Shake correction device, lens barrel, and imaging apparatus

Abstract

To miniaturize a shake correcting device.SOLUTION: The shake correction device is connected to a drive unit that drives a lens holding frame that holds a lens in a direction intersecting an optical axis with respect to a fixed frame that movably holds the lens holding frame, a substantially plate-shaped first substrate that has a first surface and a second surface facing each other in an optical axis direction and is connected to the drive unit, a substantially plate-shaped second substrate that has a third surface and a fourth surface facing each other in the optical axis direction, is connected to the drive unit, and is separate from the first substrate, and a flexible substrate that is connected to the first substrate and the second substrate. A main substrate that holds a communication unit that performs communication with the camera body, a lock member that restricts movement of the lens holding frame with respect to the fixed frame, and a third drive unit that drives the lock member, in which a distal end portion of the flexible substrate is bifurcated, one distal end portion of the bifurcated distal end portion is connected to the first substrate, the other distal end portion is connected to the second substrate, and the third drive unit is disposed between the first substrate and the second substrate in a circumferential direction around the optical axis and is disposed between the one distal end portion and the other distal end portion.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a vibration reduction device, a lens barrel, and an imaging device. [Background technology]

[0002] BACKGROUND ART Imaging devices are known that include a shake correction device that suppresses blurring of captured images due to camera shake, etc. There is a demand for miniaturization of shake correction devices (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-124809 Summary of the Invention

[0004] According to a first aspect, a vibration reduction device includes a lens holding frame that holds a lens, a fixed frame that movably holds the lens holding frame, a drive unit that drives the lens holding frame relative to the fixed frame in a direction that intersects with the optical axis, and a substrate that has a first surface and a second surface that face each other in the optical axis direction and is connected to the drive unit, and a first plane that includes the first surface of the substrate intersects with the drive unit.

[0005] According to a second aspect, a lens barrel includes the above-described image stabilization device.

[0006] According to a third aspect, an imaging device includes the above-described image stabilization device.

[0007] The configurations of the embodiments described below may be modified as appropriate, and at least a portion of the configuration may be replaced with other components. Furthermore, components that are not particularly limited in terms of their placement may be placed in any position that can achieve their function, not limited to the placement disclosed in the embodiments. [Brief explanation of the drawings]

[0008] [Figure 1]FIG. 1 is a diagram showing a camera including a lens barrel equipped with a shake correction device according to an embodiment, and a camera body. [Figure 2] FIG. 2 is an exploded perspective view of the image stabilization device as seen from the camera body side. [Figure 3] FIG. 3 is an exploded perspective view of the image stabilization device as seen from the subject side. [Figure 4] FIG. 4 is a cross-sectional view of the image stabilization device. [Figure 5] 5(A) and 5(B) are diagrams of the image stabilization device as seen from the camera body side. [Figure 6] FIG. 6 is a perspective view of the image stabilization device as seen from the subject side. [Figure 7] FIG. 7 is a plan view of the image stabilization device as seen from the subject side. [Figure 8] 8(A) is a cross-sectional view taken along line AA in FIG. 7, and FIG. 8(B) is a cross-sectional view taken along line BB in FIG. [Figure 9] 9A is a plan view of a vibration reduction device according to a comparative example, as viewed from the subject side, and FIG. 9B is a cross-sectional view taken along line CC in FIG. 9A. [Figure 10] FIG. 10 is a diagram for explaining the reuse of the first substrate and the second substrate. [Figure 11] FIG. 11(A) is a plan view showing a substrate according to another embodiment, FIG. 11(B) is a cross-sectional view taken along line DD in FIG. 11(A), and FIG. 11(C) is a cross-sectional view taken along line EE in FIG. 11(A). DETAILED DESCRIPTION OF THE INVENTION

[0009] A shake correction device 80 according to one embodiment will be described in detail below with reference to the drawings. Note that an XYZ Cartesian coordinate system is provided in the drawings as appropriate to facilitate explanation and understanding. In this coordinate system, the +Z direction is the direction from the subject toward the camera body 101 when the photographer is shooting a landscape image with the optical axis OA horizontal (hereinafter referred to as the normal position). Also, the +X direction is the direction toward the right when viewed from the camera body 101 in the normal position. Also, the +Y direction is the direction toward the top in the normal position. Note that the scales of the shapes, lengths, thicknesses, etc. of the various parts shown in the embodiments do not necessarily correspond to the actual objects, and some elements may be omitted from the drawings to facilitate understanding.

