Optical device

Abstract

An optical device (101) comprises: a fixed-side member (FB); a movable-side member (MB) that includes an optical element holding member (2) capable of holding a lens body, and an imaging element holding member (4) capable of holding an imaging element (IS) disposed so as to face the lens body in the optical axis direction; a first drive unit (DM1) that moves the optical element holding member (2) in the optical axis direction and includes at least a first coil (C1) held by the optical element holding member (2), and a first magnet (M1) facing the first coil (C1); and a second drive unit (DM2) that moves the movable-side member (MB) relative to the fixed-side member (FB) in a direction different from the optical axis direction and includes at least a second coil (C2) held by the movable-side member (MB), and a second magnet (M2) facing the second coil (C2). The first magnet (M1) and the second magnet (M2) are provided so as to be incapable of moving relative to each other.

Description

optical device

[0001] The present disclosure relates to optical devices.

[0002] 2. Description of the Related Art Conventionally, there has been known a lens driving device (optical device) in which a permanent magnet is used as both an autofocus lens driving section and an image stabilization lens driving section (see Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2017-076135

[0004] However, in this optical device, the only permanent magnet used to drive the lens body is a permanent magnet that is shared by both the autofocus lens drive unit and the image stabilization lens drive unit, which limits the direction in which the lens body can be driven.

[0005] Therefore, it is desirable to provide an optical device that can more flexibly move optical elements such as lenses using magnets.

[0006] An optical device according to an embodiment of the present disclosure is an optical device comprising: a fixed-side member; an optical element holding member capable of holding a lens body; a movable-side member including an image pickup element holding member arranged opposite the lens body in the optical axis direction and immovable relative to the image pickup element; and a first drive unit including at least a first coil held by the optical element holding member and a first magnet opposite the first coil, and moving the optical element holding member in the optical axis direction, and a second drive unit including at least a second coil held by the movable-side member and a second magnet that applies a magnetic field to the second coil, and moving the movable-side member in a direction different from the optical axis direction relative to the fixed-side member, and the first magnet and the second magnet are arranged so as not to be movable relative to each other.

[0007] The optical device described above allows for more flexible movement of the optical elements.

[0008] 1 is a perspective view of an optical device according to an embodiment of the present disclosure. FIG. 1 is an exploded perspective view of the optical device shown in FIG. 1. FIG. 2 is an exploded perspective view of a lower member constituting the optical device shown in FIG. 1. FIG. 3 is an exploded perspective view of a movable member constituting the optical device shown in FIG. 1. FIG. 4 is an exploded perspective view of a fixed member constituting the optical device shown in FIG. 1. FIG. 5 is a bottom perspective view of members constituting the optical device shown in FIG. 1. FIG. 6 is a top view and a front view of members constituting the optical device shown in FIG. 1. FIG. 7 is a perspective view of members related to the conductive paths of the optical device shown in FIG. 1. FIG. 8 is a top view and a partial cross-sectional view of the optical device shown in FIG. 1. FIG. 9 is a top view and a partial cross-sectional view of the optical device shown in FIG. 1. FIG. 10 is a perspective view of a fixed member and a coil holding member constituting the optical device shown in FIG. 1.

[0009] An optical device 101 according to an embodiment of the present disclosure will now be described with reference to the drawings. FIG. 1 is a perspective view of the optical device 101. FIG. 2 is an exploded perspective view of the optical device 101, which is composed of a cover member 1 and a lower member LB, showing a state in which the cover member 1 has been separated from the lower member LB. FIG. 3 is an exploded perspective view of the lower member LB, which includes a movable member MB and a fixed member FB. FIG. 4 is an exploded perspective view of the movable member MB. FIG. 5 is an exploded perspective view of the fixed member FB. FIG. 6 is a bottom perspective view of the members that constitute the optical device 101.

[0010] In FIG. 1 , X1 represents one direction of the X axis constituting the three-dimensional Cartesian coordinate system, and X2 represents the other direction of the X axis. Furthermore, Y1 represents one direction of the Y axis constituting the three-dimensional Cartesian coordinate system, and Y2 represents the other direction of the Y axis. Similarly, Z1 represents one direction of the Z axis constituting the three-dimensional Cartesian coordinate system, and Z2 represents the other direction of the Z axis. In FIG. 1 , the X1 side of the optical device 101 corresponds to the front side (front surface side) of the optical device 101, and the X2 side of the optical device 101 corresponds to the rear side (rear surface side) of the optical device 101. Furthermore, the Y1 side of the optical device 101 corresponds to the left side of the optical device 101, and the Y2 side of the optical device 101 corresponds to the right side of the optical device 101. Furthermore, the Z1 side of the optical device 101 corresponds to the upper side of the optical device 101, and the Z2 side of the optical device 101 corresponds to the lower side of the optical device 101. The same applies to other components in other figures.

[0011] The optical device 101 is a device for moving the optical element OE. In FIG. 2, the optical element OE is depicted as having a substantially cylindrical shape, but may have other shapes, such as a rectangular parallelepiped shape. Also, in some of the drawings below, the optical element OE is omitted for clarity. The optical element OE is, for example, a light-emitting element, a light-receiving element, a lens body, a mirror, a prism, an optical filter, or the like. The lens body is a cylindrical lens barrel having at least one lens. In the illustrated example, the optical element OE is a lens body.

[0012] As shown in FIGS. 1 and 2 , the optical device 101 includes a lower member LB and a cover member 1 that is part of the fixed member FB. The cover member 1 is configured to cover the lower member LB. In the illustrated example, the cover member 1 is fabricated by subjecting a plate material made of a non-magnetic metal such as austenitic stainless steel to punching, drawing, and other processes. Because the cover member 1 is made of a non-magnetic metal, it does not have a negative magnetic effect on the drive units DM (first drive unit DM1, second drive unit DM2, and third drive unit DM3) that utilize electromagnetic force. However, the cover member 1 may be made of a magnetic metal or synthetic resin.

[0013] As shown in FIG. 2, the cover member 1 has a rectangular cylindrical outer shape with a lid that defines the storage section 1S. Specifically, the cover member 1 has a substantially rectangular cylindrical outer wall portion 1A and a substantially rectangular annular, flat top plate portion 1B that is continuous with the upper end (the end on the Z1 side) of the outer wall portion 1A. A substantially circular opening 1K is formed in the center of the top plate portion 1B. The outer wall portion 1A includes a first side plate portion 1A1 to a fourth side plate portion 1A4. The first side plate portion 1A1 and the third side plate portion 1A3 face each other, and the second side plate portion 1A2 and the fourth side plate portion 1A4 face each other. The second side plate portion 1A2 and the fourth side plate portion 1A4 extend perpendicular to the first side plate portion 1A1 and the third side plate portion 1A3. As shown in FIG. 1, the lower end of the cover member 1 is bonded to the base member 7 with an adhesive, thereby constituting the housing HS together with the base member 7.

[0014] As shown in FIG. 3 , the lower member LB includes a movable member MB and a fixed member FB. As shown in FIG. 4 , the movable member MB includes an optical element holding member 2, a coil holding member 3, an image sensor holding member 4, a first coil C1, a second coil C2, a third coil C3, an embedded member EM, a second leaf spring LS2, a third leaf spring LS3, a conductive member PT, and a suspension wire SW. A board SB on which the image sensor IS is mounted is attached to the lower side of the image sensor holding member 4. As shown in FIG. 5 , the fixed member FB includes a magnet holding member 5, a magnetic member 6, a base member 7, a first leaf spring LS1, a first magnet M1, and a second magnet M2. Note that the first leaf spring LS1 is shown as being included in the fixed member FB for ease of explanation, but it may also be included in the movable member MB.

