Patent Publication Number: US-10317699-B2

Title: Lens drive device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The disclosure is based upon and claims the benefit of priority from Japanese Patent Application No. 2016-150258, filed on Jul. 29, 2016, the entire contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a lens drive device. 
     BACKGROUND 
     Conventionally, a lens drive device adopting a smooth impact drive mechanism is known as a kind of a lens drive device used in an imaging apparatus mounted on a mobile phone or the like. 
     The lens drive device adopting the smooth impact drive mechanism is disclosed in Japanese Unexamined Patent Publication No. 2009-42551, for example. The lens drive device disclosed in Japanese Unexamined Patent Publication No. 2009-42551 moves a lens unit in a direction orthogonal to a direction of an optical axis by two actuators using the smooth impact drive mechanism and realizes a shake correction function. In addition, the lens drive device moves the lens unit in the direction of the optical axis by the actuators using the smooth impact drive mechanism and realizes a zoom function (autofocus function). 
     In the lens drive device, a plurality of movable objects are provided with respect to a base member. The lens drive device moves the movable objects to the base member and realizes the shake correction function and the zoom function. In addition, in the lens drive device, the base member and the plurality of movable objects are connected by a plurality of conductive wiring lines. 
     SUMMARY 
     In the lens drive device, when the plurality of movable objects are moved, a variation may occur in the movement of the movable objects, due to the wiring lines connecting the base member and the movable objects. For this reason, in a field of the lens drive device, it is required that the movement variation of the movable objects is suppressed and the movable objects are stably moved, at the time of drive by the actuators. 
     Accordingly, the present disclosure discloses a lens drive device capable of suppressing movement variations of movable objects and moving the movable objects stably. 
     According to an aspect of the present disclosure, a lens drive device for driving a lens, includes: a base member; an X-axis movable object configured to be disposed to overlap the base member in a direction of an optical axis of the lens; an X-axis actuator configured to be provided in the base member, engage with the X-axis movable object, and move the X-axis movable object in an X-axis direction orthogonal to the direction of the optical axis of the lens; a Y-axis movable object configured to be disposed to overlap the X-axis movable object at the side opposite to the side provided with the base member in the direction of the optical axis of the lens; a Y-axis actuator configured to be provided in the X-axis movable object, engage with the Y-axis movable object, and move the Y-axis movable object in a Y-axis direction orthogonal to the direction of the optical axis of the lens and crossing the X-axis direction; a lens carrier configured to be disposed to overlap the Y-axis movable object at the side opposite to the side provided with the X-axis movable object in the direction of the optical axis of the lens and to hold the lens; a carrier actuator configured to be provided in the Y-axis movable object, engage with the lens carrier, and move the lens carrier in the direction of the optical axis of the lens; a position sensor configured to be provided in the Y-axis movable object and detect a position of the lens carrier for the Y-axis movable object; a conductive first suspension wire configured to connect an electric wiring line provided in the Y-axis movable object connected to the carrier actuator or an electric wiring line provided in the Y-axis movable object connected to the position sensor and an electric wiring line provided in the base member; and a conductive second suspension wire configured to connect an electric wiring line provided in the X-axis movable object connected to the Y-axis actuator and the electric wiring line provided in the base member, wherein, in a connection position of the first suspension wire and the electric wiring line provided in the Y-axis movable object and a connection position of the second suspension wire and the electric wiring line provided in the X-axis movable object, height positions along the direction of the optical axis of the lens from the base member are almost the same. 
     The connection position of the first suspension wire and the electric wiring line provided in the Y-axis movable object and the connection position of the second suspension wire and the electric wiring line provided in the X-axis movable object are almost the same height positions. Therefore, the first suspension wire and the second suspension wire have almost the same lengths. As a result, an influence (elastic influence) on the X-axis movable object from the second suspension wire when the X-axis movable object moves and an influence (elastic influence) on the Y-axis movable object from the first suspension wire when the Y-axis movable object moves can be equalized (aligned). As such, the influences on the X-axis movable object and the Y-axis movable object from the suspension wires are equalized. For this reason, even though the first suspension wire and the second suspension wire are provided, the X-axis movable object and the Y-axis movable object can be stably moved by suppressing movement variations of the X-axis movable object and the Y-axis movable object. 
     The lens drive device may further include: an X-axis movable object holding portion configured to be provided at a position facing the X-axis actuator with the optical axis of the lens between the X-axis movable object holding portion and the X-axis actuator in the base member and to hold the X-axis movable object to be movable in the X-axis direction with respect to the base member; and a Y-axis movable object holding portion configured to be provided at a position facing the Y-axis actuator with the optical axis of the lens between the Y-axis movable object holding portion and the Y-axis actuator in the X-axis movable object and to hold the Y-axis movable object to be movable in the Y-axis direction with respect to the X-axis movable object. 
     In this case, in the lens drive device, the X-axis movable object holding portion holds the X-axis movable object to be movable in the X-axis direction. As a result, when the X-axis movable object is moved by the X-axis actuator, the X-axis movable object can be stably moved in the X-axis direction by suppressing looseness. In addition, the X-axis movable object holding portion is provided at the position facing the X-axis actuator with the optical axis of the lens between the X-axis movable object holding portion and the X-axis actuator in the base member, so that the X-axis movable object holding portion can hold the X-axis movable object with the gravity center of the lens between the X-axis movable object holding portion and the X-axis actuator. As a result, the lens drive device can move the X-axis movable object in the X-axis direction more stably by the X-axis actuator and the X-axis movable object holding portion. 
     Likewise, for the Y-axis movable object, the lens drive device includes the Y-axis movable object holding portion. Therefore, when the Y-axis movable object is moved, the Y-axis movable object can be stably moved in the Y-axis direction by suppressing looseness. In addition, the Y-axis movable object holding portion is provided at the position facing the Y-axis actuator with the optical axis of the lens between the Y-axis movable object holding portion and the Y-axis actuator in the X-axis movable object, so that the Y-axis movable object holding portion can hold the Y-axis movable object with the gravity center of the lens between the Y-axis movable object holding portion and the Y-axis actuator. As a result, the lens drive device can move the Y-axis movable object in the Y-axis direction more stably by the Y-axis actuator and the Y-axis movable object holding portion. 
     The X-axis actuator may have an X-axis piezoelectric element expanding and contracting in the X-axis direction and an X-axis drive shaft fixed on one end portion of the X-axis direction in the X-axis piezoelectric element, the X-axis movable object may have an X-axis friction engagement portion frictionally engaging with outer circumference of the X-axis drive shaft, the Y-axis actuator may have a Y-axis piezoelectric element expanding and contracting in the Y-axis direction and a Y-axis drive shaft fixed on one end portion of the Y-axis direction in the Y-axis piezoelectric element, the Y-axis movable object may have a Y-axis friction engagement portion frictionally engaging with outer circumference of the Y-axis drive shaft, the carrier actuator may have a Z-axis piezoelectric element expanding and contracting in the direction of the optical axis of the lens and a Z-axis drive shaft fixed on one end portion of the direction of the optical axis in the Z-axis piezoelectric element, and the lens carrier may have a Z-axis friction engagement portion frictionally engaging with outer circumference of the Z-axis drive shaft. In this case, the X-axis piezoelectric element, the Y-axis piezoelectric element, and the Z-axis piezoelectric element are expanded and contracted, so that the X-axis movable object, the Y-axis movable object, and the lens carrier can be moved in the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively. 
     The X-axis movable object may have a rising portion configured to rise to the side of the Y-axis movable object and in which the electric wiring line connected to the Y-axis actuator is provided on a surface at the side of the Y-axis movable object, the second suspension wire may connect the electric wiring line provided in the rising portion and the electric wiring line provided in the base member, a connection position of the second suspension wire and the electric wiring line provided in the rising portion may be located in the same side with the lens carrier against a surface of the Y-axis movable object at the side of the X-axis movable object, in the direction of the optical axis of the lens, in a connection position of the first suspension wire and the electric wiring line provided in the Y-axis movable object and a connection position of the second suspension wire and the electric wiring line provided in the rising portion, height positions along the direction of the optical axis of the lens from the base member may be almost the same. As such, the rising portion is provided in the X-axis movable object, so that the connection position of the second suspension wire and the electric wiring line provided in the rising portion can be separated from the base member. The connection position of the first suspension wire and the electric wiring line provided in the Y-axis movable object and the connection position of the second suspension wire and the electric wiring line provided in the rising portion are almost the same height positions. For this reason, the individual connection positions can be separated from the base member. As such, the connection positions are separated from the base member, so that the large lengths of the first suspension wire and the second suspension wire can be secured. When the movable objects on the base member move, the influences on the movable objects from the first suspension wire and the second suspension wire can be decreased (the elasticity can be decreased by increasing the lengths). As a result, even though the first suspension wire and the second suspension wire are provided, the movable objects on the base member can be moved more stably. 
     The lens drive device further includes: a conductive third suspension wire configured to connect a first electric wiring line provided in the Y-axis movable object connected to the position sensor and the electric wiring line provided in the base member; and a conductive fourth suspension wire configured to connect a second electric wiring line provided in the Y-axis movable object connected to the position sensor and the electric wiring line provided in the base member, wherein the first suspension wire may connect the electric wiring line connected to the carrier actuator and the electric wiring line provided in the base member, the base member may have an approximately rectangular shape having four corner portions, when viewed from the direction of the optical axis of the lens, and the first suspension wire, the second suspension wire, the third suspension wire, and the fourth suspension wire may be located in the four corner portions in the base member, respectively. As such, the suspension wires are provided in the four corner portions of the base member, respectively. Therefore, when the suspension wires affect the movable objects on the base member, a deviation of the influences can be suppressed. 
     According to an aspect of the present disclosure, movable objects can be moved stably. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded perspective view illustrating a schematic configuration of a lens drive device according to an embodiment; 
         FIG. 2  is a perspective view when a lens drive unit of  FIG. 1  is viewed from the side of an X-axis actuator; 
         FIG. 3  is a lateral view when the lens drive unit of  FIG. 2  is viewed from the side of an X-axis movable object holding portion; 
         FIG. 4  is a perspective view illustrating a configuration of a base member; 
         FIG. 5  is a perspective view illustrating a configuration of an X-axis movable object; 
         FIG. 6  is a perspective view when a state in which the base member and the X-axis movable object are combined is viewed from the side of the X-axis movable object holding portion; 
         FIG. 7  is a perspective view when a state in which the base member and the X-axis movable object are combined is viewed from the side of the X-axis actuator; 
         FIG. 8  is a cross-sectional view taken along the line VIII-VIII of  FIG. 7 ; 
         FIG. 9  is a cross-sectional view taken along the line IX-IX of  FIG. 7 ; 
         FIG. 10  is a plan view when a state in which a base body portion and an X-axis movable object body portion are combined is viewed from the side of an X-axis movable object body portion; 
         FIG. 11  is a perspective view illustrating a configuration of a Y-axis movable object; 
         FIG. 12  is a perspective view when a state in which the base member, the X-axis movable object, and the Y-axis movable object are combined is viewed from the side of the X-axis movable object holding portion; 
         FIG. 13  is a lateral view when a state in which the base member, the X-axis movable object, and the Y-axis movable object are combined is viewed from the side of the Y-axis actuator; 
         FIG. 14  is a lateral view when a state in which the base member, the X-axis movable object, and the Y-axis movable object are combined is viewed from the side of the Y-axis movable object holding portion; 
         FIG. 15  is a plan view illustrating a state in which the base body portion, the X-axis movable object body portion, and the Y-axis movable object are combined; 
         FIG. 16  is a perspective view illustrating a lens carrier; 
         FIG. 17  is a perspective view when a state in which the base member, the X-axis movable object, the Y-axis movable object, and the lens carrier are combined is viewed from the side of the X-axis movable object holding portion; 
         FIG. 18  is a plan view illustrating a state in which the base body portion, the X-axis movable object body portion, the Y-axis movable object, and the lens carrier are combined; 
         FIG. 19  is a plan view when the lens drive unit is viewed from the side of an auxiliary member; 
         FIG. 20  is a cross-sectional view taken along the line XX-XX of  FIG. 19 ; 
         FIG. 21  is a perspective view illustrating a lens carrier according to a modification; and 
         FIG. 22  is a cross-sectional view illustrating a surrounding portion of a carrier convex portion of a lens drive unit according to the modification. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same elements are denoted with the same reference numerals and repeated explanation is omitted. 
