JP6863146B2 - Lens drive device - Google Patents

Description

The present invention relates to a lens driving device.

For example, Patent Document 1 describes a lens driving device used in an imaging device mounted on a mobile phone or the like. The lens driving device disclosed in Patent Document 1 realizes a camera shake correction function by moving the lens unit in two directions orthogonal to the optical axis direction. Further, this lens driving device realizes a zoom function (focus function) by moving the lens unit in the optical axis direction.

Japanese Unexamined Patent Publication No. 2011-65140

Such a lens driving device realizes a camera shake correction function and a focus function by moving a plurality of members in the X-axis direction, the Y-axis direction, and the Z-axis direction by a plurality of actuators, respectively. Therefore, in the lens driving device, there is a demand for a configuration in which movement is not hindered between the members, that is, a configuration in which crosstalk does not occur between the moving members.

Therefore, one aspect of the present invention is to provide a lens driving device capable of suppressing the occurrence of crosstalk between moving members.

One aspect of the present invention is a lens driving device for driving a lens, which connects a base member, a movable body, a base member and a movable body, and connects the movable body to the base member in the X-axis direction and the X-axis. The first actuator that moves in the Y-axis direction orthogonal to the direction, the lens carrier to which the lens can be attached, and the movable body and the lens carrier are connected, and the lens carrier is moved in the X-axis direction and the Y-axis direction with respect to the movable body. It includes a second actuator that moves in the orthogonal Z-axis direction.

According to this lens driving device, each member is sequentially connected in the order of the base member, the first actuator, the movable body, the second actuator, and the lens carrier. As a result, when the first actuator moves the movable body with respect to the base member, the first actuator moves the entire member (movable body, second actuator, lens carrier) from the movable body to the lens carrier. When the second actuator moves the lens carrier with respect to the movable body, only the lens carrier is moved by the second actuator. As a result, even when the first actuator and the second actuator move each member, the movement is not hindered between the members. Therefore, the lens driving device can suppress the occurrence of crosstalk between the moving members.

The movable body includes an X-axis movable body and a Y-axis movable body, the first actuator includes an X-axis actuator and a Y-axis actuator, and the X-axis actuator connects a base member and an X-axis movable body. Then, the X-axis movable body is moved in the X-axis direction with respect to the base member, and the Y-axis actuator connects the X-axis movable body and the Y-axis movable body with respect to the X-axis movable body. The second actuator may connect the Y-axis movable body and the lens carrier and move the lens carrier in the Z-axis direction with respect to the Y-axis movable body. In this case, the lens driving device can move the X-axis movable body in the X-axis direction and the Y-axis movable body in the Y-axis direction by using the X-axis actuator and the Y-axis actuator. Further, even when the X-axis actuator and the Y-axis actuator move the X-axis movable body and the Y-axis movable body, respectively, the movement is not hindered between the moved members. As a result, the lens driving device can suppress the occurrence of crosstalk between the moving members.

The lens driving device further includes a plurality of first suspension wires connecting the base member and the X-axis movable body, the first suspension wire has conductivity, and the Y-axis actuator bases via the first suspension wire. It may be connected to the first power supply wiring provided in the member. In this case, the lens driving device can supply electric power to the Y-axis actuator moving with respect to the base member via the first suspension wire.

The lens driving device further includes a plurality of second suspension wires connecting the base member and the Y-axis movable body, the second suspension wire has conductivity, and the second actuator bases via the second suspension wire. It may be connected to the second power supply wiring provided in the member. In this case, the lens driving device can supply electric power to the second actuator moving with respect to the base member via the second suspension wire.

The base member includes a base body portion having an opening through which the optical axis of the lens passes, and the base body portion has a substantially rectangular plate shape having four corners when viewed along the optical axis direction of the lens. The base main body and the X-axis movable body are arranged side by side along the optical axis direction, and the plurality of first suspension wires are arranged side by side along the side connecting the adjacent corners to form the base main body. And the X-axis movable body may be connected to each other. As a result, even if only a narrow space along the outer peripheral edge of the base main body can be secured as the installation location of the first suspension wire, the first suspension wire can be installed at these locations. Therefore, the lens driving device can realize the miniaturization of the device.

The base member includes a base body portion having an opening through which the optical axis of the lens passes, and the base body portion has a substantially rectangular plate shape having four corners when viewed along the optical axis direction of the lens. The base main body and the Y-axis movable body are arranged side by side along the optical axis direction, and the plurality of second suspension wires are arranged side by side along the side connecting the adjacent corners to form the base main body. And the Y-axis movable body may be connected to each other. As a result, even if only a narrow space along the outer peripheral edge of the base main body can be secured as the installation location of the second suspension wire, the first suspension wire can be installed at these locations. Therefore, the lens driving device can realize the miniaturization of the device.

The lens driving device further includes a plurality of second suspension wires connecting the base member and the Y-axis movable body, the second suspension wire has conductivity, and the base member has an opening through which the optical axis of the lens passes. The base main body is provided, and the base main body is formed in a substantially rectangular plate shape having four corners when viewed along the optical axis direction of the lens, and the base main body, the X-axis movable body, and the Y are formed. The axial movable body is arranged side by side along the optical axis direction, and the plurality of first suspension wires are arranged side by side along the first side of the four sides connecting the adjacent corners to each other, and the base main body is arranged. Each of the portions and the X-axis movable body are connected, and the plurality of second suspension wires are along the first side of the four sides connecting the adjacent corners or a side different from the first side. They may be arranged side by side, and the base main body and the Y-axis movable body may be connected to each other. As a result, even if only a narrow space along the outer peripheral edge of the base main body can be secured as a place for installing the first suspension wire and the second suspension wire, the first suspension wire and the second suspension wire can be placed in these places. Installation is possible. Therefore, the lens driving device can realize the miniaturization of the device.

The base member includes a base body portion having an opening through which the optical axis of the lens passes, and the base body portion has a substantially rectangular plate shape having four corners when viewed along the optical axis direction of the lens. At least one of the first actuator and the second actuator formed may be arranged in the region between the corner and the opening when viewed along the optical axis of the lens. Since the base main body has a substantially rectangular plate shape, the base main body can easily secure a space for installing members between the corners and the openings. Therefore, in the lens driving device, at least one of the first actuator and the second actuator is installed at the corner of the base main body to secure the installation space for the first actuator and the like, and to reduce the size of the device. be able to.

At least one of the first actuator and the second actuator is arranged in the region between the corner and the opening when viewed along the optical axis direction of the lens. Since the base main body has a substantially rectangular plate shape, the base main body can easily secure a space for installing members between the corners and the openings. Therefore, in the lens driving device, at least one of the first actuator and the second actuator is installed at the corner of the base main body to secure the installation space for the first actuator and the like, and to reduce the size of the device. be able to.

The Z-axis direction and the optical axis direction of the lens are the same directions, and at least a part of the first actuator and the second actuator may overlap the lens carrier in the optical axis direction of the lens. In this case, the lens driving device can be made low in height.

The base member may include protrusions, and the movable body may be slidably in contact with the protrusions. In this case, the lens driving device can reduce the contact area between the base member and the movable body, and can suppress the frictional resistance when moving the movable body with respect to the base member.

According to one aspect of the present invention, it is possible to suppress the occurrence of crosstalk between moving members.

It is an exploded perspective view which shows the schematic structure of the lens driving device which concerns on 1st Embodiment. It is a perspective view which shows the base member of FIG. It is a top view which shows the base member of FIG. It is a perspective view which shows the circumference of the X-axis actuator support part of FIG. 2 enlarged. It is a perspective view which shows the auxiliary body of FIG. It is a perspective view which shows the state which the auxiliary body is assembled to the base member of FIG. It is sectional drawing cut along the line VII-VII of FIG. It is a perspective view which shows the movable body of FIG. It is a top view which shows the state which the auxiliary body and the movable body are assembled with the base member of FIG. It is a perspective view which shows the state which the auxiliary body and the movable body are assembled with the base member of FIG. It is sectional drawing which cut along the XI-XI line in FIG. It is a perspective view which shows the state which the auxiliary body and the movable body are assembled with the base member of FIG. 1 from another angle. It is a perspective view which shows the lens carrier of FIG. It is a top view which shows the lens carrier of FIG. FIG. 5 is a perspective view showing a state in which an auxiliary body, a movable body, and a lens carrier are assembled to the base member of FIG. It is a top view which shows the state which the auxiliary body, the movable body, and the lens carrier are assembled with the base member of FIG. It is sectional drawing which cut the lens drive device of FIG. 1 along the optical axis direction. It is an exploded perspective view which shows the schematic structure of the lens driving device which concerns on 2nd Embodiment. FIG. 8 is a perspective view of the lens driving unit of FIG. 18 as viewed from the X-axis actuator side. FIG. 19 is a side view of the lens driving portion of FIG. 19 as viewed from the X-axis movable body holding portion side. It is a perspective view which shows the structure of the base member. It is a perspective view which shows the structure of the X-axis movable body. It is a perspective view which looked at the state which combined the base member and the X-axis movable body from the X-axis movable body holding part side. It is a perspective view which looked at the state which combined the base member and the X-axis movable body from the X-axis actuator side. It is sectional drawing which cut along the XXV-XXV line of FIG. It is sectional drawing which cut along the XXVI-XXVI line of FIG. It is a top view which looked at the state which combined the base main body part and the X-axis movable body main body part from the X-axis movable body main body part side. It is a perspective view which shows the structure of the Y-axis movable body. It is a perspective view which looked at the state which combined the base member, the X-axis movable body, and the Y-axis movable body from the X-axis movable body holding part side. It is a side view which looked at the state which combined the base member, the X-axis movable body, and the Y-axis movable body from the Y-axis actuator side. It is a side view which looked at the state which combined the base member, the X-axis movable body, and the Y-axis movable body from the Y-axis movable body holding part side. It is a top view which shows the state which combined the base body part, the X-axis movable body part, and the Y-axis movable body part. It is a perspective view which shows the lens carrier. It is a perspective view which looked at the state which combined the base member, the X-axis movable body, the Y-axis movable body, and a lens carrier from the X-axis movable body holding part side. It is a top view which shows the state which combined the base main body part, the X-axis movable body part, the Y-axis movable body part, and a lens carrier. It is a top view which looked at the lens drive part from the auxiliary member side. It is sectional drawing which cut along the line XXXVII-XXXVII of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are designated by the same reference numerals, and duplicate description will be omitted.

(First Embodiment)
First, a first embodiment of the lens driving device will be described. The lens driving device 1 according to the first embodiment shown in FIG. 1 is mounted on an imaging device such as a digital camera and drives the lens 4. The lens driving device 1 includes a lens driving unit 2 and a cover 3. The lens driving device 1 has an optical axis L of a lens 4 to be attached to the lens driving unit 2.

In each figure, the XYZ Cartesian coordinate system is shown for convenience of explanation. The Z-axis direction is the L direction of the optical axis of the lens 4 to be attached. The X-axis direction is orthogonal to the L-direction of the optical axis. The Y-axis direction is orthogonal to the optical axis L direction and orthogonal to the X-axis direction.

As shown in FIG. 1, the lens driving unit 2 includes a base member 100, an auxiliary body (X-axis movable body) 200, a movable body (Y-axis movable body) 300, a lens carrier 400, and an X-axis actuator (first actuator). It includes 130, a Y-axis actuator (first actuator) 230, and a Z-axis actuator (second actuator) 330. The lens driving unit 2 further includes a frame member 500 arranged so as to cover the periphery of the lens carrier 400.

Each member such as the auxiliary body 200 is arranged on one surface of the base member 100. A lens 4 is attached to the lens carrier 400. The lens carrier 400 is moved in the X-axis direction and the Y-axis direction with respect to the base member 100 by the operation of the X-axis actuator 130 and the Y-axis actuator 230. The lens carrier 400 is moved in the Z-axis direction with respect to the base member 100 by the operation of the Z-axis actuator 330.

First, the details around the base member 100 will be described. As shown in FIGS. 2 and 3, the base member 100 includes a base body portion 110, an actuator mounting portion 111, a stopper portion 112, a first strut portion 113, a second strut portion 114, and an X-axis actuator support portion 120. I have.

The base main body 110 is formed in a substantially rectangular plate shape having four corners when viewed along the optical axis L direction. For convenience of explanation, the four sides constituting the outer peripheral edge of the base main body 110 when viewed along the optical axis L direction are referred to as side H11, side H12, side H13, and side H14, respectively. The sides H11 to H14 connect adjacent corners to each other. Sides H11 and H12 are parallel and extend along the Y-axis direction. Sides H13 and H14 are parallel and extend along the X-axis direction. When the base main body 110 is viewed along the optical axis L direction, each side is connected in the order of side H11, side H14, side H12, and side H13 to form an outer peripheral edge. The lengths of the sides H11 and H12 are shorter than the lengths of the sides H13 and H14.

The base main body 110 is provided with a circular opening 110a centered on the optical axis L (through which the optical axis L passes). When viewed along the optical axis L direction, the center position (optical axis L) of the opening 110a is eccentric with respect to the center position of the base main body 110 having a substantially rectangular plate shape. Specifically, the opening 110a is provided at a position closer to the side H12 than the side H11 when viewed along the optical axis L direction.

The X-axis actuator support portion 120 is provided on the surface of the base main body portion 110 on the side where the auxiliary body 200 is arranged. The X-axis actuator support portion 120 is provided on the surface of the base main body portion 110 in the vicinity of the corner portion where the side H11 and the side H14 are connected. The X-axis actuator support portion 120 supports the X-axis actuator 130 (X-axis drive shaft 132) from the base main body portion 110 side. As shown in FIG. 4, the X-axis actuator support portion 120 includes a first support portion 121, a second support portion 122, and a wall portion 123. In FIG. 4, the X-axis actuator 130 is omitted in order to show the details of the X-axis actuator support portion 120.

The first support portion 121 and the second support portion 122 are arranged side by side in the X-axis direction. The first support portion 121 is located on the side H11 side of the second support portion 122. A predetermined gap is provided between the first support portion 121 and the second support portion 122. The tops of the first support portion 121 and the second support portion 122 are provided with grooves 121a and 122a having a substantially U-shaped cross section extending along the X-axis direction, respectively. The wall portion 123 is provided between the first support portion 121 and the second support portion 122. The wall portion 123 connects the ends of the first support portion 121 and the second support portion 122 on the side H14 side. The base main body 110 and the X-axis actuator support 120 are integrally provided.

As shown in FIGS. 2 and 3, the X-axis actuator 130 is provided on the surface of the base main body 110 on the side where the auxiliary body 200 is arranged. The X-axis actuator 130 is provided in the vicinity of the corner portion where the side H11 and the side H14 of the base main body 110 are connected. The X-axis actuator 130 is arranged in the region between the corner portion to which the side H11 and the side H14 are connected and the opening 110a when viewed along the optical axis L direction. The X-axis actuator 130 is an actuator that constitutes 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 made of a piezoelectric material. As the piezoelectric material, lead zirconate titanate (so-called PZT), crystal, lithium niobate (LiNbO ₃ ), potassium tantalate niobate (K (Ta, Nb) O ₃ ), barium titanate (BaTIO ₃ ), Inorganic piezoelectric materials such as lithium tantalate (LiTaO ₃ ) and barium titanate (SrTIO _{3) can be used.}

The X-axis piezoelectric element 131 may have a laminated structure in which a plurality of piezoelectric layers made of the above-mentioned piezoelectric material and a plurality of electrode layers are alternately laminated. By controlling the voltage applied to the X-axis piezoelectric element 131, the expansion and contraction of the X-axis piezoelectric element 131 is controlled. The X-axis piezoelectric element 131 is not limited to a prismatic shape, but may be a columnar shape or the like as long as it has a shape that allows expansion and contraction in the X-axis direction.

The X-axis drive shaft 132 is formed in a cylindrical shape, and is arranged so that a cylindrical axis extends along the X-axis direction. The X-axis drive shaft 132 is made of a composite resin material containing fibers such as carbon fiber.