[0015] The optical element holding member 2 is a member for holding the optical element OE. In the illustrated example, the optical element holding member 2 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). Specifically, as shown in FIG. 4 , the optical element holding member 2 has a cylindrical portion 2C that is approximately octagonal and annular in shape when viewed from above. A first coil C1 is wound around the outer periphery of the cylindrical portion 2C. In the illustrated example, a lens body serving as the optical element OE is fixed to the inner circumferential surface of the cylindrical portion 2C with an adhesive. Furthermore, four protrusions 2P protruding upward are provided on the upper end surface of the cylindrical portion 2C. As shown in FIG. 3 , the inner end portion IP of the second leaf spring LS2 is attached to each of the four protrusions 2P (rear protrusion 2PB, front protrusion 2PF, left protrusion 2PL, and right protrusion 2PR). Furthermore, as shown in FIG. 6 , four downward protrusions 2Q protruding downward are provided on the lower end surface of the cylindrical portion 2C. An inner end portion IP of a third leaf spring LS3 is attached to each of the four downward protrusions 2Q (rear downward protrusion 2QB, front downward protrusion 2QF, left downward protrusion 2QL, and right downward protrusion 2QR).

[0016] The coil holding member 3 is a member for holding the second coil C2. In the illustrated example, the coil holding member 3 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). Specifically, as shown in FIG. 4 , the coil holding member 3 has a base 3B that is substantially rectangular and annular in top view, and four coil accommodating portions 3S provided at the four corners of the base 3B. Each coil accommodating portion 3S has an annular upper surface and a cylindrical circumferential surface, and has a circular opening on the bottom so that the cylindrical second coil C2 can be accommodated therein. Specifically, the coil accommodating portions 3S include a right front coil accommodating portion 3SA that accommodates the second right front coil C2A, a left front coil accommodating portion 3SB that accommodates the second left front coil C2B, a left rear coil accommodating portion 3SC that accommodates the second left rear coil C2C, and a right rear coil accommodating portion 3SD that accommodates the second right rear coil C2D. As shown in FIG. 3, the outer end portion EP of the first leaf spring LS1 and the outer end portion EP of the second leaf spring LS2 are attached to the upper end surfaces of the four coil accommodating portions 3S, respectively.

[0017] The image sensor holding member 4 is a member that is immovable relative to the image sensor IS. In the illustrated example, the image sensor holding member 4 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). Specifically, as shown in FIG. 4 , the image sensor holding member 4 has a base 4B that is substantially rectangular and annular in top view. Four protrusions 4P and four projections 4T protruding upward are provided on the upper end surface of the base 4B. As shown in FIG. 7 , the outer end EP of a third leaf spring LS3 is attached to each of the upper end surfaces of the four projections 4P (rear projection 4PB, front projection 4PF, left projection 4PL, and right projection 4PR). A third coil C3 is attached around each of the four projections 4T. Note that FIG. 7 is a top view and a front view of the components that make up the optical device 101. In FIG. 7, for clarity, the cover member 1, the coil holding member 3, the magnet holding member 5, the first leaf spring LS1, and the second leaf spring LS2 are not shown.

[0018] Specifically, as shown in FIG. 3 , the image sensor holding member 4 is integrally provided with the substrate SB on which the image sensor IS is mounted. In the illustrated example, the substrate SB is a rigid substrate, and a flexible circuit board (not shown) is connected to its underside. As shown in FIG. 6 , four spacer portions 4S protruding downward are provided on the underside of the image sensor holding member 4. Each of the four spacer portions 4S is a portion for determining the position (height) of the substrate SB (image sensor IS) in the Z-axis direction, and the lower end surface of each of the four spacer portions 4S contacts the upper surface of the substrate SB. Note that the four spacer portions 4S may be replaced with a single frame-shaped protrusion or two L-shaped protrusions, for example.

[0019] The magnet holding member 5 is a member for holding a magnet. In the illustrated example, the magnet holding member 5 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). Specifically, as shown in FIG. 5 , the magnet holding member 5 has a base 5B that is polygonal and annular in shape when viewed from above. Four protrusions 5P that protrude upward are provided on the upper end surface of the base 5B. The inner end IP of the first leaf spring LS1 is attached to each of the four protrusions 5P (rear protrusion 5PB, front protrusion 5PF, left protrusion 5PL, and right protrusion 5PR). In addition, the upper surfaces of the first magnet M1 and the second magnet M2 are fixed to the lower surface of the base 5B.

[0020] The magnetic member 6 functions as a magnetic yoke for guiding the magnetic field (magnetic flux) generated by the second magnet M2. In the illustrated example, the magnetic member 6 is made of a magnetic metal. Specifically, as shown in FIG. 5 , the magnetic member 6 has a base 6B that is substantially rectangular and annular in top view, and four protrusions 6P provided at each of the four corners of the base 6B. The lower surface of the second magnet M2 is fixed to the upper surface of the base 6B. Furthermore, each of the four protrusions 6P is arranged to face the inner circumferential surface of the second coil C2 without contacting it.

[0021] The base member 7 is a member that constitutes a part of the housing HS of the optical device 101. In the illustrated example, the base member 7 is formed by injection molding a synthetic resin such as liquid crystal polymer (LCP). The lower surface of the base 6B of the magnetic member 6 is fixed to the upper surface of the base member 7 with an adhesive or the like.

[0022] The first leaf spring LS1, the second leaf spring LS2, and the third leaf spring LS3 are members for movably connecting one of two members to the other. Specifically, the first leaf spring LS1, the second leaf spring LS2, and the third leaf spring LS3 are made from metal plates whose main material is, for example, a copper alloy, a titanium-copper alloy (titanium-copper), or a copper-nickel alloy (nickel-tin-copper).

[0023] 3, the first leaf spring LS1 is disposed so as to connect the upper surface of the coil holding member 3 and the upper surface of the magnet holding member 5. Specifically, as shown in Fig. 5, the first leaf spring LS1 includes an inner end IP fixed to the magnet holding member 5, an outer end EP fixed to the coil holding member 3, and an elastic arm portion AP provided between the inner end IP and the outer end EP.

[0024] 5, the first leaf spring LS1 includes four leaf springs (first right front leaf spring LS1A, first left front leaf spring LS1B, first left rear leaf spring LS1C, and first right rear leaf spring LS1D) having the same shape and size. The first right front leaf spring LS1A has an inner end IP fixed to the front protrusion 5PF of the magnet holding member 5 and an outer end EP fixed to the right front coil housing portion 3SA of the coil holding member 3. The first left front leaf spring LS1B has an inner end IP fixed to the left protrusion 5PL of the magnet holding member 5 and an outer end EP fixed to the left front coil housing portion 3SB of the coil holding member 3. The first left rear leaf spring LS1C has an inner end IP fixed to the rear protrusion 5PB of the magnet holding member 5 and an outer end EP fixed to the left rear coil accommodating portion 3SC of the coil holding member 3. The first right rear leaf spring LS1D has an inner end IP fixed to the right protrusion 5PR of the magnet holding member 5 and an outer end EP fixed to the right rear coil accommodating portion 3SD of the coil holding member 3.

