Image blur correction device and imaging device

Abstract

This image blur correction device is provided with: an imaging element having an imaging plane in which a plurality of pixels are arranged; a first support member that supports the imaging element; a second support member that movably supports the first support member; and a drive unit that drives the first support member relative to the second support member. The drive unit includes a first drive unit that drives the first support member in a first direction in the imaging plane, and two second drive units that drive the first support member in a second direction orthogonal to the first direction in the imaging plane. The first drive unit is provided with a coil wound in a substantially rectangular shape, and a magnet. When the imaging element is viewed from a third direction orthogonal to the imaging plane, one of the two long sides of the coil overlaps the imaging element.

Description

Image blur correction device and imaging device

[0001] The present invention relates to an image stabilization device and an imaging device.

[0002] A vibration reduction device has been proposed that reduces blurring of a captured image caused by camera shake or the like by driving an image sensor within a camera body (see, for example, Japanese Patent Application Laid-Open No. 2003-222294). There is a demand for miniaturization of vibration reduction devices.

[0003] Japanese Patent Application Laid-Open No. 2020-101783

[0004] According to a first aspect, an image stabilization device includes an imaging element having an imaging surface on which a plurality of pixels are arranged, a first support member that supports the imaging element, a second support member that movably supports the first support member, and a drive unit that drives the first support member relative to the second support member, wherein the drive unit includes a first drive unit that drives the first support member in a first direction within the imaging surface, and two second drive units that drive the first support member in a second direction within the imaging surface that is perpendicular to the first direction, and the first drive unit includes a coil wound in a substantially rectangular shape and a magnet, and when the imaging element is viewed from a third direction that is perpendicular to the imaging surface, one of two long sides of the coil overlaps with the imaging element.

[0005] According to a second aspect, an imaging device includes the image blur correction device described above.

[0006] 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.

[0007] FIG. 1 is a diagram schematically illustrating an example configuration of a digital camera according to an embodiment. FIG. 2(A) is a front view of an image stabilization device, and FIG. 2(B) is a perspective view of an image sensor and an image sensor drive unit. FIG. 3 is an exploded perspective view of the image sensor and the image sensor drive unit as viewed from the -Z direction. FIG. 4 is an exploded perspective view of the image sensor and the image sensor drive unit as viewed from the +Z direction. FIG. 5 is a diagram illustrating the connection relationship between the components of the image sensor and the image sensor drive unit. FIG. 6 is a diagram illustrating the shape of the coil. FIG. 7(A) is a perspective view showing the scope of the image sensor, and FIG. 7(B) is a plan view illustrating the arrangement of the coil. FIGS. 8(A) and 8(B) are diagrams illustrating the arrangement and polarity of the magnets, and are plan views of a second support member as viewed from the -Z direction. FIG. 9(A) is a plan view of the image sensor drive unit connected to a flexible printed circuit board as viewed from the +Z direction, and FIG. 9(B) is a perspective view of the image sensor drive unit connected to a flexible printed circuit board. Figures 10(A) and 10(B) are diagrams showing another example of coil arrangement, Figure 11 is a diagram showing another example of coil arrangement, and Figures 12(A) and 12(B) are diagrams showing another example of coil arrangement.

[0008] FIG. 1 is a diagram schematically illustrating an example configuration of a digital camera 100 according to an embodiment. For ease of explanation and understanding, an XYZ Cartesian coordinate system is appropriately provided in the drawings below. In this coordinate system, the +Z direction is the direction from the subject toward the camera body 10 when the photographer is in a camera position (hereinafter referred to as the normal position) capturing a landscape image with the optical axis OA horizontal. The +X direction is the direction toward the right in the normal position. The +Y direction is the direction toward the top in the normal position. The scales of the shapes, lengths, thicknesses, and other features of the various components illustrated in the embodiments do not necessarily correspond to the actual objects, and parts not necessary for explanation have been omitted or simplified as appropriate.

