined tolerance. Here, the second width W 22  is a predetermined width of each third recessed part  1148 . 
     Since the third recessed part  1148  is disposed so as to corresponding to the first width W 11  of the bobbin  1110 , the bobbin  1110  may be prevented from rotating relative to the housing  1140 . Even when force for rotating the bobbin  1110  about an optical axis or an axis parallel to the optical axis is applied to the bobbin  1110 , therefore, the third recessed part  1148  in the housing  1140  may prevent the rotation of the bobbin  1110 . 
     In addition, the housing  1140  may be provided in the corner thereof with a second through-hole  1147 . The support member  1220  may extend through the second through-hole  1147  in the first direction so as to be connected to the upper elastic member  1150 . 
     In this embodiment, four support members  1220  are disposed at respective corners of the housing  1140 . Consequently, a number of second through-holes  1147  equal to the number of support members  1220 , i.e. four second through-holes  1147 , may also be provided at positions corresponding to the support members  1220 . Of course, when the number of support members  1220  is changed, the number of second through-holes  1147  may be changed. 
     In another embodiment, recessed parts, through which the support members  1220  extend, may be formed in the corners of the housing  1140 , instead of the second through-holes  1147 . In the same manner as described above, the number of recessed parts may be changed depending on the number of support members  1220 . 
     Meanwhile, the housing  1140  may be provided at the lower surface of each corner thereof with a lower support protrusion (not shown) for coupling with the lower elastic member  1160 . The lower support protrusion may be provided at a position corresponding to the upper support protrusion while having a shape corresponding to the shape of the upper support protrusion. However, the disclosure is not limited thereto. 
     The housing  1140  may be provided with a plurality of third stoppers  1149  protruding from the respective sides thereof. The third stoppers  1149  may serve to prevent the housing  1140  from colliding with the cover member  1300  when the housing  1140  moves in the second and third directions. 
       FIG.  5    is a sectional perspective view showing a lens moving apparatus according to another embodiment.  FIG.  6    is a front view of  FIG.  5   . In this embodiment, as shown in  FIGS.  5  and  6   , the bobbin  1110  may be provided with a recess  1700 . 
     When components of the lens moving apparatus according to the embodiment are assembled, an assembly apparatus may be coupled into the recess  1700  in order to easily perform the assembly operation. 
     In another embodiment, although not shown, the recess may also be formed in the housing  1140 . The assembly apparatus may be coupled into the recess formed in the housing  1140 , in the same manner as the recess  1700  formed in the bobbin  1110 . 
     Since the recess is formed in the housing  1140  or the bobbin  1110 , the operation of assembling the lens moving apparatus may be easily performed, and damage to the lens moving apparatus which may be caused during the assembly operation may be effectively prevented. 
     For example, when the lens barrel LB 2  is coupled to the bobbin  1110 , a rotation preventing means  10  for preventing the bobbin  1110  from rotating relative to the lens barrel LB 2  may be coupled into the recess  1700 . 
     In the lens moving apparatus according to the embodiment, the lens barrel LB 2  may be coupled to the bobbin  1110  by screw engagement. That is, the bobbin  1110  may be provided in the inner circumferential surface thereof with a screw thread SC, with which the lens barrel LB 2  engages, and the lens barrel LB 2  may be provided in the outer circumferential surface thereof with a screw thread that engages with the screw thread SC formed in the bobbin  1110 . 
     The lens barrel LB 2  may be rotated in order to couple the lens barrel LB 2  to the screw thread SC in the bobbin  1110 . At this time, the bobbin  1110  may rotate due to frictional force generated between the lens barrel LB 2  and the bobbin  1110 . 
     When the bobbin  1110  rotates, force may be applied to the connection between the housing  1140 , in which the bobbin  1110  is mounted, and the bobbin  1110 . The force may cause abrasion of the bobbin  1110  and the housing  1140  or even breakage of the bobbin  1110  and the housing  1140  at the connection therebetween. 
     In addition, when the bobbin  1110  rotates, the housing  1140  may also rotate. When the bobbin  1110  and the housing  1140  rotate, the upper elastic member  1150 , the lower elastic member  1160 , and the support member  1120  coupled thereto may be deformed, which may cause the breakage or plastic deformation of the upper elastic member  1150 , the lower elastic member  1160 , and the support member  1120 . As a result, the lens moving apparatus may be defective. 
     When the lens barrel LB 2  is rotated so as to be coupled to the bobbin  1110  by screw engagement, therefore, it is necessary to prevent the rotation of the bobbin  1110  in order to prevent the abrasion, breakage, or deformation of the bobbin  1110 , the housing  1140 , the upper elastic member  1150 , the lower elastic member  1160 , and the support member  1120 . 
     In order to prevent the rotation of the bobbin  1110  at the time of coupling the lens barrel LB 2 , a rotation preventing means  10  may be used. The rotation preventing means  10  may be, for example, a jig provided at an external apparatus for assembling the lens moving apparatus. 
     When the lens barrel LB 2  is coupled to the bobbin  1110  in the state in which the rotation preventing means  10  holds the bobbin  1110 , the rotation preventing means  10  prevents the rotation of the bobbin  1110 . Even when the lens barrel LB 2  is rotated so as to be coupled to the bobbin  1110  by screw engagement, therefore, the rotation of the bobbin  1110  may be prevented. 
     Consequently, it is necessary to configure the bobbin  1110  so as to have a structure in which the rotation preventing means  10  is coupled to the bobbin  1110  in order to hold the bobbin  1110  and in which the rotation preventing means  10  is easily separated from the bobbin  1110  after the coupling of the lens barrel LB 2 . 
     The structure in which the rotation preventing means  10  is separably coupled to the bobbin  1110  is the recess  1700  formed in the bobbin  1110 . That is, when the lens barrel LB 2  is rotated so as to be coupled to the bobbin  1110 , the rotation preventing means  10  may be coupled into the recess  1700 , whereby the rotation of the bobbin  1110  may be prevented. 
     As shown in  FIGS.  5  and  6   , the recess  1700  may be formed inward from the upper surface of the bobbin  1110 . Meanwhile, two or more recesses  1700  may be provided. 
     If one recess  1700  is provided and the lens barrel LB 2  is coupled to the bobbin  1110  in the state in which one rotation preventing means  10  is coupled into the recess  1700 , the bobbin  1110  may rotated about the recess  1700 . 
     In order to more stably and securely prevent the rotation of the bobbin  1110 , therefore, two or more recesses  1700  may be provided, and two or more rotation preventing means  10  may be coupled into the recesses  1700  in order to hold the bobbin  1110 . 
     Meanwhile, the recesses  1700  may be disposed so as to be symmetrical with respect to the center of the bobbin  1110 . In order to most securely and stably prevent the rotation of the bobbin  1110 , the bobbin  1110  may be held in a symmetrical fashion with respect to the center of the bobbin  1110 . 
     In order for the rotation preventing means  10  to hold the bobbin  1110  in a symmetrical fashion with respect to the center of the bobbin  1110 , therefore, the recesses  1700  may be disposed so as to be symmetrical with respect to the center of the bobbin  1110 . 
     In addition, two recesses  1700  may be formed in the upper surface of the bobbin  1110  so as to be symmetrical with respect to the center of the bobbin  1110 . 
     If three or more recesses  1700  are formed, the number of empty spaces in the bobbin  1110  formed by the recesses  1700  may increase, with the result that the mechanical strength of the bobbin  1110  is reduced, whereby the bobbin  1110  may be easily damaged by external impact. 
     In addition, since the lens moving apparatus according to the embodiment is an ultra-small apparatus, it may be difficult to secure space necessary to form a large number of recesses  1700  in the bobbin  1110 . 