[0010] 1 is a diagram showing a camera 1 that includes a lens barrel 100 that includes an image stabilization device 80 according to this embodiment, and a camera body 101. Note that in this embodiment, lens barrel 100 is detachable from camera body 101, but this is not limiting, and lens barrel 100 and camera body 101 may also be integrated.

[0011] The camera body 101 includes an image sensor IS and a control unit 112. The image sensor IS is configured with a photoelectric conversion element such as a CCD (Charge Coupled Device), and converts the subject image formed by the imaging optical system (lens barrel 100 attached to the camera body 101) into an electrical signal.

[0012] The control unit 112 is equipped with a CPU (Central Processing Unit) and the like, and controls the overall operation of the camera 1 related to photography, including focusing drive in the camera body 101 and the attached lens barrel 100, and blur correction of captured images due to camera shake, etc.

[0013] As shown in Fig. 1, the lens barrel 100 according to this embodiment includes a fixed barrel 10. In this embodiment, the fixed barrel 10 is made up of multiple parts, but it may also be made up of a single part. As shown in Fig. 1, a lens mount LM is fixed to the fixed barrel 10, which enables the lens barrel 100 to be attached to and detached from a camera body 101.

[0014] Lens barrel 100 also includes multiple lens groups L1 to L9 arranged in sequence along a common optical axis OA. Lens group L4 is held by lens holding frame F4, lens group L6 is held by lens holding frame F6, and lens group L8 is held by lens holding frame F8. The other lens groups are held by fixed barrel 10. Each of lens groups L1 to L9 may be made up of a single lens or multiple lenses.

[0015] The lens group L6 is a vibration reduction (VR) lens, and when performing vibration reduction, it can be moved by a vibration reduction device 80 in a plane perpendicular to the optical axis OA.

[0016] Fig. 2 is an exploded perspective view of image stabilization device 80 as seen from the camera body 101 side, and Fig. 3 is an exploded perspective view of image stabilization device 80 as seen from the subject side. As shown in Figs. 2 and 3, image stabilization device 80 includes movable frame 60, fixed frame 30, and lock ring 20.

[0017] The movable frame 60 holds the lens group L6 via the lens holding frame F6, and moves within the XY plane perpendicular to the optical axis OA (Z axis).

[0018] The fixed frame 30 includes a first fixed frame 40 and a second fixed frame 50. As shown in Fig. 2, the first fixed frame 40 is a substantially annular member having a circular hole 41 in the center, and unlike the movable frame 60, it does not move within a plane perpendicular to the optical axis OA, but holds the movable frame 60 so that it can move relatively within the plane perpendicular to the optical axis OA. More specifically, the first fixed frame 40 holds the movable frame 60 via three steel balls 43 and three coil springs 42.

[0019] The movable frame 60 and the first fixed frame 40 are biased toward each other by a coil spring 42, with a steel ball 43 sandwiched between them. The coil spring 42 connects the first fixed frame 40 and the movable frame 60 in the direction of the optical axis OA, and prevents the first fixed frame 40 and the movable frame 60 from separating in the direction of the optical axis OA.

[0020] The first fixed frame 40 and the movable frame 60 each have a contact surface that comes into contact with the steel ball 43 at the position where the steel ball 43 is disposed. When the movable frame 60 moves in a plane perpendicular to the optical axis OA, the steel ball 43 rotates between the contact surface of the first fixed frame 40 and the contact surface of the movable frame 60. This allows the movable frame 60 to move parallel to the first fixed frame 40 with low friction.

[0021] Here, the driving of the lens group L6 will be described. The lens group L6 held by the movable frame 60 is moved within the XY plane by VCMs (voice coil motors) 90X and 90Y to correct image blur. The VCMs 90X and 90Y are installed so as to push the center of gravity G of the lens group L6 parallel to the XY plane. The VCMs 90X and 90Y are arranged so that their positions in the optical axis OA direction are approximately the same. For example, the -Z side surface of the VCM 90X and the -Z side surface of the VCM 90Y are arranged so as to be located in the same plane perpendicular to the optical axis OA.

