JP2017083805A - Lens drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens drive device capable of facilitating handling of a suspension wire.SOLUTION: In a lens drive device 1, suspension wires 411, 412, 413 and 414 each comprise a first extension part 81 extending in an optical axis direction and a second extension part 83 extending in a direction crossing the first extension part 81 from one end of the first extension part 81. The second extension part 83 is buried in a frame-like part 331 of an attachment member 33. The second extension part 83 has a plurality of bent parts which are buried in the frame-like part 331 of the attachment member 33.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a lens driving device, and more particularly to a lens driving device used for a relatively small camera mounted on a mobile phone or the like.

In recent years, there has been a demand for higher performance and higher functionality of cameras mounted on mobile phones and the like, and lens driving devices mounted on mobile phones with cameras have not only an autofocus function but also a camera shake correction function. Is required.
A conventional AF camera module called a photographing unit (movable module) is supported by four suspension wires, and is driven in two directions perpendicular to the optical axis to correct camera shake.
Specifically, one end of each of the four linear suspension wires is fixed to the four corners of the base, and the other end is inserted into the through hole of the upper leaf spring and fixed with solder or the like.

JP 2013-44924 A

  By the way, since the suspension wire is extremely thin, there is a problem that it is difficult to attach the suspension wire to the attachment member in the manufacturing process. Further, when the suspension wire is detached from the attachment member, there is a problem that it takes time to reattach the suspension wire.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a lens driving device that can simplify the handling of a suspension wire.

  In order to achieve the above-described object, a lens driving device of the present invention includes a lens holder that can hold a lens body, an autofocus mechanism that moves the lens holder along an optical axis direction, the lens holder, and the auto A lens driving device including a camera shake correction mechanism that moves a focus mechanism in a direction that intersects the optical axis direction, and a plurality of suspensions that movably support the autofocus mechanism in a direction that intersects the optical axis direction The suspension wire has a first extending portion that extends linearly and supports the autofocus mechanism, and the first extending portion is different from one end of the first extending portion. A second extending portion extending in a direction, and the second extending portion moves together with the lens holder in a direction intersecting the optical axis direction. It has been set.

  According to this configuration, since the second extending portion of the suspension wire is embedded in the attachment member, it is not necessary to handle the suspension wire that is thin and difficult to handle alone. Thereby, a manufacturing process can be simplified and a yield can be improved.

Preferably, the first extension portion of the suspension wire of the lens driving device of the present invention extends along the optical axis direction, and the second extension portion intersects the optical axis direction. It is extended.
According to this configuration, the second extending portion can be hardly detached from the attachment member.

Preferably, the second extending portion of the lens driving device of the present invention has a plurality of bent portions, and the bent portions are embedded in the mounting member.
According to this configuration, even if the attachment member moves in a direction intersecting the optical axis direction due to camera shake correction, the second extending portion can hardly be detached from the attachment member.

Preferably, in the lens driving device according to the present invention, the lens holder is fixed so as to be sandwiched between the upper leaf spring and the lower leaf spring from both sides, and the attachment member is a frame-like portion that fixes the upper leaf spring. The second extending portion of the suspension wire is embedded in the frame-shaped portion.
According to this configuration, the suspension wire can be fixed with a relatively simple configuration.

Preferably, the upper leaf spring of the lens driving device of the present invention has two separated first upper leaf springs and second upper leaf springs, and electromagnetic force that moves the lens holder in the optical axis direction. A first coil for generating the first coil is fixed to the lens holder, one end of the first coil is conductively connected to the first upper leaf spring, and the other end of the first coil is the second. The first suspension wire is conductively connected to the first upper leaf spring, and the second suspension wire is electrically connected to the second upper leaf spring.
According to this configuration, the first and second suspension wires can be used as a path for energizing the first coil.

Preferably, the frame-like portion of the lens driving device of the present invention includes a part of the second extending portion of the first suspension wire and one of the second extending portions of the second suspension wire. The first suspension wire and the second suspension wire are embedded with the portion exposed to the outside, and the part of the second extending portion of the first suspension wire is the first suspension wire. The upper leaf spring is conductively connected, and the part of the second extending portion of the second suspension wire is conductively connected to the second upper leaf spring.
According to this configuration, even if the second extending portions of the first and second suspension wires are embedded in the frame-shaped portion of the attachment member, these suspension wires and the first and second upper leaf springs are connected. Easy conduction connection.