One end of the X-axis drive shaft 132 in the X-axis direction is fixed to one end of the X-axis piezoelectric element 131 in the X-axis direction. Both ends of the X-axis drive shaft 132 are housed in the groove 121a of the first support portion 121 and the groove 122a of the second support portion 122, respectively. The tip of the wall portion 123 in the rising direction supports the X-axis drive shaft 132 from the side H14 side of the base main body portion 110 when viewed along the optical axis L direction.

The weight portion 133 is fixed to the other end portion of the X-axis piezoelectric element 131 in the X-axis direction. The weight portion 133 is formed of a material having a high specific gravity such as tungsten or a tungsten alloy, and is designed to be heavier than the X-axis drive shaft 132. By making the weight portion 133 heavier than the X-axis drive shaft 132, it is possible to easily mutate the X-axis drive shaft 132 side when the X-axis piezoelectric element 131 expands and contracts.

The actuator mounting portion 111 is provided on the surface of the base main body portion 110 on the side where the auxiliary body 200 is arranged. The actuator mounting portion 111 is provided so as to stand up from the base main body portion 110 at a position on the side H12 side of the X-axis actuator support portion 120. The surface of the weight portion 133 opposite to the side to which the X-axis piezoelectric element 131 is fixed is fixed to the actuator mounting portion 111. As a result, the X-axis actuator 130 is in a state where the X-axis drive shaft 132 is supported by the X-axis actuator support portion 120 and fixed to the actuator mounting portion 111.

The X-axis actuator 130 is arranged so that the X-axis drive shaft 132 side faces the outside when viewed along the optical axis L direction. That is, the end of the X-axis actuator 130 on the X-axis drive shaft 132 side faces away from the lens carrier 400 (see FIG. 15 and the like).

For fixing the X-axis piezoelectric element 131 and the X-axis drive shaft 132, fixing the X-axis piezoelectric element 131 and the weight portion 133, and fixing the weight portion 133 and the actuator mounting portion 111, for example, an epoxy adhesive or the like is used. Adhesives are used.

The stopper portion 112, the first strut portion 113, and the second strut portion 114 are each provided on the surface of the base main body portion 110 on the side where the auxiliary body 200 is arranged. The stopper portion 112, the first strut portion 113, and the second strut portion 114 are provided so as to stand up from the surface of the base main body portion 110 on the side where the auxiliary body 200 is arranged.

The stopper portion 112 is provided in the vicinity of the side H13 of the base main body portion 110. The stopper portion 112 limits the movement range of the movable body 300 in the X-axis direction. Details of the limitation of the moving range by the stopper portion 112 will be described later.

The first strut portion 113 is provided at a corner portion where the side H12 and the side H13 are connected on the surface of the base main body portion 110. The second strut portion 114 is provided at a corner portion where the side H12 and the side H14 are connected on the surface of the base main body portion 110. The first strut portion 113 and the second strut portion 114 support the cover 3 from the inside. The actuator mounting portion 111, the stopper portion 112, the first strut portion 113, and the second strut portion 114 are provided integrally with the base main body portion 110.

Protrusions T11 to T13 are provided on the surface of the base main body 110 on the side where the auxiliary body 200 is arranged. The protrusion T11 is provided on the surface of the base main body 110 in the vicinity of the corner where the side H11 and the side H13 are connected. The protrusion T12 is provided at a position between the stopper portion 112 and the first support support portion 113 on the surface of the base main body portion 110. The protruding portion T13 is provided on the surface of the base main body portion 110 in the vicinity of the corner portion where the side H12 and the side H14 are connected. The protrusions T11 to T13 and the base main body 110 are integrally provided. The protrusions T11 to T13 may be, for example, hemispherical or may have a convex shape with a flat top.

Next, the details of the configuration of the auxiliary body 200 will be described. As shown in FIG. 5, the auxiliary body 200 is a rod-shaped member that extends along the Y-axis direction when assembled to the base member 100. The auxiliary body 200 includes an auxiliary body main body 210 and a Y-axis actuator support 220. The auxiliary body main body 210 and the Y-axis actuator support 220 are integrally provided.

The auxiliary body main body 210 is provided with an X-axis friction engaging portion 240. The X-axis friction engaging portion 240 is provided at an end portion of the auxiliary body main body portion 210 opposite to the side to which the Y-axis actuator support portion 220 is connected. The X-axis friction engaging portion 240 is provided on the outer surface of the auxiliary body main body 210 facing the X-axis actuator 130 side when the auxiliary body 200 is assembled to the base member 100. The X-axis friction engaging portion 240 is formed in a substantially V-shaped groove extending along the X-axis direction when the auxiliary body 200 is assembled to the base member 100. A substantially V-shaped metal plate 241 is attached to the X-axis friction engaging portion 240 (see FIG. 7). The X-axis friction engaging portion 240 comes into contact with the X-axis drive shaft 132 via the metal plate 241.

A first urging portion 242 is attached to the auxiliary body main body portion 210 (see FIG. 7). The first urging portion 242 is an elastic member. One end of the first urging portion 242 is fixed to the auxiliary body main body portion 210. The other end (tip) of the first urging portion 242 faces the X-axis friction engaging portion 240.

A protrusion T21 is provided on the surface of the auxiliary body main body 210 opposite to the side on which the X-axis friction engaging portion 240 is provided. The protrusion T21 is located near the end of the auxiliary body main body 210 on the side where the X-axis friction engaging portion 240 is provided. The protrusion T21 and the auxiliary body main body 210 are integrally provided. The protrusion T21 may be, for example, hemispherical or may have a convex shape with a flat top. The protrusion T21 comes into contact with the inner surface of the cover 3 when the auxiliary body 200 is lifted from the base main body 110.

The Y-axis actuator support portion 220 supports the Y-axis actuator 230 (Y-axis drive shaft 232) from the base main body portion 110 side in a state where the auxiliary body 200 is assembled to the base member 100. The Y-axis actuator support portion 220 has the same configuration as the X-axis actuator support portion 120 provided on the base member 100. Specifically, the Y-axis actuator support portion 220 includes a first support portion 221, a second support portion 222, and a wall portion 223.

The first support portion 221 and the second support portion 222 are provided so as to be arranged along the Y-axis direction when the auxiliary body 200 is assembled to the base member 100. The second support portion 222 is provided on the auxiliary body main body portion 210 side with respect to the first support portion 221. A predetermined gap is provided between the first support portion 221 and the second support portion 222. At the tops of the first support portion 221 and the second support portion 222, grooves 221a and 222a having a substantially U-shaped cross section extending along the Y-axis direction when the auxiliary body 200 is assembled to the base member 100 are provided, respectively. ing. The wall portion 223 is provided between the first support portion 221 and the second support portion 222, and connects the first support portion 221 and the second support portion 222. When the wall portion 223 is viewed along the optical axis L direction with the auxiliary body 200 assembled to the base member 100, the wall portion 223 is on the side H11 side of the base main body portion 110 in the first support portion 221 and the second support portion 222. The ends of the are connected to each other.

Next, a state in which the auxiliary body 200 is assembled to the base member 100 will be described. As shown in FIGS. 5 to 7, the auxiliary body 200 is arranged so as to be overlapped on one surface of the base member 100 in the optical axis L direction. That is, the base main body 110 and the auxiliary body 200 are arranged side by side along the optical axis L direction. The auxiliary body 200 is arranged in a region between the opening 110a and the side H11 on the surface of the base main body 110 when viewed along the optical axis L direction. The end of the auxiliary body 200 on the side where the X-axis friction engaging portion 240 is provided is located near the corner portion where the side H11 and the side H14 are connected. The end of the auxiliary body 200 on the side where the Y-axis actuator support portion 220 is provided is located near the corner portion where the side H11 and the side H13 are connected.

The X-axis friction engaging portion 240 comes into contact with the X-axis drive shaft 132 via the metal plate 241. The X-axis friction engaging portion 240 abuts on the X-axis drive shaft 132 so as to sandwich the X-axis drive shaft 132 with the X-axis actuator support portion 120. The tip of the first urging portion 242 is in contact with the X-axis drive shaft 132 at a position between the first support portion 121 and the second support portion 122. The tip of the first urging portion 242 urges the X-axis drive shaft 132 in the direction of pressing the X-axis drive shaft 132 against the X-axis friction engaging portion 240. As a result, the X-axis drive shaft 132 is sandwiched between the tip of the first urging portion 242 and the X-axis friction engaging portion 240. That is, the X-axis friction engaging portion 240 is in a state of frictionally engaging with the X-axis drive shaft 132 via the metal plate 241.

With the auxiliary body 200 assembled to the base member 100, the surface of the Y-axis actuator support portion 220 on the base main body 110 side is slidably in contact with the protrusion T11 provided on the base main body 110. (See FIG. 7). By sandwiching the X-axis drive shaft 132 between the X-axis friction engaging portion 240 and the first urging portion 242, the auxiliary body 200 is in a state of being movably supported by the base member 100 in the X-axis direction. That is, one end of the auxiliary body 200 is supported by the base member 100 via the X-axis actuator 130, and the other end is supported by the base member 100 by the protrusion T11.

With the X-axis friction engaging portion 240 frictionally engaged with the X-axis drive shaft 132, the X-axis piezoelectric element 131 expands and contracts in the X-axis direction, so that the auxiliary body 200 moves in the X-axis direction with respect to the base member 100. Can be moved. In this way, the X-axis actuator 130 connects the base member 100 and the auxiliary body 200, and moves the auxiliary body 200 with respect to the base member 100 in the X-axis direction.

As shown in FIGS. 6 and 7, the auxiliary body 200 is provided with a Y-axis actuator 230. The Y-axis actuator 230 is provided in the vicinity of the corner portion where the side H11 and the side H13 of the base main body 110 are connected when viewed along the optical axis L direction (see FIG. 9). The Y-axis actuator 230 is arranged in the region between the corner portion to which the side H11 and the side H13 are connected and the opening 110a when viewed along the optical axis L direction. The Y-axis actuator 230 is an actuator that constitutes 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 is made of a piezoelectric material. The material and shape of the Y-axis piezoelectric element 231 are the same as those of the X-axis piezoelectric element 131, and detailed description thereof will be omitted.

The Y-axis drive shaft 232 is formed in a cylindrical shape, and is arranged so that the cylindrical axis extends along the Y-axis direction. The Y-axis drive shaft 232 is made of a composite resin material containing fibers such as carbon fiber.

One end of the Y-axis drive shaft 232 in the Y-axis direction is fixed to one end of the Y-axis piezoelectric element 231 in the Y-axis direction. Both ends of the Y-axis drive shaft 232 are housed in the groove 221a of the first support portion 221 and the groove 222a of the second support portion 222, respectively. The tip of the wall portion 223 in the rising direction supports the Y-axis drive shaft 232 from the side H11 side of the base main body portion 110 when viewed along the optical axis L direction.

The weight portion 233 is fixed to the other end portion of the Y-axis piezoelectric element 231 in the Y-axis direction. The material and function of the weight portion 233 are the same as those of the weight portion 133, and detailed description thereof will be omitted.

The weight portion 233 is fixed to the surface of the auxiliary body main body 210 facing the Y-axis actuator support portion 220. As a result, the Y-axis actuator 230 is in a state of being fixed to the auxiliary body main body 210 while the Y-axis drive shaft 232 is supported by the Y-axis actuator support portion 220.

The Y-axis actuator 230 is arranged so that the Y-axis drive shaft 232 side faces the outside when viewed along the L direction of the optical axis. That is, the end of the Y-axis actuator 230 on the Y-axis drive shaft 232 side faces away from the lens carrier 400 (see FIG. 15 and the like).

As shown in FIG. 7, the optical axis L passes through the auxiliary body 200 when viewed along the X-axis direction. Further, the X-axis actuator 130 and the Y-axis actuator 230 are provided at positions facing each other across the optical axis L when viewed along the X-axis direction.

Next, the details of the configuration of the movable body 300 will be described. As shown in FIG. 8, the movable body 300 includes a movable body main body portion 310, a first side wall portion 311, a second side wall portion 312, a third side wall portion 313, a fourth side wall portion 314, a raised portion 315, and an overhanging portion. It includes 316 and a Y-axis friction engaging portion 340.

The movable body main body 310 is formed in a substantially rectangular plate shape having four corners when viewed along the optical axis L direction. For convenience of explanation, the four sides constituting the outer peripheral edge of the movable body main body 310 when viewed along the optical axis L direction are referred to as side H31, side H32, side H33, and side H34, respectively. The movable body main body 310 is provided with a circular opening 310a centered on the optical axis L (through which the optical axis L passes). The diameter of the opening 310a provided in the movable body main body 310 is smaller than the diameter of the opening 110a provided in the base member 100 (see FIG. 17).

As shown in FIGS. 8 and 9, the side H31 of the base member 100 with respect to the opening 310a when viewed along the optical axis L direction in a state where the movable body 300 is overlapped with the base member 100. It is a side located on the side H11 side. Similarly, the side H32 is a side located on the side H12 side of the base member 100 with respect to the opening 310a. The side H33 is a side located on the side H13 side of the base member 100 with respect to the opening 310a. The side H34 is a side located on the side H14 side of the base member 100 with respect to the opening 310a.

As shown in FIG. 8, the first side wall portion 311 is located on the side of the movable body main body 310 where the lens carrier 400 is arranged from the movable body main body 310 at the corner where the side H31 and the side H34 are connected. Standing up towards. The second side wall portion 312 stands up from the movable body main body 310 toward the side where the lens carrier 400 is arranged at the corner portion where the side H32 and the side H34 of the movable body main body 310 are connected. The second side wall portion 312 extends a predetermined length from the corner portion where the side H32 and the side H34 are connected toward the first side wall portion 311 side.

The third side wall portion 313 rises from the movable body main body 310 toward the side where the lens carrier 400 is arranged at the corner portion where the side H32 and the side H33 of the movable body main body 310 are connected. The fourth side wall portion 314 stands up from the movable body main body 310 toward the side where the lens carrier 400 is arranged at the corner portion where the side H33 and the side H31 of the movable body main body 310 are connected. The overhanging portion 316 is provided at the tip end portion of the fourth side wall portion 314 in the rising direction. The overhanging portion 316 projects outward from the tip end portion of the fourth side wall portion 314 (the side away from the opening 310a).

An actuator holding portion 310b that is recessed in a rectangular shape is provided on the surface of the movable body main body 310 on the side where the lens carrier 400 is arranged. The actuator holding portion 310b is located near the corner portion where the side H32 and the side H34 are connected.

The raised portion 315 is provided in the vicinity of the side H33 on the surface of the movable body main body 310 on the side where the lens carrier 400 is arranged. In the raised portion 315, the top of the raised portion extends along the X-axis direction. The raised portion 315 protrudes from the movable body main body portion 310 so that the cross section in the Y-axis direction has a substantially arc shape. A flat portion may be provided on the top of the ridge of the ridge 315.

The Y-axis friction engaging portion 340 is provided on the overhanging portion 316. The Y-axis friction engaging portion 340 is provided on the outer surface of the overhanging portion 316 that faces the Y-axis actuator 230 side when the movable body 300 is assembled to the base member 100 and the auxiliary body 200 (FIG. FIG. 10). The Y-axis friction engaging portion 340 is formed in a substantially V-shaped groove extending along the Y-axis direction when the movable body 300 is assembled to the base member 100 (see FIGS. 10 and 11 and the like). A substantially V-shaped metal plate 341 is attached to the Y-axis friction engaging portion 340. The Y-axis friction engaging portion 340 comes into contact with the Y-axis drive shaft 232 via the metal plate 341.

A second urging portion 342 is attached to the overhanging portion 316. The second urging portion 342 is an elastic member. One end of the second urging portion 342 is fixed to the overhanging portion 316. The other end (tip) of the second urging portion 342 faces the Y-axis friction engaging portion 340.

A protrusion T31 is provided on the overhanging portion 316. The protrusion T31 is provided on the surface of the overhanging portion 316 opposite to the side on which the Y-axis friction engaging portion 340 is provided. The protrusion T31 and the overhanging portion 316 are integrally provided. The protrusion T31 may be, for example, hemispherical or may have a convex shape with a flat top. The protrusion T31 comes into contact with the inner surface of the cover 3 when the movable body 300 is lifted from the base main body 110.