[0009] The digital camera 100 includes an interchangeable lens 20 and a camera body 10. The interchangeable lens 20 is attached to the camera body 10 via a lens mount. Note that the digital camera 100 may be configured as a camera with an integrated lens rather than an interchangeable lens type.

[0010] The interchangeable lens 20 includes an imaging optical system 21 including, for example, a zoom lens, a focus lens, an aperture, and an anti-vibration lens, a lens control unit 22, and lens-side electronic contacts 23. The lens control unit 22 includes peripheral components such as a CPU (Central Processing Unit) and memory. The lens control unit 22 performs drive control of the focus lens and aperture, detects the positions of the zoom lens and focus lens, and transmits lens information to the camera body 10 and receives camera information from the camera body 10 via the lens-side electronic contacts 23.

[0011] The camera body 10 includes, for example, an image sensor 11, an image sensor drive unit 12, a display unit 13, a body control unit 14, a battery 15, an operation unit 16, and body-side electronic contacts 17.

[0012] The operation unit 16 includes a shutter button, operation members for various settings, etc. The display unit 13 is, for example, a liquid crystal monitor (also called a rear monitor) mounted on the rear surface of the camera body 10.

[0013] The body control unit 14 includes a CPU and peripheral components such as memory. The body control unit 14 controls the operation of the digital camera 100, such as driving and controlling the image sensor 11, reading out image signals from the image sensor 11, performing focus detection calculations and focusing the interchangeable lens 20, displaying and recording image data, and driving and controlling the image sensor drive unit 12. The body control unit 14 also communicates with the lens control unit 22 via the body-side electronic contacts 17, receiving lens information and sending camera information (such as defocus amount and aperture value).

[0014] The image sensor drive unit 12 suppresses blurring of the captured image due to camera shake or the like by driving the image sensor 11. That is, the image sensor 11 and the image sensor drive unit 12 constitute an image blur correction device 200. FIG. 2A is a front view of the image blur correction device 200, and FIG. 2B is a perspective view of the image sensor 11 and the image sensor drive unit 12. FIG. 3 is an exploded perspective view of the image sensor 11 and the image sensor drive unit 12 as viewed from the -Z direction, and FIG. 4 is an exploded perspective view of the image sensor 11 and the image sensor drive unit 12 as viewed from the +Z direction. FIG. 5 is an exploded perspective view illustrating the connection relationship between the first unit 30 and the second support member 50.

[0015] 2A and 2B, the image sensor 11 has an image sensing surface 11a on which a plurality of pixels are arranged. The image sensing surface 11a is parallel to the XY plane.

[0016] The imaging element driving unit 12 includes a first front yoke 31 , a second front yoke 32 , a metal heat sink 33 , a first support member 40 , a second support member 50 , and a back yoke 60 .

[0017] The first front yoke 31 and the second front yoke 32 are fixed to a heat sink 33 (heat sink member). The first front yoke 31, the second front yoke 32, and the heat sink 33 may be collectively referred to as a first unit 30.

[0018] The heat sink 33 is provided between the image sensor 11 and the first support member 40, with a portion facing the +Z side surface of the image sensor 11. A connecting member (not shown) that thermally connects the heat sink 33 to the housing of the digital camera 100 is connected to the heat sink 33. For example, in FIG. 3 , a heat dissipation sheet is attached to the upper surface of a portion 33a that is bent 90 degrees in the −Z direction at the top of the heat sink 33, and the sheet is brought into contact with the housing of the camera 100. In this case, the sheet corresponds to the connecting member, and heat dissipation via the housing of the camera 100 is possible.

[0019] Heat generated by the imaging element 11 is transferred through the air to the first front yoke 31, the second front yoke 32, and the heat sink 33. Because the first front yoke 31 and the second front yoke 32 are fixed to the heat sink 33, the heat transferred to the first front yoke 31 and the second front yoke 32 is transferred to the heat sink 33 and then transferred to, for example, the housing of the digital camera 100 via a connecting member (not shown), and is then radiated to the outside of the digital camera 100.

