Abstract:
The present invention aims to provide a lens driving device capable of realizing the reduction of power consumption by improving the driving efficiency of an electromagnetic drive mechanism. The lens driving device includes: one or mores drive coils having one or more forward path sides and one or more return path sides, and drive magnets each having a forward path side magnet plate and a return path side magnet plate. The magnetization directions of the forward path side magnet plate and the return path side magnet plate of each drive magnets define an angle which is expanded towards the oppositely arranged one or more drive coils. The magnetic induction intensity applied to the drive coils from the drive magnets can be increased and improved, and thus powerful lorentz force can be effectively generated by the drive coils after being electrified.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a lens driving device used by a camera loaded in a mobile phone. 
         [0003]    2. Description of Related Art 
         [0004]    In recent years, mobile phones have various functions of internet communication, games and the like besides photographic function (cameras), so that the power consumption is increased. Moreover, in electromagnetic drive type lens driving device used for cameras, besides the function of auto focus, the structure with the function of shaking correction is also added, and the power consumption in the lens driving device is also increased. 
         [0005]    PCT patent application publication NO. WO2010/043078A1, Pub. date of Apr. 22, 2010 discloses a lens driving device as shown in  FIG. 6A to 6D .  FIG. 6A  is a perspective view of a lens driving device  30 ,  FIG. 6B  is an exploded view of the lens driving device  30 ,  FIG. 6C  is a perspective view of the main parts of an electromagnetic drive mechanism  31  in the lens driving device  30 , and  FIG. 6D  is a schematic diagram illustrating the magnetic field generated by drive magnets  31 M. Hereon, the optical axis direction of a lens  35  is set to be the Z axis direction (the object to be shot is at +Z side), and two directions forming right angles with Z axis and perpendicular to each other are set to be X axis direction and Y axis direction respectively. Moreover, in  FIG. 6C , the aftermentioned +X side drive magnet  31 MPX is partially illustrated through cutting so as to improve the visibility of the oppositely arranged +X side drive coil  31 CPX. 
         [0006]    The lens driving device  30  includes the functions of auto focus and shaking correction, so that the lens  35  moves along the Z axis direction, a shot image is focused in an unshown image sensor arranged at the back of the Z axis of the lens, and the lens  35  swings towards the X axis direction and the Y axis direction (for example, the lens  35  also swings towards the periphery of the axis parallel to the X axis and the periphery of the axis parallel to the Y axis respectively while rotating), so that the shot image in the image sensor is inhibited from shifting (camera shaking). 
         [0007]    As shown in  FIG. 6A , the lens driving device  30  is integrally formed in the shape of a cuboid, and the lens  35  is maintained at the central part of the lens driving device  30 . As shown in  FIG. 6B , the lens driving device  30  includes a lens support  32  for mounting the lens  35 , two platelike spring components  34  for supporting the lens support  32  in a suspended manner to be capable of moving, an electromagnetic drive mechanism  31  composed of the drive coils  31 C and the drive magnets  31 M, and a square frame-shaped magnet support  33  for supporting the drive magnets  31 M. 
         [0008]    As shown in  FIG. 6B  and  FIG. 6C , the drive coils  31 C are composed of the following components: a +X side drive coil  31 CPX which winds around the axis parallel to the X axis and is mounted on the +X side of the lens support  32 , a −X side drive coil  31 CMX which winds around the axis parallel to the X axis and is mounted on the −X side of the lens support  32 , a +Y side drive coil  31 CPY which winds around the axis parallel to the Y axis and is mounted on the +Y side of the lens support  32 , and a −Y side drive coil  31 CMY which winds around the axis parallel to the Y axis and is mounted on the −Y side of the lens support  32 . 
         [0009]    As shown in  FIG. 6C , the drive magnets  31 M are composed of the following components: a +X side drive magnet  31 MPX which is mounted in the +X side square frame of the magnet support  33  and is isolated from the +X side drive coil  31 CPX at an interval along the X axis direction and is arranged opposite to the +X side drive coil  31 CPX, a −X side drive magnet  31 MMX which is mounted in the −X side square frame of the magnet support  33  and is isolated from the −X side drive coil  31 CMX at an interval along the X axis direction and is arranged opposite to the −X side drive coil  31 CMX, a +Y side drive magnet  31 MPY which is mounted in the +Y side square frame of the magnet support  33  and is isolated from the +Y side drive coil  31 CPY at an interval along the Y axis direction and is arranged opposite to the +Y side drive coil  31 CPY, and a −Y side drive magnet  31 MMY which is mounted in the −Y side square frame of the magnet support  33  and is isolated from the −Y side drive coil  31 CMY at an interval along the Y axis direction and is arranged opposite to the −Y side drive coil  31 CMY. 
         [0010]    The +X side drive magnet  31 MPX, the −X side drive magnet  31 MMX, the +Y side drive magnet  31 MPY and the −Y side drive magnet  31 MMY are respectively and completely cut into two parts: a cuboid-shaped +Z side magnet plate  31 MA positioned in the +Z direction and a cuboid-shaped −Z side magnet plate  31 MB positioned in the −Z direction. 
         [0011]    The +X side drive coil  31 CPX, the −X side drive coil  31 CMX, the +Y side drive coil  31 CPY and the −Y side drive coil  31 CMY are respectively wound in the shapes of long circles, are arranged opposite to each other as a +Z side coil side  31 CA and a +Z side magnet plate  31 MA on one long side, and are arranged opposite to each other as a −Z side coil side  31 CB and a −Z side magnet plate  31 MB on the other long side. 
         [0012]    The platelike spring component  34  is formed in the shape of a universal joint, and is composed of a +Z side platelike spring component  34 F and a −Z side platelike spring component  34 B. The inner diameter part  34   a  of the +Z side platelike spring component  34 F is connected with the +Z side end part of the lens support  32 , and the outer diameter part  34   b  of the +Z side platelike spring component  34 F is connected with the +Z side end part of the magnet support  33 . The inner diameter part  34   a  of the −Z side platelike spring component  34 B is connected with the −Z side end part of the lens support  32 , and the outer diameter part  34   b  of the −Z side platelike spring component  34 B is connected with the −Z side end part of the magnet support  33 . As a result, when the platelike spring components  34  straightly moves towards the Z axis direction, the platelike spring component  34  is used for supporting the lens support  32  in the suspended manner so that the lens support  32  rotates in the axis direction forming a right angle with the Z axis, and the platelike spring component  34  can swing along with the lens support  32 . 
         [0013]    As shown in  FIG. 6C , the +Z side magnet plate  31 MA and the −Z side magnet plate  31 MB face the coil side  31 CA and the coil side  31 CB which are oppositely arranged. 
         [0014]    Specifically, the +Z side magnet plate  31 MA of the +X side drive magnet  31 MPX faces the +Z side coil side  31 CA of the +X side drive coil  31 CPX, is magnetized along the X axis direction, so that the side of the +Z side coil side  31 CA becomes an N pole. The −Z side magnet plate  31 MB of the +X side drive magnet  31 MPX faces the −Z side coil side  31 CB of the +X side drive coil  31 CPX, is reversely magnetized along the X axis direction, so that the side of the −Z side coil side  31 CB becomes an S pole. The +Z side magnet plate  31 MA of the −X side drive magnet  31 MMX faces the +Z side coil side  31 CA of the −X side drive coil  31 CMX, is magnetized along the X axis direction, so that the side of the +Z side coil side  31 CA becomes the N pole. The −Z side magnet plate  31 MB of the −X side drive magnet  31 MMX faces the −Z side coil side  31 CB of the −X side drive coil  31 CMX, is magnetized along the X axis direction, so that the side of the −Z side coil side  31 CB becomes an S pole. The +Z side magnet plate  31 MA of the +Y side drive magnet  31 MPY faces the +Z side coil side  31 CA of the +Y side drive coil  31 CPY, is magnetized along the Y axis direction, so that the side of the +Z side coil side  31 CA becomes the N pole. The −Z side magnet plate  31 MB of the +Y side drive magnet  31 MPY faces the −Z side coil side  31 CB of the +Y side drive coil  31 CPY, is magnetized along the Y axis direction, so that the side of the −Z side coil side  31 CB becomes an S pole. The +Z side magnet plate  31 MA of the −Y side drive magnet  31 MMY faces the +Z side coil side  31 CA of the −Y side drive coil  31 CMY, is magnetized along the Y axis direction, so that the side of the +Z side coil side  31 CA becomes the N pole. The −Z side magnet plate  31 MB of the −Y side drive magnet  31 MMY faces the −Z side coil side  31 CB of the −Y side drive coil  31 CMY, is magnetized along the Y axis direction, so that the side of the −Z side coil side  31 CB becomes an S pole. 
         [0015]    As mentioned above, the electromagnetic drive mechanism  31  is composed of the following four groups of components: an electromagnetic drive mechanism  31 PX on the +X side composed of the +X side drive coil  31 CPX and the +X side drive magnet  31 MPX, an electromagnetic drive mechanism  31 MX on the −X side composed of the −X side drive coil  31 CMX and the −X side drive magnet  31 MMX, an electromagnetic drive mechanism  31 PY on the +Y side composed of the +Y side drive coil  31 CPX and the +Y side drive magnet  31 MPY, and an electromagnetic drive mechanism  31 MY on the −Y side composed of the −Y side drive coil  31 CMY and the −Y side drive magnet  31 MMY. 
