JP5884242B2 - Actuator, lens unit, and camera - Google Patents

Description

  The present invention relates to an actuator for preventing image blur by translating or rotating an image blur correction lens of an imaging lens in a plane perpendicular to the optical axis thereof, and a lens unit and a camera using the actuator.

  In order to prevent image blur, a lens unit having a so-called camera shake correction mechanism that translates an image shake correction lens in a plane perpendicular to the optical axis by an image shake correction actuator (hereinafter referred to as an actuator) is used. Yes. As an actuator for moving such an image blur correction lens, for example, in Patent Document 1, a fixed portion, a shift movable portion supported to be movable with respect to the fixed portion, and a shift movable portion are attached. And a driving means comprising a plurality of driving magnets embedded in the fixed portion and a driving coil provided at a position corresponding to the plurality of driving magnets of the shift movable portion. A provided actuator is disclosed.

  In the actuator described in Patent Document 1, the amount of movement of the shift movable portion necessary for correcting image blur is determined by a microcomputer fixed to the fixed portion, and a control signal corresponding to the amount of movement is determined. Is sending. Such a control signal is transmitted from the microcomputer to the drive coil via a flexible substrate having one connected to the fixed portion and the other connected to the shift movable portion. However, if a flexible substrate is provided so as to connect the fixed portion and the shift movable portion in this way, accurate control of the movement of the shift movable portion becomes difficult due to the repulsive force of the flexible substrate.

  Therefore, in the actuator described in Patent Document 1, it is disclosed that the repulsive force of the flexible substrate is reduced by providing the flexible substrate with a portion bent at 90 °.

Japanese Patent Laid-Open No. 2001-100074

  However, when manufacturing the actuator as described above, the flexible substrate is bent manually by an operator. For this reason, there is a problem in that the bending accuracy is varied, the effect of reducing the repulsive force is varied, and the accurate control of the movement of the shift movable part is affected.

  The present invention has been made in view of the above problems, and provides an actuator capable of reducing the repulsive force of a flexible substrate and accurately controlling a shift movable part without being affected by the work accuracy of an operator. For the purpose.

  An actuator according to the present invention is an actuator for preventing image blur by translating or rotating an image blur correction lens, which is a part of an imaging lens, in a plane perpendicular to the optical axis thereof. A movable part to which a correction lens is attached, a movable part supporting means for supporting the movable part so that the movable part can be moved on a plane parallel to the fixed part, and a movable part attached around the correction lens. Drive that includes three drive coils and three drive magnets attached to the fixed portion so as to correspond to each of the three drive coils, and the movable portion translates or rotates with respect to the fixed portion. Means, a control means for transmitting a position command signal corresponding to the amount of movement of the movable part to the three drive coils, and provided on the fixed part corresponding to the three drive coils and capable of communicating with the control means One or more flexible boards that connect each of the two or more connectors, the driving coils, and the corresponding connectors so that they can communicate with each other, and the flexible board is connected to the driving coil at the coil side connection portion. A circumferential portion extending in the circumferential direction of the correction lens continuously with the connection portion, an axial portion bent with respect to the circumferential portion and extending substantially parallel to the optical axis of the correction lens, and an axial portion A connector-side connecting portion whose tip is connected to the connector continuously, and the flexible substrate is connected to the end portion on the opposite side of the coil-side connecting portion in the circumferential portion, or in the circumferential direction of the axial portion. A protrusion that extends in the extending direction of the circumferential portion from at least one of the edges of the edge portion, and the protrusion is in contact with a portion of the fixed portion at a part of the radially outer surface with respect to the optical axis. It is characterized by that.

  According to the present invention having the above-described configuration, in the circumferential portion of the flexible substrate, the coil-side connecting portion continuous with one is connected to the driving coil, and the protruding portion continuous with the other is supported by a part of the fixing portion. The Thereby, since the circumferential direction part and a part of it can be hold | maintained in a desired curved shape, when the moving part moves, the repulsive force of the flexible substrate which acts on a moving part can be reduced. For this reason, unlike the conventional case, a part for reducing the repulsive force of the flexible substrate is not created manually by the worker, and the repulsive force of the flexible substrate is reduced without being affected by the work accuracy of the worker. be able to.

  In the present invention, preferably, the projecting portion is formed by forming a part of the flexible substrate so as to continuously extend from the end portion on the opposite side to the coil side connection portion of the circumferential portion in the circumferential portion. Has been.

  According to the present invention having the above-described configuration, the circumferential direction portion and the protruding portion of the flexible substrate are integrally maintained in an arc shape. For this reason, the length of the part hold | maintained at circular arc shape in a flexible substrate can be ensured long, and the repulsive force of a flexible substrate can be reduced more efficiently.

  In the present invention, it is preferable that the projecting portion is continuous from the circumferential portion, extends toward the opposite side of the coil connecting portion in the circumferential direction, is folded and connected to the circumferential edge of the axial portion. It is comprised by the folding | returning part and between the circumferential direction part and the axial direction part is connected by the folding | returning part.

  According to the present invention having the above-described configuration, the circumferential portion of the flexible substrate and a part of the bent portion are integrally maintained in an arc shape. For this reason, the length of the part hold | maintained at circular arc shape in a flexible substrate can be ensured long, and the repulsive force of a flexible substrate can be reduced more efficiently.

  In the present invention, it is preferable that the flexible substrate further includes a curved portion that is curved so as to protrude in the axial direction from the circumferential portion, and that connects between the axial portion and the circumferential portion.

  In the present invention, preferably, the fixing portion is a first fixed frame member disposed on the eyepiece side, and a second fixed frame member disposed on the objective side of the first fixed frame member and supported by the first fixing member. A movable frame is disposed between the first fixed frame member and the second fixed frame member, and the connector is provided on a circuit board attached to the second fixed frame member. The connector is communicably connected to the control means via the circuit board, the circumferential portion extends along the periphery of the moving frame, and the axial portion extends toward the second fixing member. The curved portion is curved so as to be convex toward the first fixed frame member, and a part thereof is in contact with the first fixed frame member.

  According to the present invention configured as described above, since the outer peripheral surface of the curved portion is in contact with the first fixed frame member, the flexible substrate can be prevented from being displaced in the axial direction.

  A lens unit of the present invention includes a lens barrel, a plurality of imaging lenses housed in the lens barrel, and the actuator in which a part of the imaging lenses is attached to the movable portion. It is characterized by that.

  In addition, a camera according to the present invention includes a camera body and the lens unit described above.

  According to the present invention, it is possible to provide an actuator capable of reducing the repulsive force of the flexible substrate and accurately controlling the shift movable part without being affected by the work accuracy of the worker.

