Patent Publication Number: US-2019187405-A1

Title: Lens holder, object lens driving device, optical pickup device, and method for manufacturing lens holder

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a lens holder, an object lens driving device, an optical pickup device, and a method for manufacturing a lens holder. 
     2. Description of the Related Art 
     PTL 1 discloses an object lens driving device including a lens holder. According to the object lens driving device disclosed in PTL 1, a coil part constituted by a winding wire wound beforehand is attached to a lens holder, and then soldered to the lens holder to achieve conductive connection of the winding wire. 
     CITATION LIST 
     Patent Literature 
     PTL 1: Unexamined Japanese Patent Publication No. 2000-57601 
     SUMMARY 
     The present disclosure provides a lens holder and others capable of easily achieving conductive connection of a winding wire. 
     A lens holder according to the present disclosure includes: a holder body; and at least one winding wire wound around the holder body. The holder body includes: at least one winding body; at least one first projection and at least one second projection each projecting from a surface of the holder body; and at least one winding terminal positioned between the at least one first projection and the at least one second projection, and provided on the surface of the holder body. A part of the at least one winding wire is wound around the at least one winding body to form a coil. An end of the at least one winding wire is wound around the at least one second projection and connected to the at least one winding terminal. 
     The lens holder according to the present disclosure is capable of easily achieving conductive connection of the winding wire. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a plan view illustrating a part of an optical disc device incorporating an optical pickup device according to an exemplary embodiment; 
         FIG. 2  is a perspective view of an object lens driving device including a lens holder according the exemplary embodiment; 
         FIG. 3  is a view illustrating a state that coils for tracking are formed on the lens holder according the exemplary embodiment; 
         FIG. 4  is a view illustrating a state that coils for focusing are formed on the lens holder according the exemplary embodiment; 
         FIG. 5  is a view illustrating the lens holder according to the exemplary embodiment in a state before the coils are formed; 
         FIG. 6  is a flowchart showing a method for manufacturing the lens holder according to the exemplary embodiment; 
         FIG. 7A  is a view illustrating winding of a winding wire around a first projection and a second projection of the lens holder according to the exemplary embodiment; and 
         FIG. 7B  is a view illustrating connection of the winding wire to a winding terminal of the lens holder according to the exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     An exemplary embodiment is hereinafter described in detail with reference to the drawings as appropriate. However, excessively detailed description may be omitted in some cases. For example, detailed description of well-known matters, and repetitive description of substantially identical configurations may be omitted. This is to avoid that the following description is unnecessarily redundant, and to facilitate the understanding of those skilled in the art. 
     The accompanying drawings and the following description are only presented to help those skilled in the art fully understand the present disclosure. It is therefore not intended that subject matters described in the scope of the appended claims be limited to the drawings and the description herein. 
     Exemplary Embodiment 
     [1. Configuration of Optical Pickup Device] 
     Optical pickup device  3  according to the present exemplary embodiment is initially described.  FIG. 1  is a plan view illustrating a part of optical disc device  4  incorporating optical pickup device  3 . 
     Optical disc device  4  is a recording and reproducing device which records and writes information on and into disc (recording medium)  5 , such as a compact disc (CD), a digital versatile disc (DVD), and a Blu-ray (registered trademark) disc. Optical disc device  4  includes, inside an outer case, turntable  81  which rotates disc  5 , and optical pickup device  3  which irradiates a predetermined position of disc  5  with laser beams. Optical disc device  4  includes a screw shaft (not shown) which extends in parallel with a radial direction of turntable  81 , and a pair of guide shafts  82 . 
     Optical pickup device  3  shifts in the radial direction along guide shafts  82  in accordance with driving of the screw shaft. Optical pickup device  3  includes housing  70 , and object lens driving device  2  described below, and various types of parts are mounted on housing  70 . The various types of parts may include a control integrated circuit (IC), a laser optical system component, and a driver for object lens driving device  2 . 
     [2. Basic Configurations of Object Lens Driving Device and Lens Holder] 
     Basic configurations of object lens driving device  2  and lens holder  1  are hereinafter described with reference to  FIG. 2 . 
       FIG. 2  is a perspective view of object lens driving device  2  according to the exemplary embodiment.  FIG. 3  is a view illustrating a state that coils TC for tracking are formed on lens holder  1 .  FIG. 4  is a view illustrating a state that coils FC 1 , FC 2  for focusing are formed on lens holder  1 . In each of  FIGS. 3 and 4 , (a) is a plan view, (b) is a front view, (c) is a rear view, (d) is a left side view, and (e) is a right side view. 
