Lens drive device

Abstract

The present invention provides a lens driving device capable of suppressing the tilt of the optical axis of a lens body. The lens driving device (101) includes a driving mechanism (DM) that moves a lens holding component (7) relative to a fixed side component (FB). The driving mechanism includes a magnetic component (MG) having a magnetic field generating component (10) and a yoke (9) and supported by a supporting component (SM) so as to be movable, and a coil (11) provided on the fixed side component in a manner opposite to the magnetic field generating component. The driving mechanism is configured to move the magnetic component in the direction of the optical axis by energizing the coil. The coil includes a left coil (11L) and a right coil (11R) that can be energized independently. The lens holding component is connected to a left connecting component (8L) fixed to a left magnetic component (MGL) at a first position, and is connected to a right connecting component (8R) fixed to a right magnetic component (MGR) at a second position. The first position and the second position are opposite to each other across the optical axis (OA).

Description

Technical Field

[0001] The present disclosure relates to a lens driving device mounted on, for example, a portable device equipped with a camera. Background Art

[0002] Conventionally, there is known a lens holder driving device (lens driving device) including a lens holder supported by an upper leaf spring and a lower leaf spring so as to be movable in the optical axis direction (see Patent Document 1).

[0003] This lens driving device is configured to move a lens holder in the optical axis direction relative to a base member using a VCM (Voice Coil Motor) type driving mechanism composed of a driving coil, a yoke, and a permanent magnet.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 204-017977 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] However, in the above-mentioned lens driving device, the lens holder may be tilted depending on its posture, and the optical axis of the lens body may be tilted.

[0009] Therefore, it is desirable to provide a lens driving device that can suppress the tilt of the optical axis of the lens body.

[0010] Solutions for solving problems

[0011] The lens driving device of one embodiment of the present invention comprises: a fixed side component; a lens holding component capable of holding a lens body; a movable side component including the lens holding component; and a driving mechanism that causes the lens holding component to move at least in the optical axis direction relative to the fixed side component, the lens driving device being characterized in that the driving mechanism has at least two driving parts including a first driving part and a second driving part arranged in a manner opposite to each other across the optical axis, the first driving part comprising: a first magnetic part having a first magnetic field generating part and a first magnetic yoke, and being supported by a supporting part so as to be movable in the optical axis direction; and a first coil provided on the fixed side component in a manner opposite to the first magnetic field generating part, and the first driving part is configured to move in the optical axis direction by moving the first coil toward the first magnetic field generating part. When the coil is energized, the first magnetic component moves in the direction of the optical axis, and the second driving part comprises: a second magnetic component, which has a second magnetic field generating component and a second yoke, and is supported by the supporting component so as to be movable in the direction of the optical axis; and a second coil, which is arranged on the fixed side component in a manner opposite to the second magnetic field generating component, and the second driving part is configured to move the second magnetic component in the direction of the optical axis by energizing the second coil, and the first coil and the second coil can be energized independently, and the lens holding component is connected to the first connecting component fixed to the first magnetic component at the first position, and is connected to the second connecting component fixed to the second magnetic component at the second position, and the first position and the second position are opposite to each other across the optical axis.

[0012] Effects of the Invention

[0013] The lens driving device described above can suppress the tilt of the optical axis of the lens body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A It is a top perspective view of the lens drive device.

[0015] Figure 1B This is a perspective view from above of the lens drive device with the cover removed.

[0016] Figure 2 This is an exploded perspective view of the lens drive device.

[0017] Figure 3A This is a top perspective view of the movable side member.

[0018] Figure 3B This is an exploded perspective view of the movable side member.

[0019] Figure 4A This is a top perspective view of the coil assembly.

[0020] Figure 4B This is an exploded perspective view of the coil assembly.

[0021] Figure 5A This is a top perspective view of the movable side member to which the support member is attached.

[0022] Figure 5B This is a bottom perspective view of the movable side member to which the support member is attached.

[0023] Figure 6A This is an upper perspective view of the coil holding member to which the support member that supports the movable-side member is attached.

[0024] Figure 6B This is a bottom perspective view of the coil holding member to which the support member that supports the movable-side member is attached.

[0025] Figure 7A This is a top perspective view of the coil holding member to which the coil assembly is mounted.

[0026] Figure 7B This is a bottom perspective view of the coil holding member to which the coil assembly is mounted.

[0027] Figure 8A It is a top view of the right drive unit.

[0028] Figure 8B It is a left side view of the right drive unit.

[0029] Figure 8C It is a bottom view of the right drive unit.

[0030] Figure 9A It is a front view of the right drive unit.

[0031] Figure 9B It is a right side view of the right drive unit.

[0032] Figure 9C This is a rear view of the right drive unit.

[0033] Figure 10 It is a cross-sectional view of the right drive unit.

[0034] Figure 11A This is a right side view of the right yoke, right magnetic field generating member, right coil, and right magnetic field detecting member when the lens driving device is in an initial state.

[0035] Figure 11B This is a right side view of the right yoke, right magnetic field generating member, right coil, and right magnetic field detecting member when the right yoke and the right magnetic field generating member are moving downward.

[0036] Figure 11C This is a right side view of the right yoke, right magnetic field generating member, right coil, and right magnetic field detecting member when the right yoke and the right magnetic field generating member are moving upward.

[0037] Figure 12AThis is a front view of the lens holding member, the connecting member, and the yoke.

[0038] Figure 12B This is a front view of the lens holding member, the connecting member, and the yoke when the optical axis is tilted.

[0039] Figure 13A This is a top view of the base component, coil holding component, and yoke.

[0040] Figure 13B This is a top perspective view of the base component, coil holding component, and yoke.

[0041] Figure 14A This is a perspective view of the yoke with the workpiece attached.

[0042] Figure 14B This is a perspective view of a yoke with a connecting member attached.

[0043] Figure 14C This is a perspective view of a yoke to which a connecting member and a magnetic field generating member are attached.

[0044] Figure 14D This is a perspective view of a yoke to which a connecting member, a magnetic field generating member, and an adhesive are attached.

[0045] Figure 15A This is a top view of the coil holding component and coil.

[0046] Figure 15B This is a cross-sectional view of the coil holding component and coil. DETAILED DESCRIPTION

[0047] Hereinafter, a lens driving device 101 according to an embodiment of the present invention will be described with reference to the drawings. Figure 1A and Figure 1B 1 is a perspective view of the lens driving device 101. Specifically, Figure 1A This is a top perspective view of the lens driving device 101 with the cover member 1 mounted thereon. Figure 1B It is an upper perspective view of the lens driving device 101 with the cover member 1 removed. Figure 2 It is an exploded perspective view of the lens driving device 101 .

[0048] exist Figure 1A, X1 represents one direction of the X-axis constituting the three-dimensional orthogonal coordinate system, and X2 represents the other direction of the X-axis. In addition, Y1 represents one direction of the Y-axis constituting the three-dimensional orthogonal 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 orthogonal coordinate system, and Z2 represents the other direction of the Z-axis. In this embodiment, the optical axis OA extends parallel to the Z-axis. Moreover, the X1 side of the lens drive device 101 corresponds to the front side (front side) of the lens drive device 101, and the X2 side of the lens drive device 101 corresponds to the rear side (back side) of the lens drive device 101. In addition, the Y1 side of the lens drive device 101 corresponds to the left side of the lens drive device 101, and the Y2 side of the lens drive device 101 corresponds to the right side of the lens drive device 101. In addition, the Z1 side of the lens drive device 101 corresponds to the upper side of the lens drive device 101, and the Z2 side of the lens drive device 101 corresponds to the lower side of the lens drive device 101. The same applies to other figures.

[0049] The lens driving device 101 is a device for driving a lens (not shown). In this embodiment, the lens driving device 101 is configured to move the lens along the optical axis using a driving mechanism DM. The optical axis direction includes the direction relative to the optical axis OA of the lens and the direction parallel to the optical axis OA.

[0050] like Figure 1B As shown, the drive mechanism DM includes a left drive unit DML as a first drive unit and a right drive unit DMR as a second drive unit. The left drive unit DML and the right drive unit DMR are arranged to face each other across the optical axis OA. In this embodiment, the left drive unit DML and the right drive unit DMR have the same shape and are arranged to be bilaterally symmetrical when viewed from above.

[0051] The cover member 1 functions as a frame HS that covers the various components. In this embodiment, the cover member 1 and the base member 2 together form the frame HS. The frame HS is part of the fixed-side member FB. The cover member 1 is manufactured by performing processes such as punching and drawing on a sheet of non-magnetic metal such as austenitic stainless steel.

[0052] Specifically, the cover part 1 has a rectangular cylindrical outer wall portion 1A, a rectangular ring-shaped and flat upper plate portion 1B continuously provided with the upper end (end on the Z1 side) of the outer wall portion 1A, a cylindrical wall portion 1C extending upward from the inner edge of the upper plate portion 1B, and a circular annular plate portion 1D continuously provided with the upper end (end on the Z1 side) of the cylindrical wall portion 1C. A circular opening 1K is formed in the center of the circular annular plate portion 1D. 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 are opposite to each other, and the second side plate portion 1A2 and the fourth side plate portion 1A4 are opposite to each other. In addition, the first side plate portion 1A1 and the third side plate portion 1A3 extend perpendicularly relative to the second side plate portion 1A2 and the fourth side plate portion 1A4. In addition, the upper plate portion 1B is not limited to a flat plate shape, and may also have a concave portion or a convex portion. In addition, the cylindrical wall portion 1C and the annular plate portion 1D may be omitted.

[0053] Next, refer to Figure 2 Each component housed in the housing HS will be described. Figure 2 It is an exploded perspective view of the lens driving device 101 .

[0054] like Figure 2 As shown, the lens driving device 101 includes a movable member MB, a fixed member FB, and a support member SM disposed between the movable member MB and the fixed member FB and supporting the movable member MB so as to be movable relative to the fixed member FB along the optical axis.

[0055] The movable side member MB is a member configured to be movable relative to the fixed side member FB. Figure 2 In the example shown, the movable member MB includes a lens holding member 7 , a coupling member 8 , and a magnetic member MG. The magnetic member MG includes a yoke 9 and a magnetic field generating member 10 .