It is a section schematic diagram showing the composition of the camera provided with the actuator of a 1st embodiment. It is a perspective view which shows the actuator of 1st Embodiment. It is a disassembled perspective view which shows the actuator of 1st Embodiment. It is a longitudinal cross-sectional view which shows the actuator of 1st Embodiment. It is a perspective view which shows the actuator of the state which removed the 2nd fixed frame member. It is an objective side front view which shows the actuator of the state which removed the 2nd fixed frame member. FIG. 6 is an enlarged perspective view of the vicinity of the flexible substrate in FIG. 5. The flexible substrate used by 1st Embodiment is shown, (a) is a perspective view, (b) is a top view, (c) is a side view, (d) is a front view. (A) is sectional drawing which shows the magnetic field which a drive magnet exerts, (b) is a perspective view which shows a drive magnet. The graph (a) showing the relationship between the relative position of the driving coil and the driving magnet and the driving force received by the driving magnet, and the relative position of the driving coil and the driving magnet at points b to e in the graph (b) It is a figure which shows (e). It is a figure explaining the relationship between the movement of a drive magnet, and the signal output from a Hall element. It is a figure explaining the relationship between the movement of a drive magnet, and the signal output from a Hall element. It is a block diagram which shows the signal processing in a controller. It is a figure which shows the positional relationship of the drive coil arrange | positioned on the fixed frame, and the drive magnet arrange | positioned on the moving frame. It is a disassembled perspective view which shows the actuator of 2nd Embodiment. It is an objective-side front view which shows the actuator of 2nd Embodiment of the state which removed the 2nd fixed frame member. It is an expansion perspective view of the flexible substrate vicinity in the actuator of 2nd Embodiment. The flexible substrate used by 2nd Embodiment is shown, (a) is a perspective view, (b) is a top view, (c) is a side view, (d) is a front view.

Hereinafter, a camera provided with the actuator according to the first embodiment of the present invention will be described.
FIG. 1 is a schematic cross-sectional view showing a configuration of a camera provided with the actuator of the present embodiment. As shown in the figure, a camera 1 according to an embodiment of the present invention includes a lens unit 2 and a camera body 4. The lens unit 2 includes a lens barrel 6, a plurality of imaging lenses 8 disposed in the lens barrel, and an actuator that moves an image blur correction lens 12 of the imaging lenses within a predetermined plane. 10 and gyros 15a and 15b (only 15a is shown in FIG. 1) as vibration detecting means for detecting the vibration of the lens barrel 6. In the following description, the “eyepiece side” indicates the camera body 4 side (that is, the right side in FIG. 1), and the “object side” indicates the opposite side of the eyepiece side (that is, the left side in FIG. 1). .

The lens unit 2 is attached to the camera body 4 and configured to form incident light on the image sensor F.
The cylindrical lens barrel 6 holds a plurality of imaging lenses 8 therein, and allows focus adjustment by moving some imaging lenses 8.

  The camera 1 of the present embodiment detects vibrations by the gyros 15a and 15b, operates the actuator 10 based on the detected vibrations, and moves the image blur correction lens 12 within a plane orthogonal to the optical axis. The image focused on the image sensor F in the main body 4 is stabilized. In the present embodiment, piezoelectric vibration gyros are used as the gyros 15a and 15b. In the present embodiment, the image blur correction lens 12 is configured by a single lens, but may be a lens group including a plurality of lenses.

  Next, the configuration of the actuator 10 will be described with reference to FIGS. 2 to 4 show the actuator 10 of the present embodiment, FIG. 2 is a perspective view, FIG. 3 is an exploded perspective view, and FIG. 4 is a longitudinal sectional view. 5 to 7 show the actuator 10 with the second fixed frame member removed, FIG. 5 is a perspective view, FIG. 6 is a front view of the objective side, and FIG. 7 is the vicinity of the flexible substrate in FIG. It is an expansion perspective view.

  As shown in FIGS. 2 to 5, the actuator 10 includes a fixed frame 14 including a first fixed frame member 20 and a second fixed frame member 22 fixed in the lens barrel 6, and the fixed frame 14. A movable frame 16 which is a movable part supported so as to be movable relative to each other, three support balls 18 which are movable part support means for supporting the movable frame 16, and a second fixed frame member 22 of the fixed frame 14. It has flexible boards 30a, 30b, 30c for connecting connectors 24a, 24b, 24c as connecting portions provided on the board 26 and driving coils 28a, 28b, 28c provided on the moving frame 16.

  Further, the actuator 10 includes three drive magnets 32a, 32b, and 32c attached to the fixed frame 14, and three drives attached to the moving frame 16 at positions corresponding to the drive magnets 32a, 32b, and 32c. Coils 28a, 28b, 28c. Each of the driving magnets 32a, 32b, 32c is opposed to the corresponding driving coil 28a, 28b, 28c.

  These drive magnets 32a, 32b, and 32c and the three drive coils 28a, 28b, and 28c attached to the positions corresponding to these constitute a linear motor, which translates the moving frame 16 relative to the fixed frame 14. And it functions as a drive means that can be rotated.

  Furthermore, as shown in FIGS. 4 and 6, Hall elements 34a, 34b, and 34c, which are magnetic sensors, are arranged inside the windings of the drive coils 28a, 28b, and 28c. Each Hall element 34a, 34b, 34c detects the magnetism of each driving magnet 32a, 32b, 32c arranged to face each other so as to detect the position of the moving frame 16 relative to the fixed frame 14. It is configured. These Hall elements 34a, 34b, 34c and driving magnets 32a, 32b, 32c constitute position detecting means.

  Further, as shown in FIG. 1, the actuator 10 is configured so that each drive coil 28a is based on the vibration detected by the gyros 15a and 15b and the positional information of the moving frame 16 detected by the Hall elements 34a, 34b and 34c. , 28b, 28c, the controller 40 is a control means for controlling a control signal (current) to be supplied. In the present embodiment, the controller 40 is attached to the lens barrel 6.

  The actuator 10 moves the moving frame 16 in a plane parallel to the image sensor F with respect to the fixed frame 14 fixed to the lens barrel 6, and thereby an image blur correction lens attached to the moving frame 16. 12 is moved so that the image formed on the image sensor F is not disturbed even if the lens barrel 6 vibrates.

  The fixed frame 14 is disposed on the eyepiece side and is a substantially annular first fixed frame member 20 fixed to the lens barrel 6, and a column portion 20 a erected on the peripheral edge of the first fixed frame member 20. And a substantially annular second fixed frame member 22 supported by. The moving frame 16 is disposed between the first fixed frame member 20 and the second fixed frame member 22. The first fixed frame member 20 includes a flat base portion 20b formed in an annular shape, and pillar portions 20a provided at an angular interval of 120 ° in the circumferential direction around the center of the opening of the base portion 20b. . The second fixed frame member 22 is formed in an annular shape, and a circuit board 26 is attached to the objective side. On the outer periphery of the second fixed frame member 22 and the circuit board 26, cutouts for allowing the flexible boards 30a, 30b, 30c to pass are formed. An accommodation space for accommodating the moving frame 16 is formed between the first fixed frame member 20 and the second fixed frame member 22.