     A lens drive device  1  illustrated in  FIGS. 1 and 2  is mounted on an imaging apparatus such as a digital camera, for example, and drives a lens  4 . The lens drive device  1  includes a lens drive unit  2  and a cover  3 . The lens drive device  1  has an optical axis L of the lens  4  to be attached to the lens drive unit  2 . 
     In the individual drawings, an XYZ orthogonal coordinate system is illustrated for the convenience of description. A Z-axis direction becomes a direction of the optical axis L of the lens  4  to be attached. An X-axis direction is orthogonal to the direction of the optical axis L. A Y-axis direction is orthogonal to the direction of the optical axis L and is orthogonal to the X-axis direction. 
     As illustrated in  FIGS. 1 to 3 , the lens drive unit  2  includes a base member  100 , an X-axis movable object  200 , a Y-axis movable object  300 , and a lens carrier  400 . The base member  100 , the X-axis movable object  200 , the Y-axis movable object  300 , and the lens carrier  400  are arranged along the direction of the optical axis L in this order. The lens drive unit  2  further includes an auxiliary member  500  that is disposed to cover a surrounding portion of the lens carrier  400 . 
     Specifically, the X-axis movable object  200  is disposed to overlap the base member  100  in the direction of the optical axis L. The Y-axis movable object  300  is disposed to overlap the X-axis movable object  200  at the side opposite to the side (side which the base member  100  overlaps) provided with the base member  100 , in the direction of the optical axis L. The lens carrier  400  is disposed to overlap the Y-axis movable object  300  at the side opposite to the side (side which the X-axis movable object  200  overlaps) provided with the X-axis movable object  200 , in the direction of the optical axis L. 
     The X-axis movable object  200  is supported by the base member  100  to be movable relatively in the X-axis direction with respect to the base member  100 . The Y-axis movable object  300  is supported by the X-axis movable object  200  to be movable relatively in the Y-axis direction with respect to the X-axis movable object  200 . 
     The lens carrier  400  is supported by the Y-axis movable object  300  to be movable in the direction of the optical axis L. 
     First, a surrounding portion of the base member  100  will be described in detail. As illustrated in  FIG. 4 , the base member  100  includes a base body portion  110 , a first convex portion  111 , and a second convex portion  112 . The base body portion  110  is an approximately rectangular member having four corner portions, when viewed from the direction of the optical axis L. For the convenience of description, four sides configuring an outer circumferential edge of the base body portion  110  when viewed from the direction of the optical axis L are called sides H 11 , H 12 , H 13 , and H 14 . The sides H 11  and H 12  are parallel to each other and extend along the X-axis direction. The sides H 13  and H 14  are parallel to each other and extend along the Y-axis direction. When the base body portion  110  is viewed from the direction of the optical axis L, the individual sides are connected in order of the sides H 11 , H 14 , H 12 , and H 13  and the outer circumferential edge is formed. 
     A circular opening portion  110   a  with the optical axis L as a center is provided in the base body portion  110 . The first convex portion  111  and the second convex portion  112  are provided on a surface of the base body portion  110  at the side of the X-axis movable object  200  (surface of the base body portion  110  at the side which the X-axis movable object  200  overlaps). The first convex portion  111  and the second convex portion  112  are provided in the same side with the side H 12  against the opening portion  110   a , on the surface of the base body portion  110 . The first convex portion  111  and the second convex portion  112  are arranged in the X-axis direction. A predetermined gap is formed in the X-axis direction between the first convex portion  111  and the second convex portion  112 . Grooves that extend along the X-axis direction and have an approximately V shape are provided in top surfaces (top portions) of the first convex portion  111  and the second convex portion  112 , that is, surfaces of the first convex portion  111  and the second convex portion  112  at the side of the X-axis movable object  200 . The base body portion  110  and the first convex portion  111  and the second convex portion  112  are integrally provided. 
     An X-axis movable object holding portion  120  is provided in the same side with the side H 11  against the opening portion  110   a , on the surface of the base body portion  110  at the side of the X-axis movable object  200 . The X-axis movable object holding portion  120  includes a support portion  121  and a shaft portion  122 . The support portion  121  is fixed on the surface of the base body portion  110  at the side of the X-axis movable object  200 . The shaft portion  122  is formed in a columnar shape and is disposed to extend along the X-axis direction. The support portion  121  supports a center portion of the shaft portion  122 . Gaps are provided between both end portions of the shaft portion  122  and the base body portion  110 . The base body portion  110  and the X-axis movable object holding portion  120  are integrally provided. 
     An X-axis actuator  130  is provided in the same side with the side H 12  against the opening portion  110   a , on the surface of the base body portion  110  at the side of the X-axis movable object  200 . The X-axis actuator  130  and the X-axis movable object holding portion  120  face each other with the optical axis L between the X-axis actuator  130  and the X-axis movable object holding portion  120 . 
     The X-axis actuator  130  is an actuator that configures a smooth impact drive mechanism. The X-axis actuator  130  includes a prismatic X-axis piezoelectric element  131 , an X-axis drive shaft  132 , and a weight portion  133 . 
     The X-axis piezoelectric element  131  is an element that can expand and contract in the X-axis direction. The X-axis piezoelectric element  131  is configured using a piezoelectric material. As the piezoelectric material, an inorganic piezoelectric material such as lead zirconate titanate (so-called PZT), crystal, lithium niobate (LiNbO 3 ), potassium tantalate niobate (K(Ta,Nb)O 3 ), barium titanate (BaTiO 3 ), lithium tantalate (LiTaO 3 ), and strontium titanate (SrTiO 3 ) can be used. The X-axis piezoelectric element  131  can have a lamination structure in which a plurality of piezoelectric layers made of the piezoelectric material and a plurality of electrode layers are alternately laminated. The expansion and the contraction of the X-axis piezoelectric element  131  can be controlled by controlling a voltage applied to the X-axis piezoelectric element  131 . 
     The X-axis piezoelectric element  131  is not limited to the prismatic shape and may have a shape in which the X-axis piezoelectric element  131  can expand and contract in the X-axis direction, for example, a columnar shape. 
     The X-axis drive shaft  132  is formed in a columnar shape and is disposed such that an axis line of a columnar shape extends along the X-axis direction. The X-axis drive shaft  132  is configured using a composite resin material including a fiber such as a carbon fiber. 
     One end portion of the X-axis direction in the X-axis drive shaft  132  is fixed on one end portion of the X-axis direction in the X-axis piezoelectric element  131 . The surface of the X-axis drive shaft  132  at the side of the base body portion  110  is supported by the first convex portion  111  and the second convex portion  112  provided in the base body portion  110 . The X-axis drive shaft  132  is not fixed on the first convex portion  111  and the second convex portion  112  and is slidable along the X-axis direction with respect to the first convex portion  111  and the second convex portion  112 . 
     The weight portion  133  is fixed on the other end portion of the X-axis direction in the X-axis piezoelectric element  131 . The weight portion  133  is formed of a material having a high specific gravity such as tungsten and a tungsten alloy and is designed to be heavier than the X-axis drive shaft  132 . By designing the weight portion  133  to be heavier than the X-axis drive shaft  132 , when the X-axis piezoelectric element  131  expands and contracts, the weight portion  133  is hard to be displaced and the X-axis drive shaft  132  can be efficiently displaced. 
     An actuator holding portion  110   b  that rises to the side of the X-axis movable object  200  is provided on the surface of the base body portion  110  at the side of the X-axis movable object  200 . The surface of the weight portion  133  at the side opposite to the side on which the X-axis piezoelectric element  131  is fixed on the actuator holding portion  110   b . As a result, the X-axis actuator  130  is fixed on the actuator holding portion  110   b  while the X-axis drive shaft  132  is supported by the first convex portion  111  and the second convex portion  112 . 
     An adhesive such as an epoxy adhesive can be used for fixation of the X-axis piezoelectric element  131  and the X-axis drive shaft  132 , fixation of the X-axis piezoelectric element  131  and the weight portion  133 , and fixation of the weight portion  133  and the actuator holding portion  110   b.    
     Next, a configuration of the X-axis movable object  200  and a support configuration of the X-axis movable object  200  by the base member  100  will be described in detail. As illustrated in  FIG. 5 , the X-axis movable object  200  includes an X-axis movable object body portion  210 , a first convex portion  211 , a second convex portion  212 , an X-axis friction engagement portion  240 , and an X-axis support portion  250 . 
     The X-axis movable object body portion  210  is an approximately rectangular member having four corner portions, when viewed from the direction of the optical axis L. For the convenience of description, four sides configuring an outer circumferential edge of the X-axis movable object body portion  210  when viewed from the direction of the optical axis L are called sides H 21 , H 22 , H 23 , and H 24  (refer to  FIG. 7 ). A circular opening portion  210   a  with the optical axis L as a center is provided in the X-axis movable object body portion  210 . The opening portion  210   a  provided in the X-axis movable object body portion  210  and the opening portion  110   a  provided in the base body portion  110  have almost the same sizes. 
     As illustrated in  FIGS. 4 to 7 , the side H 21  is a side located at the side of the side H 11  of the base member  100  with respect to the opening portion  210   a , when viewed from the direction of the optical axis L in a state in which the X-axis movable object  200  overlaps the base member  100 . Likewise, the side H 22  is a side located at the side of the side H 12  of the base member  100  with respect to the opening portion  210   a . The side H 23  is a side located at the side of the side H 13  of the base member  100  with respect to the opening portion  210   a . The side H 24  is a side located at the side of the side H 14  of the base member  100  with respect to the opening portion  210   a.    
     The first convex portion  211  and the second convex portion  212  are provided on a surface of the X-axis movable object body portion  210  at the side of the Y-axis movable object  300  (surface of the X-axis movable object body portion  210  at the side which the Y-axis movable object  300  overlaps). The first convex portion  211  and the second convex portion  212  are provided in the same side with the side H 23  against the opening portion  210   a , on the surface of the X-axis movable object body portion  210 . The first convex portion  211  and the second convex portion  212  are arranged in the Y-axis direction. A predetermined gap is formed in the Y-axis direction between the first convex portion  211  and the second convex portion  212 . Grooves that extend along the Y-axis direction and have an approximately V shape are provided in top surfaces (top portions) of the first convex portion  211  and the second convex portion  212 , that is, surfaces of the first convex portion  211  and the second convex portion  212  at the side of the Y-axis movable object  300 . The X-axis movable object body portion  210  and the first convex portion  211  and the second convex portion  212  are integrally provided. 