[0056] Here, refer to Figure 3A and Figure 3B The movable-side member MB will be described in detail. Figure 3A and Figure 3B : is a diagram showing a structural example of the movable side member MB. Specifically, Figure 3A This is a perspective view of the movable side member MB. Figure 3B It is an exploded perspective view of the movable side member MB.

[0057] The lens holding member 7 is configured to hold a lens body. The lens body is, for example, a cylindrical lens barrel having at least one lens. The lens body may also be a liquid lens.

[0058] In this embodiment, the lens retaining member 7 is manufactured by injection molding a synthetic resin such as liquid crystal polymer (LCP). Specifically, the lens retaining member 7 includes a cylindrical portion 7P having a circular inner side and an octagonal outer side cross-section when viewed from above. The lens body (not shown) is embedded within the cylindrical portion 7P and secured to the lens retaining member 7 using an adhesive disposed between the inner circumference of the cylindrical portion 7P and the outer circumference of the lens body.

[0059] like Figure 3A As shown in FIG, a protrusion 7T is formed at the upper end of the lens holding member 7 so as to protrude radially outward from the cylindrical portion 7P. Figure 3B As shown, the protrusion 7T is formed with a through-hole 7H for receiving the upper end of the connecting member 8. Specifically, the protrusion 7T includes a left protrusion 7TL that protrudes to the left (Y1 direction) and a right protrusion 7TR that protrudes to the right (Y2 direction). Furthermore, the through-hole 7H includes a left through-hole 7HL formed in the left protrusion 7TL and a right through-hole 7HR formed in the right protrusion 7TR.

[0060] The magnetic component MG is a component that constitutes the drive mechanism DM. The drive mechanism DM is configured to enable the movable side component MB to move relative to the fixed side component FB along the optical axis. In this embodiment, as shown in Figure 3, the magnetic component MG includes a yoke 9 and a magnetic field generating component 10. Specifically, the magnetic component MG includes a left magnetic component MGL that constitutes the left drive unit DML and a right magnetic component MGR that constitutes the right drive unit DMR. In addition, the left magnetic component MGL includes a left yoke 9L and a left magnetic field generating component 10L, and the right magnetic component MGR includes a right yoke 9R and a right magnetic field generating component 10R.

[0061] The connecting component 8 is a component for connecting the lens holding component 7 and the magnetic component MG. In the example shown in Figure 3, the connecting component 8 is a plate-shaped metal component (leaf spring) that can be elastically deformed. Specifically, the connecting component 8 includes a left connecting component 8L and a right connecting component 8R. The upper end portion of the left connecting component 8L is inserted into the left through-hole 7HL formed in the left protrusion 7TL of the lens holding component 7 and is fixed to the left protrusion 7TL using an adhesive AD1. Similarly, the upper end portion of the right connecting component 8R is inserted into the right through-hole 7HR formed in the right protrusion 7TR of the lens holding component 7 and is fixed to the right protrusion 7TR using an adhesive AD1. In addition, the left connecting component 8L is fixed to the left magnetic yoke 9L by welding, and the right connecting component 8R is fixed to the right magnetic yoke 9R by welding. Figure 3BThe dotted line graph G8 in FIG. 1 shows the position of connecting member 8 when attached to yoke 9. Specifically, graph G8 includes graph G8L and graph G8R. Graph G8L shows the position of left connecting member 8L when attached to left yoke 9L, and graph G8R shows the position of right connecting member 8R when attached to right yoke 9R.

[0062] The yoke 9 is a member that constitutes a magnetic circuit together with the magnetic field generating member 10. In the example shown in Fig. 3 , the yoke 9 is produced by punching and bending a plate made of a soft magnetic material such as iron.

[0063] Specifically, the yoke 9 includes an inner plate 9i located closer to the optical axis OA, an outer plate 9e located opposite the inner plate 9i and farther from the optical axis OA, and a connecting portion 9c connecting the upper ends of the inner plate 9i and the outer plate 9e. Specifically, the left yoke 9L includes a left inner plate 9iL located closer to the optical axis OA, a left outer plate 9eL located opposite the left inner plate 9iL and farther from the optical axis OA, and a left connecting portion 9cL connecting the upper ends of the left inner plate 9iL and the left outer plate 9eL. Similarly, the right yoke 9R includes a right inner plate 9iR located closer to the optical axis OA, a right outer plate 9eR located opposite the right inner plate 9iR and farther from the optical axis OA, and a right connecting portion 9cR connecting the upper ends of the right inner plate 9iR and the right outer plate 9eR.

[0064] The magnetic field generating member 10 is a member that forms a magnetic circuit together with the yoke 9. In the example shown in Fig. 3 , the magnetic field generating member 10 is formed of a permanent magnet with a two-pole magnetization.

[0065] Specifically, the magnetic field generating unit 10 includes a left magnetic field generating unit 10L and a right magnetic field generating unit 10R. The left magnetic field generating unit 10L is composed of two permanent magnets (an upper left magnet 10LU and a lower left magnet 10LD), and the right magnetic field generating unit 10R is composed of two permanent magnets (an upper right magnet 10RU and a lower right magnet 10RD).

[0066] exist Figure 3B In the figure, for clarity, the north pole portion of each of the upper left magnet 10LU, the lower left magnet 10LD, the upper right magnet 10RU, and the lower right magnet 10RD is marked with a cross pattern, and the south pole portion of each is marked with a dot pattern. The same applies to the other figures showing the polarity of each of the upper left magnet 10LU, the lower left magnet 10LD, the upper right magnet 10RU, and the lower right magnet 10RD.

[0067] like Figure 3AAs shown, the left magnetic field generating component 10L is fixed to the inner surface of the left inner plate 9iL of the left magnetic yoke 9L (the surface on the side opposite to the left outer plate 9eL) by means of an adhesive, and the right magnetic field generating component 10R is fixed to the inner surface of the right inner plate 9iR of the right magnetic yoke 9R (the surface on the side opposite to the right outer plate 9eR) by means of an adhesive.

[0068] like Figure 2 As shown, the fixed-side member FB includes a cover member 1 , a base member 2 , a coil holding member 6 , and a coil assembly CA.

[0069] The base member 2 is manufactured by injection molding of a synthetic resin such as a liquid crystal polymer. Figure 2 As shown, the base member 2 is a member having a rectangular frame-shaped outer shape, and a substantially circular opening 2K is formed in the center.

[0070] like Figure 1A As shown, the inner surface of the outer peripheral wall portion 1A of the cover member 1 located near the lower end is combined and positioned with the outer peripheral side surface of the base member 2. The base member 2 is fixed to the cover member 1 using adhesive ADO, and together with the cover member 1, it forms the frame HS.

[0071] The coil holding member 6 is configured to hold the coil assembly CA. In this embodiment, the coil holding member 6 is manufactured by injection molding using a synthetic resin such as a liquid crystal polymer. Specifically, Figure 2 As shown, the coil holding member 6 has a rectangular frame-shaped outer shape, and a substantially rectangular opening 6K is formed in the center.

[0072] Here, the details of the coil assembly CA held by the coil holding member 6 will be described with reference to FIG4. FIG4 is a diagram showing an example of the structure of the coil assembly CA. Specifically, Figure 4A This is a three-dimensional diagram of the coil assembly CA. Figure 4B 1 is an exploded perspective view of the coil assembly CA. The coil assembly CA includes a circuit board 3 , a coil 11 , a magnetic detection member 12 , a capacitor 13 , and a reinforcement member 14 .

[0073] The circuit substrate 3 is a substrate having a wiring pattern formed thereon. This wiring pattern is used to connect the coil 11, magnetic detection component 12, capacitor 13, and the like to an external control device (not shown). In the example shown in FIG4 , the circuit substrate 3 is a flexible printed circuit substrate configured to be repeatedly deformable. However, the circuit substrate 3 may also be a rigid circuit substrate.

[0074] Specifically, the circuit substrate 3 includes a left extension portion 3L extending along the first side plate portion 1A1 of the outer peripheral wall portion 1A of the cover member 1, a rear extension portion 3B extending along the second side plate portion 1A2, and a right extension portion 3R extending along the third side plate portion 1A3. Alternatively, the left extension portion 3L, the rear extension portion 3B, and the third side plate portion 1A3 may be configured as separate circuit substrates.

[0075] The coil 11 is formed by winding a conductive (metal) wire (conducting wire). In the example shown in Figure 4, the coil 11 includes a winding portion 11m, which is a coil main body formed by winding into a roughly octagonal ring shape, and a first extension portion 11s and a second extension portion 11e, which extend from the winding portion 11m and are soldered to the circuit board 3. In Figure 4, for the sake of clarity, the detailed winding state of the conductive wire whose surface is covered by an insulating member is omitted from the winding portion 11m. That is, the winding portion 11m is simplified. The same applies to the other figures showing the winding portion 11m. The first extension portion 11s is connected to the end (winding start portion) of the winding portion 11m located on the inner circumference side of the winding portion 11m on the winding start side of the coil 11. The second extension portion 11e is connected to the end (winding end portion) of the winding portion 11m located on the outer circumference side of the winding portion 11m on the winding end side of the coil 11.

[0076] Specifically, the coil 11 includes a left coil 11L mounted on the left extension portion 3L of the circuit board 3 and a right coil 11R mounted on the right extension portion 3R of the circuit board 3. The left coil 11L includes a left winding portion 11mL, a first left extension portion 11sL, and a second left extension portion 11eL. The right coil 11R includes a right winding portion 11mR, a first right extension portion 11sR, and a second right extension portion 11eR. The first right extension portion 11sR is soldered with solder SD1 (see Figure 4A ) is fixed to the first conductor pad PD1 in the right extension portion 3R of the circuit substrate 3, and the second right extension portion 11eR is fixed to the first conductor pad PD1 in the right extension portion 3R of the circuit substrate 3 by solder SD2 (refer to Figure 4A ) is fixed to the second conductor pad PD2 in the right extension portion 3R of the circuit board 3. Similarly, the first left extension portion 11sL and the second left extension portion 11eL are fixed to the conductor pad (not visible in FIG. 4 ) in the left extension portion 3L of the circuit board 3.

[0077] More specifically, if Figure 4A As shown, the coil 11 is formed to have a coil axis 11x extending in a direction perpendicular to the optical axis. That is, the left winding portion 11mL of the left coil 11L has a left coil axis 11xL extending in a direction perpendicular to the optical axis, and the right winding portion 11mR of the right coil 11R has a right coil axis 11xR extending in a direction perpendicular to the optical axis.