Preferably, the lens driving device of the present invention includes a base member having a plurality of metal members, and the other end of the first extending portion of the suspension wire is fixed to the metal member.
According to this configuration, the suspension wire can be stably supported by the metal member that can be energized.

Preferably, the lens driving device of the present invention includes a yoke integrated with the mounting member, and the mounting member is formed in a polygonal shape, and the frame-shaped portion is located on a side of the polygon, A first protrusion provided on a lower surface of the frame-shaped portion of the mounting member for fixing the upper leaf spring; and a leg portion provided on the corner of the polygon. A through portion of the yoke and a through portion of the yoke are inserted into the first protrusion, the upper plate spring and the yoke are fixed to the frame-shaped portion of the mounting member, and the lower plate spring of the leg portion is fixed. A second projecting portion is provided on the lower surface, a penetrating portion of the lower leaf spring is inserted into the second projecting portion, and the lower leaf spring is fixed to the leg portion.
According to this configuration, since both the first protrusion and the second protrusion protrude in the same direction, it is not necessary to reverse the direction of the attachment member at the time of manufacture, so that productivity can be improved.

Preferably, the lens driving device according to the present invention has a first coil for generating an electromagnetic force that moves the lens holder in the optical axis direction, and is opposed to the first coil outside the first coil. A magnet that generates a magnetic field that generates an electromagnetic force in the direction of the optical axis due to electromagnetic interaction between the current flowing through the first coil and the magnetic axis generated by the magnetic interaction generated by the magnet. A second coil for passing an electric current that generates an electromagnetic force in a direction crossing the direction, and the first coil is located on an outer periphery of the lens holder and moves integrally with the lens holder, The second coil is disposed below the magnet.
According to this configuration, the lens holder moves in the optical axis direction due to the electromagnetic interaction between the current flowing through the first coil and the magnet, and the current flowing through the second coil and the electromagnetic between the magnet and the magnet with a small-scale configuration. The entire autofocus mechanism can be moved in the direction intersecting the optical axis by the interaction.

  According to the present invention, it is possible to provide a lens driving device that can easily handle a suspension wire.

1 is an external perspective view of a lens driving device according to an embodiment of the present invention. It is the disassembled perspective view seen from the upper side of the lens drive device shown in FIG. It is the disassembled perspective view seen from the downward side of the lens drive device shown in FIG. It is the perspective view seen from the lower side of the state which abbreviate | omitted the case of the lens drive device shown in FIG. 1, a flexible substrate, etc. FIG. It is a perspective view for demonstrating the structure which concerns on the base member of the lens drive device which concerns on embodiment of this invention, a lower side leaf | plate spring, a 1st coil, an upper side leaf | plate spring, and a suspension wire. It is a top view of the upper side leaf | plate spring which concerns on embodiment of this invention. It is a figure for demonstrating the shape of the suspension wire which concerns on embodiment of this invention. It is the perspective view which looked at the corner | angular part of the attachment member which concerns on embodiment of this invention from the downward side. It is a perspective view for demonstrating the structure of four corner vicinity of the lens drive device which concerns on embodiment of this invention in the state which removed the case and the attachment member.

Hereinafter, a lens driving device according to an embodiment of the present invention will be described.
[Embodiment]
FIG. 1 is an external perspective view of a lens driving device 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lens driving device 1 shown in FIG. FIG. 3 is an exploded perspective view of the lens driving device 1 shown in FIG. FIG. 4 is a perspective view of the lens driving device 1 shown in FIG. 1 as viewed from the base member 11 with the case 35, the flexible substrate 8 and the like omitted.
For easy understanding, FIG. 1 shows a state in which the lens body 3 is attached to the lens holder 27.

  As shown in FIGS. 1 to 4, the lens driving device 1 includes, for example, a base member 11, four second coils 13, a metal member (wire holder) 15, a lower leaf spring 17, first coils 21, 4. Each magnet (permanent magnet) 23, insulating sheet 25, lens holder 27, upper leaf spring 29, yoke 31, mounting member (top cover) 33, case 35, and four suspension wires 411, 412, 413, 414. .