[0020] The imaging element 11 is fixed to the first support member 40. Specifically, as shown by the dashed line in Fig. 2B , the protrusions 43 of the first support member 40 are inserted into the engagement holes 112 of the imaging element 11, and the imaging element 11 is screwed to the protrusions 42 of the first support member 40 with screws 111 or the like, thereby fixing the first support member 40 and the imaging element 11. As shown in Fig. 2B , the protrusions 42 and 43 do not overlap with the first unit 30 in a direction perpendicular to the imaging surface 11 a of the imaging element 11.

[0021] 3 and 4, the first support member 40 is disposed between the first unit 30 and the second support member 50. The first unit 30 and the second support member 50 are fixed within the camera body 10 and do not move relative to the camera body 10.

[0022] The first unit 30 is fixed to the second support member 50. Specifically, as shown by the two-dot chain line in Fig. 5 , the first unit 30 is fixed to the second support member 50 by screwing the first unit 30 to the protrusions 51a, 51b of the second support member 50 with screws 301 or the like.

[0023] The second support member 50 movably supports the first support member 40 between itself and the first unit 30. Specifically, as shown in Fig. 5 , a protrusion 51a of the second support member 50 is fixed to the first unit 30 via a hole 41 that is larger than the protrusion 51a and that is provided in the first support member 40, and a protrusion 51b of the second support member 50 is fixed to the first unit 30 below the first support member 40, thereby movably supporting the first support member 40 by the second support member 50. As a result, the image sensor 11 fixed to the first support member 40 can move integrally with the first support member 40 relative to the camera body 10.

[0024] The image sensor drive unit 12 also includes two first drive units 70X1 and 70X2 that drive the first support member 40 (the image sensor 11 supported by the first support member 40) in the X direction, and two second drive units 70Y1 and 70Y2 that drive the image sensor 11 around the Y and Z directions. In this embodiment, VCMs (Voice Coil Motors) are used as the first drive units 70X1 and 70X2 and the second drive units 70Y1 and 70Y2. In the following description, the two first drive units 70X1 and 70X2 will be referred to as the first VCM 70X1 and the second VCM 70X2, respectively, and the two second drive units 70Y1 and 70Y2 will be referred to as the third VCM 70Y1 and the fourth VCM 70Y2, respectively.

[0025] The first VCM 70X1 includes a coil 71X1 and two magnets 72X1a and 72X1b. The second VCM 70X2 includes a coil 71X2 and two magnets 72X2a and 72X2b. The third VCM 70Y1 includes a coil 71Y1 and two magnets 72Y1a and 72Y1b. The fourth VCM 70Y2 includes a coil 71Y2 and two magnets 72Y2a and 72Y2b. The coils 71X1, 71X2, 71Y1, and 71Y2 are supported (fixed) by the first support member 40.

[0026] 6 is a diagram for explaining the configuration of the coils 71X1, 71X2, 71Y1, and 71Y2. Each of the coils 71X1, 71X2, 71Y1, and 71Y2 is wound in a substantially rectangular shape.

[0027] Each of the coils 71X1 and 71X2 has two long sides 711Xa and two short sides 711Xb, which extend in the Y direction and the X direction, respectively.

[0028] Each of the coils 71Y1 and 71Y2 has two long sides 711Ya and two short sides 711Yb, which extend in the X direction and the Y direction, respectively.

[0029] Next, the arrangement of the coils 71X1 and 71X2 and the coils 71Y1 and 71Y2 in this embodiment will be described. Fig. 7A is a perspective view showing the range of the image sensor 11, and Fig. 7B is a plan view for explaining the arrangement of the coils 71X1 and 71X2 and the coils 71Y1 and 71Y2. Figs. 7A and 7B show the image sensor 11 as viewed from the +Z direction.