The side H33 of the movable body main body 310 is provided with a recess H33a that is recessed toward the opening 310a.

Next, a state in which the movable body 300 is assembled to the base member 100 and the auxiliary body 200 will be described. As shown in FIGS. 8 to 12, the movable body 300 is arranged so as to be overlapped with the base main body 110 on the same side as the auxiliary body 200. That is, the base main body 110 and the movable body 300 are arranged side by side along the optical axis L direction. The movable body 300 is stacked on the surface of the base main body 110 so that the opening 310a and the opening 110a of the base main body 110 communicate with each other when viewed along the optical axis L direction. The auxiliary body 200 and the movable body 300 are arranged on the same surface of the base main body 110 and are adjacent to each other. As shown in FIG. 9, when viewed along the optical axis L direction, the auxiliary body 200 and the movable body 300 do not overlap each other. However, the overhanging portion 316 of the movable body 300 overlaps with the auxiliary body 200 in order to engage the Y-axis friction engaging portion 340 with the Y-axis drive shaft 232.

The Y-axis friction engaging portion 340 comes into contact with the Y-axis drive shaft 232 via the metal plate 341. The Y-axis friction engaging portion 340 abuts on the Y-axis drive shaft 232 so as to sandwich the Y-axis drive shaft 232 with the Y-axis actuator support portion 220. The tip of the second urging portion 342 is in contact with the Y-axis drive shaft 232 at a position between the first support portion 221 and the second support portion 222. The tip of the second urging portion 342 urges the Y-axis drive shaft 232 in the direction of pressing the Y-axis drive shaft 232 against the Y-axis friction engaging portion 340. As a result, the Y-axis drive shaft 232 is sandwiched between the tip of the second urging portion 342 and the Y-axis friction engaging portion 340. That is, the Y-axis friction engaging portion 340 is in a state of frictionally engaging with the Y-axis drive shaft 232 via the metal plate 341.

With the movable body 300 assembled to the base member 100 and the auxiliary body 200, the surface of the movable body main body 310 on the base main body 110 side can slide on the protrusions T12 and T13 provided on the base main body 110. Is in contact with. By sandwiching the Y-axis drive shaft 232 between the Y-axis friction engaging portion 340 and the second urging portion 342, the movable body 300 is supported by the base member 100 and the auxiliary body 200 so as to be movable in the Y-axis direction. It becomes a state. That is, in the movable body 300, the side provided with the Y-axis friction engaging portion 340 is supported by the auxiliary body 200 via the Y-axis actuator 230, and the side opposite to the side provided with the X-axis friction engaging portion 240 is. It is supported by the base member 100 by the protrusions T12 and T13.

With the Y-axis friction engaging portion 340 frictionally engaged with the Y-axis drive shaft 232, the Y-axis piezoelectric element 231 expands and contracts in the Y-axis direction, so that the movable body 300 moves in the Y-axis direction with respect to the auxiliary body 200. Can be moved. In this way, the Y-axis actuator 230 connects the auxiliary body 200 and the movable body 300, and moves the movable body 300 with respect to the auxiliary body 200 in the Y-axis direction.

Since the Y-axis friction engaging portion 340 is engaged with the Y-axis drive shaft 232, the movable body 300 moves together with the auxiliary body 200 in the X-axis direction. Therefore, the auxiliary body 200 moves in the X-axis direction with respect to the base member 100, and the movable body 300 moves in the Y-axis direction with respect to the auxiliary body 200, so that the movable body 300 moves with respect to the base member 100. It moves in the X-axis direction and the Y-axis direction. That is, the auxiliary body 200 and the movable body 300 constitute a movable body that moves with respect to the base member 100. Of the movable bodies (auxiliary body 200 and movable body 300) that move with respect to the base member 100, the auxiliary body 200 moves with respect to the base member 100 in the X-axis direction. Of the movable bodies (auxiliary body 200 and movable body 300) that move with respect to the base member 100, the movable body 300 moves in the X-axis direction and the Y-axis direction with respect to the base member 100.

As shown in FIG. 9, when viewed along the optical axis L direction, a part of the stopper portion 112 is inserted in the recess H33a. The wall surface of the recess H33a and the outer surface of the stopper 112 face each other in the Y-axis direction. Further, the wall surface of the recess H33a and the outer surface of the stopper portion 112 face each other in the X-axis direction. In the side wall portion on the side H34 side of the auxiliary body main body portion 210, the portion of the X-axis actuator support portion 120 facing the second support portion 122 is referred to as the stopper portion H34a.

When the movable body 300 moves away from the stopper portion 112 along the Y-axis direction, the stopper portion H34a comes into contact with the second support portion 122. When the auxiliary body 200 moves in the direction approaching the stopper portion 112 along the Y-axis direction, the wall surface of the recess H33a comes into contact with the stopper portion 112. That is, the stopper portion 112 and the second support portion 122 function as a stopper mechanism that regulates the movement range of the auxiliary body 200 in the Y-axis direction. When the auxiliary body 200 moves along the X-axis direction, the wall surface of the recess H33a comes into contact with the stopper portion 112. That is, the stopper portion 112 functions as a stopper mechanism that regulates the movement range of the auxiliary body 200 in the X-axis direction.

The base member 100 is provided with a pressing member 150. One end of the presser member 150 is fixed to the base body 110, and the other end (tip) abuts on the top of the raised portion 315. The pressing member 150 is an elastic member. The tip portion of the pressing member 150 urges the raised portion 315 toward the base main body portion 110 side. As a result, the movable body 300 is prevented from being lifted from the base main body 110. Since the Y-axis friction engaging portion 340 is in contact with the Y-axis drive shaft 232, it is possible to prevent the end portion of the auxiliary body 200 on the Y-axis actuator support portion 220 side from being lifted from the base main body portion 110. As a result, the auxiliary body 200 and the movable body 300 are prevented from being lifted from the base main body 110.

As shown in FIGS. 9 and 10, a Z-axis actuator 330 is attached to the movable body 300. The Z-axis actuator 330 is an actuator that constitutes a smooth impact drive mechanism. The Z-axis actuator 330 is provided in the vicinity of the corner portion where the side H12 and the side H14 of the base main body 110 are connected when viewed along the optical axis L direction. The Z-axis actuator 330 is arranged in the region between the corner portion to which the side H12 and the side H14 are connected and the opening 110a when viewed along the optical axis L direction. The Z-axis 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 Z-axis direction. The Z-axis piezoelectric element 331 is made of a piezoelectric material. The material and shape of the Z-axis piezoelectric element 331 are the same as those of the X-axis piezoelectric element 131, and detailed description thereof will be omitted.

The Z-axis drive shaft 332 is formed in a cylindrical shape, and is arranged so that the cylindrical axis extends along the Z-axis direction. The Z-axis drive shaft 332 is made of a composite resin material containing fibers such as carbon fiber.

One end of the Z-axis drive shaft 332 in the Z-axis direction is fixed to one end of the Z-axis piezoelectric element 331 in the Z-axis direction. The weight portion 333 is fixed to the other end portion of the Z-axis piezoelectric element 331 in the Z-axis direction. The material and function of the weight portion 333 are the same as those of the weight portion 133, and detailed description thereof will be omitted.

The Z-axis actuator 330 is held by the movable body 300 by fitting and fixing the weight portion 333 to the actuator holding portion 310b provided on the movable body main body portion 310. The Z-axis actuator 330 faces the auxiliary body 200 via the lens carrier 400.

Next, the details of the configuration of the lens carrier 400 will be described. As shown in FIGS. 13 and 14, the lens carrier 400 includes a carrier main body portion 410, a rotation stop convex portion 420, a third urging portion 430, and a Z-axis friction engaging portion 440.

The carrier main body 410 is provided with a circular opening 410a centered on the optical axis L. The diameter of the opening 410a provided in the carrier main body 410 is smaller than the diameter of the opening 310a provided in the movable body 300 (see FIG. 17). A lens 4 can be attached to the opening 410a of the carrier main body 410. That is, the wall surface of the opening 410a serves as a lens mounting portion for mounting the lens 4 (FIG. 1). The lens 4 may be a lens unit composed of a plurality of lenses, or may be a single lens.

The rotation stop convex portion 420 projects from the outer peripheral surface of the carrier main body portion 410 along the direction orthogonal to the optical axis L.

The Z-axis friction engaging portion 440 is provided on the outer peripheral surface of the carrier main body portion 410. The Z-axis friction engaging portion 440 is provided at a position substantially opposite to the rotation stop convex portion 420 with the optical axis L interposed therebetween. The Z-axis friction engaging portion 440 is formed in a substantially V-shaped groove extending along the Z-axis direction when the lens carrier 400 is assembled to the movable body 300. A substantially V-shaped metal plate 441 is attached to the Z-axis friction engaging portion 440. The Z-axis friction engaging portion 440 comes into contact with the Z-axis drive shaft 332 via the metal plate 441.

The third urging portion 430 is attached to the outer peripheral surface of the carrier main body portion 410. The third urging portion 430 is an elastic member. One end of the third urging portion 430 is fixed to the carrier body portion 410. The other end (tip) of the third urging portion 430 faces the Z-axis friction engaging portion 440.

Next, a state in which the lens carrier 400 is assembled to the movable body 300 will be described. As shown in FIGS. 15 and 16, the lens carrier 400 is overlapped with respect to the movable body 300 on the side opposite to the side where the base member 100 is provided (the side on which the base member 100 overlaps) in the optical axis L direction. Have been placed. The lens carrier 400 is superposed on the surface of the movable body main body 310 so that the opening 410a and the opening 310a of the movable body 300 communicate with each other when viewed along the optical axis L direction.

The carrier main body 410 is surrounded by a first side wall 311, a second side wall 312, a third side wall 313, and a fourth side wall 314. As a result, the lens carrier 400 is restricted from moving in the X-axis direction and the Y-axis direction with respect to the movable body 300. The lens carrier 400 is held by the movable body 300 so as to be movable in the optical axis L direction. As shown in FIG. 16, the lens carrier 400 and the auxiliary body 200 do not overlap each other when viewed along the L direction of the optical axis. The Z-axis actuator 330 faces the auxiliary body 200 via the lens carrier 400.

The opening 110a of the base member 100 is provided at a position closer to the side H12 than the side H11. Therefore, when viewed along the optical axis L direction, the lens carrier 400 is arranged at a position closer to the end on the side H12 side than the end on the side H11 side of the base member 100. Further, the auxiliary body 200 is arranged at a position closer to the end portion on the side H11 side than the end portion on the side H12 side of the base member 100.

The rotation stop convex portion 420 is located between the first side wall portion 311 and the fourth side wall portion 314 in the Y-axis direction. Since the rotation stop convex portion 420 is located between the first side wall portion 311 and the fourth side wall portion 314, the lens carrier 400 is prevented from rotating about the optical axis L.

The Z-axis friction engaging portion 440 comes into contact with the Z-axis drive shaft 332 via the metal plate 441. The third urging portion 430 faces the auxiliary body 200 via the carrier main body portion 410. The tip of the third urging portion 430 is in contact with the Y-axis drive shaft 232. The tip of the third urging portion 430 urges the Z-axis drive shaft 332 in the direction of pressing the Z-axis drive shaft 332 against the Z-axis friction engaging portion 440. As a result, the Z-axis drive shaft 332 is sandwiched between the tip of the third urging portion 430 and the Z-axis friction engaging portion 440. That is, the Z-axis friction engaging portion 440 is in a state of frictionally engaging with the Z-axis drive shaft 332 via the metal plate 441.

With the Z-axis friction engaging portion 440 frictionally engaged with the Z-axis drive shaft 332, the Z-axis piezoelectric element 331 expands and contracts in the Z-axis direction, so that the lens carrier 400 moves in the Z-axis direction with respect to the movable body 300. Can be moved. In this way, the Z-axis actuator 330 connects the movable body 300 and the lens carrier 400, and moves the lens carrier 400 with respect to the movable body 300 in the Z-axis direction.

As shown in FIG. 15 and the like, at least a part of the X-axis actuator 130, the Y-axis actuator 230, and the Z-axis actuator 330 overlaps with the lens carrier 400 in the optical axis L direction. That is, at least a part of the X-axis actuator 130, the Y-axis actuator 230, and the Z-axis actuator 330 overlaps with the lens carrier 400 when viewed from a direction orthogonal to the optical axis L direction.

Next, the details of the frame member 500 will be described. As shown in FIG. 1, the frame member 500 has a substantially square frame shape surrounding the lens carrier 400 when viewed along the optical axis L direction. The frame member 500 is attached to the tip portions of the first side wall portion 311, the second side wall portion 312, the third side wall portion 313, and the fourth side wall portion 314 provided on the movable body 300.

A Z-axis actuator support portion 510 that supports the Z-axis drive shaft 332 of the Z-axis actuator 330 is provided on the inner peripheral surface of the frame member 500. The Z-axis actuator support portion 510 is in contact with a portion of the outer peripheral surface of the Z-axis drive shaft 332 on the side far from the optical axis L when viewed along the optical axis L direction.

Next, a state in which the cover 3 is attached to the lens driving unit 2 will be described. As shown in FIGS. 1 and 16, the cover 3 covers the base main body 110 so as to internally accommodate the components other than the base member 100 among the components constituting the lens driving unit 2. The cover 3 is provided with an opening 3a centered on the optical axis L. The tip portions of the first strut portion 113 and the second strut portion 114 provided on the base member 100 abut on the inner surface of the cover 3 to support the cover 3.

Next, the electric wiring connected to each actuator, the sensor for detecting the position of the auxiliary body 200 and the like, and the electric wiring connected to each sensor will be described. First, the electrical wiring and the sensor provided on the base member 100 will be described. As shown in FIGS. 2 and 3, the hall sensor HS1, the hall sensor HS2, the two electric wirings W11, and the two electric wirings are on the surface of the base main body 110 on the side where the movable body 300 and the like are arranged. (First power supply wiring) W12, two electric wirings (second power supply wiring) W13, four electric wirings W21, four electric wirings W22, and four electric wirings W23 are provided.

One end of each of the two electrical wirings W11 is connected to the X-axis piezoelectric element 131 of the X-axis actuator 130, and the other end extends to the side H11 of the base main body 110. The electric wiring W11 supplies electric power to the X-axis piezoelectric element 131.

The two electric wirings W12 are provided in the vicinity of the side H11 in the base main body 110, respectively. One end of each of the two electrical wirings W12 is located near the side H11 of the base main body 110, and the other end extends to the side H11 of the base main body 110.

The two electrical wirings W13 are provided in the vicinity of the corner portion where the side H12 and the side H14 of the base main body 110 are connected. One end of each of the two electrical wirings W13 is located near the side H14 of the base main body 110, and the other end extends to the side H12 of the base main body 110.

Of the four electrical wirings W23, one end of each of the three electrical wirings W23 is located near the side H14 of the base main body 110, and the other end extends to the side H12 of the base main body 110. One end of the remaining one electric wiring W23 is located near the side H14 of the base main body 110, and the other end extends to the side H11 of the base main body 110.

The Hall sensor HS1 functions as a position sensor that detects the position of the auxiliary body 200 that moves with respect to the base member 100. The Hall sensor HS1 is provided in the vicinity of the side H11 of the base main body 110. One end of each of the four electric wirings W21 is connected to the hall sensor HS1. The other ends of the four electric wirings W21 extend to the side H11 of the base main body 110, respectively.

The Hall sensor HS2 functions as a position sensor that detects the position of the movable body 300 that moves with respect to the base member 100. The Hall sensor HS2 is provided in the vicinity of the corner portion where the side H12 and the side H13 of the base main body 110 are connected. One end of each of the four electric wirings W22 is connected to the hall sensor HS2. The other ends of the four electrical wirings W22 extend to the side H12 of the base main body 110, respectively.

Wiring such as a control circuit and a drive circuit is connected to each of the electrical wirings W11 to W13 and W21 to W23 at the end positions of the base main body 110.