[0078] The magnetic detection component 12 is configured to detect the magnetism generated by the magnetic field generating component 10. In the example shown in FIG4 , the magnetic detection component 12 is configured to detect the position of the movable side component MB (magnetic component MG) using a Hall element. However, the magnetic detection component 12 may also be configured to detect the position of the movable side component MB (magnetic component MG) using a magnetoresistive element such as a giant magnetoresistive effect (GMR) element, a semiconductor magnetoresistive (SMR) element, an anisotropic magnetoresistive (AMR) element, or a tunnel magnetoresistive (TMR) element that can detect the magnetic field generated by a magnet.

[0079] Specifically, the magnetic detection component 12 includes: a left magnetic detection component 12L, which is used to receive magnetism from the left magnetic field generating component 10L and detect the position of the left magnetic component MGL in the direction of the optical axis; and a right magnetic detection component 12R, which is used to receive magnetism from the right magnetic field generating component 10R and detect the position of the right magnetic component MGR in the direction of the optical axis.

[0080] The left magnetic detection member 12L is disposed in the left winding portion 11mL of the left coil 11L and fixed to the left extension portion 3L of the circuit board 3. Similarly, the right magnetic detection member 12R is disposed in the right winding portion 11mR of the right coil 11R and fixed to the right extension portion 3R of the circuit board 3.

[0081] Capacitor 13 is a bypass capacitor that connects the power line to the ground line. In the example shown in Figure 4, capacitor 13 includes a left capacitor 13L and a right capacitor 13R. Left capacitor 13L is located within the left winding portion 11mL of the left coil 11L and is fixed to the left extension portion 3L of the circuit board 3. Similarly, right capacitor 13R is located within the right winding portion 11mR of the right coil 11R and is fixed to the right extension portion 3R of the circuit board 3.

[0082] An adhesive may be applied inside the winding portion 11m. In this case, the magnetic detection member 12 and the capacitor 13 may be embedded in the adhesive applied inside the winding portion 11m.

[0083] The reinforcing member 14 is a member for reinforcing the circuit board 3. In the example shown in Fig. 4 , the reinforcing member 14 is a plate-shaped member formed of stainless steel and includes a rear reinforcing member 14B, a left reinforcing member 14L, and a right reinforcing member 14R.

[0084] Specifically, the reinforcing member 14 includes a rear reinforcing member 14B fixed to the rear extension 3B of the circuit board 3 with an adhesive, a left reinforcing member 14L fixed to the left extension 3L of the circuit board 3 with an adhesive, and a right reinforcing member 14R fixed to the right extension 3R of the circuit board 3 with an adhesive. In the example shown in FIG4 , the rear reinforcing member 14B may be omitted.

[0085] The left extension portion 3L and the right extension portion 3R of the circuit board 3 are formed with circular holes RH1 for receiving guide pins for positioning the coil 11 when the coil 11 is fixed to the circuit board 3. Similarly, the left reinforcement member 14L and the right reinforcement member 14R are also formed with circular holes RH2 for receiving the guide pins.

[0086] Here, refer to Figure 2 7, the details of the support member SM will be described. FIG5 is a perspective view of the movable side member MB to which the support member SM is mounted. Specifically, Figure 5A This is a top perspective view of the movable side member MB with the support member SM installed. Figure 5B FIG6 is a perspective view of the coil holding member 6 mounted with the supporting member SM supporting the movable side member MB. Specifically, Figure 6A This is an upper perspective view of the coil holding member 6 to which the supporting member SM supporting the movable side member MB is mounted. Figure 6B FIG7 is a perspective view of the coil holding member 6 mounted with the support member SM supporting the movable side member MB. FIG7 is a perspective view of the coil holding member 6 mounted with the coil assembly CA. Specifically, Figure 7A This is an upper perspective view of the coil holding component 6 to which the coil assembly CA is mounted. Figure 7B 6 and 7 , the coil holding member 6 is shown in a bottom perspective view with the coil assembly CA mounted thereon.

[0087] In this embodiment, the support member SM is made of a metal plate whose main material is copper alloy. Figure 2 As shown, the supporting part SM includes an upper leaf spring 4 arranged between the upper part of the movable side part MB (magnetic yoke 9) and the upper part of the fixed side part FB (coil holding part 6), and a lower leaf spring 5 arranged between the lower part of the movable side part MB (magnetic field generating part 10) and the lower part of the fixed side part FB (coil holding part 6).

[0088] Figure 2The dotted line graph G4 shows the position of the upper leaf spring 4 when attached to the yoke 9. Specifically, the graph G4 includes a graph G4L and a graph G4R. Graph G4L shows the position of the upper leaf spring 4 (the left inner portion 4iL) when attached to the left yoke 9L, while graph G4R shows the position of the upper leaf spring 4 (the right inner portion 4iR) when attached to the right yoke 9R.

[0089] Figure 2 The dotted line in the figure G10 shows the position of the magnetic field generating component 10 when attached to the lower leaf spring 5. Specifically, the figure G10 includes a figure G10L and a figure G10R. The figure G10L shows the position of the left magnetic field generating component 10L (lower left magnet 10LD) when attached to the lower leaf spring 5 (left inner portion 5iL), while the figure G10R shows the position of the right magnetic field generating component 10R (lower right magnet 10RD) when attached to the lower leaf spring 5 (right inner portion 5iR).

[0090] As shown in FIG6 , when the coil holding member 6 , the movable member MB, and the support member SM are combined, the support member SM supports the movable member MB so that the movable member MB can move relative to the coil holding member 6 in the optical axis direction (Z-axis direction).

[0091] like Figure 5A As shown, the upper leaf spring 4 has a generally rectangular ring-shaped outer shape when viewed from above. Furthermore, the upper leaf spring 4 includes an inner portion 4i serving as a first support portion (movable-side support portion) fixed to the movable-side member MB (yoke 9), an outer portion 4e serving as a second support portion (fixed-side support portion) fixed to the fixed-side member FB (coil holding member 6), an elastic arm portion 4g positioned between the inner portion 4i and the outer portion 4e, and a grid portion 4r connecting the two outer portions 4e.

[0092] More specifically, the inner portion 4i includes a left inner portion 4iL fixed to the left yoke 9L and a right inner portion 4iR fixed to the right yoke 9R.

[0093] like Figure 6A As shown, the outer portion 4e of the upper leaf spring 4 is placed on the end surface (upper surface) of the four corners of the coil holding member 6 on the subject side (Z1 side). Figure 7A As shown, four base portions 6P extending in the vertical direction are provided at the four corners of the coil holding member 6. Furthermore, protrusions 6T protruding upward are provided on the end faces (upper surfaces) of the four base portions 6P on the side of the photographed object (Z1 side). The protrusions 6T are inserted into the through holes 4H (see FIG. 4 ) provided on the outer portion 4e of the upper leaf spring 4. Figure 5A ). And, if Figure 6A As shown, the protrusion 6T is heat-riveted and fixed to the outer portion 4e. Figure 6A and Figure 7A In the figure, the protrusion 6T is shown in a state where the front end is deformed after hot caulking. The same is true in other figures showing the protrusion 6T. In addition, the protrusion 6T can also be subjected to cold caulking.

[0094] The inner portion 4i of the upper leaf spring 4 is placed on the connecting portion 9c of the yoke 9 (see Figure 3B ) on. Moreover, the inner portion 4i is fixed to the connecting portion 9c of the yoke 9 by welding. Specifically, as Figure 5A As shown, the left inner portion 4iL is welded to the upper surface of the left connecting portion 9cL of the left yoke 9L, and the right inner portion 4iR is welded to the upper surface of the right connecting portion 9cR of the right yoke 9R.

[0095] like Figure 5B As shown, the lower leaf spring 5 has a generally rectangular ring-shaped outer shape when viewed from above. Furthermore, the lower leaf spring 5 includes an inner portion 5i serving as a first support portion (movable-side support portion) fixed to the movable-side member MB (magnetic field generating member 10), an outer portion 5e serving as a second support portion (fixed-side support portion) fixed to the fixed-side member FB (coil holding member 6), an elastic arm portion 5g positioned between the inner portion 5i and the outer portion 5e, and a grid portion 5r connecting the two outer portions 5e.

[0096] More specifically, the inner portion 5i includes a left inner portion 5iL fixed to the left magnetic field generating member 10L, and a right inner portion 5iR fixed to the right magnetic field generating member 10R.

[0097] The outer portion 5e of the lower leaf spring 5 is placed on the end surface (lower surface) on the imaging element side (Z2 side) of the four base portions 6P provided at the four corners of the coil holding member 6. Figure 7B As shown, four recessed portions 6R are provided on the end surfaces (lower surfaces) of the four base portions 6P on the imaging element side (Z2 side) and are recessed upward (Z1 direction). Figure 6B As shown, the outer portion 5e is fixed to the coil holding member 6 by the adhesive AD2 applied to the recessed portion 6R.

[0098] like Figure 5B As shown in FIG. 1 , the inner portion 5i of the lower leaf spring 5 is placed on the magnetic field generating member 10. Furthermore, the inner portion 5i is fixed to the magnetic field generating member 10 using an adhesive. Specifically, Figure 5B As shown, the left inner portion 5iL is bonded and fixed to the lower surface of the left lower magnet 10LD of the left magnetic field generating component 10L, and the right inner portion 5iR is bonded and fixed to the lower surface of the right lower magnet 10RD of the right magnetic field generating component 10R.

[0099] like Figure 6AAs shown, the upper leaf spring 4 is formed to have twofold rotational symmetry about the optical axis OA. Furthermore, the upper leaf spring 4 is fixed to the movable member MB (yoke 9) at its inner portion 4i and to the upper portion of the coil holding member 6 at its outer portion 4e. Therefore, the upper leaf spring 4 can support the movable member MB (lens holding member 7) in a well-balanced manner relative to the coil holding member 6.

[0100] Likewise, if Figure 6B As shown, the lower leaf spring 5 is formed to have twofold rotational symmetry about the optical axis OA. Furthermore, the lower leaf spring 5 is fixed to the movable member MB (magnetic field generating member 10) at its inner portion 5i and to the lower portion of the coil holding member 6 at its outer portion 5e. Therefore, the lower leaf spring 5 can support the movable member MB (lens holding member 7) with good balance relative to the coil holding member 6.