[0025] 3, the second leaf spring LS2 is arranged to connect the upper surface of the coil holding member 3 and the upper surface of the optical element holding member 2. Specifically, as shown in Fig. 4, the second leaf spring LS2 includes an inner end IP fixed to the optical element holding member 2, an outer end EP fixed to the coil holding member 3, and an elastic arm portion AP provided between the inner end IP and the outer end EP.

[0026] 4, the second leaf spring LS2 includes four leaf springs (a second right front leaf spring LS2A, a second left front leaf spring LS2B, a second left rear leaf spring LS2C, and a second right rear leaf spring LS2D) having the same shape and size. The second right front leaf spring LS2A has an inner end IP fixed to the right protrusion 2PR of the optical element holding member 2 and an outer end EP fixed to the right front coil accommodating portion 3SA of the coil holding member 3. The second left front leaf spring LS2B has an inner end IP fixed to the front protrusion 2PF of the optical element holding member 2 and an outer end EP fixed to the left front coil accommodating portion 3SB of the coil holding member 3. The second left rear leaf spring LS2C has an inner end IP fixed to the left protrusion 2PL of the optical element holding member 2 and an outer end EP fixed to the left rear coil accommodating portion 3SC of the coil holding member 3. The second right rear leaf spring LS2D has an inner end IP fixed to the rear protrusion 2PB of the optical element holding member 2 and an outer end EP fixed to the right rear coil accommodating portion 3SD of the coil holding member 3.

[0027] 7, the third leaf spring LS3 is disposed so as to connect the lower surface of the optical element holding member 2 and the upper surface of the imaging element holding member 4. Specifically, as shown in Fig. 4, the third leaf spring LS3 includes an inner end IP fixed to the optical element holding member 2, an outer end EP fixed to the imaging element holding member 4, and an elastic arm portion AP provided between the inner end IP and the outer end EP.

[0028] 4, the third leaf spring LS3 includes four leaf springs (a third right front leaf spring LS3A, a third left front leaf spring LS3B, a third left rear leaf spring LS3C, and a third right rear leaf spring LS3D) having the same shape and size. The third right front leaf spring LS3A has an inner end IP fixed to the front downward protrusion 2QF of the optical element holder 2 and an outer end EP fixed to the right protrusion 4PR of the image pickup element holder 4. The third left front leaf spring LS3B has an inner end IP fixed to the left downward protrusion 2QL of the optical element holder 2 and an outer end EP fixed to the front protrusion 4PF of the image pickup element holder 4. The third left rear leaf spring LS3C has an inner end IP fixed to the rear downward protrusion 2QB of the optical element hold member 2 and an outer end EP fixed to the left protrusion 4PL of the image pickup element hold member 4. The third right rear leaf spring LS3D has an inner end IP fixed to the right downward protrusion 2QR of the optical element hold member 2 and an outer end EP fixed to the rear protrusion 4PB of the image pickup element hold member 4.

[0029] In the illustrated example, the first leaf spring LS1, the second leaf spring LS2, and the third leaf spring LS3 are fixed to the respective components using an adhesive, but may be fixed by other methods such as caulking. Furthermore, the first leaf spring LS1, the second leaf spring LS2, and the third leaf spring LS3 are each arranged so as to have four-fold rotational symmetry about the optical axis OA when viewed from above.

[0030] The first coil C1 is a coil attached to the optical element holding member 2. In the illustrated example, the first coil C1 is a substantially octagonal ring-shaped coil wound around the outer periphery of the cylindrical portion 2C of the optical element holding member 2, as shown in FIG.

[0031] The second coil C2 is a coil held by the coil holding member 3. In the illustrated example, the second coil C2 is a substantially cylindrical coil accommodated in the coil housing portion 3S of the coil holding member 3 and attached to the coil holding member 3 so as to move together with the coil holding member 3. Specifically, the second coil C2 includes a second right front coil C2A accommodated in the right front coil housing portion 3SA, a second left front coil C2B accommodated in the left front coil housing portion 3SB, a second left rear coil C2C accommodated in the left rear coil housing portion 3SC, and a second right rear coil C2D accommodated in the right rear coil housing portion 3SD. The second right front coil C2A, the second left front coil C2B, the second left rear coil C2C, and the second right rear coil C2D have the same shape and size.

[0032] The third coil C3 is a coil fixed to the imaging element holding member 4. In the illustrated example, the third coil C3 is a substantially trapezoidal columnar coil wound around the outer periphery of a protrusion 4T provided on the upper surface of the base 4B of the imaging element holding member 4. Specifically, the third coil C3 includes a third right front coil C3A wound around the right front protrusion 4TA, a third left front coil C3B wound around the left front protrusion 4TB, a third left rear coil C3C wound around the left rear protrusion 4TC, and a third right rear coil C3D wound around the right rear protrusion 4TD. The third right front coil C3A, the third left front coil C3B, the third left rear coil C3C, and the third right rear coil C3D have the same shape and size.

[0033] The first coil C1, the second coil C2, and the third coil C3 are all wound coils formed by winding a conductive wire whose surface is coated with an insulating material, and are fixed to each member with an adhesive. Note that, for clarity, the attached drawings omit detailed illustrations of the winding state of the conductive wire whose surface is coated with an insulating material for the first coil C1, the second coil C2, and the third coil C3.

[0034] The first magnet M1 is a magnet fixed to the magnet holding member 5. In the illustrated example, the first magnet M1 is a substantially trapezoidal cylindrical permanent magnet magnetized with two poles along the radial direction of a circle centered on the optical axis OA, as shown in FIG. 7 . Note that in FIG. 7 , for ease of explanation, a cross pattern is applied to the north pole portion of the first magnet M1, and a dot pattern is applied to the south pole portion of the first magnet M1. Specifically, the first magnet M1 includes four permanent magnets (a first right front magnet M1A, a first left front magnet M1B, a first left rear magnet M1C, and a first right rear magnet M1D) having the same shape and size and arranged to face the first coil C1 in a direction perpendicular to the optical axis OA. In the illustrated example, the first right front magnet M1A, first left front magnet M1B, first left rear magnet M1C, and first right rear magnet M1D are each magnetized with an S pole on the inside and an N pole on the outside. Note that "inside" refers to the side closer to the optical axis OA, and "outside" refers to the side farther from the optical axis OA. The same applies to the following description. Note that the first right front magnet M1A, first left front magnet M1B, first left rear magnet M1C, and first right rear magnet M1D may each be magnetized with an N pole on the inside and an S pole on the outside.

[0035] The second magnet M2 is a magnet fixed to the magnet holding member 5 and the magnetic member 6. In the illustrated example, the second magnet M2 is a substantially rectangular parallelepiped permanent magnet magnetized with two poles along the Z-axis direction, as shown in FIG. 7 . Note that in FIG. 7 , for ease of explanation, a cross pattern is applied to the north pole portion of the second magnet M2, and a dot pattern is applied to the south pole portion of the second magnet M2. Specifically, the second magnet M2 includes four permanent magnets (a second rear magnet M2B, a second front magnet M2F, a second left-side magnet M2L, and a second right-side magnet M2R) having the same shape and size and arranged on the upper surface 6BS of the base 6B of the magnetic member 6. In the illustrated example, the second rear magnet M2B, the second front magnet M2F, the second left-side magnet M2L, and the second right-side magnet M2R are magnetized with south poles on the upper side and north poles on the lower side. In addition, the second rear magnet M2B, the second front magnet M2F, the second left magnet M2L, and the second right magnet M2R may have their upper sides magnetized to the north pole and their lower sides magnetized to the south pole.