  Further, the fixed frame 14 includes a fixed yoke 42 attached to the eyepiece side surface of the first fixed frame member 20 and a circuit board 26 attached to the objective side surface of the second fixed frame member 22. . At the center of the first fixed frame member 20, the second fixed frame member 22, the fixed yoke 42, and the circuit board 26, a circular opening having substantially the same radius is formed around the optical axis of the image blur correction lens 12. Yes. The first fixed frame member 20 is formed with a rectangular opening (not shown) that forms a pair at every 120 ° angle around the optical axis of the image blur correction lens 12. The magnets 32a, 32b, and 32c are held in a state of being fitted in these rectangular openings. The fixed yoke 42 is disposed on the eyepiece side of the drive magnets 32a, 32b, 32c.

  As shown in FIGS. 3, 5, and 6, the moving frame 16 has a substantially annular shape and is disposed so as to be surrounded by the edge of the fixed frame 14. An image blur correction lens 12 is attached to the central opening of the moving frame 16. Further, the moving frame 16 is formed with three accommodating portions 16a each having a cylindrical recess having a diameter larger than that of the support ball 18 and a depth smaller than the diameter of the support ball, and opening to the fixed frame 14 side. Yes. The accommodating portion 16a is disposed so as to be positioned in the vicinity of each of the driving coils 28a, 28b, 28c with an interval of a central angle of 120 °.

  Further, the diameter of the first fixed frame member 20 on the object side surface facing the accommodating portion 16a formed on the moving frame 16 is larger than the support ball 18 and the depth is larger than the diameter of the support ball. Three accommodating portions 20c made of small cylindrical recesses are also formed. Since the moving frame 16 is attracted by the driving magnets 32 a, 32 b, and 32 c of the fixed frame 14, each support ball 18 is located between the accommodating portion 20 c of the first fixed frame member 20 and the accommodating portion 16 a of the moving frame 16. Is held between and held. With such a configuration, the moving frame 16 is supported on a plane parallel to the fixed frame 14, and further, the rolling motion of the moving frame 16 with respect to the fixed frame 14 and the rotation of the moving frame 16 with respect to the fixed frame 14 by rotating while holding the support balls 18. Movement is allowed. In the present embodiment, the support ball 18 is used as the movable portion support means. However, it is sufficient that the moving frame 16 can be moved in parallel with the fixed frame 14, and a support means such as a roller can also be used. is there.

The three drive coils 28 a, 28 b, and 28 c are arranged so that their centers are located on the circumference centered on the optical axis of the lens unit 2. In the present embodiment, the driving coil 28a is disposed vertically below the optical axis, and the driving coils 28b and 28c have a central angle of 120 ° on the circumference centered on the optical axis with respect to the driving coil 28a. They are arranged at intervals. That is, the drive coils 28a, 28b, and 28c are arranged rotationally symmetrically about the optical axis. Further, the driving coils 28a, 28b, 28c are arranged so that their windings are wound in a rectangular shape with rounded corners, and the center line of this rectangle coincides with the radial direction of the circumference.
Note that the object to be rotated means that the position or shape after being rotated by a predetermined angle around the central axis coincides with the position or shape before the rotation.

  The drive magnets 32a, 32b, and 32c each have a rectangular shape, and are fixed in a state of being fitted into a rectangular opening formed in the first fixed frame member 20 constituting the fixed frame 14. The drive magnets 32 a, 32 b, and 32 c are positioned at positions corresponding to the drive coils 28 a, 28 b, and 28 c on the circumference of the moving frame 16. In the present specification, the position corresponding to the driving coil means a position where the influence of the magnetic field formed by the driving coil is substantially reached.

  The circuit board 26 constituting the fixed frame 14 is provided with three connectors 24a, 24b, 24c as connection portions for connecting the flexible boards 30a, 30b, 30c. The connector 24a is connected to the corresponding drive coil 28a and hall element 34a via the flexible substrate 30a. Similarly, the connectors 24b and 24c are connected to the corresponding driving coils 28b and 28c and the hall elements 34b and 34c via the flexible boards 30b and 30c.

  Further, a controller side connector 36 for connecting to the controller 40 is provided on the circuit board 26, and the connectors 24a, 24b, 24c and the controller side connector 36 are connected via the circuit board 26 so as to be able to transmit and receive. ing. As shown in FIG. 1, the controller-side connector 36 is connected to the controller 40 via a controller-side flexible board 38.

  Thereby, the signal input from the controller 40 to the controller-side connector 36 via the controller-side flexible board 38 is sent to each connector 24a, 24b, 24c, and further, via each flexible board 30a, 30b, 30c, It is sent to the driving coils 28a, 28b, 28c. The signals output from the hall elements 34a, 34b, and 34c are sent to the connectors 24a, 24b, and 24c via the flexible boards 30a, 30b, and 30c, and collectively from the controller-side connector 36. It is transmitted to the controller 40 via the substrate 38.

  FIG. 8 shows a flexible substrate 30a used in the present embodiment, where (a) is a perspective view, (b) is a plan view, (c) is a side view, and (d) is a front view. In FIG. 8, portions 30a7, 30b7, and 30c7 (shown in FIGS. 2 and 3 on the object side of the circuit board 26) are omitted from illustration.

  As shown in the figure, the flexible substrate 30a is bent perpendicularly to the coil side connection portion 30a1 connected to the drive coil 28a and the Hall element 34a, and to the coil side connection portion 30a1, and circumferentially around the optical axis. A circumferential portion 30a2 extending in the vertical direction, an axial portion 30a3 extending in a direction perpendicular to the circumferential portion 30a2 (that is, parallel to the optical axis), and downward from the circumferential portion 30a2 (first fixed frame member) 20) (in the vertical direction), curved toward the radially outer side of the arc shape formed by the circumferential portion 30a2, and continuously curved from the circumferential portion 30a2 to the curved portion 30a4 following the axial portion 30a3. A protruding portion 30a5 extending in the extending direction of the direction portion 30a2 and a portion that is bent perpendicularly to the axial direction portion 30a3, extends along the circuit board 26, and is connected to the connector 24a. Including a connector-side connecting portion.

  In addition, an opening 30a6 is formed in the bending portion 30a4, and a part of the wiring in the flexible substrate 30a passes through the portion on the circumferential direction portion 30a2 side with respect to the opening 30a6 of the bending portion 30a4, and the rest of the wiring is curved. The portion 30a4 passes through the portion on the protruding portion 30a5 side with respect to the opening 30a6. In addition, it is not wired in the protrusion part 30a5.

  As shown in FIG. 7, in the flexible substrate 30a, the coil side connection portion 30a1 is attached to the object side surface where the drive coil 28a of the moving frame 16 is attached, and the flexible side substrate 30a is driven by the coil side connection portion 30a1. A coil 28a and a hall element 34a are attached. Further, a suction yoke 44a is attached to the objective side of the coil side connection portion 30a1.