[0022] The VCM 90X is an actuator for driving the lens group L6 in the X-axis direction, and includes an X-axis drive coil 61X, a pair of X-axis drive magnets 52X, and a yoke 53X. The VCM 90Y is an actuator for driving the lens group L6 in the Y-axis direction, and includes a Y-axis drive coil 61Y, a pair of Y-axis drive magnets 52Y, and a yoke 53Y. The pair of X-axis drive magnets 52X and the pair of Y-axis drive magnets 52Y are in-plane dipole magnetized magnets having two poles, north and south.

[0023] In this embodiment, the X-axis direction drive coil 61X and the Y-axis direction drive coil 61Y are attached to the movable frame 60. Meanwhile, a yoke 53X is attached to the second fixed frame 50 at a position corresponding to the X-axis direction drive coil 61X, and an X-axis direction drive magnet 52X is attached to the yoke 53X. Furthermore, a yoke 53Y is attached to the movable frame 60 at a position corresponding to the Y-axis direction drive coil 61Y, and a Y-axis direction drive magnet 52Y is attached to the yoke 53Y.

[0024] FIG. 4 is a cross-sectional view of the image stabilization device 80. As shown in FIG. 4, by passing a current through the Y-axis direction drive coil 61Y, which is disposed between the Y-axis direction drive magnets 52Y, the Y-axis direction drive coil 61Y receives a Lorentz force and drives the movable frame 60 in the Y-axis direction. This causes the lens group L6 held by the movable frame 60 to move in the Y-axis direction. Alternatively, the yoke 53Y and the Y-axis direction drive magnet 52Y may be attached to the movable frame 60, and the Y-axis direction drive coil 61Y may be attached to the second fixed frame 50. In other words, the VCM 90Y may be a moving coil type VCM or a moving magnet type VCM. The same applies to the VCM 90X, so a detailed description thereof will be omitted.

[0025] 2 and 3, the second fixed frame 50 is a substantially annular member having a circular hole 51 in the center. Unlike the movable frame 60, the second fixed frame 50 does not move within a plane perpendicular to the optical axis OA. As described above, the yoke 53X and the yoke 53Y are attached to the second fixed frame 50.

[0026] The lock ring 20 is a substantially annular member having a circular hole 21 in the center, and is a member for locking the movable frame 60 so that it does not move relative to the fixed frame 30 when shake correction is not being performed.

[0027] 5(A) and 5(B) are views of the image stabilization device 80 as seen from the camera body 101. Note that Fig. 5(A) shows the case where the lock ring 20 is in an unlocked position that allows movement of the lens group L6 in a plane perpendicular to the optical axis OA, and Fig. 5(B) shows the case where the lock ring 20 is in a locked position that restricts movement of the lens group L6 in a plane perpendicular to the optical axis OA.

[0028] The lock ring 20 rotates around the optical axis OA by a motor 70 (see Figures 2 and 3) attached to the second fixed frame 50, and moves between a locked position that restricts the movement of the movable frame 60 and an unlocked position that releases the restriction.

[0029] More specifically, as shown in Figures 5(A) and 5(B), a gear portion 22 is formed on the outer periphery of the lock ring 20, which meshes with a pinion gear 71 attached to the rotary shaft of a motor 70. This transmits the rotational force of the motor 70 to the lock ring 20, and the lock ring 20 is driven to the locked position (Figure 5(B)) and the unlocked position (Figure 5(A)) by the forward and reverse rotation of the motor 70. The motor 70 may be a DC motor, a stepping motor, an ultrasonic motor, or the like.

[0030] Next, we will explain the first substrate 230a and the second substrate 230b attached to the first fixing frame 40. Fig. 6 is a perspective view of the image stabilization device 80 as seen from the subject side. Fig. 7 is a plan view of the image stabilization device 80 as seen from the subject side. Fig. 8(A) is a cross-sectional view taken along line AA in Fig. 7, and Fig. 8(B) is a cross-sectional view taken along line BB in Fig. 7.