[0036] The third magnet M3 is a magnet fixed to the magnet holding member 5. In the illustrated example, the third magnet M3 also serves as the first magnet M1, as shown in FIG. 7 . Specifically, as shown in FIG. 7 , the third magnet M3 includes a third right front magnet M3A (first right front magnet M1A) arranged to face the third right front coil C3A in the Z-axis direction, a third left front magnet M3B (first left front magnet M1B) arranged to face the third left front coil C3B in the Z-axis direction, a third left rear magnet M3C (first left rear magnet M1C) arranged to face the third left rear coil C3C in the Z-axis direction, and a third right rear magnet M3D (first right rear magnet M1D) arranged to face the third right rear coil C3D in the Z-axis direction.

[0037] The first driving unit DM1 is an electromagnetic driving unit for moving the optical element holding member 2 in the optical axis direction relative to the fixed-side member FB. In the illustrated example, the first driving unit DM1 includes a first coil C1 held by the optical element holding member 2 and a first magnet M1 facing the first coil C1.

[0038] The second drive unit DM2 is an electromagnetic drive unit that moves the movable member MB relative to the fixed member FB in a direction different from the optical axis direction. In the illustrated example, the second drive unit DM2 includes a second coil C2 held by the movable member MB (coil holding member 3) and a second magnet M2 that applies a magnetic field to the second coil C2. For example, the second drive unit DM2 can tilt the movable member MB about a first tilt axis SA1 (see FIG. 2 ) parallel to the X-axis by raising the second right front coil C2A and the second right rear coil C2D and lowering the second left front coil C2B and the second left rear coil C2C. Alternatively, the second drive unit DM2 can tilt the movable member MB about a second tilt axis SA2 (see FIG. 2) parallel to the Y-axis by raising the second right front coil C2A and the second left front coil C2B and lowering the second left rear coil C2C and the second right rear coil C2D. Alternatively, the second drive unit DM2 can tilt the movable member MB about a third tilt axis SA3 (see FIG. 2) parallel to a diagonal line of the optical device 101 by raising the second right front coil C2A and lowering the second left rear coil C2C. Alternatively, the second drive unit DM2 can tilt the movable member MB about a fourth tilt axis SA4 (see FIG. 2) parallel to another diagonal line of the optical device 101 by raising the second left front coil C2B and lowering the second right rear coil C2D.

[0039] The third drive unit DM3 is an electromagnetic drive unit that moves the image sensor holding member 4 in a direction intersecting the optical axis relative to the optical element holding member 2. In the illustrated example, the third drive unit DM3 includes a third coil C3 held by the image sensor holding member 4 and a third magnet M3 (first magnet M1) facing the third coil C3. For example, the third drive unit DM3 can translate the movable member MB along the surface (XY plane) of the image sensor IS.

[0040] The embedded members EM are members embedded in the imaging element holding member 4, and include a first embedded member EM1 to an eighteenth embedded member EM18 as shown in Fig. 4. Specifically, the embedded members EM are formed from a metal plate containing, for example, a material such as copper, iron, or an alloy containing these as its main component, and are embedded in the imaging element holding member 4 by insert molding so that both ends are exposed.

[0041] The suspension wires SW are configured so that the imaging element holding member 4 and the coil holding member 3 are movable relative to the fixed member FB in a direction parallel to the surface (XY plane) of the imaging element IS. In the illustrated example, the suspension wires SW are wires formed from a metal material with excellent elasticity, and include first wires SW1 to eighth wires SW8. As shown in FIG. 4 , the lower end (the end on the Z2 side) of each of the first wires SW1 to eighth wires SW8 is fixed to the embedded member EM by soldering, welding, a conductive adhesive, or the like, and the upper end (the end on the Z1 side) is fixed to the conductive member PT by soldering, welding, a conductive adhesive, or the like.

[0042] In this way, the imaging element holding member 4 is connected so as to be suspended from the coil holding member 3 by the first wire SW1 to the eighth wire SW8, and is configured to follow the movement of the coil holding member 3.

[0043] The conductive members PT are members that provide a conductive path for passing current through the second coil C2. In the illustrated example, the conductive members PT include a first conductive member PT1 to an eighth conductive member PT8. Specifically, as shown in FIG. 3 , the first conductive member PT1 and the second conductive member PT2 are attached to the upper surface of the right front coil housing portion 3SA of the coil holding member 3, the third conductive member PT3 and the fourth conductive member PT4 are attached to the upper surface of the left front coil housing portion 3SB of the coil holding member 3, the fifth conductive member PT5 and the sixth conductive member PT6 are attached to the upper surface of the left rear coil housing portion 3SC of the coil holding member 3, and the seventh conductive member PT7 and the eighth conductive member PT8 are attached to the upper surface of the right rear coil housing portion 3SD of the coil holding member 3. The conductive members PT and the coil housing portion 3S are bonded together with an adhesive. However, the conductive members PT may be partially embedded in the coil housing portion 3S. The upper ends of the suspension wires SW and the ends (one end and the other end) of the second coil C2 are fixed to the conductive member PT. The lower ends of the suspension wires SW are fixed to the embedded member EM. The suspension wires SW and the second coil C2 are joined to the conductive member PT, and the suspension wires SW and the embedded member EM are joined by soldering, welding, a conductive adhesive, or the like.

[0044] Next, the conductive paths of the optical device 101 will be described with reference to FIGS. 8 and 9 . FIG. 8 is a perspective view of components related to the conductive paths of the optical device 101, and FIG. 9 is a top view and a bottom view of the components related to the conductive paths of the optical device 101. Specifically, the top view of FIG. 9 is a top view of the components related to the conductive paths of the optical device 101, and the bottom view of FIG. 9 is a bottom view of the components related to the conductive paths of the optical device 101. The components related to the conductive paths of the optical device 101 are the first coil C1, the second coil C2, the third coil C3, the embedded member EM, the third left front leaf spring LS3B, the third right rear leaf spring LS3D, the conductive member PT, and the suspension wire SW. Note that, for ease of understanding, components other than those related to the conductive paths of the optical device 101 are omitted from FIGS. 8 and 9 .

[0045] As shown in the lower diagram of FIG. 9 , one end C1S of the first coil C1 is connected to the inner end IP of the third right rear leaf spring LS3D, and the outer end EP of the third right rear leaf spring LS3D is connected to the tenth embedded member EM10. The other end C1E of the first coil C1 is connected to the inner end IP of the third left front leaf spring LS3B, and the outer end EP of the third left front leaf spring LS3B is connected to the ninth embedded member EM9. In the illustrated example, the connection between the one end C1S of the first coil C1 and the inner end IP of the third right rear leaf spring LS3D and the connection between the other end C1E of the first coil C1 and the inner end IP of the third left front leaf spring LS3B are realized by conductive adhesive. However, these connections may also be realized by soldering, welding, or the like.

[0046] 8 and 9, one end C2AS of the second right front coil C2A is connected to the first conductive member PT1, which is connected to the upper end of the first wire SW1, and the lower end of the first wire SW1 is connected to the first embedded member EM1. The other end C2AE of the second right front coil C2A is connected to the second conductive member PT2, which is connected to the upper end of the second wire SW2, and the lower end of the second wire SW2 is connected to the second embedded member EM2.