  Further, the outer peripheral surface of the protruding portion 30 a 5 that is continuous with the circumferential portion 30 a 2 is in contact with the column portion 20 a of the first fixed frame member 20. Thereby, the circumferential direction part 30a2 is extended between the coil side connection part 30a1 and the protrusion part 30a5 in the state curved in the circumferential direction around the center of the opening of the moving frame 16. FIG. Further, the curved portion 30 a 4 is curved so as to protrude toward the first fixed frame member 20, and the outer surface thereof is in contact with the base portion 20 b of the first fixed frame member 20. The axial direction portion 30a3 continuously extends from the curved portion 30a4 to the objective side along the optical axis, passes through the notches formed in the second fixed frame member 22 and the circuit board 26, and is on the objective side of the circuit board 26. It extends to. Then, as shown in FIG. 2, the connector side connection portion 30a7 continuing to the axial direction portion 30a3 is bent with respect to the axial direction portion 30a3 so as to extend in parallel with the circuit board 26, and the tip is connected to the corresponding connector 24a. Has been.

  Although the configuration of the flexible board 30a has been described here, the other flexible boards 30b and 30c have the same configuration except for the shape of the connector side connection portion depending on the position of the corresponding connector 24. It has a structure and is arranged similarly.

  In the present embodiment, the protruding portion 30a5 is provided on the flexible substrate 30a as described above, and the outer peripheral surface of the protruding portion 30a5 is brought into contact with the column portion 20a of the first fixed frame member 20. With this configuration, in the circumferential portion 30a2 of the flexible substrate 30a, the coil side connection portion 30a1 continuous to one side is connected to the driving coil 28a, and the protruding portion 30a5 continuous to the other side is a column of the first fixed frame member 20. It will be supported by the part 20a. Thereby, the part to the location which contact | abuts to the pillar part 20a of the circumferential direction part 30a2 and the protrusion part 30a5 can be hold | maintained in desired curved shape, and when the moving frame 16 moves with this curved shape, the moving frame 16 It is possible to reduce the repulsive force of the flexible substrate 30a that acts on the substrate.

  Next, the magnetic force exerted by the drive magnet will be described with reference to FIG. A fixed yoke 42 is located on the eyepiece side of the drive magnet 32a, and an attracting yoke 44a is located on the objective side of the drive coil 28a. Further, the drive magnets 32a, 32b, and 32c are oriented such that the magnetization boundary line C, which is the boundary line of the magnetic poles, coincides with the radial direction of the circumference where each drive magnet is disposed. As a result, the drive magnet 32a, the fixed yoke 42, and the attracting yoke 44a constitute a magnetic circuit and form magnetic lines of force indicated by arrows in FIG. 9A (shown for the drive magnet 32a in FIG. 9A). . Thus, when a current flows through the driving coil 28a, the driving coil 28a receives a driving force in the tangential direction of the circumference where the driving magnets 32a are arranged.

  In this specification, the magnetization boundary line C refers to the boundary line of the magnetized magnetic poles when both ends of the drive magnet are magnetized so as to be S pole and N pole, respectively. Shall. Therefore, in this embodiment, the magnetization boundary line C is located so as to pass through the midpoint of the long side of the rectangular driving magnet. Further, as shown in FIG. 9B, the polarity of the driving magnet 32a also changes in the thickness direction. In FIG. 9B, the lower left corner is the S pole, the lower right corner is the N pole, The upper left is the N pole and the upper right is the S pole.

  Next, the driving force received by each driving magnet will be described with reference to FIGS. FIG. 10A is a graph showing the relationship between the relative position of the driving coil and the driving magnet and the driving force received by the driving magnet, and FIGS. 10B to 10E show b in the graph. The relative positions of the driving coil and the driving magnet at points e to e are shown.

  First, as shown in FIG. 9A, the left half portion, which is the first magnet portion 32a1, of the drive magnet 32a is connected to the left end portion, which is the first winding portion 28a1, of the drive coil 28a. ) Exerts magnetic field lines from the bottom to the top. Similarly, the right half part, which is the second magnet part 32a2 of the driving magnet 32a, has a magnetic field line extending from the top to the bottom in FIG. 9A on the right end part, which is the second winding part 28a2, of the driving coil 28a. Effect.

  On the other hand, when a current in the direction indicated by an arrow in FIG. 10B flows through the drive coil 28a, a current flows from the front side of FIG. 9A toward the back in the first winding portion 28a1 of the drive coil 28a. Current flows through the second winding portion 28a2 from the back of FIG. 9A toward the front side. When such a current flows in the magnetic field formed by the driving magnet 32a, a driving force for moving the driving coil 28a in the right direction in FIG. 8A is generated.

  As shown in FIG. 10A, this driving force is obtained when the driving magnet 32a and the driving coil 28a are in the positional relationship shown in FIG. 10B, that is, the magnetization boundary line C of the driving magnet 32a. Is maximized when positioned at the center of the drive coil 28a. Further, the driving force decreases as the driving coil 28a shifts to the right or left from the maximum position. Further, when the driving coil 28a is moved rightward to the position shown in FIG. 9C (point c in FIG. 10A), the driving force becomes zero. When the driving coil 28a is further moved to reach the position shown in FIG. 10D (point d in FIG. 10A), the direction of the driving force is reversed, and the driving coil 28a is driven in the left direction. To receive. Thus, in the state where the driving force is reversed, the driving coil 28a receives only the driving force generated between the second magnet portion 32a2 and the first winding portion 28a1 of the driving coil 28a. Therefore, the maximum value of the driving force in the region where the driving force is reversed is smaller than the driving force in the state of FIG.

  On the other hand, when the driving coil 28a is moved leftward, the driving force decreases and becomes zero at the position shown in FIG. 10E (point e in FIG. 10A). In addition, when the driving coil 28a is further moved leftward, the direction of the driving force is reversed, and the driving coil 28a receives the leftward driving force.

  The driving force described above is for the case where the clockwise current in FIG. 10B flows through the driving coil 28a, and when the counterclockwise current flows through the driving coil 28a, the driving force is as follows. All the directions are reversed. That is, when a counterclockwise current flows through the driving coil 28a, a leftward driving force is generated in the region from point e to point c in FIG. In the region on the right side of the point c, a right driving force is generated. In the above description, the driving force generated between the driving coil 28a and the driving magnet 32a has been described. However, the driving force generated between the other two sets of driving coils and the driving magnet is exactly the same. is there.

  In the actuator 10 of the camera 1 according to the present embodiment, the first winding portion of the driving coil and the first magnet portion of the driving magnet, and the second winding portion and the second magnet portion face each other, so that the driving is sufficient. Image blur prevention control is executed in a normal operation region where a force is generated.