[0031] 6, a first substrate 230a and a second substrate 230b are attached with screws to the surface of the first fixed frame 40 opposite the movable frame 60 (the surface on the -Z side). The first substrate 230a and the second substrate 230b are arranged between the inner periphery and the outer periphery of the first fixed frame 40. Furthermore, the first substrate 230a and the second substrate 230b are each arranged so as to surround a part of the inner periphery of the first fixed frame 40.

[0032] 7, the first substrate 230a is provided at a position facing the VCM 90Y across the optical axis OA in the XY plane, while the second substrate 230b is provided at a position facing the VCM 90X across the optical axis OA in the XY plane.

[0033] The motor 70 is provided between the first substrate 230a and the second substrate 230b attached to the first fixed frame 40 in the circumferential direction of a circle centered on the optical axis OA.

[0034] 8(A), the first substrate 230a has surfaces 231a and 232a that face each other in the optical axis OA direction, and in this embodiment, a plane PL1 including the surface 231a and a plane PL2 including the surface 232a intersect with the VCM 90X and VCM 90Y. In other words, the first substrate 230a overlaps with the VCMs 90X and 90Y in the radial direction. Furthermore, the first substrate 230a does not overlap with either the VCMs 90X or 90Y in the optical axis OA direction. In other words, the first substrate 230a and the VCMs 90X and 90Y are not stacked in the optical axis OA direction.

[0035] 8(B), the second substrate 230b has surfaces 231b and 232b that face each other in the optical axis OA direction, and in this embodiment, a plane PL3 including the surface 231b and a plane PL4 including the surface 232b intersect with the VCM 90X and VCM 90Y. In other words, the second substrate 230b overlaps with the VCM 90X and 90Y in the radial direction. Furthermore, the second substrate 230b does not overlap with either the VCM 90X or 90Y in the optical axis OA direction. In other words, the second substrate 230b and the VCM 90X and 90Y are not stacked in the optical axis OA direction.

[0036] In this way, because both the first substrate 230a and the second substrate 230b overlap with the VCM 90X and VCM 90Y in the radial direction, the thickness of the image stabilization device 80 in the optical axis OA direction can be reduced. In other words, the image stabilization device 80 can be made thinner. Furthermore, because neither the first substrate 230a nor the second substrate 230b overlaps with the VCM 90X and VCM 90Y in the optical axis OA direction, the thickness of the image stabilization device 80 in the optical axis OA direction can be reduced. In other words, the image stabilization device 80 can be made thinner.

[0037] This point will be explained using a comparative example. Fig. 9(A) is a plan view of a vibration reduction device 80' according to the comparative example, as seen from the subject side, and Fig. 9(B) is a cross-sectional view taken along line CC in Fig. 9(A).

[0038] As shown in FIG. 9(A), in the comparative example, the substrate 230 attached to the first fixing frame 40 is a single substrate that surrounds the inner periphery of the first fixing frame 40. For this reason, in the comparative example, as shown in FIG. 9(B), the substrate 230 cannot be positioned so that a plane PL5 including a surface 231 of the substrate 230 and a plane PL6 including a surface 232 of the substrate 230 intersect with the VCMs 90X and 90Y. In other words, the substrate 230 does not overlap with the VCMs 90X and 90Y in the radial direction. Furthermore, the substrate 230 overlaps with the VCMs 90Y and 90X in the optical axis OA direction. In other words, the substrate 230 and the VCMs 90Y and 90X are stacked in the optical axis OA direction.

[0039] For this reason, if the configuration other than the substrate 230 is the same as in the embodiment, the image stabilization device 80' will be thicker than the image stabilization device 80 according to the embodiment by at least the thickness in the optical axis OA direction of the substrate 230. In this way, the image stabilization device 80 according to the present embodiment can be made thinner than the configuration shown in the comparative example.

[0040] In this embodiment, the plane PL1 including the surface 231a of the first substrate 230a and the plane PL2 including the surface 232a intersect with the VCMs 90X and 90Y, respectively, but it is sufficient that at least the plane PL2 including the surface 232a intersects with the VCMs 90X and 90Y. That is, the plane PL1 including the surface 231a may be located on the -Z side of the -Z side surfaces of the VCMs 90X and VCM90Y in the direction of the optical axis OA. The same applies to the second substrate 230b.