[0101] The lens driving device 101 typically has the following Figure 1A The camera module is a roughly rectangular parallelepiped device (not shown) mounted on an external substrate (not shown) on which an image sensor (not shown) is mounted. The external substrate, lens drive device 101, a lens body mounted on the movable member MB, and the image sensor mounted on the external substrate so as to face the lens body constitute a camera module. Coil 11 is connected to a current supply source via circuit board 3. When current flows through coil 11, drive mechanism DM generates an electromagnetic force along the optical axis.

[0102] The lens drive device 101 utilizes this electromagnetic force to move the movable member MB (lens holding member 7) along the optical axis on the Z1 side (subject side) of the image sensor, thereby realizing an autofocus function (autofocus function). Specifically, the lens drive device 101 can move the movable member MB (lens holding member 7) away from the image sensor for macro photography, and can move the movable member MB (lens holding member 7) toward the image sensor for infinity photography.

[0103] Next, referring to FIG8~ Figure 10 , the details of the driving mechanism DM will be described. FIG8 and FIG9 are diagrams showing a structural example of the right driving unit DMR as one of the driving mechanisms DM. Specifically, Figure 8A This is a top view of the right drive unit DMR. Figure 8B This is the left view of the right drive unit DMR. Figure 8C This is a bottom view of the right drive unit DMR. Figure 9A This is the main view of the right drive unit DMR. Figure 9B This is the right view of the right drive unit DMR. Figure 9C This is a rear view of the right drive unit DMR. Figure 10As shown by the arrow, the Figure 8A A cross-sectional view of the right drive unit DMR when the single-dot chain line L1 is parallel to the XZ plane. In Figures 8 and 9, for the sake of clarity, a dense cross pattern is given to the N-pole portion of each of the upper right magnet 10RU and the lower right magnet 10RD, a dot pattern is given to the S-pole portion of each, and a sparse cross pattern is given to the right coil 11R. Figure 10 , for the sake of clarity, the right magnetic field generating member 10R is indicated by a dotted line. Note that the following description relates to the right drive unit DMR, but is also applicable to the left drive unit DML.

[0104] As shown in FIG8 and FIG9 , the right driving unit DMR constituting the driving mechanism DM includes a right yoke 9R, a right magnetic field generating member 10R, and a right coil 11R.

[0105] The right drive unit DMR is configured to generate a driving force (thrust) using the magnetic field generated by the right magnetic field generating member 10R and the current flowing through the right coil 11R to move the right yoke 9R fixed to the right magnetic field generating member 10R vertically along the optical axis.

[0106] The right magnetic field generating member 10R (the upper right magnet 10RU and the lower right magnet 10RD) has a substantially rectangular parallelepiped shape as shown in FIG3. Figure 8C As shown, the lens drive device 101 is fixed to the right inner plate portion 9iR and the right connecting portion 9cR of the right yoke 9R with an adhesive so as to be located on the inner side (Y1 side) of the right coil 11R with a gap GP relative to the right coil 11R. The initial state of the lens drive device 101 refers to the state of the lens drive device 101 when no current is supplied to the coil 11.

[0107] In addition, the right magnetic field generating component 10R is in the initial state of the lens driving device 101, as shown in FIG. Figure 9A As shown, the central plane MS is fixed to the right inner plate 9iR and the right connecting portion 9cR of the right yoke 9R by adhesive in a manner characterized by being located at a position higher than the right coil axis 11xR by a height HT. The central plane MS corresponds to the boundary surface between the upper right magnet 10RU and the lower right magnet 10RD. That is, Figure 10 As shown, the right magnetic field generating member 10R is arranged such that the N-pole portion of the upper right magnet 10RU faces the upper linear portion 11RU of the right coil 11R, and the S-pole portion of the lower right magnet 10RD faces the lower linear portion 11RD of the right coil 11R.

[0108] In addition, if Figure 9BAs shown, the right magnetic field generating component 10R is constructed so that its length (width W1) in the front-to-back direction (X-axis direction) is greater than the length (width W2) of the right outer plate 9eR of the right magnetic yoke 9R in the front-to-back direction (X-axis direction), and the width W1 includes the width W2.

[0109] In addition, if Figure 10 As shown, the right magnetic field generating member 10R is configured such that the width W1 is larger than the length (width W3) of each of the upper straight portion 11RU and the lower straight portion 11RD of the right coil 11R in the front-to-back direction (X-axis direction), and the width W1 includes the width W3.

[0110] The right magnetic field generating member 10R is configured such that the width W1 is smaller than the length (width W4) of the right coil 11R in the front-back direction (X-axis direction), and the width W4 includes the width W1.

[0111] In addition, the right magnetic field generating component 10R is constructed so that, in the initial state of the lens driving device 101, the length (height H1) in the up and down direction (Z-axis direction) is greater than the length (height H2) of the right coil 11R in the up and down direction (Z-axis direction), and the height H1 includes the height H2.

[0112] Next, referring to FIG11, the operation of the right yoke 9R and the right magnetic field generating member 10R implemented by the right driving unit DMR will be described. FIG11 is a right side view of the right yoke 9R, the right magnetic field generating member 10R, the right coil 11R, and the right magnetic detection member 12R. Specifically, Figure 11A The figure shows the positional relationship among the right yoke 9R, the right magnetic field generating member 10R, the right coil 11R, and the right magnetic field detecting member 12R when the lens driving device 101 is in the initial state. Figure 11B The figure shows the positional relationship among the right yoke 9R, the right magnetic field generating member 10R, the right coil 11R, and the right magnetic field detecting member 12R when the right yoke 9R and the right magnetic field generating member 10R move downward (in the Z2 direction). Figure 11C The figure shows the positional relationship between the right magnetic yoke 9R, the right magnetic field generating component 10R, the right coil 11R, and the right magnetic detection component 12R when the right magnetic yoke 9R and the right magnetic field generating component 10R are moved upward (in the Z1 direction). In addition, in FIG11 , for the sake of clarity, the north pole portion of the upper right magnet 10RU and the lower right magnet 10RD are each marked with a dense cross pattern, and the south pole portion of each is marked with a dot pattern. In addition, in FIG11 , for the sake of clarity, the right coil 11R is given a sparse cross pattern, and the circuit board 3 is omitted. In addition, the following description relates to the right drive unit DMR, but is also applicable to the left drive unit DML.

[0113] An opening 9K (right opening 9KR) is formed in the right outer plate portion 9eR of the right magnetic yoke 9R. The right opening 9KR is formed so that the change in the effective magnetic flux density becomes larger in accordance with the change in the position (height) of the right magnetic yoke 9R (right magnetic field generating component 10R) relative to the right magnetic detection component 12R in the optical axis direction. In addition, the "effective magnetic flux density" is the density of the magnetic flux passing through the right magnetic detection component 12R. That is, with respect to the structure in which the right opening 9KR is formed in the right outer plate portion 9eR of the right magnetic yoke 9R, the fluctuation range of the effective magnetic flux density is larger than that of the structure in which the right opening 9KR is not formed. In addition, the fluctuation range of the effective magnetic flux density refers to, for example, the difference between the effective magnetic flux density when the right magnetic field generating component 10R is at the upper limit position in the optical axis direction and the effective magnetic flux density when the right magnetic field generating component 10R is at the lower limit position in the optical axis direction.

[0114] This structure has the following effects: it can increase the output of the right magnetic field detecting component 12R, thereby improving the detection accuracy of the position of the right magnetic field generating component 10R based on the right magnetic field detecting component 12R. In addition, this structure has the following effects: it can increase the resolution of the right magnetic field detecting component 12R, thereby improving the detection accuracy of the position of the right magnetic field generating component 10R based on the right magnetic field detecting component 12R.

[0115] In this embodiment, if Figure 11A As shown, the right opening 9KR is configured such that the length (width W11) in the front-to-back direction (X-axis direction) is greater than the length (width W12) in the front-to-back direction (X-axis direction) of the right magnetic detection component 12R, and the width W11 includes the width W12. Figure 11A As shown, the right opening 9KR is configured such that its vertical length (height H11) is greater than the vertical length (height H12) of the right magnetic detection component 12R, and the height H11 includes the height H12.

[0116] Thus, in this embodiment, when the lens driving device 101 is in the initial state, as shown in FIG. Figure 11A As shown, the right magnetic detection member 12R is positioned so as to face the right opening 9KR. In other words, the right magnetic detection member 12R is positioned so as to be visually recognized as a whole through the right opening 9KR when viewed from the right side.

[0117] When current is supplied in a manner that flows from the first right extension portion 11sR of the right coil 11R through the right winding portion 11mR to the second right extension portion 11eR, the wire constituting the right coil 11R is subjected to an upward (Z1 direction) force (force based on the Lorentz force). The right coil 11R is fixed to the fixed side component FB (coil holding component 6) and therefore cannot move upward. Therefore, due to the reaction force of this force, the movable side component MB (right magnetic yoke 9R) moves downward. As a result, as Figure 11BAs shown, the right magnetic detection member 12R is moved to a position where only its lower portion can be visually recognized through the right opening 9KR when viewed from the right side (its upper end is hidden and invisible on the back side of the right outer plate 9eR).

[0118] On the contrary, when current is supplied in a manner that flows from the second right extension portion 11eR of the right coil 11R through the right winding portion 11mR to the first right extension portion 11sR, the wire constituting the right coil 11R is subjected to a downward (Z2 direction) force (force based on the Lorentz force). The right coil 11R is fixed to the fixed side component FB (coil holding component 6) and therefore cannot move upward. Therefore, due to the reaction force of this force, the movable side component MB (right magnetic yoke 9R) moves upward. As a result, as Figure 11C As shown, the right magnetic detection member 12R is moved to a position where only its upper portion can be visually recognized through the right opening 9KR when viewed from the right side (its lower end is hidden and cannot be seen behind the right outer plate 9eR).

[0119] In this embodiment, Figure 11B The effective magnetic flux density in the state shown is greater than Figure 11A The effective magnetic flux density in the state shown. Figure 11A The effective magnetic flux density in the state shown is greater than Figure 11C The effective magnetic flux density in the state shown. That is, in this embodiment, the lens driving device 101 is configured so that the more the right magnetic yoke 9R moves upward (in the Z1 direction), the more the effective magnetic flux density decreases approximately linearly. However, the lens driving device 101 can also be configured so that the more the right magnetic yoke 9R moves upward (in the Z1 direction), the more the effective magnetic flux density increases approximately linearly. In addition, the lens driving device 101 can also be configured so that the more the right magnetic yoke 9R moves upward (in the Z1 direction), the more the effective magnetic flux density decreases nonlinearly, and can also be configured so that the more the right magnetic yoke 9R moves upward (in the Z1 direction), the more the effective magnetic flux density increases nonlinearly.

