JP6029830B2 - Lens drive device - Google Patents

Description

  The present invention relates to a lens driving device that corrects image blur by moving an imaging optical system in a direction orthogonal to an optical axis.

  Conventionally, there is JP, 2011-39481, A as a technique of such a field. A lens driving device described in this publication includes a lens holder that holds a lens, a housing in which the lens holder can be displaced in the optical axis direction of the lens, and a drive unit that displaces the lens holder in the optical axis direction. It has. The coils constituting the drive unit are arranged in columnar portions provided at the respective corners in the casing, and the magnet is arranged in the outer edge portion of the lens holder facing the columnar portions in the casing. According to such an arrangement of the coil and the magnet, the driving unit is arranged in a region formed between the outer edge portion of the lens holder and the corner portion of the housing. Therefore, the size in the width direction of the housing can be reduced, and the lens driving device is downsized.

JP 2011-39481 A

  An image blur correction function for correcting image blur by moving a lens in a direction orthogonal to the optical axis is required for a small lens driving device mounted on a portable communication device or the like. However, when an image blur correction drive unit composed of a coil and a magnet is added to the lens drive device described in Patent Document 1, the lens drive device is reduced in size, so that the drive for driving the lens holder is performed. There is a possibility that the distance between the magnet of the part and the magnet of the driving part for image blur correction becomes short, and magnetic interference may occur.

  In addition, the movement accuracy of the lens holder in the optical axis direction in the lens driving device described in Patent Document 1 depends on the accuracy of the direction of the driving force generated by the driving unit for driving the lens holder. Therefore, if a driving force is generated in a state where magnetic interference occurs, the driving force acts on the lens holder in an unintended direction, and the lens holder may tilt or move in an unintended direction. It is difficult to control the driving force between the drive unit for driving the holder and the drive unit for image blur correction, and there is a problem that the accuracy of focus adjustment and image blur correction is reduced.

  SUMMARY An advantage of some aspects of the invention is that it provides a lens driving device that can perform accurate focus adjustment and image blur correction.

The lens driving device according to the present invention includes a base member, a movable member that is disposed on the base member and is movable in accordance with image shake in a plane orthogonal to the optical axis, the movable member, and the base member with a coil provided on the other of said base member and the magnet and the movable member provided on one of a first actuator for moving in a plane perpendicular to said movable member relative to said optical axis, said movable A lens frame attached to the member and movable in the direction of the optical axis; a restricting surface provided between the base member and the movable member and extending in a direction perpendicular to the optical axis; a regulating means and a sliding portion containing the abutting curved surface with the regulating surface, relative to the movable member, and guide means for guiding the lens frame in the direction of the optical axis, the lens frame and the movable member A magnet provided on one side, a movable member and a coil provided on the other side of the lens frame, a plurality of second actuators for moving the lens frame in the direction of the optical axis, and the lens frame being movable. Biasing means for biasing to the member side, the guide member is disposed on the movable member in the vicinity of the restricting means, and the plurality of second actuators in the plan view Arranged non-uniformly on the circumference around the optical axis, and arranged in a mirror-symmetrical relationship with respect to a reference line passing through the optical axis, the biasing means and the guide means in plan view Are arranged on the reference line .

  According to the lens driving device described above, since the lens frame is guided in the direction of the optical axis by the guide means, the lens frame is prevented from being inclined with respect to a plane orthogonal to the optical axis. And a movable member is controlled so that the freedom degree of translation may become one by the control surface and sliding part of a control means. In addition, since the guide means is disposed in the vicinity of the restricting means, the reference for moving the lens frame does not greatly deviate from the reference for moving the movable member. Therefore, the movement of the lens frame can be easily controlled, and accurate focus adjustment and image blur correction can be performed.

  The regulating surface is provided on the movable member, the sliding portion is mounted on the base member, and the guide means is fixed on an extension line of the linear movement locus. With such a configuration, even if the movable member moves due to image blur correction, the lens frame movement reference matches the linear movement locus of the movable member, so that the movement of the lens frame can be more easily controlled. Accurate focus adjustment and image blur correction can be performed.