     Object lens driving device  2  shifts in a predetermined direction object lens  40  fixed to lens holder  1 . In the following description, a focusing direction parallel with an optical axis of object lens  40  is referred to as a Z direction, a tracking direction parallel with the radial direction of turntable  81  is referred to as a Y direction, and a direction perpendicular to both the Z direction and the Y direction at right angles is referred to as an X direction. 
     As illustrated in  FIG. 2 , object lens driving device  2  includes lens holder  1 , object lens  40 , two sets of leads  56   a,    56   b,    56   c,  housing  50 , a plurality of magnets  60   a,    60   b,  and flexible cable  59 . Object lens driving device  2  receives supply of power from optical disc device  4  or optical pickup device  3  via flexible cable  59 . 
     As illustrated in  FIGS. 3 through 5 , lens holder  1  has a rectangular parallelepiped shape, and includes a pair of side surfaces  10   a,    10   b  facing each other in the X direction, a pair of side surfaces  10   c,    10   d  facing each other in the Y direction, and top surface  10   e  perpendicular to both side surfaces  10   a,    10   b,  and side surfaces  10   c,    10   d.  Lens holder  1  has a rectangular shape having long sides extending in the Y direction, and short sides extending in the X direction as viewed in the Z direction. For example, lens holder  1  is made of hard synthetic resin. Lens holder  1  includes a cavity extending from a bottom portion to an inner portion to reduce a weight of lens holder  1 . 
     Lens fixing hole  19  is formed in top surface  10   e  of lens holder  1 . Object lens  40  is fitted into lens fixing hole  19  and fixed to lens fixing hole  19 . 
     Winding bodies  13 ,  15 ,  17  provided on side surface  10   a  of lens holder  1  project from side surface  10   a.  Winding body  13  is disposed at a center in the extension direction of the long sides (Y direction), while winding bodies  15 ,  17  are disposed on both sides of winding body  13 , respectively. Winding bodies  14 ,  16 ,  18  provided on side surface  10   b  of lens holder  1  also project from side surface  10   b . Winding body  14  is disposed at the center in the extension direction of the long sides, while winding bodies  16 ,  18  are disposed on both sides of winding body  14 , respectively. 
     As illustrated in  FIG. 3 , winding wire  20   a  of approximately  30  turns is wound around each of winding bodies  13 ,  14  to form coils TC for tracking. As illustrated in  FIG. 4 , winding wire  20   b  of approximately 40 turns is wound around each of winding bodies  15 ,  16  to form coils FC 1  for focusing. Winding wire  20   c  of approximately 40 turns is wound around each of winding bodies  17 ,  18  to form coils FC 2  for focusing in a rectangular shape. A winding direction of coils FC 1  is opposite to a winding direction of coils FC 2 . Each of coils TC, FC 1 , FC 2  has a rectangular shape, and is disposed such that each coil axis extends in parallel with the X direction. Each of winding wires  20   a  through  20   c  is made of a copper material, for example. A coating is formed on each surface of winding wires  20   a  through  20   c.    
     A plurality of first projections  11   a,    11   b ,  11   c  and a plurality of second projections  12   a,    12   b,    12   c  are provided on each of side surfaces  10   c  and  10   d  of lens holder  1 . A configuration including first projections  11   a  through  11   c  and second projections  12   a  through  12   c  will be detailed below. 
     As illustrated in  FIG. 2 , two sets of leads  56   a,    56   b,    56   c  extend in the X direction. First ends Le 1  of two sets of leads  56   a,    56   b,    56   c  are respectively connected to side surfaces  10   c,    10   d  of lens holder  1 . Each of leads  56   a  through  56   c  is constituted by an elastic wire for suspension, and configured to support lens holder  1 , and regulate movement of lens holder  1  such that a shift amount of lens holder  1  is limited to a predetermined range. In addition, each of leads  56   a  through  56   c  is a wire for power supply, and configured to supply power to a corresponding one of winding wires  20   a  through  20   c  (i.e., coils TC, FC 1 , FC 2 ) after the power is input to flexible cable  59 . Each of leads  56   a  through  56   c  is made of a beryllium copper material, for example. A metal coating is formed on each surface of leads  56   a  through  56   c.    