     A Y-axis movable object holding portion  220  is provided in the same side with the side H 24  against the opening portion  210   a , on the surface of the X-axis movable object body portion  210  at the side of the Y-axis movable object  300 . The Y-axis movable object holding portion  220  includes a support portion  221  and a shaft portion  222 . The support portion  221  is fixed on the surface of the X-axis movable object body portion  210  at the side of the Y-axis movable object  300 . The shaft portion  222  is formed in a columnar shape and is disposed to extend along the Y-axis direction. The support portion  221  supports a center portion of the shaft portion  222 . Gaps are provided between both end portions of the shaft portion  222  and the X-axis movable object body portion  210 . The X-axis movable object body portion  210  and the Y-axis movable object holding portion  220  are integrally provided. 
     The X-axis friction engagement portion  240  is provided in an end portion of the X-axis movable object body portion  210  at the side of the side H 22 . The X-axis friction engagement portion  240  protrudes in a direction separated from the opening portion  210   a  along the Y-axis direction, from the X-axis movable object body portion  210 . A groove that extends along the X-axis direction and has an approximately V shape is provided in a surface of the X-axis friction engagement portion  240  at the side of the Y-axis movable object  300 . Hereinafter, the surface of the X-axis friction engagement portion  240  provided with the groove of the V shape is called a V-shaped surface  240   a.    
     The X-axis support portion  250  is provided in an end portion of the X-axis movable object body portion  210  at the side of the side H 21 . The X-axis support portion  250  includes a first X-axis support portion  251  and a second X-axis support portion  252 . The first X-axis support portion  251  is located in the same side with the side H 23  against the second X-axis support portion  252 . 
     The first X-axis support portion  251  includes a pair of plate portions  251   a  and  251   b  and a raised portion  251   c . The pair of plate portions  251   a  and  251   b  extends from the end portion of the X-axis movable object body portion  210  at the side of the side H 21  to the side separated from the opening portion  210   a  along the Y-axis direction. A predetermined gap capable of inserting the end portion of the shaft portion  122  of the X-axis movable object holding portion  120  is provided in the direction of the optical axis L between the plate portions  251   a  and  251   b . The plate portion  251   a  is located in the same side with the base member  100  against the plate portion  251   b . The raised portion  251   c  is provided on a surface of the plate portion  251   a  at the side of the plate portion  251   b . In the raised portion  251   c , a top portion extends along the Y-axis direction. The raised portion  251   c  protrudes from the plate portion  251   a , such that a cross section in the X-axis direction has an approximately circular arc shape. 
     The second X-axis support portion  252  includes a pair of plate portions  252   a  and  252   b  and a raised portion  252   c . The pair of plate portions  252   a  and  252   b  extends from the end portion of the X-axis movable object body portion  210  at the side of the side H 21  to the side separated from the opening portion  210   a  along the Y-axis direction. A predetermined gap capable of inserting the end portion of the shaft portion  122  of the X-axis movable object holding portion  120  is provided in the direction of the optical axis L between the plate portions  252   a  and  252   b . The plate portion  252   a  is located in the same side with the base member  100  against the plate portion  252   b . The raised portion  252   c  is provided on a surface of the plate portion  252   a  at the side of the plate portion  252   b . In the raised portion  252   c , a top portion extends along the Y-axis direction. The raised portion  252   c  protrudes from the plate portion  252   a , such that a cross section in the X-axis direction has an approximately circular arc shape. 
     Next, a state in which the X-axis movable object  200  overlaps the base member  100  will be described. As illustrated in  FIGS. 6 to 9 , in a state in which the X-axis movable object  200  overlaps the base member  100 , both end portions of the shaft portion  122  of the X-axis movable object holding portion  120  are fitted between the plate portions  251   a  and  251   b  of the X-axis support portion  250  and between the plate portions  252   a  and  252   b  of the X-axis support portion  250 , respectively. 
     In addition, the X-axis movable object body portion  210  is provided with a pressing member  253  of which one end portion is fixed on the X-axis movable object body portion  210  and the other end portion comes into contact with the shaft portion  122  of the X-axis movable object holding portion  120 . The pressing member  253  has elasticity. The other end portion of the pressing member  253  comes into contact with the shaft portion  122 , so that the pressing member  253  lifts the X-axis movable object body portion  210  in a direction separated from the base body portion  110 . 
     As a result, an outer circumferential surface of the shaft portion  122  of the X-axis movable object holding portion  120  and the raised portion  251   c  of the first X-axis support portion  251  and the raised portion  252   c  of the second X-axis support portion  252  come into contact with each other. In addition, the outer circumferential surface of the shaft portion  122  and the raised portions  251   c  and  252   c  come into point contact with each other. The raised portion  251   c  of the first X-axis support portion  251  and the raised portion  252   c  of the second X-axis support portion  252  come into contact with the outer circumferential surface of the shaft portion  122  of the X-axis movable object holding portion  120  to be movable in at least the X-axis direction. 
     In a state in which the X-axis movable object  200  overlaps the base member  100 , the X-axis friction engagement portion  240  is located between the first convex portion  111  and the second convex portion  112  provided in the base body portion  110 . In addition, the X-axis friction engagement portion  240  is located between the X-axis drive shaft  132  of the X-axis actuator  130  and the base body portion  110 . 
     In addition, the X-axis movable object body portion  210  is provided with a pressing member  241  of which one end portion is fixed on the X-axis movable object body portion  210  and the other end portion comes into contact with the X-axis drive shaft  132  of the X-axis actuator  130 . The pressing member  241  has elasticity. The other end portion of the pressing member  241  comes into contact with the X-axis drive shaft  132 , so that the pressing member  241  lifts the X-axis movable object body portion  210  in a direction separated from the base body portion  110 . 
     As a result, the V-shaped surface  240   a  of the X-axis friction engagement portion  240  frictionally engages with an outer circumferential surface of the X-axis drive shaft  132  of the X-axis actuator  130 . In addition, the outer circumferential surface of the X-axis drive shaft  132  and the V-shaped surface  240   a  come into line contact with each other in two lines. Specifically, one surface configuring a V shape in the V-shaped surface  240   a  and the outer circumferential surface of the X-axis drive shaft  132  come into line contact with each other and the other surface configuring the V shape in the V-shaped surface  240   a  and the outer circumferential surface of the X-axis drive shaft  132  come into line contact with each other. 
     In a state in which the X-axis friction engagement portion  240  frictionally engages with the X-axis drive shaft  132  of the X-axis actuator  130 , the X-axis piezoelectric element  131  expands and contracts in the X-axis direction, so that the X-axis movable object  200  is moved in the X-axis direction. 
     As illustrated in  FIG. 10 , a length of the X-axis direction in the X-axis friction engagement portion  240  is shorter than a length of the predetermined gap between the first convex portion  111  and the second convex portion  112  provided in the base body portion  110 . That is, a movement of the X-axis direction in the X-axis friction engagement portion  240  is regulated by the first convex portion  111  and the second convex portion  112 . As such, the first convex portion  111  and the second convex portion  112  provided in the base body portion  110  function as an X-axis stopper mechanism for regulating a movement range of the X-axis direction in the X-axis movable object  200 . 
     The X-axis movable object  200  is held to be movable in the X-axis direction, in three places of the X-axis friction engagement portion  240 , the first X-axis support portion  251 , and the second X-axis support portion  252 , with respect to the base member  100 . In addition, the pressing members  241  and  253  lift the X-axis movable object body portion  210 , so that the X-axis movable object body portion  210  floats from the base body portion  110 . 
     As illustrated in  FIGS. 6 and 7 , a Y-axis actuator  230  is provided in the same side with the side H 23  against the opening portion  210   a , on the surface of the X-axis movable object body portion  210  at the side of the Y-axis movable object  300 . The Y-axis actuator  230  and the Y-axis movable object holding portion  220  face each other with the optical axis L between the Y-axis actuator  230  and the Y-axis movable object holding portion  220 . 
     The Y-axis actuator  230  is an actuator that configures a smooth impact drive mechanism. The Y-axis actuator  230  includes a prismatic Y-axis piezoelectric element  231 , a Y-axis drive shaft  232 , and a weight portion  233 . The Y-axis piezoelectric element  231  is an element that can expand and contract in the Y-axis direction. The Y-axis piezoelectric element  231  has the same configuration as the configuration of the X-axis piezoelectric element  131  of the X-axis actuator  130 . The expansion and the contraction of the Y-axis piezoelectric element  231  can be controlled by controlling a voltage applied to the Y-axis piezoelectric element  231 . 
     The Y-axis drive shaft  232  is formed in a columnar shape and is disposed such that an axis line of a columnar shape extends along the Y-axis direction. The Y-axis drive shaft  232  is configured using a composite resin material including a fiber such as a carbon fiber, similar to the X-axis drive shaft  132 . 
     One end portion of the Y-axis direction in the Y-axis drive shaft  232  is fixed on one end portion of the Y-axis direction in the Y-axis piezoelectric element  231 . The surface of the Y-axis drive shaft  232  at the side of the X-axis movable object body portion  210  is supported by the first convex portion  211  and the second convex portion  212  provided in the X-axis movable object body portion  210 . The Y-axis drive shaft  232  is not fixed on the first convex portion  211  and the second convex portion  212  and is slidable along the Y-axis direction with respect to the first convex portion  211  and the second convex portion  212 . 
     The weight portion  233  is fixed on the other end portion of the Y-axis direction in the Y-axis piezoelectric element  231 . The weight portion  233  is designed to be heavier than the Y-axis drive shaft  232 , similar to the weight portion  133 . 
     A rising portion  260  is provided on the surface of the X-axis movable object body portion  210  at the side of the Y-axis movable object  300 . The rising portion  260  rises from the corner portion of the X-axis movable object body portion  210  in which the sides H 21  and H 23  are connected and projects from a position of an upper end portion of the rising portion to the outside (side separated from the opening portion  210   a ). In addition, a portion projecting to the outside in the rising portion  260  is called a projection portion  260   a . The surface of the weight portion  233  at the side opposite to the side on which the Y-axis piezoelectric element  231  is fixed is fixed on a surface of the rising portion  260  at the side of the first convex portion  211 . As a result, the Y-axis actuator  230  is fixed on the rising portion  260  while the Y-axis drive shaft  232  is supported by the first convex portion  211  and the second convex portion  212 . 
     An adhesive such as an epoxy adhesive can be used for fixation of the Y-axis piezoelectric element  231  and the Y-axis drive shaft  232 , fixation of the Y-axis piezoelectric element  231  and the weight portion  233 , and fixation of the weight portion  233  and the rising portion  260 . 
     Next, a configuration of the Y-axis movable object  300  and a support configuration of the Y-axis movable object  300  by the X-axis movable object  200  will be described in detail. As illustrated in  FIG. 11 , the Y-axis movable object  300  includes a Y-axis movable object body portion  310 , a first sidewall portion  311   a , a second sidewall portion  311   b , a third sidewall portion  311   c , a fourth sidewall portion  311   d , a Y-axis friction engagement portion  340 , and a Y-axis support portion  350 . 
