JP2016090778A - Deflection correction device and optical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflection correction device capable of achieving miniaturization.SOLUTION: A deflection correction device 100 includes: a first rotation drive mechanism comprising a coil 107 including straight line parts 107a and 107b and a magnet 106 including areas 106a to 106d; and a second rotation drive mechanism comprising a coil 108 including straight line parts 108a and 108b and a magnet 105 including areas 105a to 105d, and currents I1 are allowed to run to the straight line part 107a, and a magnetic field B1 is generated in a direction orthogonal to the currents I1 in the areas 106b and 106c, and currents I2 in a direction opposite to the currents I1 are allowed to run to the straight line part 107b, and a magnetic field B2 in a direction opposite to a magnetic field B1 is generated in a direction orthogonal to the currents I2 in the areas 106d and 106a, and currents I3 are allowed to run to the straight line part 108a, and a magnetic field B3 is generated in a direction orthogonal to the currents I3 in the areas 105b and 105c, and currents I4 in a direction opposite to the currents I3 are allowed to run to the straight line part 108b, and a magnetic field B4 in a direction opposite to the magnetic field B3 is generated in a direction orthogonal to the currents I4 in the areas 105d and 105a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shake correction apparatus and an optical apparatus.

  2. Description of the Related Art In recent years, a lens barrel support mechanism including a shake correction device that corrects shake of an image formed on an imaging surface via an optical system such as a lens or an imaging device is known (see, for example, Patent Document 1). . The shake correction apparatus in Patent Document 1 includes two shafts that rotate an optical system, a bearing portion that supports each of the shafts, and a substrate having the bearing portion. The substrate includes a coil, and the optical system is rotated around each of the two axes by a magnetic force generated by a magnetic field generated by passing a current through the coil and a magnetic field generated by a magnet attached to the optical system. Correct.

JP 7-318866 A

  However, in the shake correction apparatus of Patent Document 1, the magnet attached to the optical system has a ring shape, and the S pole and the N pole are alternately magnetized in the circumferential direction. The coil needs to be provided on the substrate, which increases the size of the substrate. As a result, there is a problem that the shake correction apparatus cannot be reduced in size.

  An object of the present invention is to provide a shake correction apparatus and an optical apparatus that can be downsized.

  In order to achieve the above object, the shake correction apparatus of the present invention generates a rotational driving force around the first rotation axis in the shake correction apparatus that rotates about the first rotation axis and the second rotation axis. And a second rotation drive mechanism that generates a rotation drive force around the second rotation axis, wherein the first rotation drive mechanism includes the first coil and the first rotation drive mechanism. The second rotational drive mechanism has a second magnet and a second magnet arranged to face the second coil, and has a first magnet arranged to face the coil. The first coil and the second coil have a first region and a second region, respectively, and the first magnet and the second magnet have a third region and a fourth region, respectively. And the first region and the third region When the first coil and the second coil are energized, the first current flowing in the first region is opposite to the second region and the fourth region. The direction of the second current flowing in the second region is opposite to the direction of the second region, the third region has a first magnetic field orthogonal to the first current, and the fourth region is A second magnetic field perpendicular to the second current is provided, and the direction of the first magnetic field is opposite to the direction of the second magnetic field.

  According to the present invention, it is possible to reduce the size of the shake correction apparatus.

FIG. 1A is an exploded perspective view of a shake correction apparatus according to an embodiment of the present invention, in which FIG. 1A shows the shake correction apparatus viewed from the subject side, and FIG. 1B shows the shake correction apparatus on the imaging surface side. This shows the case when viewed from above. 2A and 2B are diagrams showing the shake correction device of FIG. 1 assembled, FIG. 2A is a plan view, FIG. 2B is a cross-sectional view taken along the line AA in FIG. FIG.2 (c) is sectional drawing which follows the BB line in Fig.2 (a). It is an enlarged view of the magnet and coil in FIG. It is a figure for demonstrating operation | movement of the shake correction apparatus when the correction lens in FIG. 1 rotates centering on the 1st rotating shaft. It is a figure for demonstrating operation | movement of the shake correction apparatus when the correction lens in FIG. 1 rotates centering around a 2nd rotating shaft. It is a figure for demonstrating the modification of the magnet in FIG. It is a figure used in order to demonstrate the 1st modification of the shake correction apparatus of FIG. It is a figure used in order to demonstrate the 2nd modification of the shake correction apparatus of FIG. It is a figure used in order to demonstrate the 3rd modification of the shake correction apparatus of FIG. FIG. 10 is a diagram used for explaining the arrangement of the coils in the assembled shake correction apparatus of FIG. 1, and FIG. 10A shows the optical axis and the second rotation axis of the shake correction apparatus around the coil. FIG. 10B and FIG. 10C are cross-sectional views showing a first modification and a second modification of the coil arrangement in FIG. 10A, respectively. FIG. 11A is a view used for explaining the arrangement of coils in the shake correction apparatus of FIG. 1 assembled, FIG. 11A is a plan view of the shake correction apparatus, and FIG. 11B and FIG. These are the top views which show the 3rd modification and 4th modification of arrangement | positioning of the coil in Fig.11 (a).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an exploded perspective view of a shake correction apparatus 100 according to an embodiment of the present invention. FIG. 1A shows the shake correction apparatus 100 viewed from the subject side, and FIG. The case where the correction apparatus 100 is viewed from the imaging surface side is shown. 2 is a diagram showing the shake correction apparatus 100 of FIG. 1 assembled, FIG. 2 (a) is a plan view, and FIG. 2 (b) is taken along line AA in FIG. 2 (a). It is sectional drawing which follows, and FIG.2 (c) is sectional drawing which follows the BB line in Fig.2 (a).