     Housing  50  includes housing body  51  corresponding to a chassis, and support block  52  provided on housing body  51 . Housing body  51  is made of metal, such as iron, having magnetic susceptibility. Support block  52  includes a pair of dampers  53  made of a resin material. Second ends Le 2  of two set of leads  56   a ,  56   b,    56   c  are respectively connected to the pair of dampers  53 . Housing  50  supports lens holder  1  via leads  56   a  through  56   c.  Housing  50  further includes magnet fixing portions  54   a,    54   b  that serve as a yoke, are partially folded, and face each other in the X direction. 
     Each of magnets  60   a,    60   b  has a quadrangular prism shape. Magnet  60   a  is fixed to magnet fixing portion  54   a  via an adhesive or the like, while magnet  60   b  is fixed to magnet fixing portion  54   b  via an adhesive or the like. Magnets  60   a ,  60   b  respectively include facing surfaces facing each other in the X direction. The facing surface of magnet  60   a  faces side surface  10   a  of holder body  10 , while the facing surface of magnet  60   b  faces side surface  10   b  of holder body  10 . For example, the facing surface of magnet  60   a  on the Y-direction positive side forms a north pole, while the facing surface of magnet  60   a  on the Y-direction negative side forms a south pole, with a boundary located at a center of magnet  60   a  in the longitudinal direction (Y direction). On the other hand, the facing surface of magnet  60   b  on the Y-direction positive side forms a south pole, while the facing surface of magnet  60   b  on the Y-direction negative side forms a north pole, with a boundary located at a center of magnet  60   b  in the longitudinal direction. This structure generates a magnetic field in a space sandwiched between magnets  60   a ,  60   b.    
     An upper side of each of rectangular coils FC 1 , FC 2  (side located on Z-direction positive side) is disposed between magnets  60   a,    60   b.  Accordingly, when current flows in coils FC 1 , FC 2 , a force in the Z direction is generated in each of coils FC 1 , FC 2 . Accordingly, lens holder  1  shifts in the Z direction (focusing direction). 
     Each side of rectangular coils TC located on the Y-direction positive side is affected by a magnetic field directed toward the X-direction negative side, while each side of coils TC located on the Y-direction negative side is affected by a magnetic field directed toward the X-direction positive side. Accordingly, when current flows in each coil TC, a force in the Y direction is generated in each coil TC, and shifts lens holder  1  in the Y direction (tracking direction). The forces generated in the upper side and the lower side of coils TC are canceled by each other. 
     As described above, lens holder  1  of object lens driving device  2  is configured to shift in the focusing direction or the tracking direction in accordance with supply of power to coils FC 1 , FC 2  or coils TC. 
     [3. Configuration of Lens Holder] 
     A detailed configuration of lens holder  1  is now described. 
     As described above, winding wire  20   a  constitutes coils TC for tracking, while winding wires  20   b,    20   c  constitute coils FC 1 , FC 2  for focusing, respectively. Coils TC, FC 1 , FC 2  are formed by routing winding wires  20   a  through  20   c , respectively, with ends we of winding wires  20   a  through  20   c  fixed to predetermined positions, and winding a part of winding wires  20   a  through  20   c  around corresponding winding bodies  13  through  18 . Lens holder  1  according to the present exemplary embodiment has a following structure in areas of ends we of winding wires  20   a  through  20   c.    
       FIG. 5  is a view illustrating lens holder  1  in a state before coils TC, FC 1 , FC 2  are formed. In  FIG. 5 , (a) is a plan view, (b) is a front view, (c) is a rear view, (d) is a left side view, and (e) is a right side view. 
     As illustrated in  FIG. 5 , first projections  11   a,    11   b ,  11   c,  and second projections  12   a,    12   b,    12   c  are provided on side surface  10   c  of holder body  10 . On the other hand, second projections  12   a,    12   b,    12   c,  and first projections  11   a,    11   b,    11   c  are provided on side surface  10   d.    
     For example, second projection  12   a  on side surface  10   c  is a portion around which one end we of winding wire  20   a  is wound and fixed, while second projection  12   a  on side surface  10   d  is a portion around which other end we of winding wire  20   a  is wound and fixed. First projection  11   a  on side surface  10   c  is a portion to which one end we of winding wire  20   a  is temporarily attached, while first projection  11   a  on side surface  10   d  is a portion to which other end we of winding wire  20   a  is temporarily attached, during wiring on lens holder  1 . 
     First projection  11   a  is disposed at a predetermined distance from second projection  12   a  in the X direction. More specifically, first projection  11   a  is disposed away from second projection  12   a  by a length ranging from 1 mm to 10 mm (inclusive) in the X direction to secure a sufficient space for insertion of tweezers or a soldering tool between first projection  11   a  and second projection  12   a  after a winding process. This configuration also applies to first projections  11   b ,  11   c  and second projections  12   b,    12   c  provided on respective side surfaces  10   c,    10   d.    