[0047] 8 and 9, one end C2BS of the second left front coil C2B is connected to a third conductive member PT3, the third conductive member PT3 is connected to an upper end of a third wire SW3, and the lower end of the third wire SW3 is connected to a third embedded member EM3. The other end C2BE of the second left front coil C2B is connected to a fourth conductive member PT4, the fourth conductive member PT4 is connected to an upper end of a fourth wire SW4, and the lower end of the fourth wire SW4 is connected to a fourth embedded member EM4.

[0048] 8 and 9, one end C2CS of the second left rear coil C2C is connected to a fifth conductive member PT5, the fifth conductive member PT5 is connected to an upper end of a fifth wire SW5, and the lower end of the fifth wire SW5 is connected to a fifth embedded member EM5. The other end C2CE of the second left rear coil C2C is connected to a sixth conductive member PT6, the sixth conductive member PT6 is connected to an upper end of the sixth wire SW6, and the lower end of the sixth wire SW6 is connected to a sixth embedded member EM6.

[0049] 8 and 9, one end C2DS of the second right rear coil C2D is connected to a seventh conductive member PT7, the seventh conductive member PT7 is connected to the upper end of a seventh wire SW7, and the lower end of the seventh wire SW7 is connected to a seventh embedded member EM7. The other end C2DE of the second right rear coil C2D is connected to an eighth conductive member PT8, the eighth conductive member PT8 is connected to the upper end of the eighth wire SW8, and the lower end of the eighth wire SW8 is connected to an eighth embedded member EM8.

[0050] Also, as shown in the lower diagrams of Figures 8 and 9, one end C3AS of the third right front coil C3A is connected to the eleventh embedded member EM11, and the other end C3AE of the third right front coil C3A is connected to the twelfth embedded member EM12.

[0051] Also, as shown in the lower diagrams of Figures 8 and 9, one end C3BS of the third left front coil C3B is connected to the 13th embedded member EM13, and the other end C3BE of the third left front coil C3B is connected to the 14th embedded member EM14.

[0052] Also, as shown in the lower diagrams of Figures 8 and 9, one end C3CS of the third left rear coil C3C is connected to the fifteenth embedded member EM15, and the other end C3CE of the third left rear coil C3C is connected to the sixteenth embedded member EM16.

[0053] Also, as shown in the lower diagrams of Figures 8 and 9, one end C3DS of the third right rear coil C3D is connected to the 17th embedded member EM17, and the other end C3DE of the third right rear coil C3D is connected to the 18th embedded member EM18.

[0054] Furthermore, the block arrows in FIG. 8 indicate the direction of the magnetic fields generated by the first magnet M1 (third magnet M3) and the second magnet M2, which are not shown in FIG. 8 . Specifically, the solid black block arrow indicates the direction of the magnetic field generated by the first magnet M1, representing that the magnetic field generated by the first magnet M1 penetrates the first coil C1 from the inside to the outside. The diagonally shaded block arrow indicates the direction of the magnetic field generated by the second magnet M2, representing that the magnetic field generated by the second magnet M2 penetrates the air-core portion AC of the second coil C2. The solid white block arrow indicates the direction of the magnetic field generated by the third magnet M3 (first magnet M1), representing that the magnetic field generated by the third magnet M3 (first magnet M1) penetrates the inner portion of the third coil C3 from bottom to top and penetrates the outer portion of the third coil C3 from top to bottom.

[0055] When the tenth embedded member EM10 is connected to a high potential and the ninth embedded member EM9 is connected to a low potential, current flows from the tenth embedded member EM10 through the third right rear leaf spring LS3D (outer end EP and inner end IP), the first coil C1 (one end C1S and the other end C1E), and the third left front leaf spring LS3B (inner end IP and outer end EP) to the ninth embedded member EM9. At this time, current flows through the first coil C1 in the direction indicated by arrow AR1.

[0056] As a result, the first coil C1 receives a downward force (force due to the Lorentz force), and the movable member MB (optical element holding member 2) moves downward along the optical axis direction. Note that when the tenth embedded member EM10 is connected to a low potential and the ninth embedded member EM9 is connected to a high potential, the first coil C1 receives an upward force (force due to the Lorentz force), and the movable member MB moves upward along the optical axis direction.

[0057] When the second embedded member EM2 is connected to a high potential and the first embedded member EM1 is connected to a low potential, a current flows from the second embedded member EM2 through the second wire SW2, the second conductive member PT2, the second right front coil C2A (the other end C2AE and one end C2AS), the first conductive member PT1, and the first wire SW1 to the first embedded member EM1. At this time, a current flows through the second right front coil C2A in the direction indicated by the arrow AR11.

[0058] When the third embedded member EM3 is connected to a high potential and the fourth embedded member EM4 is connected to a low potential, a current flows from the third embedded member EM3 through the third wire SW3, the third conductive member PT3, the second left front coil C2B (one end C2BS and the other end C2BE), the fourth conductive member PT4, and the fourth wire SW4 to the fourth embedded member EM4. At this time, a current flows through the second left front coil C2B in the direction indicated by the arrow AR12.

[0059] When the fifth embedded member EM5 is connected to a high potential and the sixth embedded member EM6 is connected to a low potential, a current flows from the fifth embedded member EM5 through the fifth wire SW5, the fifth conductive member PT5, the second left rear coil C2C (one end C2CS and the other end C2CE), the sixth conductive member PT6, and the sixth wire SW6 to the sixth embedded member EM6. At this time, a current flows through the second left rear coil C2C in the direction indicated by the arrow AR13.

[0060] When the eighth embedded member EM8 is connected to a high potential and the seventh embedded member EM7 is connected to a low potential, a current flows from the eighth embedded member EM8 through the eighth wire SW8, the eighth conductive member PT8, the second right rear coil C2D (the other end C2DE and one end C2DS), the seventh conductive member PT7, and the seventh wire SW7 to the seventh embedded member EM7. At this time, a current flows through the second right rear coil C2D in the direction indicated by the arrow AR14.

[0061] As a result, the second right front coil C2A and the second right rear coil C2D are subjected to a downward force (electromagnetic attractive force), and the second left front coil C2B and the second left rear coil C2C are subjected to an upward force (electromagnetic repulsive force), so that the left portion of the movable member MB rises and the right portion falls, causing it to tilt. Note that when the second embedded member EM2, the third embedded member EM3, the fifth embedded member EM5, and the eighth embedded member EM8 are connected to a low potential and the first embedded member EM1, the fourth embedded member EM4, the sixth embedded member EM6, and the seventh embedded member EM7 are connected to a high potential, the second right front coil C2A and the second right rear coil C2D are subjected to an upward force (electromagnetic repulsive force), and the second left front coil C2B and the second left rear coil C2C are subjected to a downward force (electromagnetic attractive force), so that the left portion of the movable member MB falls and the right portion falls, causing it to tilt.

[0062] When the eleventh embedded member EM11 is connected to a high potential and the twelfth embedded member EM12 is connected to a low potential, a current flows from the eleventh embedded member EM11 through the third right front coil C3A (one end C3AS and the other end C3AE) to the twelfth embedded member EM12. At this time, a current flows through the third right front coil C3A in the direction indicated by the arrow AR21.

[0063] When the fourteenth embedded member EM14 is connected to a high potential and the thirteenth embedded member EM13 is connected to a low potential, a current flows from the fourteenth embedded member EM14 through the third left front coil C3B (the other end C3BE and one end C3BS) to the thirteenth embedded member EM13. At this time, a current flows through the third left front coil C3B in the direction indicated by the arrow AR22.