The lens driving device 1 has an autofocus function and a camera shake correction function.
The autofocus function is a function for adjusting the focus by moving the lens holder 27 holding the lens body 3 in the optical axis (Z direction) based on the captured image, and is realized by the autofocus mechanism 5. The autofocus mechanism 5 is realized by, for example, the first coil 21, the magnet 23, the yoke 31, the attachment member 33, the lower leaf spring 17, the upper leaf spring 29, and the like.

The camera shake correction function is a function that corrects camera shake generated at the time of shooting based on position information detected by a Hall element or the like so that an image without image blur can be picked up, and is realized by the camera shake correction mechanism 7. In the camera shake correction function, as will be described later, the lens holder 27 and the autofocus mechanism 5 are moved in the X and Y axis directions intersecting the optical axis direction.
The camera shake correction mechanism 7 mainly includes a second coil 13, a metal member 15, a yoke 31, a magnet 23, suspension wires 411, 412, 413, and 414.

In the lens driving device 1, the suspension wires 411, 412, 413, and 414 made of metal wires are provided with a first extending portion 81 extending in the optical axis direction and a first extending portion from one end of the first extending portion 81. A second extending portion 83 extending in a direction intersecting (orthogonal) with the portion 81. The second extending portion 83 is embedded in the frame-shaped portion 331 of the attachment member 33.
Therefore, in the manufacturing process of the lens driving device 1, the suspension wires 411, 412, 413, 414 can be handled integrally with the mounting member 33, and handling of the thin suspension wires 411, 412, 413, 414 is facilitated.

Hereinafter, the configuration and operation of the lens driving device 1 will be described in detail.
The lens holder 27 that can hold the lens body 3 is sandwiched between the lower leaf spring 17 and the upper leaf spring 29 from both sides in the Z-axis direction and is elastically fixed.
The first coil 21 is fixed to the outer periphery of the lens holder 27. The first coil 21 is formed by winding a conducting wire around the outer periphery of the lens holder 27. When the first coil 21 is energized, the first coil 21 and the lens holder 27 are integrated together in the Z-axis direction (optical axis direction) by electromagnetic interaction between the current flowing through the first coil 21 and the magnetic field from the magnet 23. ) Electromagnetic force is generated. Thereby, an autofocus function is realized.

  Four second coils 13 are provided point-symmetrically in the vicinity of the center of each side of the base member 11 along the X and Y planes. A magnetic field from the magnet 23 traverses the second coil 13. Therefore, when the second coil 13 is energized, the lens holder 27 and the autofocus mechanism 5 are entirely moved in the X and Y directions by electromagnetic interaction between the current flowing through the second coil 13 and the magnetic field from the magnet 23. Electromagnetic force that moves along the axis is generated. Thereby, a camera shake correction function is realized.

  FIG. 5 illustrates a structure related to the base member 11, the lower leaf spring 17, the first coil 21, the upper leaf spring 29, and the suspension wires 411, 412, 413, 414 of the lens driving device 1 according to the embodiment of the present invention. It is a perspective view for doing. FIG. 6 is a plan view of the upper leaf spring 29. FIG. 7 is a diagram for explaining the shapes of the suspension wires 411, 412, 413, and 414. FIG. 8 is a perspective view of the corner portion of the attachment member 33 as viewed from below. FIG. 9 is a perspective view for explaining the configuration in the vicinity of the four corners of the lens driving device 1 with the case 35 and the attachment member 33 removed.

For example, the base member 11 is formed by molding an insulating resin material, and is formed in a rectangular shape.
A circular opening is formed near the center of the base member 11 at a position corresponding to an image sensor (not shown).
Positioning portions used for positioning the second coil 13 are provided at predetermined positions on each of the four sides of the base member 11. A flexible substrate 8 on which Hall elements 462 and 463 are mounted is fixed to the lower surface of the base member 11.

As shown in FIG. 5, the metal member 15 is fixed to the base member 11 by insert molding, and the notches 151 of the metal member 15 are located at the four corners of the base member 11. The metal member 15 is formed by blanking and bending a metal plate material.
As shown in FIGS. 4, 5, and 9, the cutout portion 151 of the metal member 15 has a lower end portion of the first extension portion 81 of the suspension wires 411, 412, 413, and 414 extending in the Z direction. Is inserted and fixed. The fixing is performed with solder or a conductive adhesive. As shown in FIG. 4, a solder fillet 153 that fixes the ends of the suspension wires 411, 412, 413, 414 is formed on the lower surface of the notch 151.