         [0016]    As shown in  FIG. 6D , the electromagnetic drive mechanism  31 PX on the +X side and the electromagnetic drive mechanism  31 MX on the −X side are open magnetic circuits composed of the +Z side magnet plate  31 MA and the −Z side magnet plate  31 MB which are adjacent along the Z axis direction, wherein the inner diameter side (the side of the +X side drive coil  31 CPX and the −X side drive coil  31 CMX in the figure) and the outer diameter side of the drive mechanism  31  are opened. 
         [0017]    Namely, on the inner diameter side of the electromagnetic drive mechanism  31 , magnetic induction lines sent from the +Z side magnet plate  31 MA are expanded towards the inner diameter direction of the electromagnetic drive mechanism  31  and are crossed with the +Z side coil side  31 CA, and then the direction of the magnetic induction lines is changed into the outer diameter direction of the electromagnetic drive mechanism  31 , so that the magnetic induction lines are crossed with the −Z side coil side  31 CB and are returned to the −Z side magnet plate  31 MB. Moreover, on the outer diameter side of the electromagnetic drive mechanism  31 , magnetic induction lines sent from the −Z side magnet plate  31 MB to the outer diameter direction of the electromagnetic drive mechanism  31  are changed into the direction facing inner diameter, and are returned to the +Z side magnet plate  31 MA. And then, in the electromagnetic drive mechanism  31 PX on the +X side and the electromagnetic drive mechanism  31 MX on the −X side, the magnetic induction intensity sent from the inner diameter side (the side of the +X side drive coil  31 CPX and the −X side drive coil  31 CMX) of the electromagnetic drive mechanism  31  and the magnetic induction intensity sent from the outer diameter side of the electromagnetic drive mechanism  31  are approximately same in degree. 
         [0018]    For example, when current in the −X axis direction (anticlockwise direction in +X axis direction) flows in the +X side drive coil  31 CPX in the electromagnetic drive mechanism  31 PX on the +X side, lorentz force in the +Z axis direction is generated on the +Z side coil side  31 CA of the +X side drive coil  31 CPX, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  31 CB. Moreover, when current in the +X axis direction flows in the −X side drive coil  31 CMX in the electromagnetic drive mechanism  31 MX on the −X side, lorentz force in the +Z axis direction is generated on the +Z side coil side  31 CA of the −X side drive coil  31 CMX, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  31 CB. 
         [0019]    Right now, if the current intensity when the +X side drive coil  31 CPX is electrified is the same as the current intensity when the −X side drive coil  31 CMX is electrified, the lens support  32  straightly moves towards the +Z axis direction; and if the current intensity when the +X side drive coil  31 CPX is electrified is different from the current intensity when the −X side drive coil  31 CMX is electrified, the lens support  32  straightly moves towards the +Z axis direction based on different electric quantities, and at the same time, the lens support  32  rotates and swings around the axis parallel to the Y axis (namely rotates and swings in the Y axis direction). 
         [0020]    Similarly, when current in the −Y axis direction (anticlockwise direction in +Y axis direction) flows in the +Y side drive coil  31 CPY in the electromagnetic drive mechanism  31 PY on the +Y side, lorentz force in the +Z axis direction is generated on the +Z side coil side  31 CA of the +Y side drive coil  31 CPY, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  31 CB. Moreover, when current in the +Y axis direction flows in the −Y side drive coil  31 CMY in the electromagnetic drive mechanism  31 MY on the −Y side, lorentz force in the +Z axis direction is generated on the +Z side coil side  31 CA of the −Y side drive coil  31 CMY, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  31 CB. 
         [0021]    Right now, if the current intensity when the +Y side drive coil  31 CPY is electrified is the same as the current intensity when the −Y side drive coil  31 CMY is electrified, the lens support  32  straightly moves towards the +Z axis direction; and if the if the current intensity when the +Y side drive coil  31 CPY is electrified is different from the current intensity when the −Y side drive coil  31 CMY is electrified, the lens support  32  straightly moves towards the +Z axis direction based on different electric quantities, and at the same time, the lens support  32  rotates and swings around the axis parallel to the X axis (namely rotates and swings in the X axis direction). 
         [0022]    In this way, the electromagnetic drive mechanism  31  can start the functions of auto focus and shaking correction at the same time, so that the lens  34  maintained on the lens support  32  straightly moves towards the Z axis direction, and rotates and swings in the direction forming the right angle with the Z axis. 
         [0023]    However, in the electromagnetic drive mechanism  31  formed as mentioned above, the efficiency of applying magnetic force is relatively low, and thus a magnetic field cannot be applied for the drive coils  31 C sufficiently. Moreover, as mentioned above, the electromagnetic drive mechanism  31  needs to carry out the operation of the two functions of auto focus (the lens  35  moves along the Z axis direction) and shaking correction (the lens  35  swings in the X axis direction and the Y axis direction), so that the power consumption is increased compared with a lens driving device with the function of auto focus only. Therefore, the operation of the electromagnetic drive mechanism  31  during the shooting of the camera needs a large amount of electric power, so that the problem that the consumption time of a rechargeable battery loaded in a mobile phone becomes short appears. Therefore, an electromagnetic drive mechanism with low power consumption is needed. 
       BRIEF SUMMARY OF THE INVENTION 
       [0024]    The present invention aims to provide a lens driving device with auto focus and shaking correction function and having low power consumption, the driving efficiency of an electromagnetic drive mechanism is improved. 
         [0025]    A lens driving device includes includes: one or mores drive coils having one or more forward path sides and one or more return path sides, and drive magnets each having a forward path side magnet plate and a return path side magnet plate. Each forward path side magnet plate is isolated from a corresponding one of the one or more forward path sides at an interval and is arranged opposite to the corresponding one of the one or more forward path sides. Each return path side magnet plate is isolated from a corresponding one of the one or more return path sides at an interval and is arranged opposite to the corresponding one of the one or more return path sides. The forward path side magnet plate and the return path side magnet plate of each drive magnets are magnetized respectively along different directions. The magnetization directions of the forward path side magnet plate and the return path side magnet plate of each drive magnets define an angle which is expanded towards the oppositely arranged one or more drive coils. 
         [0026]    Thus, the magnetic induction intensity applied to the drive coils from the drive magnets can be increased and improved, and thus powerful lorentz force can be effectively generated by the drive coils after being electrified. 
         [0027]    Moreover, as an embodiment of the present invention, there are several drive coils each is wound along a direction forming a right angle with an optical axis of a lens driven by the lens driving device, and each drive coil faces to and is isolated at an interval with a magnetic pole face of a corresponding one of the plurality of drive magnets along the direction forming the right angle with the optical axis. 
         [0028]    Thus, the lens straightly moves towards the direction of the optical axis, and the lens swings towards the direction forming the right angle with the optical axis, so that the two functions of auto focus and shaking correction can be efficiently started. 
         [0029]    Moreover, as another embodiment of the present invention, there are two drive coils wound around a direction parallel to an optical axis of a lens driven by the lens driving device. The forward path side magnet plate of each drive magnet is configured opposite to and isolated at an intervals with a magnetic pole face of one of the two drive coils along a direction forming a right angle with the optical axis of the lens, and the return path side magnet plate of each drive magnet is configured opposite to and isolated at an intervals with a magnetic pole face of the other one of the two drive coils along the direction forming a right angle with the optical axis of the lens. 
         [0030]    Thus, the lens straightly moves towards the direction of the optical axis, so that auto focus can be performed efficiently. 
         [0031]    Moreover, as further another embodiment of the present invention, there are several drive coils each wound around a direction parallel to an optical axis of a lens driven by the lens driving device, and each drive coil faces to and is isolated at an interval with a magnetic pole face of a corresponding one of the plurality of drive magnets along the direction parallel to the optical axis. 
         [0032]    Thus, the lens swings towards the direction forming the right angle with the optical axis, so that shaking correction can be performed efficiently. 
         [0033]    Moreover, as an embodiment of the present invention, there are a plurality of drive coils each wound around a direction parallel to an optical axis of a lens driven by the lens driving device, and each drive coil faces to and is isolated at an interval with a side face of a corresponding one of the plurality of drive magnets along the direction parallel to the optical axis; the side face of each drive magnet is adjacent with its magnetic pole face. 
         [0034]    Thus, the lens swings towards the direction forming the right angle with the optical axis, so that the operation of shaking correction can be performed efficiently. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) 
         [0035]    The foregoing and other exemplary purposes, aspects and advantages of the present invention will be better understood in principle from the following detailed description of one or more exemplary embodiments of the invention with reference to the drawings, in which: 
           [0036]      FIG. 1A  is a perspective view of a lens driving device in accordance with a first embodiment of the present invention. 
           [0037]      FIG. 1B  is an exploded view of the lens driving device of  FIG. 1A . 
           [0038]      FIG. 1C  is a perspective view of the main parts of an electromagnetic drive mechanism of the lens driving device of  FIG. 1A . 
           [0039]      FIG. 2A  is a schematic diagram illustrating the relationship of magnetization directions of the magnets and the coils of the lens driving device in the first embodiment. 
           [0040]      FIG. 2B  is a schematic diagram illustrating a magnetic field generated by the magnets of the lens driving device in the first embodiment. 
           [0041]      FIG. 2C  is a curve graph illustrating the magnetic induction intensity crossed with the drive coils in  FIG. 2A . 
           [0042]      FIG. 3A  is a perspective view of a lens driving device in accordance with a second embodiment of the present invention. 
           [0043]      FIG. 3B  is an exploded view of the lens driving device of  FIG. 3A . 