     The Y-axis movable object body portion  310  is an approximately rectangular member having four corner portions, when viewed from the direction of the optical axis L. For the convenience of description, four sides configuring an outer circumferential edge of the Y-axis movable object body portion  310  when viewed from the direction of the optical axis L are called sides H 31 , H 32 , H 33 , and H 34 . A circular opening portion  310   a  with the optical axis L as a center is provided in the Y-axis movable object body portion  310 . The opening portion  310   a  provided in the Y-axis movable object body portion  310  and the opening portion  210   a  provided in the X-axis movable object body portion  210  have almost the same sizes. 
     As illustrated in  FIGS. 11 and 15 , the side H 31  is a side located at the side of the side H 21  of the X-axis movable object  200  with respect to the opening portion  310   a , when viewed from the direction of the optical axis L in a state in which the Y-axis movable object  300  overlaps the X-axis movable object  200 . Likewise, the side H 32  is a side located at the side of the side H 22  of the X-axis movable object  200  with respect to the opening portion  310   a . The side H 33  is a side located at the side of the side H 23  of the X-axis movable object  200  with respect to the opening portion  310   a . The side H 34  is a side located at the side of the side H 24  of the X-axis movable object  200  with respect to the opening portion  310   a.    
     As illustrated in  FIG. 11 , the first sidewall portion  311   a  rises from the Y-axis movable object body portion  310  to the side of the lens carrier  400 , in the corner portion of the Y-axis movable object body portion  310  in which the sides H 31  and H 34  are connected. In the first sidewall portion  311   a , a notch portion  312  extending along the direction of the optical axis L is provided at a position corresponding to a locking convex portion  420  of the lens carrier  400 . The second sidewall portion  311   b  rises from the Y-axis movable object body portion  310  to the side of the lens carrier  400 , in the corner portion of the Y-axis movable object body portion  310  in which the sides H 34  and H 32  are connected. In addition, the first sidewall portion  311   a  and the second sidewall portion  311   b  extend along the side H 34  of the Y-axis movable object body portion  310  and are connected to each other. 
     The third sidewall portion  311   c  rises from the Y-axis movable object body portion  310  to the side of the lens carrier  400 , in the corner portion of the Y-axis movable object body portion  310  in which the sides H 32  and H 33  are connected. The fourth sidewall portion  311   d  rises from the Y-axis movable object body portion  310  to the side of the lens carrier  400 , in the corner portion of the Y-axis movable object body portion  310  in which the sides H 33  and H 31  are connected. 
     An actuator holding portion  310   b  that is recessed in a circular shape is provided on the surface of the Y-axis movable object body portion  310  at the side of the lens carrier  400 . The actuator holding portion  310   b  is located in a region between the third sidewall portion  311   c  and the opening portion  310   a.    
     As illustrated in  FIG. 11 , the Y-axis friction engagement portion  340  is provided in an end portion of the Y-axis movable object body portion  310  at the side of the side H 33 . The Y-axis friction engagement portion  340  protrudes in a direction separated from the opening portion  310   a  along the X-axis direction, from the Y-axis movable object body portion  310 . A groove that extends along the Y-axis direction and has an approximately V shape is provided on a surface of the Y-axis friction engagement portion  340  at the side of the lens carrier  400 . Hereinafter, the surface of the Y-axis friction engagement portion  340  provided with the groove of the V shape is called a V-shaped surface  340   a.    
     As illustrated in  FIG. 11 , the Y-axis support portion  350  is provided in an end portion of the Y-axis movable object body portion  310  at the side of the side H 34 . The Y-axis support portion  350  includes a first Y-axis support portion  351  and a second Y-axis support portion  352 . The first Y-axis support portion  351  is located in the same side with the side H 31  against the second Y-axis support portion  352 . 
     The first Y-axis support portion  351  includes a pair of plate portions  351   a  and  351   b  and a raised portion  351   c  (refer to  FIGS. 11 and 14 ). The pair of plate portions  351   a  and  351   b  extends from the end portion of the Y-axis movable object body portion  310  at the side of the side H 34  to the side separated from the opening portion  310   a  along the X-axis direction. A predetermined gap capable of inserting the end portion of the shaft portion  222  of the Y-axis movable object holding portion  220  is provided in the direction of the optical axis L between the plate portions  351   a  and  351   b . The plate portion  351   a  is located in the same side with the X-axis movable object  200  against the plate portion  351   b . The raised portion  351   c  is provided on a surface of the plate portion  351   a  at the side of the plate portion  351   b . In the raised portion  351   c , a top portion extends along the X-axis direction. The raised portion  351   c  protrudes from the plate portion  351   a , such that a cross section in the Y-axis direction has an approximately circular arc shape. 
     The second Y-axis support portion  352  includes a pair of plate portions  352   a  and  352   b  and a raised portion  352   c  (refer to  FIGS. 11 and 14 ). The pair of plate portions  352   a  and  352   b  extends from the end portion of the Y-axis movable object body portion  310  at the side of the side H 34  to the side separated from the opening portion  310   a  along the X-axis direction. A predetermined gap capable of inserting the end portion of the shaft portion  222  of the Y-axis movable object holding portion  220  is provided in the direction of the optical axis L between the plate portions  352   a  and  352   b . The plate portion  352   a  is located in the same side with the X-axis movable object  200  against the plate portion  352   b . The raised portion  352   c  is provided on a surface of the plate portion  352   a  at the side of the plate portion  352   b . In the raised portion  352   c , a top portion extends along the X-axis direction. The raised portion  352   c  protrudes from the plate portion  352   a , such that a cross section in the Y-axis direction has an approximately circular arc shape. 
     The Y-axis movable object  300  further includes a first wiring line connection portion  321 , a second wiring line connection portion  322 , and a third wiring line connection portion  323 . The first wiring line connection portion  321  projects from a position near a tip portion of a rising direction of the first sidewall portion  311   a  to the outside (side separated from the opening portion  310   a ). The second wiring line connection portion  322  projects from a position near a tip portion of a rising direction of the second sidewall portion  311   b  to the outside (side separated from the opening portion  310   a ). The third wiring line connection portion  323  projects from a position near a tip portion of a rising direction of the third sidewall portion  311   c  to the outside (side separated from the opening portion  310   a ). 
     Next, a state in which the Y-axis movable object  300  overlaps the X-axis movable object  200  will be described. As illustrated in  FIGS. 12 to 14 , in a state in which the Y-axis movable object  300  overlaps the X-axis movable object  200 , both end portions of the shaft portion  222  of the Y-axis movable object holding portion  220  are fitted between the plate portions  351   a  and  351   b  of the Y-axis support portion  350  and between the plate portions  352   a  and  352   b  of the Y-axis support portion  350 , respectively. 
     In addition, the Y-axis movable object body portion  310  is provided with a pressing member  353  of which one end portion is fixed on the Y-axis movable object body portion  310  and the other end portion comes into contact with the shaft portion  222  of the Y-axis movable object holding portion  220 . The pressing member  353  has elasticity. The other end portion of the pressing member  353  comes into contact with the shaft portion  222 , so that the pressing member  353  lifts the Y-axis movable object body portion  310  in a direction separated from the X-axis movable object body portion  210 . 
     As a result, an outer circumferential surface of the shaft portion  222  of the Y-axis movable object holding portion  220  and the raised portion  351   c  of the first Y-axis support portion  351  and the raised portion  352   c  of the second Y-axis support portion  352  come into contact with each other. In addition, the outer circumferential surface of the shaft portion  222  and the raised portions  351   c  and  352   c  come into point contact with each other. The raised portion  351   c  of the first Y-axis support portion  351  and the raised portion  352   c  of the second Y-axis support portion  352  come into contact with the outer circumferential surface of the shaft portion  222  of the Y-axis movable object holding portion  220  to be movable in at least the Y-axis direction. 
     In a state in which the Y-axis movable object  300  overlaps the X-axis movable object  200 , the Y-axis friction engagement portion  340  is located between the first convex portion  211  and the second convex portion  212  provided in the X-axis movable object body portion  210 . In addition, the Y-axis friction engagement portion  340  is located between the Y-axis drive shaft  232  of the Y-axis actuator  230  and the X-axis movable object body portion  210 . 
     In addition, the Y-axis movable object body portion  310  is provided with a pressing member  341  of which one end portion is fixed on the third sidewall portion  311   c  rising from the Y-axis movable object body portion  310  and the other end portion comes into contact with the 
     Y-axis drive shaft  232  of the Y-axis actuator  230 . The pressing member  341  has elasticity. The other end portion of the pressing member  341  comes into contact with the Y-axis drive shaft  232 , so that the pressing member  341  lifts the Y-axis movable object body portion  310  in a direction separated from the X-axis movable object body portion  210 . 
     As a result, the V-shaped surface  340   a  of the Y-axis friction engagement portion  340  frictionally engages with an outer circumferential surface of the Y-axis drive shaft  232  of the Y-axis actuator  230 . In addition, the outer circumferential surface of the 
     Y-axis drive shaft  232  and the V-shaped surface  340   a  come into line contact with each other in two lines. Specifically, one surface configuring a V shape in the V-shaped surface  340   a  and the outer circumferential surface of the Y-axis drive shaft  232  come into line contact with each other and the other surface configuring the V shape in the V-shaped surface  340   a  and the outer circumferential surface of the Y-axis drive shaft  232  come into line contact with each other. 
     In a state in which the Y-axis friction engagement portion  340  frictionally engages with the Y-axis drive shaft  232  of the Y-axis actuator  230 , the Y-axis piezoelectric element  231  expands and contracts in the Y-axis direction, so that the Y-axis movable object  300  is moved in the Y-axis direction. 
     As illustrated in  FIG. 15 , a length of the Y-axis direction in the Y-axis friction engagement portion  340  is shorter than a length of the predetermined gap between the first convex portion  211  and the second convex portion  212  provided in the X-axis movable object body portion  210 . That is, a movement of the Y-axis direction in the Y-axis friction engagement portion  340  is regulated by the first convex portion  211  and the second convex portion  212 . As such, the first convex portion  211  and the second convex portion  212  provided in the X-axis movable object body portion  210  function as a Y-axis stopper mechanism for regulating a movement range of the Y-axis direction in the Y-axis movable object  300 . 
     The Y-axis movable object  300  is held to be movable in the Y-axis direction, in three places of the Y-axis friction engagement portion  340 , the first Y-axis support portion  351 , and the second Y-axis support portion  352 , with respect to the X-axis movable object  200 . The pressing members  341  and  353  lift the Y-axis movable object body portion  310 , so that the Y-axis movable object body portion  310  floats from the X-axis movable object body portion  210 . 
     As illustrated in  FIG. 12 , a carrier actuator  330  is provided on a surface of the Y-axis movable object body portion  310  at the side of the lens carrier  400 . The carrier actuator  330  is held by the actuator holding portion  310   b  provided in the Y-axis movable object body portion  310 . The carrier actuator  330  and the notch portion  312  of the Y-axis movable object  300  face each other with the optical axis L between the carrier actuator  330  and the notch portion  312 . 