  The first extending portion 81 of the suspension wires 411, 412, 413, and 414 is formed in an elongated and substantially cylindrical shape and linearly. The upper ends of the first extending portions 81 of the suspension wires 411, 412, 413, and 414 are embedded in the attachment member 33 as shown in FIG. 4. As will be described later, the suspension wires 411 and 412 are also used to supply power to the first coil 21.

Hereinafter, the suspension wires 411, 412, 413, and 414 will be described in detail.
The suspension wires 411, 412, 413, and 414 are fixed to the mounting member 33 and support the autofocus mechanism 5 so as to be movable in the X and Y directions.
As shown in FIG. 7, the suspension wires 411, 412, 413, and 414 are first extended from the first extending portion 81 extending in the optical axis direction (Z direction) and one end (upper end) of the first extending portion 81. A first extending portion 81 and a second extending portion 83 extending in a direction intersecting the first extending portion 81. In the present embodiment, the second extending portion 83 extends along a plane (X, Y plane) orthogonal to the optical axis direction, and a direction substantially orthogonal to the first extending portion 81. It extends to.
The second extending portion 83 is embedded in the frame-shaped portion 331 of the attachment member 33.

The suspension wires 411, 412, 413, and 414 are embedded in the attachment member 33 when, for example, the resin attachment member 33 is manufactured by injection molding or the like.
Therefore, in the manufacturing process of the lens driving device 1, the suspension wires 411, 412, 413, 414 can be handled integrally with the mounting member 33, and the suspension wires 411, 412, 413, 414 made of thin metal wires can be handled. It becomes easy.

  As shown in FIG. 7, the second extending portion 83 has a plurality of bent portions, and the bent portions are embedded in the frame-shaped portion 331 of the attachment member 33. The plurality of bent portions are configured in various directions and lengths. According to this configuration, the second extending portion 83 is not easily detached from the attachment member 33, and the suspension wires 411, 412, 413, and 414 can be fixed to the attachment member 33 in a stable state.

As shown in FIG. 6, the upper leaf spring 29 has a first upper leaf spring 129 and a second upper leaf spring 229 made of electrically conductive conductive metal plates.
The frame-shaped portion 331 of the attachment member 33 is formed by connecting a part of the second extending portion 83 of the suspension wire 411 and a part of the second extending portion 83 of the suspension wire 412 with the first upper leaf spring 129 and the second extending portion 83. It is embedded in a state where it is exposed on the lower surface facing the second upper leaf spring 229.
A part of the second extending portion 83 of the suspension wire 411 (exposed portion from the frame-shaped portion 331) is conductively connected to the first upper leaf spring 129, and the second extending portion 83 of the suspension wire 412 is connected. Is partially connected to the second upper leaf spring 229 (exposed portion from the frame-shaped portion 331). The conductive connection between the suspension wires 411 and 412 and the upper leaf springs 129 and 229 may be only mechanical pressure contact. In the present embodiment, although not shown, a bonding material such as solder or conductive adhesive is used.

In addition, one end of the first coil 21 is conductively connected to the first upper leaf spring 129 via a wire 87 with a bonding material such as solder, and the other end of the first coil 21 is connected to a second via a wire 89. The upper leaf spring 229 is conductively connected by a bonding material such as solder.
With this configuration, the suspension wire 411 and one end of the first coil 21 are conductively connected, and the suspension wire 412 and the other end of the first coil 21 are conductively connected, so that the first and second suspension wires 411 are connected. Power can be supplied to the first coil 21 via 412.

As shown in FIGS. 2, 3 and 5, an elongated second coil 13 is fixed to each of the four sides of the base member 11. By adopting a structure in which the second coil 13 is fixed to the four sides of the base member 11 in this manner, the positioning of the second coil 13 is facilitated, and the manufacturing process can be simplified. Note that both ends of each second coil 13 are soldered to the wiring pattern of the flexible substrate 8.
The magnetic field from the magnet 23 traverses the second coil 13. Therefore, an electromagnetic force that moves the lens holder 27 and the autofocus mechanism 5 along the X and Y directions as a whole is generated by the electromagnetic interaction between the current flowing through the second coil 13 and the magnetic field from the magnet 23.