[0030] In FIG. 7A, the hatched area indicates the area of ​​the imaging element 11. As shown in FIG. 7B, in this embodiment, when the imaging element 11 is viewed from the Z direction, both of the two long side portions 711Xa of the coils 71X1 and 71X2 overlap with the imaging element 11. In other words, when the imaging element 11 is viewed from the Z direction, the coils 71X1 and 71X2 are each disposed within the range of the imaging element 11 in the X direction. This allows the size of the imaging element drive unit 12 in the X direction to be reduced compared to a case in which none of the long side portions of the coils of the VCM that drive the imaging element in the X direction overlap with the imaging element, as in Patent Document 1. Note that in this embodiment, when the imaging element 11 is viewed from the Z direction, both of the two short side portions 711Xb also overlap with the imaging element 11. In other words, when the imaging element 11 is viewed from the Z direction, the coils 71X1 and 71X2 are each disposed within the range of the imaging element 11 in the Y direction.

[0031] The coils 71X1 and 71X2 are arranged on either side of a straight line CL1 that passes through the center of the image sensor 11 in the X direction and extends in the Y direction. By arranging them in this manner, the first support member 40 (image sensor 11) can be driven in a balanced manner.

[0032] When the imaging element 11 is viewed from the Z direction, one of the two long sides 711Ya of each of the coils 71Y1 and 71Y2 overlaps with the imaging element 11. In other words, when the imaging element 11 is viewed from the Z direction, a portion of each of the coils 71Y1 and 71Y2 is disposed within the range of the imaging element 11 in the Y direction. In this way, when the imaging element 11 is viewed from the Z direction, one of the two long sides 711Ya of each of the coils 71Y1 and 71Y2 overlaps with the imaging element 11. Therefore, the size of the imaging element drive unit 12 in the Y direction can be reduced compared to, for example, a case in which none of the long sides of the coils of the VCM that drives the imaging element in the Y direction overlaps with the imaging element, as in Patent Document 1.

[0033] In this way, by arranging the coils 71X1 and 71X2 and the coils 71Y1 and 71Y2 as shown in FIG. 7B, the image pickup element driving unit 12 can be made smaller.

[0034] Next, the arrangement and polarity of the magnets 72X1a, 72X1b, 72X2a, and 72X2b will be described with reference to Fig. 8A, which is a plan view of the second support member 50 as viewed from the -Z direction.

[0035] The two magnets 72X1a (first magnet) and 72X1b (second magnet) included in the first VCM 70X1 are supported (fixed) by the second support member 50. When the imaging element 11 is viewed from the Z direction, the two magnets 72X1a and 72X1b are arranged side by side in order in the X direction outward from a line CL1 that passes through the center of the imaging element 11 and extends in the Y direction, and the magnet 72X1a is arranged more inward (closer to the center) than the magnet 72X1b in the X direction. The polarities of the surfaces of the two magnets 72X1a and 72X1b that face the coil 71X1 are opposite to each other.

[0036] The two magnets 72X2a (first magnet) and 72X2b (second magnet) included in the second VCM 70X2 are supported (fixed) by the second support member 50. When the imaging element 11 is viewed from the Z direction, the two magnets 72X2a and 72X2b are arranged side by side in order from a line CL1 that passes through the center of the imaging element 11 in the X direction and extends in the Y direction toward the outside. In other words, the magnet 72X2a is arranged more inward (closer to the center) than the magnet 72X2b. The polarities of the surfaces of the two magnets 72X2a and 72X2b that face the coil 71X2 are opposite to each other.

[0037] In this embodiment, the polarity of the surface of the central magnet 72X1a of the magnets 72X1a, 72X1b of the first VCM 70X1 facing the coil 71X1 and the polarity of the surface of the central magnet 72X2a of the magnets 72X2a, 72X2b of the second VCM 70X2 facing the coil 71X2 are the same, that is, north poles.

[0038] Of the magnets 72X1a and 72X1b of the first VCM 70X1, the magnet 72X1b furthest from the center has a surface facing the coil 71X1 that is opposite in polarity (south pole) to the magnet 72X1a.Furthermore, of the magnets 72X2a and 72X2b of the second VCM 70X2, the magnet 72X2b furthest from the center has a surface facing the coil 71X2 that is opposite in polarity (south pole) to the magnet 72X2a.