Next, the electrical wiring and the like provided on the auxiliary body 200 will be described. As shown in FIG. 5, the auxiliary body 200 is provided with a magnet MG1 and two electric wirings W32. The magnet MG1 is attached to the surface of the auxiliary body main body 210 facing the base main body 110. As shown in FIG. 7 and the like, the Hall sensor HS1 provided on the base member 100 and the magnet MG1 face each other in the Z-axis direction. The Hall sensor HS1 detects the position of the auxiliary body 200 with respect to the base member 100 based on the change in the magnetic field of the magnet MG1 moving together with the auxiliary body 200. The X-axis actuator 130 is feedback-controlled based on the detection result of the Hall sensor HS1.

One end of the two electric wirings W32 is connected to the Y-axis piezoelectric element 231 of the Y-axis actuator 230. The other ends of the two electric wires W32 are connected to one ends of the two suspension wires (first suspension wire) SW12, respectively. The suspension wire SW12 is an elastic member having conductivity. As shown in FIG. 6, the other ends of the two suspension wires SW12 are connected to the other ends of the electric wiring W12, respectively. As described above, the lens driving device 1 includes two suspension wires SW12 that connect the base member 100 and the auxiliary body 200. The two suspension wires SW12 are arranged side by side along the side (first side) H11 of the base main body 110. The Y-axis actuator 230 is connected to the electrical wiring W12 provided on the base member 100 via the suspension wire SW12. Electric power is supplied to the Y-axis piezoelectric element 231 via the electric wiring W12 provided in the base main body 110, the suspension wire SW12, and the electric wiring W32 provided in the auxiliary body 200.

Next, the electrical wiring and the like provided on the movable body 300 will be described. As shown in FIG. 8, the movable body 300 is provided with a magnet MG2, a hall sensor HS3, four electric wirings W33, and two electric wirings W43.

The magnet MG2 is provided at a corner portion on the third side wall portion 313 side of the movable body main body portion 310. As shown in FIG. 11 and the like, the Hall sensor HS2 provided on the base member 100 and the magnet MG2 face each other in the Z-axis direction. The Hall sensor HS2 detects the position of the movable body 300 with respect to the base member 100 based on the change in the magnetic field of the magnet MG2 that moves together with the movable body 300. The Y-axis actuator 230 is feedback-controlled based on the detection result of the Hall sensor HS2.

As shown in FIG. 8, the Hall sensor HS3 functions as a position sensor that detects the position of the lens carrier 400 that moves in the Z-axis direction with respect to the movable body 300. The Hall sensor HS3 is provided on the surface of the second side wall portion 312 on the L side of the optical axis. One end of each of the four electric wirings W33 is connected to the hall sensor HS3. The other ends of the four electric wirings W33 extend from the movable body main body 310 to the tip (top) of the second side wall 312 rising from the movable body main body 310.

As shown in FIGS. 2 and 12, one end of the four electric wires W23 provided on the base member 100 and the other end of the four electric wires W33 provided on the movable body 300 are four. They are connected by suspension wires SW23. The suspension wire SW23 is an elastic member having conductivity.

As shown in FIGS. 8 and 10, one end of each of the two electric wirings W43 is connected to the Z-axis piezoelectric element 331 of the Z-axis actuator 330, and the other end extends to the tip of the second side wall portion 312. ing.

As shown in FIGS. 2 and 12, one end of the two electric wires W13 provided on the base member 100 and the other end of the two electric wires W43 provided on the movable body 300 are two. The suspension wires (second suspension wires) SW13 are connected to each other. The suspension wire SW13 is an elastic member having conductivity. As described above, the lens driving device 1 includes two suspension wires SW13 that connect the base member 100 and the movable body 300. The two suspension wires SW13 are arranged side by side along the side H14 of the base main body 110. The Z-axis actuator 330 is connected to the electrical wiring W13 provided on the base member 100 via the suspension wire SW13. Electric power is supplied to the Z-axis piezoelectric element 331 via the electric wiring W13 provided in the base main body 110, the suspension wire SW13, and the electric wiring W43 provided in the movable body 300.

Next, the lens carrier 400 will be described. As shown in FIG. 14, the lens carrier 400 is provided with a magnet MG3. The magnet MG3 is provided at a position near the Z-axis friction engaging portion 440 on the outer peripheral surface of the carrier main body portion 410. As shown in FIG. 16 and the like, the Hall sensor HS3 provided on the second side wall portion 312 of the movable body 300 and the magnet MG3 face each other in the Y-axis direction. The Hall sensor HS3 detects the position of the lens carrier 400 with respect to the movable body 300 based on the change in the magnetic field of the magnet MG3 that moves together with the lens carrier 400. The Z-axis actuator 330 is feedback-controlled based on the detection result of the Hall sensor HS3.

As described above, according to the lens driving device 1, each member is sequentially arranged in the order of the base member 100, the X-axis actuator 130, the auxiliary body 200, the Y-axis actuator 230, the movable body 300, the Z-axis actuator 330, and the lens carrier 400. Be connected. As a result, when the X-axis actuator 130 moves the auxiliary body 200 with respect to the base member 100, the X-axis actuator 130 causes the entire member from the auxiliary body 200 to the lens carrier 400 (auxiliary body 200, Y-axis actuator 230, The movable body 300, the Z-axis actuator 330, and the lens carrier 400) are moved. When the Y-axis actuator 230 moves the movable body 300 with respect to the auxiliary body 200, the Y-axis actuator 230 causes the entire member from the movable body 300 to the lens carrier 400 (movable body 300, Z-axis actuator 330, and lens carrier). 400) is moved. When the Z-axis actuator 330 moves the lens carrier 400 with respect to the movable body 300, only the lens carrier 400 is moved by the Z-axis actuator 330. As a result, even when the X-axis actuator 130, the Y-axis actuator 230, and the Z-axis actuator 330 move each member, the movement is not hindered between the members. As a result, the lens driving device 1 can suppress the occurrence of crosstalk between moving members.

The lens driving device 1 includes two suspension wires SW12 that connect the base member 100 and the auxiliary body 200. In this case, the lens driving device 1 can supply electric power to the Y-axis actuator 230 that moves with respect to the base member 100 via the suspension wire SW12.

The lens driving device 1 includes two suspension wires SW13 that connect the base member 100 and the movable body 300. In this case, the lens driving device 1 can supply electric power to the Z-axis actuator 330 that moves with respect to the base member 100 via the suspension wire SW13.

The two suspension wires SW12 are arranged side by side along the side H11 of the base main body 110. The two suspension wires SW13 are arranged side by side along the side H14 of the base main body 110. As a result, even if only a narrow space along the outer peripheral edge of the base main body 110 can be secured as the installation location of the suspension wires SW12 and SW13, the suspension wires SW12 and SW13 can be installed at these locations. Therefore, the lens driving device 1 can realize the miniaturization of the device.

The X-axis actuator 130, the Y-axis actuator 230, and the Z-axis actuator 330 are arranged in the region between the corner portion of the base main body 110 and the opening 110a when viewed along the optical axis L direction. .. Since the base main body 110 has a substantially rectangular plate shape, the base main body 110 can easily secure a space for installing a member between the corner portion and the opening 110a. Therefore, in the lens driving device 1, by installing the X-axis actuator 130 or the like at the corner of the base main body 110, it is possible to reduce the size of the device while securing the installation space for the X-axis actuator 130 or the like. ..

At least a part of the X-axis actuator 130, the Y-axis actuator 230, and the Z-axis actuator 330 overlaps with the lens carrier 400 in the optical axis L direction. In this case, the lens driving device 1 can be reduced in height.

The auxiliary body 200 and the movable body 300 are slidably in contact with the protrusions T11 to T13 provided on the base main body 110. In this case, the lens driving device 1 can reduce the contact area between the base member 100 and the auxiliary body 200 and the movable body 300, and friction when moving the auxiliary body 200 and the movable body 300 with respect to the base member 100. Resistance can be suppressed.

(Second Embodiment)
Next, a second embodiment of the lens driving device will be described. The lens driving device 1A shown in FIGS. 18 and 19 is mounted on an imaging device such as a digital camera and drives the lens 4A. The lens driving device 1A includes a lens driving unit 2A and a cover 3A. The lens driving device 1A has an optical axis L of the lens 4A to be attached to the lens driving unit 2A.

In each figure, the XYZ Cartesian coordinate system is shown for convenience of explanation. The Z-axis direction is the optical axis L direction of the lens 4A to be attached. The X-axis direction is orthogonal to the L-direction of the optical axis. The Y-axis direction is orthogonal to the optical axis L direction and orthogonal to the X-axis direction.

As shown in FIGS. 18 to 20, the lens driving unit 2A includes a base member 1100, an X-axis movable body 1200, a Y-axis movable body 1300, and a lens carrier 1400. The base member 1100, the X-axis movable body 1200, the Y-axis movable body 1300, and the lens carrier 1400 are arranged side by side in this order along the optical axis L direction. The lens driving unit 2A further includes an auxiliary member 1500 arranged so as to cover the periphery of the lens carrier 1400.

Specifically, the X-axis movable body 1200 is arranged so as to overlap the base member 1100 in the optical axis L direction. The Y-axis movable body 1300 is arranged so as to be overlapped with respect to the X-axis movable body 1200 on the side opposite to the side where the base member 1100 is provided (the side where the base member 1100 overlaps) in the optical axis L direction. The lens carrier 1400 is arranged so as to be overlapped with respect to the Y-axis movable body 1300 on the side opposite to the side where the X-axis movable body 1200 is provided (the side on which the X-axis movable body 1200 overlaps) in the optical axis L direction.

The X-axis movable body 1200 is supported by the base member 1100 so as to be movable relative to the base member 1100 in the X-axis direction. The Y-axis movable body 1300 is supported by the X-axis movable body 1200 so as to be relatively movable in the Y-axis direction with respect to the X-axis movable body 1200. The lens carrier 1400 is supported by the Y-axis movable body 1300 so as to be movable in the optical axis L direction.

First, the details around the base member 1100 will be described. As shown in FIG. 21, the base member 1100 includes a base main body portion 1110, a first convex portion 1111, and a second convex portion 1112. The base main body portion 1110 is a substantially rectangular plate-shaped member having four corners when viewed along the optical axis L direction. For convenience of explanation, the four sides constituting the outer peripheral edge of the base main body 1110 when viewed along the optical axis L direction are referred to as side H1011, side H1012, side H1013, and side H1014, respectively. The sides H1011 to H1014 connect adjacent corners to each other. The side H1011 and the side H1012 are parallel and extend along the X-axis direction. The side H1013 and the side H1014 are parallel and extend along the Y-axis direction. When the base main body 1110 is viewed along the optical axis L direction, each side is connected in the order of side H1011, side H1014, side H1012, and side H1013 to form an outer peripheral edge.

The base main body 1110 is provided with a circular opening 1110a centered on the optical axis L (through which the optical axis L passes). The first convex portion 1111 and the second convex portion 1112 are provided on the surface of the base main body portion 1110 on the X-axis movable body 1200 side (the surface on the side on which the X-axis movable body 1200 is overlapped). The first convex portion 1111 and the second convex portion 1112 are provided on the surface of the base main body portion 1110 on the side H1012 side of the opening 1110a. The first convex portion 1111 and the second convex portion 1112 are arranged side by side in the X-axis direction. A predetermined gap is opened in the X-axis direction between the first convex portion 1111 and the second convex portion 1112. The upper surfaces (tops) of the first convex portion 1111 and the second convex portion 1112, that is, the surfaces of the first convex portion 1111 and the second convex portion 1112 on the X-axis movable body 1200 side, are substantially extended along the X-axis direction. A V-shaped groove is provided. The base main body portion 1110 and the first convex portion 1111 and the second convex portion 1112 are integrally provided.

An X-axis movable body holding portion 1120 is provided on the side H1011 side of the opening 1110a on the surface of the base main body portion 1110 on the X-axis movable body 1200 side. The X-axis movable body holding portion 1120 includes a support portion 1121 and a shaft portion 1122. The support portion 1121 is fixed to the surface of the base main body portion 1110 on the X-axis movable body 1200 side. The shaft portion 1122 is formed in a columnar shape and is arranged so as to extend along the X-axis direction. The support portion 1121 supports the central portion of the shaft portion 1122. A gap is provided between both ends of the shaft portion 1122 and the base main body portion 1110. The base main body portion 1110 and the X-axis movable body holding portion 1120 are integrally provided.

An X-axis actuator (first actuator) 1130 is provided on the side H1012 side of the opening 1110a on the surface of the base main body portion 1110 on the X-axis movable body 1200 side. The X-axis actuator 1130 and the X-axis movable body holding portion 1120 face each other with the optical axis L interposed therebetween.

The X-axis actuator 1130 is an actuator that constitutes a smooth impact drive mechanism. The X-axis actuator 1130 includes a prismatic X-axis piezoelectric element 1131, an X-axis drive shaft 1132, and a weight portion 1133.

The X-axis piezoelectric element 1131 is an element that can expand and contract in the X-axis direction. The X-axis piezoelectric element 1131 is made of a piezoelectric material. As the piezoelectric material, lead zirconate titanate (so-called PZT), crystal, lithium niobate (LiNbO ₃ ), potassium tantalate niobate (K (Ta, Nb) O ₃ ), barium titanate (BaTIO ₃ ), Inorganic piezoelectric materials such as lithium tantalate (LiTaO ₃ ) and barium titanate (SrTIO _{3) can be used.} The X-axis piezoelectric element 1131 can have a laminated structure in which a plurality of piezoelectric layers made of the above-mentioned piezoelectric material and a plurality of electrode layers are alternately laminated. By controlling the voltage applied to the X-axis piezoelectric element 1131, the expansion and contraction of the X-axis piezoelectric element 1131 can be controlled.

The X-axis piezoelectric element 1131 is not limited to a prismatic shape, but may be a cylindrical shape or the like as long as it has a shape that allows expansion and contraction in the X-axis direction.

The X-axis drive shaft 1132 is formed in a cylindrical shape, and is arranged so that the cylindrical axis extends along the X-axis direction. The X-axis drive shaft 1132 is made of a composite resin material containing fibers such as carbon fiber.

One end of the X-axis drive shaft 1132 in the X-axis direction is fixed to one end of the X-axis piezoelectric element 1131 in the X-axis direction. The surface of the X-axis drive shaft 1132 on the base main body 11110 side is supported by the first convex portion 1111 and the second convex portion 1112 provided on the base main body 1110. The X-axis drive shaft 1132 is not fixed to the first convex portion 1111 and the second convex portion 1112, and can slide along the X-axis direction with respect to the first convex portion 1111 and the second convex portion 1112. ing.

The weight portion 1133 is fixed to the other end portion of the X-axis piezoelectric element 1131 in the X-axis direction. The weight portion 1133 is formed of a material having a high specific gravity such as tungsten or a tungsten alloy, and is designed to be heavier than the X-axis drive shaft 1132. By making the weight portion 1133 heavier than the X-axis drive shaft 1132, when the X-axis piezoelectric element 1131 expands and contracts, the weight portion 1133 is less likely to be displaced, and the X-axis drive shaft 1132 can be displaced more efficiently. ..

An actuator holding portion 1110b that rises toward the X-axis movable body 1200 side is provided on the surface of the base main body portion 1110 on the X-axis movable body 1200 side. The surface of the weight portion 1133 opposite to the side to which the X-axis piezoelectric element 1131 is fixed is fixed to the actuator holding portion 1110b. As a result, the X-axis actuator 1130 is in a state in which the X-axis drive shaft 1132 is fixed to the actuator holding portion 1110b while being supported by the first convex portion 1111 and the second convex portion 1112.

An adhesive such as an epoxy adhesive is used for fixing the X-axis piezoelectric element 1131 and the X-axis drive shaft 1132, fixing the X-axis piezoelectric element 1131 and the weight portion 1133, and fixing the weight portion 1133 and the actuator holding portion 1110b. Can be used.

Next, the details of the configuration of the X-axis movable body 1200 and the details of the support configuration of the X-axis movable body 1200 by the base member 1100 will be described. As shown in FIG. 22, the X-axis movable body 1200 includes an X-axis movable body main body portion 1210, a first convex portion 1211, a second convex portion 1212, an X-axis friction engaging portion 1240, and an X-axis support portion 1250. ing.