     In addition, when the lens barrel LB 2  is coupled after the cover member  1300  is assembled in the lens moving apparatus according to the embodiment, the cover member  1300  must be provided at the parts thereof corresponding to the recesses  1700  with through-holes, through which the rotation preventing means  10  are inserted, or escape parts. 
     In this case, the size of the exposed region of the cover member  1300  may increase due to the formation of the through-holes or the escape parts. 
     Foreign matter may be introduced into the lens moving apparatus through the exposed region, and the introduced foreign matter may reduce the performance of the lens moving apparatus. Consequently, it may be reasonable to minimize the number of through-holes or escape parts formed in the cover member  1300 . 
     For the above reason, it is necessary to securely and stably prevent the rotation of the bobbin  1110  and to minimize the number of recesses  1700 , which may be achieved satisfied when the number of recesses is 2. 
     The two recesses  1700  may be disposed so as to be symmetrical with respect to the center of the bobbin  1110 , for the above reason. 
     In this embodiment, the recesses  1700  are formed in the bobbin  1110 , and the rotation preventing means  10  are coupled into the recesses  1700 . When the lens barrel LB 2  is rotated so as to be coupled to the bobbin  1110 , therefore, it is possible to effectively prevent the rotation of the bobbin  1110  due to friction between the lens barrel LB 2  and the bobbin  1110 . 
     Since the rotation of the bobbin  1110  is prevented, it is possible to greatly reduce abrasion of the bobbin  1110  and the housing  1140  or breakage of the bobbin  1110  and the housing  1140  due to friction between the lens barrel LB 2  and the bobbin  1110  at the connection therebetween. 
     Since the rotation of the bobbin  1110  is prevented, it is possible to effectively prevent the deformation of the upper elastic member  1150 , the lower elastic member  1160 , and the support member  1220  coupled to the bobbin  1110  and the housing  1140 . 
     Meanwhile, recesses may be formed in the housing  1140  so as to have a structure similar to the structure of the recesses  1700  formed in the bobbin  1110 . For example, two recesses may be formed in the housing  1140 , and the recesses may be disposed so as to be symmetrical with respect to the center of the housing  1140 . 
     However, when the assembly operation is performed in the sequence in which the housing  1140  is received in the cover member  1300  after the assembly apparatus is separated from the recesses formed in the housing  1140 , it may be unnecessary to provide separate escape parts or escape recesses for separating the assembly apparatus in the housing  1140 . 
       FIG.  7    is a partial sectional perspective view of  FIG.  5   .  FIG.  8 A  is a front view of  FIG.  7   . As shown in  FIGS.  7  and  8 A , a plurality of recesses  1700  may be provided, and the recesses  1700  may be disposed at positions corresponding to the corners of the housing  1140  at which the support members  1220  are disposed. 
     When the bobbin  1110  and the housing  1140  rotate, the support members disposed at the corners of the housing  1140  may be plastically deformed. 
     When the lens barrel LB 2  is coupled to the bobbin  1110  by screw engagement, therefore, it is necessary to more securely prevent the support members  1220  from being plastically deformed due to the rotation of the bobbin  1110 . 
     When the bobbin  1110  and the housing  1140  rotate, the parts having the smallest rotation angle are recesses  1700 , into which the rotation preventing means  10  are coupled. 
     In the case in which the recesses  1700  are disposed so as to be adjacent to the support members  1220 , therefore, it is possible to effectively prevent plastic deformation of the support members  1220  since the rotation angle is small even when the bobbin  1110  and the housing  1140  rotate. 
     In order to effectively prevent plastic deformation of the support members  1220 , therefore, the recesses  1700  may be disposed at positions corresponding to the corners of the housing  1140 . 
     In other words, the housing  1140  may generally have a quadrangular shape, and the recesses  1700  may be disposed along diagonal lines that connect the corners of the housing  1140 . 
     However, the disclosure is not limited thereto. In another embodiment, the recesses  1700  may be disposed at positions spaced apart from the diagonal line that connects the corners of the housing  1140 . In this case, the recesses  1700  may be disposed at positions adjacent to the diagonal line in the radial direction of the bobbin  1110 . 
     In the above structure, the support members  1220  and the rotation preventing means  10  may be disposed so as to be adjacent to each other, and the rotation of the bobbin  1110  and the housing  1140  may be minimized by the rotation preventing means  10 , whereby plastic deformation of the support members  1220  may be effectively prevented. 
     The coupling of the lens barrel LB 2  will be described with reference to  FIG.  8 A . First, the housing  1140  having the bobbin  1110  mounted therein is disposed on a worktable of a lens moving apparatus assembly apparatus (not shown). 
     At this time, the coupling of the lens barrel LB 2  may be performed after the cover member  1300  is assembled, or the cover member  1300  may be assembled after the coupling of the lens barrel LB 2  is completed. 
     Next, the ends of the rotation preventing means  10  are inserted into the recesses  1700  in order to hold the bobbin  1110 . At this time, the rotation preventing means  10  are inserted into the recesses  1700  in the state of being spaced apart from the bobbin  1110  so as to be coupled to the bobbin  1110 . 
     Of course, the rotation preventing means  10  serve to prevent the rotation of the bobbin  1110 . 
     Next, the lens barrel LB 2  is coupled to the screw thread SC formed in the inner circumferential surface of the bobbin  1110 . At this time, the lens barrel LB 2  is rotated so as to be coupled to the screw thread SC in the bobbin  1110 . 
     At this time, the rotation preventing means  1  may prevent the rotation of the bobbin  1110  due to friction between the lens barrel LB 2  and the bobbin  1110 . 
     After the coupling between the lens barrel LB 2  and the bobbin  1110  by screw engagement is completed, the rotation preventing means  10  are separated from the recesses  1700  and the bobbin  1110 . As shown in  FIG.  8 A , therefore, the rotation preventing means  10  may be configured to move upward and downward. 
       FIG.  8 B  is an enlarged sectional view showing a recess  1700  according to an embodiment. The bobbin  1110  may include a second stopper  1141 . The second stopper  1141  may protrude from the side surface of the housing  1140  so as to be opposite the lower surface of a corresponding one of the first stoppers  1112  in the first direction in order to prevent the bobbin  1110  from excessively moving downward in the first direction. That is, when the lower surface of the first stopper  1112  and the upper surface of the second stopper  1141  contact each other, the bobbin  1110  does not move downward any more. 
     Meanwhile, the lower surface of the first stopper  1112  and the upper surface of the second stopper  1141  may be spaced apart from each other by a first distance g 1  in the first direction at an initial position of the bobbin. Here, the initial position may be a position of the bobbin  1110  in the first direction in the state in which no current is supplied to the first coil  1120 . 
     A depth h 1  of the recess  1700  may be greater than a value obtained by adding the first distance g 1  to the drooping amount of the bobbin  1110  in the first direction due to the weight of the lens barrel LB 2  coupled to the bobbin  1110 . In other words, the depth h 1  of the recess  1700  may be equal to or greater than the downward stroke length of the bobbin  1110 . 
     In  FIG.  8 B , there is shown a structure in which the weight of the lens barrel LB 2  coupled to the bobbin  1110  is not considered. That is, the first distance g 1  may be, for example, 50 to 100 μm before the lens barrel LB 2  is assembled. In another embodiment, the first distance g 1  may be, for example, 50 to 100 μm even after the lens barrel LB 2  is assembled. 
     The following equation may be valid: First distance g 1  before lens barrel LB 2  is assembled=first distance g 1 ′ after lens barrel LB 2  is assembled+drooping amount of bobbin due to weight of lens barrel. 
     In addition, a second distance g 2 , which is a distance between the upper surface of the third projecting part  1111  and the lower surface of the cover member  1300 , may be, for example, about 250 μm. 