[0120] Next, the tilt suppression function of the drive mechanism DM will be described with reference to FIG12. The tilt suppression function is a function for suppressing the tilt of the optical axis OA of the lens body. FIG12 is a front view of the lens holding component 7, the connecting component 8, and the yoke 9. Specifically, Figure 12A It is a front view of the lens holding member 7 , the connecting member 8 , and the yoke 9 when the optical axis OA is not tilted (when the optical axis OA is parallel to the Z axis). Figure 12B It is a front view of the lens holding member 7 , the connecting member 8 , and the yoke 9 when the optical axis OA is tilted (when the optical axis OA is tilted at an angle θ with respect to the Z axis).

[0121] The control device (not shown) of the lens driving device 101 is configured to detect the state of the lens holding member 7 based on the output of the magnetic detection member 12. In this embodiment, the control device is located external to the lens driving device 101. However, the control device may be installed internally in the lens driving device 101 or may be integrated with the magnetic detection member 12.

[0122] For example, the control device detects the position (height) of the left drive unit DML (left magnetic yoke 9L) in the vertical direction (Z-axis direction) based on the output of the left magnetic detection component 12L, and detects the position (height) of the right drive unit DMR (right magnetic yoke 9R) in the vertical direction (Z-axis direction) based on the output of the right magnetic detection component 12R. In addition, the control device detects the height of the left magnetic yoke 9L and the height of the right magnetic yoke 9R. Figure 12B The state shown, that is, the state in which the left yoke 9L is located higher than the right yoke 9R by a height DF, corresponds to a state in which the optical axis OA of the lens body is tilted at an inclination angle θ with respect to the Z axis.

[0123] In this case, the control device can bring the tilt angle θ close to zero by operating at least one of the left drive unit DML and the right drive unit DMR.

[0124] exist Figure 12B In the example shown, the control device lowers the left yoke 9L by the left drive unit DML and raises the right yoke 9R by the right drive unit DMR, so that the state (posture) of the lens holding member 7 becomes Figure 12A The state (posture) shown.

[0125] In addition, the control device can also use the left drive unit DML to lower the left yoke 9L without operating the right drive unit DMR, thereby making the inclination angle θ close to zero, or use the right drive unit DMR to raise the right yoke 9R without operating the left drive unit DML, thereby making the inclination angle θ close to zero.

[0126] Alternatively, the control device may bring the tilt angle θ closer to zero by making the right yoke 9R's upward movement caused by the right drive unit DMR greater than the left yoke 9L's upward movement caused by the left drive unit DML. In other words, the control device may bring the tilt angle θ closer to zero while raising both the left and right yokes 9L, 9R.

[0127] Alternatively, the control device may bring the tilt angle θ closer to zero by setting the degree of descent of the right yoke 9R by the right drive unit DMR to be smaller than the degree of descent of the left yoke 9L by the left drive unit DML. In other words, the control device may bring the tilt angle θ closer to zero while lowering both the left and right yokes 9L, 9R.

[0128] Next, referring to FIG13, the mechanism for limiting the movement of the movable side member MB, namely the stopper mechanism, will be described. FIG13 is a diagram showing the positional relationship between the base member 2, the coil holding member 6, and the yoke 9. Specifically, Figure 13A is a top view of the base member 2, the coil holding member 6 and the yoke 9. Figure 13B This is a top perspective view of the base member 2, the coil holding member 6, and the yoke 9. In FIG13 , for the sake of clarity, illustration of components other than the base member 2, the coil holding member 6, and the yoke 9 is omitted. Furthermore, in FIG13 , for the sake of clarity, the base member 2 is annotated with a dense dot pattern, the coil holding member 6 is annotated with a sparse dot pattern, and the yoke 9 is annotated with a cross pattern.

[0129] like Figure 2 As shown, four protruding portions 2S are provided on the upper surface of the base member 2 facing the object (Z1 side). Specifically, the protruding portions 2S include a left rear protruding portion 2SLB, a left front protruding portion 2SLF, a right rear protruding portion 2SRB, and a right front protruding portion 2SRF.

[0130] like Figure 2 As shown, four inwardly extending extensions 6S are provided at the four corners of the coil holding member 6. Specifically, the extensions 6S include a left rear extension 6SLB, a left front extension 6SLF, a right rear extension 6SRB, and a right front extension 6SRF. Furthermore, the coil holding member 6 is bonded to the base member 2 using an adhesive, with the lower leaf spring 5 mounted on its lower surface.

[0131] 13 , the left rear protruding portion 2SLB and the left rear extending portion 6SLB are arranged to face each other in the radial direction of a circle centered on the optical axis OA. Similarly, the left front protruding portion 2SLF and the left front extending portion 6SLF are arranged to face each other in the radial direction of a circle centered on the optical axis OA, the right rear protruding portion 2SRB and the right rear extending portion 6SRB are arranged to face each other, and the right front protruding portion 2SRF and the right front extending portion 6SRF are arranged to face each other in the radial direction of a circle centered on the optical axis OA.

[0132] The yoke 9 has a contact portion 9S that is configured to contact the extension 6S when the yoke 9 moves in the X-axis direction. Specifically, the contact portion 9S is configured to prevent the extension 6S from directly contacting the magnetic field generating component 10. In this embodiment, the right inner plate 9iR of the right yoke 9R includes a pair of right contact portions 9SR (a right rear contact portion 9SRB and a right front contact portion 9SRF). Specifically, the right front contact portion 9SRF, which is bent at the front end (the end facing the X1 direction) of the right inner plate 9iR of the right yoke 9R and extends outward (in the Y2 direction), is configured to contact the rear side surface (the surface facing the X2 direction) of the right front extension 6SRF. The right rear contact portion 9SRB, which is bent at the rear end (the end facing the X2 direction) of the right inner plate 9iR of the right yoke 9R and extends outward (in the Y2 direction), is configured to contact the front side surface (the surface facing the X1 direction) of the right rear extension 6SRB.

[0133] Similarly, the left inner plate 9iL of the left yoke 9L has a pair of left contact portions 9SL (a left rear contact portion 9SLB and a left front contact portion 9SLF). Specifically, the left front contact portion 9SLF, which is formed by bending at the front end (the end on the X1 side) of the left inner plate 9iL of the left yoke 9L and extending outward (in the Y1 direction), is configured to be able to contact the rear side surface (the surface on the X2 side) of the left front extension 6SLF, and the left rear contact portion 9SLB, which is formed by bending at the rear end (the end on the X2 side) of the left inner plate 9iL of the left yoke 9L and extending outward (in the Y1 direction), is configured to be able to contact the front side surface (the surface on the X1 side) of the left rear extension 6SLB.

[0134] The protrusion 2S and the extension 6S function as a stopper to limit the excessive movement of the movable side member MB in the X-axis direction and the Y-axis direction. Specifically, the right rear protrusion 2SRB is configured so that when the right yoke 9R moves to the Y1 side by a distance DS1, the contact surface CF1 (at the right inner plate 9iR) between the side surface on the Y2 side and the right inner plate 9iR of the right yoke 9R is Figure 8B In addition, the right front side protrusion 2SRF is configured so that when the right yoke 9R moves to the Y1 side by a distance DS1, the side surface on the Y2 side contacts the contact surface CF2 (at the right inner plate 9iR of the right yoke 9R) on the right side. Figure 8B The same also applies to the left rear protruding portion 2SLB and the left front protruding portion 2SLF.

[0135] Furthermore, the right rear extension 6SRB is configured so that when the right yoke 9R moves a distance DS2 toward the X2 side, the side surface on the X1 side contacts the right rear contact portion 9SRB of the right yoke 9R. Furthermore, the right front extension 6SRF is configured so that when the right yoke 9R moves a distance DS2 toward the X1 side, the side surface on the X2 side contacts the right front contact portion 9SRF of the right yoke 9R. The same applies to the left rear extension 6SLB and the left front extension 6SLF.

[0136] Next, the assembly method of the magnetic component MG will be described with reference to FIG14. FIG14 is a perspective view of the components constituting the magnetic component MG (left magnetic component MGL). Specifically, Figure 14A It is a perspective view of the yoke 9 to which the workpiece WP is attached. Figure 14B It is a perspective view of the yoke 9 to which the connecting member 8 is attached. Figure 14C It is a perspective view of the yoke 9 to which the magnetic field generating member 10 is further attached. Figure 14D 1 is a perspective view of the yoke 9 to which the adhesive AD3 is further attached. In addition, although the following description relates to the left magnetic component MGL, the same applies to the right magnetic component MGR.

[0137] The workpiece WP is a metal plate including the connecting member 8 and the frame member 15. Specifically, the workpiece WP includes a left workpiece WPL and a right workpiece WPR (not shown). The left workpiece WPL includes a left connecting member 8L and a left frame member 15L, and the right workpiece WPR includes a right connecting member 8R and a right frame member 15R (not shown).

[0138] The left workpiece WPL is a member used when attaching the left connecting member 8L to the left yoke 9L. In the present embodiment, the left workpiece WPL is joined to the left inner plate 9iL of the left yoke 9L by welding.

[0139] Figure 14A The left yoke 9L is shown in the state after the left workpiece WPL is welded. Figure 14A In the figure, for the sake of clarity, the left frame member 15L, which is a part of the left workpiece WPL, is marked with a sparse dot pattern. Figures 14A to 14D , for the sake of clarity, the left yoke 9L is sparsely marked with a cross pattern. The circular hole RH3 formed in the left frame member 15L is a hole for inserting a guide pin used for positioning the workpiece WP.