     The carrier actuator  330  is an actuator that configures a smooth impact drive mechanism. The carrier actuator  330  includes a prismatic Z-axis piezoelectric element  331 , a Z-axis drive shaft  332 , and a weight portion  333 . The Z-axis piezoelectric element  331  is an element that can expand and contract in the direction of the optical axis L. The Z-axis piezoelectric element  331  has the same configuration as the configuration of the X-axis piezoelectric element  131  of the X-axis actuator  130 . The expansion and the contraction of the Z-axis piezoelectric element  331  can be controlled by controlling a voltage applied to the Z-axis piezoelectric element  331 . 
     The Z-axis drive shaft  332  is formed in a columnar shape and is disposed such that an axis line of a columnar shape extends along the direction of the optical axis L. The Z-axis drive shaft  332  is configured using a composite resin material including a fiber such as a carbon fiber, similar to the X-axis drive shaft  132 . One end portion of the direction of the optical axis L in the Z-axis drive shaft  332  is fixed on one end portion of the direction of the optical axis L in the Z-axis piezoelectric element  331 . 
     The weight portion  333  is fixed on the other end portion of the direction of the optical axis L in the Z-axis piezoelectric element  331 . The weight portion  333  is designed to be heavier than the Z-axis drive shaft  332 , similar to the weight portion  133 . The weight portion  333  is fitted into the actuator holding portion  310   b  provided in the Y-axis movable object body portion  310  to be fixed, so that the carrier actuator  330  is held in the Y-axis movable object  300 . 
     An adhesive such as an epoxy adhesive can be used for fixation of the Z-axis piezoelectric element  331  and the Z-axis drive shaft  332 , fixation of the Z-axis piezoelectric element  331  and the weight portion  333 , and fixation of the weight portion  333  and the actuator holding portion  310   b.    
     Next, a configuration of the lens carrier  400  and a support configuration of the lens carrier  400  by the Y-axis movable object  300  will be described in detail. As illustrated in  FIG. 16 , the lens carrier  400  includes a carrier body portion  410 , a locking convex portion  420 , an engagement portion  430 , and a carrier convex portion  440 . 
     As illustrated in  FIGS. 16 to 18 , the lens carrier  400  is disposed to be surrounded by the first sidewall portion  311   a , the second sidewall portion  311   b , the third sidewall portion  311   c , and the fourth sidewall portion  311   d , on the Y-axis movable object body portion  310  of the Y-axis movable object  300 . The carrier body portion  410  is provided with a circular opening portion  410   a  with the optical axis L as a center. The opening portion  410   a  provided in the carrier body portion  410  and the opening portion  310   a  provided in the Y-axis movable object body portion  310  have almost the same sizes. The lens  4  is attached to the opening portion  410   a  of the carrier body portion  410 . That is, a wall surface of the opening portion  410   a  becomes a lens attachment portion  410   b  to attach the lens  4 . As such, the lens attachment portion  410   b  is provided in the carrier body portion  410 , so that the lens carrier  400  can hold the lens  4 . The lens  4  may be a lens unit configured using a plurality of lenses and may be a single lens. 
     The locking convex portion  420  protrudes from the outer circumferential surface of the carrier body portion  410  along a direction orthogonal to the optical axis L. In addition, the locking convex portion  420  extends along the optical axis L on the outer circumferential surface of the carrier body portion  410 . The locking convex portion  420  is fitted into the notch portion  312  of the Y-axis movable object  300 . A shape and a dimension of the locking convex portion  420  are almost the same as the shape and the dimension of the notch portion  312 . However, the notch portion  312  is slightly larger than the locking convex portion  420  and the locking convex portion  420  can be fitted into the notch portion  312 . Rotation of the lens carrier  400  around the optical axis L is suppressed by fitting of the locking convex portion  420  of the lens carrier  400  and the notch portion  312  of the Y-axis movable object  300 . 
     The engagement portion  430  is a member that engages with the Z-axis drive shaft  332  of the carrier actuator  330 . The engagement portion  430  is a metallic member having elasticity and is attached to the outer circumferential surface of the carrier body portion  410 . The engagement portion  430  and the locking convex portion  420  substantially face each other with the optical axis L between the engagement portion  430  and the locking convex portion  420 . 
     The engagement portion  430  includes a Z-axis friction engagement portion  431  frictionally engaging with the Z-axis drive shaft  332  and a pressing member  432 . The Z-axis friction engagement portion  431  is formed in an approximately V shape. In the Z-axis friction engagement portion  431 , an inner surface (a first inner surface  431   a  and a second inner surface  431   b ) with the approximately V shape comes into contact with the outer circumferential surface of the Z-axis drive shaft  332 . More specifically, the Z-axis friction engagement portion  431  (the first inner surface  431   a  and the second inner surface  431   b ) comes into contact with a portion of the outer circumferential surface of the Z-axis drive shaft  332  at the side of the optical axis L. The pressing member  432  and the Z-axis friction engagement portion  431  interpose the Z-axis drive shaft  332  between the pressing member  432  and the Z-axis friction engagement portion  431 . The pressing member  432  has elasticity. The Z-axis friction engagement portion  431  is biased to the side of the Z-axis drive shaft  332  by the elasticity of the pressing member  432 , so that the Z-axis friction engagement portion  431  frictionally engages with the Z-axis drive shaft  332 . 
     In a state in which the Z-axis friction engagement portion  431  of the engagement portion  430  frictionally engages with the Z-axis drive shaft  332  of the carrier actuator  330 , the Z-axis piezoelectric element  331  expands and contracts in the direction of the optical axis L, so that the lens carrier  400  is moved in the direction of the optical axis L. 
     The carrier convex portion  440  is provided on the outer circumferential surface of the carrier body portion  410  and protrudes from the outer circumferential surface of the carrier body portion  410  along a direction orthogonal to the optical axis L. The carrier convex portion  440  is provided in the vicinity of the engagement portion  430 , on the outer circumferential surface of the carrier body portion  410 . 
     As illustrated in  FIG. 19 , the auxiliary member  500  has a shape of an approximately rectangular frame surrounding the lens carrier  400 , when viewed from the direction of the optical axis L. The auxiliary member  500  is attached to the Y-axis movable object  300 . 
     For the convenience of description, four sides configuring an outer circumferential edge of the auxiliary member  500  when viewed from the direction of the optical axis L are called sides H 51 , H 52 , H 53 , and H 54 . As illustrated in  FIGS. 19 and 15 , the side H 51  is a side located at the side of the side H 31  of the Y-axis movable object  300  with respect to the optical axis L, when viewed from the direction of the optical axis L in a state in which the auxiliary member  500  overlaps the Y-axis movable object  300 . Likewise, the side H 52  is a side located at the side of the side H 32  of the Y-axis movable object  300  with respect to the optical axis L. The side H 53  is a side located at the side of the side H 33  of the Y-axis movable object  300  with respect to the optical axis L. The side H 54  is a side located at the side of the side H 34  of the Y-axis movable object  300  with respect to the optical axis L. 
     In addition, a corner portion formed by connecting the sides H 51  and H 54  is called a corner portion K 1 . Likewise, a corner portion formed by connecting the sides H 54  and H 52  is called a corner portion K 2 . A corner portion formed by connecting the sides H 52  and H 53  is called a corner portion K 3 . A corner portion formed by connecting the sides H 53  and H 51  is called a corner portion K 4 . 
     The corner portion K 1  of the auxiliary member  500  is supported (fixed) by the first sidewall portion  311   a  of the Y-axis movable object  300 . The corner portion K 2  is supported (fixed) by the second sidewall portion  311   b  of the Y-axis movable object  300 . The corner portion K 3  is supported (fixed) by the third sidewall portion  311   c  of the Y-axis movable object  300 . The corner portion K 4  is supported (fixed) by the fourth sidewall portion  311   d  of the Y-axis movable object  300 . 
     The auxiliary member  500  supports the Z-axis drive shaft  332  of the carrier actuator  330  to be movable in the direction of the optical axis L. The auxiliary member  500  comes into contact with point contact with the outer circumferential surface of the Z-axis drive shaft  332  at two points or more and supports the carrier actuator  330 . More specifically, the carrier actuator  330  is located in the corner portion K 3  in the frame of the auxiliary member  500 , when viewed from the direction of the optical axis L. An inner surface of the corner portion K 3  comes into contact with the outer circumferential surface of the Z-axis drive shaft  332 , so that the auxiliary member  500  supports the carrier actuator  330 . The Z-axis drive shaft  332  is interposed by the inner surface of the corner portion K 3  and the Z-axis friction engagement portion  431  of the engagement portion  430 , when viewed from the direction of the optical axis L. 
     In this embodiment, a support convex portion  510  is provided in an inner portion of the side H 53 . The Z-axis drive shaft  332  is located between the support convex portion  510  and the side H 52 , when viewed from the direction of the optical axis L. At the side H 53 , the Z-axis drive shaft  332  is supported in two places of a portion closer to the side H 52  than the support convex portion  510  and a portion of the support convex portion  510  facing the side H 52 . In addition, at the side H 52 , the Z-axis drive shaft  332  is supported in one place of a portion near an end portion of the side to which the side H 53  is connected. As a result, the Z-axis drive shaft  332  is supported in a total of three places in the corner portion K 3 . 
     As illustrated in  FIG. 20 , a stepped portion  520  is provided inside the side H 52  of the auxiliary member  500 . The stepped portion  520  is formed by projecting an end portion of the side H 52  opposite to the side of the Y-axis movable object body portion  310  to the side of the optical axis L. A surface of the stepped portion  520  facing the side of the Y-axis movable object  300  is defined as an auxiliary member side contact portion  521 . The auxiliary member side contact portion  521  overlaps a part of the carrier convex portion  440 , when viewed from the direction of the optical axis L. A surface of the carrier convex portion  440  facing the auxiliary member side contact portion  521  is defined as a carrier side contact portion  441 . That is, the carrier side contact portion  441  is a surface opposite to the surface of the carrier convex portion  440  at the side of the Y-axis movable object body portion  310 . 
     As such, the auxiliary member side contact portion  521  of the auxiliary member  500  and the carrier side contact portion  441  of the lens carrier  400  face each other in the direction of the optical axis L. 
     As a result, when the lens carrier  400  moves to a position separated by a predetermined distance in the direction of the optical axis L with respect to the Y-axis movable object  300 , the auxiliary member side contact portion  521  and the carrier side contact portion  441  come in contact with each other and a movement of the direction of the optical axis L in the lens carrier  400  is restricted. As such, the auxiliary member side contact portion  521  and the carrier side contact portion  441  function as a carrier stopper mechanism for restricting the movement of the direction of the optical axis L in the lens carrier  400 . 
     As illustrated in  FIG. 19 , the auxiliary member side contact portion  521  (stepped portion  520 ) and the carrier side contact portion  441  (carrier convex portion  440 ) configuring the carrier stopper mechanism are provided in the corner portion K 3  in which the carrier actuator  330  is disposed, among the corner portions of the auxiliary member  500 . 
     Here, the provision of the auxiliary member side contact portion  521  or the like in the corner portion K 3  means that the auxiliary member side contact portion  521  or the like is provided closer to the corner portion K 3  than the other corner portions. The provision of the auxiliary member side contact portion  521  or the like in the corner portion K 3  means a region around a connection portion of the sides H 52  and H 53 , not a connection point of the sides H 52  and H 53 . 