           [0044]      FIG. 3C  is a perspective view of the main parts of an electromagnetic drive mechanism of the lens driving device in the second embodiment of the present invention. 
           [0045]      FIG. 4A  is a perspective view of a lens driving device in accordance with a third embodiment of the present invention. 
           [0046]      FIG. 4B  is an exploded view of the lens driving device of  FIG. 4A . 
           [0047]      FIG. 4C  is a perspective view of the main parts of an electromagnetic drive mechanism of the lens driving device in the third embodiment of the present invention. 
           [0048]      FIG. 5A  is a perspective view of the main parts of an electromagnetic drive mechanism of the lens driving device in accordance of a fourth embodiment of the present invention. 
           [0049]      FIG. 5B  is a schematic diagram illustrating a magnetic field generated by the magnets of the lens driving device in the fourth embodiment. 
           [0050]      FIG. 5C  is a curve graph illustrating the magnetic induction intensity crossed with the drive coils in  FIG. 5A . 
           [0051]      FIG. 6A  is a perspective view of an existing lens driving device. 
           [0052]      FIG. 6B  is an exploded view of the existing lens driving device of  FIG. 6A . 
           [0053]      FIG. 6C  is a perspective view of the main parts of an electromagnetic drive mechanism of the existing lens driving device of  FIG. 6A . 
           [0054]      FIG. 6D  is a schematic diagram illustrating the relationship of magnetization directions of the magnets and the coils of the existing lens driving device. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0055]    The invention will now be described in detail through several embodiments with reference to the accompanying drawings. 
         [0056]      FIG. 1A  is a perspective view of a lens driving device  101  in the first embodiment of the present invention.  FIG. 1B  is an exploded view of the lens driving device  101 .  FIG. 1C  is a perspective view of an electromagnetic drive mechanism  111  in the lens driving device  101 . Moreover,  FIG. 2A  is a schematic diagram illustrating the magnetization of the magnets  111 M used in the electromagnetic drive mechanism  111 ,  FIG. 2B  is a schematic diagram illustrating the dispersion of a magnetic field generated by the drive magnets  111 M, and  FIG. 2C  is a curve graph illustrating the magnetic induction intensity crossed with the drive coils  111 C. Hereon, the optical axis direction of a lens  151  is set to be the Z axis direction (an object to be shot is at +Z side of the Z axis direction), and two directions forming right angles with Z axis and perpendicular with each other are set to be X axis direction and Y axis direction. Moreover, in  FIG. 1C , the +X side drive magnet  111 MPX is partially illustrated through cutting so as to improve the visibility of the oppositely arranged +X side drive coil  111 CPX. 
         [0057]    The lens driving device  101  has the functions of auto focus and shaking correction, so that the lens  151  can move in the Z axis direction efficiently, a shot image is focused in an unshown image sensor arranged at the back of the Z axis of the lens  151 , and the lens  151  can efficiently swing towards the X axis direction and the Y axis direction respectively (in the first embodiment, the lens  35  swings while rotating around the periphery of the axis parallel to the X axis and the periphery of the axis parallel to the Y axis respectively), so that the shot image in the image sensor is inhibited from shifting (mobile phone shaking). 
         [0058]    As shown in  FIG. 1A , the lens driving device  101  is integrally formed in the shape of a cuboid, and the lens  151  can be maintained at the central part of the lens driving device  30 . As shown in  FIG. 1B , the lens driving device  101  includes a lens support  121  for mounting the lens  151 , two platelike spring components  141  for supporting the lens support  121  in a suspended manner to be capable of moving along the optical axis direction of a lens  151 , an electromagnetic drive mechanism  111  including four drive coils  111 C and four drive magnets  111 M, and a square frame-shaped magnet support  131  for supporting the drive magnets  111 M. 
         [0059]    The drive coils  111 C are composed of the following components: a +X side drive coil  111 CPX which winds around the axis parallel to the X axis and is mounted on the +X side of the lens support  121 , a −X side drive coil  111 CMX which winds around the axis parallel to the X axis and is mounted on the −X side of the lens support  121 , a +Y side drive coil  111 CPY which winds around the axis parallel to the Y axis and is mounted on the +Y side of the lens support  121 , and a −Y side drive coil  111 CMY which winds around the axis parallel to the Y axis and is mounted on the −Y side of the lens support  121 . 
         [0060]    As shown in  FIG. 1C , the drive magnets  111 M are composed of the following components: a +X side drive magnet  111 MPX which is mounted in a +X side square frame of the magnet support  131  and is isolated from the +X side drive coil  111 CPX at an interval along the X axis direction and is arranged opposite to the +X side drive coil  111 CPX, a −X side drive magnet  111 MMX which is mounted in a −X side square frame of the magnet support  131  and is isolated from the −X side drive coil  111 CMX at an interval along the X axis direction and is arranged opposite to the −X side drive coil  111 CMX, a +Y side drive magnet  111 MPY which is mounted in a +Y side square frame of the magnet support  131  and is isolated from the +Y side drive coil  111 CPY at an interval along the Y axis direction and is arranged opposite to the +Y side drive coil  111 CPY, and a −Y side drive magnet  111 MMY which is mounted in a −Y side square frame of the magnet support  131  and is isolated from the −Y side drive coil  111 CMY at an interval along the Y axis direction and is arranged opposite to the −Y side drive coil  111 CMY. 
         [0061]    The +X side drive magnet  111 MPX, the −X side drive magnet  111 MMX, the +Y side drive magnet  111 MPY and the −Y side drive magnet  111 MMY are completely formed to be the shapes of cuboids when viewed form the sides of +Z direction, and each is cut/divided into a +Z side magnet plate  111 MA as a forward path side magnet plate and a −Z side magnet plate  111 MB as a return path side magnet plate. The +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB are stacked together in the Z axis direction (the +Z side magnet plate  111 MA is at the +Z side, and the −Z side magnet plate  111 MB is at the −Z side). The forward path side refers to the side where the magnetic field lines are sent out from the +Z side magnet plate  111 MA and crossed with a +Z side of the drive coil. The return path side refers to the side where the magnetic field lines turn round and crossed with the −Z side of the drive coil and then go back the −Z side magnet plate  111 MB. 
         [0062]    Each of the +X side drive coil  111 CPX, the −X side drive coil  111 CMX, the +Y side drive coil  111 CPY and the −Y side drive coil  111 CMY for forming the drive coil  111 C is wound in a shape of a long circle which has two parallel long sides and two short circular arc sides connecting the ends of the long sides. The +Z side coil side  111 CA as one long side of the drive coil  111 C is at the forward path side, and is arranged opposite to the +Z side magnet plate  111 MA. Moreover, the −Z side coil side  111 CB as the other long side of the drive coil  111 C is at the return path side, and is arranged opposite to the −Z side magnet plate  111 MB. 
         [0063]    The platelike spring components  141  are formed in the shapes of universal joints, and are composed of a +Z side platelike spring component  141 F and a −Z side platelike spring component  141 B. The inner diameter part  141   a  of the +Z side platelike spring component  141 F is connected with the +Z side end part of the lens support  121 , and the outer diameter part  141   b  of the +Z side platelike spring component  141 F is connected with the +Z side end part of the magnet support  131 . The inner diameter part  141   a  of the −Z side platelike spring component  141 B is connected with the −Z side end part of the lens support  121 , and the outer diameter part  141   b  of the −Z side platelike spring component  141 B is connected with the −Z side end part of the magnet support  131 . The platelike spring component  141  is used for supporting the lens support  121  in the suspended manner so that the lens support  121  can rotate and swing in a axis direction forming a right angle with the Z axis when the lens support  121  straightly moves towards the Z axis direction. 
         [0064]    As shown in  FIG. 2A , the +Z side magnet plate  111 MA of the +X side drive magnet  111 MPX and the +Z side coil side  111 CA of the +X side drive coil  111 CPX are arranged opposite to each other along the X axis direction. The −Z side magnet plate  111 MB of the +X side drive magnet  111 MPX and the −Z side coil side  111 CB of the +X side drive coil  111 CPX are arranged opposite to each other along the X axis direction. When viewed from a plane including the X axis and the Z axis, the +Z side magnet plate  111 MA is magnetized along a P axis direction which is inclined from the X axis (that is, inclined in relative to the X axis) and as shown in an arrow PP, and an N pole is formed on the side of the +Z side coil side  111 CA. When viewed from a plane including the X axis and the Z axis, the −Z side magnet plate  111 MB is magnetized along a Q axis direction which is inclined from the X axis (that is, inclined in relative to the X axis) and as shown in an arrow QQ, and an S pole is formed on the side of the −Z side coil side  111 CB. In other words, the magnetization direction of the +Z side magnet plate  111 MA and the magnetization direction of the −Z side magnet plate  111 MB are mutually different directions, and the two magnet plates are magnetized slantly in the P axis direction and the Q axis direction respectively, so that an expansion angle θ is defined by the magnetization directions of the +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB. The expansion direction of the expansion angle θ is towards the width direction (in the Z axis direction) of the drive coil whose +Z side coil side  111 CA and the −Z side coil side  111 CB are oppositely arranged with the +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB, respectively. Namely, the expansion angle θ defined by the magnetization directions of the +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB is expanded (widened) towards the +Z side coil side  111 CA and the −Z side coil side  111 CB which are arranged opposite to the magnet plates  111 MA and  111 MB mutually. 