     After the lens barrel LB 2  is assembled to the lens moving apparatus, however, the bobbin  1110  may droop downward in the first direction due to the weight of the lens barrel LB 2 . Consequently, the depth h 1  of the recess  1700  is set in consideration of the drooping amount of the bobbin. The drooping amount of the bobbin may be, for example, 30 to 50 μm. That is, the position of the bobbin  1110  in the lens moving apparatus before the lens barrel LB 2  is assembled may be set in consideration of the drooping amount of the bobbin such that the first distance g 1 ′ is 50 to 100 μm by the drooping amount of the bobbin after the lens barrel LB 2  is assembled. 
     Consequently, the depth h 1  of the recess  1700  may be greater than the first distance g 1  or g 1 ′ such that the rotation preventing means  10  is inserted into the recess  1700  in order to stably hold the bobbin  1110 . 
     Meanwhile, the recess  1700  may be circular, and the diameter of the recess  1700  may be, for example, 0.3 to 0.6 mm. Alternatively, the diameter of the recess  1700  may be more than 0.6 mm. 
     In addition, the recess  1700  may be formed in a polygonal shape, such as a triangular shape, a quadrangular shape, a pentagonal shape, or a hexagonal shape. In this case, the length of each side of a polygon may be 0.3 to 0.6 mm or more than 0.6 mm. 
     The depth h 1  of the recess  1700  may be, for example, 0.3 mm or more. The depth h 1  of the recess  1700  may be 50% or more the diameter of the recess  1700 . In addition, the depth h 1  of the recess  1700  may be greater than the diameter of the recess  1700 . An upper diameter D 2  of the recess  1700  may be greater than a lower diameter D 1  of the recess  1700 . In this structure, the rotation preventing means  10  may be easily inserted into and separated from the recess  1700 . 
     In addition, as shown in  FIG.  8 B , the diameter of the recess may gradually increase from the lower part to the upper part thereof. In this structure, the rotation preventing means  10  may be easily inserted into and separated from the recess  1700 . 
       FIG.  9 A  is a plan view showing a lens moving apparatus according to another embodiment. The cover member  1300  may cover the bobbin  1100  while receiving the bobbin  1110 . As shown in  FIG.  9 A , escape recesses  1340  may be formed at positions corresponding to the recesses  1700 . 
     Specifically, the cover member may be provided with a through part  1330  corresponding to the inner circumference of the bobbin  1110 , and the through part  1330  may be recessed in order to form the escape recesses  1340 . 
     Referring to  FIG.  7   , the bobbin  1110  is configured to move relative to the housing  1140  in the first direction. For smooth movement of the bobbin  1110  in the first direction, therefore, it may be appropriate to reduce the sectional area of the bobbin  1110  when viewed in the first direction. 
     As shown in  FIG.  9 A , therefore, the escape recesses  1340  may be disposed so as to be adjacent to the through part  1330  formed in the center of the cover member  1300 , and the escape recesses  1340 , through which the rotation preventing means  10  are inserted, may be formed in the through part  1330  at positions corresponding to the recesses  1700  in the x-y plane. That is, the escape recesses  1340  may be disposed so as to overlap the recesses  1700  in the first direction. 
     In  FIG.  9 A , the escape recesses  1340  are provided so as to be symmetrical with respect to the diagonal line connecting the recesses  1700 , which is one of the diagonal lines connecting the corners of the housing  1140 . However, the disclosure is not limited thereto. The escape recesses  1340  may be provided in an asymmetrical fashion. 
     Meanwhile, foreign matter may be introduced into the lens moving apparatus through the through part  1330  including the escape recesses. In order to prevent the introduction of foreign matter, for example, an adhesive may be applied to the through part  1330 . 
     In another embodiment, a cover (not shown) for preventing the introduction of foreign matter may be disposed in front of the lens moving apparatus. 
       FIG.  9 B  is a view identical to  FIG.  9 A  except that the cover member  1300  is removed therefrom. As shown in  FIG.  9 B , the bobbin  1110  may include a first stopper  1112  protruding from the side surface of the bobbin  1110 . The first stopper  1112  may include a projecting region that contacts the housing  1140  to prevent the rotation of the bobbin  1110  relative to the housing  1140 . Here, the first stopper  1112  may be referred to as a first projecting portion. 
     The projecting region may be the first stopper  1112 , and a recess  1700  may be formed in at least a portion of the upper surface of the first stopper  1112 . In addition, at least a portion of the recess  1700  may be disposed in the first stopper  1112  or the projecting region. 
     The housing  1140  may have a recessed region formed at a position thereof corresponding to the first stopper  1112  while having a shape corresponding to the shape of the first stopper  1112 . 
     The first stopper  1112  may be disposed in the recessed region to prevent the rotation of the bobbin  1110  relative to the housing  1140 . 
     A plurality of first stoppers  1112  or projecting regions may be provided. The first stoppers  1112  may be disposed so as to be symmetrical with respect to the center of the bobbin  1110 . The recesses  1700  may be formed in at least some of the first stoppers  1112  or projecting regions. One recess  1700  may be formed in each of the first stoppers  1112  or projecting regions. At least some of the recesses  1700  may be disposed in the first stoppers  1112  or projecting regions. 
     In the embodiment shown in  FIG.  9 B , two first stoppers  1112  may be disposed so as to be symmetrical with respect to the center of the bobbin  1110 , and two recesses  1700  may also be disposed so as to be symmetrical with respect to the center of the bobbin  1110 . 
     The recesses  1700  may be formed by recessing the upper surface of the bobbin  1110 . The recesses  1700  may be formed over regions at which the first stoppers  1112  are formed and regions of the bobbin  1110  excluding the regions at which the first stoppers  1112  are formed. In another embodiment, in the case in which the first stoppers  1112  are large, the recesses  1700  may be formed only in the upper surfaces of the first stoppers  1112 . 
     The recesses  1700  may be disposed at positions having sufficient space, such as corners of the housing  1140 . Consequently, the first stoppers  1112  may also be disposed at the corners of the housing  1140 . 
     The bobbin may include 1-1 projection portions  1112 - 1  disposed so as to be spaced apart from the first stopper  1112  in the circumferential direction, and the upper surfaces of the first stopper  1112  may be higher than the upper surfaces of the 1-1 projection portions  1112 - 1 . The 1-1 projection portions  1112 - 1  may be stoppers, which may prevent the rotation of the bobbin  1110  relative to the housing  1140  together with the first stoppers  1112 . 
     As shown in  FIG.  9 B , the first stoppers  1112  or the projecting regions may be disposed at corresponding corners of the housing  1140 , and the 1-1 projection portions  1112 - 1  may be disposed at corresponding sides of the housing. 
     The upper elastic member  1150  may include an outer frame  1150 - 1  coupled to the housing  1140 , an inner frame  1150 - 2  coupled to the bobbin  110 , and a connection portion  1150 - 3  interconnecting the outer frame  1150 - 1  and the inner frame  1150 - 2 . 
     The connection portion  1150 - 3  may be disposed at the upper side of the 1-1 projection portions  1112 - 1 . Since the connection portion  1150 - 3  is elastically deformed, the connection portion  1150 - 3  may have sufficient space in the first direction. Consequently, the upper surfaces of the 1-1 projection portions  1112 - 1  may be lower than the upper surfaces of the first stoppers  1112  or the projecting regions such that space is defined above the 1-1 projection portions  1112 - 1  at which the connection portion  1150 - 3  is disposed. Consequently, the upper surfaces of the first stoppers  1112  or the projecting regions may be higher than the upper surfaces of the 1-1 projection portions  1112 - 1 . 
     Meanwhile, as shown in  FIG.  9 B , the recess  1700  may be exposed to the outside such that the rotation preventing means  10  can be inserted into and separated from the recess  1700 , and may be disposed so as not to impede the movement of the rotation preventing means  10  in the first direction. 