  1 and 2, a shake correction apparatus 100 includes a correction lens 101, a lens frame (correction lens holding member) 102, an intermediate frame (intermediate member) 103, and a fixing member 104. For example, a lens barrel included in a camera. (Not shown).

  The correction lens 101 moves along the optical axis O1 of the lens barrel. Further, when the detector (not shown) detects a user's camera shake that occurs during imaging, the correction lens 101 moves the image formed on the imaging surface of the camera according to the degree of camera shake, and occurs during imaging. The camera shake correction is performed to reduce the influence of the user shake. Further, the correction lens 101 has its own optical axis O2, and the optical axis O2 overlaps with the optical axis O1 when the correction lens 101 is not performing camera shake correction.

  The lens frame 102 stores the correction lens 101 in the center of the lens frame 102. The lens frame 102 has a housing shape and includes side surfaces 102a to 102d. A shaft portion 102e protrudes from the side surface 102a perpendicular to the optical axis O2, and a shaft portion 102f projects from the side surface 102c perpendicular to the optical axis O2. The central axis of the shaft part 102e and the central axis of the shaft part 102f coincide.

  Further, the side surface 102 a includes a magnet holding portion 102 g, and the magnet holding portion 102 g holds the magnet 105. The side surface 102b includes a magnet holding portion 102h, and the magnet holding portion 102h holds the magnet 106. The magnet holding part 102g and the magnet holding part 102h protrude from the side surfaces 102a and 102b so as to be perpendicular to the optical axis O2 and perpendicular to each other.

  The intermediate frame 103 has a housing shape, includes side surfaces 103 a to 103 d, and is disposed outside the lens frame 102. From the side surface 103a, an axial protrusion 103e protrudes perpendicular to the optical axis O2, and from the side surface 103c, an axial protrusion 103f protrudes perpendicular to the optical axis O2. A hole 103g is formed in the protruding portion 103e along the central axis, and the hole 103g opens inside the side surface 103a. A hole 103h is formed in the protruding portion 103f along the central axis, and the hole 103h opens inside the side surface 103a. Further, the shaft portion 103i protrudes perpendicularly to the optical axis O2 from the side surface 103b, and the shaft portion 103j protrudes perpendicularly to the optical axis O2 from the side surface 103d. The central axis of the shaft part 103i and the central axis of the shaft part 103j coincide.

  The fixing member 104 has a casing shape, includes side surfaces 104 a to 104 d, and is disposed outside the intermediate frame 103. An opening 104e opens on the side surface 104a, and an opening 104f opens on the side surface 104c. Further, an axial protrusion 104g protrudes perpendicularly to the optical axis O2 from the side surface 104b, and an axial protrusion 104h protrudes perpendicularly to the optical axis O2 from the side surface 104d. A hole 104j is formed along the central axis in the projecting portion 104h, and the hole 104j opens inside the side surface 104d. A hole 104i is formed in the protruding portion 104g along the central axis, and the hole 104i opens inside the side surface 104b. The side surface 104b includes a convex coil holding portion 104k, and the coil 107 is fitted into the coil holding portion 104k. The side surface 104a includes a convex coil holding portion 104l, and the coil 108 is fitted into the coil holding portion 104l.

  In the shake correction apparatus 100, when the fixing member 104, the intermediate frame 103, and the lens frame 102 are assembled, the fixing member 104 includes the intermediate frame 103, and the intermediate frame 103 includes the lens frame 102. At this time, each of the side surfaces 104a to 104d of the fixing member 104 opposes each of the side surfaces 103a to 103d of the intermediate frame 103, and each of the side surfaces 103a to 103d of the intermediate frame 103 corresponds to each of the side surfaces 102a to 102d of the lens frame 102. opposite.

  The shaft portion 102e is inserted into the hole portion 103g, the protrusion portion 103e supports the shaft portion 102e, the shaft portion 102f is inserted into the hole portion 103h, and the protrusion portion 103f supports the shaft portion 102f. As a result, the lens frame 102 rotates with respect to the intermediate frame 103 in the direction of the arrow T1 in FIG. 2B around the shaft portions 102e and 102f (hereinafter referred to as “first rotation shaft 201”). The shaft portion 103i is inserted into the hole portion 104i, the protruding portion 104g supports the shaft portion 103i, the shaft portion 103j is inserted into the hole portion 104j, and the protruding portion 104h supports the shaft portion 103j. Thereby, the intermediate frame 103 rotates in the direction of arrow T2 in FIG. 2C around the shaft portions 103i and 103j (hereinafter referred to as “second rotation shaft 202”) with respect to the fixed member 104.

  The lens frame 102 rotates about the first rotation shaft 201 only with respect to the intermediate frame 103, and the intermediate frame 103 rotates about the second rotation shaft 202 only with respect to the fixing member 104. The first rotating shaft 201 and the second rotating shaft 202 are orthogonal to each other as shown in FIG.