[0064] When the sixteenth embedded member EM16 is connected to a high potential and the fifteenth embedded member EM15 is connected to a low potential, a current flows from the sixteenth embedded member EM16 through the third left rear coil C3C (the other end C3CE and one end C3CS) to the fifteenth embedded member EM15. At this time, a current flows through the third left rear coil C3C in the direction indicated by the arrow AR23.

[0065] When the seventeenth embedded member EM17 is connected to a high potential and the eighteenth embedded member EM18 is connected to a low potential, a current flows from the seventeenth embedded member EM17 through the third right rear coil C3D (one end C3DS and the other end C3DE) to the eighteenth embedded member EM18. At this time, a current flows through the third right rear coil C3D in the direction indicated by the arrow AR24.

[0066] As a result, the third front-right coil C3A and the third rear-left coil C3C receive a force diagonally rearward to the left (Lorentz force), and the third front-left coil C3B and the third rear-right coil C3D receive a force diagonally forward to the left (Lorentz force), causing the movable member MB to move leftward along the Y-axis direction, because the forces along the X-axis direction cancel each other out. Furthermore, when the 11th embedded member EM11, the 14th embedded member EM14, the 16th embedded member EM16, and the 17th embedded member EM17 are connected to a low potential and the 12th embedded member EM12, the 13th embedded member EM13, the 15th embedded member EM15, and the 18th embedded member EM18 are connected to a high potential, the third right front coil C3A and the third left rear coil C3C are subjected to a force diagonally forward to the right (force due to the Lorentz force), and the third left front coil C3B and the third right rear coil C3D are subjected to a force diagonally backward to the right (force due to the Lorentz force), and the movable side member MB moves to the right along the Y-axis direction.

[0067] A control device (not shown) external to the optical device 101 as described above can control the position and attitude (tilt) of the optical element holding member 2 by controlling the voltages applied to each of the first to eighteenth embedded members EM1 to EM18. The control device is composed of, for example, a microcomputer including a CPU, memory, etc., and may detect the position and attitude (tilt) of the optical element holding member 2 using various sensors (not shown), and control the position and attitude (tilt) of the optical element holding member 2 based on the detection results. The control device may be disposed within the optical device 101. Alternatively, the control device may be a component of the optical device 101.

[0068] In this way, the control device can, for example, utilize the driving forces of the first driving unit DM1, the second driving unit DM2, and the third driving unit DM3 to realize translation of the optical element holding member 2 along the X-axis, Y-axis, and Z-axis on the Z1 side of the base member 7, rotation (tilting) of the optical element holding member 2 around the first tilting axis SA1, and rotation (tilting) of the optical element holding member 2 around the second tilting axis SA2.

[0069] In other words, the optical device 101, which has a substantially rectangular parallelepiped shape, is mounted on, for example, an external substrate (not shown). In this case, the first coil C1, the second coil C2, and the third coil C3 are each connected to an external current supply source via the embedded member EM, the substrate SB, and a flexible circuit board (not shown). When current flows through the first coil C1, the second coil C2, and the third coil C3, the first drive unit DM1, the second drive unit DM2, and the third drive unit DM3 each generate an electromagnetic force.

[0070] For example, if the optical element OE is a lens body, the optical device 101 can realize an autofocus function by moving the lens body along the optical axis using an electromagnetic force generated by the first driving unit DM1 along the optical axis. The optical device 101 can also realize a tilt function (image stabilization function) by tilting the lens body using an electromagnetic force generated by the second driving unit DM2 along the coil axis C2X of the second coil C2. The optical device 101 can also realize a shift function (image stabilization function) by moving the lens body along the direction parallel to the XY plane using an electromagnetic force generated by the third driving unit DM3 along the XY plane.

[0071] Next, with reference to FIGS. 10 and 11 , the positional relationships of the components constituting the optical device 101 when the optical device 101 is in a neutral state will be described. The neutral state of the optical device 101 is, for example, a state in which current is supplied to each of the first coil C1, the second coil C2, and the third coil C3, and the movable member MB is located at the center of the movable range in each of three mutually orthogonal axes (X-axis, Y-axis, and Z-axis), i.e., a state in which the movable member MB is in a neutral position. Typically, in the neutral state of the optical device 101, the optical element holding member 2 is located at the center of the movable range in each of the three axes. Both FIGS. 10 and 11 show a top view and a partial cross-sectional view of the optical device 101 in the neutral state. Specifically, the upper view of FIG. 10 is a top view of the optical device 101, and the lower view of FIG. 10 shows a cross-section of the optical device 101 in a virtual plane perpendicular to the XY plane including the cutting line CL1 in the upper view of FIG. 10 . 11 is a top view of the optical device 101, and the lower view of FIG. 11 shows a cross section of the optical device 101 on a virtual plane perpendicular to the XY plane including the cutting line CL2 in the upper view of FIG.

[0072] Specifically, as shown in the lower diagram of Fig. 10, the second coil C2 is disposed in the Z-axis direction at a distance DS1 from the upper surface 6BS of the base 6B of the magnetic member 6. Also, as shown in the lower diagram of Fig. 11, the second coil C2 is disposed so that the height of its lower surface is the same as the height of the lower surface of the first magnet M1 (third magnet M3) and so that the height of its upper surface is the same as the height of the upper surface of the protrusion 6P of the magnetic member 6. Also, the first magnet M1 (third magnet M3) is disposed in the Z-axis direction at a distance GP from the upper surface of the third coil C3.

[0073] In the illustrated example, the dimension (height dimension) of the second coil C2 in the Z-axis direction is smaller than the height dimension of the second magnet M2 as shown in the lower diagram of Figure 10, and is larger than the height dimension of the first magnet M1 (third magnet M3) as shown in the lower diagram of Figure 11.

[0074] The first magnet M1 (third magnet M3) and the second magnet M2 are both arranged so that their upper surfaces contact the lower surface of the magnet holding member 5. The second magnet M2 is also arranged so that its lower surface contacts the upper surface 6BS of the base 6B of the magnetic member 6.

[0075] By having the positional relationship described above, the optical device 101 can tilt the coil holding member 3 that holds the second coil C2 without bringing the second coil C2 into contact with the upper surface 6BS of the base 6B of the magnetic member 6.

[0076] Next, referring to FIG. 12 , an example of the movement of the coil holding member 3 by the second driver DM2 will be described. FIG. 12 is a perspective view of the coil holding member 3 and the fixed member FB that constitute the optical device 101. The fixed member FB includes a magnet holding member 5, a magnetic member 6, a base member 7, a first magnet M1 (third magnet M3), and a second magnet M2. Specifically, the upper view of FIG. 12 shows the state when the coil holding member 3 is tilted around the first tilt axis SA1, the center view of FIG. 12 shows the state when the coil holding member 3 is tilted around the second tilt axis SA2, and the lower view of FIG. 12 shows the state when the coil holding member 3 is tilted around the third tilt axis SA3. Note that, for ease of understanding, FIG. 12 omits illustration of members other than the coil holding member 3 and the fixed member FB. Also, for ease of understanding, a dot pattern is applied to the coil holding member 3 in FIG. 12 .

[0077] Specifically, in the state shown in the upper diagram of FIG. 12 , the control device lowers the right front coil housing 3SA housing the second right front coil C2A and the right rear coil housing 3SD housing the second right rear coil C2D from their respective positions in the neutral state. The control device also raises the left front coil housing 3SB housing the second left front coil C2B and the left rear coil housing 3SC housing the second left rear coil C2C from their respective positions in the neutral state. In this manner, the control device raises the left portion of the coil holding member 3 and lowers the right portion of the coil holding member 3, thereby tilting the coil holding member 3 clockwise in a front view around the first tilting axis SA1. The same applies to tilting the coil holding member 3 counterclockwise in a front view around the first tilting axis SA1.

