Abstract:
A lens driver with camera shake reducing function, in which the spring member is easily mountable, and the spring member does not undergo a plastic deformation. The lens driver with camera shake reducing function takes the direction of the photographed object as the forward direction of the optical axis of the lens, comprising: a focusing unit, which causes a lens holder holding the lens to move in the direction of the optical axis; and a camera shake reducing unit, which causes the focusing unit to swing in a direction orthogonal to the direction of the optical axis, characterized in that, comprising: a connecting hole, which is formed at the focusing unit and the camera shake reducing unit and which is opened in the direction of the optical axis; a spring member, which extends in the direction of the optical axis and the end of which passes through the connecting hole; and an open route, which extends from the connection hole of at least one of the focusing unit and the camera shake reducing unit in a direction orthogonal to the optical axis, and which engages the spring member temporarily before the spring member is connected to the connecting hole.

Description:
TECHNICAL FIELD 
       [0001]    The invention relates to a lens driver for cameras of mobile phones, etc., and in particular, to a lens driver with camera shake reducing function which automatically corrects the camera shake caused by the camera while driving the camera for an auto-focusing. 
       BACKGROUND 
       [0002]    A lens driver with camera shake reducing function utilizes the auto-focusing function to perform the focusing, meanwhile it causes the lens to swing in a direction at right angle to (orthogonal to) the optical axis direction of the lens according to the camera shake generated in photographing, so as to suppress the blurring of the image that is imaged on the image sensor. 
         [0003]    For example, a lens driver with camera shake reducing function is proposed in patent document 1, which utilizes a linear spring member extending along the optical axis direction to support a focusing unit for focusing of the lens in form of suspending rack such that the focusing unit may swing, so as to suppress a blurring of the image. 
         [0004]      FIG. 6  is an illustration of a lens driver  30  with camera shake reducing function from the prior art.  FIG. 6( a )  is a perspective view of the lens driver  30  with camera shake reducing function,  FIG. 6( b )  is an exploded view and  FIG. 6( c )  is an enlarged view of the main part. The optical axis of the not illustrated lens is set to Z (Z-axis) direction and two directions orthogonal to Z-axis are set to X (X-axis) direction and Y (Y-axis) direction, and a direction of the photographed object is set to forward direction of the optical axis direction (+Z side, front side). 
         [0005]    As illustrated in  FIG. 6( a ) , the lens driver  30  with camera shake reducing function is generally rectangular, and its central portion is opened in Z-direction in form of a circle, so as to hold the not illustrated lens. As illustrated in  FIG. 6( b ) , the lens driver  30  with camera shake reducing function is composed of a focusing unit  31  and a camera shake reducing unit  32 . 
         [0006]    The focusing unit  31  is composed of a lens holder  33 , a focusing coil  34 , a magnet  35 , a magnet holder  36 , a plate-like spring member  37  and a separator  38 . Furthermore, the camera shake reducing unit  32  is composed of a coil for swinging  39 , a printed circuit board  41 , a flexible printed circuit board  42 , a linear spring member  40  and a base  43 . 
         [0007]    The lens holder  33  of the focusing unit  31  is a cylindric member which is opened in Z-direction and which serves to hold the lens on its inner circumference. The focusing coil  34  is wound, according to the shape of the outer circumference of the lens holder  33 , onto the outer circumference of the lens holder  33 . On the outer diameter side of the focusing coil  34 , a magnet  35  formed by permanent magnet faces the focusing coil  34  with a gap in the redial direction. The magnet  35  is plate-like, and held by a magnet holder  36  in form of a box with four borders. Moreover, the magnets  35  are spaced at a interval of 90 degree around Z-axis in a manner that their magnet poles face X-direction and Y-axis. 
         [0008]    The plate-like spring member  37  is composed of a front spring member  37 A and a back spring member  37 B. The inner circumference of the front spring member  37 A and the back spring member  37 B is connected with the end face on +Z side of the lens holder  33  and the end face on −Z side of the lens holder  33 . The outer circumference of the front spring member  37 A and the back spring member  37 B is connected with the end face on +Z side of the magnet holder  36  and the end face on −Z side of the magnet holder  36 . In this way, the front spring member  37 A and the back spring member  37 B support the lens holder  33  in form of suspending rack such that they may move along Z-axis. 