     Each of first projections  11   a  through  11   c  and second projections  12   a  through  12   c  on side surface  10   c  has a columnar shape, and projects perpendicularly from side surface  10   c.  Similarly, each of first projections  11   a  through  11   c  and second projections  12   a  through  12   c  on side surface  10   d  has a columnar shape, and projects perpendicularly from side surface  10   d.  For example, a projection amount of first projection  11   a  from side surface  10   c  falls within a range from 5 times to 50 times (inclusive) larger than a diameter of winding wire  20   a.    
     First wiring substrate  30  is provided between first projections  11   a  through  11   c  and second projections  12   a  through  12   c  on side surface  10   c.  Similarly, second wiring substrate  30  is provided between first projections  11   a  through  11   c  and second projections  12   a  through  12   c  on side surface  10   d.  Each of wiring substrates  30  is bonded and fixed to side surface  10   c  or  10   d  of holder body  10  to be combined with holder body  10  into one body. Each of wiring substrates  30  includes a notch for alignment with holder body  10 . 
     A plurality of winding terminals  31   a,    31   b,    31   c,  and a plurality of lead terminals  32   a,    32   b,    32   c  are formed on each surface of wiring substrates  30 . Each of winding terminals  31   a  through  31   c  and lead terminals  32   a  through  32   c  constitutes a land-shaped electrode. 
     First ends Le 1  of leads  56   a,    56   b,    56   c  described above are connected to lead terminals  32   a,    32   b,    32   c,  respectively, via solder  35  in one-to-one correspondence. Lead terminals  32   a,    32   b,    32   c  are connected to winding terminals  31   a,    31   b,    31   c , respectively, via surface wiring or inner wiring of wiring substrate  30  in one-to-one correspondence. Winding terminals  31   a,    31   b,    31   c  are connected to ends we of winding wires  20   a,    20   b,    20   c,  respectively, via solder  35  in one-to-one correspondence. This wiring structure achieves power supply to respective coils TC, FC 1 , FC 2 . 
     A positional relationship between first projection  11   a,  lead terminal  32   a , winding terminal  31   a,  and second projection  12   a  is described herein. For example, winding terminal  31   a  is disposed closer to second projection  12   a  than lead terminal  32   a  is. More specifically, winding terminal  31   a  is positioned between first projection  11   a  and second projection  12   a.  In further detail, winding terminal  31   a  is positioned on a line connecting first projection  11   a  with second projection  12   a  when viewed in a direction perpendicular to side surface  10   c . Winding terminal  31   a  may be disposed at a position between first projection  11   a  and second projection  12   a  and not on the line connecting first projection  11   a  with second projection  12   a.  In addition, lead terminal  32   a  is disposed closer to first projection  11   a  than winding terminal  31   a  is. Lead terminal  32   a  is positioned between first projection  11   a  and second projection  12   a  and on an obliquely upper side of first projection  11   a . The foregoing positional relationship is also applicable to positional relationships between first projections  11   b,    11   c,  lead terminals  32   b,    32   c,  winding terminals  31   b,    31   c,  and second projections  12   b,    12   c.    
     Presence or absence of winding of winding wire  20   a  is now described. As illustrated in  FIG. 3 , for example, end we of winding wire  20   a  is wound around corresponding second projection  12   a  with 2 through 10 turns for fixation. A tip of end we of winding wire  20   a  is connected to winding terminal  31   a  via solder  35 . In other words, second projection  12   a  is disposed on wire route WL which connects winding terminal  31   a  with coil TC via winding wire  20   a,  in which condition end we of winding wire  20   a  is wound around second projection  12   a.  On the other hand, first projection  11   a  is disposed out of winding wire route WL, in which condition winding wire  20   a  is not wound around first projection  11   a.  Winding wire  20   a  is not wound around first projection  11   a  because first projection  11   a  is a portion to which winding wire  20   a  is only temporarily attached. After winding, winding wire  20   a  wound around first projection  11   a  is removed. 