     For example, a center position in an extension direction of the side H 51  is defined as a center point H 51   a  and a center position in an extension direction of the side H 52  is defined as a center point H 52   a . A center position in an extension direction of the side H 53  is defined as a center point H 53   a  and a center position in an extension direction of the side H 54  is defined as a center point H 54   a . A straight line passing the center points H 5  la and H 52   a  when viewed from the direction of the optical axis L is defined as a virtual line VL 1 . Likewise, a straight line passing the center points H 53   a  and H 54   a  is defined as a virtual line VL 2 . The provision of the auxiliary member side contact portion  521  or the like in the corner portion K 3  includes provision of the auxiliary member side contact portion  521  or the like in a region separated by the virtual line VL 1  towards the side H 53  and by the virtual line VL 2  towards the side H 52 , around the auxiliary member  500 , when viewed from the direction of the optical axis L. 
     Next, electric wiring lines connected to each actuator, sensors detecting a position of the X-axis movable object  200  or the like, and electric wiring lines connected to each sensor will be described. First, electric wiring lines and sensors provided in the base member  100  will be described. As illustrated in  FIG. 4 , a hall sensor HS 1 , a hall sensor HS 2 , and electric wiring lines W 101  to W 118  are provided on the surface of the base body portion  110  at the side which the X-axis movable object  200  overlaps. 
     The hall sensor HS 1  functions as a position sensor that detects a position of the X-axis movable object  200  moving in the X-axis direction with respect to the base member  100 . The hall sensor HS 1  is provided in the same side with the side H 13  against the opening portion  110   a  in the base body portion  110 . One end side of the electric wiring lines W 101  to W 104  is connected to the hall sensor HS 1 . The other end sides of the electric wiring lines W 101  to W 104  extend to the side H 13  of the base body portion  110 . 
     One end side of the electric wiring lines W 105  and W 106  is connected to the X-axis piezoelectric element  131  of the X-axis actuator  130  and the other end sides thereof extend to the side H 13  of the base body portion  110 . The electric wiring lines W 105  and W 106  supply power to the X-axis piezoelectric element  131 . 
     Concave connection points P 31  and P 32  are provided in the corner portion of the base body portion  110  in which the sides H 13  and H 12  are connected. One end side of the electric wiring lines W 107  and W 108  extends to the connection points P 31  and P 32  and the other end sides thereof extend to the side H 13  of the base body portion  110 . Concave connection points P 41  and P 42  are provided in the corner portion of the base body portion  110  in which the sides H 13  and H 11  are connected. One end side of the electric wiring lines W 109  and W 110  extends to the connection points P 41  and P 42  and the other end sides thereof extend to the side H 13  of the base body portion  110 . 
     The hall sensor HS 2  functions as a position sensor that detects a position of the Y-axis movable object  300  moving in the Y-axis direction with respect to the base member  100 . The hall sensor HS 2  is provided at a position near the corner portion of the base body portion  110  in which the sides H 11  and H 14  are connected. The hall sensor HS 2  is provided on the raised portion  110   c  to be raised to the side of the Y-axis movable object  300  in the base body portion  110 . One end side of the electric wiring lines W 111  to W 114  is connected to the hall sensor HS 2 . The other end sides of the electric wiring lines W 111  to W 114  extend to the side H 14  of the base body portion  110 . 
     As illustrated in  FIG. 6 , the X-axis movable object body portion  210  of the X-axis movable object  200  has a shape to be kept away from the hall sensor HS 2  and the raised portion  110   c  when viewed from the direction of the optical axis L, not to interfere with the hall sensor HS 2  and the raised portion  110   c.    
     As illustrated in  FIG. 4 , concave connection points P 11  and P 12  are provided in the corner portion of the base body portion  110  in which the sides H 11  and H 14  are connected. One end side of the electric wiring lines W 115  and W 116  extends to the connection points P 11  and P 12  and the other end sides thereof extend to the side H 14  of the base body portion  110 . Concave connection points P 21  and P 22  are provided in the corner portion of the base body portion  110  in which the sides H 12  and H 14  are connected. One end side of the electric wiring lines W 117  and W 118  extends to the connection points P 21  and P 22  and the other end sides thereof extend to the side H 14  of the base body portion  110 . 
     An edge portion of an opening of the connection point P 11  is formed in an approximately tapered shape in which a diameter decreases toward the side of a concave bottom portion. Similar to the edge portion of the opening of the connection point P 11 , edge portions of openings of the connection points P 12 , P 21 , P 22 , P 31 , P 32 , P 41 , and P 42  are formed in an approximately tapered shape. 
     Next, electric wiring lines or the like provided in the X-axis movable object  200  will be described. As illustrated in  FIG. 6 , a magnet MG 1  and electric wiring lines W 201  and W 202  are provided in the X-axis movable object  200 . The magnet MG 1  is provided in a concave portion provided at a position between the first convex portion  211  and the second convex portion  212 , on the surface of the X-axis movable object body portion  210  at the side which the Y-axis movable object  300  overlaps. In addition, positions of the hall sensor HS 1  provided in the base member  100  and the magnet MG 1  overlap each other in the direction of the optical axis L. The hall sensor HS 1  detects the position of the X-axis movable object  200  with respect to the base member  100 , on the basis of a change of a magnetic field of the magnet MG 1  moving with the X-axis movable object body portion  210 . The X-axis actuator  130  is feedback-controlled on the basis of a detection result of the hall sensor HS 1 . 
     Connection points Q 41  and Q 42  are provided on a surface of the projection portion  260   a  of the rising portion  260  at the side of the Y-axis movable object  300 . The connection points Q 41  and Q 42  have a shape of a hole that penetrates the projection portion  260   a  in the direction of the optical axis L. Edge portions of openings of the connection points Q 41  and Q 42  at the side of the Y-axis movable object  300  are formed in an approximately tapered shape in which a diameter decreases toward the openings of the side of the base member  100 . 
     In a state in which the X-axis movable object  200  is located at an X-axis reference position with respect to the base member  100 , positions of the connection points Q 41  and Q 42  are matched with positions of the connection points P 41  and P 42  provided in the base body portion  110 , respectively, when viewed from the direction of the optical axis L. In addition, the X-axis reference position is a position (initial position) before the X-axis movable object  200  is moved in the X-axis direction with respect to the base member  100 . For example, the X-axis reference position is a position of the X-axis movable object  200  when the X-axis friction engagement portion  240  of the X-axis movable object  200  is at an intermediate position of the first convex portion  111  and the second convex portion  112  of the base member  100 . 
     One end side of the electric wiring lines W 201  and W 202  is connected to the Y-axis piezoelectric element  231  of the Y-axis actuator  230  and the other end sides thereof extend to the connection points Q 41  and Q 42  provided in the projection portion  260   a . The electric wiring lines W 201  and W 202  supply power to the Y-axis piezoelectric element  231 . 
     The electric wiring line W 201  provided in the rising portion  260  of the X-axis movable object  200  and the electric wiring line W 109  provided in the base member  100  are connected by a conductive suspension wire (second suspension wire) SW 41 . The electric wiring line W 202  provided in the rising portion  260  and the electric wiring line W 110  provided in the base member  100  are connected by a conductive suspension wire (second suspension wire) SW 42 . 
     Specifically, one end of the suspension wire SW 41  is inserted into the connection point P 41  and the other end thereof passes through the connection point Q 41 . The suspension wire SW 41  and the electric wiring line W 109  are connected to each other by solder or conductive paste at the connection point P 41 . In addition, the edge portion of the opening of the connection point P 41  is formed in a tapered shape, so that it is easy to cause the solder or the conductive paste to flow into the connection point P 41 , and the suspension wire SW 41  and the electric wiring line W 109  can be easily connected. In addition, the suspension wire SW 41  can be easily mounted. Because an edge portion of an opening of a connection point is formed in a tapered shape even in connection of other connection point such as the connection point P 42  and other suspension wire such as the suspension wire SW 42 , the same effect as the case of the connection point P 41  is achieved. The suspension wire SW 41  and the electric wiring line W 201  are connected to each other by the solder or the conductive paste at the connection point Q 41 . 
     One end of the suspension wire SW 42  is inserted into the connection point P 42  and the other end thereof passes through the connection point Q 42 . The suspension wire SW 42  and the electric wiring line W 110  are connected to each other by the solder or the conductive paste at the connection point P 42 . The suspension wire SW 42  and the electric wiring line W 202  are connected to each other by the solder or the conductive paste at the connection point Q 42 . 
     Here, as illustrated in  FIG. 12 , the projection portion  260   a  is located in the same side with the lens carrier  400  against the surface of the Y-axis movable object body portion  310  at the side of the X-axis movable object  200 , in the direction of the optical axis L. That is, connection positions of the electric wiring lines W 201  and W 202  provided in the projection portion  260   a  and the suspension wires SW 41  and SW 42  are located in the same side with the lens carrier  400  against the surface of the Y-axis movable object body portion  310  at the side of the X-axis movable object  200 , in the direction of the optical axis L. The rising portion  260  is provided in the X-axis movable object  200  and one end of the suspension wires SW 41  and SW 42  is connected, so that the connection positions of the electric wiring lines W 201  and W 202  of the side of the X-axis movable object  200  and the suspension wires SW 41  and SW 42  can be separated from the base member  100  (set to a far position). 
     Next, electric wiring lines or the like provided in the Y-axis movable object  300  will be described. As illustrated in  FIGS. 2 and 12 , a hall sensor HS 3 , a magnet MG 2 , and electric wiring lines W 301  to W 306  are provided in the Y-axis movable object  300 . The magnet MG 2  is provided in the corner portion of the Y-axis movable object body portion  310  in which the first sidewall portion  311   a  rises. In addition, positions of the hall sensor HS 2  provided in the base member  100  and the magnet MG 2  overlap each other in the direction of the optical axis L. The hall sensor HS 2  detects a position of the Y-axis movable object  300  with respect to the base member  100 , on the basis of a change of a magnetic field of the magnet MG 2  moving with the Y-axis movable object body portion  310 . The Y-axis actuator  230  is feedback-controlled on the basis of a detection result of the hall sensor HS 2 . 
     Connection points Q 11  and Q 12  are provided on a surface of the first wiring line connection portion  321  at the side of the auxiliary member  500 . The connection points Q 11  and Q 12  have a shape of a hole that penetrates the first wiring line connection portion  321  in the direction of the optical axis L. Edge portions of openings of the connection points Q 11  and Q 12  at the side of the auxiliary member  500  are formed in an approximately tapered shape in which a diameter decreases toward the openings of the side of the base member  100 . 
     Connection points Q 21  and Q 22  are provided on a surface of the second wiring line connection portion  322  at the side of the auxiliary member  500 . The connection points Q 21  and Q 22  have a shape of a hole that penetrates the second wiring line connection portion  322  in the direction of the optical axis L. Edge portions of openings of the connection points Q 21  and Q 22  at the side of the auxiliary member  500  are formed in an approximately tapered shape in which a diameter decreases toward the openings of the side of the base member  100 . 
     Connection points Q 31  and Q 32  are provided on a surface of the third wiring line connection portion  323  at the side of the auxiliary member  500 . The connection points Q 31  and Q 32  have a shape of a hole that penetrates the third wiring line connection portion  323  in the direction of the optical axis L. Edge portions of openings of the connection points Q 31  and Q 32  at the side of the auxiliary member  500  are formed in an approximately tapered shape in which a diameter decreases toward the openings of the side of the base member  100 . 