         [0009]    Furthermore, on −Z side of the back spring member  37 B, a separator  38  is arranged. The separator  38  clamps, together with the end face on −Z side of the magnet holder  36 , the outer circumference of the back spring member. 
         [0010]    When the focusing coil  34  is electrified, the focusing unit  31  built as described above generates a Lorentz force in Z-axis direction, which may move the lens holder  33  in Z-axis direction. 
         [0011]    The camera shake unit  32  is built by stacking respective members on the plate-like base  43  which is opened in the center and oriented in Z-axis direction. In particular, a flexible printed circuit board  42  is mounted on +Z side surface of the base  43 , and on the +Z side surface of the flexible circuit board  42 , a printed circuit board  41  is mounted. On the printed circuit board  41 , a coil for swinging  39  is arranged which is supplied with power externally via the flexible printed circuit board  42 . 
         [0012]    The coil for swinging  39  is wound along Z-axis, and is composed of X side coils for swinging  39 X, which are arranged on −X side and +X side of the printed circuit board  41 , and Y side coils for swinging  39 Y, which are arranged on −Y side and +Y side. Furthermore, the coils for swinging  39  faces the −Z side surface of the magnet  35  at an interval in Z-axis direction. 
         [0013]    The spring member  40  is a linear spring which extends in Z-direction and which is arranged on four corners of the base  43 . An end of the spring member  40  passes through a connecting hole  43   r  formed on the base  43   r  and an connecting hole  37   r  formed on the front spring member  37 A, so as to support the focusing unit  31  such that it may swing in X-axis direction and Y-axis direction. More specifically, as shown in  FIG. 6( c ) , on the outer holding portion  37   h  of the front spring member  37 A, a connecting hole  37   r  is formed, and on four corners of the base  43 , connecting holes  43   r  are formed. 
         [0014]    Furthermore, a shielding housing  45  is a box with a round opening, which surrounds the outer circumference of the focusing unit  31  and the camera shake unit  32 . 
         [0015]    When the X side coil for swinging  39 X of the camera shake reducing unit  32  as built above is electrified, this X side coil for swinging  39 X will generate a Lorentz force in X-axis direction, and the focusing unit  31  may be moved in X-axis direction using the reaction force generated on the magnet  35 . Furthermore, as to the Y side coil for swinging  39 Y, when this Y side coil for swinging  39 Y is electrified, it will generate a Lorentz force in Y-axis direction, and the focusing unit  31  may be moved in Y-axis direction using the reaction force generated on the magnet  35 . 
       PRIOR ART 
     Patent Document 
       [0016]    Patent document 1: Japanese patent publication No. JP 2013-24938. 
         [0017]    As a method for mounting the linear spring member  40  at the base  43  and the front spring member  37 A, the spring member  40  is pinched using tweezers, etc., so that the spring member  40  faces Z-direction and passes through the connecting hole  37   r  from +Z side and is inserted into the connecting hole  43   r  of the base  43 . Next, the +Z side end of the spring member  40  should be firmly connected to the connecting hole  37   r  using tin solder, glue, etc., and the −Z side end of the spring member  40  is firmly connected to the connecting hole  43   r  using a firm connection member  44 , but this mounting operation requires proficient skills. 
         [0018]    However, it is difficult to pass the end of the spring member  40  through the connecting holes  37   r  and  43   r  without contacting the circumference of connecting holes  37   r  and  43   r.  If the end of the spring member  40  contacts the front spring member  37 A, then the outer holding portion  37   h  will undergo a deformation of bending; and if the end of the spring member  40  contacts the base  43 , then the spring member  40  will undergo a deformation of bending, and it is possible that the front spring member  37 A and the linear spring member  40  are degraded. 