     More specifically, as illustrated in (a) in  FIG. 7A , winding wire  20   a  is wound around first projection  11   a  to be temporarily fixed to first projection  11   a . Subsequently, winding wire  20   a  is routed to second projection  12   a  as illustrated in (b) in  FIG. 7A , and then wound around second projection  12   a  as illustrated in (c) in  FIG. 7A . After completion of a series of winding processes, winding wire  20   a  positioned between first projection  11   a  and second projection  12   a  is soldered to winding terminal  31   a  as illustrated in (a) in  FIG. 7B . Thereafter, unnecessary winding wire  20   a  between first projection  11   a  and winding terminal  31   a  is removed as illustrated in (b) in  FIG. 7B . 
     As described above, lens holder  1  according to the present exemplary embodiment includes first projection  11   a.  In this case, winding wire  20   a  is connectable to winding terminal  31   a  in a state that winding wire  20   a  has been fixed by using first projection  11   a  and second projection  12   a,  for example. Accordingly, conductive connection of winding wire  20   a  is easily achievable. 
     The foregoing relationship is also applicable to relationships between winding wires  20   b,    20   c,  first projections  11   b ,  11   c,  second projections  12   b,    12   c , winding terminals  31   b,    31   c,  and lead terminals  32   b,    32   c.  In (a) in  FIG. 4 , second projection  12   b  is shown above second projection  12   a,  for example, for preferential depiction of winding wire  20   b.    
     [4. Method for Manufacturing Lens Holder] 
     A method for manufacturing lens holder  1  is now described with reference to  FIG. 6 .  FIG. 6  is a flowchart showing the method for manufacturing lens holder  1 . 
     Described herein is a method for forming coil TC as a typical example of sets of three coils TC, FC 1 , FC 2  of lens holder  1 . According to the present exemplary embodiment, routing, winding, and other processing of winding wire  20   a  are performed by using an automatic winding machine which includes a needle movable in directions of three or more axes. 
     Initially, first part we 1  of end we of winding wire  20   a  is wound around first projection  11   a  provided on side surface  10   c,  and fixed to first projection  11   a  (S 11 : see (a) in  FIG. 7A ). For example, a winding number of this winding is set in a range from 2 to 10 turns. 
     Subsequently, winding wire  20   a  is routed from first projection  11   a  to second projection  12   a  provided on side surface  10   c  (S 12 : see (b) in  FIG. 7A ). As a result, winding wire  20   a  is extended to a position overlapping with winding terminal  31   a  as viewed in a direction perpendicular to side surface  10   c.    
     Subsequently, second part we 2  of end we of winding wire  20   a  is wound around second projection  12   a  and fixed to second projection  12   a  (S 13 : see (c) in  FIG. 7A ) For example, a winding number of this winding is set in a range from 2 to 10 turns. Second part we 2  of end we of winding wire  20   a  herein is a portion located closer to a center of winding wire  20   a  than first part we 1  of end we of winding wire  20   a  wound around first projection  11   a  is. 
     Subsequently, winding wire  20   a  is routed from second projection  12   a  toward winding body  13  provided on side surface  10   a  (S 14 ). Thereafter, winding wire  20   a  is wound around winding body  13  (S 15 ). For example, a winding number of this winding is set to 30 turns. 
     Subsequently, winding wire  20   a  is routed from winding body  13  toward winding body  14  provided on side surface  10   b  along a projection provided on the top surface  10   e  side of holder body  10  (S 16 ). Thereafter, winding wire  20   a  is wound around winding body  14  (S 17 ). For example, a winding number of this winding is set to 30 turns. 
     Subsequently, winding wire  20   a  is routed from winding body  14  toward second projection  12   a  provided on side surface  10   d  (S 18 ). Thereafter, second part we 2  of end we of winding wire  20   a  is wound around second projection  12   a,  and fixed to second projection  12   a  (S 19 ). For example, a winding number of this winding is set in a range from 2 to 10 turns. Second part we 2  of end we of winding wire  20   a  herein is a portion located closer to the center of winding wire  20   a  than first part we 1  of end we of winding wire  20   a  wound around first projection  11   a  in a subsequent step is. 
     Subsequently, winding wire  20   a  is routed from second projection  12   a  toward first projection  11   a  provided on side surface  10   d  (S 20 ). As a result, winding wire  20   a  is extended to a position overlapping with winding terminal  31   a  as viewed in a direction perpendicular to side surface  10   d.    
     Thereafter, first part we 1  of end we of winding wire  20   a  is wound around first projection  11   a,  and fixed to first projection  11   a  (S 21 ). For example, a winding number of this winding is set in a range from 2 to 10 turns. 