[0078] 12, the control device lowers the right front coil housing portion 3SA and the left front coil housing portion 3SB from their respective positions in the neutral state, and raises the left rear coil housing portion 3SC and the right rear coil housing portion 3SD from their respective positions in the neutral state. In this manner, the control device lowers the front portion of the coil holding member 3 and raises the rear portion of the coil holding member 3, thereby tilting the coil holding member 3 counterclockwise in a right side view around the second tilting axis SA2. The same applies to the case where the coil holding member 3 is tilted clockwise in a right side view around the second tilting axis SA2.

[0079] 12 , the control device raises the right front coil housing 3SA from its neutral position, keeps the left front coil housing 3SB and the right rear coil housing 3SD in their neutral positions, and lowers the left rear coil housing 3SC from its neutral position. In this way, the control device raises the right front portion of the coil holding member 3 and lowers the left rear portion of the coil holding member 3, thereby tilting the coil holding member 3 clockwise around the third tilting axis SA3 when viewed from the direction along the third tilting axis SA3 (the right side in the lower diagram of FIG. 12 ). The same applies to tilting the coil holding member 3 counterclockwise around the third tilting axis SA3 when viewed from the direction along the third tilting axis SA3. The same applies to the case where the coil holding member 3 is tilted clockwise or counterclockwise around the fourth tilting axis SA4 (see FIG. 2) when viewed from the direction along the fourth tilting axis SA4.

[0080] As described above, the optical device 101 according to the embodiment of the present disclosure includes, as shown in FIG. 3 , a fixed member FB, a movable member MB including an optical element holding member 2 capable of holding a lens body, which is an example of an optical element OE (see FIG. 2 ), and an image sensor IS arranged opposite the lens body in the optical axis direction and an image sensor holding member 4 that is immovable relative to the image sensor IS, and a first drive unit DM1 including at least a first coil C1 held by the optical element holding member 2 and a first magnet M1 facing the first coil C1, and configured to move the optical element holding member 2 in the optical axis direction. The optical device 101 also includes a second drive unit DM2 including at least a second coil C2 held by the movable member MB (coil holding member 3) and a second magnet M2 that applies a magnetic field to the second coil C2, and configured to move the movable member MB relative to the fixed member FB in a direction different from the optical axis direction. The first magnet M1 and the second magnet M2 are immovable relative to each other. In the illustrated example, the first magnet M1 and the second magnet M2 are attached to the fixed member FB (magnet holding member 5) so as to be immovable relative to each other. However, the first magnet M1 and the second magnet M2 may also be attached to the movable member MB so as to be immovable relative to each other.

[0081] This configuration provides the advantage of being able to move the lens body more flexibly using magnets. Furthermore, in this configuration, the first magnet M1 and the second magnet M2 are immovable relative to each other. Therefore, even if the movable member MB moves, the positional relationship between the first magnet M1 and the second magnet M2 remains unchanged, and the positional relationship between the magnetic fields generated by the first magnet M1 and the second magnet M2 also remains unchanged. This provides the advantage of being able to appropriately move the member to be driven without being excessively affected by changes in the magnetic field.

[0082] Preferably, the first magnet M1 and the second magnet M2 are provided on the fixed member FB (magnet holding member 5) so as to be immovable relative to each other, as shown in FIG.

[0083] This configuration has the effect of allowing the lens body to be moved more flexibly, while also providing the effect of simplifying the structure compared to when the first magnet M1 and the second magnet M2 are attached to the movable side member MB so that they cannot move relative to each other.

[0084] 3 , the optical device 101 preferably includes a coil holding member 3 that holds the second coil C2, a first leaf spring LS1 that connects the coil holding member 3 to the fixed-side member FB (magnet holding member 5), and a plurality of suspension wires SW that are provided between the coil holding member 3 and the image sensor holding member 4 and extend in the optical axis direction so that the image sensor holding member 4 can move in accordance with movement of the coil holding member 3 in the optical axis direction. The first leaf spring LS1 is an example of a support member (elastic member) that connects the coil holding member 3 to the fixed-side member FB (magnet holding member 5) and is configured to movably support the coil holding member 3.

[0085] This configuration brings about the effect that the imaging element holding member 4 can be moved together with the coil holding member 3 by the suspension wires SW.

[0086] In addition, the optical device 101 preferably has a second leaf spring LS2 connecting the coil holding member 3 and the optical element holding member 2, and a third leaf spring LS3 connecting the image pickup element holding member 4 and the optical element holding member 2, as shown in Figure 4.

[0087] This configuration has the effect of making it easier to move the optical element holding member 2 and the imaging element holding member 4 together.

[0088] 7, four second coils C2 are preferably arranged around the optical element holder 2 in a plan view along the optical axis direction. Four second magnets M2 are arranged, one between each of the four second coils C2 (second right front coil C2A, second left front coil C2B, second left rear coil C2C, and second right rear coil C2D) arranged to surround the optical element holder 2. Specifically, the second magnets M2 include a second rear magnet M2B, a second front magnet M2F, a second left magnet M2L, and a second right magnet M2R. The second magnet M2 preferably includes a pair of magnets (a second rear magnet M2B and a second front magnet M2F) arranged opposite each other on either side of the optical axis OA in a first direction (X-axis direction) that intersects the optical axis direction, as shown in the upper diagram of Figure 7, and a pair of magnets (a second left-side magnet M2L and a second right-side magnet M2R) arranged opposite each other on either side of the optical axis OA in a second direction (Y-axis direction) that intersects the optical axis direction and is perpendicular to the first direction.

[0089] This configuration provides the effect of enabling the second coil C2 and the second magnet M2 to be arranged with good space efficiency, and preventing the optical device 101 from becoming large.

[0090] Furthermore, each of the second coils C2 preferably has a coil axis C2X along the optical axis direction, as shown in the upper diagram of Figure 7, and a protrusion 6P that constitutes the fixed side member FB (magnetic member 6) and is made of a magnetic material is inserted into the hollow core portion AC that penetrates in the optical axis direction.

[0091] This configuration has the effect of allowing the magnetic field (magnetic flux) generated by the second magnet M2 to cross the second coil C2, thereby increasing the driving force of the second driving unit DM2 compared to when the protrusion 6P is not present.

[0092] 7, the fixed-side member FB preferably includes a magnetic member 6. The magnetic member 6 includes a frame-shaped base 6B to which the second magnet M2 is fixed, and a protrusion 6P that protrudes from the base 6B in the optical axis direction.

[0093] This configuration has the advantage of being able to suppress an increase in the number of parts and improve the productivity of the optical device 101 compared to when the base 6B and the protrusion 6P are formed as separate members. In addition, this configuration has the advantage of being able to make the magnetic member 6 function as a magnetic yoke for guiding the magnetic field (magnetic flux) generated by the second magnet M2.