         [0019]    As described above, if a lens driver  30  with camera shake reducing function is assembled in the case of a damaged front spring member  37 A and linear spring member  40 , then the optical axis of the lens mounted at the lens driver  30  with camera shake reducing function will be tilted. If a photographing is performed in the case of a tilted optical, then problems may occur such as the photographed image is deformed, the camera shake unit  32  is unable to swing the focusing unit  31  accurately in X-axis direction and Y-axis direction, and the function of the lens driver  30  with camera shake reducing function may be hindered. 
       SUMMARY OF THE INVENTION 
       [0020]    It is the object of the invention, to provide a lens driver with camera shake reducing function, in which the spring member is easily mountable, and the spring member does-not undergo a plastic deformation. 
         [0021]    The lens driver with camera shake reducing function of the invention takes the direction of the photographed object as the forward direction of the optical axis of the lens, comprising: a focusing unit, which causes a lens holder holding the lens to move in the direction of the optical axis; and a camera shake reducing unit, which causes the focusing unit to swing in a direction orthogonal to the direction of the optical axis, characterized in that, comprising: a connecting hole, which is formed at the focusing unit and the camera shake reducing unit and which is opened in the direction of the optical axis; a spring member, which extends in the direction of the optical axis and the end of which passes through the connecting hole; and an open route, which extends from the connection hole of at least one of the focusing unit and the camera shake reducing unit in a direction orthogonal to the optical axis, and which engages the spring member temporarily before the spring member is connected to the connecting hole. 
         [0022]    In the case of the lens driver with camera shake reducing function as built above, the spring member may be easily mounted and the spring member will not fall off from the connecting hole when being mounted. 
         [0023]    Furthermore, the invention is characterized in that, the open route is hook-shaped. 
         [0024]    Thus, when mounting the spring member at the connecting hole, the spring member will not be damaged. 
         [0025]    Furthermore, the invention is characterized in that, the width of the open route is smaller than the outer diameter of the spring member. 
         [0026]    In this way, when mounting the spring member at the connecting hole, the spring member will not be damaged, and it can be reliably prevented that the spring member falls off from the connecting hole. 
         [0027]    Moreover, the invention is characterized in that, the open route is formed radially on a side of the connecting hole and a notch is formed radially on another side of the connecting hole. 
         [0028]    Thus, when inserting the spring member into the connecting hole via the open route, the possibility of damaging the spring member may be further decreased. 
         [0029]    Furthermore, the above summary of the invention does not enumerate all features which the invention requires, and a re-combination of the above features also falls within the scope of the invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0030]      FIG. 1  is an illustration of appearance and internal structure of the lens driver with camera shake reducing function of the first embodiment. 
           [0031]      FIG. 2  is an illustration of the main part of a lens driver with camera shake reducing function of a variation of the second embodiment. 
           [0032]      FIG. 3  is an illustration of the main part of a lens driver with camera shake reducing function of a variation of the third embodiment. 
           [0033]      FIG. 4  is a perspective view of the main part of a lens driver with camera shake reducing function of a variation of the first embodiment. 
           [0034]      FIG. 5  is a perspective view of the main part of a lens driver with camera shake reducing function of another variation of the first embodiment. 
           [0035]      FIG. 6  is an illustration of appearance and internal structure of the prior lens driver with camera shake reducing function. 
       
    
    
     DESCRIPTION OF REFERENCE NUMERALS 
       [0000]    
       
           10  lens driver with camera shake reducing function 
           11  focusing unit 
           12  camera shake unit 
           13  lens holder 
           14  focusing coil 
           15  magnet 
           16  magnet holder 
           17  spring member 
           19  coil for swinging 
           20  spring member 
       
     
       DETAILED DESCRIPTION OF THE INVENTION 
       [0046]    In the following, the invention is described in conjunction with embodiments in detail, but the embodiments below do not constitute any limitation on the invention; furthermore, a combination of all features described in the embodiments is not essential for the problem-solving technical means of the invention. 