     In a state in which the Y-axis movable object  300  is located at a Y-axis reference position with respect to the base member  100  and the X-axis movable object  200  is located at the X-axis reference position with respect to the base member  100 , positions of the connection points Q 11  and Q 12  are matched with positions of the connection points P 11  and P 12  provided in the base body portion  110 , respectively, when viewed from the direction of the optical axis L. Likewise, positions of the connection points Q 21  and Q 22  are matched with positions of the connection points P 21  and P 22  provided in the base body portion  110 , respectively. Positions of the connection points Q 31  and Q 32  are matched with positions of the connection points P 31  and P 32  provided in the base body portion  110 , respectively. 
     In addition, the Y-axis reference position is a position (initial position) before the X-axis movable object  200  is located at the X-axis reference position and the Y-axis movable object  300  is moved in the Y-axis direction with respect to the base member  100 . For example, the Y-axis reference position is a position of the Y-axis movable object  300  when the X-axis movable object  200  is located at the X-axis reference position and the Y-axis friction engagement portion  340  of the Y-axis movable object  300  is at an intermediate position of the first convex portion  211  and the second convex portion  212  of the X-axis movable object  200 . 
     The hall sensor HS 3  functions as a position sensor that detects a position of the lens carrier  400  moving in the direction of the optical axis L with respect to the Y-axis movable object  300 . The hall sensor HS 3  is provided on the surface of the second sidewall portion  311   b  at the side of the opening portion  310   a . One end side of the electric wiring lines W 301  to W 304  is connected to the hall sensor HS 3 . The other end sides of the electric wiring lines (second electric wiring lines) W 301  and W 302  extend to the connection points Q 11  and Q 12  provided in the first wiring line connection portion  321 . The other end sides of the electric wiring lines (first electric wiring lines) W 303  and W 304  extend to the connection points Q 21  and Q 22  provided in the second wiring line connection portion  322  (refer to  FIG. 2 ). 
     One end side of the electric wiring lines W 305  and W 306  is connected to the Z-axis piezoelectric element  331  of the carrier actuator  330  and the other end sides thereof extend to the connection points Q 31  and Q 32  provided in the third wiring line connection portion  323 . The electric wiring lines W 305  and W 306  supply power to the Z-axis piezoelectric element  331 . 
     The electric wiring line W 301  provided in the first wiring line connection portion  321  of the Y-axis movable object  300  and the electric wiring line W 115  provided in the base member  100  are connected by a conductive suspension wire (fourth suspension wire) SW 11 . The electric wiring line W 302  provided in the first wiring line connection portion  321  and the electric wiring line W 116  provided in the base member  100  are connected by a conductive suspension wire (fourth suspension wire) SW 12 . 
     Specifically, one end of the suspension wire SW 11  is inserted into the connection point P 11  and the other end thereof passes through the connection point Q 11 . The suspension wire SW 11  and the electric wiring line W 115  are connected to each other by the solder or the conductive paste at the connection point P 11 . The suspension wire SW 11  and the electric wiring line W 301  are connected to each other by the solder or the conductive paste at the connection point Q 11 . In addition, one end of the suspension wire SW 12  is inserted into the connection point P 12  and the other end thereof passes through the connection point Q 12 . The suspension wire SW 12  and the electric wiring line W 116  are connected to each other by the solder or the conductive paste at the connection point P 12 . The suspension wire SW 12  and the electric wiring line W 302  are connected to each other by the solder or the conductive paste at the connection point Q 12 . 
     The electric wiring line W 303  provided in the second wiring line connection portion  322  of the Y-axis movable object  300  and the electric wiring line W 117  provided in the base member  100  are connected by a conductive suspension wire (third suspension wire) SW 21  (refer to  FIG. 2 ). The electric wiring line W 304  provided in the second wiring line connection portion  322  and the electric wiring line W 118  provided in the base member  100  are connected by a conductive suspension wire (third suspension wire) SW 22 . 
     Specifically, one end of the suspension wire SW 21  is inserted into the connection point P 21  and the other end thereof passes through the connection point Q 21 . The suspension wire SW 21  and the electric wiring line W 117  are connected to each other by the solder or the conductive paste at the connection point P 21 . The suspension wire SW 21  and the electric wiring line W 303  are connected to each other by the solder or the conductive paste at the connection point Q 21 . In addition, one end of the suspension wire SW 22  is inserted into the connection point P 22  and the other end thereof passes through the connection point Q 22 . The suspension wire SW 22  and the electric wiring line W 118  are connected to each other by the solder or the conductive paste at the connection point P 22 . The suspension wire SW 22  and the electric wiring line W 304  are connected to each other by the solder or the conductive paste at the connection point Q 22 . 
     The electric wiring line W 305  provided in the third wiring line connection portion  323  of the Y-axis movable object  300  and the electric wiring line W 107  provided in the base member  100  are connected by a conductive suspension wire (first suspension wire) SW 31  (refer to  FIG. 2 ). The electric wiring line W 306  provided in the third wiring line connection portion  323  and the electric wiring line W 108  provided in the base member  100  are connected by a conductive suspension wire (first suspension wire) SW 32 . 
     Specifically, one end of the suspension wire SW 31  is inserted into the connection point P 31  and the other end thereof passes through the connection point Q 31 . The suspension wire SW 31  and the electric wiring line W 107  are connected to each other by the solder or the conductive paste at the connection point P 31 . The suspension wire SW 31  and the electric wiring line W 305  are connected to each other by the solder or the conductive paste at the connection point Q 31 . In addition, one end of the suspension wire SW 32  is inserted into the connection point P 32  and the other end thereof passes through the connection point Q 32 . The suspension wire SW 32  and the electric wiring line W 108  are connected to each other by the solder or the conductive paste at the connection point P 32 . The suspension wire SW 32  and the electric wiring line W 306  are connected to each other by the solder or the conductive paste at the connection point Q 32 . 
     In connection positions of the electric wiring lines W 301  to W 306  provided in the Y-axis movable object  300  and the suspension wires SW 11 , SW 12 , SW 21 , SW 22 , SW 31 , and SW 32 , height positions along the direction of the optical axis L from the base member  100  are almost the same. In addition, in a connection position of the electric wiring line W 301  provided in the Y-axis movable object  300  and the suspension wire SW 11  and a connection position of the electric wiring line W 201  provided in the X-axis movable object  200  and the suspension wire SW 41 , height positions along the direction of the optical axis L from the base member  100  are almost the same. Here, “the heights are almost the same” includes the case in which the heights are completely matched and the case in which there is a slight difference in a range for the purpose of aligning the heights. As a result, lengths of the suspension wires SW 11 , SW 12 , SW 21 , SW 22 , SW 31 , SW 32 , SW 41 , and SW 42  are almost the same. 
     As illustrated in  FIG. 4 , each of the suspension wires SW 11  and SW 12 , the suspension wires SW 21  and SW 22 , the suspension wires SW 31  and SW 32 , and the suspension wires SW 41  and SW 42  is configured as a set. The individual sets of suspension wires are located in the four corner portions of the base member  100 , respectively. 
     As illustrated in  FIG. 12 , the suspension wires SW 41  and SW 42  are connected to the electric wiring lines W 201  and W 202  provided in the projection portion  260   a  projecting to the outside in the rising portion  260 . As such, the projection portion  260   a  is provided, so that, when the X-axis movable object  200  moves in the X-axis direction with respect to the base member  100 , the suspension wires SW 41  and SW 42  can be prevented from coining into contact with a base end portion of the rising portion  260 . 
     In addition, the suspension wires SW 11  and SW 12  are connected to the electric wiring lines W 301  and W 302  provided in the first wiring line connection portion  321  projecting from the first sidewall portion  311   a  to the outside. As such, the first wiring line connection portion  321  is provided, so that, when the Y-axis movable object  300  moves in the X-axis direction and the Y-axis direction with respect to the base member  100 , the suspension wires SW 11  and SW 12  can be prevented from coining into contact with a base end portion of the first sidewall portion  311   a . Likewise, for the second wiring line connection portion  322  and the third wiring line connection portion  323 , the suspension wires SW 21  and SW 22  can be prevented from coining into contact with a base end portion of the second sidewall portion  311   b  and the suspension wires SW 31  and SW 32  can be prevented from coining into contact with a base end portion of the third sidewall portion  311   c.    
     Next, a magnet MG 3  provided in the lens carrier  400  will be described. As illustrated in  FIG. 18 , the magnet MG 3  is provided at a position facing the hall sensor HS 3  in the carrier body portion  410 . The hall sensor HS 3  detects a position of the lens carrier  400  for the Y-axis movable object  300 , on the basis of a change of a magnetic field of the magnet MG 3  moving with the carrier body portion  410 . The carrier actuator  330  is feedback-controlled on the basis of a detection result of the hall sensor HS 3 . 
     Next, a relation of a holding position of the X-axis movable object  200  by the base member  100  and a gravity center position of each portion will be described. As illustrated in  FIG. 10 , a portion in which the X-axis friction engagement portion  240  comes into contact with the X-axis drive shaft  132  is defined as a contact portion T 1 . A portion in which the raised portion  251   c  of the first X-axis support portion  251  comes into contact with the shaft portion  122  of the X-axis movable object holding portion  120  is defined as a contact portion T 2 . A portion in which the raised portion  252   c  of the second X-axis support portion  252  comes into contact with the shaft portion  122  of the X-axis movable object holding portion  120  is defined as a contact portion T 3 . A triangle with the contact portions T 1  to T 3  as vertexes is defined as a first triangle S 1 . A first gravity center to be a gravity center obtained by combining a gravity center of the X-axis movable object  200 , a gravity center of the Y-axis movable object  300 , a gravity center of the lens carrier  400 , and a gravity center of the auxiliary member  500  is located at an inner side of the first triangle S 1 , when viewed from the direction of the optical axis L. In addition, the first gravity center is preferably close to a center position (gravity center position) of the first triangle S 1 . 
     Next, a relation of a holding position of the Y-axis movable object  300  by the X-axis movable object  200  and a gravity center position of each portion will be described. As illustrated in  FIG. 15 , a portion in which the Y-axis friction engagement portion  340  comes into contact with the Y-axis drive shaft  232  is defined as a contact portion T 4 . A portion in which the raised portion  351   c  of the first Y-axis support portion  351  comes into contact with the shaft portion  222  of the Y-axis movable object holding portion  220  is defined as a contact portion T 5 . A portion in which the raised portion  352   c  of the second Y-axis support portion  352  comes into contact with the shaft portion  222  of the Y-axis movable object holding portion  220  is defined as a contact portion T 6 . A triangle with the contact portions T 4  to T 6  as vertexes is defined as a second triangle S 2 . A second gravity center to be a gravity center obtained by combining a gravity center of the Y-axis movable object  300 , a gravity center of the lens carrier  400 , and a gravity center of the auxiliary member  500  is located at an inner side of the second triangle S 2 , when viewed from the direction of the optical axis L. In addition, the second gravity center is preferably close to a center position (gravity center position) of the second triangle S 2 . 
     The first convex portion  111  and the second convex portion  112  functioning as the X-axis stopper mechanism and provided in the base body portion  110  and the first convex portion  211  and the second convex portion  212  functioning as the Y-axis stopper mechanism and provided in the X-axis movable object body portion  210  restrict movement ranges of the X-axis movable object  200  and the Y-axis movable object  300 , such that a first gravity center is located at the inner side of the first triangle S 1  and a second gravity center is located at the inner side of the second triangle S 2 . As such, the movement ranges of the X-axis movable object  200  and the Y-axis movable object  300  are restricted by the X-axis stopper mechanism and the Y-axis stopper mechanism, so that a state in which the first gravity center is located at the inner side of the first triangle S 1  and the second gravity center is located at the inner side of the second triangle S 2  is maintained. 