[0041] 8(A), the light-receiving portion 242a, which is one of the light-emitting portion 241a and the light-receiving portion 242a included in the position detection element 240a, is provided on the surface 232a on the movable frame 60 side (+Z side) of the first substrate 230a. The light-receiving portion 242a is mounted on the surface 232a so that its length direction is parallel to the Y direction. Furthermore, a plane PL7 that includes the light-receiving portion 242a and is perpendicular to the optical axis OA intersects with the magnet 52X of the VCM 90X and the magnet 52Y of the VCM 90Y.

[0042] The light-emitting unit 241a is attached to the movable frame 60. The light-receiving unit 242a receives light emitted by the light-emitting unit 241a, and the position detecting element 240a detects the position of the lens group L6 moved by the VCM 90Y in the Y-axis direction in the XY plane. Therefore, the position detecting element 240a is provided at a position facing the VCM 90Y across the optical axis OA in the XY plane. Note that the light-emitting unit 241a may be provided on the surface 232a of the first substrate 230a, and the light-receiving unit 242a may be provided on the movable frame 60.

[0043] 8(B), the surface 232b of the second substrate 230b facing the movable frame 60 (+Z side) is provided with the light-receiving portion 242b, which is one of the light-emitting portion 241b and the light-receiving portion 242b of the position detection element 240b. The light-receiving portion 242b is mounted on the surface 232b so that its length direction is parallel to the X-axis direction. Furthermore, a plane PL8 that includes the light-receiving portion 242b and is perpendicular to the optical axis OA intersects with the magnet 52X of the VCM 90X and the magnet 52Y of the VCM 90Y.

[0044] The light-emitting unit 241b is attached to the movable frame 60. The light-receiving unit 242b receives light emitted by the light-emitting unit 241b, and the position detecting element 240b detects the position of the lens group L6 moved by the VCM 90X in the X-axis direction in the XY plane. Therefore, the position detecting element 240b is provided at a position facing the VCM 90X across the optical axis OA in the XY plane. Note that the light-emitting unit 241b may be provided on the surface 232b of the second substrate 230b, and the light-receiving unit 242b may be provided on the movable frame 60.

[0045] The position detecting elements 240a and 240b are, for example, PSDs (Position Sensitive Detectors), the light emitting units 241a and 241b are, for example, LEDs (Light Emitting Diodes), and the light receiving units 242a and 242b are, for example, PDs (Photo Diodes).

[0046] In this embodiment, the first substrate 230a and the second substrate 230b overlap with the VCM 90X and VCM 90Y in the radial direction, and therefore the light receiving units 242a and 242b can be disposed closer to the center of gravity G of the lens group L6 in the direction of the optical axis OA. This allows the positions at which the light emitting units 241a and 241b are attached in the movable frame 60 to be closer to the center of gravity G, and therefore the efficiency with which the VCMs 90X and 90Y drive the lens group L6 can be improved.

[0047] This point will be explained again using a comparative example. In the comparative example shown in FIGS. 9A and 9B, when the position detection elements 240a and 240b according to the embodiment are used to detect the position of the movable frame 60′ in the XY plane, the distance L from the center of gravity G of the lens group L6 to the end face of the movable frame 60′ on the first fixed frame 40 side (−Z side) is longer than in the embodiment. This is for the following reason. In the comparative example, the substrate 230 overlaps with the VCMs 90X and 90Y in the optical axis OA direction, so the light receiving units 242a and 242b are positioned closer to the −Z side than in the embodiment. Therefore, in order to make the distance between the light emitting units 241a and 241b and the light receiving units 242a and 242b the same as in the embodiment, the positions at which the light emitting units 241a and 241b are attached in the movable frame 60′ must be positioned closer to the −Z side than in the embodiment. As a result, the movable frame 60' must be extended to the -Z side, and in the comparative example, the center of gravity of the movable frame 60' including the lens group L6 is shifted from the center of gravity G of the lens group L6. Because the VCM 90X and VCM 90Y are installed so as to press the center of gravity G of the lens group L6 parallel to the XY plane, when the center of gravity of the movable frame 60' including the lens group L6 is shifted from the center of gravity G of the lens group L6, the drive efficiency of the lens group L6 deteriorates.