         [0065]    Graphical expression is omitted, similar to the above description, the +Z side magnet plate  111 MA of the −X side drive magnet  111 MMX is magnetized slantly towards the width direction of the +Z side coil side  111 CA of the −X side drive coil  111 CMX (that is, slant from the +X axis towards the +Z axis), so that the N pole is formed on the side of the +Z side coil side  111 CA. The −Z side magnet plate  111 MB of the −X side drive magnet  111 MMX is magnetized slantly towards the width direction of the −Z side coil side  111 CB of the −X side drive coil  111 CMX (that is, slant from the +X axis towards the −Z axis), so that the S pole is formed on the side of the −Z side coil side  111 CB. The +Z side magnet plate  111 MA of the +Y side drive magnet  111 MPY is magnetized slantly in the width direction of the +Z side coil side  111 CA of the +Y side drive coil  111 CPY, so that the N pole is formed on the side of the +Z side coil side  111 CA. The −Z side magnet plate  111 MB of the +Y side drive magnet  111 MPY is magnetized slantly in the width direction of the −Z side coil side  111 CB of the +Y side drive coil  111 CPY, so that the S pole is formed on the side of the −Z side coil side  111 CB. The +Z side magnet plate  111 MA of the −Y side drive magnet  111 MMY is magnetized slantly in the width direction of the +Z side coil side  111 CA of the −Y side drive coil  111 CMY, so that the N pole is formed on the side of the +Z side coil side  111 CA. The −Z side magnet plate  111 MB of the −Y side drive magnet  111 MMY is magnetized slantly in the width direction of the −Z side coil side  111 CB of the −Y side drive coil  111 CMY, so that the S pole is formed on the side of the −Z side coil side  111 CB. 
         [0066]    As mentioned above, the electromagnetic drive mechanism  111  includes the following four groups of electromagnetic drive mechanisms: the electromagnetic drive mechanism  111 PX on the +X side composed of the +X side drive coil  111 CPX and the +X side drive magnet  111 MPX, the electromagnetic drive mechanism  111 MX on the −X side composed of the −X side drive coil  111 CMX and the −X side drive magnet  111 MMX, the electromagnetic drive mechanism  111 PY on the +X side composed of the +Y side drive coil  111 CPY and the +Y side drive magnet  111 MPY, and the electromagnetic drive mechanism  111 MY on the −Y side composed of the −Y side drive coil  111 CMY and the −Y side drive magnet  111 MMY. 
         [0067]    The distribution state of magnetic induction lines in the electromagnetic drive mechanism  111 PX on the +X side and the electromagnetic drive mechanism  111 MX on the −X side of the electromagnetic drive mechanism  111  is expressed as a magnetic figure, and is as shown in  FIG. 2B . As shown in  FIG. 2B , the electromagnetic drive mechanism  111 PX on the +X side and the electromagnetic drive mechanism  111 MX on the −X side are open magnetic circuits composed of the +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB which are adjacent along the Z axis direction, the inner diameter side (the side of the +X side drive coil  111 CPX and the −X side drive coil  111 CMX) and the outer diameter side of the drive mechanism  111  are opened. 
         [0068]    Namely, on the inner diameter side of the electromagnetic drive mechanism  111 , the magnetic induction lines sent from the +Z side magnet plate  111 MA are expanded towards the inner side of the electromagnetic drive mechanism  111  and are crossed with the +Z side coil side  111 CA; and then after the direction of the magnetic induction lines is changed into the outer diameter direction of the electromagnetic drive mechanism  111 , the magnetic induction lines are crossed with the −Z side coil side  111 CB and are returned to the −Z side magnet plate  111 MB. Moreover, on the outer diameter side of the electromagnetic drive mechanism  111 , the magnetic induction lines sent from the −Z side magnet plate  111 MB to the outer diameter direction of the electromagnetic drive mechanism  111  are returned to the +Z side magnet plate  111 MA. Hereon, the +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB are magnetized slantly in the P axis direction and the Q axis direction respectively, and the expansion angle theta (θ) is formed. Thus, in the electromagnetic drive mechanism  111 PX on the +X side and the electromagnetic drive mechanism  111 MX on the −X side, the magnetic induction intensity sent towards the inner diameter side (the side of the +X side drive coil  111 CPX and the −X side drive coil  111 CMX) of the electromagnetic drive mechanism  111  is improved, and the amount of magnetic induction lines crossed with the +Z side coil side  111 CA and the −Z side coil side  111 CB respectively is increased. 
         [0069]    The driving force generated by the +X side drive coil  111 CPX and the −X side drive coil  111 CMX as shown in  FIG. 2B  depends on the intensity of the lorentz force in the Z axis direction generated by the currents flowing in the +Z side coil side  111 CA and the −Z side coil side  111 CB located in the magnetic field along the Y axis direction. Namely, the driving efficiency of the electromagnetic drive mechanism  111 PX on the +X side and the electromagnetic drive mechanism  111 MX on the −X side depends on the size/amount of the crossed X axis direction component of the magnetic induction intensity. 
         [0070]    In  FIG. 2C , the X axis direction components of the magnetic induction intensity when the expansion angle theta is 0 degree, 40 degrees and 80 degrees respectively are illustrated in a curve manner in the area the magnetic field lines crossed with the +Z side coil side  111 CA and the −Z side coil side  111 CB respectively (between the point U and the point V in the  FIG. 2B ). The dotted line (MD-0) in the figure illustrates the magnetic induction intensity when the magnetization direction is not expanded, namely the expansion angle is 0 degree (in other words, the drive magnet  31 MPX of the electromagnetic drive mechanism  31  based on the prior art is magnetized along the X axis direction), and the fine line (MD-40) illustrates the magnetic induction intensity when the expansion angle theta is 40 degrees, and the heavy line (MD-80) illustrates the magnetic induction intensity when the expansion angle theta is 80 degrees. 
         [0071]    It is clear that the magnetization directions of the +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB are expanded facing the +X side drive coil  111 CPX or the −X side drive coil  111 CMX which is oppositely arranged, so that the magnetic induction intensity crossed with the +X side drive coil  111 CPX and the −X side drive coil  111 CMX respectively can be improved, and the lorentz force generated by utilizing the currents flowing in these drive coils is improved, so that the driving efficiency of the electromagnetic drive mechanism  111 PX on the +X side and the electromagnetic drive mechanism  111 MX on the −X side can be improved. 
         [0072]    Similarly, in the electromagnetic drive mechanism  111 PY on the +Y side and the electromagnetic drive mechanism  111 MY on the −Y side, the magnetization directions of the +Z side magnet plate  111 MA and the −Z side magnet plate  111 MB are expanded respectively relative to the +Y side drive coil  111 CPY and the −Y side drive coil  111 CMY which are oppositely arranged, so that the magnetic induction intensity crossed with the +Y side drive coil  111 CPY and the −Y side drive coil  111 CMY respectively can also be improved, and thus the driving efficiency of the electromagnetic drive mechanism  111  is integrally improved. 
         [0073]    Namely, when current in the −X axis direction (anticlockwise direction in +X axis direction) flows in the +X side drive coil  111 CPX in the electromagnetic drive mechanism  111 PX on the +X side, lorentz force in the +Z axis direction is generated on the +Z side coil side  111 CA of the +X side drive coil  111 CPX, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  111 CB. Moreover, when current in the +X axis direction (clockwise direction in +X axis direction) flows in the −X side drive coil  111 CMX in the electromagnetic drive mechanism  111 MX on the −X side, lorentz force in the +Z axis direction is generated on the +Z side coil side  111 CA of the −X side drive coil  111 CMX, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  111 CB. 
         [0074]    Right now, if the sizes of the current electrified to the +X side drive coil  111 CPX and the −X side drive coil  111 CMX are the same, the lens support  12  straightly moves towards the +Z axis direction. On the other hand, if the sizes of the currents are different, the lens support  121  straightly moves towards the +Z axis direction, and meanwhile the lens support  121  also rotates and swings around the axis parallel to the Y axis (namely rotates and swings in the Y axis direction) based on the different amount of the currents. 
         [0075]    Similarly, when current in the −Y axis direction (anticlockwise direction in +Y axis direction) flows in the +Y side drive coil  111 CPY in the electromagnetic drive mechanism  111 PY on the +Y side, lorentz force in the +Z axis direction is generated on the +Z side coil side  111 CA of the +Y side drive coil  111 CPY, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  111 CB. Moreover, when current in the +Y axis direction (clockwise direction in +Y axis direction) flows in the −Y side drive coil  111 CMY in the electromagnetic drive mechanism  111 MY on the −Y side, lorentz force in the +Z axis direction is generated on the +Z side coil side  111 CA of the −Y side drive coil  111 CMY, and lorentz force in the +Z axis direction is also generated on the −Z side coil side  111 CB. 
         [0076]    Right now, if the size of the current flowing in the +Y side drive coil  111 CPY is the same as the size of the current flowing in the −Y side drive coil  111 CMY, the lens support  121  straightly moves towards the +Z axis direction; and if the if the sizes of the currents are different, the lens support  32  straightly moves towards the +Z axis direction, and at the same time, the lens support  32  rotates and swings around the axis parallel to the X axis (namely rotates and swings in the X axis direction) based on different electric quantities. 
         [0077]    In this way, the electromagnetic drive mechanism  111  can play the roles of auto focus and shaking correction effectively at the same time, so that the lens  151  maintained on the lens support  121  efficiently and straightly moves towards the Z axis direction, and rotates and swings in the direction forming the right angle with the Z axis. 