  Here, the second coil 13 is positioned below the yoke 31 and the magnet 23 (on the base member 11 side) so as to overlap the member in the Z-axis (optical axis) direction. The second coil 13 is fixed to the base member 11.

Thus, by positioning the two coils 13 so as to overlap the yoke 31 and the magnet 23 in the Z-axis (optical axis) direction, a space with a higher magnetic flux density than in the case where the two coils 13 are positioned outside the member. The second coil 13 can be disposed inside. Therefore, a high electromagnetic force (thrust) characteristic can be exhibited between the current flowing through the second coil 13 and the magnet 23.
In the present embodiment, the second coil 13 is formed by winding a conductive wire. However, a laminated coil constituted by laminating a plurality of films on which conductive patterns are formed may be used. good.

As shown in FIGS. 2, 5, and 9, the lower leaf spring 17 made of a metal plate has penetrating portions 171 at four corners, and the penetrating portion 171 has the second mounting member 33 shown in FIGS. 3 and 8. The protrusion 333a is inserted. The tip of the second protrusion 333 a is deformed while being inserted into the through-hole 171. Thereby, the lower leaf spring 17 is fixed to the leg portion 333 of the attachment member 33. The fixing is performed by caulking. Caulking is performed, for example, by crushing a resin boss (second protrusion 333a) from the tip side. In FIGS. 3 and 8, the first protrusion 331a and the second protrusion 333a are shown in a crushed state.
The lower leaf spring 17 has an inner portion fixed to the lower portion of the lens holder 27.
In the present embodiment, since the lower leaf spring 17 and the upper leaf spring 29 are fixed to the mounting member 33 which is the same member, the lens holder 27 can be made difficult to tilt with respect to the optical axis.

As shown in FIGS. 2, 3, and 5, the first coil 21 has a substantially rectangular shape, and is wound around and fixed to the outer periphery of the lens holder 27. The first coil 21 is powered by the suspension wires 411 and 412 as described above.
In addition, four magnets 23 facing each other with a gap in each of the four sides of the first coil 21 are located outside the lens holder 27 and inside the yoke 31.

  As shown in FIG. 2 and FIG. 3, the yoke 31 is in contact with the four sides of the rectangle, the yoke side surface portion 371 positioned in contact with the side surface of the magnet 23 and the upper surface of the magnet 23. And a yoke ceiling portion 311 located opposite to each other. The magnet 23 and the yoke 31 are integrated by an adhesive or the like, and the yoke 31 moves integrally with the magnet 23.

A total of eight penetrating portions 313 are formed on both sides of the notch portion 321 of the yoke ceiling portion 311 of the yoke 31. The first protrusion 331 a provided on the lower surface of the frame-shaped portion 331 of the attachment member 33 shown in FIG. 8 is inserted through the penetration portion 313 of the yoke 31 and fixed. Thereby, the yoke 31 and the attachment member 33 are integrated.
The fixing is performed by caulking. In addition, although there are a total of eight fixing points by caulking between the yoke 31 and the mounting member 33, at least one point may be fixed with an adhesive for positioning (adjusting backlash).

At this time, the first protrusion 331a is also inserted into the penetration part 251 of the insulating sheet 25 and the penetration part 293 of the upper leaf springs 129 and 229 shown in FIGS. As a result, the insulating sheet 25 and the upper leaf spring 29 are fixed while being sandwiched between the attachment member 33 and the yoke 31.
Further, the four corners of the yoke 31 are notched portions 321 for securing a space where the leg portion 333 of the mounting member 33 is located. The inner portions of the upper leaf springs 129 and 229 are fixed to the upper portion of the lens holder 27.

The yoke 31 has an inner yoke portion 361 disposed inside the first coil 21 as shown in FIGS.
Thus, since the first coil 21 is disposed so as to be sandwiched between the yoke side surface portion 371 and the inner yoke portion 361 of the yoke 31, the autofocus thrust can be increased.
Further, in the present embodiment, since the yoke 31 is provided, the thrust for moving the lens holder 27 can be increased even when the magnet 23 is used as both the autofocus mechanism 5 and the camera shake correction mechanism 7.