         [0047]      FIG. 1( a )  is a perspective view of the lens driver  10  with camera shake reducing function of the first embodiment,  FIG. 1( b )  is an exploded perspective view of the lens driver  10  with camera shake reducing function, and  FIG. 6( c )  is an front view of the front spring member  17 A. In the following, the direction of the optical axis  0  of the lens  18  is set to Z-axis direction and the side of the photographed object is set to the forward direction of the Z-axis direction (+Z side, the front side), and two directions orthogonal to Z-axis are set to X-axis direction and Y-axis direction. 
         [0048]    As illustrated in  FIG. 1( a ) , the lens driver  10  with camera shake reducing function is generally rectangular, and its central portion is opened in Z-direction in form of a circle, so as to hold the lens  18 . As illustrated in  FIG. 1( b ) , the lens driver  10  with camera shake reducing function is composed of a focusing unit  11  and a camera shake reducing unit  12 . 
         [0049]    As illustrated in  FIGS. 1( a ) and 1( b ) , the focusing unit  11  comprises a lens holder  13 , a focusing coil  14 , a magnet  15 , a magnet holder  16 , and a plate-like spring member  17 . Furthermore, the camera shake reducing unit  12  comprises a coil for swinging  19 , a linear spring member  20  and a base  21 . 
         [0050]    The lens holder  13  of the focusing unit  11  is a cylindric member which is opened in Z-direction and which serves to hold the lens  18  on its inner circumference. The focusing coil  14  is wound, according to the shape of the outer circumference of the lens holder  13 , onto the outer circumference of the lens holder  13 . On the outer diameter side of the focusing coil  14 , a magnet  15  formed by permanent magnet faces the focusing coil  14  with a gap in the redial direction. The magnet  15  is plate-like, and held by a magnet holder  16  in form of a box with four borders. A plurality of magnets  15  are spaced at a interval of 90 degree around Z-axis in a manner that their magnet poles face X-direction and Y-axis. 
         [0051]    As shown in  FIGS. 1( b ) and 1( c ) , the spring member  17  is plate-like, including a front spring member  17 A and the back spring member  17 B. The front spring member  17 A is composed of: a ring-shaped inner holding portion  17   a;  an outer holding portion  17   b  in form of a box with four borders; a plurality of arms  17   c  which are located between the inner holding portion  17   a  and the outer holding portion  17   b  and which are repeatedly bended in radial and circumferential direction so as to connect the inner holding portion  17   a  and the outer holding portion  17   b;  connecting holes  17   r  which are formed on four corners of the outer holding portion  17   b;  and open routes  17   k  which is formed by cutting off a part of the connecting holes  17   r  and which extend from the connecting holes  17   r.  The open routes  17   k  are orthogonal to the optical axis and are hook-shape. Furthermore, the open routes  17   k  extend from the connecting holes  17   r  generally parallel to the borders of outer holding portion  17   b,  and form a shape that is opened towards the outside of the outer holding portion  17   b.    
         [0052]    As shown in  FIG. 1( b ) , the back spring member  17 B is composed of: a ring-shaped inner holding portion  17   a;  an outer holding portion  17   b  in form of a quadrangle with four corners being cut off; a plurality of arms  17   c  which are located between the inner holding portion  17   a  and the outer holding portion  17   b  and which are repeatedly bended in radial and circumferential direction so as to connect the inner holding portion  17   a  and the outer holding portion  17   b.    
         [0053]    The inner holding portions  17   a  of the front spring member  17 A and the back spring member  17 B are connected with the end face on +Z side and the end face on −Z side of the lens holder  13 . Furthermore, the outer holding portions  17   b  of the front spring member  17 A and the back spring member  17 B are connected with the end face on +Z side and the end face on −Z side of the magnet holder  16 . In this way, the front spring member  17 A and the back spring member  17 B support the lens holder  13  in form of suspending rack such that they may move in Z-axis direction. 
         [0054]    The base  21  of the camera shake unit  12  is a plate which is opened in the center and oriented in Z-axis direction, and coils for swinging  19  are arranged on the base  21 . Connecting holes  21   r  are formed on four corners of the base  21 , for connecting the end  20   b  on back side of the linear spring member  20  as described below. The coil for swinging  19  is composed of X side coils for swinging  19 X, which are arranged on −X side and +X side of the base, and Y side coils for swinging  19 Y, which are arranged on −Y side and +Y side. Furthermore, the coil for swinging is wound in Z-axis direction, and faces the −Z side lateral surface of the magnet  15  at an interval in Z-axis direction. 