         [0078]      FIG. 3A  is a perspective view of the lens driving device  102  in the second embodiment of the present invention,  FIG. 3B  is an exploded view of the lens driving device  102 , and  FIG. 3C  is a perspective view of an electromagnetic drive mechanism  112  in the lens driving device  102 . Hereon, similar to the first embodiment, the optical axis direction of the lens (unshown) is set to be the Z axis direction (the object to be shot is at the +Z side), the two directions forming the right angles with the Z axis and perpendicular with each other are set to be the X axis direction and the Y axis direction respectively. Further more, a coordinate axis which is set by rotating the X axis direction towards the +Y axis direction around +Z axis (in other words, rotating the X axis around Z axis by +45 degrees) by 45 degrees is set to be K axis, and a coordinate axis which is set by rotating the Y axis direction towards the −X axis direction by 45 degrees around +Z axis (in other words, rotating the Y axis around Z axis by +45 degrees) is set to be L axis. Moreover, in  FIG. 3C , the +X side drive magnet  112 MPK is partially illustrated through cutting so as to improve the visibility of the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ which are oppositely arranged. 
         [0079]    The lens driving device  102  has the function of auto focus, and can enable the lens to efficiently move towards the Z axis direction, so that the shot image is focused in the unshown image sensor. 
         [0080]    As shown in  FIG. 3A , the lens driving device  102  is integrally formed in the shape of a cuboid. The lens driving device  102  includes a lens support  122  for mounting the lens  151  of which the unshown lens is maintained at the central part, two platelike spring components  142  for supporting the lens support  122  in the suspended manner to be capable of moving in the Z axis direction, an electromagnetic drive mechanism  112  composed of the drive coils  112 C and the drive magnets  112 M, and a square frame-shaped magnet support  132  for supporting the drive magnets  112 M. 
         [0081]    The drive coils  112 C include the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ. The +Z side drive coil  112 CPZ is wound around the axis parallel to the Z axis along the outer diameter part of the lens support  122  formed in the shape of an octagonal barrel and is mounted on the +Z side as the forward path side. The −Z side drive coil  112 CMZ is wound along the outer diameter part of the lens support  122  and is mounted on the −Z side as the return path side. 
         [0082]    Each platelike spring component  142  includes the +Z side platelike spring component  142 F and the −Z side platelike spring component  142 B. Both of the +Z side platelike spring component  142 F and the −Z side platelike spring component  142 B include an inner diameter part  142   a , an outer diameter part  142   b , four the wrist parts  142   c  each repeatedly extends in the peripheral direction and the diameter direction and connects the inner diameter part  142   a  and the outer diameter part  142   b . The inner diameter part  142   a  of the +Z side platelike spring component  142 F is connected with the +Z side end part of the lens support  122 , and the outer diameter part  142   b  of the +Z side platelike spring component  142 F is connected with the +Z side end part of the magnet support  132 . The inner diameter part  142   a  of the −Z side platelike spring component  142 B is connected with the −Z side end part of the lens support  122 , and the outer diameter part  142   b  of the −Z side platelike spring component  142 B is connected with the −Z side end part of the magnet support  132 . The spring component  142  is used for supporting the lens support  122  to be capable of moving in the Z axis direction in the suspended mode. 
         [0083]    As shown in  FIG. 3C , the drive magnets  112 M include a +K side drive magnet  112 MPK mounted at the +K side corner part of the magnet support  132 , a −K side drive magnet  112 MMK mounted at the −K side corner part of the magnet support  132 , a +L side drive magnet  112 MPL mounted at the +L side corner part of the magnet support  132 , and a −L side drive magnet  112 MML mounted at the −L side corner part of the magnet support  132 . 
         [0084]    The +K side drive magnet  112 MPK, the −K side drive magnet  112 MMK, the +L side drive magnet  112 MPL and the −L side drive magnet  112 MML are formed in the shapes of triangular prisms adjacent with one another around the Z direction respectively, and each is cut into a +Z side magnet plate  112 MA as the forward path side magnet plate and a −Z side magnet plate  112 MB as the return path side magnet plate respectively. That is, when viewed in the optical axis of the lens, each of the +K side drive magnet  112 MPK, the −K side drive magnet  112 MMK, the +L side drive magnet  112 MPL and the −L side drive magnet  112 MML is looked as a right triangle, and the hypotenuse of the right triangle faces to the drive coils  112 C. 
         [0085]    The +Z side drive coil  112 CPZ as the forward path side and the +Z side magnet plate  112 MA are isolated at an interval and are arranged opposite to each other in the radial direction, and the −Z side drive coil  112 CMZ as the return path side and the −Z side magnet plate  112 MB are isolated at an interval and are arranged opposite to each other in the radial direction. 
         [0086]    When viewed from a plane including the K axis and the Z axis, the +Z side magnet plate  112 MA in the +K side drive magnet  112 MPK is magnetized slantly along a direction inclined from the K axis, so that the N pole is formed on the side of the +Z side drive coil  112 CPZ. When viewed from a plane including the K axis and the Z axis, the −Z side magnet plate  112 MB is magnetized slantly along a direction inclined from the K axis, so that the S pole is formed on the side of the −Z side drive coil  112 CMZ. Namely, the +Z side magnet plate  112 MA and the −Z side magnet plate  112 MB are magnetized slantly in the manner that an intersection angle of the magnetization directions of the +Z side magnet plate  112 MA and the −Z side magnet plate  112 B is expanded at a certain angle towards the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ which are arranged opposite to each other. 
         [0087]    Similarly, when viewed from a plane including the K axis and the Z axis, the +Z side magnet plate  112 MA in the −K side drive magnet  112 MMK is magnetized slantly in a direction inclined from the K axis, so that the N pole is formed on the side of the +Z side drive coil  112 CPZ; and the −Z side magnet plate  112 MB is magnetized slantly in a direction inclined from the K axis, so that the S pole is formed on the side of the −Z side drive coil  112 CMZ. Moreover, when viewed from a plane including the Z axis and the L axis, the +Z side magnet plate  112 MA in the +L side drive magnet  112 MPL is magnetized slantly in a direction inclined from the L axis, so that the N pole is formed on the side of the +Z side drive coil  112 CPZ; and the −Z side magnet plate  112 MB is magnetized slantly in a direction inclined from the L axis, so that the S pole is formed on the side of the −Z side drive coil  112 CMZ. When viewed from a plane including the Z axis and the L axis, the +Z side magnet plate  112 MA in the −L side drive magnet  112 MML is magnetized slantly in a direction inclined from the L axis, so that the N pole is formed on the side of the +Z side drive coil  112 CPZ; and the −Z side magnet plate  112 MB is magnetized slantly in a direction inclined from the L axis, so that the S pole is formed on the side of the −Z side drive coil  112 CMZ. 
         [0088]    As mentioned above, the electromagnetic drive mechanism  112  includes the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ, the +K side drive magnet  112 MPK, the −K side drive magnet  112 MMK, the +L side drive magnet  112 MPL and the −L side drive magnet  112 MML. 
         [0089]    In the second embodiment, the +Z side magnet plate  112 MA and the −Z side magnet plate  112 MB are magnetized slantly in the manner that the magnetization directions of the +Z side magnet plate  112 MA and the −Z side magnet plate  112 MB form a certain expanded angle towards a winding width direction (in the Z axis direction) of the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ. And then, on the inner diameter side of the electromagnetic drive mechanism  112 , the magnetic induction lines sent from the +Z side magnet plate  112 MA are expanded towards the inner side of the electromagnetic drive mechanism  112  and are crossed with the +Z side drive coil  112 CPZ; and after the magnetic induction lines are changed in the outer diameter direction of the electromagnetic drive mechanism  112 , the magnetic induction lines are crossed with the −Z side drive coil  112 CMZ and are returned to the −Z side magnet plate  112 MB. Moreover, on the outer diameter side of the electromagnetic drive mechanism  112 , the magnetic induction lines sent from the −Z side magnet plate  112 MB to the outer diameter direction of the electromagnetic drive mechanism  112  are returned to the +Z side magnet plate  112 MA. Therefore, the magnetic induction intensity sent to the side of the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ of the electromagnetic drive mechanism  112  can be improved, and the amount of magnetic induction lines crossed with the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ respectively is increased. 
         [0090]    As a result, the lorentz force generated by utilizing the current flowing in the +Z side drive coil  112 CPZ and the −Z side drive coil  112 CMZ is improved, and the driving efficiency of the electromagnetic drive mechanism  112  can be improved. 
         [0091]    Thus, in the lens driving device  102  in the second embodiment, the electromagnetic drive mechanism  112  can also utilize strong driving force, so that the lens maintained on the lens support  122  can efficiently and straightly move towards the Z axis direction. 
         [0092]      FIG. 4A  is a perspective view of the lens driving device  103  in the third embodiment of the present invention,  FIG. 4B  is an exploded view of the lens driving device  103 , and  FIG. 4C  is perspective views of an electromagnetic drive mechanism  113  for shaking correction and an electromagnetic drive mechanism  173  for focus in the lens driving device  103 . Moreover, in  FIG. 4C , the +X side drive magnet  111 MPX for shaking correction is partially illustrated through cutting so as to improve the visibility of the oppositely arranged +X side drive coil  113 CPX for shaking correction. 
         [0093]    The lens driving device  103  has the functions of auto focus and shaking correction, so that the unshown lens can move towards the Z axis direction so as to focus the shot image in the unshown image sensor, and the lens can efficiently swing in the X axis direction and the Y axis direction respectively (straightly swings in the X axis direction and Y axis direction in the third embodiment) so as to inhibit the shot image in the image sensor from shifting. 