[0048] In this embodiment, the first substrate 230a and the second substrate 230b are disposed at positions overlapping with the VCM 90X and VCM 90Y in the radial direction, and therefore the distance between the center of gravity G of the lens group L6 and the end face of the movable frame 60 on the first fixed frame 40 side (-Z side) can be made shorter than in the comparative example. This makes it possible to prevent the center of gravity of the movable frame 60' including the lens group L6 from shifting from the center of gravity G of the lens group L6, and therefore makes it possible to improve the drive efficiency of the lens group L6 more than in the comparative example.

[0049] Next, a description will be given of an FPC (Flexible Printed Circuit) connected to the first substrate 230a and the second substrate 230b.

[0050] 6 and 7, an FPC 211 is connected to the first substrate 230a, and an FPC 212 is connected to the second substrate 230b. Furthermore, an FPC 210 is commonly connected to the first substrate 230a and the second substrate 230b. That is, a connector 233 to which the FPC 211 is connected and a connector 234 to which the FPC 210 is connected are disposed on the first substrate 230a. Furthermore, a connector 236 to which the FPC 212 is connected and a connector 237 to which the FPC 210 is connected are disposed on the second substrate 230b.

[0051] The FPC 211, for example, supplies power and inputs control signals to the motor 70 from the first substrate 230a. The FPC 211 also inputs rotation detection signals of the lock ring 20 to the first substrate 230a. On the other hand, the FPC 212 supplies power from the second substrate 230b to the position detection elements 240a and 240b, supplies power to the coils 61X and 61Y, and inputs control signals. The FPC 212 also inputs position detection signals from the position detection elements 240a and 240b to the second substrate 230b. The FPC 211 may input and output power and signals to and from the position detection elements 240a and 240b and the coils 61X and 61Y. The FPC 212 may also input and output power and signals to and from the motor 70 and the rotation detection units of the lock ring 20. Alternatively, the FPC 211 may input and output power and signals to and from the position detection elements 240a and 240b and the rotation detection unit of the lock ring 20, and the FPC 212 may input and output power and signals to and from the coils 61X and 61Y and the motor .

[0052] FPC 210 inputs power, drive signals, and the like for motor 70, the rotation detection unit of lock ring 20, position detection elements 240a and 240b, and coils 61X and 61Y from main board 200 (see FIG. 1) arranged inside lens barrel 100 to first board 230a or second board 230b. FPC 210 also outputs rotation detection signals of lock ring 20 and detection signals from position detection elements 240a and 240b, as well as signals input from FPCs 211 and 212, to main board 200 (see FIG. 1) arranged inside lens barrel 100. Main board 200 is connected to control unit 112 of camera body 101.

[0053] As described above in detail, the image stabilizer 80 according to this embodiment includes the movable frame 60 that holds the lens group L6, the fixed frame 30 that movably holds the movable frame 60, the VCMs 90X and 90Y that drive the movable frame 60 relative to the fixed frame 30 in a direction intersecting the optical axis OA, the second substrate 230b that has surfaces 231b and 232b facing each other in the optical axis OA direction and is connected to the VCMs 90X and 90Y, and the first substrate 230a that has surfaces 231a and 232a facing each other in the optical axis OA direction. A plane PL2 that includes the surface 232a of the first substrate 230a intersects with the VCMs 90X and 90Y, and a plane PL4 that includes the surface 232b of the second substrate 230b intersects with the VCMs 90X and 90Y. In other words, the first substrate 230a and the second substrate 230b at least partially overlap with the VCMs 90X and 90Y in the radial direction. Furthermore, the first substrate 230a and the second substrate 230b do not overlap with the VCMs 90X and 90Y in the optical axis OA direction. This, as described above, reduces the thickness of the image stabilization device 80 in the optical axis OA direction, making it possible to make the image stabilization device 80 thinner. Furthermore, the drive efficiency of the movable frame 60 can be improved.

[0054] Furthermore, in this embodiment, the fixed frame 30 has a substantially annular shape when viewed in the direction of the optical axis OA, and in a plane perpendicular to the optical axis OA, the first substrate 230a and the second substrate 230b are disposed between the inner and outer peripheries of the fixed frame 30 and surround part of the inner periphery. This allows the first substrate 230a and the second substrate 230b to be disposed so as to overlap with the VCMs 90X and 90Y in the radial direction. Furthermore, the first substrate 230a and the second substrate 230b can be disposed so as not to overlap with the VCMs 90X and 90Y in the direction of the optical axis OA.