A plurality of second actuators each including a magnet provided on one of the movable member and the lens frame, a coil provided on the other of the movable member and the lens frame, and moving the lens frame in the direction of the optical axis; Biasing means for biasing the movable member to the movable member side, and the plurality of actuators are non-uniformly arranged on the circumference around the optical axis in plan view and include a reference including the optical axis The urging means and the guide means are arranged on the reference line in plan view.

  Thus, since the actuators are unevenly arranged, the degree of freedom in designing the actuator arrangement is increased, and the lens driving device can be downsized. In addition, the actuator is arranged non-uniformly on the circumference around the optical axis, and the lens frame has a driving force for moving the lens frame in the optical axis direction and a lens frame with respect to a plane orthogonal to the optical axis. And a driving force for tilting is applied. On the other hand, since the urging means is disposed on the reference line including the optical axis, the urging force can be applied to the lens frame in a direction that cancels the driving force for inclining the lens frame. Therefore, the lens frame can be accurately moved in the optical axis direction by the guide means arranged on the reference line, and accurate focus adjustment can be performed.

  According to the present invention, accurate focus adjustment and image blur correction can be performed.

1 is an exploded view showing a first embodiment of a lens driving device according to the present invention. It is a top view of the lens drive device from which the lid member was removed. It is sectional drawing which shows the internal structure of a lens drive device. It is a top view of the base member of a lens drive device. It is a bottom view of the movable member of a lens drive device. It is a perspective view which shows the focus adjustment mechanism of the lens drive device which concerns on 2nd Embodiment. It is sectional drawing which follows the VII-VII line of FIG. It is a perspective view which shows the focus adjustment mechanism of the lens drive device which concerns on 3rd Embodiment. It is sectional drawing which follows the IX-IX line of FIG. It is a perspective view which shows the focus adjustment mechanism of the lens drive device which concerns on 4th Embodiment. It is sectional drawing which follows the XI-XI line of FIG.

  Hereinafter, a preferred embodiment of a lens driving device according to the present invention will be described in detail with reference to the drawings.

[First embodiment]
As shown in FIG. 1, a lens driving device 1 having a camera shake correction function includes a box-shaped base member 2 that houses a camera shake correction mechanism 3 and a focus adjustment mechanism 4, and the focus adjustment mechanism 4 is orthogonal to the optical axis C. A camera shake correction mechanism 3 that moves in a plane to correct camera shake, a lens (not shown), a focus adjustment mechanism 4 that moves the lens in the direction of the optical axis C, and a lid for closing the base member 2 And a member 5. The lens driving device 1 is used by being disposed in front of a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor (not shown) which is an image sensor.

  The above-described base member 2 and the camera shake correction mechanism 3 constitute a camera shake correction device 30. The camera shake correction is an aspect of image shake correction for correcting image shake.

  The base member 2 is a rectangular parallelepiped box-shaped member having a rectangular opening 2 a centered on the optical axis C. Inside the base member 2, a support surface 2b extending perpendicular to the optical axis C is provided. The support surface 2b is provided with recesses 2c and 2g. The recess 2c is arranged around a circular opening 2d centered on the optical axis C. The recess 2g is adjacent to the opening 2d near the corner 2h. It arrange | positions between the corner | angular parts 2h (refer FIG. 4).

  The camera shake correction mechanism 3 is for correcting camera shake by moving the focus adjustment mechanism 4 attached to the movable member 10 within a plane orthogonal to the optical axis C. The camera shake correction mechanism 3 includes a supporting unit 8 that forms a ball for supporting the movable member 10 having a frame shape, a movable member 10 to which the focus adjusting mechanism 4 is attached, and the movable member 10 in a direction orthogonal to the optical axis C. The movable member drive means 11 to be driven and the restriction means 15 (see FIG. 5) for restricting the movement of the movable member 10 in the base member 2 are provided.

  The support means 8 for movably supporting the movable member 10 in a plane orthogonal to the optical axis C includes three metal spherical bodies 9a, 9b, 9c. The spherical body 9a is disposed in the recess 2g of the base member 2, and the spherical bodies 9b and 9c are disposed in the recess 2c (see FIG. 4).

  A movable member 10 for moving the focus adjustment mechanism 4 in a direction orthogonal to the optical axis C is housed inside the base member 2 while being supported by the support means 8. The movable member 10 has a circular opening 10a centered on the optical axis C. The movable member 10 has a bottom surface 10 c that faces the support surface 2 b of the base member 2.