     Subsequently, a portion of winding wire  20   a  extended between first projection  11   a  and second projection  12   a  provided on side surface  10   c  is soldered to winding terminal  31   a  provided on side surface  10   c.  Similarly, a portion of winding wire  20   a  extended between first projection  11   a  and second projection  12   a  provided on side surface  10   d  is soldered to winding terminal  31   a  provided on side surface  10   d  (S 22 : see (a) in  FIG. 7B ). This soldering is performed in a state that winding wire  20   a  has been fixed to each of first projection  11   a  and second projection  12   a,  and a state that winding terminal  31   a  is disposed on a rear side of winding wire  20   a  extended between first projection  11   a  and second projection  12   a . Accordingly, winding wire  20   a  is easily soldered to winding terminal  31   a.    
     Thereafter, winding wire  20   a  wound around first projection  11   a,  and winding wire  20   a  provided between first projection  11   a  and winding terminal  31   a  are removed by using a tool such as tweezers (S 23 : see (b) in  FIG. 7B ). The winding process of coils TC is now completed. 
     Similarly, steps S 11  through S 23  are performed for each of winding wires  20   b,    20   c  to form two pairs of coils FC 1 , FC 2 . More specifically, winding wire  20   b  is wound around first projection  11   b  and second projection  12   b  that are provided on side surface  10   c,  winding body  16  provided on side surface  10   b,  winding body  15  provided on side surface  10   a,  and second projection  12   c  and first projection  11   c  that are provided on side surface  10   c  in this order. Thereafter, soldering and removal of unnecessary winding wires are performed. As a result, a pair of coils FC 1  are formed. Similarly, winding wire  20   c  is wound around first projection  11   b  and second projection  12   b  that are provided on side surface  10   d,  winding body  18  provided on side surface  10   b,  winding body  17  provided on side surface  10   a,  and second projection  12   c  and first projection  11   c  that are provided on side surface  10   d  in this order. Thereafter soldering and removal of unnecessary winding wires are performed. As a result, a pair of coils FC 2  are formed. 
     Respective steps in S 11  through S 21  for coils TC, FC 1 , FC 2  may be performed before execution of steps in S 22  and S 23 . In this case, the steps in S 22  and S 23  are collectively performed. Manufacture of lens holder  1  including coils TC, FC 1 , FC 2  is completed after winding of winding wires  20   a  through  20   c  by the foregoing steps. 
     Object lens driving device  2  is manufactured by following steps, for example. After completion of the step in S 23 , object lens  40  is attached to lens holder  1 . Housing  50  to which second ends Le 2  of leads  56   a  through  56   c  have been attached, and lens holder  1  described above are mounted on a jig. First ends Le 1  of leads  56   a  through  56   c  are soldered to lead terminals  32   a  through  32   c . Manufacture of object lens driving device  2  is now completed by the foregoing steps. 
     [5. Effects and Others] 
     As described above, lens holder  1  according to the present exemplary embodiment includes holder body  10  and winding wire (e.g., winding wire  20   a ) wound around holder body  10 . Holder body  10  includes: a winding body (e.g., winding body  13 ); a first projection (e.g., first projection  11   a ) and a second projection (e.g., second projection  12   a ) each projecting from a surface of holder body  10 ; and a winding terminal (e.g., winding terminal  31   a ) positioned between first projection  11   a  and second projection  12   a,  and provided on the surface of holder body  10 . A part of winding wire  20   a  is wound around winding body  13  to form a coil (e.g., coil TC). End we of winding wire  20   a  is wound around second projection  12   a  and connected to winding terminal  31   a.    
     According to lens holder  1  including first projection  11   a,  winding wire  20   a  is thus connectable to winding terminal  31   a  positioned between first projection  11   a  and second projection  12   a  in a state that winding wire  20   a  has been fixed by using first projection  11   a  and second projection  12   a,  for example. Accordingly, conductive connection of winding wire  20   a  is easily achievable. Moreover, connection of winding wire  20   a  to winding terminal  31   a  while fixing winding wire  20   a  to winding terminal  31   a  improves connection stability between winding wire  20   a  and winding terminal  31   a.    
     Second projection  12   a  may be disposed on wire route WL that connects winding terminal  31   a  with coil TC via winding wire  20   a,  while first projection  11   a  may be disposed out of wire route WL. 
     When first projection  11   a  is disposed out of wire route WL as described above, unnecessary winding wire  20   a  positioned between first projection  11   a  and winding terminal  31   a  is easily removable after connection between winding wire  20   a  and winding terminal  31   a,  for example. Accordingly, a removing process of unnecessary wiring after connection of winding wire  20   a  to winding terminal  31   a  is easily achievable. 