Next, position detection of the moving frame 16 will be described with reference to FIGS.
11 and 12 are diagrams for explaining the relationship between the movement of the driving magnet 32a and the signal output from the Hall element 34a. As shown in FIG. 11, when the sensitivity center point S of the Hall element 34a is located on the magnetization boundary line C of the driving magnet 32a, the output signal from the Hall element 34a is zero. When the Hall element 34a is moved together with the moving frame 16, and the sensitivity center point of the Hall element 34a deviates from the magnetization boundary line of the driving magnet 32a, the output signal of the Hall element 34a changes.

  As shown in FIG. 11, when the Hall element 34a moves in the direction perpendicular to the magnetization boundary line C with respect to the driving magnet 32a, that is, in the X-axis direction, the Hall element 34a generates a sine wave signal. Therefore, when the amount of movement is small, the hall element 34a outputs a signal that is substantially proportional to the distance of movement of the hall element 34a relative to the driving magnet 32a. In this embodiment, when the moving distance of the hall element 34a is within about 3% of the length of the long side of the driving magnet 32a, the signal output from the hall element 34a is the sensitivity center point of the hall element 34a. It is approximately proportional to the distance between S and the magnetization boundary line C of the drive magnet 32a. In the present embodiment, the actuator 10 operates within a range in which the output of each Hall element is substantially proportional to the distance in the normal operation region.

  As shown in FIGS. 12A to 12C, when the magnetization boundary line C of the driving magnet 32a is positioned on the sensitivity center point S of the Hall element 34a, the Hall is formed as shown in FIG. When the element 34a rotates relative to the driving magnet 32a, both the case where the Hall element 34a moves in the direction of the magnetization boundary line C of the driving magnet 32a as shown in FIG. The output signal is zero. Also, as shown in FIGS. 12D to 12F, when the magnetization boundary line C of the driving magnet 32a deviates from the sensitivity center point S of the Hall element 34a, the sensitivity center point S and the magnetization boundary are separated. A signal proportional to the distance r of the line C is output from the Hall element 34a. Accordingly, if the distance r from the sensitivity center point S to the magnetization boundary line C is the same, when the Hall element 34a moves in a direction perpendicular to the magnetization boundary line C as shown in FIG. When the Hall element 34a is translated and rotated as shown in (e) and when it is translated in an arbitrary direction as shown in FIG. 12 (f), a signal having the same magnitude is output from the Hall element 34a. .

  Although the Hall element 34a has been described here, the other Hall elements 34b and 34c also output similar signals based on the positional relationship with the corresponding driving magnets 32b and 32c. For this reason, based on the signals detected by the hall elements 34a, 34b, and 34c, the position where the moving frame 16 is translated and rotated with respect to the fixed frame 14 can be specified.

  Next, image blur prevention control by the actuator 10 will be described with reference to FIG. FIG. 13 is a block diagram showing signal processing in the controller 40. As shown in FIG. 13, the vibration of the lens unit 2 is detected momentarily by the two gyros 15a and 15b, and is input to arithmetic circuits 52a and 38b which are lens position command signal generating means built in the controller 40. In the present embodiment, the gyro 15a is configured and arranged to detect the angular velocity of the yawing motion of the lens unit 2, and the gyro 15b is configured to detect the angular velocity of the pitching motion.

  The arithmetic circuits 52a and 38b generate lens position command signals for instructing in time series the position to which the image blur correction lens 12 should be moved based on the angular velocities input from the gyros 15a and 15b every moment. That is, the arithmetic circuit 52a time-integrates the angular velocity of the yawing motion detected by the gyro 15a and corrects predetermined optical characteristics to generate the horizontal component Dx of the lens position command signal. Similarly, the arithmetic circuit 52b Is configured to generate the vertical component Dy of the lens position command signal based on the angular velocity of the pitching motion detected by the gyro 15b. In accordance with the lens position command signal thus obtained, the image blur correction lens 12 is moved from moment to moment, so that even when the lens unit 2 vibrates during exposure for photography, the image sensor in the camera body 4 is used. The image focused on F is stabilized without being disturbed.

  The coil position command signal generating means built in the controller 40 is configured to generate a coil position command signal for each driving coil based on the lens position command signals generated by the arithmetic circuits 52a and 38b. The coil position command signal is obtained when each of the driving coils 28a, 28b, 28c and the corresponding driving magnets 32a, 32b, 32c when the image blur correcting lens 12 is moved to the position specified by the lens position command signal. It is a signal showing the positional relationship. That is, when each driving coil is moved to the position commanded by the coil position command signal, the image blur correction lens 12 is moved to the position commanded by the lens position command signal. In the present embodiment, since the driving coil 28a is provided vertically above the optical axis, the coil position command signal ra for the driving coil 28a is a horizontal component of the lens position command signal output from the arithmetic circuit 52a. It becomes equal to Dx. Accordingly, the arithmetic circuit 46a, which is a coil position command signal generating means for generating a coil position command signal for the driving coil 28a, outputs the output from the arithmetic circuit 52a as it is. On the other hand, the coil position command signals rb and rc for the drive coils 28b and 28c are calculated by arithmetic circuits 46b and 46c, which are coil position command signal generation means, based on the horizontal component Dx and the vertical component Dy of the lens position command signal. Generated.

  On the other hand, the movement amount of the driving magnet with respect to each driving coil measured by the Hall elements 34a, 34b, 34c is amplified to a predetermined magnification by the magnetic sensor amplifiers 48a, 48b, 48c. The drive circuits 50a, 50b, and 50c differ in the difference between the coil position command signals ra, rb, and rc output from the arithmetic circuits 46a, 46b, and 46c and the signals output from the magnetic sensor amplifiers 48a, 48b, and 48c. A proportional current is passed through each drive coil 28a, 28b, 28c. Therefore, when there is no difference between the coil position command signal and the output from each magnetic sensor amplifier, that is, when each driving magnet reaches the position commanded by the coil position command signal, no current flows through each driving coil. The driving force acting on the driving magnet becomes zero.

  Next, the relationship between the lens position command signal and the coil position command signal when the moving frame 16 is translated will be described with reference to FIG. FIG. 14 is a diagram showing the positional relationship between the driving magnets 32 a, 32 b, 32 c arranged on the fixed frame 14 and the driving coils 28 a, 28 b, 28 c arranged on the moving frame 16. First, the three drive magnets 32a, 32b, and 32c are arranged on the circumference of a circle centered on the point Q so that the respective magnetization boundary lines C are directed in the radial direction. Further, when the moving frame 16 is at the operation center position, the driving coils 28a, 28b, 28c and the hall elements 34a, 34b, 34c have their center points (sensitivity center points in the hall elements) Sa, Sb, Sc is located at the intersection of each drive magnet 32a, 32b, 32c, the circumference of radius R with point Q as the origin, and each magnetization boundary line C. The moving frame 16 is translated around the operation center position, and image blur prevention control is executed.