  On the bottom surface 10c of the movable member 10, a recess 10d is provided at a position corresponding to the recess 2c of the base member 2 (see FIG. 5). The inner diameters of the recesses 2c and 10d are formed larger than the outer diameter of the spherical bodies 9b and 9c. For this reason, the spherical bodies 9b and 9c can roll within the range of the recesses 2c and 10d.

  The movable member driving means 11 for driving the movable member 10 in a direction orthogonal to the optical axis C includes three actuators 12, 13, and 14. As shown in FIG. 5, the actuator 12 and a groove 10 b described later are disposed on the diagonal line L <b> 1. The actuator 12 and the groove 10b are provided to face each other across the intersection of the diagonal line L1 and the diagonal line L2. The actuator 12 applies a driving force F1 having a directional component along the diagonal line L1 to the movable member 10.

  Actuators 13 and 14 are arranged on another diagonal L2 orthogonal to the diagonal L1. The actuators 13 and 14 are provided to face each other with an intersection point between the diagonal line L1 and the diagonal line L2. The actuators 13 and 14 apply a driving force F2 having a directional component along the diagonal L2 to the movable member 10.

  The actuators 12, 13, and 14 have the same configuration. Here, the configuration of the actuator 12 will be described as an example. As shown in FIG. 1, the actuator 12 includes a magnet 12a and a coil 12b. The magnet 12a is disposed in the recess 10r on the bottom surface 10c of the movable member 10 (see FIG. 5), and the coil 12b is disposed in the recess 2p formed on the support surface 2b of the base member 2 (see FIG. 4). The magnet 12a is disposed so as to face the coil 12b.

  As shown in FIGS. 3, 4, and 5, the restricting means 15 for restricting the movement of the movable member 10 is provided on the movable member 10 and a spherical body (sliding portion) 9 a constituting the support means 8. And the groove 10b formed. The spherical body 9a is disposed between the recess 2g provided on the support surface 2b of the base member 2 and the groove 10b provided on the bottom surface 10c of the movable member 10, and is formed on the side wall surface (regulating surface) 10t of the groove 10b. Abut.

  The groove 10 b is a long groove extending along the diagonal line L <b> 1 in the movable member 10. The groove 10b is provided on the bottom surface 10c at a position corresponding to the position of the recess 2g of the base member 2 where the spherical body 9a is disposed. The width in the direction orthogonal to the longitudinal direction of the groove 10b is set to a width that allows the spherical body 9a to slide relative to the side wall surface 10t of the groove 10b.

  According to the regulating means 15 having such a configuration, the movable member 10 can be linearly moved while being guided in the direction of the linear movement locus T1 set in the direction in which the side wall surface 10t of the groove 10b extends. It can rotate along a rotational movement locus T2 having a spherical body 9a arranged on the linear movement locus T1 as a rotation center RC. That is, the position of the movable member 10 corresponds to being expressed in a circular coordinate system based on one moving radius and one deflection angle. According to this combination of linear movement and rotation, the position of the optical axis C can be accurately moved to a desired position. Further, by inserting the spherical body 9a into the groove 10b, the movable member 10 is smoothly guided in the direction of the linear movement trajectory T1 and rotates around the spherical body 9a. Therefore, the movement of the movable member 10 can be made highly accurate.

  The movable range S of the optical axis C is based on a distance allowing linear movement and an angle allowing rotation. The distance at which the movable member 10 can move linearly and the angle at which the movable member 10 can rotate are determined by the gap between the inner wall surface 2s of the base member 2 and the outer peripheral surface 10s of the movable member 10 (see FIG. 2). . Note that the distance at which the movable member 10 can be linearly moved may be determined by the length of the groove 10b in the longitudinal direction. Further, the rotatable angle of the movable member 10 may be regulated by sandwiching the spherical bodies 9b and 9c between the wall surface of the recess 2c and the wall surface of the recess 10d in a direction orthogonal to the optical axis C.

  As shown in FIG. 1, the focus adjustment mechanism 4 attached to the movable member 10 includes a lens frame 16 that holds a lens (not shown), and a lens frame driving unit that drives the lens frame 16 in the direction of the optical axis C. 19.