The X-axis movable body main body 1210 is a substantially rectangular plate-shaped member having four corners when viewed along the optical axis L direction. For convenience of explanation, when viewed along the L direction of the optical axis, the four sides constituting the outer peripheral edge of the X-axis movable body main body 1210 are arranged on the side H1021, the side H1022, the side H1023, and the side H1024, respectively. (See FIG. 24). The X-axis movable body main body 1210 is provided with a circular opening 1210a centered on the optical axis L. The opening 1210a provided in the X-axis movable body main body 1210 and the opening 1110a provided in the base main body 1110 have substantially the same size.

As shown in FIGS. 21 to 24, the side H1021 has a base member 1100 with respect to the opening 1210a when the X-axis movable body 1200 is viewed along the optical axis L direction in a state of being overlapped with the base member 1100. It is a side located on the side H1011 side of. Similarly, the side H1022 is a side located on the side H1012 side of the base member 1100 with respect to the opening 1210a. The side H1023 is a side located on the side H1013 side of the base member 1100 with respect to the opening 1210a. The side H1024 is a side located on the side H1014 side of the base member 1100 with respect to the opening 1210a.

The first convex portion 1211 and the second convex portion 1212 are provided on the surface of the X-axis movable body main body 1210 on the Y-axis movable body 1300 side (the surface on the side on which the Y-axis movable body 1300 is overlapped). The first convex portion 1211 and the second convex portion 1212 are provided on the surface of the X-axis movable body main body portion 1210 on the side H1023 side of the opening 1210a. The first convex portion 1211 and the second convex portion 1212 are arranged side by side in the Y-axis direction. A predetermined gap is opened in the Y-axis direction between the first convex portion 1211 and the second convex portion 1212. The upper surfaces (tops) of the first convex portion 1211 and the second convex portion 1212, that is, the surfaces of the first convex portion 1211 and the second convex portion 1212 on the Y-axis movable body 1300 side, substantially extend along the Y-axis direction. A V-shaped groove is provided. The X-axis movable body main body portion 1210 and the first convex portion 1211 and the second convex portion 1212 are integrally provided.

On the surface of the X-axis movable body main body 1210 on the Y-axis movable body 1300 side, the Y-axis movable body holding portion 1220 is provided on the side H1024 side of the opening 1210a. The Y-axis movable body holding portion 1220 includes a support portion 1221 and a shaft portion 1222. The support portion 1221 is fixed to the surface of the X-axis movable body main body portion 1210 on the Y-axis movable body 1300 side. The shaft portion 1222 is formed in a columnar shape and is arranged so as to extend along the Y-axis direction. The support portion 1221 supports the central portion of the shaft portion 1222. A gap is provided between both ends of the shaft portion 1222 and the X-axis movable body main body portion 1210. The X-axis movable body main body portion 1210 and the Y-axis movable body holding portion 1220 are integrally provided.

The X-axis friction engaging portion 1240 is provided at an end portion on the side H1022 side of the X-axis movable body main body portion 1210. The X-axis friction engaging portion 1240 projects from the X-axis movable body main body portion 1210 in a direction away from the opening 1210a along the Y-axis direction. A substantially V-shaped groove extending along the X-axis direction is provided on the surface of the X-axis friction engaging portion 1240 on the Y-axis movable body 1300 side. Hereinafter, the surface of the X-axis friction engaging portion 1240 provided with the V-shaped groove is referred to as a V-shaped surface 1240a.

The X-axis support portion 1250 is provided at an end portion on the side H1021 side of the X-axis movable body main body portion 1210. The X-axis support portion 1250 includes an X-axis first support portion 1251 and an X-axis second support portion 1252. The X-axis first support portion 1251 is located on the side H1023 side of the X-axis second support portion 1252.

The X-axis first support portion 1251 includes a pair of plate portions 1251a and 1251b and a raised portion 1251c. The pair of plate portions 1251a and 1251b extend from the end portion of the X-axis movable body main body portion 1210 on the side H1021 side toward the side away from the opening 1210a along the Y-axis direction. A predetermined gap is provided between the plate portion 1251a and the plate portion 1251b so that the end portion of the shaft portion 1122 of the X-axis movable body holding portion 1120 can be sandwiched in the optical axis L direction. The plate portion 1251a is located closer to the base member 1100 than the plate portion 1251b. The raised portion 1251c is provided on the surface of the plate portion 1251a on the plate portion 1251b side. In the raised portion 1251c, the top of the raised portion extends along the Y-axis direction. The raised portion 1251c protrudes from the plate portion 1251a so that the cross section in the X-axis direction has a substantially arc shape.

The X-axis second support portion 1252 includes a pair of plate portions 1252a and 1252b and a raised portion 1252c. The pair of plate portions 1252a and 1252b extend from the end portion of the X-axis movable body main body portion 1210 on the side H1021 side toward the side away from the opening 1210a along the Y-axis direction. A predetermined gap is provided between the plate portion 1252a and the plate portion 1252b so that the end portion of the shaft portion 1122 of the X-axis movable body holding portion 1120 can be sandwiched in the optical axis L direction. The plate portion 1252a is located closer to the base member 1100 than the plate portion 1252b. The raised portion 1252c is provided on the surface of the plate portion 1252a on the plate portion 1252b side. In the raised portion 1252c, the top of the raised portion extends along the Y-axis direction. The raised portion 1252c protrudes from the plate portion 1252a so that the cross section in the X-axis direction has a substantially arc shape.

Next, a state in which the X-axis movable body 1200 is superposed on the base member 1100 will be described. As shown in FIGS. 23 to 26, in a state where the X-axis movable body 1200 is superposed on the base member 1100, both ends of the shaft portion 1122 of the X-axis movable body holding portion 1120 are of the X-axis support portion 1250, respectively. It is fitted between the plate portion 1251a and the plate portion 1251b, and between the plate portion 1252a and the plate portion 1252b.

Further, in the X-axis movable body main body 1210, one end is fixed to the X-axis movable body main body 1210, and the other end is in contact with the shaft portion 1122 of the X-axis movable body holding portion 1120. Is provided. The pressing member 1253 has elasticity. The pressing member 1253 lifts the X-axis movable body main body 1210 in the direction of pulling away from the base main body 1110 when the other end abuts on the shaft 1122.

As a result, the outer peripheral surface of the shaft portion 1122 of the X-axis movable body holding portion 1120 comes into contact with the raised portion 1251c of the X-axis first support portion 1251 and the raised portion 1252c of the X-axis second support portion 1252. The outer peripheral surface of the shaft portion 1122 and the raised portions 1251c and 252c are in point contact with each other. The raised portion 1251c of the X-axis first support portion 1251 and the raised portion 1252c of the X-axis second support portion 1252 abut on the outer peripheral surface of the shaft portion 1122 of the X-axis movable body holding portion 1120 so as to be movable at least in the X-axis direction. ing.

With the X-axis movable body 1200 stacked on the base member 1100, the X-axis friction engaging portion 1240 is located between the first convex portion 1111 and the second convex portion 1112 provided on the base main body portion 1110. ing. Further, the X-axis friction engaging portion 1240 is located between the X-axis drive shaft 1132 of the X-axis actuator 1130 and the base main body portion 1110.

Further, in the X-axis movable body main body 1210, a pressing member 1241 whose one end is fixed to the X-axis movable body main body 1210 and whose other end abuts on the X-axis drive shaft 1132 of the X-axis actuator 1130 is provided. It is provided. The pressing member 1241 has elasticity. The pressing member 1241 lifts the X-axis movable body main body 1210 in the direction of pulling away from the base main body 1110 when the other end abuts on the X-axis drive shaft 1132.

As a result, the V-shaped surface 1240a of the X-axis friction engaging portion 1240 is frictionally engaged with the outer peripheral surface of the X-axis drive shaft 1132 of the X-axis actuator 1130. The outer peripheral surface of the X-axis drive shaft 1132 and the V-shaped surface 1240a are in line contact with each other by two lines. Specifically, one surface forming the V-shape on the V-shaped surface 1240a and the outer peripheral surface of the X-axis drive shaft 1132 are in line contact with each other, and the other surface forming the V-shape on the V-shaped surface 1240a and the X-axis drive shaft 1132. Is in line contact with the outer peripheral surface of the.

With the X-axis friction engaging portion 1240 frictionally engaged with the X-axis drive shaft 1132 of the X-axis actuator 1130, the X-axis piezoelectric element 1131 expands and contracts in the X-axis direction, so that the X-axis movable body 1200 moves in the X-axis direction. Moved to. In this way, the X-axis actuator 1130 connects the base member 1100 and the X-axis movable body 1200, and moves the X-axis movable body 1200 with respect to the base member 1100 in the X-axis direction.

As shown in FIG. 27, the length of the X-axis friction engaging portion 1240 in the X-axis direction is the predetermined gap between the first convex portion 1111 and the second convex portion 1112 provided on the base main body portion 1110. Shorter than the length. That is, the movement of the X-axis friction engaging portion 1240 in the X-axis direction is regulated by the first convex portion 1111 and the second convex portion 1112. As described above, the first convex portion 1111 and the second convex portion 1112 provided on the base main body portion 1110 function as an X-axis stopper mechanism that regulates the movement range in the X-axis direction of the X-axis movable body 1200.

The X-axis movable body 1200 is movably held in the X-axis direction with respect to the base member 1100 at three locations, the X-axis friction engaging portion 1240, the X-axis first support portion 1251, and the X-axis second support portion 1252. Has been done. Further, since the pressing members 1241 and 253 lift the X-axis movable body main body 1210, the X-axis movable main body 1210 is in a state of floating from the base main body 1110.

As shown in FIGS. 23 and 24, a Y-axis actuator (first actuator) 1230 is provided on the side H1023 side of the opening 1210a on the surface of the X-axis movable body main body 1210 on the Y-axis movable body 1300 side. Has been done. The Y-axis actuator 1230 and the Y-axis movable body holding portion 1220 face each other with the optical axis L interposed therebetween.

The Y-axis actuator 1230 is an actuator that constitutes a smooth impact drive mechanism. The Y-axis actuator 1230 includes a prismatic Y-axis piezoelectric element 1231, a Y-axis drive shaft 1232, and a weight portion 1233. The Y-axis piezoelectric element 1231 is an element that can expand and contract in the Y-axis direction. The Y-axis piezoelectric element 1231 has the same configuration as the X-axis piezoelectric element 1131 of the X-axis actuator 1130. By controlling the voltage applied to the Y-axis piezoelectric element 1231, the expansion and contraction of the Y-axis piezoelectric element 1231 can be controlled.

The Y-axis drive shaft 1232 is formed in a cylindrical shape, and is arranged so that the cylindrical axis extends along the Y-axis direction. Like the X-axis drive shaft 1132, the Y-axis drive shaft 1232 is made of a composite resin material containing fibers such as carbon fiber.

One end of the Y-axis drive shaft 1232 in the Y-axis direction is fixed to one end of the Y-axis piezoelectric element 1231 in the Y-axis direction. The surface of the Y-axis drive shaft 1232 on the X-axis movable body main body 1210 side is supported by the first convex portion 1211 and the second convex portion 1212 provided on the X-axis movable body main body 1210. The Y-axis drive shaft 1232 is not fixed to the first convex portion 1211 and the second convex portion 1212, and can slide along the Y-axis direction with respect to the first convex portion 1211 and the second convex portion 1212. ing.

The weight portion 1233 is fixed to the other end portion of the Y-axis piezoelectric element 1231 in the Y-axis direction. The weight portion 1233, like the weight portion 1133, is designed to be heavier than the Y-axis drive shaft 1232.

A rising portion 1260 is provided on the surface of the X-axis movable body main body 1210 on the Y-axis movable body 1300 side. The rising portion 1260 rises from the corner portion where the side H1021 and the side H1023 are connected in the X-axis movable body main body portion 1210, and projects outward from the position of the rising end portion toward the outside (the side away from the opening 1210a). There is. The portion of the rising portion 1260 that overhangs outward is referred to as the overhanging portion 1260a. The surface of the weight portion 1233 opposite to the side to which the Y-axis piezoelectric element 1231 is fixed is fixed to the surface of the rising portion 1260 on the first convex portion 1211 side. As a result, the Y-axis actuator 1230 is in a state in which the Y-axis drive shaft 1232 is fixed to the rising portion 1260 while being supported by the first convex portion 1211 and the second convex portion 1212.

For fixing the Y-axis piezoelectric element 1231 and the Y-axis drive shaft 1232, fixing the Y-axis piezoelectric element 1231 and the weight portion 1233, and fixing the weight portion 1233 and the rising portion 1260, an adhesive such as an epoxy adhesive is used. Can be used.

Next, the details of the configuration of the Y-axis movable body 1300 and the details of the support configuration of the Y-axis movable body 1300 by the X-axis movable body 1200 will be described. As shown in FIG. 28, the Y-axis movable body 1300 includes a Y-axis movable body main body portion 1310, a first side wall portion 1311a, a second side wall portion 1311b, a third side wall portion 1311c, a fourth side wall portion 1311d, and a Y-axis friction section. It includes a joint portion 1340 and a Y-axis support portion 1350.

The Y-axis movable body main body 1310 is a substantially rectangular plate-shaped member having four corners when viewed along the optical axis L direction. For convenience of explanation, the four sides constituting the outer peripheral edge of the Y-axis movable body main body 1310 when viewed along the L direction of the optical axis are referred to as side H1031, side H1032, side H1033, and side H1034, respectively. The Y-axis movable body main body 1310 is provided with a circular opening 1310a centered on the optical axis L. The opening 1310a provided in the Y-axis movable body main body 1310 and the opening 1210a provided in the X-axis movable main body 1210 have substantially the same size.

As shown in FIGS. 28 and 32, the side H1031 is X with respect to the opening 1310a when the Y-axis movable body 1300 is overlaid on the X-axis movable body 1200 and viewed along the optical axis L direction. It is a side located on the side H1021 side of the shaft movable body 1200. Similarly, the side H1032 is a side located on the side H1022 side of the X-axis movable body 1200 with respect to the opening 1310a. The side H1033 is a side located on the side H1023 side of the X-axis movable body 1200 with respect to the opening 1310a. The side H1034 is a side located on the side H1024 side of the X-axis movable body 1200 with respect to the opening 1310a.

As shown in FIG. 28, the first side wall portion 1311a is directed from the Y-axis movable body main body portion 1310 toward the lens carrier 1400 side at the corner portion where the side H1031 and the side H1034 of the Y-axis movable body main body portion 1310 are connected. Is standing up. Inside the first side wall portion 1311a, a notch portion 1312 extending along the optical axis L direction is provided at a position corresponding to the rotation stop convex portion 1420 of the lens carrier 1400. The second side wall portion 1311b rises from the Y-axis movable body main body 1310 toward the lens carrier 1400 at the corner where the side H1034 and the side H1032 of the Y-axis movable main body 1310 are connected. The first side wall portion 1311a and the second side wall portion 1311b extend along the side H1034 of the Y-axis movable body main body portion 1310 and are connected to each other.

The third side wall portion 1311c rises from the Y-axis movable body main body 1310 toward the lens carrier 1400 at the corner portion where the side H1032 and the side H1033 of the Y-axis movable main body 1310 are connected. The fourth side wall portion 1311d rises from the Y-axis movable body main body 1310 toward the lens carrier 1400 at the corner where the side H1033 and the side H1031 of the Y-axis movable main body 1310 are connected.

An actuator holding portion 1310b that is recessed in a circular shape is provided on the surface of the Y-axis movable body main body 1310 on the lens carrier 1400 side. The actuator holding portion 1310b is located in the region between the third side wall portion 1311c and the opening 1310a.

As shown in FIG. 28, the Y-axis friction engaging portion 1340 is provided at the end portion of the Y-axis movable body main body portion 1310 on the side H1033 side. The Y-axis friction engaging portion 1340 projects from the Y-axis movable body main body portion 1310 in a direction away from the opening 1310a along the X-axis direction. A substantially V-shaped groove extending along the Y-axis direction is provided on the surface of the Y-axis friction engagement portion 1340 on the lens carrier 1400 side. Hereinafter, the surface of the Y-axis friction engaging portion 1340 provided with the V-shaped groove is referred to as a V-shaped surface 1340a.