  The lens frame 102, the intermediate frame 103, and the fixing member 104 are formed of a non-magnetic material, for example, a material such as resin or non-magnetic stainless steel in order to eliminate the influence on the coils 107 and 108 and the magnets 105 and 106. It is preferable.

  The magnets 105 and 106 are, for example, rectangular parallelepiped magnets, and the magnet 105 is disposed along the optical axis O2 so as to face the side surface 102a, and the inner surface (a surface facing the side surface 102a) along the optical axis O2. Regions 105a and 105b are formed from the imaging surface side, and regions 105d and 105c are formed on the outer surface along the optical axis O2 from the imaging surface side. The regions 105a and 105b are separated by a boundary 105e located at the approximate center of the length along the optical axis O2 of the magnet 105, and the regions 105d and 105c are also separated by the boundary 105e. In the magnet 105, the regions 105a and 105c are magnetized to the S pole, and the regions 105b and 105d are magnetized to the N pole. Therefore, in the magnet 105, a magnetic field is generated in the thickness direction of the magnet 105 from the region 105b to the region 105c, and a magnetic field is generated in the thickness direction of the magnet 105 from the region 105d to the region 105a.

  The magnet 106 is disposed along the optical axis O2 so as to face the side surface 102b. On the inner surface (the surface facing the side surface 102b), regions 106a and 106b are formed along the optical axis O2 from the imaging surface side, and are formed on the outer surface. The regions 106d and 106c are formed from the imaging surface side along the optical axis O2. The regions 106a and 106b are separated by a boundary 106e located at the approximate center of the length along the optical axis O2 of the magnet 106, and the regions 106d and 106c are also separated by the boundary 106e. In the magnet 106, the regions 106a and 106c are magnetized to the S pole, and the regions 106b and 106d are magnetized to the N pole. Therefore, in the magnet 106, a magnetic field is generated in the thickness direction of the magnet 106 from the region 106b to the region 106c, and a magnetic field is generated in the thickness direction of the magnet 106 from the region 106d to the region 106a.

  The coils 107 and 108 are wound coils in which a conducting wire is wound. The winding direction of the coil 107 is the direction of arrow C1 in FIG. 1A, and the winding direction of the coil 108 is in FIG. 1A. The arrow C2 direction. The coil 107 has an elliptical shape having straight portions 107a and 107b, semicircular portions 107c and 107d, and a hollow portion 107e, and the coil 108 has straight portions 108a and 108b, semicircular portions 108c and 108d, and a hollow portion 108e. It has an elliptical shape. The coil 107 is fitted to the coil holding portion 104k so that the straight portions 107a and 107b are perpendicular to the optical axis O2, and the coil 108 is fitted to the coil holding portion 104l so that the straight portions 108a and 108b are perpendicular to the optical axis O2. Is done.

  The hollow portion 107e is provided with a shaft portion 103i constituting the second rotating shaft 202, and a hole portion 104i and a protruding portion 104g (second support means) that support the shaft portion 103i. The hollow portion 108e is provided with a shaft portion 102e constituting the first rotating shaft 201, and a hole portion 103g and a protruding portion 103e (first support means) that support the shaft portion 102e.

  When the fixing member 104, the intermediate frame 103, and the lens frame 102 are assembled, the side surface 102a faces the side surface 104a across the side surface 103a, and the side surface 102b faces the side surface 104b across the side surface 103b, and thus protrudes from the side surface 102a. The magnet 105 held by the magnet holding portion 102g facing the coil 108 fitted to the coil holding portion 104l protruding from the side surface 104a, and the magnet 106 held by the magnet holding portion 102h protruding from the side surface 102b is the side surface 104b. It opposes the coil 107 fitted to the coil holding part 104k protruding from. At this time, the substantially central portion of the coil holding portion 104l faces the boundary 105e of the magnet 105. As a result, the regions 105a and 105d of the magnet 105 face the straight portion 108b of the coil 108, and the regions 105b and 105c look like the straight portion 108a. Opposite to. Further, the substantially central portion of the coil holding portion 104k faces the boundary 106e of the magnet 106. As a result, the regions 106a and 106d of the magnet 106 face the straight portion 107b of the coil 107, and the regions 106b and 106c face the straight portion 107a. opposite.

  In the present embodiment, the coil 107 and the magnet 106 constitute a first rotation drive mechanism. In the first rotation drive mechanism, the intersection point P between the first rotation shaft 201 and the second rotation shaft 202, the coil 107. And a straight line L1 connecting the center of gravity of the magnet 106 and the center of gravity of the magnet 106 are arranged so as to overlap the second rotating shaft 202. In addition, the coil 108 and the magnet 105 constitute a second rotation drive mechanism. In the second rotation drive mechanism, the intersection point P between the first rotation axis and the second rotation axis, the center of gravity of the coil 108, and the magnet 105. A straight line L2 connecting the centroids is arranged so as to overlap the first rotating shaft 201. In the first rotation drive mechanism, the straight line L1 does not necessarily overlap the second rotation shaft 202, and the straight line L1 is not rotated as long as the lens frame 102 is rotatable with respect to the intermediate frame 103. It may be arranged so as to intersect the axis 202. Further, in the second rotational drive mechanism, the straight line L2 does not necessarily overlap the first rotation shaft 201, and the straight line L2 does not necessarily rotate in the first rotation as long as the intermediate frame 103 can rotate with respect to the fixed member 104. You may arrange | position so that it may cross | intersect with respect to the axis | shaft 201. FIG. That is, since it is less necessary to strictly adjust the position of the straight line L1 and the second rotation shaft 202 and the position of the straight line L2 and the first rotation shaft 201, the first rotation drive mechanism and the second rotation The degree of freedom in attaching the drive mechanism to the shake correction apparatus 100 can be increased.