  The lens frame 16 for holding a lens group (not shown) having a single lens or a plurality of lenses is a cylindrical member having a hole 16a into which the lens is fitted. The optical axis C is the optical axis of the lens disposed in the lens frame 16.

  As shown in FIGS. 1 and 2, the lens frame driving means 19 for driving the lens frame 16 in the direction of the optical axis C includes two actuators 22. Each actuator 22 is arranged with a phase angle of 90 degrees around the optical axis C on the circumference around the optical axis C, and is mirror-symmetric with respect to the reference line L3 including the optical axis C. It is arranged with. The reference line L3 is also a line that passes through the optical axis C and connects a center of a guide shaft 18a described later and a center of the guide shaft 18b.

  Each actuator 22 having the same configuration includes a magnet 22a and a coil 22b. Each magnet 22 a is fixed to the standing portion 10 u of the movable member 10. Since the upright portions 10u are formed with a phase angle of 90 degrees around the optical axis C on the circumference around the optical axis C, each magnet 22a has a circular shape around the optical axis C. On the circumference, it is arranged around the optical axis C with a phase angle of 90 degrees.

  Moreover, each coil 22b is being fixed to the plane part 16h provided in the outer periphery of the lens frame 16 so that the magnet 22a may be faced. Since the planar portion 16h is formed with a phase angle of 90 degrees around the optical axis C on the circumference around the optical axis C, each coil 22b has a circumference around the optical axis C. Above, it is arranged around the optical axis C with a phase angle of 90 degrees.

  The plate-like lid member 5 disposed on the opening-side edge 2 f of the base member 2 has a circular opening 5 a centered on the optical axis C. The screw 28 inserted into the through-hole 5b disposed opposite to the optical axis C is screwed into the screw hole 2t provided in the base member 2, so that the lid member 5 is fixed to the base member 2. Yes.

  The lid member 5 is provided with two Hall elements 27 that are magnetic field detection elements. The hall element 27 detects the magnetic field of the magnet 22 a disposed on the movable member 10. The hall element 27 is arranged with a phase angle of 90 degrees around the optical axis C in a plane orthogonal to the optical axis C. Therefore, the position of the movable member 10 in the plane orthogonal to the optical axis C can be detected, and the position of the movable member 10 can be controlled based on the orthogonal coordinate system.

  As shown in FIGS. 2 and 3, the guide unit 40 that guides the lens frame 16 in the direction of the optical axis C is disposed in the vicinity of the regulating unit 15 on the movable member 10. The guide means 40 is erected on the movable member 10 and has a guide shaft 18a extending in the direction of the optical axis C and a through hole 16c into which the guide shaft 18a is inserted while projecting radially from the periphery of the lens frame 16. And a protruding portion 16e.

  The guide shaft 18a is inserted and fixed in the hole 10y of the movable member 10 provided on the extension line of the linear movement locus T1 that coincides with the reference line L3 in plan view (see FIG. 2). Moreover, the diameter of the guide shaft 18a is set to a diameter that can slide with respect to the through hole 16c. Therefore, the lens frame 16 can be reliably guided in the direction of the optical axis C by the guide shaft 18 a of the guide means 40.

  The lens frame 16 is urged toward the movable member 10 by a compression coil spring (biasing means) 18d. A protrusion 16e is inserted into the compression coil spring 18d, and the center of the compression coil spring 18d is the through hole 16c. It coincides with the center. Therefore, the compression coil spring 18d is also disposed on the reference line L3 in plan view.

  The compression coil spring 18d is disposed in the spring accommodating portion 10k provided upright on the movable member 10, and the upper end 18e of the compression coil spring 18d provided in the spring accommodating portion 10k abuts on the spring contact piece 10j of the movable member 10, and the lower end. 18 f is in contact with the seating surface 16 j of the lens frame 16. With such a configuration, the compression coil spring 18d is compressed in the direction of the optical axis C within the spring accommodating portion 10k, and biases the lens frame 16 toward the movable member 10.

  A rotation restricting shaft 18b is disposed at a position facing the guide shaft 18a across the optical axis C. The rotation restricting shaft 18b is inserted and fixed in a hole 10z provided in the movable member 10, and the rotation restricting shaft 18b is fixed. The shaft 18b is disposed on an extension line of the linear movement locus T1 that coincides with the reference line L3 in plan view.