         [0094]    As shown in  FIG. 4A , the lens driving device  103  is integrally formed in the shape of a cuboid, and the unshown lens is maintained at the central part of the lens driving device  103 . The lens driving device  103  includes: a lens support  123  for mounting the lens; two platelike spring components  143  for supporting the lens support  123  in the suspended manner to be capable of moving in the Z axis direction; the electromagnetic drive mechanism  173  for focus composed of focus coils  173 C and focus magnets  173 M; the electromagnetic drive mechanism  113  for shaking correction composed of shaking correction coils  113 C and shaking correction magnets  113 M; a square frame-shaped magnet support  133  for supporting the focus magnets  173 M and the shaking correction magnets  113 M; a base substrate  193  for mounting the shaking correction coils  113 C; and linear spring components  183  for connecting the platelike spring components  143  with the base substrate  193  and supporting the lens support  123  in the suspended manner to be capable of swinging in the X axis direction and the Y axis direction respectively. 
         [0095]    The focus coils  173 C are wound around the axis parallel to the Z axis, and are mounted to the outer diameter part of the lens support  123  formed in the shape of a barrel. The four focus magnets  173 M are formed in the shapes of cuboids, are mounted inside the +X side square frame, −X side square frame, +Y side square frame and the −Y side square frame of the magnet support  133  respectively, and are isolated from the focus coils  173 C at intervals in the radial direction and are arranged opposite to the focus coils  173 C. 
         [0096]    The base substrate  193  is a square platelike component with a circular opening defined in the Z axis direction in the central part. The shaking correction coils  113 C are mounted to the +Z side face of the base substrate  193 . The shaking correction coils  113 C include: a +X side drive coil  113 CPX wound around the axis parallel to the Z axis and mounted close the +X side of the base substrate  193 ; a −X side drive coil  113 CMX wound around the axis parallel to the Z axis and mounted close the −X side of the base substrate  193 ; a +Y side drive coil  113 CPY wound around the axis parallel to the Z axis and mounted close the +Y side of the base substrate  193 ; and a −Y side drive coil  113 CMY wound around the axis parallel to the Z axis and mounted close the −Y side of the base substrate  193 ; and these drive coil components for shaking correction are all wound in the shapes of long circles. 
         [0097]    The shaking correction magnets  113 M are mounted to the −Z side end part of the magnet support  133 . As shown in  FIG. 4C , the shaking correction magnets  113 M include: a +X side drive magnet  113 MPX assembled on the +X side; a −X side drive magnet  113 MMX assembled on the −X side; a +Y side drive magnet  113 MPY of assembled on the +Y side; and a −Y side drive magnet  113 MMY assembled on the −Y side. 
         [0098]    The +X side drive magnet  113 MPX and the −X side drive magnet  113 MMX are formed in the shapes of cuboids adjacent to each other along the X direction, and are cut into a magnet plate  113 MA as a forward path side magnet plate  113 MA on the inner diameter side and a magnet plate  113 MB as a return path side magnet plate on the outer diameter side respectively. Similarly, the +Y side drive magnet  113 MPY and the −Y side drive magnet  113 MMY are formed in the shapes of cuboids adjacent to each other along the Y direction, and are cut into a magnet plate  113 MA as a forward path side magnet plate  113 MA on the inner diameter side and a magnet plate  113 MB as a return path side magnet plate on the outer diameter side respectively. 
         [0099]    One long side of the +X side drive coil  113 CPX mounted close the +X side of the base substrate  193 , namely an inner diameter side coil side  113 CA, and the inner diameter side magnet plate  113 MA of the +X side drive magnet  113 MPX mounted to the magnet support  133  are isolated at an interval along the Z axis and are arranged opposite to each other. The outer diameter side coil side  113 CB as the other long side and the outer diameter side magnet plate  113 MB are isolated at an interval along the Z axis direction and are arranged opposite to each other. One long side of the −X side drive coil  113 CMX mounted close the −X side of the base substrate  193 , namely an inner diameter side coil side  113 CA, and the inner diameter side magnet plate  113 MA of the −X side drive magnet  113 MMX mounted to the magnet support  133  are isolated at an interval along the Z axis and are arranged opposite to each other, and the outer diameter side coil side  113 CB as the other long side and the outer diameter side magnet plate  113 MB are isolated at an interval along the Z axis direction and are arranged opposite to each other. 
         [0100]    One long side of the +Y side drive coil  113 CPY mounted close the +Y side of the base substrate  193 , namely an inner diameter side coil side  113 CA, and the inner diameter side magnet plate  113 MA of the +Y side drive magnet  113 MPY mounted to the magnet support  133  are isolated at an interval along the Z axis and are arranged opposite to each other, and the outer diameter side coil side  113 CB as the other long side and the outer diameter side magnet plate  113 MB are isolated at an interval along the Z axis direction and are arranged opposite to each other. One long side of the −Y side drive coil  113 CMY mounted close the −Y side of the base substrate  193 , namely an inner diameter side coil side  113 CA, and the inner diameter side magnet plate  113 MA of the −Y side drive magnet  113 MMY mounted to the magnet support  133  are isolated at an interval along the Z axis and are arranged opposite to each other, and the outer diameter side coil side  113 CB as the other long side and the outer diameter side magnet plate  113 MB are isolated at an interval along the Z axis direction and are arranged opposite to each other. 
         [0101]    In this way, the shaking correction coils  113 C are composed of the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY. Moreover, the inner diameter side coil side  113 CA as one long side is formed to be the forward path side, and is arranged opposite to the inner diameter side magnet plate  113 MA; and the outer diameter side coil side  113 CB as the other long side is formed to be the return path side, and is arranged opposite to the outer diameter side magnet plate  113 MB. 
         [0102]    Each platelike spring component  143  includes the +Z side platelike spring component  143 F and the −Z side platelike spring component  143 B. Both of the +Z side platelike spring component  143 F and the −Z side platelike spring component  143 B include an inner diameter part  143   a , an outer diameter part  143   b , four wrist parts  143   c  extending along the peripheral direction and connecting the inner diameter part  143   a  and the outer diameter part  143   b . The inner diameter part  143   a  of the +Z side platelike spring component  143 F is connected with the +Z side end part of the lens support  123 , and the outer diameter part  143   b  of the +Z side platelike spring component  143 F is connected with the +Z side end part of the magnet support  133 . The inner diameter part  143   a  of the −Z side platelike spring component  143 B is connected with the −Z side end part of the lens support  123 , and the outer diameter part  143   b  of the −Z side platelike spring component  143 B is connected with the −Z side end part of the magnet support  133 . The spring component  143  is used for supporting the lens support  123  to be capable of moving in the Z axis direction in the suspended manner. 
         [0103]    The linear spring components  183  are linear components extending along the Z axis direction so as to connect the four corners of the +Z side platelike spring component  143 F of the platelike spring component  143  with the four corners of the base substrate  193 , and the lens support  123  is supported to be capable of swinging in the X axis direction and the Y axis direction respectively in the suspended manner. 
         [0104]    When viewed from a plane including the X axis and the Z axis, the inner diameter side magnet plate  113 MA in the +X side drive magnet  113 MPX is magnetized slantly in the direction inclined from the Z axis, so that the N pole is formed on the side of the inner diameter side drive coil side  113 CA. The outer diameter side magnet plate  113 MB is magnetized slantly in the direction inclined from the Z axis, so that the S pole is formed on the side of the outer diameter side drive coil side  113 CB. Namely, the inner diameter side magnet plate  113 MA and the outer diameter side magnet plate  113 MB are magnetized slantly in the manner that the intersection angle of the magnetization directions of the inner diameter side magnet plate  113 MA and the outer diameter side magnet plate  113 MB are expanded in the width directions of the inner diameter side coil side  113 CA and the outer diameter side coil side  113 CB to form a certain angle. 
         [0105]    Similarly, when viewed from a plane including the X axis and the Z axis, the inner diameter side magnet plate  113 MA in the −X side drive magnet  113 MMX is magnetized slantly in the direction inclined from the Z axis, so that the N pole is formed on the side of the inner diameter side drive coil side  113 CA; and the outer diameter side magnet plate  113 MB is magnetized slantly in the direction inclined from the Z axis, so that the S pole is formed on the side of the outer diameter side drive coil side  113 CB. When viewed from a plane including the X axis and the Z axis, the inner diameter side magnet plate  113 MA in the +Y side drive magnet  113 MPY is magnetized slantly in the direction inclined from the Z axis, so that the N pole is formed on the side of the inner diameter side drive coil side  113 CA; and the outer diameter side magnet plate  113 MB is magnetized slantly in the direction inclined from the Z axis, so that the S pole is formed on the side of the outer diameter side drive coil side  113 CB. When viewed from a plane including the Y axis and the Z axis, the inner diameter side magnet plate  113 MA in the −Y side drive magnet  113 MMY is magnetized slantly in the direction inclined from the Z axis, so that the N pole is formed on the side of the inner diameter side drive coil side  113 CA; and the outer diameter side magnet plate  113 MB is magnetized slantly in the direction inclined from the Z axis, so that the S pole is formed on the side of the outer diameter side drive coil side  113 CB. 