[0140] A through-hole 9H is formed in the inner plate 9i of the yoke 9. In this embodiment, the through-hole 9H is a circular through-hole. However, the through-hole 9H may be a through-hole having another shape such as a square, or may be a notch. The through-hole 9H includes a left through-hole 9HL formed in the left inner plate 9iL of the left yoke 9L and a right through-hole 9HR formed in the right inner plate 9iR of the right yoke 9R (see FIG. 1 ). Figure 8B ). Specifically, Figure 14A As shown, a left through portion 9HL is formed on the left inner plate portion 9iL of the left yoke 9L. The left through portion 9HL includes a left front through portion 9HLF and a left rear through portion 9HLB. The left connecting member 8L is configured to contact the surface of the left inner plate portion 9iL located between the left front through portion 9HLF and the left rear through portion 9HLB, and is welded to the left inner plate portion 9iL at three welding points WD1 to WD3. Figures 14A to 14D In the figure, for clarity, the welding points WD1 to WD3 are marked with a dense dot pattern.

[0141] Then, the left workpiece WPL is cut by a cutting device such as a cutting laser irradiation device or a cutter (not shown). As a result, the left frame member 15L constituting the left workpiece WPL is separated from the left connecting member 8L. Specifically, the left workpiece WPL is cut by the cutting laser irradiation device or the cutting device (not shown). Figure 14A The left workpiece WPL is separated into the left connecting member 8L and the left frame member 15L at the cutting line CT indicated by the dotted line. The cutting line CT includes the first cutting line CT1 to the third cutting line CT3. That is, the left workpiece WPL is cut at the first cutting line CT1 to the third cutting line CT3, respectively. More specifically, the upper end of the left connecting member 8L is separated from the left frame member 15L at the first cutting line CT1, the lower front end of the left connecting member 8L is separated from the left frame member 15L at the second cutting line CT2, and the lower rear end of the left connecting member 8L is separated from the left frame member 15L at the third cutting line CT3.

[0142] The left through-hole 9HL is used as a space for cutting by a cutting device such as a cutting laser irradiation device or a cutter. Specifically, the left front through-hole 9HLF is used as a space for cutting at the second cutting line CT2, and the left rear through-hole 9HLB is used as a space for cutting at the third cutting line CT3.

[0143] Figure 14B The diagram shows the state of the left yoke 9L after the left frame member 15L is separated from the left connecting member 8L.

[0144] The left magnetic field generating component 10L is embedded into the interior of the left magnetic yoke 9L from the lower side (Z2 side) of the left magnetic yoke 9L. Specifically, the left magnetic field generating component 10L is embedded into the interior of the left magnetic yoke 9L in the following manner: the upper surface (Z1 side surface) of the upper left magnet 10LU contacts the top surface (Z2 side surface) of the left connecting portion 9cL of the left magnetic yoke 9L, the right side surface (Y2 side surface) of the upper left magnet 10LU contacts the inner surface (Y1 side surface) of the left inner plate portion 9iL of the left magnetic yoke 9L, and the right side surface (Y2 side surface) of the lower left magnet 10LD contacts the inner surface (Y1 side surface) of the left inner plate portion 9iL of the left magnetic yoke 9L.

[0145] In this embodiment, an adhesive is applied between the upper surface (the surface on the Z1 side) of the upper left magnet 10LU and the top surface (the surface on the Z2 side) of the left connecting portion 9cL of the left magnetic yoke 9L, an adhesive is applied between the front surface (the surface on the X1 side) of the left magnetic field generating component 10L and the inner surface (the surface on the X2 side) of the left front contact portion 9SLF, and an adhesive (not shown) is applied between the rear surface (the surface on the X2 side) of the left magnetic field generating component 10L and the inner surface (the surface on the X1 side) of the left rear contact portion 9SLB.

[0146] Figure 14C 10L is mounted on the left magnetic field generating member. Figure 14C and Figure 14D In the figure, for clarity, the N-pole portion of each of the upper left magnet 10LU and the lower left magnet 10LD is marked with a dense cross pattern, and the S-pole portion of each is marked with a dense dot pattern.

[0147] When the left magnetic field generating member 10L is mounted on the left yoke 9L, the lower end BE of the upper left magnet 10LU and the upper end TE of the lower left magnet 10LD can be visually confirmed through the left through portion 9HL (each of the left rear through portion 9HLB and the left front through portion 9HLF).

[0148] At this stage, the left through portion 9HL is used as a space for applying the adhesive AD3 between the upper left magnet 10LU and the lower left magnet 10LD, and between the left magnetic field generating member 10L and the left inner plate 9iL.

[0149] Figure 14D FIG. 4 shows the state of the left yoke 9L after the adhesive AD3 is applied. Figure 14D In the figure, for clarity, the adhesive AD3 is marked with a sparse dot pattern.

[0150] Next, the positional relationship between the coil holding member 6 and the coil 11 will be described with reference to FIG15. FIG15 is a diagram showing an example of the structure of the coil holding member 6 and the coil 11. Specifically, Figure 15A It is a plan view of the coil holding member 6 and the coil 11 . Figure 15B As shown by the arrow, the Figure 15A The cross-sectional view of the coil holding member 6 and the coil 11 is taken along a plane parallel to the XZ plane along the dotted line L2 in the top view. In FIG15 , for clarity, the coil holding member 6 is marked with a sparse dot pattern, while the coil 11 is marked with a dense dot pattern.

[0151] The inner surfaces on the Y1 side of both ends (rear curved portion 11RB and front curved portion 11RF) of right coil 11R in the X-axis direction are adhesively bonded to the right rear extension 6SRB and right front extension 6SRF. Similarly, the inner surfaces on the Y2 side of both ends of left coil 11L in the X-axis direction are adhesively bonded to the left rear extension 6SLB and left front extension 6SLF. In other words, the coil assembly CA is fixed to the extension 6S.

[0152] like Figure 15B As shown, the right coil 11R includes an upper straight portion 11RU, a lower straight portion 11RD, an upper rear inclined portion 11RUB, an upper front inclined portion 11RUF, a lower rear inclined portion 11RDB, a lower front inclined portion 11RDF, a rear curved portion 11RB, and a front curved portion 11RF. In other words, compared to the case where the right coil 11R has an oblong shape, the right coil 11R has a shape with both ends narrowed. The same applies to the left coil 11L.

[0153] Compared to a case where the right coil 11R has an oblong shape, this configuration has the following advantages: the diameter of the circular hole RH4 through which the guide pin used when attaching the right coil 11R to the right extension 3R of the circuit board 3 is passed can be reduced, thereby increasing the degree of freedom in designing the conductor pattern formed in the right extension 3R. This is because the space for the circular hole RH4 in the right extension 3R can be reduced.

[0154] Furthermore, this structure has the effect of suppressing the thickness of the bottom portion 6B of the coil holding member 6 from being thinned, compared to a case where the right coil 11R has an oblong shape. Specifically, this structure has the effect of suppressing the thickness of the portions of the bottom portion 6B that are opposite the lower rear inclined portion 11RDB, the lower front inclined portion 11RDF, the rear curved portion 11RB, and the front curved portion 11RF, respectively, from being thinned. In other words, this structure has the effect of making the bottom portion 6B of the coil holding member 6 thicker, thereby increasing the strength of the bottom portion 6B.

[0155] As mentioned above, Figure 2As shown, a lens drive device 101 according to an embodiment of the present invention includes a fixed-side member FB, a lens holding member 7 capable of holding a lens body, a movable-side member MB including the lens holding member 7, and a drive mechanism DM for moving the lens holding member 7 relative to the fixed-side member FB at least in the direction of the optical axis. The drive mechanism DM includes at least two drive units, a left drive unit DML as a first drive unit and a right drive unit DMR as a second drive unit. The left drive unit DML and the right drive unit DMR are arranged to oppose each other across the optical axis OA. The left drive unit DML includes a left magnetic member MGL as a first magnetic member and a left coil 11L as a first coil. The left magnetic member MGL includes a left magnetic field generating member 10L as a first magnetic field generating member and a left magnetic yoke 9L as a first yoke. The left coil 11L is supported by a support member SM so as to be movable in the direction of the optical axis. The left coil 11L is provided on the fixed-side member FB so as to oppose the left magnetic field generating member 10L. Furthermore, the left magnetic member MGL is configured to move in the direction of the optical axis by energizing the left coil 11L. Similarly, the right drive unit DMR includes a right magnetic component MGR as a second magnetic component and a right coil 11R as a second coil. The right magnetic component MGR has a right magnetic field generating component 10R as a second magnetic field generating component and a right magnetic yoke 9R as a second magnetic yoke, and is supported by the support component SM so as to be movable in the optical axis direction. The right coil 11R is arranged on the fixed side component FB in a manner opposite to the right magnetic field generating component 10R. It is also configured so that the right magnetic component MGR moves in the optical axis direction by energizing the right coil 11R. In addition, the left coil 11L and the right coil 11R can be energized separately. The lens holding component 7 is connected to the left connecting component 8L as the first connecting component fixed to the left magnetic component MGL at the first position (the position on the left side of the upper end), and is connected to the right connecting component 8R as the second connecting component fixed to the right magnetic component MGR at the second position (the position on the right side of the upper end). The first position and the second position are opposite to each other across the optical axis OA. In the example shown in FIG. 3 , the first position is a position where the left protruding portion 7TL is formed, and the second position is a position where the right protruding portion 7TR is formed.

[0156] This configuration adjusts the current flowing through the coils of at least two drive units to achieve not only an autofocus function but also tilt suppression of the lens holding member 7. Therefore, even when the optical axis OA is tilted, this configuration can correct the tilt.

[0157] like Figure 5AAs shown, the left yoke 9L typically includes a left inner plate portion 9iL as a first inner plate portion located on the side close to the optical axis OA, a left outer plate portion 9eL as a first outer plate portion arranged to be opposed to the left inner plate portion 9iL and located on the side away from the optical axis OA, and a left inner plate portion 9iL and a left outer plate portion 9eL as a first outer plate portion connecting one end portion in the optical axis direction of the left inner plate portion 9iL and the left outer plate portion 9eL to each other (at Figure 5A In the example shown, the left connecting portion 9cL of the first connecting portion is connected to each other at the upper ends. Figure 5B As shown, the right yoke 9R typically includes a right inner plate 9iR as a second inner plate located on the side close to the optical axis OA, a right outer plate 9eR as a second outer plate arranged to face the right inner plate 9iR and located on the side away from the optical axis OA, and a right inner plate 9iR and a right outer plate 9eR as a second outer plate connected to each other in the optical axis direction (at the right inner plate 9iR and the right outer plate 9eR). Figure 5A In the example shown, the right connecting portion 9cR of the second connecting portion is connected (the upper ends are connected to each other). Furthermore, the left magnetic field generating component 10L is fixed to the inner surface of the left inner plate 9iL (the surface facing the left outer plate 9eL), and the left coil 11L is positioned between the left magnetic field generating component 10L and the left outer plate 9eL. Similarly, the right magnetic field generating component 10R is fixed to the inner surface of the right inner plate 9iR (the surface facing the right outer plate 9eR), and the right coil 11R is positioned between the right magnetic field generating component 10R and the right outer plate 9eR.