[0039] If the magnets 72X1a and 72X2a had different polarities, a magnetic flux would flow from the magnet 72X1a to the magnet 72X2a, or from the magnet 72X2a to the magnet 72X1a, which could adversely affect the operation of the first VCM 70X1 and the second VCM 70X2. Therefore, the magnets 72X1a and 72X2a near the center have the same polarity.

[0040] As shown in FIG. 8B, the polarity of the surface of the magnet 72X1a near the center facing the coil 71X1 and the polarity of the surface of the magnet 72X2a near the center facing the coil 71X2 may be set to an S pole.

[0041] By passing a current through coil 71X1, which is arranged in the magnetic circuit formed by magnets 72X1a and 72X1b, and coil 71X2, which is arranged in the magnetic circuit formed by magnets 72X2a and 72X2b, coil 71X1 and coil 71X2 are subjected to a Lorentz force, which causes the first support member 40 (image pickup element 11) to move in the X direction.

[0042] When a current flows through the coil 71Y1, which is disposed in the magnetic circuit formed by the magnets 72Y1a and 72Y1b, the coil 71Y1 is subjected to a Lorentz force, and when a current flows through the coil 71Y2, which is disposed in the magnetic circuit formed by the magnets 72Y2a and 72Y2b, the coils 71X1 and 71X2 are subjected to a Lorentz force.

[0043] When a current is passed through the coils 71Y1 and 71Y2 so that they receive forces in the same direction, the first support member 40 (image pickup element 11) moves parallel to the Y direction. When a current is passed through the coils 71Y1 and 71Y2 so that they receive forces in opposite directions, the first support member 40 (image pickup element 11) moves rotationally around a rotation axis parallel to the Z direction. Therefore, the image pickup element 11 can move parallel to the imaging surface (within the XY plane) and rotate around the Z axis.

[0044] The position of the first support member 40 (image pickup element 11) is detected by position detection sensors 75X, 75Y1, and 75Y2 provided on the first support member 40 (see FIGS. 3 and 6). Specifically, the position detection sensor 75X detects the position of the first support member 40 in the X direction. The position detection sensors 75Y1 and 75Y2 detect the position of the first support member 40 in the Y direction and around the Z direction. The position detection sensors 75X, 75Y1, and 75Y2 are, for example, Hall elements, but are not limited to this.

[0045] In this embodiment, the image sensor driving unit 12 also includes a biasing mechanism 80 that biases the first support member 40 toward the second support member 50. The biasing mechanism 80 includes a magnet 81 (third magnet) (see FIG. 3) fixed to the second support member 50, and a magnetic member 82 (see FIG. 4) that is fixed to the first support member 40 and magnetically attracted to the magnet 81. The biasing mechanism 80 allows the first support member 40 to be positioned in the Z direction.

[0046] The magnet 81 is disposed between the magnet 72X1a of the first VCM 70X1 and the magnet 72X2a of the second VCM 70X2 in the X direction. As described above, in this embodiment, the magnets 72X1a and 72X2a closest to the magnet 81 have the same polarity. If the magnets 72X1a and 72X2a closest to the magnet 81 have the same polarity, the polarity of the magnet 81 of the biasing mechanism 80 does not have a significant effect on the magnetic flux. Therefore, the polarity of the magnet 81 of the biasing mechanism 80 may be the same polarity as the magnets 72X1a and 72X2a closest to the magnet 81, or may be the opposite polarity.

[0047] 4, in this embodiment, a back yoke 60 is disposed on the +Z side surface of the second support member 50. When viewed from the Z direction, the back yoke 60 has a shape that overlaps with at least the magnets 72X1a, 72X1b, 72X2a, 72X2b, 72Y1a, 72Y1b, 72Y2a, and 72Y2b.

[0048] As shown in FIG. 4, the back yoke 60 has a notch 61 for accommodating a connector for connecting a flexible printed circuit board.