  In the shake correction apparatus 100, as shown in FIG. 2A, the coil 107 is larger than the magnet 106 and is disposed closer to the center of the shake correction apparatus 100 than the magnet 106. The coil 108 is larger than the magnet 105 and is disposed closer to the center of the shake correction apparatus 100 than the magnet 105.

  Further, in the shake correction apparatus 100, as shown in FIG. 3, the first rotation driving mechanism and the second rotation driving mechanism have space regions 301 and 302 (shown by meshes in the drawing), and the space region 301 , 302 does not have mass bodies such as the shaft portion 103i, the protruding portion 104g, the shaft portion 102e, and the protruding portion 103e (FIG. 3).

  FIG. 4 is a diagram for explaining the operation of the shake correction apparatus 100 when the correction lens 101 in FIG. 1 rotates around the first rotation shaft 201. 4A is a plan view of the shake correction apparatus 100, and FIG. 4B is a cross-sectional view taken along line CC in FIG. 4A.

  In the first rotational drive mechanism, the coil 107 is energized by a drive circuit (not shown), and the magnet 106 generates a Lorentz force F1 caused by the current in the coil 107 and the magnetic field in the magnet 106.

  Specifically, in the first rotation drive mechanism, a magnetic field B1 generated in the thickness direction of the magnet 106 in the regions 106b and 106c of the magnet 106 facing the straight portion 107a of the coil 107, and a current I1 flowing through the straight portion 107a. Since they are orthogonal, a Lorentz force Fs acting in the direction of the optical axis O2 is generated due to the current I1 and the magnetic field B1. In addition, since the magnetic field B2 generated in the thickness direction of the magnet 106 in the areas 106d and 106a of the magnet 106 facing the straight portion 107b of the coil 107 and the current I2 flowing through the straight portion 107b are orthogonal, the current I2 and the magnetic field B2 are As a result, a Lorentz force Ft acting in the direction of the optical axis O2 is generated.

  In the shake correction apparatus 100, the direction of the Lorentz force Fs and the direction of the Lorentz force Ft can be switched to either the imaging surface side or the subject side by controlling the directions of the currents I1 and I2 flowing through the coil 107. . Here, since the direction of the current I1 and the direction of the current I2 are opposite and the direction of the magnetic field B1 and the direction of the magnetic field B2 are opposite, the direction of the Lorentz force Fs becomes the same as the direction of the Lorentz force Ft, Lorentz force Fs and Lorentz force Ft do not cancel each other. As a result, the Lorentz force F1, which is the sum of the Lorentz force Fs and the Lorentz force Ft, is generated in the magnet 106.

  The Lorentz force F1 generates a moment M1 around the first rotation axis 201, and the lens frame 102 rotates about the first rotation axis 201 with respect to the intermediate frame 103 by the moment M1.

  FIG. 5 is a diagram for explaining the operation of the shake correction apparatus 100 when the correction lens 101 in FIG. 1 rotates around the second rotation shaft 202. 5A is a plan view of the shake correction apparatus 100, and FIG. 5B is a cross-sectional view taken along the line DD in FIG. 5A.

  In the second rotational drive mechanism, the coil 108 is energized by a drive circuit (not shown), and the magnet 105 generates a Lorentz force F2 caused by the current in the coil 108 and the magnetic field in the magnet 105.

  Specifically, in the second rotational drive mechanism, a magnetic field B3 generated in the thickness direction of the magnet 105 in the regions 105b and 105c of the magnet 105 facing the straight portion 108a of the coil 108, and a current I3 flowing through the straight portion 108a. Since they are orthogonal, a Lorentz force Fx acting in the direction of the optical axis O2 is generated due to the current I3 and the magnetic field B3. In addition, since the magnetic field B4 generated in the magnet thickness direction in the regions 105a and 105d of the magnet 105 facing the straight part 108b of the coil 108 and the current I4 flowing through the straight part 108b are orthogonal to each other, this is caused by the current I4 and the magnetic field B4. Thus, a Lorentz force Fy acting in the direction of the optical axis O2 is generated.

  In the shake correction apparatus 100, the direction of the Lorentz force Fx and the direction of the Lorentz force Fy can be switched to either the imaging surface side or the subject side by controlling the directions of the currents I3 and I4 flowing through the coil 108. . Here, since the direction of the current I3 and the direction of the current I4 are opposite and the direction of the magnetic field B3 and the direction of the magnetic field B4 are opposite, the direction of the Lorentz force Fx is the same as the direction of the Lorentz force Fy, The Lorentz force Fx and the Lorentz force Fy do not cancel each other. As a result, the Lorentz force F2 that is the sum of the Lorentz force Fx and the Lorentz force Fy is generated in the magnet 105.