As shown in FIG. 28, the Y-axis support portion 1350 is provided at the end portion of the Y-axis movable body main body portion 1310 on the side H1034 side. The Y-axis support portion 1350 includes a Y-axis first support portion 1351 and a Y-axis second support portion 1352. The Y-axis first support portion 1351 is located on the side H1031 side of the Y-axis second support portion 1352.

The Y-axis first support portion 1351 includes a pair of plate portions 1351a and 1351b and a raised portion 1351c (see FIGS. 28 and 31). The pair of plate portions 1351a and 1351b extend from the end portion of the Y-axis movable body main body portion 1310 on the side H1034 side toward the side away from the opening 1310a along the X-axis direction. A predetermined gap is provided between the plate portion 1351a and the plate portion 1351b so that the end portion of the shaft portion 1222 of the Y-axis movable body holding portion 1220 can be sandwiched in the optical axis L direction. The plate portion 1351a is located closer to the X-axis movable body 1200 than the plate portion 1351b. The raised portion 1351c is provided on the surface of the plate portion 1351a on the plate portion 1351b side. In the raised portion 1351c, the top of the raised portion extends along the X-axis direction. The raised portion 1351c protrudes from the plate portion 1351a so that the cross section in the Y-axis direction has a substantially arc shape.

The Y-axis second support portion 1352 includes a pair of plate portions 1352a and 1352b and a raised portion 1352c (see FIGS. 28 and 31). The pair of plate portions 1352a and 1352b extend from the end portion of the Y-axis movable body main body portion 1310 on the side H1034 side toward the side away from the opening 1310a along the X-axis direction. A predetermined gap is provided between the plate portion 1352a and the plate portion 1352b so that the end portion of the shaft portion 1222 of the Y-axis movable body holding portion 1220 can be sandwiched in the optical axis L direction. The plate portion 1352a is located closer to the X-axis movable body 1200 than the plate portion 1352b. The raised portion 1352c is provided on the surface of the plate portion 1352a on the plate portion 1352b side. In the raised portion 1352c, the top of the raised portion extends along the X-axis direction. The raised portion 1352c protrudes from the plate portion 1352a so that the cross section in the Y-axis direction has a substantially arc shape.

The Y-axis movable body 1300 further includes a first wiring connection portion 1321, a second wiring connection portion 1322, and a third wiring connection portion 1323. The first wiring connection portion 1321 projects outward (the side away from the opening 1310a) from a position near the tip portion in the rising direction of the first side wall portion 1311a. The second wiring connection portion 1322 projects outward (the side away from the opening 1310a) from a position near the tip portion in the rising direction of the second side wall portion 1311b. The third wiring connection portion 1323 projects outward (the side away from the opening 1310a) from a position near the tip portion in the rising direction of the third side wall portion 1311c.

Next, a state in which the Y-axis movable body 1300 is superposed on the X-axis movable body 1200 will be described. As shown in FIGS. 29 to 31, in a state where the Y-axis movable body 1300 is superposed on the X-axis movable body 1200, both ends of the shaft portion 1222 of the Y-axis movable body holding portion 1220 are Y-axis support portions, respectively. It is fitted between the plate portion 1351a and the plate portion 1351b of the 1350 and between the plate portion 1352a and the plate portion 1352b.

Further, in the Y-axis movable body main body 1310, one end is fixed to the Y-axis movable body 1310, and the other end is in contact with the shaft portion 1222 of the Y-axis movable body holding portion 1220. Is provided. The pressing member 1353 has elasticity. The pressing member 1353 lifts the Y-axis movable body main body 1310 in the direction of pulling away from the X-axis movable body main body 1210 when the other end abuts on the shaft portion 1222.

As a result, the outer peripheral surface of the shaft portion 1222 of the Y-axis movable body holding portion 1220 comes into contact with the raised portion 1351c of the Y-axis first support portion 1351 and the raised portion 1352c of the Y-axis second support portion 1352. The outer peripheral surface of the shaft portion 1222 and the raised portions 1351c and 1352c are in point contact with each other. The raised portion 1351c of the Y-axis first support portion 1351 and the raised portion 1352c of the Y-axis second support portion 1352 abut on the outer peripheral surface of the shaft portion 1222 of the Y-axis movable body holding portion 1220 so as to be movable at least in the Y-axis direction. ing.

In a state where the Y-axis movable body 1300 is superposed on the X-axis movable body 1200, the Y-axis friction engaging portion 1340 includes the first convex portion 1211 and the second convex portion 1212 provided on the X-axis movable body main body portion 1210. It is located between. Further, the Y-axis friction engaging portion 1340 is located between the Y-axis drive shaft 1232 of the Y-axis actuator 1230 and the X-axis movable body main body portion 1210.

Further, one end of the Y-axis movable body main body 1310 is fixed to a third side wall portion 1311c rising from the Y-axis movable body main body 1310, and the other end is the Y-axis drive shaft 1232 of the Y-axis actuator 1230. A pressing member 1341 that comes into contact with the is provided. The pressing member 1341 has elasticity. The pressing member 1341 lifts the Y-axis movable body main body 1310 in the direction of pulling away from the X-axis movable body main body 1210 when the other end abuts on the Y-axis drive shaft 1232.

As a result, the V-shaped surface 1340a of the Y-axis friction engaging portion 1340 is frictionally engaged with the outer peripheral surface of the Y-axis drive shaft 1232 of the Y-axis actuator 1230. The outer peripheral surface of the Y-axis drive shaft 1232 and the V-shaped surface 1340a are in line contact with each other by two lines. Specifically, one surface forming the V-shape on the V-shaped surface 1340a and the outer peripheral surface of the Y-axis drive shaft 1232 are in line contact with each other, and the other surface forming the V-shape on the V-shaped surface 1340a and the Y-axis drive shaft 1232. Is in line contact with the outer peripheral surface of the.

With the Y-axis friction engaging portion 1340 frictionally engaged with the Y-axis drive shaft 1232 of the Y-axis actuator 1230, the Y-axis piezoelectric element 1231 expands and contracts in the Y-axis direction, so that the Y-axis movable body 1300 moves in the Y-axis direction. Moved to. In this way, the Y-axis actuator 1230 connects the X-axis movable body 1200 and the Y-axis movable body 1300, and moves the Y-axis movable body 1300 with respect to the X-axis movable body 1200 in the Y-axis direction. That is, the X-axis movable body 1200 and the Y-axis movable body 1300 constitute a movable body that moves with respect to the base member 1100. Of the movable bodies (X-axis movable body 1200 and Y-axis movable body 1300) that move with respect to the base member 1100, the X-axis movable body 1200 moves in the X-axis direction with respect to the base member 1100. Of the movable bodies (X-axis movable body 1200 and Y-axis movable body 1300) that move with respect to the base member 1100, the Y-axis movable body 1300 moves in the X-axis direction and the Y-axis direction with respect to the base member 1100.

As shown in FIG. 32, the length of the Y-axis friction engaging portion 1340 in the Y-axis direction is determined between the first convex portion 1211 and the second convex portion 1212 provided on the X-axis movable body main body portion 1210. Shorter than the length of the gap. That is, the movement of the Y-axis friction engaging portion 1340 in the Y-axis direction is regulated by the first convex portion 1211 and the second convex portion 1212. As described above, the first convex portion 1211 and the second convex portion 1212 provided on the X-axis movable body main body portion 1210 function as a Y-axis stopper mechanism that regulates the movement range in the Y-axis direction of the Y-axis movable body 1300. ..

The Y-axis movable body 1300 can move in the Y-axis direction with respect to the X-axis movable body 1200 at three locations, the Y-axis friction engaging portion 1340, the Y-axis first support portion 1351, and the Y-axis second support portion 1352. It is held in. Since the pressing members 1341 and 353 lift the Y-axis movable body main body 1310, the Y-axis movable body 1310 is in a state of floating from the X-axis movable body main body 1210.

As shown in FIG. 29, a Z-axis actuator (second actuator) 1330 is provided on the surface of the Y-axis movable body main body 1310 on the lens carrier 1400 side. The Z-axis actuator 1330 is held by the actuator holding portion 1310b provided on the Y-axis movable body main body portion 1310. The Z-axis actuator 1330 and the notch 1312 of the Y-axis movable body 1300 face each other with the optical axis L interposed therebetween.

The Z-axis actuator 1330 is an actuator that constitutes a smooth impact drive mechanism. The Z-axis actuator 1330 includes a prismatic Z-axis piezoelectric element 1331, a Z-axis drive shaft 1332, and a weight portion 1333. The Z-axis piezoelectric element 1331 is an element that can expand and contract in the optical axis L direction. The Z-axis piezoelectric element 1331 has the same configuration as the X-axis piezoelectric element 1131 of the X-axis actuator 1130. By controlling the voltage applied to the Z-axis piezoelectric element 1331, the expansion and contraction of the Z-axis piezoelectric element 1331 can be controlled.

The Z-axis drive shaft 1332 is formed in a cylindrical shape, and is arranged so that a cylindrical axis extends along the optical axis L direction. Like the X-axis drive shaft 1132, the Z-axis drive shaft 1332 is made of a composite resin material containing fibers such as carbon fiber. One end of the Z-axis drive shaft 1332 in the optical axis L direction is fixed to one end of the Z-axis piezoelectric element 1331 in the optical axis L direction.

The weight portion 1333 is fixed to the other end of the Z-axis piezoelectric element 1331 in the optical axis L direction. The weight portion 1333, like the weight portion 1133, is designed to be heavier than the Z-axis drive shaft 1332. The Z-axis actuator 1330 is held by the Y-axis movable body 1300 by fitting and fixing the weight portion 1333 to the actuator holding portion 1310b provided in the Y-axis movable body main body 1310.

For fixing the Z-axis piezoelectric element 1331 and the Z-axis drive shaft 1332, fixing the Z-axis piezoelectric element 1331 and the weight portion 1333, and fixing the weight portion 1333 and the actuator holding portion 1310b, an adhesive such as an epoxy adhesive is used. Can be used.

Next, the details of the configuration of the lens carrier 1400 and the details of the support configuration of the lens carrier 1400 by the Y-axis movable body 1300 will be described. As shown in FIG. 33, the lens carrier 1400 includes a carrier main body portion 1410, a rotation stop convex portion 1420, an engaging portion 1430, and a carrier convex portion 1440.

As shown in FIGS. 33 to 35, the lens carrier 1400 has a first side wall portion 1311a, a second side wall portion 1311b, a third side wall portion 1311c, and a third side wall portion 1311c on the Y-axis movable body main body portion 1310 of the Y-axis movable body 1300. 4 Arranged so as to be surrounded by the side wall portion 1311d. The carrier main body 1410 is provided with a circular opening 1410a centered on the optical axis L. The opening 1410a provided in the carrier main body 1410 and the opening 1310a provided in the Y-axis movable body 1310 have substantially the same size. A lens 4A is attached to the opening 1410a of the carrier main body 1410. That is, the wall surface of the opening 1410a serves as a lens mounting portion 1410b for mounting the lens 4A. By providing the lens mounting portion 1410b on the carrier main body portion 1410 in this way, the lens carrier 1400 can hold the lens 4A. The lens 4A may be a lens unit composed of a plurality of lenses, or may be a single lens.

The rotation stop convex portion 1420 projects from the outer peripheral surface of the carrier main body portion 1410 along the direction orthogonal to the optical axis L. Further, the rotation stop convex portion 1420 extends along the optical axis L on the outer peripheral surface of the carrier main body portion 1410. The rotation stop convex portion 1420 fits into the notch portion 1312 of the Y-axis movable body 1300 described above. The shape and dimensions of the detent convex portion 1420 are almost the same as the shape and dimensions of the notch portion 1312, but the notch portion 1312 is slightly larger, and the detent convex portion 1420 is fitted into the notch portion 1312. Can be done. The rotation of the lens carrier 1400 around the optical axis L is suppressed by the fitting of the rotation stop convex portion 1420 of the lens carrier 1400 and the notch portion 1312 of the Y-axis movable body 1300.

The engaging portion 1430 is a member that engages with the Z-axis drive shaft 1332 of the Z-axis actuator 1330. The engaging portion 1430 is an elastic metal member, and is attached to the outer peripheral surface of the carrier main body portion 1410. The engaging portion 1430 and the rotating stop convex portion 1420 are substantially opposed to each other with the optical axis L interposed therebetween.

The engaging portion 1430 includes a Z-axis friction engaging portion 1431 that frictionally engages with the Z-axis drive shaft 1332, and a pressing member 1432. The Z-axis friction engaging portion 1431 is formed in a substantially V shape. In the Z-axis friction engaging portion 1431, a substantially V-shaped inner surface surface (first inner surface surface 1431a, second inner surface surface 1431b) is in contact with the outer peripheral surface of the Z-axis drive shaft 1332. More specifically, the Z-axis friction engaging portion 1431 (first inner side surface 1431a, second inner side surface 1431b) is in contact with a portion on the outer peripheral surface of the Z-axis drive shaft 1332 on the optical axis L side. The pressing member 1432 sandwiches the Z-axis drive shaft 1332 with the Z-axis friction engaging portion 1431. The pressing member 1432 has elasticity. The Z-axis friction engaging portion 1431 is urged toward the Z-axis drive shaft 1332 by the elasticity of the pressing member 1432, so that the Z-axis friction engaging portion 1431 is frictionally engaged with the Z-axis drive shaft 1332.

The lens carrier 1400 is formed by expanding and contracting the Z-axis piezoelectric element 1331 in the optical axis L direction while the Z-axis friction engaging portion 1431 of the engaging portion 1430 is frictionally engaged with the Z-axis drive shaft 1332 of the Z-axis actuator 1330. Is moved in the L direction of the optical axis. In this way, the Z-axis actuator 1330 connects the Y-axis movable body 1300 and the lens carrier 1400, and moves the lens carrier 1400 with respect to the Y-axis movable body 1300 in the Z-axis direction.

The carrier convex portion 1440 is provided on the outer peripheral surface of the carrier main body portion 1410, and projects from the outer peripheral surface of the carrier main body portion 1410 along the direction orthogonal to the optical axis L. The carrier convex portion 1440 is provided on the outer peripheral surface of the carrier main body portion 1410 in the vicinity of the engaging portion 1430.

As shown in FIG. 34 and the like, at least a part of the Z-axis actuator 1330 overlaps with the lens carrier 1400 in the optical axis L direction. That is, at least a part of the Z-axis actuator 1330 overlaps with the lens carrier 1400 when viewed from a direction orthogonal to the optical axis L direction.

As shown in FIG. 36, the auxiliary member 1500 has a substantially square frame shape surrounding the lens carrier 1400 when viewed along the optical axis L direction. The auxiliary member 1500 is attached to the Y-axis movable body 1300.

For convenience of explanation, the four sides constituting the outer peripheral edge of the auxiliary member 1500 when viewed along the optical axis L direction are referred to as side H1051, side H1052, side H1053, and side H1054, respectively. As shown in FIGS. 36 and 32, the side H1051 is movable with respect to the optical axis L when viewed along the optical axis L direction in a state where the auxiliary member 1500 is superposed on the Y-axis movable body 1300. It is a side located on the side H1031 side of the body 1300. Similarly, the side H1052 is a side located on the side H1032 side of the Y-axis movable body 1300 with respect to the optical axis L. The side H1053 is a side located on the side H1033 side of the Y-axis movable body 1300 with respect to the optical axis L. The side H1054 is a side located on the side H1034 side of the Y-axis movable body 1300 with respect to the optical axis L.

Further, the corner portion formed by connecting the side H1051 and the side H1054 is referred to as a corner portion K1. Similarly, the corner portion formed by connecting the side H1054 and the side H1052 is referred to as a corner portion K2. The corner portion formed by connecting the side H1052 and the side H1053 is referred to as a corner portion K3. The corner portion formed by connecting the side H1053 and the side H1051 is referred to as a corner portion K4.