[0049] Figure 9(A) is a plan view of the image sensor driving unit 12 to which flexible printed circuit boards 91 and 92 are connected, viewed from the +Z direction, and Figure 9(B) is an oblique view of the image sensor driving unit 12 to which flexible printed circuit boards 91 and 92 are connected.

[0050] As shown in FIG. 9A , a connector 93 that connects flexible printed circuit boards 91 and 92 is housed in a cutout portion 61 of the back yoke 60. The position of the upper surface of the connector 93 in the Z direction is lower than the position of the upper surface of the back yoke 60 in the Z direction. If the back yoke 60 does not have the cutout portion 61, for example, the connector 93 would be disposed on the back yoke 60. In this case, the size of the image sensor drive unit 12 in the Z direction would increase. In this embodiment, because the back yoke 60 has the cutout portion 61 that houses the connector 93, it is possible to prevent the size of the image sensor drive unit 12 from increasing in the Z direction.

[0051] As described above in detail, according to this embodiment, the image blur correction device 200 includes the image sensor 11 having the imaging surface 11a on which a plurality of pixels are arranged, the first support member 40 that supports the image sensor 11, and the second support member 50 that movably supports the first support member 40. The image blur correction device 200 also includes a first VCM 70X1 and a second VCM 70X2 that drive the first support member 40 in the X direction within the imaging surface 11a (in an XY plane parallel to the imaging surface 11a), and a third VCM 70Y1 and a fourth VCM 70Y2 that drive the first support member 40 in the Y direction orthogonal to the X direction within the imaging surface 11a and around the Z direction orthogonal to the imaging surface 11a. The first VCM 70X1 includes a coil 71X1 wound in a substantially rectangular shape and magnets 72X1a and 72X1b, and when the imaging element 11 is viewed from the Z direction, both of the two long sides 711Xa of the coil 71X1 overlap the imaging element 11. The second VCM 70X2 includes a coil 71X2 wound in a substantially rectangular shape and magnets 72X2a and 72X2b, and when the imaging element 11 is viewed from the Z direction, both of the two long sides 711Xa of the coil 71X2 overlap the imaging element 11. This allows the size of the image blur correction device 200 in the X direction to be smaller than when neither of the two long sides 711Xa of the coil 71X1 nor the coil 71X2 overlaps the imaging element 11 when the imaging element 11 is viewed from the Z direction.

[0052] In this embodiment, the first VCM 70X1 and the second VCM 70X2 are disposed on either side of a straight line CL1 that passes through the center of the imaging element 11 and extends in the Y direction. This allows the first support member 40 to be driven in the X direction in a balanced manner.

[0053] In this embodiment, the first VCM 70X1 includes magnets 72X1a and 72X1b arranged side by side in order from the center outward in the X direction, and the second VCM 70X2 includes magnets 72X2a and 72X2b arranged side by side in order from the center outward in the X direction. The polarity of the surface of magnet 72X1a of the first VCM 70X1 facing coil 71X1 is the same as the polarity of the surface of magnet 72X2a of the second VCM 70X2 facing coil 71X2. If adjacent magnets 72X1a and 72X2a have different polarities, magnetic flux may flow from magnet 72X1a to magnet 72X2a or from magnet 72X2a to magnet 72X1a, which may adversely affect the operation of the first VCM 70X1 and the second VCM 70X2. By making the adjacent magnets 72X1a and 72X2a have the same polarity, the first VCM 70X1 and the second VCM 70X2 can be driven stably.

[0054] Furthermore, in this embodiment, the image blur correction device 200 includes a biasing mechanism 80 that biases the first support member 40 toward the second support member 50 in the Z direction. The biasing mechanism 80 includes a magnet 81 and a magnetic member 82 that is magnetically attracted to the magnet 81, and the magnet 81 is disposed between the magnet 72X1a of the first VCM 70X1 and the magnet 72X2a of the second VCM 70X2 in the X direction. This allows the first support member 40 to be positioned in the Z direction.