     Consequently, the outer frame  1150 - 1 , the inner frame  1150 - 2 , and the connection portion  1150 - 3  may not be disposed in the first direction of the recess  1700 . For example, as shown in  FIG.  9 B , the recess  1700  may be disposed so as to be surrounded by the outer frame  1150 - 1 , the inner frame  1150 - 2 , and the connection portion  1150 - 3  in the x-y plane, which is perpendicular to the first direction, and so as not to overlap the outer frame  1150 - 1 , the inner frame  1150 - 2 , and the connection portion  1150 - 3  in the first direction. The recess  1700  may be disposed between the inner frame  1150 - 2  and the connection portion  1150 - 3 . Alternatively, the connection portion  1150 - 3  and/or the outer frame  1150 - 1  may be disposed outside the recess  1700  from the center of the opening of the bobbin  110  in the radial diction 
     The bobbin may be provided on the upper surface thereof with a plurality of protrusions  1113 , to which the upper elastic member is coupled. Some of the protrusion  1113  and the recesses  1700  may be disposed in the same quarter surfaces in the x-y plane, which is perpendicular to the first direction. 
     In an xyz coordinate system, i.e. a three-dimensional rectangular coordinate system, the z axis may be an optical axis. 
     For example, referring to  FIG.  9 B , the recesses  1700  and the protrusions  1113  may be disposed in the first quarter surface {circle around ( 1 )} and the third quarter surface {circle around ( 3 )} in the x-y plane, which is perpendicular to the first direction, i.e. z axis, but no recesses  1700  may be disposed in the second quarter surface {circle around ( 2 )} and the fourth quarter surface {circle around ( 4 )}. 
       FIG.  9 C  is a view showing another embodiment of  FIG.  9 B . Hereinafter, a description of a structure that is identical to the above structure will be omitted. As shown in  FIG.  9 C , the lens moving apparatus may include a displacement sensing unit  1800  and a third magnet  1900 . 
     The displacement sensing unit  1800  may be mounted to the bobbin and the housing to sense the displacement of the bobbin in the first direction. The displacement sensing unit  1800  may include a second magnet  1810 , a position sensor  1820 , and a sensor board  1830 . 
     The second magnet  1810  may be disposed at the side surface of the bobbin  1110  so as to be movable with the bobbin  1110  when the bobbin  1110  moves in the first direction. 
     The position sensor  1820  may be disposed at the housing so as to be opposite the second magnet  1810 . The position sensor  1820  may sense a change in a magnetic field due to the movement of the second magnet  1810  in the first direction to measure the displacement of the bobbin  1110  in the first direction. The position sensor  1820  may be, for example, a Hall sensor. 
     The sensor board  1830  may be disposed at the housing  1140 , and the position sensor  1820  may be mounted on the sensor board  1830 . The position sensor  1820  may receive external current through the sensor board  1830 , and may transmit a sensed signal to an external controller. 
     The third magnet  1900  may be disposed at the bobbin  1110  so as to be symmetrical with the second magnet  1810  with respect to the center of the bobbin  1110 . 
     When the second magnet  1810  is disposed at one side of the bobbin  1110 , the bobbin may not smoothly move in the first direction due to the weight of the second magnet  1810 . The balance in load between the third magnet  1900  and the second magnet  1810  may be kept such that bobbin can smoothly move in the first direction. Meanwhile, the lens moving apparatus according to the embodiment may be used in various fields, e.g. for a camera module. For example, the camera module may be used in a mobile device, such as a mobile phone. 
     A camera module according to an embodiment may include a lens barrel LB 2  coupled to the bobbin  1110  and an image sensor (not shown). The lens barrel LB 2  may include at least one lens for transmitting an image to the image sensor. 
     In addition, the camera module may further include an infrared cutoff filter (not shown). The infrared cutoff filter serves to prevent infrared light from being incident on the image sensor. 
     In this case, the infrared cutoff filter may be provided at the base  1210  shown in  FIG.  2    at a position thereof corresponding to the image sensor. The infrared cutoff filter may be coupled to a holder member (not shown). In addition, the holder member may support the lower side of the base  1210 . 
     The base  1210  may be provided with a separate terminal member for electrical conduction with the printed circuit board  1250 , or a terminal may be integrally formed using a surface electrode. Also, in the case in which the lens moving apparatus includes a separate board, no separate terminal member may be provided. 
     Meanwhile, the base  1210  may serve as a sensor holder for protecting the image sensor. In this case, a projecting part may be formed downward along the side of the base  1210 , which, however, is not requisite. Although not shown, a separate sensor holder may be disposed under the base  1210 . 
       FIG.  10    is a perspective view schematically showing a lens moving apparatus according to another embodiment.  FIG.  11 A  is an exploded perspective view showing the lens moving apparatus according to the embodiment. 
     An auto-focusing apparatus applied to a small-sized camera module in a mobile device, such as a smartphone or a tablet PC, is an apparatus that automatically focuses an image of a subject on the surface of an image sensor (not shown). The auto-focusing apparatus may be variously configured. In this embodiment, an optical module, including a plurality of lenses, may be moved in the first direction in order to perform an auto-focusing operation. 
     As shown in  FIG.  11 A , the lens moving apparatus according to the embodiment may include a moving unit and a stationary unit. The moving unit may perform an auto-focusing function. The moving unit may include a bobbin  110  and a first coil  120 . The stationary unit may include a first magnet  130 , a housing  140 , an upper elastic member  150 , and a lower elastic member  160 . 
     The bobbin  110  may be mounted in the housing  140  so as to move in the first direction. The first coil  120 , which is disposed in the first magnet  130 , may be provided on the outer circumferential surface of the bobbin  110 . The bobbin  110  may be mounted in the housing  140  so as to reciprocate in the first direction through electromagnetic interaction between the first magnet  130  and the first coil  120 . The first coil  120  may be provided on the outer circumferential surface of the bobbin  110  so as to electromagnetically interact with the first magnet  130 . 
     In addition, the bobbin  110  may move in the first direction in order to perform the auto-focusing function while being elastically supported by the upper and lower elastic members  150  and  160 . 
     The bobbin  110  may include a lens barrel LB (see  FIG.  16   ), in which at least one lens is mounted. The lens barrel LB may be coupled in the bobbin  110  in various manners. 
     For example, a female screw thread may be formed in the inner circumferential surface of the bobbin  110 , and a male screw thread corresponding to the female screw thread may be formed in the outer circumferential surface of the lens barrel LB such that the lens barrel LB is coupled to the bobbin  110  by screw engagement. 
     However, the disclosure is not limited thereto. No screw thread may be formed in the inner circumferential surface of the bobbin  110 , in which case the lens barrel LB may be directly fixed to the inside of the bobbin  110  using a method other than screw engagement. Alternatively, one or more lenses may be integrally formed with the bobbin  110  without the lens barrel LB. In this embodiment, however, the lens barrel LB and the bobbin  110  are coupled using an adhesive. 
     One lens may be coupled to the lens barrel LB, or two or more lenses may be provided in order to constitute an optical system. 
     The auto-focusing function may be controlled by varying the direction of current and/or the amount of current. The bobbin  110  may move in the first direction in order to perform the auto-focusing function. 
     For example, when forward current is supplied, the bobbin  110  may move upward from the initial position thereof. When reverse current is supplied, the bobbin  110  may move downward from the initial position thereof. Alternatively, the amount of current in one direction may be adjusted to increase or decrease the movement distance of the bobbin  110  in the direction from the initial position thereof. 
     The bobbin  110  may be provided on the upper surface and the lower surface thereof with a plurality of upper support protrusions and a plurality of lower support protrusions, respectively. The upper support protrusions may be formed in a cylindrical shape or in a prism shape. The upper support protrusions may be coupled and fixed to the upper elastic member  150  in order to guide the upper elastic member  150 . 