     Winding terminal  31   a  may be a land-shaped electrode, while end we of winding wire  20   a  may be connected to winding terminal  31   a  via solder  35 . 
     According to this configuration, end we of winding wire  20   a  is easily connectable to winding terminal  31   a.    
     Holder body  10  may include wiring substrate  30  provided between first projection  11   a  and second projection  12   a,  while winding terminal  31   a  may be formed on a surface of wiring substrate  30 . 
     According to this configuration, winding terminal  31   a  is easily formed on holder body  10 . 
     Holder body  10  may include the pair of side surfaces  10   c,    10   d.  First projections  11   a  and second projections  12   a  may project from each of the pair of side surfaces  10   c,    10   d.    
     According to this configuration, conductive connection of winding wire  20   a  is easily made on each of two side surfaces  10   c,    10   d  of holder body  10 . 
     A plurality of wire routes WL may be provided to connect winding terminals  31   a,    31   b,    31   c  with corresponding coils TC, FC 1 , FC 2  via corresponding winding wires  20   a,    20   b,    20   c.  A plurality of sets (three sets in present exemplary embodiment) each including one first projection, one winding terminal, and one second projection, i.e., first projections  11   a,    11   b ,  11   c,  winding terminals  31   a,    31   b ,  31   c,  and second projections  12   a,    12   b,    12   c,  are provided on each of the side surfaces (e.g., side surface  10   c ) of holder body  10 , in correspondence with the plurality of wire routes WL. 
     When lens holder  1  includes the plurality of sets of first projections  11   a  through  11   c  and second projections  12   a  through  12   c,  in correspondence with the plurality of winding wires  20   a  through  20   c  as described above, conductive connection of winding wires  20   a  through  20   c  to the plurality of winding terminals  31   a  through  31   c  is easily achievable. 
     A projection amount of first projection  11   a  from side surface  10   c  may be larger than a projection amount of second projection  12   a  from side surface  10   c.    
     This configuration allows first projection  11   a  to abut on housing  70  surrounding side surfaces of object lens driving device  2 , reducing shock even when sudden acceleration is applied to, in the Y direction, optical pickup device  3  mounted with lens holder  1 , for example. 
     The projection amount of first projection  11   a  from side surface  10   c  may be smaller than the projection amount of second projection  12   a  from side surface  10   c.    
     This configuration secures a space for insertion of a tool for soldering in connection of winding wire  20   a  to winding terminal  31   a,  for example. 
     The projection amount of first projection  11   a  from side surface  10   c  may be equal to the projection amount of second projection  12   a  from side surface  10   c.    
     Object lens driving device  2  according to the present exemplary embodiment includes: lens holder  1  described above; object lens  40  fixed to holder body  10 ; a lead (e.g., lead  56   a ) having first end Le 1  connected to holder body  10 ; housing  50  connected to second end Le 2  of lead  56   a  and configured to support holder body  10  via lead  56   a;  and magnets  60   a,    60   b  fixed to housing  50 . 
     When lens holder  1  capable of easily achieving conductive connection as described above is used, productivity of object lens driving device  2  increases. Moreover, when lens holder  1  capable of improving connection stability between winding wire  20   a  and winding terminal  31   a  is used, electric connection stability of object lens driving device  2  improves. 
     A lead terminal (e.g., lead terminal  32   a ) conductively connected to the winding terminal (e.g., winding terminal  31   a ) may be further provided on the surface of holder body  10 , while first end Le 1  of lead  56   a  may be connected to lead terminal  32   a.    
     According to this configuration, conductive connection between lead  56   a  and winding wire  20   a  is easily achievable via lead terminal  32   a  and winding terminal  31   a.    
     Optical pickup device  3  according to the present exemplary embodiment includes: object lens driving device  2  described above; and housing  70  that fixes housing  50  of object lens driving device  2 . 
     When object lens driving device  2  with improved productivity as described above is used, productivity of optical pickup device  3  improves. 
     A method for manufacturing lens holder  1  according to the present exemplary embodiment includes following steps. According to the manufacturing method described in the present exemplary embodiment, winding wire  20   a  is wound around first projection  11   a  or second projection  12   a  for fixation. However, for the purpose of fixation, winding wire  20   a  may be embedded in a recess or pinched by a clip, rather than wound. In the following method for manufacturing lens holder  1 , it is assumed that first projection  11   a  constitutes a first fixing portion, and that second projection  12   a  constitutes a second fixing portion. 