  Next, the horizontal axis with the point Q as the origin is the X axis, the vertical axis is the Y axis, and the center point Q1 of the image stabilizing lens 12 is Dy, X in the Y axis direction as shown by the solid line in FIG. Consider a case in which -Dx translation is performed in the axial direction. When the moving frame 16 is moved in this way, the center points Sa, Sb, Sc of the driving coils 28a, 28b, 28c move to Sa ′, Sb ′, Sc ′. The distance between the magnetization boundary C of the driving magnet 32a and the point Sa 'is ra, the distance between the magnetization boundary C of the driving magnet 32b and the point Sb' is rb, and the driving magnet 32c is attached. Let rc be the distance between the magnetic boundary line C and the point Sc ′. The distances ra, rb, and rc correspond to the movement distances detected by the hall elements 34a, 34b, and 34c when the image stabilizing lens 12 is moved in the Y-axis direction by Dy and in the X-axis direction. . These distances ra, rb, and rc are uniquely determined with respect to the movement distances Dx and Dy in the X-axis direction and the Y-axis direction. Therefore, in order to move the image stabilization lens 12 in the X-axis direction and the Y-axis direction by Dx and Dy, respectively, the distances ra, rb, and rc corresponding thereto may be given as coil position command signals.

図１３を参照して説明した各演算回路４６ａ、４６ｂ、４６ｃは、夫々上記数式１に対応する演算を実行して、各コイル位置指令信号を生成している。 Here, if the positive direction of each distance ra, rb, rc is defined as shown by arrows a, b, c in FIG. 14, the relationship between ra, rb, rc and Dx, Dy is as follows (Formula 1) Given in.

Each of the arithmetic circuits 46a, 46b, 46c described with reference to FIG. 13 performs an operation corresponding to the above mathematical formula 1 to generate each coil position command signal.

によって与えられる。このように、各駆動用磁石が各駆動用コイルに対して同一距離接線方向に移動されることにより、移動枠１６は、像振れ補正用レンズ１２の光軸と撮像用レンズ８の光軸が一致した状態を保持しながら、光軸を中心に回転される。 Next, a coil position command signal when the moving frame 16 is rotated will be described. In order to rotate the moving frame 16, the same value may be given as each coil position command signal. That is, each coil position command signal for rotating the moving frame 16 clockwise by an angle θ [rad] is:

Given by. In this way, each drive magnet is moved in the same distance tangential direction with respect to each drive coil, so that the moving frame 16 has an optical axis of the image blur correction lens 12 and an optical axis of the imaging lens 8. It is rotated around the optical axis while maintaining the coincidence state.

  Next, the operation of the camera 1 according to the embodiment of the present invention will be described with reference to FIGS. First, an actuator 10 provided in the lens unit 2 is operated by turning on a start switch (not shown) for the camera shake prevention function of the camera 1. The gyros 15 a and 15 b attached to the lens unit 2 detect vibrations in a predetermined frequency band every moment and output them to the arithmetic circuits 52 a and 38 b built in the controller 40. The gyro 15a outputs an angular velocity signal in the yawing direction of the lens unit 2 to the arithmetic circuit 52a, and the gyro 15b outputs an angular velocity signal in the pitching direction to the arithmetic circuit 52b. The arithmetic circuit 52a time-integrates the input angular velocity signal to calculate the yawing angle, adds a predetermined optical characteristic correction to the yawing angle, and generates a horizontal lens position command signal Dx. Similarly, the arithmetic circuit 52b time-integrates the input angular velocity signal to calculate a pitching angle, adds a predetermined optical characteristic correction thereto, and generates a vertical lens position command signal Dy. An image focused on the image sensor F of the camera body 4 by moving the image blur correction lens 12 momentarily to a position commanded by a lens position command signal output in time series by the arithmetic circuits 52a and 38b. Is stabilized.

  The horizontal lens position command signal Dx output by the arithmetic circuit 52a is output as a coil position command signal ra for the driving coil 28a via the arithmetic circuit 46a. The arithmetic circuit 46b receives the lens position command signal Dx in the horizontal direction and the lens position command signal Dy in the vertical direction, and generates a coil position command signal rb for the drive coil 28b based on the middle expression of Equation 1. Is done. Similarly, the lens position command signals Dx and Dy are input to the arithmetic circuit 46c, and a coil position command signal rc for the driving coil 28c is generated based on the lower equation of Equation 1.

  On the other hand, the Hall element 34a corresponding to the driving coil 28a outputs a detection signal to the magnetic sensor amplifier 48a. The detection signal amplified by the magnetic sensor amplifier 48a is subtracted from the coil position command signal ra for the drive coil 28a, and a current proportional to these differences is output to the drive coil 28a via the drive circuit 50a. Similarly, a current proportional to the difference between the detection signal of the hall element 34b and the coil position command signal rb is output to the driving coil 28b via the drive circuit 50b, and the difference between the detection signal of the hall element 34c and the coil position command signal rc. Is output to the drive coil 28c via the drive circuit 50c.

When a current flows through each driving coil, a magnetic field proportional to the current is generated. Due to this magnetic field, each driving magnet disposed corresponding to each driving coil receives a driving force in a direction approaching the position specified by the coil position command signals ra, rb, rc, and the moving frame 16 is moved. The When the driving magnet reaches the position specified by the coil position command signal by this driving force, the coil position command signal and the detection signal of the Hall element coincide with each other, so the output of the driving circuit becomes zero and the driving force also becomes zero. In addition, when each driving magnet deviates from the position specified by the coil position command signal due to a disturbance or a change in the coil position command signal, a current flows again to each driving coil. The position is returned to the position specified by the position command signal.
By repeating the above operation every moment, the image blur correction lens 12 attached to the moving frame 16 having each driving magnet is moved so as to follow the lens position command signal. Thereby, the image focused on the image sensor F of the camera body 4 is stabilized.

  As described above, according to the actuator of the present embodiment, the protrusion 30a5 is provided on the flexible substrate 30a, and the outer peripheral surface of the protrusion 30a5 is brought into contact with the column portion 20a of the first fixed frame member 20. Therefore, in the circumferential direction portion 30a2 of the flexible substrate 30a, the coil side connection portion 30a1 continuous to one side is connected to the driving coil 28a, and the protruding portion 30a5 continuous to the other side is a column of the first fixed frame member 20. Supported by the portion 20a. Thereby, since a part of circumferential direction part 30a2 and protrusion part 30a5 can be hold | maintained in desired curved shape, since this curved-shaped part absorbs the relative displacement of the moving frame 16 and the fixed frame 14, The repulsive force of the flexible substrate 30a acting on the moving frame 16 when the moving frame 16 moves can be reduced. For this reason, unlike the conventional case, a portion for reducing the repulsive force of the flexible substrate 30a is not manually created, and the repulsive force of the flexible substrate is reduced without being affected by the work accuracy of the worker. can do.