[0055] Furthermore, in this embodiment, the image stabilization device 80 has light-emitting units 241a and 241b and light-receiving units 242a and 242b, and is equipped with position detection elements 240a and 240b that detect the position of the movable frame 60 relative to the fixed frame 30, with the first substrate 230a holding the light-receiving unit 242a and the second substrate 230b holding the light-receiving unit 242b. This makes it possible to supply power to the light-receiving units 242a and 242b without using wiring.

[0056] In addition, in this embodiment, since the first substrate 230a and the second substrate 230b are separate bodies, the first substrate 230a and the second substrate 230b can be used as substrates for other image stabilization devices. Figure 10 is a diagram for explaining the use of the first substrate 230a and the second substrate 230b.

[0057] As shown in FIG. 10, the same first substrate 230a and second substrate 230b can be attached to fixed frames 40A and 40B that have different outer diameters.

[0058] In this embodiment, in a plane perpendicular to the optical axis OA, the first substrate 230a is disposed at a position facing the VCM 90Y across the optical axis OA, and the second substrate 230b is disposed at a position facing the VCM 90X across the optical axis OA. The first substrate 230a and the second substrate 230b are provided with the light receiving units 242a and 242b of the position detecting elements 240a and 240b, respectively, and this arrangement improves the position detection accuracy of the movable frame 60.

[0059] Furthermore, in this embodiment, the image stabilization device 80 includes a lock ring 20 that restricts movement of the movable frame 60 relative to the fixed frame 30, and a motor 70 that drives the lock ring 20, and the motor 70 is disposed between the first board 230a and the second board 230b in the circumferential direction centered on the optical axis OA. This allows the FPC 210 connected to the main board 200 to be easily connected to the first board 230a and the second board 230b.

[0060] In the above embodiment, two substrates, the first substrate 230a and the second substrate 230b, are attached to the first fixed frame 40, but as shown in FIG. 11(A), one substrate 230c may be attached to the first fixed frame 40.

[0061] Figure 11(A) is a plan view showing a substrate 230c according to another embodiment, Figure 11(B) is a cross-sectional view taken along line DD in Figure 11(A), and Figure 11(C) is a cross-sectional view taken along line EE in Figure 11(A).

[0062] 11(A), one substrate 230c has a shape that surrounds part of the inner periphery of the first fixing frame 40. In this case, as shown in Fig. 11, for example, a hole through which the motor 70 passes may be provided in the substrate 230c, and the motor 70 may be disposed therein, or the motor 70 may be disposed in an area where no substrate 230c is present. Note that three or more substrates may be attached to the first fixing frame 40.

[0063] 11(B) and 11(C), the substrate 230c has surfaces 231c and 232c that face each other in the optical axis OA direction, and a plane PL11 including the surface 231c and a plane PL12 including the surface 232c intersect with the VCMs 90X and 90Y. That is, the substrate 230c overlaps with the VCMs 90X and 90Y in the radial direction. Furthermore, the substrate 230c does not overlap with either the VCMs 90X or VCMs 90Y in the optical axis OA direction.

[0064] Furthermore, on the surface 232c on the movable frame 60 side (+Z side) of the substrate 230c, a light receiving portion 242a of the position detector 240a is provided at a position facing the VCM 90Y, and a light receiving portion 242b of the position detector 240b is provided at a position facing the VCM 90X. A plane PL17 including the light receiving portion 242a and a plane PL18 including the light receiving portion 242b intersect with the magnets 52Y and 52X of the VCMs 90Y and 90X, respectively. In this way, even with a single substrate 230c, the image stabilizer 80 can be made thinner by having the substrate 230c surround a portion of the inner periphery of the first fixed frame 40 (but not the entire inner periphery). Note that in other embodiments, it is sufficient that at least the plane PL12 including the surface 232c intersects with the VCMs 90Y and 90X.

[0065] Furthermore, in the above embodiment, a lens movement type image stabilization device 80 that drives the lens group L6 has been described, but the present invention is not limited to this and can also be applied to an image sensor movement type image sensor that drives an image sensor.