         [0106]    As mentioned above, the electromagnetic drive mechanism  113  for shaking correction includes the following four groups of drive magnets: a +X side electromagnetic drive mechanism  113 PX composed of the +X side drive coil  113 CPX and the +X side drive magnet  113 MPX, a −X side electromagnetic drive mechanism  113 MX composed of the −X side drive coil  113 CMX and the −X side drive magnet  113 MMX, a +Y side electromagnetic drive mechanism  113 PY composed of the +Y side drive coil  113 CPY and the +Y side drive magnet  113 MPY and a −Y side electromagnetic drive mechanism  113 MY composed of the −Y side drive coil  113 CMY and the −Y side drive magnet  113 MMY. 
         [0107]    When the current flows in the focus coils  173 C, the lorentz force in the +Z axis direction is generated by the focus coils  173 C, so that the lens support  123  moves in the Z axis direction so as to focus the shot image in the unshown image sensor. 
         [0108]    And then, when the current flows in the +X side drive coil  113 CPX and the −X side drive coil  113 CMX in the electromagnetic drive mechanism  113  for shaking correction respectively, the inner diameter side magnet plate  113 MA and the outer diameter side magnet plate  113 MB whose magnetization directions form a certain extension angle are magnetized slantly, and thus strong lorentz force in the X axis direction is generated by the +X side drive coil  113 CPX and the −X side drive coil  113 CMX respectively, the lens support  123  swings in the X axis direction (straightly swings in the X axis direction in the third embodiment), and the focused image can be efficiently inhibited from being fuzzy in the unshown image sensor due to shaking. 
         [0109]    Similarly, when the current flows in the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY, the inner diameter side magnet plate  113 MA and the outer diameter side magnet plate  113 MB are magnetized slantly that the magnetization directions form a certain extension angle, and thus strong lorentz force in the Y axis direction is generated by the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY, so that the lens support  123  swings in the Y axis direction (straightly swings in the Y axis direction), and the focused image can be efficiently inhibited from shifting in the unshown image sensor due to shaking. 
         [0110]    Moreover, when the current flows in the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY at preset distribution amounts at the same time, strong lorentz force at a suitable ratio is generated by the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY based on the distribution ratio of electrification amounts flowing on the sides of the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY, the lens can straightly swing in the synthesis direction of the X axis and the Y axis, and the focused image can be efficiently inhibited from being fuzzy in the unshown image sensor due to shaking. 
         [0111]    Thus, in the lens driving device  103  in the third embodiment, the electromagnetic drive mechanism  113  for shaking correction can also utilize strong driving force, so that the lens maintained on the lens support  123  efficiently and straightly swings in the X axis direction and the Y axis direction respectively. 
         [0112]      FIG. 5A  is a main local space diagram of the electromagnetic drive mechanism  174  for focus and the electromagnetic drive mechanism  114  for shaking correction of the lens driving device  103  in the fourth embodiment of the present invention. Moreover,  FIG. 5B  is a magnetic figure illustrating a magnetic field generated by dual-purpose drive magnets  114 M, and  FIG. 5C  is a diagram illustrating the magnetic induction intensity of the shaking correction coils  113  as shown in  FIG. 4B . Moreover, only the part different from the lens driving device  103  in the third embodiment is illustrated in  FIG. 5A , thus also refers to  FIG. 4A  and  FIG. 4B  in the following specification. Moreover, in  FIG. 5C , the +X side dual-purpose drive magnet  114 MPX is partially illustrated through cutting so as to improve the visibility of the oppositely arranged +X side drive coil  113 CPX along the Z axis direction. 
         [0113]    The lens driving device  103  in the fourth embodiment has the functions of auto focus and shaking correction, so that the unshown lens efficiently moves towards the Z axis direction so as to focus the shot image in the unshown image sensor, and the lens efficiently swings in the X axis direction and the Y axis direction respectively (straightly swings in the X axis direction and Y axis direction in the fourth embodiment) so as to inhibit the shot image in the image sensor from shifting. 
         [0114]    As shown in  FIG. 5A , the lens driving device  103  in the embodiment omits the shaking correction magnet  113 M in the third embodiment, and the dual-purpose drive magnets  114 M for focus and shaking correction are used, which is different from the third embodiment. 
         [0115]    The lens driving device  103  in the fourth embodiment of the present invention is integrally formed in the shape of a cuboid. The lens driving device  103  in the fourth embodiment includes: the lens support  123  for mounting the lens; the platelike spring components  143  for supporting the lens support  123  in the suspended manner to be capable of moving in the Z axis direction; the electromagnetic drive mechanism  174  for focus composed of the focus coils  173 C and the dual-purpose drive magnets  114 M for focus and shaking correction; the electromagnetic drive mechanism  114  for shaking correction composed of the shaking correction coils  113 C and the dual-purpose drive magnets  114 M; the square frame-shaped magnet support  133  for supporting the dual-purpose drive magnets  114 M; the base substrate  193  for mounting the shaking correction coils  113 C; and the linear spring components  183  for connecting the platelike spring component  143  with the base substrate  193  and supporting the lens support  123  in the suspended manner to be capable of moving in the X axis direction and the Y axis direction respectively. 
         [0116]    The focus coils  173 C are wound around the axis parallel to the Z axis, and is mounted on the outer diameter part of the lens support  123  formed in the shape of a barrel. The dual-purpose drive magnets  114 M are mounted in the +X side square frame, the −X side square frame, the +Y side square frame and the −Y side square frame of the magnet support  133  respectively. And then, as shown in  FIG. 5A , the dual-purpose drive magnet  114 M is composed of a +X side dual-purpose drive magnet  114 MPX, a −X side dual-purpose drive magnet  114 MMX, a +Y side dual-purpose drive magnet  114 MPY and a −Y side dual-purpose drive magnet  114 MMY. 
         [0117]    The +X side dual-purpose drive magnet  114 MPX, the −X side dual-purpose drive magnet  114 MMX, the +Y side dual-purpose drive magnet  114 MPY and the −Y side dual-purpose drive magnet  114 MMY are formed in the shapes of square plates respectively, and each is formed by attaching two plate surfaces of the magnet plate  114 MA as the forward path side magnet plate on the inner diameter side and the magnet plate  114 MB as the return path side magnet plate on the outer diameter side. 
         [0118]    The focus coils  173 C and the +X side dual-purpose drive magnet  114 MPX, the −X side dual-purpose drive magnet  114 MMX, the +Y side dual-purpose drive magnet  114 MPY and the −Y side dual-purpose drive magnet  114 MMY are isolated at intervals along the radial winding direction and are arranged opposite to each other. The base substrate  193  is a square platelike component with a circular opening in the Z axis direction in the central part. 
         [0119]    The shaking correction coils  113 C are mounted to the +Z side face of the base substrate  193 . The shaking correction coils  113 C include: the +X side drive coil  113 CPX wound around the axis parallel to the Z axis and mounted on the +X side of the base substrate  193 ; the −X side drive coil  113 CMX wound around the axis parallel to the Z axis and mounted on the −X side of the base substrate  193 ; the +Y side drive coil  113 CPY wound around the axis parallel to the Z axis and mounted on the +Y side of the base substrate  193 ; and the −Y side drive coil  113 CMY wound around the axis parallel to the Z axis and mounted on the −Y side of the base substrate  193 ; and these drive coil components for shaking correction are respectively wound in the shapes of long circles. 
         [0120]    When viewed from a plane including the X axis and the Z axis, the inner diameter side magnet plate  114 MA in the +X side dual-purpose drive magnet  114 MPX is magnetized slantly in the direction inclined from the X axis, so that the N pole is formed on the side of the focus coil  173 C, the focus coil  173 C is isolated at an interval along the X axis direction with the inner diameter side magnet plate  114 MA and they are arranged opposite to each other. The side face on the −Z side of the inner diameter side magnet plate  114 MA and the inner diameter side coil side  113 CA of the +X side drive coil  113 CPX are isolated at an interval along the Z axis direction and are arranged opposite to each other. When viewed from a plane including the X axis and the Z axis, the outer diameter side magnet plate  114 MB is magnetized slantly in the direction inclined from the X axis, so that the N pole is formed on the side of the focus coil  173 C, and the side face on the −Z side of the outer diameter side magnet plate  114 MB and the outer diameter side coil side  113 CB of the +X side drive coil  113 CPX are isolated at an interval along the Z axis direction and are arranged opposite to each other. Namely, when the side faces on the −Z side of the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB are observed, the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB are magnetized slantly in the manner that the magnetization directions of the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB form a certain extension angle in the winding width directions of the inner side coil side  113 CA and the outer diameter side coil side  113 CB of the shaking correction coils  113 C, and the side face on the −Z side of the inner diameter side magnet plate  114 MA and the side face on the −Z side of the outer diameter side magnet plate  114 MB are magnetized along mutually different directions. 
         [0121]    Similarly, when viewed from a plane including the X axis and the Z axis, the inner diameter side magnet plate  114 MA in the +X side dual-purpose drive magnet  114 MPX is magnetized slantly in the direction inclined from the X axis, so that the N pole is formed on the side of the focus coil  173 C, the focus coil  173 C is isolated at an interval along the X axis direction with the inner diameter side magnet plate  114 MA and they are arranged opposite to each other. The side face on the −Z side of the inner diameter side magnet plate  114 MA and the inner diameter side coil side  113 CA of the −X side drive coil  113 CMX are isolated at an interval along the Z axis direction and are arranged opposite to each other. When viewed from a plane including the X axis and the Z axis, the outer diameter side magnet plate  114 MB is magnetized slantly in the direction inclined from the X axis, so that the N pole is formed on the side of the focus coil  173 C, the focus coil  173 C and the outer diameter side magnet plate  114 MB are isolated at an interval along the X axis direction and are arranged opposite to each other, and the side face on the −Z side of the outer diameter side magnet plate  114 MB and the outer diameter side coil side  113 CB of the −X side drive coil  113 CPX are isolated at an interval along the Z axis direction and are arranged opposite to each other. 