  In order to hold the circumferential portion 30a2 in an arc shape, the outer peripheral surface of the curved portion 30a4 is bonded to the fixed frame as a method of supporting the portion on the opposite side of the coil side connecting portion 30a1 of the circumferential portion 30a2 with the fixed frame. A method is also conceivable. However, in such a method, the length of the circumferential portion 30a2 cannot be sufficiently taken, and the repulsive force of the flexible substrate 30a cannot be sufficiently reduced.

  On the other hand, in this embodiment, the protrusion part 30a5 is provided so that it may extend in the extension direction of the circumferential direction part 30a2. As a result, a part of the circumferential direction portion 30a2 and the protruding portion 30a5 are integrated and curved in an arc shape, so that compared to the case where the bending portion 30a4 is bonded to the fixed frame without providing such a protruding portion 30a5. The longer section of the flexible substrate 30a can be held in an arc shape. For this reason, the repulsive force of the flexible substrate 30a can be reduced more efficiently.

  Furthermore, according to this embodiment, since the outer peripheral surface is brought into contact with the first fixed frame member 22 without bonding the protruding portion 30a5, the circumferential direction of the circumferential portion 30a2 and the protruding portion 30a5 is circumferential. Can move in the direction. Thereby, compared with the case where the bending part 30a4 is adhere | attached on a fixed frame, the repulsive force of the flexible substrate 30a can fully be reduced more efficiently.

  Further, in the present embodiment, the circumferential portion 30a2 and the axial portion 30a3 are connected by a curved portion 30a4 that curves so as to protrude toward the first fixed frame member 20, and this curved portion 30a4. Since the outer peripheral surface of this is in contact with the first fixed frame member 20, the flexible substrate 30a can be prevented from being displaced in the axial direction.

  In addition, although this embodiment demonstrated the case where a circuit board was provided in the 2nd fixed frame member, it is not restricted to this but can also be provided in a 1st fixed frame member. In such a case, the axial part of the flexible substrate extends toward the first fixed frame member. In such a case, the second fixed frame member can be omitted.

  In the present embodiment, the circumferential portion 30a2 and the axial portion 30a3 are connected via the curved portion 30a4. However, the circumferential portion 30a2 and the axial portion 30a3 are continuously formed. Also good.

  Moreover, in this embodiment, although the protrusion part 30a5 shall protrude from the edge part on the opposite side of the coil side connection part 30a1 of the circumferential direction part 30a2, it is not restricted to this, A protrusion part is not the axial direction part 30a3. You may provide so that it may extend in the extension direction of the circumferential direction part 30a2 from the edge of the circumferential direction.

  Moreover, in this embodiment, although the outer peripheral surface of the protrusion part 30a5 is made to contact | abut to the pillar part 20a of the 1st fixed frame member 20, the location which contacts the outer peripheral surface of the protrusion part 30a5 is not restricted to this. Any part of the first fixed frame member 20 may be used.

  The shape of the flexible substrate in the actuator of the present invention is not limited to the above embodiment. Hereinafter, a second embodiment in which the shape of the flexible substrate is different will be described. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 15 is an exploded perspective view showing the actuator of the second embodiment, and FIG. 16 is an objective side front view showing the actuator of the second embodiment with the second fixed frame member removed. FIG. 17 is an enlarged perspective view of the vicinity of the flexible substrate in the actuator of the second embodiment.

  As shown in FIGS. 15 to 17, the actuator of the second embodiment includes the first fixed frame member 20, the second fixed frame member 22, the moving frame 16 and the like in the configuration of the actuator of the first embodiment. Only the shape of the flexible substrate is different from that of the first embodiment.

  Also in this embodiment, the flexible substrate 80a connects between the connector 24a and the corresponding driving coil 28a and the hall element 34a. Similarly, the flexible boards 80b and 80c connect the connectors 24b and 24c to the corresponding driving coils 28b and 28c and the hall elements 34b and 34c, respectively.

  18A and 18B show a flexible substrate used in the second embodiment, where FIG. 18A is a perspective view, FIG. 18B is a plan view, FIG. 18C is a side view, and FIG. In FIG. 18, portions 80a7, 80b7, and 80c7 on the object side of the circuit board 26 (shown in FIGS. 2 and 3; hereinafter, this portion is referred to as a connector side connection portion) are omitted.

  As shown in the figure, the flexible substrate 80a is bent perpendicularly to the coil side connection portion 80a1 connected to the drive coil 28a and the hall element 34a and the coil side connection portion 80a1, and is circumferentially arranged around the optical axis. A circumferential direction portion 80a2, extending in a direction perpendicular to the circumferential direction portion 80a2 (that is, parallel to the optical axis), and an end portion of the circumferential direction portion 80a2 opposite to the coil side connection portion 80a1. And a bent portion 80a5 connecting the circumferential edges of the axial portion 80a3, and extending downward (toward the first fixed frame member 20) from the circumferential portion 80a2 in the vertical direction, and the circumferential portion 80a2. The circuit board 26 is bent toward the outer side in the radial direction of the arc shape formed by the bent portion 80a4 following the axial direction portion 80a3 and bent perpendicularly to the axial direction portion 80a3. Extending along, including a connector-side connecting portion to be connected to the connector 24a, the. The bent part 80a5 has an acute angle with respect to the first extension part 80a7 extending continuously from the end part on the opposite side of the coil side connection part 80a1 of the circumferential part 80a2 and the first extension part 80a7. And a second extension portion 80a6 that extends from the end of the first extension portion 80a7 to the circumferential edge of the axial direction portion 80a3.

  In the present embodiment, the bent portion 80a5 extends in the extending direction of the circumferential portion 80a2, and a part of the surface radially outside the optical axis is in contact with the base portion 20b of the first fixed frame member 20. It corresponds to the part.

  In the flexible substrate 80a of the present embodiment, the end of the circumferential direction portion 80a2 opposite to the coil side connection portion 80a1 and the axial direction portion 80a3 are connected by a branched bent portion 80a5 and a curved portion 80a4. . A part of the wiring in the flexible substrate 80a passes through the bent part 80a5, and the rest of the wiring passes through the curved part 80a4 and reaches the axial part 80a3. Note that the wiring in the flexible substrate 80a does not necessarily pass through both the bending portion 80a4 and the bending portion 80a5, and only one of them may be provided.

  As shown in FIG. 17, in the flexible substrate 80a, the coil side connection portion 80a1 is attached to the object side surface at the position where the drive coil 28a of the moving frame 16 is attached, and is driven by the coil side connection portion 30a1. A coil 28a and a hall element 34a are attached. A suction yoke 44a is attached to the objective side of the coil side connection portion 80a1.