[0055] Furthermore, in this embodiment, the third VCM 70Y1 and the fourth VCM 70Y2 each include coils 71Y1 and 71Y2 wound in a substantially rectangular shape and magnets 72Y1a, 72Y1b ​​and 72Y2a, 72Y2b, respectively, and when the imaging element 11 is viewed from the Z direction, one of the two long sides 711Ya of the coils 71Y1 and 71Y2 of the third VCM 70Y1 and the fourth VCM 70Y2 overlaps with the imaging element 11. This allows the size of the image blur correction device 200 in the Y direction to be smaller than when neither of the two long sides 711Ya overlaps with the imaging element 11.

[0056] In this embodiment, the image blur correction device 200 also includes a heat sink 33 that dissipates heat generated by the imaging element 11. The heat sink 33 is disposed between the imaging element 11 and the first support member 40 so that at least a portion of the heat sink 33 faces the imaging element 11. In this embodiment, the image blur correction device 200 also includes a first front yoke 31 and a second front yoke 32 that are disposed between the imaging element 11 and the first support member 40, and the heat sink 33 is connected to the first front yoke 31 and the second front yoke 32. Because the long side portions 711Xa of the coils 71X1 and 71X2 overlap the imaging element 11, the first front yoke 31 and the second front yoke 32 are also disposed so as to overlap with the imaging element 11. This allows heat generated by the imaging element 11 to be transmitted to the first front yoke 31 and the second front yoke 32 via the air. Since the first front yoke 31 and the second front yoke 32 are connected to the heat sink 33, heat transferred to the first front yoke 31 and the second front yoke 32 can be dissipated via the heat sink 33. This improves heat dissipation efficiency compared to when the first front yoke 31 and the second front yoke 32 do not overlap the imaging element 11.

[0057] Furthermore, in this embodiment, image blur correction device 200 includes a back yoke 60 fixed to the surface of second support member 50 opposite the surface facing first support member 40. Back yoke 60 has a cutout portion 61 that accommodates connector 93 for connecting flexible printed circuit boards 91, 92. This allows the size of image blur correction device 200 in the Z direction to be smaller than when back yoke 60 does not have cutout portion 61.

[0058] In the above embodiment, the coils 71X1, 71X2, 71Y1, and 71Y2 are fixed to the first support member 40, and the magnets 72X1a, 72X1b, 72X2a, 72X2b, 72Y1a, 72Y1b, 72Y2a, and 72Y2b are fixed to the second support member 50. However, this is not limitative. The magnets 72X1a, 72X1b, 72X2a, 72X2b, 72Y1a, 72Y1b, 72Y2a, and 72Y2b may be fixed to the first support member 40, and the coils 71X1, 71X2, 71Y1, and 71Y2 may be fixed to the second support member 50.

[0059] Furthermore, the arrangement of the coils 71X1, 71X2, 71Y1, and 71Y2 is not limited to that in the above embodiment.

[0060] (Variation 1) Fig. 10A is a diagram showing another example of the arrangement of the coils 71X1, 71X2, 71Y1, and 71Y2. As shown in Fig. 10A, the coil 71Y2 may be arranged so that, when the imaging element 11 is viewed from the Z direction, both of the two long side portions 711Ya of one of the coils 71Y1 and 71Y2 overlap with the imaging element 11. Since the other configurations are the same as those of the embodiment, detailed description will be omitted. In the arrangement of Variation 1, the positions of the coils 71Y1 and 71Y2 in the Y direction are close to the center of the imaging element 11, so the coils 71Y1 and 71Y2 can rotate the imaging element 11 around the vicinity of the center of the imaging element 11.

[0061] (Variation 2) Fig. 10B is a diagram showing another example of the arrangement of the coils 71X1, 71X2, 71Y1, and 71Y2. As shown in Fig. 10B, the coils 71Y1 and 71Y2 may be arranged so that, when the imaging element 11 is viewed from the Z direction, both of the two long side portions 711Ya of the coils 71Y1 and 71Y2 overlap with the imaging element 11. This allows the size of the imaging element drive unit 12 in the Y direction to be further reduced. The other configurations are the same as those in the embodiment, so detailed description will be omitted.