[0066] Furthermore, the image stabilization device described in the above embodiment is not limited to compact digital cameras and single-lens reflex digital cameras, but can also be applied to optical devices such as video cameras, binoculars, microscopes, telescopes, and mobile phones.

[0067] The above-described embodiment is a preferred example of implementation, but is not limited to this, and various modifications are possible within the scope of the gist, and any constituent elements may be combined. [Explanation of symbols]

[0068] 20 Lock ring 30 fixed frames 40 First Fixed Frame 50 Second Fixed Frame 52X, 52Y Magnet 53X, 53Y York 60 Movable frame 61X, 61Y coil 70 Motor 80 Image Stabilizer 90X, 90Y VCM 112 Control section L6 lens group 200 Main board 230a First substrate 230b 2nd board 230c board 231a, 232a First substrate surface 231b, 232b Second substrate surface 240a, 240b position detection element 241a, 241b Light-emitting part 242a,242b Light receiving part

Claims

1. a lens holding frame for holding a lens; a fixed frame that movably holds the lens holding frame; a drive unit that drives the lens holding frame relative to the fixed frame in a direction intersecting the optical axis; a first substrate having a substantially plate-like shape and including a first surface and a second surface facing each other in the optical axis direction and connected to the drive unit; a second substrate having a substantially plate shape separate from the first substrate, the second substrate having a third surface and a fourth surface facing each other in the optical axis direction and connected to the drive unit; a flexible substrate connected to the first substrate and the second substrate; a main board connected to the flexible board and holding a communication unit for communicating with the camera body; a locking member that restricts movement of the lens holding frame relative to the fixed frame; a third drive unit that drives the lock member; Equipped with the first substrate and the second substrate are disposed at positions not overlapping with the driving unit in the optical axis direction, a first plane including the first surface of the first substrate and a third plane including the third surface of the second substrate include at least a part of the driving unit; a tip end of the flexible substrate is bifurcated, one tip end of the bifurcated tip end is connected to the first substrate and the other tip end is connected to the second substrate; the third drive unit is disposed between the first substrate and the second substrate in a circumferential direction centered on the optical axis, and between the one tip end portion and the other tip end portion; Image stabilization device.

2. the first substrate, the second substrate, the drive unit, and the third drive unit are arranged at positions that do not overlap with one another in the optical axis direction; The image stabilization device according to claim 1 .

3. the first plane is disposed closer to the lens holding frame than a second plane including the second surface of the first substrate, the third plane is disposed closer to the lens holding frame than a fourth plane including the fourth surface of the second substrate; 3. The image stabilization device according to claim 1.

4. The second plane and the fourth plane include at least a part of the drive unit. The image stabilization device according to claim 3 .

5. When viewed from the optical axis direction, the fixed frame has a substantially annular shape, In a plane perpendicular to the optical axis, the first substrate and the second substrate are disposed between an inner periphery and an outer periphery of the fixing frame and surround a part of the inner periphery.

3. The image stabilization device according to claim 1.

6. a detection unit having a light emitting unit and a light receiving unit, and detecting the position of the lens holding frame relative to the fixed frame; At least one of the first substrate and the second substrate holds the light receiving unit.

3. The image stabilization device according to claim 1.

7. a fifth plane including at least a part of the detection unit and perpendicular to the optical axis intersects with the drive unit; The image stabilization device according to claim 6.

8. the detection unit includes a first detection unit that detects a position of the lens holding frame with respect to the fixed frame in a first direction, and a second detection unit that detects a position of the lens holding frame with respect to the fixed frame in a second direction that intersects with the first direction, the first substrate holds a light receiving portion of the first detection unit; the second substrate holds a light receiving portion of the second detection unit; The image stabilization device according to claim 6.

9. the drive unit includes a first drive unit that generates a drive force in a first direction and a second drive unit that generates a drive force in a second direction; the first substrate is disposed at a position facing the first driving unit across the optical axis in a plane perpendicular to the optical axis, the second substrate is disposed at a position facing the second driving unit across the optical axis in a plane perpendicular to the optical axis; 3. The image stabilization device according to claim 1.

10. A lens barrel comprising the image stabilization device according to claim 1 or 2.

11. An imaging device comprising the image stabilization device according to claim 1 or 2.

Images