  In addition, the outer peripheral surface of the second extension portion 80a6 constituting the bent portion 80a5 continuous to the circumferential direction portion 80a2 is in contact with the column portion 20a of the first fixed frame member 20. As a result, the circumferential portion 80a2 extends between the coil-side connection portion 80a1 and the protruding portion 80a5 around the center of the opening of the moving frame 16 while being curved in the circumferential direction. Further, the curved portion 80 a 4 is curved so as to protrude toward the first fixed frame member 20, and the outer surface thereof is in contact with the base portion 20 b of the first fixed frame member 20. The axial portion 80a3 continuously extends from the curved portion 30a4 to the objective side along the optical axis, passes through the cutouts formed in the second fixed frame member 22 and the circuit board 26, and is on the objective side of the circuit board 26. It extends to. Then, as shown in FIG. 15, the connector side connection portion 80a8 continuous to the axial direction portion 80a3 is bent with respect to the axial direction portion 80a3 so as to extend in parallel with the circuit board 26, and the tip is connected to the corresponding connector 24a. Has been.

  Although the configuration of the flexible board 80a has been described here, the other flexible boards 80b and 80c have the same configuration except for the shape of the connector side connection portion depending on the position of the corresponding connector 24. It has a structure and is arranged similarly.

  In the present embodiment, the flexible substrate 80a is provided with a bent portion 80a5, and the outer peripheral surface of the second extension portion 80a6 constituting the bent portion 80a5 is brought into contact with the column portion 20a of the first fixed frame member 20. . Thereby, the circumferential direction part 80a2 and the 1st extension part 80a7 of the flexible substrate 80a can be hold | maintained in a desired curved shape, and when the moving frame 16 moves with this curved shape, it is the flexible which acts on the moving frame 16. The repulsive force of the substrate 80a can be reduced. Thus, according to the present embodiment, the circumferential portion 80a2 and the first extension portion 80a7 are held in a curved shape, and the repulsive force of the flexible substrate 80a is reduced at the curved shape portion. Thus, the part which reduces the repulsive force of the flexible substrate 30a is no longer created manually by the worker, and the repulsive force of the flexible substrate can be reduced without being affected by the work accuracy of the worker.

  Furthermore, in this embodiment, by providing the bent portion 80a5, the circumferential portion 80a2 and the first extension portion 80a7 of the flexible substrate 80a are integrally maintained in an arc shape. For this reason, the length of the part hold | maintained at circular arc shape in the flexible substrate 80a can be ensured long, and the repulsive force of the flexible substrate 30a can be reduced more efficiently.

  Further, in the present embodiment, the circumferential portion 80a2 and the axial portion 80a3 are connected by the bent portion 80a5 and further connected by the curved portion 80a4. For this reason, part or all of the wiring can be passed through the bending portion 80a4, and the bending portion 80a5 can be reduced in width, or the bending portion 80a5 can be reduced to reduce the rigidity of the bending portion 80a7. . Accordingly, the repulsive force in the circumferential direction with respect to the optical axis of the flexible substrate 30a can be more efficiently reduced.

  In the flexible substrate 80a of the present embodiment, the end portion of the circumferential portion 80a2 opposite to the coil side connection portion 80a1 and the axial portion 80a3 are connected by the bent portion 80a5 and the bending portion 80a4. However, the present invention is not limited to this, and is included in the present invention as long as it is connected at least by the bent portion 80a5.

DESCRIPTION OF SYMBOLS 1 Camera 2 Lens unit 4 Camera main body 6 Lens barrel 8 Imaging lens 10 Actuator 12 Correction lens 14 Fixed frame 16 Moving frame 18 Support ball 20 First fixed frame member 20a Column 20b Base 22 Second fixed frame member 24a, 24b, 24c Connector 26 Circuit boards 28a, 28b, 28c Driving coils 30a, 30b, 30c Flexible boards 32a, 32b, 32c Driving magnets 34a, 34b, 34c Hall element 36 Controller side connector 40 Controller 42 Fixed yoke 44a, 44b, 44c Suction yoke

Claims (7)

An actuator for preventing image blur by translating or rotating an image blur correction lens, which is a part of an imaging lens, in a plane perpendicular to the optical axis,
A fixed part;
A movable part to which the correction lens is attached;
A movable part supporting means for supporting the movable part so as to be movable on a plane parallel to the fixed part;
Three driving coils attached around the correction lens of the movable part, and three driving magnets attached to the fixed part so as to correspond to each of the three driving coils, Drive means for translating or rotating the movable part relative to the fixed part;
Control means for transmitting a position command signal corresponding to the amount of movement of the movable part to the three driving coils;
One or more connectors provided on the fixed portion corresponding to the three driving coils and capable of communicating with the control means;
One or more flexible boards that connect the drive coils and the corresponding connectors so that they can communicate with each other, and
The flexible substrate is bent with respect to the coil-side connecting portion connected to the driving coil, a circumferential portion extending in the circumferential direction of the correction lens continuously to the coil-side connecting portion , and the circumferential portion. And an axial portion extending substantially parallel to the optical axis of the correction lens, and a connector side connecting portion having a distal end connected to the connector continuously to the axial portion,
Furthermore, the flexible substrate is formed in the circumferential direction from an end portion of the circumferential direction portion opposite to the coil side connection portion, or from at least one of the circumferential edge portions of the correction lens in the axial direction portion. Having a protrusion extending in the direction of extension of the part,
The projection is characterized in that a part of the radially outer surface of the correction lens is in contact with a part of the fixed part.   The projecting portion is configured by forming a part of the flexible substrate so as to continuously extend from the end of the circumferential portion on the side opposite to the coil side connecting portion to the circumferential portion. The actuator according to claim 1. The projecting portion is constituted by a folded portion that is continuous from the circumferential portion, extends toward the opposite side of the coil side connecting portion, and is folded and connected to a circumferential edge of the axial portion. The actuator according to claim 1, wherein the circumferential portion and the axial portion are connected by the folded portion.   The said flexible substrate is further curved so that it may become convex from the circumferential direction part to an axial direction, and is provided with the curved part which connects between the said axial direction part and the said circumferential direction part. Actuator. The fixed portion includes a first fixed frame member disposed on the eyepiece side, and a second fixed frame member disposed on the object side of the first fixed frame member and supported by the first fixed frame member. The movable portion is disposed between the first fixed frame member and the second fixed frame member,
The connector is provided on a circuit board attached to the second fixed frame member, and the connector is communicably connected to the control means via the circuit board,
The circumferential portion extends along the periphery of the movable portion , the axial portion extends toward the second fixed frame member ,
The curved portion is curved so as to be convex toward the first fixed frame member, and a part thereof is in contact with the first fixed frame member.
The actuator according to claim 4. A lens barrel;
A plurality of imaging lenses housed in the lens barrel;
The actuator according to any one of claims 1 to 5, wherein a part of the imaging lens is attached to the movable part,
A lens unit comprising: The camera body,
A lens unit according to claim 6;
A camera comprising:

Images