     The lower support protrusions may be formed in a cylindrical shape or in a prism shape, in the same manner as the upper support protrusions. The lower support protrusions may be coupled and fixed to the lower elastic member  160  in order to guide the lower elastic member  160 . 
     The upper elastic member  150  may be provided at the upper side of the bobbin  110 , and the lower elastic member  160  may be provided at the lower side of the bobbin  110 . The upper elastic member  150  and the lower elastic member  160  may be coupled to the bobbin  110  and the housing  140 , respectively. The upper elastic member  150  may be provided with through holes and/or recesses corresponding to the upper support protrusions, and the lower elastic member  160  may be provided with through holes and/or recesses corresponding to the lower support protrusions. 
     The support protrusions may be fixedly coupled to the through holes and/or the recesses by thermal fusion or using an adhesive member, such as epoxy. 
     The housing  140  may be formed in the shape of a hollow pillar for supporting the first magnet  130 . The housing  140  may have an approximately quadrangular shape, and may be disposed in a cover member  300 . The first magnet  130  may be coupled to the side surface of the housing  140 . 
     In addition, as described above, the bobbin  110 , which is guided by the upper and lower elastic members  150  and  1160  so as to move in the first direction, may be mounted in the housing  140 . 
     In this embodiment, the first magnet  130  may have a bar shape, and may be coupled to or disposed at the side of the housing  140 . In another embodiment, the first magnet  130  may have a trapezoidal shape, and may be coupled to or disposed at the corner of the housing  140 . 
     Meanwhile, a single first magnet  130  may be provided, or two or more first magnets  130  may be provided. In addition, a plurality of first magnets may be arranged in the first direction so as to have a multi-layered structure. 
     The upper elastic member  150  and the lower elastic member  160  may elastically support the upward and/or downward movement of the bobbin  110  in the first direction. Each of the upper elastic member  150  and the lower elastic member  160  may be, for example, a leaf spring. 
     As shown in  FIG.  11 A , the upper elastic member  150  may be divided into two parts. Consequently, currents having different polarities and different powers may be supplied to the divided parts of the upper elastic member  150 , or may be transmitted through the divided parts of the upper elastic member  150 . 
     In a modification, the lower elastic member  160  may be divided into two parts, and the upper elastic member  150  may have a single structure. 
     Meanwhile, the upper elastic member  150 , the lower elastic member  160 , the bobbin  110 , and the housing  140  may be assembled by thermal fusion and/or bonding using an adhesive. At this time, thermal fusion may be performed, and then bonding using the adhesive may be performed. 
     A base  210  may be disposed at the lower side of the bobbin  110  and a printed circuit board  250 , and may have an approximately quadrangular shape. The printed circuit board  250  may be located on the base  210 . The base  210  may be provided in the surface thereof that faces the part of the printed circuit board  250  at which a terminal surface  253  is formed with a support recess having a size corresponding to the size of the part of the printed circuit board  250  at which the terminal surface  253  is formed. In addition, the base  210  may be disposed at the lower side of the housing  140  so as to be coupled to the cover member  300 . 
     The support recess may be formed inward from the outer circumferential surface of the base  210  by a predetermined depth in order to prevent the part of the printed circuit board  250  at which the terminal surface  253  is formed from protruding outward or to adjust the extent of protrusion of the part of the printed circuit board  250  at which the terminal surface  253  is formed. 
     A support member  220  may be disposed at the corner of the housing  140 . The upper side of the support member  220  may be coupled and connected to the upper elastic member  150 , and the lower side of the support member  220  may be coupled to the base  210  and to a board including the printed circuit board  250  and a circuit member  231 . The support member  220  may support the bobbin  110  and the housing  140  such that the bobbin  110  and the housing  140  can move in the second direction and/or the third direction, which are perpendicular to the first direction. In addition, the support member  1220  may be connected to the first coil  1120 . 
     The support member  220  may be disposed at the corner of the housing  140  so as to elastically support the housing  140 . A plurality of support members  220  may be provided. In this embodiment, four support members  220  may be disposed at respective corners of the housing  140 . The support member  220  may be made of an elastic material such that the bobbin  110  and the housing  140  can move in the x-y plane. 
     In another embodiment, six support members may be provided such that two support members are disposed at each of two corners and one support member is disposed at each of the remaining two corners. Depending on the circumstances, a total of seven or more support members may be provided. 
     In addition, the support member  220  may be connected to the upper elastic member  150 . For example, the support member  220  may be connected to the part of the upper elastic member  150  in which the through holes are formed. 
     In addition, since the support member  220  is formed separably from the upper elastic member  150 , the support member  220  may be connected to the upper elastic member  150  by a conductive adhesive, soldering, or welding. Consequently, the upper elastic member  150  may supply current to the first coil  120  via the support member  220 . 
     The lower part of the support member may be inserted into a through hole formed in the board including the circuit member  231  and the printed circuit board  250  and may be coupled to the board by soldering. That is, the lower part of the support member  220  may be inserted into and soldered to the through hole formed in the circuit member  231  and/or the printed circuit board  250 , whereby the support member  220  may be connected to the board. 
     Alternatively, no through hole may be formed in the circuit member  231  and/or in the printed circuit board  250 , and the support member  220  may be soldered to a corresponding part of the circuit member  231 . 
     In  FIG.  11 A , a linear support member  220  is shown as an embodiment. However, the disclosure is not limited thereto. For example, the support member  220  may be formed in the shape of a sheet member. 
     The second coil  230  may move the housing  140  in the second direction and/or the third direction through electromagnetic interaction with the first magnet  130 , and the support member  220  may be elastically deformed, whereby optical image stabilization may be performed. 
     Here, the second and third directions may include directions that are substantially close to the x-axis direction (or the first direction) and the y-axis direction (or the second direction), in addition to the x-axis direction and the y-axis direction. That is, in this embodiment, the housing  140  may move parallel to the x-axis and the y-axis. In addition, when the housing  140  moves while being supported by the support member  220 , the housing  140  may move in the state of being slightly inclined relative to the x-axis and the y-axis. 
     Consequently, it is necessary to mount the first magnet  130  to a position corresponding to the second coil  230 . 
     The second coil  230  may be disposed so as to be opposite the first magnet  130  fixed to the housing  140 . In an embodiment, the second coil  230  may be disposed outside the first magnet  130 . Alternatively, the second coil  230  may be disposed at the lower side of the first magnet  130  so as to be spaced apart from the first magnet  130  by a predetermined distance. Alternatively, the second coil  230  may be disposed at the lower side of the housing  140  so as to be opposite the first magnet  130 . 
     In this embodiment, four second coils  230  may be disposed at four sides of the circuit member  231 . However, the disclosure is not limited thereto. Only one second coil may be provided for the second direction, and only one second coil may be provided for the third direction. Alternatively, more than four second coils may be provided. 
     Alternatively, one second coil may be provided at the first side for the second direction, two second coils may be provided at the second side for the second direction, one second coil may be provided at the third side for the third direction, and two second coils may be provided at the fourth side for the third direction. That is, a total of six second coils may be provided. In this case, the first side and the fourth side may be adjacent to each other, and the second side and the third side may be adjacent to each other. 
     In this embodiment, a circuit pattern corresponding to the shape of the second coil  230  may be formed on the circuit member  231 . Alternatively, a separate second coil may be disposed on the circuit member  231 . However, the disclosure is not limited thereto. A circuit pattern corresponding to the shape of the second coil  230  may be directly formed on the circuit member  231 . 
     Alternatively, a wire is wound in the shape of a doughnut in order to form the second coil  230 . Alternatively, the second coil  230  may be formed in the shape of an FP coil, which may be connected to the printed circuit board  250 . 