[0158] This structure can increase the thrust of the drive mechanism DM because the density of the magnetic flux passing through the coil 11 can be increased by the yoke 9 .

[0159] The left connecting component 8L is typically a plate-shaped metal component (leaf spring) that is fixed to the left inner plate 9iL of the left magnetic yoke 9L and can be elastically deformed. Similarly, the right connecting component 8R is typically a plate-shaped metal component (leaf spring) that is fixed to the right inner plate 9iR of the right magnetic yoke 9R and can be elastically deformed. Even if the movement amounts of the two magnetic components MG (the left magnetic component MGL and the right magnetic component MGR) are different, the connecting component 8 as a plate-shaped metal component (leaf spring) can suppress the influence of the difference. That is, the connecting component 8 can absorb the force generated by the difference in the movement amounts of the two magnetic components MG through its deformation. As Figure 14A As shown, the left inner plate portion 9iL is formed with a left through portion 9HL as a first through portion. Figure 14B As shown, the cut portion CP of the left connecting member 8L is located opposite to the left through portion 9HL, and as shown in FIG. Figure 14D As shown in FIG. 1 , the adhesive AD3 fixing the left magnetic field generating member 10L to the left inner plate 9iL is exposed from the left through portion 9HL. Figure 8BAs shown, the right inner plate 9iR is formed with a right through portion 9HR as a second through portion, and the cut portion CP of the right connecting member 8R (see Figure 3B ) is located at a position opposite to the right through portion 9HR, and an adhesive (not shown) fixing the right magnetic field generating member 10R to the right inner plate 9iR is exposed from the right through portion 9HR.

[0160] As shown in Figure 14, this structure allows the through-hole 9H to be used for both cutting the connecting member 8 and applying the adhesive AD3. Therefore, compared to a case where, for example, separate structures are provided for cutting the connecting member 8 and for applying the adhesive AD3, this structure can achieve a smaller lens drive device 101 and improve the productivity of the lens drive device 101.

[0161] As shown in FIG3 , the left magnetic field generating member 10L is composed of two first permanent magnets (the upper left magnet 10LU and the lower left magnet 10LD). Moreover, a portion of each of the two first permanent magnets is located at a position corresponding to the left through portion 9HL. For example, Figure 14C As shown, at the stage before applying the adhesive AD3, the upper left magnet 10LU and the lower left magnet 10LD are respectively configured to correspond to the left through portion 9HL, so that the lower end BE of the upper left magnet 10LU and the upper end TE of the lower left magnet 10LD can be visually confirmed through the left through portion 9HL. Similarly, as shown in FIG3 , the right magnetic field generating component 10R is composed of two second permanent magnets (the upper right magnet 10RU and the lower right magnet 10RD). Moreover, a portion of each of the two second permanent magnets is located at a position corresponding to the right through portion 9HR. For example, as Figure 8B As shown, before the adhesive is applied, the upper right magnet 10RU and the lower right magnet 10RD are respectively configured to correspond to the right through-portion 9HR so that the lower end BE of the upper right magnet 10RU and the upper end TE of the lower right magnet 10RD can be visually confirmed through the right through-portion 9HR.

[0162] This structure enables the adhesive to be reliably applied between each of the two permanent magnets and the inner plate portion 9 i of the yoke 9 , thereby having the effect of reliably fixing the two permanent magnets to the yoke 9 with the adhesive.

[0163] like Figure 2 As shown, the fixed side member FB includes a left outer plate 9eL (see Figure 3B ) between the first substrate (the left extension 3L of the circuit substrate 3), and the right outer plate 9eR (see Figure 3B) between the left and right extension portions 3R of the circuit substrate 3. As shown in FIG4 , the left coil 11L is formed to have a first winding portion (left winding portion 11mL) and is fixed to the first substrate (left extension portion 3L of the circuit substrate 3). The first winding portion (left winding portion 11mL) has a first coil axis (left coil axis 11xL) extending in a direction perpendicular to the optical axis. The first magnetic detection component (left magnetic detection component 12L) for receiving the magnetic field from the left magnetic field generating component 10L and detecting the position of the left magnetic component MGL in the optical axis direction is located in the left winding portion 11mL and is fixed to the first substrate (left extension portion 3L of the circuit substrate 3). As shown in FIG4 , the right coil 11R is formed to include a second winding portion (right winding portion 11mR) having a second coil axis (right coil axis 11xR) extending in a direction perpendicular to the optical axis and is fixed to the second substrate (right extension portion 3R of the circuit substrate 3). A second magnetic detection component (right magnetic detection component 12R) for receiving the magnetic field from the right magnetic field generating component 10R and detecting the position of the right magnetic component MGR in the optical axis direction is located within the right winding portion 11mR and is fixed to the second substrate (right extension portion 3R of the circuit substrate 3).

[0164] This configuration has an effect of achieving feedback control of the position of the magnetic member MG based on the position of the magnetic member MG detected by the magnetic detection member 12 .

[0165] As shown in FIG11 , a right opening 9KR is formed in the right outer plate 9eR of the right yoke 9R at a portion corresponding to the right magnetic detection component 12R. Also, a left opening 9KL is formed in the left outer plate 9eL of the left yoke 9L at a portion corresponding to the left magnetic detection component 12L (see FIG11 ). Figure 3A ).

[0166] This configuration has the effect of increasing the change in the magnetic field received by the magnetic detection element 12 with respect to the change in the position of the magnetic member MG in the optical axis direction, thereby improving the detection accuracy of the position of the magnetic member MG in the optical axis direction.

[0167] like Figure 7A As shown, the fixed-side member FB includes a coil holding member 6 that supports the left coil 11L constituting the left drive unit DML and the right coil 11R constituting the right drive unit DMR.

[0168] In this structure, since at least two coils 11 (the left coil 11L and the right coil 11R) are held by one coil holding member 6 , there is an effect that the coil assembly CA can be easily handled.

[0169] like Figure 5AAs shown, the left connecting portion 9cL of the left yoke 9L is a plate-shaped portion connecting the upper ends of the left inner plate 9iL and the left outer plate 9eL, and the right connecting portion 9cR of the right yoke 9R is a plate-shaped portion connecting the upper ends of the right inner plate 9iR and the right outer plate 9eR. Figure 2 As shown, the support member SM includes an upper leaf spring 4 and a lower leaf spring 5. The upper leaf spring 4 is provided on the upper portion of the coil holding member 6 ( Figure 7A The lower leaf spring 5 is provided between the upper end surface of the base portion 6P shown in FIG. 1 and the left yoke 9L (left connecting portion 9cL), and between the upper portion of the coil holding member 6 and the right yoke 9R (right connecting portion 9cR). Figure 7B Between the lower end surface of the base portion 6P shown in the figure and the left magnetic field generating member 10L, and between the lower portion of the coil holding member 6 and the right magnetic field generating member 10R.

[0170] In this structure, since the lower leaf spring 5 is fixed to the lower left magnet 10LD and the lower right magnet 10RD serving as driving magnets, similar to the upper leaf spring 4, the lens driving device 101 can be miniaturized compared to the case where the lower leaf spring 5 is fixed to the magnetic yoke 9 (left magnetic yoke 9L and right magnetic yoke 9R).

[0171] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-mentioned embodiments. Various modifications or substitutions can be applied to the above-mentioned embodiments without departing from the scope of the present invention. In addition, the various features described with reference to the above-mentioned embodiments may be appropriately combined as long as they are not technically contradictory.

[0172] For example, in the above-mentioned embodiment, the drive mechanism DM is configured to include a left drive unit DML and a right drive unit DMR, but it may also include a front drive unit arranged on the front side (X1 side) of the lens holding component 7 and a rear drive unit arranged on the rear side (X2 side) of the lens holding component 7. That is, the drive mechanism DM may also include four drive units arranged on the front, back, left and right sides of the lens holding component 7. The four drive units are preferably configured to have the same shape and to be four-fold rotationally symmetrical about the optical axis OA when viewed from above (Japanese: four-fold rotation symmetry). In this case, the lens drive device 101 can realize the translation of the lens holding component 7 in the Z-axis direction, the rotation around the rotation axis parallel to the X-axis, and the rotation around the rotation axis parallel to the Y-axis. Therefore, in addition to the automatic focusing function, the lens drive device 101 can also realize the hand shake correction function.

[0173] Furthermore, in the above-described embodiment, the yoke 9 is configured such that the connecting portion 9c connects the upper end of the inner plate 9i and the upper end of the outer plate 9e. However, the connecting portion may alternatively connect the lower end of the inner plate 9i and the lower end of the outer plate 9e. In this case, the inner portion 5i of the lower leaf spring 5 may be fixed to the lower surface of the connecting portion, while the inner portion 4i of the upper leaf spring 4 may be fixed to the upper surface of the magnetic field generating member 10. In other words, the connecting portion 9c connecting the upper end of the inner plate 9i and the upper end of the outer plate 9e may be omitted.

[0174] In addition, in the above-described embodiment, the opening 9K (see FIG. 1 ) is formed by a single through-hole, but may be formed by a plurality of through-holes, or may be formed by one or more notches.