  The lens frame 16 is provided with a protrusion 16e that protrudes in the radial direction from the outer peripheral surface, and the rotation restricting shaft 18b is a groove 16d of the protrusion 16b provided at a position facing the protrusion 16e with the optical axis C interposed therebetween. Has been inserted. The groove 16d is a long groove extending in the direction of the reference line L3, and the width of the groove 16d is set such that the shaft 18b can slide along the groove 16d.

  The rotation of the lens frame 16 about the optical axis C can be regulated by the shaft 18b and the groove 16d. Accordingly, since the movement of the lens frame 16 in the direction of the optical axis C is defined by the cooperation of the guide shaft 18a and the through hole 16c, the lens frame 16 can be easily and reliably guided in the direction of the optical axis C. Can do.

  Next, the operation of the camera shake correction mechanism 3 will be described. If camera shake occurs when shooting with a device (for example, a camera) in which the lens driving device 1 is incorporated, the position of the optical axis C may change. In this case, a sensor that detects camera shake, such as a gyro sensor, detects camera shake, and the control means (not shown) controls the camera shake correction mechanism 3 so that the position of the optical axis C on the image sensor is maintained at a predetermined position. A control signal for driving is output to the coils 12b of the actuators 12, 13, and 14.

  In this case, as shown in FIG. 5, when the actuator 12 receives the control signal, the actuator 12 generates the driving force F1 and linearly moves the movable member 10 in the direction of the linear movement locus T1. When receiving the control signal, the actuators 13 and 14 generate the driving force F2 and rotate the movable member 10 in the direction of the rotational movement locus T2. By this linear movement and rotation, the position of the optical axis C is moved to a predetermined position. At this time, since the movement of the movable member 10 is restricted by the restriction means 15, the movable member 10 has two degrees of freedom, which is a total of one degree of freedom by linear movement and one degree of freedom by rotation. For this reason, the movable member 10 can move the position of the optical axis C to a desired position within the range S. By this movement, the position of the optical axis C on the image sensor (for example, CMOS) is maintained at a predetermined position, and camera shake is corrected.

  In the lens driving device 1 having such a configuration, the lens frame 16 is guided in the direction of the optical axis C by the guide means 40 including the guide shaft 18a and the through hole 16c disposed in the vicinity of the restricting means 15. The lens frame 16 is prevented from being inclined with respect to a plane perpendicular to the optical axis C. The movable member 10 is restricted by the side wall surface 10t and the spherical body 9a so that the degree of freedom of translation becomes one. Further, since the guide unit 40 is disposed in the vicinity of the regulating unit 15, the movement reference of the lens frame 16 does not greatly deviate from the movement reference of the movable member 10. Therefore, the movement of the lens frame 16 can be easily controlled, and accurate focus adjustment and image blur correction can be performed.

  In addition, since the camera shake correction mechanism 3 includes the restricting unit 15, the movement of the movable member 10 is restricted to a linear movement along a linear movement locus T 1 orthogonal to the optical axis C. Therefore, accurate camera shake correction can be performed.

  Further, since the lens driving device 1 does not require an actuator or the like for correcting the movement of the movable member 10 due to unnecessary rotation, the lens driving device 1 can be reduced in size without increasing the number of parts constituting the lens driving device 1. Contributes to

  Further, the regulation surface 10t is provided on the movable member 10, the sliding portion 9a is mounted on the base member 2, and the guide means 40 is fixed on an extension line of the linear movement locus T1. With such a configuration, even if the movable member 10 moves due to image blur correction, the movement reference of the lens frame 16 matches the linear movement locus T1 of the movable member 10, so that the movement of the lens frame 16 can be controlled more easily. Therefore, accurate focus adjustment and image blur correction can be performed.

  Since the actuators 22 are unevenly arranged on the circumference with the optical axis C as the center, the degree of freedom in design with respect to the arrangement of the actuators 22 is increased, and the lens driving device 1 can be downsized. Further, due to the arrangement of the actuator 22, the lens frame 16 has a driving force for moving the lens frame 16 in the direction of the optical axis C and a driving force for tilting the lens frame 16 with respect to a plane orthogonal to the optical axis C. Will be applied. On the other hand, since the compression coil spring 18d is disposed on the reference line L3, a biasing force can be applied to the lens frame 16 in a direction that cancels the driving force that tilts the lens frame 16. Therefore, the lens frame 16 can be accurately moved in the direction of the optical axis C by the guide means 40 disposed on the reference line L3, and accurate focus adjustment can be performed.