The corner portion K1 of the auxiliary member 1500 is supported (fixed) to the first side wall portion 1311a of the Y-axis movable body 1300. The corner portion K2 is supported (fixed) to the second side wall portion 1311b of the Y-axis movable body 1300. The corner portion K3 is supported (fixed) to the third side wall portion 1311c of the Y-axis movable body 1300. The corner portion K4 is supported (fixed) to the fourth side wall portion 1311d of the Y-axis movable body 1300.

The auxiliary member 1500 supports the Z-axis drive shaft 1332 of the Z-axis actuator 1330 so as to be movable in the optical axis L direction. The auxiliary member 1500 supports the Z-axis actuator 1330 by contacting the outer peripheral surface of the Z-axis drive shaft 1332 at at least two points. More specifically, when viewed along the optical axis L direction, the Z-axis actuator 1330 is located inside the corner portion K3 within the frame of the auxiliary member 1500. The auxiliary member 1500 supports the Z-axis actuator 1330 by abutting the inner surface of the corner portion K3 on the outer peripheral surface of the Z-axis drive shaft 1332. When viewed along the L direction of the optical axis, the Z-axis drive shaft 1332 is sandwiched between the inner surface of the corner portion K3 and the Z-axis friction engaging portion 1431 of the engaging portion 1430.

In the present embodiment, the support convex portion 1510 is provided on the inner portion of the side H1053. When viewed along the optical axis L, the Z-axis drive shaft 1332 is located between the support convex portion 1510 and the side H1052. The Z-axis drive shaft 1332 is supported on the side H1053 at two locations, a portion on the side H1052 side of the support convex portion 1510 and a portion of the support convex portion 1510 facing the side H1052 side. Further, the Z-axis drive shaft 1332 is supported at one position on the side H1052 near the end on the side to which the side H1053 is connected. As a result, the Z-axis drive shaft 1332 is supported at a total of three locations at the corners K3.

As shown in FIG. 37, a step portion 1520 is provided inside the side H1052 of the auxiliary member 1500. The step portion 1520 is formed by projecting an end portion on the side H1052 opposite to the Y-axis movable body main body portion 1310 side toward the optical axis L side. The surface of the step portion 1520 facing the Y-axis movable body 1300 side is referred to as an auxiliary member side contact portion 1521. The auxiliary member side contact portion 1521 overlaps a part of the carrier convex portion 1440 when viewed along the optical axis L direction. The surface of the carrier convex portion 1440 facing the auxiliary member side contact portion 1521 is referred to as the carrier side contact portion 1441. That is, the carrier-side contact portion 1441 is a surface of the carrier convex portion 1440 opposite to the surface of the Y-axis movable body main body portion 1310 side.

In this way, the auxiliary member-side contact portion 1521 of the auxiliary member 1500 and the carrier-side contact portion 1441 of the lens carrier 1400 face each other in the optical axis L direction. As a result, when the lens carrier 1400 moves to a position separated by a predetermined distance in the optical axis L direction with respect to the Y-axis movable body 1300, the auxiliary member side contact portion 1521 and the carrier side contact portion 1441 come into contact with each other. The movement of the lens carrier 1400 in the L direction of the optical axis is restricted. As described above, the auxiliary member-side contact portion 1521 and the carrier-side contact portion 1441 function as a carrier stopper mechanism that limits the movement of the lens carrier 1400 in the optical axis L direction.

As shown in FIG. 36, the auxiliary member side contact portion 1521 (step portion 1520) and the carrier side contact portion 1441 (carrier convex portion 1440) constituting the carrier stopper mechanism are formed on the Z axis of the corner portions of the auxiliary member 1500. It is provided at the corner K3 where the actuator 1330 is arranged.

Next, the electric wiring connected to each actuator, the sensor for detecting the position of the X-axis movable body 1200 and the like, and the electric wiring connected to each sensor will be described. First, the electrical wiring and the sensor provided in the base member 1100 will be described. As shown in FIG. 21, a hall sensor HS1001001, a hall sensor HS1002, and electrical wirings W1101 to W1118 are provided on the surface of the base main body 1110 on the side on which the X-axis movable body 1200 is overlapped.

The Hall sensor HS1001 functions as a position sensor that detects the position of the X-axis movable body 1200 that moves in the X-axis direction with respect to the base member 1100. The Hall sensor HS1001 is provided in the base main body portion 1110 on the side H1013 side of the opening 1110a. One end side of the electrical wirings W1101 to W1104 is connected to the hall sensor HS1001. The other end of the electrical wirings W1101 to W1104 extends to the side H1013 of the base body 1110.

One end side of the electric wirings W1105 and W1106 is connected to the X-axis piezoelectric element 1131 of the X-axis actuator 1130, and the other end side extends to the side H1013 of the base main body portion 1110. The electrical wirings W1105 and W1106 supply electric power to the X-axis piezoelectric element 1131.

Concave connection points P1031 and P1032 are provided at the corners of the base body 1110 where the sides H1013 and the sides H1012 are connected. One end side of the electrical wiring W1107 and W1108 extends to the connection points P1031 and P1032, respectively, and the other end side extends to the side H1013 of the base main body 1110. Concave connection points P1041 and P1042 are provided at the corners of the base main body 1110 where the sides H1013 and the sides H1011 are connected. One end side of the electrical wiring W1109 and W1110 extends to the connection points P1041 and P1042, respectively, and the other end side extends to the side H1013 of the base main body portion 1110.

The Hall sensor HS1002 functions as a position sensor that detects the position of the Y-axis movable body 1300 that moves in the Y-axis direction with respect to the base member 1100. The Hall sensor HS1002 is provided at a position near the corner portion where the side H1011 and the side H1014 are connected in the base main body portion 1110. The Hall sensor HS1002 is provided on a raised portion 1110c that is raised toward the Y-axis movable body 1300 side in the base main body portion 1110. One end side of the electrical wirings W1111 to W1114 is connected to the hall sensor HS1002. The other end of the electrical wirings W1111 to W1114 extends to the side H1014 of the base body 1110.

As shown in FIG. 23, the X-axis movable body main body 1210 of the X-axis movable body 1200 is a hall sensor when viewed along the optical axis L direction so as not to interfere with the hall sensor HS1002 and the raised portion 1110c. The shape avoids the HS1002 and the raised portion 1110c.

As shown in FIG. 21, concave connection points P1011 and P1012 are provided at the corners where the sides H1011 and the sides H1014 are connected in the base main body 1110. One end side of the electrical wiring W1115 and W1116 extends to the connection points P1011 and P1012, respectively, and the other end side extends to the side H1014 of the base main body 1110. Concave connection points P1021 and P1022 are provided at the corners of the base main body 1110 where the sides H1012 and the sides H1014 are connected. One end side of the electrical wiring W1117 and W1118 extends to the connection points P1021 and P1022, respectively, and the other end side extends to the side H1014 of the base main body 1110.

The edge of the opening of the connection point P1011 is formed in a substantially tapered shape whose diameter decreases toward the concave bottom side. The edges of the openings of the connection points P1012, P1021, P1022, P1031, P1032, P1041 and P1042 are also formed in a substantially tapered shape, similarly to the edges of the openings of the connection point P1011.

Next, the electrical wiring and the like provided on the X-axis movable body 1200 will be described. As shown in FIG. 23, the X-axis movable body 1200 is provided with magnets MG1001, electrical wirings W1201 and W1202. The magnet MG1001 is mounted in a recess provided at a position between the first convex portion 1211 and the second convex portion 1212 on the surface of the X-axis movable body main body 1210 on the side on which the Y-axis movable body 1300 is overlapped. ing. The Hall sensor HS1001 provided on the base member 1100 and the magnet MG1001 overlap in position in the L direction of the optical axis. The Hall sensor HS1001 detects the position of the X-axis movable body 1200 with respect to the base member 1100 based on the change in the magnetic field of the magnet MG1001 that moves together with the X-axis movable body main body 1210. The X-axis actuator 1130 is feedback-controlled based on the detection result of the Hall sensor HS1001.

Connection points Q1041 and Q1042 are provided on the surface of the rising portion 1260 on the overhanging portion 1260a on the Y-axis movable body 1300 side. The connection points Q1041 and Q1042 have a hole shape that penetrates the overhanging portion 1260a in the L direction of the optical axis. The edges of the openings on the Y-axis movable body 1300 side at the connection points Q1041 and Q1042 are formed in a substantially tapered shape in which the diameter decreases toward the openings on the base member 1100 side.

When the X-axis movable body 1200 is located at the X-axis reference position with respect to the base member 1100 and viewed along the optical axis L, the connection points Q1041 and Q1042 are provided on the base main body portion 1110. The positions coincide with the connection points P1041 and P1042, respectively. The X-axis reference position is a position (initial position) before the X-axis movable body 1200 is moved in the X-axis direction with respect to the base member 1100. As an example, it is the position of the X-axis movable body 1200 when the X-axis friction engaging portion 1240 of the X-axis movable body 1200 is located between the first convex portion 1111 and the second convex portion 1112 of the base member 1100.

One end side of the electrical wiring W1201 and W1202 is connected to the Y-axis piezoelectric element 1231 of the Y-axis actuator 1230, and the other end side extends to the connection points Q1041 and Q1042 provided in the overhanging portion 1260a, respectively. The electrical wirings W1201 and W1202 supply electric power to the Y-axis piezoelectric element 1231.

The electrical wiring W1201 provided on the rising portion 1260 of the X-axis movable body 1200 and the electrical wiring (first power supply wiring) W1109 provided on the base member 1100 are conductive suspension wires (first suspension wire). It is connected by SW1041. The electric wiring W1202 provided on the rising portion 1260 and the electric wiring (first power supply wiring) W1110 provided on the base member 1100 are connected by a conductive suspension wire (first suspension wire) SW1042. .. As described above, the lens driving device 1A includes two suspension wires SW1041 and SW1042 that connect the base member 1100 and the X-axis movable body 1200. The Y-axis actuator 1230 is connected to the electrical wirings W1109 and W1110 provided on the base member 1100 via suspension wires SW1041 and SW1042, respectively.

Specifically, one end of the suspension wire SW1041 is inserted into the connection point P1041 and the other end is passed through the connection point Q1041. The suspension wire SW1041 and the electrical wiring W1109 are connected to each other at the connection point P1041 by solder, conductive paste, or the like. Since the edge of the opening of the connection point P1041 is formed in a tapered shape, solder or conductive paste or the like can be easily poured into the connection point P1041, and the suspension wire SW1041 and the electric wiring W1109 can be easily connected. Further, the suspension wire SW1041 can be easily mounted. Also in the connection between another connection point such as the connection point P1042 and another suspension wire such as the suspension wire SW1042, the edge of the opening of the connection point is formed in a tapered shape, so that it is the same as in the case of the connection point P1041. Play the effect of. The suspension wire SW1041 and the electrical wiring W1201 are connected to each other at the connection point Q1041 by solder, conductive paste, or the like.

One end of the suspension wire SW1042 is inserted into the connection point P1042, and the other end is passed through the connection point Q1042. The suspension wire SW1042 and the electrical wiring W1110 are connected to each other at the connection point P1042 by solder, conductive paste, or the like. The suspension wire SW1042 and the electrical wiring W1202 are connected to each other at the connection point Q1042 by solder, conductive paste, or the like.

Here, as shown in FIG. 29, the overhanging portion 1260a is located closer to the lens carrier 1400 in the optical axis L direction than the surface of the Y-axis movable body main body 1310 on the X-axis movable body 1200 side. That is, the connection positions of the electrical wirings W1201 and W1202 provided on the overhanging portion 1260a and the suspension wires SW1041 and SW1042 are located on the optical axis of the Y-axis movable body main body 1310 with respect to the surface on the X-axis movable body 1200 side. It is located on the lens carrier 1400 side in the L direction. By providing a rising portion 1260 on the X-axis movable body 1200 and connecting one end of the suspension wires SW1041 and SW1042, the connection position between the electrical wirings W1201 and W1202 on the X-axis movable body 1200 side and the suspension wires SW1041 and SW1042 is set as a base member. It can be separated from 1100 (far away).

Next, the electrical wiring and the like provided on the Y-axis movable body 1300 will be described. As shown in FIGS. 19 and 29, the Y-axis movable body 1300 is provided with a hall sensor HS1003, a magnet MG1002, and electrical wirings W1301 to W1306. The magnet MG1002 is provided at a corner portion of the Y-axis movable body main body portion 1310 where the first side wall portion 1311a rises. The Hall sensor HS1002 provided on the base member 1100 and the magnet MG1002 overlap in position in the L direction of the optical axis. The Hall sensor HS1002 detects the position of the Y-axis movable body 1300 with respect to the base member 1100 based on the change in the magnetic field of the magnet MG1002 that moves together with the Y-axis movable body main body 1310. The Y-axis actuator 1230 is feedback-controlled based on the detection result of the Hall sensor HS1002.

Connection points Q1011 and Q1012 are provided on the surface of the first wiring connection portion 1321 on the side of the auxiliary member 1500. The connection points Q1011 and Q1012 have a hole shape that penetrates the first wiring connection portion 1321 in the optical axis L direction. The edges of the openings on the auxiliary member 1500 side at the connection points Q1011 and Q1012 are formed in a substantially tapered shape in which the diameter decreases toward the openings on the base member 1100 side.

Connection points Q1021 and Q1022 are provided on the surface of the second wiring connection portion 1322 on the auxiliary member 1500 side. The connection points Q1021 and Q1022 have a hole shape that penetrates the second wiring connection portion 1322 in the optical axis L direction. The edges of the openings on the auxiliary member 1500 side at the connection points Q1021 and Q1022 are formed in a substantially tapered shape in which the diameter decreases toward the openings on the base member 1100 side.

Connection points Q1031 and Q1032 are provided on the surface of the third wiring connection portion 1323 on the side of the auxiliary member 1500. The connection points Q1031 and Q1032 have a hole shape that penetrates the third wiring connection portion 1323 in the optical axis L direction. The edges of the openings on the auxiliary member 1500 side at the connection points Q1031 and Q1032 are formed in a substantially tapered shape in which the diameter decreases toward the openings on the base member 1100 side.

Along the optical axis L in a state where the Y-axis movable body 1300 is located at the Y-axis reference position with respect to the base member 1100 and the X-axis movable body 1200 is located at the X-axis reference position with respect to the base member 1100. When viewed, the connection points Q1011 and Q1012 are in the same positions as the connection points P1011 and P1012 provided on the base main body 1110, respectively. Similarly, the connection points Q1021 and Q1022 are in the same positions as the connection points P1021 and P1022 provided in the base main body 1110, respectively. The positions of the connection points Q1031 and Q1032 coincide with those of the connection points P1031 and P1032 provided in the base main body 1110, respectively.

The Y-axis reference position is a position (initial position) before the X-axis movable body 1200 is located at the X-axis reference position and the Y-axis movable body 1300 is moved in the Y-axis direction with respect to the base member 1100. ). As an example, the X-axis movable body 1200 is located at the X-axis reference position, and the Y-axis friction engaging portion 1340 of the Y-axis movable body 1300 is the first convex portion 1211 and the second convex portion 1212 of the X-axis movable body 1200. It is the position of the Y-axis movable body 1300 when it is located in the middle of.

The Hall sensor HS1003 functions as a position sensor that detects the position of the lens carrier 1400 that moves in the L direction of the optical axis with respect to the Y-axis movable body 1300. The Hall sensor HS1003 is provided on the surface of the second side wall portion 1311b on the opening 1310a side. One end side of the electrical wirings W1301 to W1304 is connected to the hall sensor HS1003. The other ends of the electrical wiring (second electrical wiring) W1301 and W1302 extend to the connection points Q1011 and Q1012 provided in the first wiring connection portion 1321, respectively. The other ends of the electrical wiring (first electrical wiring) W1303 and W1304 extend to the connection points Q1021 and Q1022 provided in the second wiring connection portion 1322, respectively (see FIG. 19).