     Here, the contact portions T 1  to T 6  will be described. As for the contact portions, when two members come into point contact with each other, like the contact portions T 2 , T 3 , T 5 , and T 6 , a point contact position is defined as the contact portion. In addition, when two members come into line contact with each other in two lines, like the contact portions T 1  and T 4 , a center position (gravity center position) of a region interposed by two contact lines coining into line contact with each other is defined as the contact portion. Specifically, as illustrated in  FIG. 10 , the V-shaped surface  240   a  of the X-axis friction engagement portion  240  and the X-axis drive shaft  132  come into line contact with each other in two contact lines TL (shown by virtual lines (two-dot chain lines) in  FIG. 10 ). A region interposed by the two contact lines TL when viewed from the direction of the optical axis L is defined as a region R (hatched to clarify the region). The contact portion T 1  of the X-axis friction engagement portion  240  and the X-axis drive shaft  132  becomes a center position (gravity center position) of the region R. In addition, when two members come into surface contact with each other, a center position (gravity center position) of a surface contact region when viewed from the direction of the optical axis L is defined as the contact portion. 
     This embodiment is configured as described above. In the lens drive device  1 , the connection positions of the suspension wires SW 31  and SW 32  and the electric wiring lines W 305  and W 306  provided in the third wiring line connection portion  323  of the Y-axis movable object  300  and the connection positions of the suspension wires SW 41  and SW 42  and the electric wiring lines W 201  and W 202  provided in the projection portion  260   a  of the X-axis movable object  200  are almost the same height positions. Therefore, the suspension wires SW 31  and SW 32  and the suspension wires SW 41  and SW 42  have almost the same lengths. As a result, an influence (elastic influence) on the X-axis movable object  200  from the suspension wires SW 41  and SW 42  when the X-axis movable object  200  moves and an influence (elastic influence) on the Y-axis movable object  300  from the suspension wires SW 31  and SW 32  when the Y-axis movable object  300  moves can be equalized (aligned). As such, the influences on the X-axis movable object  200  and the Y-axis movable object  300  from the suspension wires SW 31 , SW 32 , SW 41 , and SW 42  are equalized. For this reason, even though the suspension wires SW 31  and SW 32  and the suspension wires SW 41  and SW 42  are provided, the X-axis movable object  200  and the Y-axis movable object  300  can be stably moved by suppressing movement variations of the X-axis movable object  200  and the Y-axis movable object  300 . 
     The X-axis movable object holding portion  120  holds the X-axis movable object  200  to be movable in the X-axis direction. As a result, when the X-axis movable object  200  is moved by the X-axis actuator  130 , the X-axis movable object  200  can be stably moved in the X-axis direction by suppressing looseness. In addition, the X-axis movable object holding portion  120  is provided at the position facing the X-axis actuator  130  with the optical axis L between the X-axis movable object holding portion  120  and the X-axis actuator  130  in the base member  100 , so that the X-axis movable object holding portion  120  can hold the X-axis movable object  200  with the gravity center of the lens  4  between the X-axis movable object holding portion  120  and the X-axis actuator  130 . As a result, the lens drive device  1  can move the X-axis movable object  200  in the X-axis direction more stably by the X-axis actuator  130  and the X-axis movable object holding portion  120 . 
     Likewise, for the Y-axis movable object  300 , the lens drive device  1  includes the Y-axis movable object holding portion  220 . Therefore, when the Y-axis movable object  300  is moved, the Y-axis movable object  300  can be stably moved in the Y-axis direction by suppressing looseness. In addition, the Y-axis movable object holding portion  220  is provided at the position facing the Y-axis actuator  230  with the optical axis L between the Y-axis movable object holding portion  220  and the Y-axis actuator  230  in the X-axis movable object  200 , so that the Y-axis movable object holding portion  220  can hold the Y-axis movable object  300  with the gravity center of the lens  4  between the Y-axis movable object holding portion  220  and the Y-axis actuator  230 . As a result, the lens drive device  1  can move the Y-axis movable object  300  in the Y-axis direction more stably by the Y-axis actuator  230  and the Y-axis movable object holding portion  220 . 
     The X-axis friction engagement portion  240  frictionally engages with the outer circumference of the X-axis drive shaft  132  of the X-axis actuator  130 . The Y-axis friction engagement portion  340  frictionally engages with the outer circumference of the Y-axis drive shaft  232  of the Y-axis actuator  230 . The Z-axis friction engagement portion  431  frictionally engages with the outer circumference of the Z-axis drive shaft  332  of the carrier actuator  330 . In this case, the X-axis piezoelectric element  131 , the Y-axis piezoelectric element  231 , and the Z-axis piezoelectric element  331  are expanded and contracted, so that the X-axis movable object  200 , the Y-axis movable object  300 , and the lens carrier  400  can be moved in the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively. 
     The rising portion  260  is provided in the X-axis movable object  200  and the electric wiring lines W 201  and W 202  provided in the projection portion  260   a  of the rising portion  260  and the suspension wires SW 41  and SW 42  are connected to each other, respectively. As such, the rising portion  260  is provided in the X-axis movable object  200 , so that the connection positions of the suspension wires SW 41  and SW 42  and the electric wiring lines W 201  and W 202  provided in the projection portion  260   a  can be separated from the base member  100 . In addition, the connection positions of the suspension wires SW 31  and SW 32  and the electric wiring lines W 305  and W 306  of the Y-axis movable object  300  and the connection positions of the suspension wires SW 41  and SW 42  and the electric wiring lines W 201  and W 202  of the projection portion  260   a  are almost the same height positions. For this reason, the individual connection positions can be separated from the base member  100 . As such, the connection positions are separated from the base member  100 , so that the large lengths of the suspension wires SW 31  and SW 32  and the suspension wires SW 41  and SW 42  can be secured. When the X-axis movable object  200  and the Y-axis movable object  300  on the base member  100  move, the influences on the X-axis movable object  200  and the Y-axis movable object  300  from the suspension wires SW 31 , SW 32 , SW 41 , and SW 42  can be decreased (the elasticity can be decreased by increasing the lengths). As a result, even though the suspension wires SW 31 , SW 32 , SW 41 , and SW 42  are provided, the X-axis movable object  200  and the Y-axis movable object  300  on the base member  100  can be moved more stably. 
     Each of the suspension wires SW 11  and SW 12 , the suspension wires SW 21  and SW 22 , the suspension wires SW 31  and SW 32 , and the suspension wires SW 41  and SW 42  is configured as the set. The individual sets of suspension wires SW are located in the four corner portions of the rectangular base member  100 , respectively. As such, the suspension wires SW 11  and SW 12 , the suspension wires SW 21  and SW 22 , the suspension wires SW 31  and SW 32 , and the suspension wires SW 41  and SW 42  are provided in the four corner portions of the base member  100 , respectively. Therefore, when the suspension wires affect the X-axis movable object  200  and the Y-axis movable object  300  on the base member  100 , the deviation of the influences can be suppressed. In addition, even when a vibration is input to the lens drive unit  2 , the X-axis movable object  200 , the Y-axis movable object  300 , the lens carrier  400 , and the auxiliary member  500  can be effectively held with respect to the base member  100 . 
     (Modification) 
     Next, a modification of the carrier stopper mechanism for restricting the movement of the lens carrier in the direction of the optical axis L will be described. In the description of the modification, the same components as the components of the lens drive unit  2  according to the embodiment are denoted with the same reference numerals and the detailed description thereof is omitted. In this modification, the configuration of the lens carrier  400  according to the embodiment is changed. As illustrated in  FIGS. 21 and 22 , a lens carrier  400 A according to this modification includes the carrier body portion  410 , the locking convex portion  420 , the engagement portion  430 , and a carrier convex portion  440 A. 
     The carrier convex portion  440 A protrudes from an end face of the carrier body portion  410  at the side covered with the cover  3  along the direction of the optical axis L. A top portion of the carrier convex portion  440 A and an inner surface of the cover  3  face each other. The carrier convex portion  440 A is provided in the corner portion K 3  of the auxiliary member  500 , similar to the carrier convex portion  440  according to the embodiment. 
     The top portion of the carrier convex portion  440 A and the inner surface of the cover  3  face each other. As a result, when the lens carrier  400 A moves to a position separated by a predetermined distance in the direction of the optical axis L with respect to the Y-axis movable object  300 , the top portion of the carrier convex portion  440 A and the inner surface of the cover  3  come into contact with each other and the movement of the lens carrier  400 A in the direction of the optical axis L is restricted. As such, the carrier convex portion  440 A to come into contact with the cover  3  is provided in the lens carrier  400 A and the carrier convex portion  440 A configured to function as the carrier stopper is intentionally caused to come into contact with the inner surface of the cover  3 , so that the movement of the lens carrier  400 A in the direction of the optical axis L can be restricted. 
     The embodiment of the present disclosure has been described. However, the present disclosure is not limited to the embodiment. For example, the X-axis movable object holding portion  120  may not be provided integrally with the base body portion  110  and may be separately provided. Likewise, the Y-axis movable object holding portion  220  may not be provided integrally with the X-axis movable object body portion  210  and may be separately provided. In addition, the hall sensors HS 1  to HS 3  are used as the position sensors to detect the position of the X-axis movable object  200  or the like. However, position sensors other than the hall sensors may be used. 
     The lens drive device  1  may not include the X-axis movable object holding portion  120  and the Y-axis movable object holding portion  220 . The X-axis actuator  130  may be an actuator having a configuration other than the configuration including the X-axis piezoelectric element  131 . The X-axis actuator  130  may have a configuration capable of moving the X-axis movable object  200  in the X-axis direction by engaging with the X-axis movable object  200 . The Y-axis actuator  230  may be an actuator having a configuration other than the configuration including the Y-axis piezoelectric element  231 . The Y-axis actuator  230  may have a configuration capable of moving the Y-axis movable object  300  in the Y-axis direction by engaging with the Y-axis movable object  300 . The carrier actuator  330  may be an actuator having a configuration other than the configuration including the Z-axis piezoelectric element  331 . The carrier actuator  330  may have a configuration capable of moving the lens carrier  400  in the direction of the optical axis L by engaging with the lens carrier  400 . 
     In addition, the present disclosure is not limited to the configuration in which the rising portion  260  is provided and the height positions of the connection position of the suspension wire SW 41  and the electric wiring line W 201  provided in the X-axis movable object  200  and the connection position of the suspension wire SW 31  and the electric wiring line W 305  provided in the Y-axis movable object  300  are almost the same. For example, the present disclosure may have a configuration in which the rising portion  260  is not provided and the connection position of the suspension wire SW 31  and the electric wiring line W 305  provided in the Y-axis movable object  300  is caused to be close to the side of the X-axis movable object  200 , so that the height positions of the connection position of the suspension wire SW 41  and the electric wiring line W 201  provided in the X-axis movable object  200  and the connection position of the suspension wire SW 31  and the electric wiring line W 305  provided in the Y-axis movable object  300  are almost the same.