  As shown in FIG. 2, the insulating sheet 25 is fixed on the upper surface of the yoke ceiling 311 of the yoke 31, and the upper leaf spring 29 is fixed on the insulating sheet 25. Therefore, a short circuit between the first upper leaf spring 129 and the second upper leaf spring 229 is effectively avoided. Instead of providing the insulating sheet 25, an insulating film may be formed on the upper surface of the yoke ceiling 311 by printing or the like.

The mounting member 33 is formed into a polygonal shape with an insulating resin or the like, and is attached to the yoke ceiling portion 311 of the yoke 31 via the upper leaf spring 29 and the insulating sheet 25, and the cutout portion of the yoke 31. A leg 333 disposed at 321; The leg portion 333 protrudes downward from the frame portion 331 at the corner of the frame portion 331 having a polygonal shape (rectangular shape).
As described above with reference to FIG. 8, the first protrusion 331 a is formed on the lower surface of the frame-shaped portion 331 of the mounting member 33, and the second protrusion 333 a is formed on the lower surface of the leg portion 333. .
A through portion 171 of the lower leaf spring 17 is inserted into the second protrusion 333 a of the attachment member 33, and the lower leaf spring 17 is attached to the attachment member 33.

In the present embodiment, the first protrusion 331 a of the attachment member 33 that is integrated with the upper leaf spring 29 and fixed to the yoke 31, and the second protrusion of the attachment member 33 that is fixed to the penetration portion 171 of the lower leaf spring 17. Each of the portions 333a protrudes in the same direction (downward). Therefore, when attaching the attachment member 33 to the yoke 31 at the time of manufacture, the process of reversing the direction of the member becomes unnecessary, and productivity can be improved. It also becomes possible to increase the positioning accuracy during manufacturing.
Further, in the lens driving device 1, since the lower leaf spring 17 and the upper leaf spring 29 are both fixed to the mounting member 33, positioning can be performed easily.

Hereinafter, the operation of the lens driving device 1 will be described.
[Manufacturing process]
In the manufacturing process of the lens driving device 1, the mounting member 33 is formed by injection molding or the like so that the suspension wires 411, 412, 413, and 414 are embedded in the frame-shaped portion 331 of the mounting member 33.
When attaching the autofocus mechanism 5 unitized around the attachment member 33 to the base member 11, one end (upper end) is embedded in the frame-like portion 331 of the attachment member 33 and the suspension wires 411 and 412 extend in the Z direction. , 413, 414, the other end (lower end) of the first extending portion 81 is inserted into the notch 151 of the metal member 15, and a solder fillet 153 is formed and fixed by soldering. As a result, the autofocus mechanism 5 is supported by the first extending portions 81 of the suspension wires 411, 412, 413, and 414 so as to be movable in a direction intersecting the optical axis direction.
In this way, the suspension wires 411, 412, 413, and 414 can be handled integrally with the mounting member 33, and handling becomes easier as compared with the case where the suspension wires are handled alone.

[auto focus]
In the autofocus operation, a current is supplied to the first coil 21 so that the focus is adjusted based on the captured image corresponding to the imaging result of the light incident on the image sensor via the lens body 3.
An electromagnetic force that moves the first coil 21 and the lens holder 27 integrally along the optical axis (Z-axis) direction is generated by the electromagnetic interaction between the current flowing through the first coil 21 and the magnetic field from the magnet 23. .

[Image stabilization]
In the camera shake correction operation, the second coil 13 is energized based on position information detected by the Hall elements 462, 463 and the like. The second coil 13 is configured to be able to supply current independently to the pair of coils extending in the X direction and the pair of coils extending in the Y direction.
When the second coil 13 is energized, the lens holder 27 and the autofocus mechanism 5 are generally moved along the X and Y directions by electromagnetic interaction between the current flowing through the second coil 13 and the magnetic field from the magnet 23. Electromagnetic force to move is generated.

  As described above, according to the lens driving device 1, the attachment member 33 is formed so that the second extending portion 83 of the suspension wires 411, 412, 413, and 414 is embedded in the frame-shaped portion 331. The suspension wires 411, 412, 413, and 414 that are difficult to handle are not handled alone. Thereby, a manufacturing process can be simplified and a yield can be improved.