One end side of the electrical wiring W1305 and W1306 is connected to the Z-axis piezoelectric element 1331 of the Z-axis actuator 1330, and the other end side extends to the connection points Q1031 and Q1032 provided in the third wiring connection portion 1323, respectively. The electrical wirings W1305 and W1306 supply power to the Z-axis piezoelectric element 1331.

The electric wiring W1301 provided in the first wiring connection portion 1321 of the Y-axis movable body 1300 and the electric wiring W1115 provided in the base member 1100 are connected by a suspension wire SW1011 having conductivity. The electric wiring W1302 provided in the first wiring connection portion 1321 and the electric wiring W1116 provided in the base member 1100 are connected by a conductive suspension wire SW1012.

Specifically, one end of the suspension wire SW1011 is inserted into the connection point P1011 and the other end is passed through the connection point Q1011. The suspension wire SW1011 and the electrical wiring W1115 are connected to each other at the connection point P1011 by solder, conductive paste, or the like. The suspension wire SW1011 and the electrical wiring W1301 are connected to each other at the connection point Q1011 by solder, conductive paste, or the like. Further, one end of the suspension wire SW1012 is inserted into the connection point P1012, and the other end is passed through the connection point Q1012. The suspension wire SW1012 and the electrical wiring W1116 are connected to each other at the connection point P1012 by solder, conductive paste, or the like. The suspension wire SW1012 and the electrical wiring W1302 are connected to each other at the connection point Q1012 by solder, conductive paste, or the like.

The electric wiring W1303 provided in the second wiring connection portion 1322 of the Y-axis movable body 1300 and the electric wiring W1117 provided in the base member 1100 are connected by a conductive suspension wire SW1021 (see FIG. 19). ). The electric wiring W1304 provided in the second wiring connection portion 1322 and the electric wiring W1118 provided in the base member 1100 are connected by a conductive suspension wire SW1022.

Specifically, one end of the suspension wire SW1021 is inserted into the connection point P1021 and the other end is passed through the connection point Q1021. The suspension wire SW1021 and the electrical wiring W1117 are connected to each other at the connection point P1021 by solder, conductive paste, or the like. The suspension wire SW1021 and the electrical wiring W1303 are connected to each other at the connection point Q1021 by solder, conductive paste, or the like. Further, one end of the suspension wire SW1022 is inserted into the connection point P1022, and the other end is passed through the connection point Q1022. The suspension wire SW1022 and the electrical wiring W1118 are connected to each other at the connection point P1022 by solder, conductive paste, or the like. The suspension wire SW1022 and the electrical wiring W1304 are connected to each other at the connection point Q1022 by solder, conductive paste, or the like.

The electric wiring W1305 provided in the third wiring connection portion 1323 of the Y-axis movable body 1300 and the electric wiring (second power supply wiring) W1107 provided in the base member 1100 are a conductive suspension wire (second). Suspension wire) It is connected by SW1031 (see FIG. 19). The electrical wiring W1306 provided in the third wiring connection portion 1323 and the electrical wiring (second power supply wiring) W1108 provided in the base member 1100 are connected by a conductive suspension wire (second suspension wire) SW1032. Has been done. As described above, the lens driving device 1A includes two suspension wires SW1031 and SW1032 that connect the base member 1100 and the Y-axis movable body 1300. The Z-axis actuator 1330 is connected to the electrical wirings W1107 and W1108 provided on the base member 1100 via the suspension wires SW1031 and SW1032, respectively.

Specifically, one end of the suspension wire SW1031 is inserted into the connection point P1031, and the other end is passed through the connection point Q1031. The suspension wire SW1031 and the electrical wiring W1107 are connected to each other at the connection point P1031 by solder, conductive paste, or the like. The suspension wire SW1031 and the electrical wiring W1305 are connected to each other at the connection point Q1031 by solder, conductive paste, or the like. Further, one end of the suspension wire SW1032 is inserted into the connection point P1032, and the other end is passed through the connection point Q1032. The suspension wire SW1032 and the electrical wiring W1108 are connected to each other at the connection point P1032 by solder, conductive paste, or the like. The suspension wire SW1032 and the electrical wiring W1306 are connected to each other at the connection point Q1032 by solder, conductive paste, or the like.

The connection positions of the electrical wirings W1301 to W1306 provided on the Y-axis movable body 1300 and the suspension wires SW1011, SW1012, SW1021, SW1022, SW1031 and SW1032 are height positions along the optical axis L direction from the base member 1100. Are almost the same as each other. Further, the connection position between the electric wiring W1301 provided on the Y-axis movable body 1300 and the suspension wire SW1011 and the connection position between the electric wiring W1201 provided on the X-axis movable body 1200 and the suspension wire SW1041 are the base member 1100. The height positions along the L direction of the optical axis from are substantially the same as each other. The term "heights are substantially the same" as used herein includes the case where the heights are completely the same as each other and the case where there is a slight difference within the scope of making the heights uniform. As a result, the lengths of the suspension wires SW1011, SW1012, SW1021, SW1022, SW1031, SW1032, SW1041 and SW1042 are substantially the same.

As shown in FIG. 21, the suspension wires SW1011 and SW1012 are paired, the suspension wires SW1021 and SW1022 are paired, the suspension wires SW1031 and SW1032 are paired, and the suspension wires SW1041 and SW1042 are paired. Each set of suspension wires is located at each of the four corners of the base member 1100.

As shown in FIG. 29 and the like, the suspension wires SW1041 and SW1042 are connected to the electrical wirings W1201 and W1202 provided in the overhanging portion 1260a projecting outward in the rising portion 1260. By providing the overhanging portion 1260a in this way, when the X-axis movable body 1200 moves in the X-axis direction with respect to the base member 1100, the suspension wires SW1041 and SW1042 come into contact with the base end portion of the rising portion 1260. Can be prevented.

Further, the suspension wires SW1011 and SW1012 are connected to the electric wires W1301 and W1302 provided in the first wiring connection portion 1321 protruding outward from the first side wall portion 1311a. By providing the first wiring connection portion 1321 in this way, when the Y-axis movable body 1300 moves in the X-axis direction and the Y-axis direction with respect to the base member 1100, the suspension wires SW1011 and SW1012 are moved to the first side wall portion. It is possible to prevent the 1311a from coming into contact with the base end portion. Similarly, on the second wiring connection portion 1322 side and the third wiring connection portion 1323 side, the suspension wires SW1021 and SW1022 abut on the base end portion of the second side wall portion 1311b, and the suspension wires SW1031 and SW1032 are the third. It is possible to prevent the side wall portion 1311c from coming into contact with the base end portion.

Next, the magnet MG1003 provided on the lens carrier 1400 will be described. As shown in FIG. 35, a magnet MG1003 is provided at a position of the carrier main body 1410 facing the Hall sensor HS1003. The Hall sensor HS1003 detects the position of the lens carrier 1400 with respect to the Y-axis movable body 1300 based on the change in the magnetic field of the magnet MG1003 that moves together with the carrier main body 1410. The Z-axis actuator 1330 is feedback-controlled based on the detection result of the Hall sensor HS1003.

As described above, according to the lens driving device 1, the base member 1100, the X-axis actuator 1130, the X-axis movable body 1200, the Y-axis actuator 1230, the Y-axis movable body 1300, the Z-axis actuator 1330, and the lens carrier 1400 are in this order. Each member is sequentially connected. As a result, when the X-axis actuator 1130 moves the X-axis movable body 1200 with respect to the base member 1100, the X-axis actuator 1130 causes the entire member from the X-axis movable body 1200 to the lens carrier 1400 (X-axis movable body 1200). , Y-axis actuator 1230, Y-axis movable body 1300, Z-axis actuator 1330, and lens carrier 1400) are moved. When the Y-axis actuator 1230 moves the Y-axis movable body 1300 with respect to the X-axis movable body 1200, the entire member from the Y-axis movable body 1300 to the lens carrier 1400 (Y-axis movable body 1300, The Z-axis actuator 1330 and the lens carrier 1400) are moved. When the Z-axis actuator 1330 moves the lens carrier 1400 with respect to the Y-axis movable body 1300, only the lens carrier 1400 is moved by the Z-axis actuator 1330. As a result, even when the X-axis actuator 1130, the Y-axis actuator 1230, and the Z-axis actuator 1330 move each member, the movement is not hindered between the members. As a result, the lens driving device 1A can suppress the occurrence of crosstalk between the moving members.

The lens driving device 1A includes two suspension wires SW1041 and SW1042 that connect the base member 1100 and the X-axis movable body 1200. In this case, the lens driving device 1A can supply electric power to the Y-axis actuator 1230 moving with respect to the base member 1100 via the suspension wires SW1041 and SW1042.

The lens driving device 1A includes two suspension wires SW1031 and SW1032 that connect the base member 1100 and the Y-axis movable body 1300. In this case, the lens driving device 1A can supply electric power to the Z-axis actuator 1330 moving with respect to the base member 1100 via the suspension wires SW1031 and SW1032.

At least a part of the Z-axis actuator 1330 overlaps the lens carrier 1400 in the L direction of the optical axis. In this case, the lens driving device 1A can be reduced in height.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, the lens driving device 1 in the first embodiment may include an XY movable body that can move in the X-axis direction and the Y-axis direction instead of the auxiliary body 200 and the movable body 300. In this case, the lens driving device 1 may include an XY-axis actuator (first actuator) that moves the XY movable body in the X-axis direction and the Y-axis direction instead of the X-axis actuator 130 and the Y-axis actuator 230. .. Similarly, the lens driving device 1A in the second embodiment may include an XY movable body that can move in the X-axis direction and the Y-axis direction instead of the X-axis movable body 1200 and the Y-axis movable body 1300. In this case, the lens driving device 1A may include an XY-axis actuator (first actuator) that moves the XY movable body in the X-axis direction and the Y-axis direction instead of the X-axis actuator 1130 and the Y-axis actuator 1230. ..

The X-axis actuators 130, 1130, the Y-axis actuators 230, 1230, and the Z-axis actuators 330, 1330 may be mechanisms other than the mechanism using the piezoelectric element. Further, although the lens driving devices 1 and 1A have detected the position of the moving member by using the hall sensors HS1 to HS3 and HS1001 to 1003, a position sensor other than the hall sensor may be used.

The suspension wire SW12 and the suspension wire SW13 in the first embodiment may be provided on the same side of the four sides H11 to H14 of the base main body 110.

1,1A ... Lens drive device, 4,4A ... Lens, 100, 1100 ... Base member, 110, 1110 ... Base body, 110a, 1110a ... Opening, 200 ... Auxiliary body (movable body, X-axis movable body), 130, 1130 ... X-axis actuator (first actuator), 230, 1230 ... Y-axis actuator (first actuator), 300 ... movable body (Y-axis movable body), 330, 1330 ... Z-axis actuator (second actuator), 400, 1400 ... Lens carrier 1200 ... X-axis movable body (movable body), 1300 ... Y-axis movable body (movable body), L ... Optical axis, SW12, SW1041, SW1042 ... Suspension wire (first suspension wire), SW13 , SW1031, SW1032 ... Suspension wire (second suspension wire), T11 to T13 ... Protrusions, W12, W1109, W1110 ... Electrical wiring (first power supply wiring), W13, W1107, W1108 ... Electrical wiring (second power supply) wiring).

Claims (9)

It is a lens driving device that drives a lens.
With the base member
Movable body and
A first actuator that connects the base member and the movable body and moves the movable body with respect to the base member in the X-axis direction and the Y-axis direction orthogonal to the X-axis direction.
A lens carrier to which the lens can be attached and
A second actuator that connects the movable body and the lens carrier and moves the lens carrier with respect to the movable body in the Z-axis direction orthogonal to the X-axis direction and the Y-axis direction is provided .
The movable body includes an X-axis movable body and a Y-axis movable body.
The first actuator includes an X-axis actuator and a Y-axis actuator.
The X-axis actuator connects the base member and the X-axis movable body, and moves the X-axis movable body with respect to the base member in the X-axis direction.
The Y-axis actuator connects the X-axis movable body and the Y-axis movable body, and moves the Y-axis movable body with respect to the X-axis movable body in the Y-axis direction.
The second actuator connects the Y-axis movable body and the lens carrier, and moves the lens carrier in the Z-axis direction with respect to the Y-axis movable body.
A plurality of first suspension wires for connecting the base member and the X-axis movable body are further provided.
The first suspension wire has conductivity and
The Y-axis actuator is a lens driving device connected to a first power supply wiring provided on the base member via the first suspension wire. It is a lens driving device that drives a lens.
With the base member
Movable body and
A first actuator that connects the base member and the movable body and moves the movable body with respect to the base member in the X-axis direction and the Y-axis direction orthogonal to the X-axis direction.
A lens carrier to which the lens can be attached and
A second actuator that connects the movable body and the lens carrier and moves the lens carrier with respect to the movable body in the Z-axis direction orthogonal to the X-axis direction and the Y-axis direction is provided .
The movable body includes an X-axis movable body and a Y-axis movable body.
The first actuator includes an X-axis actuator and a Y-axis actuator.
The X-axis actuator connects the base member and the X-axis movable body, and moves the X-axis movable body with respect to the base member in the X-axis direction.
The Y-axis actuator connects the X-axis movable body and the Y-axis movable body, and moves the Y-axis movable body with respect to the X-axis movable body in the Y-axis direction.
The second actuator connects the Y-axis movable body and the lens carrier, and moves the lens carrier in the Z-axis direction with respect to the Y-axis movable body.
A plurality of second suspension wires for connecting the base member and the Y-axis movable body are further provided.
The second suspension wire has conductivity and
The second actuator is a lens driving device connected to a second power supply wiring provided on the base member via the second suspension wire. The base member includes a base body portion having an opening through which the optical axis of the lens passes.
The base body is formed in the shape of a substantially rectangular plate having four corners when viewed along the optical axis direction of the lens.
The base body and the X-axis movable body are arranged side by side along the optical axis direction.
The plurality of the first suspension wires are arranged side by side along a side connecting the corners between adjacent, and the base body portion and a said X-axis movable body is connected, according to claim 1 Lens drive device. The base member includes a base body portion having an opening through which the optical axis of the lens passes.
The base body is formed in the shape of a substantially rectangular plate having four corners when viewed along the optical axis direction of the lens.
The base body and the Y-axis movable body are arranged side by side along the optical axis direction.
A plurality of said second suspension wires are arranged side by side along a side connecting the corners between adjacent, are connected the base body portion and a said Y-axis movable body respectively, according to claim 2 Lens drive device. A plurality of second suspension wires for connecting the base member and the Y-axis movable body are further provided.
The second suspension wire has conductivity and
The base member includes a base body portion having an opening through which the optical axis of the lens passes.
The base body is formed in the shape of a substantially rectangular plate having four corners when viewed along the optical axis direction of the lens.
The base body, the X-axis movable body, and the Y-axis movable body are arranged side by side along the optical axis direction.
The plurality of first suspension wires are arranged side by side along the first side of the four sides connecting the adjacent corners, and connect the base main body and the X-axis movable body, respectively. ,
The plurality of second suspension wires are arranged side by side along the first side of the four sides connecting the adjacent corners or the side different from the first side, and the base. The lens driving device according to claim 1 , wherein the main body and the Y-axis movable body are connected to each other. The base member includes a base body portion having an opening through which the optical axis of the lens passes.
The base body is formed in the shape of a substantially rectangular plate having four corners when viewed along the optical axis direction of the lens.
Wherein the first actuator and at least one of said second actuator, when viewed along the optical axis direction of the lens, is disposed in a region between said corners the opening, according to claim 1 Or the lens driving device according to 2. Wherein the first actuator and at least one of said second actuator, when viewed along the optical axis direction of the lens, is disposed in a region between said corners the opening, according to claim 3 The lens driving device according to any one of 5 to 5. The Z-axis direction and the optical axis direction of the lens are the same directions.
The lens driving device according to any one of claims 1 to 7 , wherein at least a part of the first actuator and the second actuator overlaps with the lens carrier in the optical axis direction of the lens. The base member includes protrusions and
The lens driving device according to any one of claims 1 to 8 , wherein the movable body is slidably in contact with the protrusion.

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