  The Lorentz force F2 generates a moment M2 around the second rotation shaft 202, and the lens frame 102 and the intermediate frame 103 rotate around the second rotation shaft 202 with respect to the fixed member 104 by the moment M2.

  According to the shake correction apparatus 100 of FIGS. 1 to 5, the first rotation drive mechanism is such that the regions 106 b and 106 c of the magnet 106 facing the linear portion 107 a of the coil 107 are magnetic fields orthogonal to the current I 1 flowing through the linear portion 107 a. Since B1 is included, a Lorentz force Fs is generated in the direction of the optical axis O2 due to the current I1 and the magnetic field B1. On the other hand, in the first rotation drive mechanism, the regions 106a and 106d of the magnet 106 facing the straight line portion 107b of the coil 107 have a magnetic field B2 orthogonal to the current I2 flowing through the straight line portion 107b, and thus are caused by the current I2 and the magnetic field B2. Thus, a Lorentz force Ft is generated in the direction of the optical axis O2. Here, since the direction of the current I1 and the direction of the current I2 are opposite and the direction of the magnetic field B1 is opposite to the direction of the magnetic field B2, the direction of the Lorentz force Fs is the same as the direction of the Lorentz force Ft. The force Fs and the Lorentz force Ft do not cancel each other, and constitute a rotational driving force around the first rotation shaft 201. As a result, the first rotation drive mechanism can generate a rotation drive force around the first rotation shaft 201 without requiring a plurality of coils.

  Also in the second rotational drive mechanism, the direction of the Lorentz force Fx is the same as the direction of the Lorentz force Fy, and the Lorentz force Fx and the Lorentz force Fy do not cancel each other and rotate around the second rotation shaft 202. The rotational driving force is configured. As a result, a rotational driving force around the second rotation shaft 202 can be generated without requiring a plurality of coils. That is, since neither the first rotation drive mechanism nor the second rotation drive mechanism requires a plurality of coils, the shake correction apparatus 100 can be downsized.

  In the shake correction apparatus 100, the coil 107 larger than the magnet 106 is arranged closer to the center of the shake correction apparatus 100 than the magnet 106, and the coil 108 larger than the magnet 105 is closer to the center of the shake correction apparatus 100 than the magnet 105. Therefore, a large component is not arranged on the outer edge of the shake correction apparatus 100, and the outer shape of the shake correction apparatus 100 is suppressed from being enlarged, and thus the shake correction apparatus 100 can be further downsized. Can be realized.

  Furthermore, the first rotation drive mechanism and the second rotation drive mechanism have space regions 301 and 302. The smaller the space regions 301 and 302, the closer the magnet 106 is to the coil 107 and the closer the magnet 105 is to the coil 108. The Lorentz forces F1 and F2 increase, and as a result, the driving forces of the first rotation driving mechanism and the second rotation driving mechanism increase. Therefore, the space regions 301 and 302 are preferably smaller. In order to maximize the driving force of the first rotation driving mechanism and the second rotation driving mechanism, it is considered that the space regions 301 and 302 need not be provided. In this case, however, the coil 107, the magnet 106, and the coil 108 and the magnet 105 interfere with each other, and the shake correction apparatus 100 cannot rotate around the first rotation shaft 201 and the second rotation shaft 202. Therefore, the size of the space regions 301 and 302 is such that the shake correction apparatus 100 is not affected by the first rotating shaft 201 and the second rotating shaft 202 without the coils 107 and magnets 106 and the coils 108 and magnets 105 interfering with each other. It is necessary to ensure that it can be rotated around.

  The lens frame 102, the intermediate frame 103, and the fixing member 104 are preferably formed from a material such as resin or nonmagnetic stainless steel. Thereby, it is possible to prevent the Lorentz force F1 and the Lorentz force F2 from being lowered without inhibiting the magnetic fields B1 to B4 generated by the magnets 105 and 106. As a result, it is possible to prevent a decrease in the rotational driving force generated by the first rotational driving mechanism and the second rotational driving mechanism.

  The magnets 105 and 106 may be constituted by a plurality of magnets 601 divided by boundaries 105e and 106e, respectively (FIG. 6). This can avoid the use of magnets 105 and 106 that have different magnetization directions and are expensive. Further, for example, when the number of windings of the conductive wire wound around the coils 107 and 108 is decreased, the thickness of the coils 107 and 108 is decreased, and the shaft portion 103i, the hole portion 104i, In addition, the protruding portion 104g becomes longer, and the shaft portion 102e, the hole portion 103g, and the protruding portion 103e may become longer with respect to the coil 108 having a reduced thickness. At this time, since the magnets 105 and 106 are composed of a plurality of magnets 601 divided at the boundaries 105e and 106e, for example, the two divided magnets 601 are arranged apart from each other, and the two magnets 601 are separated from each other. By disposing a part of the shaft part 103i, the hole part 104i, and the projecting part 104g, or a part of the shaft part 102e, the hole part 103g, and the projecting part 103e between the parts 601, the two magnets 601 are replaced with the coil 107. , 108 can be approached. That is, the magnet 601 can be brought close to the coils 107 and 108 regardless of the length of the shaft portion 103i, the hole portion 104i, and the protruding portion 104g, the shaft portion 102e, the hole portion 103g, and the protruding portion 103e. The correction device 100 can be reduced in size.