[Second Embodiment]
6 and 7, the focus adjustment mechanism 50 of the lens driving device according to the second embodiment is biased compared to the focus adjustment mechanism 4 of the lens driving device 1 according to the first embodiment. The difference is that the means is constituted by a tension coil spring 51. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The tension coil spring 51 disposed in the vicinity of the guide means 40 is disposed between the guide shaft 18a and the corner 10h of the movable member 10, and the reference line L3 and the central axis of the tension coil spring 51 intersect. One hook portion 51 a of the tension coil spring 51 is hooked on a hook portion 10 g standing on the movable member 10, and the other hook portion 51 b is hooked on a hook portion 16 g provided on the lens frame 16. With such a configuration, the tension coil spring 51 is extended in the direction of the optical axis C, and a biasing force that biases the lens frame 16 toward the movable member 10 can be applied to the lens frame 16.

  Also in the lens driving device including the focus adjustment mechanism 50 having such a configuration, the same effect as that of the lens driving device 1 according to the first embodiment can be obtained.

[Third Embodiment]
As shown in FIGS. 8 and 9, the focus adjustment mechanism 60 of the lens driving device according to the third embodiment is biased compared to the focus adjustment mechanism 4 of the lens driving device 1 according to the first embodiment. The difference is that the means is constituted by a leaf spring 61. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The leaf spring 61 bridges the elastic deformation portions 63a and 63b having an S-shape in a plane orthogonal to the optical axis C, and the distal end of the elastic deformation portion 63a and the distal end of the elastic deformation portion 63b. An urging portion 63c that is brought into contact with the upper surface of the protruding portion 16e, and a base portion 63d that is fixed to the corner portion 10h of the movable member 10 across the base end of the elastic deformation portion 63a and the base end of the elastic deformation portion 63b. ,have. The plate spring 61 having such a configuration has a hollow shape, and the tip of the guide shaft 18a protrudes from the hollow portion 63e (see FIG. 9). And the leaf | plate spring 61 arrange | positioned in the vicinity of the guide means 40 is arrange | positioned at the corner | angular part 10h so that the centerline may overlap with the reference line L3.

  The leaf spring 61 is formed symmetrically about a reference line L3 that connects the centers of the guide shafts 18a and 18b. Then, by arranging the elastic portions 63a and 63b symmetrically with respect to the reference line L3, the force point at which the biasing force acts can be set on the reference line L3, and the lens frame 16 is biased toward the movable member 10 side. The force can be reliably applied to the lens frame 16.

  Also in the lens driving device including the focus adjustment mechanism 60 having such a configuration, the same effect as that of the lens driving device 1 according to the first embodiment can be obtained.

[Fourth Embodiment]
As shown in FIGS. 10 and 11, the focus adjustment mechanism 70 of the lens driving device according to the fourth embodiment is biased compared to the focus adjustment mechanism 4 of the lens driving device 1 according to the first embodiment. The difference is that the means is composed of a magnet. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The focus adjusting mechanism 70 uses an urging means 73 having a pair of two block-shaped magnets 71 and 72 arranged to face each other in the direction of the optical axis C. Among the magnets 71 and 72 arranged in the vicinity of the guide means 40, one magnet 71 is fixed to the lens frame 16, the other magnet 72 is fixed to the movable member 10, and the magnet 71 and the magnet 72 are between them. The magnetic attraction force is arranged in the direction of the optical axis C. This magnetic attraction force biases the lens frame 16 in the direction opposite to the driving force of the lens frame driving means 19 (see FIG. 1). In the plan view, the center of the urging means 73 is located on the reference line L3.

  Also in the lens driving device including the focus adjustment mechanism 70 having such a configuration, the same effect as that of the lens driving device 1 according to the first embodiment can be obtained.

  The present invention is not limited to the embodiment described above.