[0175] Description of Reference Numerals

[0176] 1. Cover member; 1A, outer peripheral wall; 1A1, 1st side plate; 1A2, 2nd side plate; 1A3, 3rd side plate; 1A4, 4th side plate; 1B, upper plate; 1C, cylindrical wall; 1D, annular plate; 1K, opening; 2. Base member; 2K, opening; 2S, protruding portion; 2SLB, left rear protruding portion; 2SLF, left front protruding portion; 2SRB, right rear protruding portion; 2SRF, right front protruding portion; 3. Circuit board; 3B, rear extension; 3L, left extension; 3R, right extension; 4, upper leaf spring; 4e, outer portion; 4g, elastic arm; 4H, through hole; 4i, inner portion; 4iL, left inner portion; 4iR, right inner portion; 4r, grid; 5. : lower leaf spring; 5e, outer portion; 5g, elastic arm portion; 5i, inner portion; 5iL, left inner portion; 5iR, right inner portion; 5r, grid portion; 6, coil holding component; 6B, bottom portion; 6K, opening; 6P, base portion; 6R, recess; 6S, extension portion; 6SLB, left rear extension portion; 6SLF, left front extension portion; 6SRB, right rear extension portion; 6SRF, right front extension portion; 6T, protrusion; 7, lens holding component; 7H, through hole; 7HL, left through hole; 7HR, right through hole; 7P, cylindrical portion; 7T, protrusion; 7TL, left protrusion; 7TR, right protrusion; 8, connecting component; 8L, left connecting component; 8R, right connecting component; 9, yoke; 9 c, connecting part; 9cL, left connecting part; 9cR, right connecting part; 9e, outer plate; 9eL, left outer plate; 9eR, right outer plate; 9H, through-hole; 9HL, left through-hole; 9HLB, left rear through-hole; 9HLF, left front through-hole; 9HR, right through-hole; 9i, inner plate; 9iL, left inner plate; 9iR, right inner plate; 9K, opening; 9KL, left opening; 9KR, right opening; 9L, left yoke; 9R, right yoke; 9S, contact part; 9SL, left contact; 9SLB, left rear contact; 9SLF, left front contact; 9SR, right contact; 9SRB, right rear contact; 9SRF, right front contact; 10, magnetic field generating component; 10L, left magnetic Field generating component; 10LD, lower left magnet; 10LU, upper left magnet; 10R, right magnetic field generating component; 10RD, lower right magnet; 10RU, upper right magnet; 11, coil; 11e, second extension; 11eL, second left extension; 11eR, second right extension; 11L, left coil; 11m, winding portion; 11mL, left winding portion; 11mR, right winding portion; 11R, right coil; 11RB, rear curved portion; 11RD, lower straight portion; 11RDB, lower rear inclined portion; 11RDF, lower front inclined portion; 11RF, front curved portion; 11RU, upper straight portion; 11RUB, upper rear inclined portion; 11RUF, upper front inclined portion;11s, first extension; 11sL, first left extension; 11sR, first right extension; 11x, coil axis; 11xL, left coil axis; 11xR, right coil axis; 12, magnetic detection component; 12L, left magnetic detection component; 12R, right magnetic detection component; 13, capacitor; 13L, left capacitor; 13R, right capacitor; 14, reinforcement component; 14B, rear reinforcement component; 14L, left reinforcement component; 14R, right reinforcement component; 101, lens drive Actuator; AD0 to AD3, adhesive; CA, coil assembly; CP, cutting section; DM, drive mechanism; DML, left drive section; DMR, right drive section; FB, fixed side member; HS, frame; MB, movable side member; MG, magnetic member; MGL, left magnetic member; MGR, right magnetic member; MS, center plane; OA, optical axis; PD1, first conductor pad; PD2, second conductor pad; RH1 to RH3, circular holes; SM, supporting member.

Claims

1. A lens driving device comprising: Fixed side parts; A lens holding component capable of holding the lens body; a movable side member including the lens holding member; and a driving mechanism for moving the lens holding member relative to the fixed side member at least in the optical axis direction; The lens driving device is characterized in that: The driving mechanism includes at least two driving parts including a first driving part and a second driving part that are arranged to face each other across the optical axis. The first driving portion comprises: a first magnetic member having a first magnetic field generating member and a first yoke, and supported by a supporting member so as to be movable in the optical axis direction; and a first coil provided on the fixed side member in a manner opposing the first magnetic field generating member, and the first driving portion is configured such that the first magnetic member moves in the optical axis direction by energizing the first coil. The second driving portion comprises: a second magnetic member having a second magnetic field generating member and a second yoke, and supported by the supporting member so as to be movable in the direction of the optical axis; and a second coil provided on the fixed-side member in a manner opposed to the second magnetic field generating member, and the second driving portion is configured such that the second magnetic member moves in the direction of the optical axis by energizing the second coil. The first coil and the second coil can be energized independently. The lens holding member is connected to a first elastically deformable first connecting member fixed to the first magnetic member at a first position, and is connected to a second elastically deformable second connecting member fixed to the second magnetic member at a second position. The first connecting member is an elastically deformable metal member, and connects the lens holding member and the first magnetic member in a manner that the lens holding member and the first magnetic member do not contact each other. The second connecting member is an elastically deformable metal member, and connects the lens holding member and the second magnetic member in a manner that the lens holding member and the second magnetic member do not contact each other. The first position and the second position are opposed to each other across the optical axis.

2. The lens driving device according to claim 1, wherein: The first yoke includes: a first inner plate portion located closer to the optical axis; and a first outer plate portion disposed opposite to the first inner plate portion and located farther from the optical axis. and a first connecting portion connecting the first inner plate portion and one end portion of the first outer plate portion in the optical axis direction to each other, The second yoke includes: a second inner plate portion located closer to the optical axis; and a second outer plate portion disposed opposite to the second inner plate portion and located farther from the optical axis. and a second connecting portion connecting the second inner plate portion and one end portion of the second outer plate portion in the optical axis direction to each other, The first magnetic field generating member is fixed to the inner surface of the first inner plate, and the first coil is arranged between the first magnetic field generating member and the first outer plate. The second magnetic field generating member is fixed to the inner surface of the second inner plate, and the second coil is arranged between the second magnetic field generating member and the second outer plate.

3. A lens driving device, characterized in that: Fixed side parts; A lens holding component capable of holding the lens body; a movable side member including the lens holding member; and a driving mechanism for moving the lens holding member relative to the fixed side member at least in the optical axis direction; The lens driving device is characterized in that: The driving mechanism includes at least two driving parts including a first driving part and a second driving part that are arranged to face each other across the optical axis. The first driving portion comprises: a first magnetic member having a first magnetic field generating member and a first yoke, and supported by a supporting member so as to be movable in the optical axis direction; and a first coil provided on the fixed side member in a manner opposing the first magnetic field generating member, and the first driving portion is configured such that the first magnetic member moves in the optical axis direction by energizing the first coil. The second driving portion comprises: a second magnetic member having a second magnetic field generating member and a second yoke, and supported by the supporting member so as to be movable in the direction of the optical axis; and a second coil provided on the fixed-side member in a manner opposed to the second magnetic field generating member, and the second driving portion is configured such that the second magnetic member moves in the direction of the optical axis by energizing the second coil. The first coil and the second coil can be energized independently. The lens holding member is connected to a first connecting member fixed to the first magnetic member at a first position, and is connected to a second connecting member fixed to the second magnetic member at a second position. The first position and the second position are opposed to each other across the optical axis. The first yoke includes: a first inner plate portion located closer to the optical axis; and a first outer plate portion disposed opposite to the first inner plate portion and located farther from the optical axis. and a first connecting portion connecting the first inner plate portion and one end portion of the first outer plate portion in the optical axis direction to each other, The second yoke includes: a second inner plate portion located closer to the optical axis; and a second outer plate portion disposed opposite to the second inner plate portion and located farther from the optical axis. and a second connecting portion connecting the second inner plate portion and one end portion of the second outer plate portion in the optical axis direction to each other, The first magnetic field generating member is fixed to the inner surface of the first inner plate, and the first coil is arranged between the first magnetic field generating member and the first outer plate. The second magnetic field generating member is fixed to the inner surface of the second inner plate, and the second coil is arranged between the second magnetic field generating member and the second outer plate. The first connecting member is an elastically deformable plate-shaped metal member fixed to the first inner plate portion of the first yoke. The second connecting member is an elastically deformable plate-shaped metal member fixed to the second inner plate portion of the second yoke.

4. The lens driving device according to claim 3, wherein: A first through portion is formed in the first inner plate portion, the cut portion of the first connecting member is located at a position opposite to the first through portion, and an adhesive fixing the first magnetic field generating member to the first inner plate portion is exposed from the first through portion. The second inner plate has a second through portion formed therein, the cut portion of the second connecting member is located opposite the second through portion, and an adhesive fixing the second magnetic field generating member to the second inner plate is exposed from the second through portion.

5. The lens driving device according to claim 4, wherein: The first magnetic field generating member is composed of two first permanent magnets, and a portion of each of the two first permanent magnets is located at a position corresponding to the first through portion. The second magnetic field generating member is composed of two second permanent magnets, and a portion of each of the two second permanent magnets is located at a position corresponding to the second penetration portion.

6. The lens driving device according to any one of claims 2 to 5, wherein: The fixed side member includes: a first substrate disposed between the first magnetic field generating member and the first outer plate; and a second substrate disposed between the second magnetic field generating member and the second outer plate. The first coil is formed to have a first winding portion and is fixed to the first substrate. The first winding portion has a first coil axis extending in a direction perpendicular to the optical axis direction. A first magnetic detection member for receiving a magnetic field from the first magnetic field generating member and detecting a position of the first magnetic member in the optical axis direction is located in the first winding portion and is fixed to the first substrate. The second coil is formed to have a second winding portion and is fixed to the second substrate. The second winding portion has a second coil axis extending in a direction perpendicular to the optical axis direction. A second magnetic detection member for receiving a magnetic field from the second magnetic field generating member and detecting a position of the second magnetic member in the optical axis direction is located in the second winding portion and fixed to the second substrate.

7. The lens driving device according to claim 6, wherein: The first outer plate has an opening formed at a portion corresponding to the first magnetic detection member. The second outer plate has an opening formed in a portion corresponding to the second magnetic detection member.

8. The lens driving device according to any one of claims 2 to 5, wherein: The fixed-side member includes a coil holding member that supports the first coil of the first drive unit and the second coil of the second drive unit.

9. The lens driving device according to claim 8, wherein: The first connecting portion of the first yoke is a plate-shaped portion that connects upper ends of the first inner plate and the first outer plate in the optical axis direction. The second connecting portion of the second yoke is a plate-shaped portion connecting upper ends of the second inner plate and the second outer plate in the optical axis direction. The supporting member includes an upper leaf spring and a lower leaf spring, The upper leaf spring is provided between the upper portion of the coil holding member and the first connecting portion, and between the upper portion of the coil holding member and the second connecting portion. The lower leaf spring is provided between the lower portion of the coil holding member and the first magnetic field generating member, and between the lower portion of the coil holding member and the second magnetic field generating member.

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