     The circuit member  231  including the second coil  230  may be mounted or disposed at the upper surface of the printed circuit board  250 , which is disposed at the upper side of the base  210 . However, the disclosure is not limited thereto. The second coil  230  may be in tight contact with the base  210 , or may be spaced apart from the base  210  by a predetermined distance. The second coil  230  may be formed on a separate board, which may be stacked on and connected to the printed circuit board  250 . 
     The board may be disposed between the housing  140  and the base  210 , and may include the circuit member  231  and the printed circuit board  250 . The circuit member  231  and the printed circuit board  250  may be connected to each other. 
     The circuit member  231  may be provided with the second coil  230 , which is disposed so as to be opposite the first magnet  130 . The circuit member  231  may be disposed at the upper side of the printed circuit board  250 . 
     The printed circuit board  250  may be disposed at the lower side of the circuit member  231 , may be connected to at least one of the upper and lower elastic members  150  and  160 , and may be coupled to the upper surface of the base  210 . The printed circuit board  250  may be provided at a position thereof corresponding to the end of the support member  220  with a through hole, into which the support member  220  is inserted. Alternatively, no through hole may be formed, and the printed circuit board may be connected or bonded to the support member. 
     In another embodiment, when the support member  220  is coupled to the circuit member  231 , the printed circuit board  250  may be provided at the corner thereof corresponding to the support member  220  with an escape portion for easy coupling, such as soldering, between the support member  220  and the circuit member  231 . 
     The printed circuit board  250  may be coupled to the upper surface of the base  210 , may be disposed at the lower side of the circuit member  231 , and may be connected to the circuit member  231 . The printed circuit board  250  may be provided with a terminal surface  253 , which is disposed at the side surface of the base  210  and on which a terminal  251  is disposed. In this embodiment, the printed circuit board  250  has two bent terminal surfaces  253 . 
     A plurality of terminals  251  may be disposed on the terminal surface  253  in order to supply current from an external power source to the first coil  120  and the second coil  230 . The number of terminals  251  formed on the terminal surface  253  may be changed depending on the kind of components to be controlled. In addition, the printed circuit board  250  may have one terminal surface  253 . Alternatively, the printed circuit board  250  may have two or more terminal surfaces  253 . 
     The cover member  300  may be formed in the shape of a box having corners. The cover member  300  may receive the moving unit, the second coil  230 , and a portion or the entirety of the printed circuit board  250 , and may be coupled to the base  210 . The cover member  300  protects the moving unit, the second coil  230 , and the printed circuit board  250  received therein so as to protect the same from damage. 
     In addition, the cover member  300  may prevent an electromagnetic field generated by the first magnet  130 , the first coil  120 , and the second coil  230  received therein from leaking to the outside in order to condense the electromagnetic field. 
       FIG.  11 B  is an exploded perspective view showing a lens moving apparatus according to another embodiment different from  FIG.  11 A . Compared to  FIG.  11 A , the lens moving apparatus according to the embodiment shown in  FIG.  11 B  may not include the support member  220 , the second coil  230 , and the circuit member  231 . 
     Consequently, the lens moving apparatus according to the embodiment shown in  FIG.  11 B  may not perform an optical image stabilization function but may perform an auto-focusing function. The other constructions of the lens moving apparatus excluding the support member  220 , the second coil  230 , and the circuit member  231  have already been described with reference to  FIG.  11 A , and a duplicate description thereof will be omitted. 
     Hereinafter, the structures of the bobbin  110  and the housing  140  will be described in more detail with reference to  FIGS.  12  and  13   .  FIG.  12    is a perspective view showing a bobbin  1110  according to another embodiment. 
     The bobbin  110  may include a protrusion  113  and a third projecting part  111 . The protrusion  113  is a portion that is coupled into the through hole formed in the upper elastic member  150 . The protrusion  113  may be formed in a cylindrical shape or any of various other shapes. The protrusion  113  may guide the upper elastic member  150  such that the upper elastic member  150  is coupled to the bobbin  110 . 
     The third projecting part  111  may be formed on the upper surface of the bobbin  110 . When external impact is applied, the upper surface of the third projecting part  111  may collide with the lower surface of the cover member  300  in order to prevent plastic deformation exceeding the elastic limit of a spring. 
     In the case in which the initial position of the bobbin  110  is set to the position at which the bobbin  110  cannot move downward any further, auto-focusing of the bobbin  110  may be controlled in one direction. That is, the bobbin  110  moves upward when the amount of current that is supplied to the first coil  120  increases, and the bobbin  110  moves downward to the initial position thereof when the amount of current that is supplied to the first coil  120  decreases, whereby the auto-focusing function may be performed. 
     However, in the case in which the initial position of the bobbin  110  is set to provide a distance by which the bobbin  110  can move downward, the auto-focusing of the bobbin  110  may be controlled in opposite directions. That is, the bobbin  110  may move upward or downward in the first direction, whereby the auto-focusing function may be performed. 
     For example, when forward current is supplied, the bobbin  110  may move upward. When reverse current is supplied, the bobbin  110  may move downward. 
       FIG.  13    is a perspective view showing a housing  140  according to another embodiment. The housing  140  may support the magnet  130 , and may receive therein the first bobbin  110 , which moves in the first direction. 
     The housing  140  may be generally formed in the shape of a hollow pillar. For example, the housing  140  may have a polygonal hollow part (e.g. a quadrangular or octagonal hollow part) or a circular hollow part. 
     The housing  140  may include a second upper support protrusion  143  and a fourth projecting part  144 . The second upper support protrusion  143  is a portion that is coupled into the through hole formed in the upper elastic member  150 . The second upper support protrusion  143  may be formed in a cylindrical shape or any of various other shapes. The second upper support protrusion  143  may guide the upper elastic member  150  such that the upper elastic member  150  is coupled to the housing  140 . 
     The fourth projecting part  144  may be formed on the upper surface of the housing  140 . The fourth projecting part  144  may serve to stop the cover member  300  and the housing  140 . That is, when external impact is applied, the upper surface of the fourth projecting part  144  may collide with the lower surface of the cover member  300  in order to prevent the cover member  300  and the housing  140  from directly colliding with each other. 
     The housing  140  may be provided with a third recessed part  148  at a position thereof corresponding to the part of the bobbin  110  at which a first width W 1  is formed. 
     The surface of the third recessed part  148  in the housing  140  opposite the bobbin  110  may have a shape that matches the first width W 1 , which is the projecting part of the bobbin  110 . Each of the first width W 1  of the bobbin  110  shown in  FIG.  12    and a second width W 2  of the third recessed part  148  in the housing  140  shown in  FIG.  13    may have a predetermined tolerance. 
     Since the third recessed part  148  is disposed so as to match the first width W 11  of the bobbin  110 , the bobbin  110  may be prevented from rotating relative to the housing  140 . Even when force for rotating the bobbin  110  about an optical axis or an axis parallel to the optical axis is applied to the bobbin  110 , therefore, the third recessed part  148  in the housing  140  may prevent the rotation of the bobbin  110 . 
     In addition, the housing  140  may be provided in the corner thereof with a second recessed part  147 . The support member  220  may extend through the second recessed part  147  in the first direction so as to be connected to the upper elastic member  150 . 
     A pair of second recessed parts  147  may be provided at each corner of the housing  140 . In this embodiment, the support member  220  may be disposed so as to extend through one of the second recessed parts  147  formed in one corner of the housing  140 . 
     In another embodiment, a single second recessed part  147  may be provided at each corner of the housing  140 . For example, referring to  FIG.  15   , the second recessed part  147  may be formed in the left upper side of each corner of the housing  140  through which the support member  220  extends, rather than in the right lower side of the corner of the housing  140 . 
     In a further embodiment, a through-hole, through which the support member extends, may be formed in each corner of the housing  140 , instead of the second recessed part  147 . A single through-hole or a pair of through-holes may be formed in each corner of the housing, in the same manner as the second recessed part  147 . 