  FIG. 10 is a diagram used for explaining the arrangement of the coil 107 in the assembled shake correction apparatus 100 of FIG. 1. FIG. 10A shows the optical axes O 1 and O 2 of the shake correction apparatus 100 around the coil 107. FIGS. 10B and 10C are cross-sectional views taken along the second rotating shaft 202, respectively, and FIG. 10B and FIG. 10C respectively show a first modification and a second modification of the arrangement of the coil 107 in FIG. FIG.

  In FIG. 10A, the shaft portion 103i, the hole portion 104i, and the protruding portion 104g are arranged so as to be accommodated in the hollow portion 107e. Here, the magnet 106 has an outer end 106f with respect to a direction perpendicular to the direction of the optical axis O2, and a subject side end 106g with respect to the direction of the optical axis O2. The distance between the optical axes O1 and O2 and the outer end 106f is R1, and the distance between the second rotation axis 202 and the subject side end 106g is H1.

  In FIG. 10B, the shaft portion 103i, the hole portion 104i, and the protruding portion 104g are not accommodated in the hollow portion 107e, and are disposed so as to face the hollow portion 107e. Here, the distance between the optical axes O1 and O2 and the outer end portion 106f is R2, and the distance between the second rotation shaft 202 and the subject side end portion 106g is H1. R2 is longer than R1.

  In FIG. 10C, the shaft portion 103i, the hole portion 104i, and the protruding portion 104g are not accommodated in the hollow portion 107e, and are offset from the hollow portion 107e toward the imaging surface in the optical axis O1 and O2 directions. . The distance between the optical axes O1 and O2 and the outer end 106f is R1, and the distance between the second rotation axis 202 and the subject side end 106g is H2. H2 is longer than H1.

  The shake correction apparatus 100 of FIG. 10A has a smaller area occupied by the coil 107 and the magnet 106 in the direction of the second rotation shaft 202 than the shake correction apparatus 100 of FIG. Further, the shake correction apparatus 100 in FIG. 10C has a small area occupied by the coil 107 and the magnet 106 in the optical axis O1 and O2 directions. Accordingly, the shake correction apparatus 100 in FIG. 10A can be downsized as compared with the shake correction apparatus 100 in FIG. 10B and the shake correction apparatus 100 in FIG.

  11 is a view used for explaining the arrangement of the coils 107 in the assembled shake correction apparatus 100 of FIG. 1. FIG. 11A is a plan view of the shake correction apparatus 100, and FIG. ) And FIG. 11C are plan views showing a third modification and a fourth modification of the arrangement of the coil 107 in FIG.

  In FIG. 11A, the shaft portion 103i, the hole portion 104i, and the protruding portion 104g are disposed so as to be accommodated in the hollow portion 107e. Here, an action point Pa in FIG. 11A is an action point of the Lorentz force F1, and is superimposed on the second rotation axis 202 when the shake correction apparatus 100 is viewed from the subject side in the optical axis O1 and O2 directions. To do.

In FIG. 11B, the shaft portion 103i, the hole portion 104i, and the protruding portion 104g are not accommodated in the hollow portion 107e, and are offset from the hollow portion 107e toward the shaft portion 102f in the direction of the first rotation shaft 201. Has been. At this time, the center of the coil 107, i.e., the distance 11 the point of application of the Lorentz force F1 in (b) in Pb ₀ and the second rotary shaft 202 is d1. Since the action point Pb ₀ and the second rotation shaft 202 are shifted, the Lorentz force F1 is divided, and the divided Lorentz force F11 acts on the action point Pb ₁ on the second rotation shaft 202. and the action point Pb ₂ on the first rotary shaft 201 Lorentz force F12 which is a component force acts.

  That is, the Lorentz force F1 is divided into Lorentz forces F11 and F12, a moment M2 is generated around the second rotation shaft 202 based on the Lorentz force F11, and the first rotation shaft 201 is driven based on the Lorentz force 12. A moment M1 is generated around. The lens frame 102 rotates around the first rotation shaft 201 and the second rotation shaft 202 by moments M1 and M2.

In FIG. 11C, the shaft portion 103i, the hole portion 104i, and the protruding portion 104g are disposed between the two coils 107x and 107y, and the distance between the coil 107x and the second rotating shaft 202, and the coil 107y and the first portion are arranged. The distance from the second rotation shaft 202 is d2. The winding direction of the conducting wire wound around the coil 107x is opposite to the winding direction of the conducting wire wound around the coil 107y, and the direction of current flowing through the coil 107x is opposite to the direction of current flowing through the coil 107y. As a result, the direction of the Lorentz force F1 _x0 generated based on the coil 107x and the magnet 106x is opposite to the direction of the Lorentz force F1 _y0 generated based on the coil 107y and the magnet 106y. Note that it is assumed that the Lorentz force F1 _x0 and the Lorentz force F1 _y0 have the same magnitude.