         [0055]    The spring member  20  is a linear spring which extends in Z-direction and which four spring members  20  are arranged in this embodiment. An end  20   a  on front side and an end  20   b  on back side of the spring member  20  respectively passes through (connects) a connecting hole  17  formed on front side and a connecting hole  21   r  formed on the base  21 , so as to support the focusing unit  11  such that it may swing in X-axis direction and Y-axis direction. 
         [0056]    When the focusing coil  14  is electrified, the focusing unit  11  built as described above generates a Lorentz force in Z-axis direction, which may move the lens holder  13  in Z-axis direction. 
         [0057]    If the X side coil for swinging  19 X of the camera shake reducing unit  12  is electrified, then on the X side coil for swinging  19 X, a Lorentz force will be generated in X-axis direction, and the focusing unit  11  may be moved in X-axis direction using the reaction force generated on the magnet  15 . Furthermore, when the Y side coil for swinging  19 Y is electrified, on the Y side coil for swinging  19 Y, a Lorentz force will be generated in Y-axis direction, and the focusing unit  11  may be moved in Y-axis direction using the reaction force generated on the magnet  15 . 
         [0058]    As to the mounting methods of the spring members  20 , after the back end  20   b  is embedded into the connecting hole  21   r  and is slightly tilted relative to Z-axis, the front end  20   a  is inserted from the open side of open route  17   k  formed at the front spring member  17 A and moved to the connecting hole  17   r.  Because the open route  17   k  is bent as a hook, even if the front end  20   a  is engaged in the middle of the open route  17   k  before it is fixated, the front end  20   a  will not fall off onto the outside of the connecting hole  17   r.  Next, the front end  20   a  is connected at the center of the connecting hole  17   r  via tin solder  22 , etc. with the front spring member  17 A. More specifically, after the tin solder  22  melt using a heating element such as electric soldering iron, laser, etc. is traversely attached to the circumference of the connecting hole  17   r  and the front end  20   a,  it is cooled, solidified and cured. Even the front end  20  of the spring member  20 , which is temporarily engaged in the middle of the open route  17   k,  can still dragged onto the center of the connecting hole  17   r  as the tin solder  22  is solidified. Subsequently, the front end  20   a  and the tin solder  22  are together fixated at the center of the connecting hole  17   r.  The back end  20   b  of the spring member  20  is firmly connect to the connecting hole  21   r  via a firm connection member  23  such as tin solder  22  or binder. 
         [0059]    In this way, no stress acts on the front spring member  17 A and the linear spring member  20 , and the spring member  20  may be easily mounted at the connecting hole  17  without damaging the front spring member  17 A and spring member  20 . By doing this, the lens  18  of the lens driver  10  with camera shake reducing function may held at the lens holder  13  in a state of facing Z-axis accurately, therefore, the focusing unit  11  may accurately swing in X-axis direction and Y-axis direction. 
         [0060]      FIG. 2  is a perspective view of a plate-like front spring member  17 C of a second embodiment. Furthermore, the structure of other members than the front spring member  17 C is the same as the structure of the lens driver  10  with camera shake reducing function of the first embodiment, and thus its illustration is omitted. 
         [0061]    The front spring member  17 C comprises: a ring-shaped inner holding portion  17   a;  an outer holding portion  17   b  in form of a box with four borders; a plurality of arms  17   c  which are located between the inner holding portion  17   a  and the outer holding portion  17   b  and which are repeatedly bended in radial and circumferential direction so as to connect the inner holding portion  17   a  and the outer holding portion  17   b;  connecting holes  17   r  which are formed on four corners of the outer holding portion  17   b;  and open routes  17   k  which is formed by cutting off a part of the connecting holes  17   r.    