     Meanwhile, the housing  140  may be provided at the lower surface of the corner thereof with a lower support protrusion (not shown) for coupling with the lower elastic member  160 . The lower support protrusion may be provided at a position corresponding to the upper support protrusion while having a shape corresponding to the shape of the upper support protrusion. However, the disclosure is not limited thereto. 
     The housing  140  may be provided with a plurality of third stoppers  149  protruding from the respective sides thereof. The third stoppers  149  may serve to prevent the housing  140  from colliding with the cover member  300  when the housing  140  moves in the second and third directions. 
       FIG.  14    is a perspective view of the bobbin  110 , illustrating an application extension region according to an embodiment.  FIG.  15    is an enlarged view showing part A of  FIG.  14   . As shown in  FIGS.  14  and  15   , the application extension region may be formed at the bobbin  110  in the lens moving apparatus according to the embodiment. 
     In the lens moving apparatus according to the embodiment, a lens barrel LB may be provided, and the lens barrel LB may be coupled to the bobbin  110  using an adhesive. 
     The application extension region may serve to increase the area of the adhesive that is applied to the region of the bobbin  110  at which the lens barrel LB is coupled to the bobbin  110 . The application extension region may be formed at the edge of the bobbin, whereby the application extension region may be referred to as an edge region. 
     Referring to  FIG.  18   , a description of which will follow, a bonding part BD, to which an adhesive is applied, may be formed between the upper part of the inner circumference of the bobbin  110  and the outer circumference of the lens barrel LB. The bobbin  110  and the lens barrel LB may be coupled to each other by the bonding part BD. 
     The adhesive, which couples the bobbin  110  and the lens barrel LB to each other, may peel off from the lens barrel LB when external impact is applied after the adhesive is hardened. 
     For example, when external impact is applied to the hardened adhesive, the adhesive may crack. As the lens moving apparatus is continuously used, external impact may be continuously and uninterruptedly applied to the hardened adhesive. 
     Cracks generated in the adhesive may grow due to continuous and uninterrupted external impact. Eventually, the adhesive may peel off from the adhesive region of the bobbin  110  and the lens barrel LB due to the cracks. 
     When the adhesive peels off, pieces of the adhesive that has peeled off may be introduced into the respective components of the lens moving apparatus, with the result that the lens moving apparatus may be damaged. 
     At worst, the lens barrel LB may be separated from the bobbin  110  due to the peeling off of the adhesive, with the result that the lens moving apparatus may be damaged to the extent that the lens moving apparatus cannot operate. 
     In order to solve the above problem, it is necessary for the adhesive to have sufficient adhesive force to resistant peeling off even when continuous and uninterrupted external impact is applied. 
     In this embodiment, the application extension region may be formed at the bobbin  110  in order to increase the adhesive force of the adhesive, which couples the bobbin  110  and the lens barrel LB, with respect to the bobbin  110 . As described above, the application extension region may serve to increase the area of the adhesive that is applied. 
     When the same adhesive is used, the adhesive force of the adhesive may increase in proportion to the area of the adhesive that is applied. Consequently, the application extension region may be formed as, for example, an inclined surface  710 . 
     That is, as shown in  FIGS.  14  and  15   , the application extension region may include an inclined surface  710  that is formed on the upper part of the inner circumferential surface of the bobbin  110  so as to be inclined with respect to the first direction. The inclined surface  710  may be generally formed along the inner circumference of the bobbin  110  in a ring shape. 
     In addition, as shown in  FIG.  14   , the inclined surface  710  may be disposed so as to surround the lens barrel LB in the x-y plane, which is perpendicular to the first direction. 
     If the inclined surface  710  is not provided, most of the adhesive is applied to the upper end of the inner circumference of the bobbin  110 , i.e. an upper plane surface  720 . Since a gap defined between the inner circumferential surface of the bobbin  110  and the lens barrel LB is very small, the adhesive hardly flows to the inner circumferential surface of the bobbin  110  through the gap. 
     As a result, most of the adhesive is applied to the upper plane surface  720  of the bobbin  110  and the outer circumferential surface of the lens barrel LB, which are perpendicular to each other, whereby the coupling force of the adhesive to the bobbin  110  and the lens barrel LB may be low after the adhesive has hardened. 
     In the case in which the inclined surface  710  is formed, as in this embodiment, the adhesive may be applied to the upper plane surface  720  and the inclined surface  710  of the bobbin  110 . In addition, the adhesive may also be applied to the outer circumferential surface of the lens barrel LB corresponding to the height of the inclined surface  710  in the first direction. 
     As the inclined surface  710  is formed at the bobbin  110 , therefore, the adhesive may be applied to the upper plane surface  720 , the inclined surface  710  of the bobbin  110 , and the outer circumferential surface of the lens barrel LB corresponding to the height of the inclined surface  710  in the first direction. Consequently, the area of the adhesive that is applied may greatly increase compared to the case in which the inclined surface  710  is not formed. 
     As a result of an increase in the area of the adhesive that is applied, the adhesive force of the adhesive to the bobbin  110  and the lens barrel LB greatly increases, whereby the feeling off of the adhesive due to external impact may be effectively prevented. 
     Meanwhile, as shown in  FIGS.  14  and  15   , the application extension region may include a plurality of recesses  711  formed by recessing a portion of the inclined surface  710 . 
     A portion of each recess  711  may be formed in the inclined surface  710  of the bobbin  110  and the remainder of each recess  711  may be formed in the upper plane surface  720  of the bobbin  110 , whereby the recesses  711  may be formed over the inclined surface  710  and the upper plane surface  720  of the bobbin  110 . 
     When the adhesive is applied to the upper plane surface  720  and the inclined surface  710 , the adhesive may be introduced into the recesses  711 , whereby the area of the adhesive that is applied to the bobbin  110  may increase. As the area of the adhesive that is applied to the bobbin  110  increases due to the recesses  711 , the coupling force of the adhesive to the bobbin  110  may increase. 
     The recesses  711  may be disposed so as to be symmetrical with respect to the center of the bobbin  110 , and may be arranged at predetermined intervals. The size of each recess  711  and the distance between the recesses  711  may be appropriately chosen in consideration of the overall structure and size of the lens moving apparatus and the required coupling force of the adhesive. 
       FIG.  16    is a plan view showing the lens moving apparatus according to the embodiment.  FIG.  17    is a sectional view showing the lens moving apparatus according to the embodiment.  FIG.  18    is an enlarged view showing part B of  FIG.  17   . 
     Referring to  FIG.  16   , in the case in which the lens barrel LB is inserted into the inner circumference of the bobbin  110 , the inclined surface  710 , the upper plane surface  720 , and the recesses  711  may be disposed so as to surround the lens barrel LB. 
     The adhesive is applied and hardened to the inclined surface  710 , the upper plane surface  720 , and the recesses  711  and to the outer circumferential surface of the lens barrel LB corresponding thereto, whereby the lens barrel LB is coupled to the bobbin  110 . 
     As the adhesive is applied and hardened to the lens barrel LB and the bobbin  110 , as shown in  FIG.  18   , a bonding part BD, by which the lens barrel LB is coupled to the bobbin  110 , may be formed. 
     For example, a UV-curable adhesive, epoxy, or a thermosetting adhesive may be used as the adhesive that forms the bonding part BD. 
     One side of the bonding part BD may be bonded to the inclined surface  710 , the upper plane surface  720 , and the recesses  711  of the bobbin  110 , and the other side may be bonded to the outer circumferential surface of the adhesive. 
     In particular, as the inclined surface  710  is formed at the bobbin  110 , the bonding part BD may be easily bonded to the outer circumferential surface of the lens barrel LB corresponding to the height of the inclined surface  710  in the first direction. 