The action point Pc _x0 in FIG. 11C is the action point of the Lorentz force F1 _x0 , and the action point Pc _y0 is the action point of the Lorentz force F1 _y0 . Since the action point Pc _x0 is displaced from the first rotation shaft 201 and the second rotation shaft 202, the Lorentz force F1 _x0 is divided, and the action point Pc _x1 on the first rotation shaft 201 has a component force. The Lorentz force F1 _x1 is applied, and the divided Lorentz force F1 _x2 is applied to the action point Pc _x2 on the second rotation shaft 202. Further, since the action point Pc _y0 is shifted from the first rotation shaft 201 and the second rotation shaft 202, the Lorentz force F1 _y0 is divided, and the action point Pc _y1 on the first rotation shaft 201 is Lorentz force _{F1 y2} acts on the Lorentz force _{F1 y1} is the point on the second rotary shaft 202 and acts _{Pc y2.}

As described above, the Lorentz force F1 _x0 and the Lorentz force F1 _y0 have the same magnitude, and the distance from the action point Pc _y0 to the action point Pc _y2 and the distance from the action point Pc _x0 to the action point Pc _x2. Since both are the same d2, the magnitudes of the Lorentz force F1 _x2 and Lorentz force F1 _y2 are the same. On the other hand, the directions of the Lorentz force F1 _x2 and the Lorentz force F1 _y2 are opposite (in FIG. 11 (c), the direction of the Lorentz force F1 _y2 is not shown). M1 does not occur.

Furthermore, Lorentz force in a first one of the Lorentz force _{F1 x1} which is a component force from the Lorentz force _{F1 x0} acts on the point _{Pc x1} on the rotating shaft 201, the point on the first rotating shaft 201 _{Pc y1} Lorentz force F1 _{y1 divided} from F1 _y0 acts. Here, since the directions of the Lorentz force F1 _x1 and the Lorentz force F1 _y1 are opposite to each other, based on the Lorentz force F1 _x1 and the Lorentz force F1 _y1 , the first point existing between the action point Pc _x1 and the action point Pc _y1 . A moment M2 is generated around the second rotation axis 202, and the lens frame 102 is rotated about the second rotation axis 202 by the moment M2.

  In the shake correction apparatus 100 in FIG. 11A, the Lorentz force F <b> 1 is not divided compared to the shake correction apparatus 100 in FIG. 11B, so the lens frame 102 rotates around the first rotation shaft 201. A decrease in driving force can be avoided. Further, in the shake correction apparatus 100 of FIG. 11A, the number of coils used in one rotation drive mechanism is one. On the other hand, in the shake correction apparatus 100 of FIG. 11C, the number of coils used in one rotation drive mechanism is two. That is, the number of coils used in one rotational drive mechanism is smaller in the shake correction apparatus 100 in FIG. 11A than in the shake correction apparatus 100 in FIG. As a result, the number of coils required according to the number of coils, such as a coil holding portion for attaching the coil to the fixing member and wiring for supplying power to the coil, can be suppressed to a minimum, thereby increasing the size of the shake correction apparatus 100. Can be avoided.

  FIG. 7 is a diagram used for explaining a first modification of the shake correction apparatus 100 of FIG. 7A is a plan view of the shake correction device 110, FIG. 7B is a cross-sectional view taken along line EE in FIG. 7A, and FIG. 7C is FIG. 7A. It is sectional drawing which follows the FF line | wire in FIG.

  The shake correction device 110 in FIG. 7 includes the magnet holding portion 102g in which the side surface 103a of the intermediate frame 103 holds the magnet 105, and the side surface 102a in the lens frame 102 does not have the magnet holding portion 102g. Different from 100.

  When the correction lens 101 rotates about the first rotation axis 201, the correction lens 101, the lens frame 102, the magnet holding portion 102h, and the magnet 106 may be movable, and the lens frame 102 does not need to include the magnet 105. .

  According to the shake correction device 110 of FIG. 7, since the side surface 103a of the intermediate frame 103 includes the magnet holding portion 102g that holds the magnet 105, the shake correction device 110 is quickly operated by reducing the weight of the movable lens frame 102. Therefore, image blurring by the correction lens 101 can be corrected quickly.

  FIG. 8 is a diagram used for explaining a second modification of the shake correction apparatus 100 of FIG. 1. 8A is a plan view of the shake correction apparatus 120, FIG. 8B is a front view of FIG. 8A, and FIG. 8C is an exploded perspective view of the shake correction apparatus 120.

  The shake correction apparatus 120 of FIG. 8 includes the magnet holding part 102g that holds the magnet 105 on the side surface 103a of the intermediate frame 103, and the shake correction apparatus of FIG. 1 in that the side face 102a of the lens frame 102 does not include the magnet holding part 102g. Different from 100. Further, the shake correction apparatus 120 includes the coil holding portion 104k in which the side surface 103b of the intermediate frame 103 is fitted with the coil 107, and the side of the fixing member 104 is not provided with the coil holding portion 104k. Different from the device 100.

  8, the side surface 102b of the movable lens frame 102 includes the magnet holding unit 102h that holds the magnet 106, and the side surface 103b of the intermediate frame 103 has the coil holding unit 104k into which the coil 107 is fitted. Therefore, the first rotation drive mechanism only needs to move only the lens frame 102 relative to the intermediate frame 103, and the first rotation drive mechanism can quickly drive the lens frame 102. Therefore, it is possible to quickly correct the image shake caused by the correction lens 101.