[0094] Furthermore, in the optical device 101, preferably, as shown in the lower diagram of FIG. 7 , if one side in the optical axis direction is the upper side (Z1 side) and the other side is the lower side (Z2 side), the second magnet M2 is fixed to the upper surface 6BS of the base 6B, and the protrusion 6P protrudes toward the upper side of the base 6B (the Z1 side, i.e., the side where the second magnet M2 is disposed). The second coil C2 is disposed a distance DS1 away from the upper surface 6BS of the base 6B. The second coil C2 and the second magnet M2 are at least partially disposed at the same position in the optical axis direction, with the center CP1 of the second coil C2 in the optical axis direction positioned above the center CP2 of the second magnet M2 in the optical axis direction. In the example shown in the lower diagram of FIG. 7 , the second coil C2 and the second magnet M2 overlap in the optical axis direction by a height range R1, with the center CP1 of the second coil C2 in the optical axis direction positioned above the center CP2 of the second magnet M2 in the optical axis direction by a distance DS2.

[0095] This configuration has the effect of preventing the second coil C2 or the coil holding member 3 from coming into contact with the magnetic member 6 (base 6B) when the second coil C2 and the coil holding member 3 (not shown in FIG. 7) are tilted. This configuration also has the effect of increasing the driving force of the second driving unit DM2 compared to when the center CP1 of the second coil C2 and the center CP2 of the second magnet M2 are at the same height.

[0096] Furthermore, as shown in FIG. 3 , the fixed-side member FB preferably includes a magnet holding member 5 and a magnetic member 6. If one side of the optical axis direction is the upper side (Z1 side) and the other side is the lower side (Z2 side), the upper surface of the first magnet M1 is fixed to the lower surface of the magnet holding member 5, the upper surface of the second magnet M2 is fixed to the lower surface of the magnet holding member 5, and the lower surface of the second magnet M2 is fixed to the upper surface of the magnetic member 6. The magnet holding member 5 is preferably made of a non-magnetic metal or synthetic resin. In this case, the first magnet M1 and the second magnet M2 are preferably fixed to the magnet holding member 5 with an adhesive. However, the magnet holding member 5 may be made of a magnetic member and may be fixed to the magnet holding member 5 by a method other than adhesive bonding.

[0097] This configuration has the effect of suppressing an increase in the dimension of the optical device 101 in the optical axis direction, because the first magnet M1 and the second magnet M2 are disposed at the same height position in at least a part of the height range.

[0098] 3, the optical device 101 preferably includes a third drive unit DM3 that includes at least a third coil C3 and a third magnet M3 facing the third coil C3 and moves the image sensor holding member 4 in a direction intersecting the optical axis relative to the optical element holding member 2. The direction intersecting the optical axis is, for example, a direction substantially perpendicular to the optical axis, such as the X-axis direction or the Y-axis direction. The third coil C3 is provided on the image sensor holding member 4, and the third magnet M3 is provided on the fixed member FB (magnet holding member 5).

[0099] This configuration has the effect of realizing image stabilization for various types of camera shake (movements of the optical element holding member 2) by, for example, moving the optical element holding member 2 along the XY plane, tilting the optical element holding member 2 around a first tilting axis SA1 parallel to the X axis (see the upper diagram in Figure 12), tilting the optical element holding member 2 around a second tilting axis SA2 parallel to the Y axis (see the center diagram in Figure 12), and tilting the optical element holding member 2 around a third tilting axis SA3 along the diagonal line of the optical device 101 (see the lower diagram in Figure 12).

[0100] 3, the third magnet M3 is preferably also used as the first magnet M1. Specifically, the third right front magnet M3A, the third left front magnet M3B, the third left rear magnet M3C, and the third right rear magnet M3D are respectively shared by the first right front magnet M1A, the first left front magnet M1B, the first left rear magnet M1C, and the first right rear magnet M1D. However, the first magnet M1 and the third magnet M3 may be configured as separate, independent members.

[0101] This configuration has the advantage of being able to reduce the number of parts and prevent the optical device 101 from becoming too large, compared to when the first magnet M1 and the third magnet M3 are configured as separate, independent components.

[0102] The preferred embodiments of the present invention have been described above in detail. However, the present invention is not limited to the above-described embodiments. Various modifications and substitutions may be applied to the above-described embodiments without departing from the scope of the present invention. Furthermore, the features described with reference to the above-described embodiments may be combined as appropriate unless technically inconsistent.

[0103] This application claims priority based on Japanese Patent Application No. 2024-134450, filed on August 9, 2024, the entire contents of which are incorporated herein by reference.

[0104]

Claims

1. An optical device comprising: a fixed-side member; a movable-side member including an optical element holding member capable of holding a lens body, and an imaging element holding member arranged so as to be immovable relative to an imaging element positioned so as to face the lens body in the optical axis direction; and a first drive unit including at least a first coil held by the optical element holding member and a first magnet facing the first coil, and moving the optical element holding member in the optical axis direction; and a second drive unit including at least a second coil held by the movable-side member and a second magnet that applies a magnetic field to the second coil, and moving the movable-side member in a direction different from the optical axis direction relative to the fixed-side member, wherein the first magnet and the second magnet are arranged so as not to be movable relative to each other.

2. The optical device according to claim 1, wherein the first magnet and the second magnet are provided on the fixed member so as to be immovable relative to each other.

3. An optical device as described in claim 2, comprising: a coil holding member that holds the second coil; a first leaf spring that connects the coil holding member and the fixed side member; and a plurality of suspension wires that are provided between the coil holding member and the image sensor holding member and extend in the optical axis direction so that the image sensor holding member can move in accordance with movement of the coil holding member in the optical axis direction.

4. The optical device according to claim 3, further comprising: a second leaf spring connecting the coil holding member and the optical element holding member; and a third leaf spring connecting the imaging element holding member and the optical element holding member.

5. An optical device as described in claim 3 or claim 4, wherein four of the second coils are arranged around the optical element holding member in a plan view along the optical axis direction, and four second magnets are arranged, one between each of the four second coils arranged to surround the optical element holding member, and the second magnets include a pair of magnets arranged opposite each other across the optical axis in a first direction intersecting the optical axis direction, and a pair of magnets arranged opposite each other across the optical axis in a second direction intersecting the optical axis direction and perpendicular to the first direction.

6. An optical device as described in claim 5, wherein each of the second coils has a coil axis along the optical axis direction, and a protrusion made of a magnetic material that constitutes the fixed side member is inserted into a hollow core portion that passes through in the optical axis direction.

7. The optical device according to claim 6, wherein the fixed member has a magnetic member, and the magnetic member has a base to which the second magnet is fixed, and the protrusion protruding from the base in the optical axis direction.

8. The optical device described in claim 7, wherein, assuming one side in the optical axis direction to be the upper side and the other side to be the lower side, the second magnet is fixed to the upper surface of the base, the protrusion protrudes upward from the base, the second coil is positioned away from the upper surface of the base, and the second coil and the second magnet are at least partially positioned at the same position in the optical axis direction, with the center of the second coil in the optical axis direction being positioned above the center of the second magnet in the optical axis direction.

9. An optical device as claimed in any one of claims 1 to 4, wherein the fixed side member has a magnet holding member and a magnetic member, and when one side in the optical axis direction is the upper side and the other is the lower side, the upper surface of the first magnet is fixed to the lower surface of the magnet holding member, the upper surface of the second magnet is fixed to the lower surface of the magnet holding member, and the lower surface of the second magnet is fixed to the magnetic member.

10. An optical device as described in claim 3 or claim 4, comprising a third drive unit that includes at least a third coil and a third magnet facing the third coil and that moves the image pickup element holding member relative to the optical element holding member in a direction intersecting the optical axis, wherein the third coil is provided on the image pickup element holding member, and the third magnet is provided on the fixed side member.

11. The optical device according to claim 10, wherein the third magnet is also used as the first magnet.

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