     According to the method for manufacturing lens holder  1  in the present exemplary embodiment, lens holder  1  includes the first fixing portion (corresponding to first projection  11   a ) that fixes first part we 1  included in end we of winding wire  20   a,  the second fixing portion (corresponding to second projection  12   a ) that fixes second part we 2  included in end we of winding wire  20   a  and located closer to a center of winding wire  20   a  than first part we 1  of end we of winding wire  20   a  is, a winding body (e.g., winding body  13 ) located closer to the center of winding wire  20   a  than the second fixing portion is, and winding terminal  31   a  located between the first fixing portion and the second fixing portion. The method for manufacturing lens holder  1  includes: fixing first part we 1  of winding wire  20   a  to the first fixing portion; extending winding wire  20   a  to connect the first fixing portion with the second fixing portion; fixing second part we 2  of winding wire  20   a  to the second fixing portion; routing winding wire  20   a  to connect the second fixing portion with winding body  13 ; winding winding wire  20   a  around winding body  13 ; and soldering, to winding terminal  31   a,  a portion of winding wire  20   a  extended between the first fixing portion and the second fixing portion. 
     According to this method, winding wire  20   a  is connectable to winding terminal  31   a  positioned between the first fixing portion and the second fixing portion in a state that winding wire  20   a  has been fixed by using the first fixing portion and the second fixing portion. Accordingly, conductive connection of winding wire  20   a  is easily achievable. Moreover, connection of winding wire  20   a  to winding terminal  31   a  while fixing winding wire  20   a  to winding terminal  31   a  improves connection stability between winding wire  20   a  and winding terminal  31   a.    
     Other Exemplary Embodiments 
     The exemplary embodiment has been described above as a specific example of the technology disclosed in the present application. However, the technology of the present disclosure is not limited to the exemplary embodiment described herein, but is applicable to other exemplary embodiments in which a change, a replacement, an addition, or an omission is appropriately made. Respective constituent elements described in the above exemplary embodiment may be combined to present a new exemplary embodiment. Described below are exemplary embodiments presented as different examples. 
     For example, the projection amount of first projection  11   a  of lens holder  1  from side surface  10   c  may be equal to or larger than the projection amount of second projection  12   a  from side surface  10   c.  This structure allows first projection  11   a  to abut on inner wall  71  (see  FIG. 1 ) of housing  70  surrounding side surfaces of object lens driving device  2 , reducing shock even when sudden acceleration is applied to optical pickup device  3  in the Y direction. Moreover, this structure prevents a contact between inner wall  71  of housing  70  and second projection  12   a  around which winding wire  20   a  has been wound, thereby reducing loosening or deformation of winding wire  20   a.    
     For example, a thickness of a tip of first projection  11   a  may be smaller than a thickness of a middle portion of first projection  11   a.  According to this structure, winding wire  20   a  is easily separated and removed from first projection  11   a  after the winding process. 
     On the other hand, a thickness of a tip of second projection  12   a  may be larger than a thickness of a middle portion of second projection  12   a.  According to this structure, separation of winding wire  20   a  from second projection  12   a  is avoidable during or after winding of winding wire  20   a  around second projection  12   a.    
     According to the method for manufacturing lens holder  1 , lens holder  1  may be configured to be handled by a robot hand or the like, and turned by 90 degrees in an X-Y plane. According to this configuration, routing efficiency of winding wire  20   a  increases. 
     The turn numbers or the winding numbers of the winding wires around the first projection, the second projection, and the winding bodies are not limited to the turn numbers or the winding numbers specified in the present disclosure. 
     The exemplary embodiment has been described as an example of the technology according to the present disclosure. The accompanying drawings and detailed description have been presented for this purpose. 
     Accordingly, the constituent elements depicted and described in the accompanying drawings and the detailed description may include not only constituent elements essential for solutions to problems, but also constituent elements not essential for solutions to problems and included to present only specific examples of the technology. It should not therefore be determined that the unessential constituent elements included in the accompanying drawings and the detailed description are essential only based on the fact that these constituent elements are included in the drawings and the description. 
     Moreover, the exemplary embodiment, as presented only by way of example of the technology according to the present disclosure, may include various modifications, replacements, additions, and omissions and the like, without departing from a range defined by the appended claims and a range equivalent to this range. 
     The present disclosure is applicable to a recording and reproducing device which writes and reads information to and from a recording medium such as a CD, a DVD, and a Blu-ray (registered trademark) disc.