  FIG. 9 is a diagram used for explaining a third modification of the shake correction apparatus 100 of FIG. 1. 9A is a plan view of the shake correction device 130, FIG. 9B is a cross-sectional view taken along line GG in FIG. 9A, and FIG. 9C is FIG. 9A. FIG. 9D is an exploded perspective view of the shake correction device 130. FIG.

  9 includes magnet holding portions 901a and 901b for holding the magnets 105 and 106 on the substrate 104m to which the side surfaces 104b to 104d are fixed, and the side surfaces 102a and 102b of the lens frame 102 are magnet-held. 1 is different from the shake correction apparatus 100 of FIG. 1 in that the units 102g and 102h are not provided. In addition, the shake correction device 130 includes a coil holding portion 104l to which the coil 108 is fitted, and a coil holding portion 104k to which the coil 107 is fitted, respectively, on the side surfaces 102a and 102b of the lens frame 102. 1 is different from the shake correction apparatus 100 of FIG. 1 in that the coil holding section 104k, 104l is not provided.

  When the magnet 105 is fixed to the magnet holding portion 901a, the center of gravity of the magnet 105 is located on the first rotation shaft 201, and when the magnet 106 is fixed to the magnet holding portion 901b, the center of gravity of the magnet 106 is the first center. Located on the rotating shaft 201.

  According to the shake correction device 130 of FIG. 9, the side surfaces 104a and 104b of the movable lens frame 102 include the coil holding portions 104l and 104k into which the coils 107 and 108 are fitted, respectively, and the side surfaces 104b to 104d are fixed. The substrate 104m includes magnet holding portions 901a and 901b for holding the magnets 105 and 106. Here, since the coils 107 and 108 are lighter than the magnets 105 and 106, the weight of the movable lens frame 102 can be reduced, and the shake correction device 130 can be operated quickly. It can be corrected quickly.

  Note that the shake correction apparatus 100 in the present embodiment can be applied to an optical apparatus. The optical device in this case is, for example, a camera, and the camera may be a so-called integrated camera in which a camera body having an image sensor (CCD, CMOS) and a lens are integrated, and is configured so that the lens can be attached to and detached from the camera body. It may be a so-called interchangeable lens camera.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments.

100 shake correction device 105, 106 magnet 105a-105d, 106a-106d area 107, 108 coil 107a, 107b, 108a, 108b linear portion 201 first rotating shaft 202 second rotating shaft I1, I2, I3, I4 current B1 , B2, B3, B4 magnetic field

Claims (11)

In the shake correction apparatus that rotates around the first rotation axis and the second rotation axis,
A first rotation drive mechanism for generating a rotation drive force around the first rotation axis;
A second rotation drive mechanism for generating a rotation drive force around the second rotation axis,
The first rotational drive mechanism includes a first coil and a first magnet disposed to face the first coil, and the second rotational drive mechanism includes a second coil and the second coil. A second magnet disposed so as to face the coil of the first coil, and the first coil and the second coil have a first region and a second region, respectively, and the first magnet and the second coil, respectively. Each of the second magnets has a third region and a fourth region, the first region and the third region are opposed to each other, and the second region and the fourth region are opposed to each other. When the first coil and the second coil are energized, the direction of the first current flowing through the first region is opposite to the direction of the second current flowing through the second region. The third region is orthogonal to the first current The first region has a second magnetic field orthogonal to the second current, and the direction of the first magnetic field is opposite to the direction of the second magnetic field. A characteristic shake correction device. A first support means for supporting the first rotation shaft;
The first coil has a first hollow portion between the first region and the second region, and the first support means is disposed in the first hollow portion. The shake correction apparatus according to claim 1. A second support means for supporting the second rotation shaft;
The second coil has a second hollow portion between the first region and the second region, and the second support means is disposed in the second hollow portion. The shake correction apparatus according to claim 1, wherein:   The space region is provided between the first coil and the first magnet, and another space region is provided between the second coil and the second magnet. The shake correction apparatus according to any one of the above. A correction lens holding member that holds and moves the correction lens, and a fixing member;
The correction lens holding member has the first coil and the second coil, and the fixing member holds the first magnet and the second magnet. The shake correction apparatus according to any one of the above.   6. The shake correction apparatus according to claim 5, wherein the correction lens holding member and the fixing member are made of resin or nonmagnetic stainless steel. A correction lens holding member that holds and moves the correction lens, a movable intermediate member, and a fixed member;
The correction lens holding member has one of the first magnet and the second magnet, and the intermediate member has the other of the first magnet and the second magnet;
The intermediate member has one of the first coil and the second coil, and the fixing member has the other of the first coil and the second coil. The shake correction apparatus according to any one of the above. The shake correction apparatus according to claim 7, wherein the correction lens holding member, the intermediate member, and the fixing member are made of resin or nonmagnetic stainless steel.   The first coil is larger than the first magnet, and in the first rotational drive mechanism, the first coil is disposed closer to the center of the shake correction device than the first magnet, and The second coil is larger than the second magnet, and in the second rotational drive mechanism, the second coil is disposed closer to the center of the shake correction device than the second magnet. The shake correction apparatus according to any one of claims 5 to 8.   The shake correction apparatus according to any one of claims 1 to 9, wherein the first magnet and the second magnet are divided according to the third region and the fourth region. .   An optical apparatus comprising the shake correction apparatus according to claim 1.