         [0062]    The open routes  17   k  are orthogonal to the optical axis and are hook-shape. Furthermore, the open routes  17   k  extend from the connecting holes  17   r  generally parallel to the borders of outer holding portion  17   b,  and is opened towards the outside of the outer holding portion  17   b.  The width d 1  of the open route  17   k  is narrower than the outer diameter d 2  of the linear spring member  20 . 
         [0063]    As to the mounting methods of the spring members  20 , after the back end  20   b  is embedded into the connecting hole  21   r  and is slightly tilted relative to Z-axis, the front end  20   a  is pressed in from the open side of open route  17   k  formed at the front spring member  17 A. Subsequently, the open route  17   k  is pushed aside while making the connecting hole  17   r  of the front spring member  17 C and the circumference of the open route  17   k  elastically deformed, so that it is moved to the inner side of the connecting hole  17   r.  Because the width d 1  of the open route  17   k  is narrower than the outer diameter d 2  of the spring member  20 , even before fixating the front end  20   a,  the spring member  20  may still be temporarily engaged in the connecting hole  17   r  and will not fall off onto outside. 
         [0064]    As described above, in the lens driver  10  with camera shake reducing function in the second embodiment, still no stress is applied to the front spring member  17   c  and the linear spring member  20 , and the spring member  20  may be easily passed through (connect) the connecting hole  17   r  without damaging the front spring member  17 C or the spring member  20 . By doing this, the lens  18  of the lens driver  10  with camera shake reducing function may held at the lens holder  13  in a state of facing Z-axis accurately, therefore, the focusing unit  11  may accurately swing in X-axis direction and Y-axis direction. 
         [0065]      FIG. 3  is a perspective view of a plate-like front spring member  17 D of the third embodiment. Furthermore, other structure than the front spring member  17 D is the same as above, and hence it is omitted. 
         [0066]    The front spring member  17 D comprises: a ring-shaped inner holding portion  17   a;  an outer holding portion  17   b  in form of a box with four borders; a plurality of arms  17   c  which are located between the inner holding portion  17   a  and the outer holding portion  17   b  and which are repeatedly bended in radial and circumferential direction so as to connect the inner holding portion  17   a  and the outer holding portion  17   b;  connecting holes  17   r  which are formed on four corners of the outer holding portion  17   b;  and open routes  17   k  which is formed by cutting off a part of the connecting holes  17   r.    
         [0067]    The open route  17   k  is orthogonal to the optical axis  0 , and forms a linear shape on the front spring member  17 D, and it is opened from the connecting hole  17   r  towards the outside of the outer holding portion  17   b.  Furthermore, the width d 1  of the open route  17   k  is narrower than the outer diameter d 2  of the linear spring member  20 . An open route  17   k  is formed radially on a side of the connecting hole  17   r  and a notch  17   s  is formed radially on another side of the connecting hole  17   r.  That is, centered on the connecting hole  17   r,  an open route  17   k  is formed on one side and a notch  17   s  is formed on the 180°-shifted opposite side, i.e. another side. 
         [0068]    As to the mounting methods of the spring members  20 , after the back end  20   b  is embedded into the connecting hole  21   r  and is slightly tilted relative to Z-axis, the front end  20   a  is pressed in from the open side of open route  17   k  formed at the front spring member  17 D. Subsequently, the open route  17   k  is pushed aside while making the connecting hole  17   r  and the circumference of the open route  17   k  and the notch  17   s  elastically deformed, so that it is moved to the inner side of the connecting hole  17   r.  Because the width d 1  of the open route  17   k  is narrower than the outer diameter d 2  of the spring member  20 , even before fixating the front end  20   a,  the spring member  20  may still be temporarily engaged in the connecting hole  17   r  and will not fall off onto outside. 
         [0069]    As described above, in the lens driver  10  with camera shake reducing function in the third embodiment, still no stress is applied to the front spring member  170  and the linear spring member  20 , and the spring member  20  may be easily passed through (connect) the connecting hole  17   r  without damaging the front spring member  17 D or the spring member  20 . By doing this, the lens  18  of the lens driver  10  with camera shake reducing function may held at the lens holder  13  in a state of facing Z-axis accurately, therefore, the focusing unit  11  may accurately swing in X-axis direction and Y-axis direction. 