     That is, the inclined surface  710  extends the region to which the adhesive is applied on the outer circumferential surface of the lens barrel LB as well as the bobbin  110 , whereby the adhesion area of the bonding part BD on the outer circumferential surface of the lens barrel LB formed by the adhesive may increase. 
     As the adhesion area of the bonding part BD on the outer circumferential surface of the lens barrel LB increases, the coupling force of the bonding part BD to the lens barrel LB may considerably increase. 
       FIG.  19    is a perspective view of the bobbin  110 , illustrating an application extension region according to another embodiment.  FIG.  20    is an enlarged view showing part C of  FIG.  19   . 
     As shown in  FIGS.  19  and  20   , the application extension region may include a plurality of bosses  712 , a portion of each of which protrudes from the inclined surface  710 . 
     For example, a portion of each of the bosses  712  may be located on the inclined surface  710 , and the remainder of each of the bosses  712  may be located in the upper plane surface  720  of the bobbin  110 , whereby the bosses  712  may be formed over the inclined surface  710  and the upper plane surface  720  of the bobbin  110 . 
     The bosses  712  may increase the area of the adhesive that is applied, in the same manner as the recesses  711 . That is, when the adhesive is applied to the upper plane surface  720  and the inclined surface  710 , the adhesive may be applied to the surfaces of the bosses  712 , whereby the area of the adhesive that is applied to the bobbin  110  may increase. 
     As the area of the adhesive that is applied to the bobbin  110  increases due to the bosses  712 , the coupling force of the adhesive to the bobbin  110  may increase. 
     Meanwhile, the bosses  712  may be disposed so as to be symmetrical with respect to the center of the bobbin  110 , and may be arranged at predetermined intervals. The size of each boss  712  and the distance between the bosses  712  may be appropriately chosen in consideration of the overall structure and size of the lens moving apparatus and the required coupling force of the adhesive. 
       FIG.  21    is a perspective view of the bobbin  110 , illustrating an application extension region according to a further embodiment.  FIG.  22    is an enlarged view showing part D of  FIG.  21   . 
     As shown in  FIGS.  21  and  22   , the application extension region may include a step  713  formed on the inclined surface  710 . For example, a plurality of steps  713  may be provided in the lateral direction of the inclined surface  710 . 
     The steps  713  may increase the area of the adhesive that is applied, in the same manner as the recesses  711  or the bosses  712 . 
     That is, when the adhesive is applied to the inclined surface  710 , on which the steps  713  are formed, the adhesive may be applied to the vertical surfaces and the horizontal surfaces of the steps  713 , whereby the area of the adhesive that is applied to the bobbin  110  may increase. 
     As described above, the steps  713  may be provided in the lateral direction of the inclined surface  710 . The number of steps  713  and the width of each step  713  may be appropriately chosen in consideration of the overall structure and size of the lens moving apparatus and the required coupling force of the adhesive. 
     In the above embodiment, the application extension region forms the inclined surface  710 , and the inclined surface  710  may increase the area of the adhesive that is applied to the bobbin  110  and the lens barrel LB. As the area of the adhesive that is applied increases, the coupling force of the adhesive for coupling the bobbin  110  and the lens barrel LB to each other may increase. 
     In addition, the application extension region may include the recesses  711 , the bosses  712 , or the steps  713 , which may increase the area of the adhesive that is applied together with the inclined surface  710 . Consequently, the coupling force of the adhesive for coupling the bobbin  110  and the lens barrel LB to each other may increase. 
     In addition, as the coupling force of the adhesive increases, the adhesive may be prevented from feeling off even when external impact is continuously and uninterruptedly applied to the lens moving apparatus, whereby damage to the lens moving apparatus may be prevented. 
     Meanwhile, the lens moving apparatus according to the embodiment described above may be used in various fields, e.g. for a camera module. For example, the camera module may be applied to a mobile device, such as a mobile phone. 
     A camera module according to an embodiment may include a lens barrel LB coupled to the bobbin  110  and an image sensor (not shown). The lens barrel LB may include at least one lens for transmitting an image to the image sensor. 
     In addition, the camera module may further include an infrared cutoff filter (not shown). The infrared cutoff filter serves to prevent infrared light from being incident on the image sensor. 
     In this case, the infrared cutoff filter may be provided at the base  210  shown in  FIG.  11 A  at a position thereof corresponding to the image sensor. The infrared cutoff filter may be coupled to a holder member (not shown). In addition, the holder member may support the lower side of the base  210 . 
     The base  210  may be provided with a separate terminal member for electrical conduction with the printed circuit board  250 , or a terminal may be integrally formed using a surface electrode. Also, in the case in which the lens moving apparatus includes a separate board, no separate terminal member may be provided. 
     Meanwhile, the base  210  may serve as a sensor holder for protecting the image sensor. In this case, a projecting part may be formed downward along the side of the base  210 , which, however, is not requisite. Although not shown, a separate sensor holder may be disposed under the base  210 . 
       FIG.  23    is a perspective view showing a portable device  200 A according to an embodiment.  FIG.  24    is a block diagram of the portable device  200 A shown in  FIG.  23   . 
     Referring to  FIGS.  23  and  24   , the portable device  200 A (hereinafter, referred to as the “device”) may include a main body  850 , a wireless communication unit  710 , an audio/video (A/V) input unit  720 , a sensing unit  740 , an input/output unit  750 , a memory unit  760 , an interface unit  770 , a controller  780 , and a power supply unit  790 . 
     Various kinds of electronic parts of the device may be mounted in a space defined between a front case  851  and a rear case  852  of the main body  850 . 
     The wireless communication unit  710  may include a broadcast receiving module  711 , a mobile communication module  712 , a wireless Internet module  713 , a near field communication module  714 , and a location information module  715 . 
     The A/V input unit  720  may be provided for inputting an audio signal or video signal. The A/V input unit  720  may include a camera  721  and a microphone  722 . 
     The camera  721  may be a camera including the lens moving apparatus  100  according to the embodiment. 
     The sensing unit  740  may sense the current state of the device  200 A, such as whether the device  200 A is in an open or closed state, the location of the device  200 A, whether a user has contacted the device  200 A, the azimuth of the device  200 A, or the acceleration/deceleration of the device  200 A, and may generate a sensing signal for controlling the operation of the device  200 A. In addition, the sensing unit  740  may sense whether power has been supplied from the power supply unit  790  or whether an external device has been coupled to the interface unit  770 . 
     The input/output unit  750  may generate input or output related to visual sensation, auditory sensation, or tactile sensation. The input/output unit  750  may generate input data for controlling the operation of the device  200 A. In addition, the input/output unit  750  may display information processed by the device  200 A. 
     The input/output unit  750  may include a keypad unit  730 , a display panel  751 , a sound output module  752 , and a touchscreen panel  753 . The keypad unit  730  may generate input data via keypad input. 
     The display panel  751  may include a plurality of pixels, the colors of which are changed according to an electrical signal. 
     In a call signal receiving mode, a telephone conversation mode, a recording mode, a voice recognition mode, or a broadcast receiving mode, the sound output module  752  may output audio data received from the wireless communication unit  710  or may output audio data stored in the memory unit  760 . 
     The touchscreen panel  753  may convert a change in capacitance generated by a user touch on a specific region thereof into an electrical input signal. 
     The memory unit  760  may store programs for processing or control of the controller  780 , input/output data, and images captured by the camera  721 . 
     The interface unit  770  may receive data from an external device, may supply power to the respective components of the device  200 A, or may transmit data from the device  200 A to the external device. The controller  780  may control the overall operation of the device  200 A. 
     The controller  780  may include a multimedia module  782  for multimedia reproduction. The controller  780  may perform a pattern recognition process of recognizing a writing input or a picture input performed on the touchscreen panel as text or an image. 
     The power supply unit  790  may supply external power or internal power to the respective components of the device  200 A under the control of the controller  780 . 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.