  The restricting means 15 for restricting the movable member 10 to linear movement along the linear movement locus T1 and rotation along the rotational movement locus T2 having a point on the linear movement locus T1 as the rotation center RC is the optical axis C. It is sufficient that the sliding portion having a circular plan view and a regulating surface that extends in a direction orthogonal to the optical axis C and abuts against the sliding portion are configured, and does not deviate from this configuration. Various forms can be adopted within a range.

  The regulating means 15 may be configured by arranging a spherical body 9a or a pin in a groove having a trapezoidal cross section. Further, a spherical body 9a or a pin may be arranged in a groove having a pair of slopes forming a V shape. According to these structures, since the pin or the spherical body 9a and the groove are in point contact, the frictional resistance can be reduced.

  Further, the regulating means 15 may be configured by arranging a pin in a through hole having a rectangular cross section. Since the pin is in line contact with the wall surface of the through hole, the movable member 10 can be prevented from tilting with respect to a plane orthogonal to the optical axis C. Moreover, a pin may be arrange | positioned and comprised in the through-hole which has a pair of inclined surface which makes V shape. Since the pin makes point contact with the pair of slopes, the frictional resistance can be reduced. Further, the spherical body 9a may be arranged in a through hole having a rectangular cross section or a through hole having a pair of slopes having a V shape.

  The groove 10b may be provided with a protrusion having a spherical shape in contact with the groove 10b. Since the protruding portion makes point contact with the movable member 10, the frictional resistance can be reduced.

  In the restricting means 15, a pin may be fixed to the movable member 10, and the groove 10 b may be formed in the base member 2. Further, the pin may not be a member separate from the base member 2 or the movable member 10, and may be formed integrally with the base member 2 or the movable member 10.

  The lens frame 16 of the focus adjustment mechanism 4 has a focus adjustment lens for focus adjustment, but may have a zoom lens for angle of view adjustment.

  The guide shaft 18a is separate from the movable member 10, but may be integrated. The actuator 22 that drives the lens frame 16 is disposed around the optical axis C with a phase angle of 90 degrees, but may be wound around the outer periphery of the lens frame 16.

DESCRIPTION OF SYMBOLS 1 ... Lens drive device, 2 ... Base member, 3 ... Camera shake correction mechanism, 4 ... Focus adjustment mechanism, 5 ... Cover member, 8 ... Support means, 9a ... Spherical body (sliding part), 10 ... Movable member, 10b ... Groove, 10t ... sidewall surface (regulating surface), 15 ... regulating means, 16 ... lens frame, 18a ... guide shaft, 18d ... compression coil spring (biasing means), 22 ... actuator, 22a ... magnet, 22b ... coil, 30 ... Camera shake correction device, 40: guide means, C: optical axis, T1: linear movement locus, T2: rotational movement locus, RC: rotation center, L1: diagonal line, L3: reference line.

Claims (2)

A base member;
A movable member disposed on the base member and movable in accordance with image blur in a plane perpendicular to the optical axis;
The movable member includes a magnet provided on one of the movable member and the base member and a coil provided on the other of the movable member and the base member, and moves the movable member in a plane orthogonal to the optical axis. A first actuator;
A lens frame attached to the movable member and movable in the direction of the optical axis;
A regulating means provided between the base member and the movable member and having a regulating surface extending in a direction orthogonal to the optical axis, and a sliding portion including a curved surface contacting the regulating surface;
Guide means for guiding the lens frame in the direction of the optical axis with respect to the movable member;
A plurality of second actuators including a magnet provided on one of the movable member and the lens frame, and a coil provided on the other of the movable member and the lens frame, and moving the lens frame in the direction of the optical axis. When,
Biasing means for biasing the lens frame toward the movable member ;
In the movable member, the guide means is disposed in the vicinity of the regulating means,
The plurality of second actuators are non-uniformly arranged on a circumference around the optical axis in a plan view, and are arranged in a mirror-symmetrical relationship with respect to a reference line passing through the optical axis, The lens driving device according to claim 1, wherein the urging unit and the guide unit are disposed on the reference line in a plan view . The restricting surface is provided on the movable member, the sliding portion is mounted on the base member, and the guide means is linearly moved by the restricting means in a plane perpendicular to the optical axis. The lens driving device according to claim 1, wherein the lens driving device is fixed on an extended line of the locus.

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