  Further, according to the lens driving device 1, the second extending portion 83 that intersects the first extending portion 81 so as to be substantially orthogonal is embedded in the mounting member 33. The second extending portion 83 has a plurality of bent portions. Therefore, the suspension wire 41 (411 to 414) can be hardly detached from the attachment member 33.

  Further, according to the lens driving device 1, a part of the second extending portion 83 of the suspension wires 411, 412 is partly outside (lower surface) facing the first upper leaf spring 129 and the second upper leaf spring 229. The frame-shaped portion 331 of the mounting member 33 is configured so as to be embedded in a state where it is exposed to the surface. Thereby, even if the suspension wires 411 and 412 are embedded in the frame-shaped portion 331, the first upper leaf spring 129 and the second upper leaf spring 229 can be easily energized and connected by soldering or the like. Therefore, power can be supplied to the first coil 21 via the two suspension wires 411 and 412.

In the lens driving device 1, the other end of the first extending portion 81 of the suspension wire 41 is fixed to the notch portion 151 of the metal member 15 by soldering.
According to this configuration, the suspension wire 41 can be reliably supported. Moreover, since the solder fillet 153 is formed on the lower surface side of the metal member 15, the elasticity of the suspension wires 411, 412, 413, and 414 is not hindered.

  Further, according to the lens driving device 1, since the second coil 13 is disposed near the center of the four sides of the base member 11, the positioning of the second coil 13 is facilitated, and the manufacturing process can be simplified.

  Further, according to the lens driving device 1, the first protrusion 331 a of the attachment member 33 that is fixed to the yoke 31 integrally with the upper leaf spring 29 and the attachment member that is fixed to the through portion 171 of the lower leaf spring 17. 33 second protrusions 333a protrude in the same direction (downward). Therefore, when attaching the attachment member 33 to the yoke 31 at the time of manufacture, the process of reversing the direction of the member becomes unnecessary, and productivity can be improved. It also becomes possible to increase the positioning accuracy during manufacturing.

The present invention is not limited to the embodiment described above.
That is, those skilled in the art may make various modifications, combinations, subcombinations, and alternatives regarding the components of the above-described embodiments within the technical scope of the present invention or an equivalent scope thereof.
In the above-described embodiment, the case where the first coil 21 moves in the optical axis direction integrally with the lens holder 27 has been exemplified. However, the magnet may move integrally with the lens holder 27.

  Further, the suspension wires 411, 412, 413, and 414 of the above-described embodiment have the first extending portion 81 extending in the optical axis direction and the second extending portion 83 extending in a direction substantially orthogonal thereto. However, the angle formed by the first extending portion 81 and the second extending portion 83 may be other than 90 degrees, and the first extending portion 81 extends in a direction other than the optical axis direction. May be.

  Moreover, although the case where the 2nd extension part 83 which has a some bending part was used was illustrated in embodiment mentioned above, you may use the linear 2nd extension part 83 without a bending part.

  In the above-described embodiment, the case where the four suspension wires 411, 412, 413, and 414 are used is illustrated, but the number of suspension wires is not particularly limited.

  In the above-described embodiment, the case where the first upper leaf spring 129 and the second upper leaf spring 229 are physically separated is illustrated. However, if the first upper leaf spring 129 and the second upper leaf spring 229 are electrically separated, they are configured as one module. May be.

  In the above-described embodiment, the case where the autofocus mechanism 5 and the camera shake correction mechanism 7 share the magnet 23 has been exemplified. However, different magnets may be used corresponding to each.

Further, in the above-described embodiment, the case where the yoke and the attachment member are rectangular is illustrated, but the present invention is not particularly limited as long as the yoke and the attachment member are polygonal.
Further, in the above-described embodiment, the case where the yoke is provided is illustrated, but a configuration without the yoke may be employed. In this case, a projection for attaching the upper leaf spring 29 to the upper surface of the frame-shaped portion 331 of the attachment member 33 can be configured to protrude upward.

  The present invention is applicable to a lens driving device using a suspension wire.