         [0070]      FIG. 4  is a perspective view of the main part of a lens driver  10  with camera shake reducing function of a variation of the first embodiment. In this embodiment, ends  20   a  on front side and ends  20   b  on back side of the spring members  20  pass through (connect) the connecting hole  16   r  of the magnet holder  16  and the connecting hole  21   r  of the base  21 , so as to hold the focusing unit  11  such that it may swing in X-axis direction and Y-axis direction, which is different from the first embodiment. That is, in this example, the ends  20   a  on front side of the spring members  20  are not connected to the front spring member  17 A. 
         [0071]    The magnet holder  16  further comprises: connecting holes  16   r  which are formed at the flange  16   f  on four corners of the magnet holder  16 ; and open routes  16   k  which are formed by cutting off a part of the connecting hole  16   r.  The open route  16   k  is orthogonal to the optical axis and is hook-shape. Furthermore, the open routes  16   k  extend outwards from the connecting hole  16   r  and are opened at the ends. 
         [0072]    As to the mounting methods of the spring members  20 , after the back end  20   b  is embedded into the connecting hole  21   r  and is slightly tilted relative to Z-axis, the front end  20   a  is inserted from the open side of open route  16   k  formed at the magnet holder  16  and moved to the inner side of connecting hole  16   r.  Furthermore, because the open route  16   k  is bent as a hook, even before the front end  20   a  is fixated, the spring member  20  may still be temporarily engaged in the middle of the open route  16   k,  and will not fall off onto the outside of the connecting hole  16   r.    
         [0073]    As described above, in the lens driver  10  with camera shake reducing function in the this embodiment, still no stress is applied to the linear spring member  20 , and the spring member  20  may be easily passed through (connect) the connecting hole  16   r  without damaging the front spring member  17 D or the spring member  20 . By doing this, the lens  18  of the lens driver  10  with camera shake reducing function may held at the lens holder  13  in a state of facing Z-axis accurately, therefore, the focusing unit  11  may accurately swing in X-axis direction and Y-axis direction. 
         [0074]      FIG. 5  is a perspective view of the main part of a lens driver  10  with camera shake reducing function of another variation of the first embodiment, in this embodiment, ends  20   a  on front side and ends  20   b  on back side of the spring members  20  pass through (connect) the connecting hole  16   r  of the magnet holder  16  and the connecting hole  21   r  of the base  21 , so as to hold the focusing unit  11  such that it may swing in X-axis direction and Y-axis direction, which is different from the first embodiment. That is, in this example, the ends  20   a  on front side of the spring members  20  are not connected to the front spring member  17 A. 
         [0075]    Connecting holes  16   r  are opened at the flange  16   f  on four corners of the magnet holder  16 . The base  21  comprises; connecting holes  21   r;  and open routes  21   k  which are formed by cutting off a part of the connecting holes  21   r.  The open routes  21   k  are orthogonal to the optical axis and are hook-shape. Furthermore, the open routes  21   k  extend from the connecting hole  21   r  and are opened outwards. 
         [0076]    As to the mounting methods of the spring members  20 , after the front end  20   a  is embedded into the connecting hole  16   r  from −Z side and is slightly tilted relative to Z-axis, the back end  20   b  is inserted from the open side of open route  21   k  formed at the base  21  and moved to the inner side of connecting hole  21   r.  Furthermore, because the open route  21   k  is bent as a hook, even before the back end  20   b  is fixated, the spring member  20  may still be temporarily engaged in the middle of the open route  21   k,  and will not fall off onto the outside of the connecting hole  21   r.    
         [0077]    The invention is explained using the above embodiments, but the scope of the invention is not limited to the scope recited in the above embodiments. Those skilled in the art may perform various alterations or improvement on the various embodiments. It is appreciated from the claims that these altered or improved embodiments also fall within the scope of the invention. 
         [0078]    For example, the open route  17   k,  the open route  21   k  may not only be arranged at one of the connecting hole  17   r  of the front spring member and the connecting hole  21   r  of the base  21 , but also may be arranged at the both connecting holes  17   r  and  21   r.