         [0122]    The inner diameter side magnet plate  114 MA in the +Y side dual-purpose drive magnet  114 MPY is parallel to the plane including the Z axis and the X axis and is magnetized slantly in the direction inclined from the Y axis, so that the N pole is formed on the side of the focus coil  173 C, the focus coil  173 C and the inner diameter side magnet plate  114 MA are isolated at an interval along the Y axis direction and are arranged opposite to each other, and the side face on the −Z side of the inner diameter side magnet plate  114 MA and the inner diameter side coil side  113 CA of the +Y side drive coil  113 CPY are isolated at an interval along the Z axis direction and are arranged opposite to each other. The outer diameter side magnet plate  114 MB is parallel to the plane including the Z axis and the Y axis and is magnetized slantly in the direction inclined from the Y axis, so that the N pole is formed on the side of the focus coil  173 C, the focus coil  173 C and the outer diameter side magnet plate  114 MB are isolated at an interval along the Y axis direction and are arranged opposite to each other, and the side face on the −Z side of the outer diameter side magnet plate  114 MB and the outer diameter side coil side  113 CB of the +Y side drive coil  113 CPY are isolated at an interval along the Z axis direction and are arranged opposite to each other. 
         [0123]    The inner diameter side magnet plate  114 MA in the −Y side dual-purpose drive magnet  114 MPY is parallel to the plane including the Z axis and the Y axis and is magnetized slantly in the direction inclined from the Y axis, so that the N pole is formed on the side of the focus coil  173 C, the focus coil  173 C and the inner diameter side magnet plate  114 MA are isolated at an interval along the Y axis direction and are arranged opposite to each other, and the side face on the −Z side of the inner diameter side magnet plate  114 MA and the inner diameter side coil side  113 CA of the −Y side drive coil  113 CMY are isolated at an interval along the Z axis direction and are arranged opposite to each other. The outer diameter side magnet plate  114 MB is parallel to the plane including the Z axis and the Y axis and is magnetized slantly in the direction inclined from the Y axis, so that the N pole is formed on the side of the focus coil  173 C, the focus coil  173 C and the outer diameter side magnet plate  114 MB are isolated at an interval along the Y axis direction and are arranged opposite to each other, and the side face on the −Z side of the outer diameter side magnet plate  114 MB and the outer diameter side coil side  113 CB of the −Y side drive coil  113 CMY are isolated at an interval along the Z axis direction and are arranged opposite to each other. 
         [0124]    In this way, the shaking correction coils  113 C are composed of the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY. The inner diameter side coil side  113 CA as one long side of these drive coils is formed into the forward path side, and is arranged opposite to the side face of the −Z side of the inner diameter side magnet plate  114 MA; and the outer diameter side coil side  113 CB as the other long side is formed into the return path side, and is arranged opposite to the side face of the −Z side of the outer diameter side magnet plate  114 MB. 
         [0125]    Each platelike spring component  143  includes the +Z side platelike spring component  143 F and the −Z side platelike spring component  143 B. Both of the +Z side platelike spring component  143 F and the −Z side platelike spring component  143 B include an inner diameter part  143   a , an outer diameter part  143   b , four wrist parts  143   c  extending along the peripheral direction and connecting the inner diameter part  143   a  and the outer diameter part  143   b . The inner diameter part  143   a  of the +Z side platelike spring component  143 F is connected with the +Z side end part of the lens support  123 , and the outer diameter part  143   b  of the +Z side platelike spring component  143 F is connected with the +Z side end part of the magnet support  133 . The inner diameter part  143   a  of the −Z side platelike spring component  143 B is connected with the −Z side end part of the lens support  123 , and the outer diameter part  143   b  of the −Z side platelike spring component  143 B is connected with the −Z side end part of the magnet support  133 . The spring component  143  is used for supporting the lens support  123  to be capable of moving in the Z axis direction in the suspended manner. 
         [0126]    The linear spring components  183  are linear components extending along the Z axis direction so as to connect the four corners of the +Z side platelike spring component  143 F of the platelike spring component  143  with the four corners of the base substrate  193 , and the lens support  123  is supported to be capable of moving in the X axis direction and the Y axis direction respectively in the suspended manner. 
         [0127]    As mentioned above, the electromagnetic drive mechanism  114  for shaking correction includes the following four groups of electromagnetic drive mechanisms: the +X side electromagnetic drive mechanism  114 PX for shaking correction composed of the +X side drive coil  113 CPX and the +X side dual-purpose drive magnet  114 MPX, the −X side electromagnetic drive mechanism  114 MX composed of the −X side drive coil  113 CMX and the −X side dual-purpose drive magnet  114 MMX, the +Y side electromagnetic drive mechanism  114 PY for shaking correction composed of the +Y side drive coil  113 CPY and the +Y side dual-purpose drive magnet  114 MPY, and the −Y side electromagnetic drive mechanism  114 MY for shaking correction composed of the −Y side drive coil  113 CMY and the −Y side dual-purpose drive magnet  114 MMY. 
         [0128]      FIG. 5B  illustrates a magnetic figure when the extension angle theta (θ) formed by the magnetization directions of the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB of the +X side dual-purpose drive magnet  114 MPX is 140 degrees. Moreover,  FIG. 5C  illustrates the Z axis direction components in the area (between the points S and T in  FIG. 5B ) that the magnetic induction intensity is respectively crossed with the inner diameter side coil side  113 CA and the outer diameter side coil side  113 CB of the +X side drive coil  113 CPX. The dotted line (MD-180) in  FIG. 5C  illustrates the magnetic induction intensity when the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB are magnetized together along the same direction, namely, illustrates the magnetic induction intensity when the respective magnetization directions of the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB do not form the extension angle. Moreover, the solid line (MD-140) illustrates the magnetic induction intensity when the extension angle theta formed by the magnetization directions of the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB of the +X side dual-purpose drive magnet  114 MPX is 140 degrees during magnetization. 
         [0129]    According to the figure, it is clear and definite that the magnetic induction intensity crossed with the inner diameter side coil side  113 CA and the outer diameter side coil side  113 CB is increased by enabling the magnetization directions of the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB to be expanded in the direction of the oppositely arranged +X side drive coil  113 CPX (the inner diameter side coil side  113 CA and the outer diameter side coil side  113 CB), and the lorentz force generated by the current flowing in the inner diameter side coil side  113 CA and the outer diameter side coil side  113 CB is improved, so that the driving efficiency of the +X side electromagnetic drive mechanism  114 PX for shaking correction can be improved. Moreover, it is the same with the −X side electromagnetic drive mechanism  114 MX, the +Y side electromagnetic drive mechanism  114 PY and the −Y side electromagnetic drive mechanism  114 MY. 
         [0130]    When the current flows in the focus coil  173 C, the lorentz force in the +Z axis direction is generated by the focus coil  173 C, so that the lens support  123  moves towards the Z axis direction so as to focus the shot image in the unshown image sensor. 
         [0131]    And then, in the +X side electromagnetic drive mechanism  114 PX and the −X side electromagnetic drive mechanism  114 MX, the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB whose magnetization directions form a certain extension angle are magnetized slantly, and thus strong lorentz force in the X axis direction is generated by the +X side drive coil  113 CPX and the −X side drive coil  113 CMX by enabling the current to flow in the +X side drive coil  113 CPX and the −X side drive coil  113 CMX in the electromagnetic drive mechanism  114  for shaking correction, so that the lens support  123  swings in the X axis direction (straightly swings in the X axis direction in the fourth embodiment), and the focused image can be efficiently inhibited from shifting in the unshown image sensor due to shaking. 
         [0132]    Similarly, in the +Y side electromagnetic drive mechanism  114 PY for shaking correction and the −Y side electromagnetic drive mechanism  114 MY for shaking correction, the inner diameter side magnet plate  114 MA and the outer diameter side magnet plate  114 MB whose magnetization directions form a certain extension angle are magnetized slantly, and thus strong lorentz force in the Y axis direction is generated by the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY by enabling the current to flow in the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY, so that the lens support  123  swings in the Y axis direction (straightly swings in the Y axis direction), and the focused image can be efficiently inhibited from being fuzzy in the unshown image sensor due to shaking. 
         [0133]    Moreover, the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY are electrified at preset distribution amounts respectively, strong lorentz force at a suitable ratio is generated by the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY based on the distribution ratio of electrification amounts flowing on the sides of the +X side drive coil  113 CPX, the −X side drive coil  113 CMX, the +Y side drive coil  113 CPY and the −Y side drive coil  113 CMY respectively, the lens can straightly swing in the synthesis direction of the X axis and the Y axis, and the focused image can be efficiently inhibited from being fuzzy in the unshown image sensor due to shaking. 
         [0134]    Thus, in the lens driving device  103  in the fourth embodiment, the electromagnetic drive mechanism  114  for shaking correction can also utilize strong driving force, so that the lens maintained on the lens support  123  efficiently and straightly swings in the X axis direction and the Y axis direction respectively. 
         [0135]    While the invention has been described in terms of several exemplary embodiments, those skilled on the art will recognize that the invention can be practiced with modification within the spirit and scope of the appended claims. In addition, it is noted that, the Applicant&#39;s intent is to encompass equivalents of all claim elements, even if amended later during prosecution.