DESCRIPTION OF SYMBOLS 1 ... Lens drive device 3 ... Lens body 11 ... Base member 13 ... 2nd coil 15 ... Metal member 151 ... Notch part 17 ... Lower leaf | plate spring 21 ... 1st coil 23 ... Magnet 25 ... Insulating sheet 27 ... Lens holder DESCRIPTION OF SYMBOLS 29 ... Upper leaf | plate spring 129 ... 1st upper leaf | plate spring 229 ... 2nd upper leaf | plate spring 31 ... Yoke 311 ... Yoke ceiling part 313 ... Through part 321 ... Notch part 361 ... Inner yoke part 371 ... Yoke side part 373 ... Yoke ceiling part 33 ... Mounting member (top cover)
331 ... Frame-shaped portion 331a ... First protrusion 333 ... Leg 333a ... Second protrusion 35 ... Case 411,412,413,414 ... Suspension wire 81 ... First extending portion 83 ... Second extending portion

Claims (9)

A lens holder capable of holding a lens body, an autofocus mechanism for moving the lens holder along the optical axis direction, and a camera shake correction mechanism for moving the lens holder and the autofocus mechanism in a direction crossing the optical axis direction A lens driving device comprising:
A plurality of suspension wires that movably support the autofocus mechanism in a direction intersecting the optical axis direction;
The suspension wire extends linearly and supports a first extending portion that supports the autofocus mechanism, and a second extending from one end of the first extending portion in a direction different from the first extending portion. And an extending portion of
The lens drive device, wherein the two extending portions are embedded in an attachment member that moves together with the lens holder in a direction intersecting the optical axis direction. The first extension part of the suspension wire extends along the optical axis direction, and the second extension part extends so as to intersect the optical axis direction. Lens drive device. The lens driving device according to claim 1, wherein the second extending portion has a plurality of bent portions, and the bent portions are embedded in the attachment member. The lens holder is fixed so as to be sandwiched between the upper and lower plate springs from both sides in the vertical direction,
The mounting member has a frame-like portion that fixes the upper leaf spring,
The lens driving device according to claim 1, wherein the second extending portion of the suspension wire is embedded in the frame-shaped portion. The upper leaf spring has two separate first upper leaf springs and second upper leaf springs,
A first coil for generating an electromagnetic force for moving the lens holder in the optical axis direction is fixed to the lens holder, and one end of the first coil is conductively connected to the first upper leaf spring, The other end of the first coil is conductively connected to the second upper leaf spring;
The lens driving device according to claim 4, wherein the first suspension wire is conductively connected to the first upper leaf spring, and the second suspension wire is conductively connected to the second upper leaf spring. The frame-shaped part is in a state where a part of the second extension part of the first suspension wire and a part of the second extension part of the second suspension wire are exposed to the outside. Burying the first suspension wire and the second suspension wire;
The part of the second extension part of the first suspension wire is electrically connected to the first upper leaf spring, and the part of the second extension part of the second suspension wire is connected to the part of the second extension part. The lens driving device according to claim 5, wherein the lens driving device is electrically connected to the second upper leaf spring. A base member having a plurality of metal members,
The lens driving device according to claim 1, wherein the other end of the first extending portion of the suspension wire is fixed to the metal member. A yoke integrated with the mounting member;
The attachment member is formed in a polygonal shape, the frame-like portion is located on a side of the polygon, and has a leg portion that protrudes downward at a corner portion of the polygon,
A first protrusion is provided on the lower surface of the frame-shaped portion of the mounting member for fixing the upper leaf spring;
A penetrating portion of the upper plate spring and a penetrating portion of the yoke are inserted into the first protrusion, and the upper plate spring and the yoke are fixed to the frame-shaped portion of the mounting member;
A second protrusion is provided on the lower surface of the leg that fixes the lower leaf spring,
The lens driving device according to any one of claims 4 to 6, wherein a penetrating portion of the lower leaf spring is inserted into the second protrusion, and the lower leaf spring is fixed to the leg portion. A first coil for generating an electromagnetic force for moving the lens holder in the optical axis direction;
A magnet that is positioned outside the first coil so as to face the first coil and generates a magnetic field that generates an electromagnetic force in the optical axis direction due to electromagnetic interaction with the current flowing through the first coil. When,
A second coil for passing a current that generates an electromagnetic force in a direction intersecting the optical axis direction by electromagnetic interaction with a magnetic field generated by the magnet,
The first coil is located on the outer periphery of the lens holder and moves integrally with the lens holder,
The lens driving device according to claim 1, wherein the second coil is disposed below the magnet.

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