[0062] (Variation 3) FIG. 11 illustrates another example of the arrangement of coils 71X1, 71X2, 71Y1, and 71Y2. As illustrated in FIG. 11 , coils 71X1 and 71X2 may be positioned differently in the Y direction as long as they are positioned on both sides of a line CL1 that passes through the center of the image sensor 11 and extends in the Y direction within the image sensor 11. Coils 71Y1 and 71Y2 may also be positioned differently in the Y direction. In Variation 3, coils 71Y1 and 71Y2 are also positioned so that both long side portions 711Ya of coils 71Y1 and 71Y2 overlap with the image sensor 11 when viewed from the Z direction. This allows the size of the image sensor drive unit 12 in the Y direction to be further reduced. The remaining configuration is similar to that of the embodiment, and detailed description thereof will be omitted. In the arrangement of Variation 3, coils 71X1 and 71X2 may rotate the image sensor 11 around the Z direction. The imaging element 11 may also be rotated around the Z direction by the coils 71X1 and 71X2 and the coils 71Y1 and 71Y2.

[0063] (Variation 4) In the embodiment and variations 1 to 3, two first drive units (first VCM 70X1 and second VCM 70X2) are provided to drive the image sensor 11 in the X direction, but a single drive unit may be provided to drive the image sensor 11 in the X direction. In this case, as shown in Fig. 12A, for example, by arranging the coil 71X of the drive unit that drives the image sensor 11 in the X direction so that at least one of the two long sides 711Xa overlaps with the image sensor 11 when the image sensor 11 is viewed from the Z direction, the image sensor drive unit 12 can be made smaller.

[0064] (Variation 5) In the embodiment and variations 1 to 3, the first VCM 70X1 and the second VCM 70X2 drive the image sensor 11 in the X direction, and the third VCM 70Y1 and the fourth VCM 70Y2 drive the image sensor 11 in the Y direction and around the Z direction, but this is not limited to this. For example, the coils 71 of the VCMs that drive the image sensor 11 may be arranged as shown in FIG. 12B. Even in the case shown in FIG. 12B, when the image sensor 11 is viewed from the Z direction, both of the two long sides 711a of each coil 71 overlap the image sensor 11, allowing the image sensor drive unit 12 to be made smaller.

[0065] In the above embodiment and its modified examples 1 to 4, when the imaging element 11 is viewed from the Z direction, both of the two long side portions 711Xa of the coils 71X1, 71X2, and 71X overlap with the imaging element 11, but it is sufficient that at least one of the two long side portions 711Xa overlaps with the imaging element 11. Even in this case, the size of the imaging element drive unit 12 in the X direction can be reduced.

[0066] 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.

[0067] REFERENCE SIGNS LIST 11 imaging element 11a imaging surface 12 imaging element drive unit 33 heat sink 40 first support member 50 second support member 60 back yoke 70X1 first VCM 70X2 second VCM 70Y1 third VCM 70Y2 fourth VCM 71X1, 71X2, 71Y1, 71Y2 coils 72X1a, 72X1b, 72X2a, 72X2b magnet 80 biasing mechanism 81 magnet 82 magnetic member 100 digital camera 200 image blur correction device

Claims

1. an imaging element having an imaging surface on which a plurality of pixels are arranged; a first support member that supports the imaging element; a second support member that movably supports the first support member; a drive unit that drives the first support member relative to the second support member; Equipped with the drive unit includes a first drive unit that drives the first support member in a first direction within the imaging surface, and two second drive units that drive the first support member in a second direction within the imaging surface that is perpendicular to the first direction, the first driving unit includes a coil wound in a substantially rectangular shape and a magnet, When the imaging element is viewed from a third direction orthogonal to the imaging surface, one of two long sides of the coil overlaps with the imaging element. Image stabilization device.

2. When the imaging element is viewed from the third direction, both of the two long sides of the coil overlap with the imaging element. The image blur correction device according to claim 1 .

3. Two first drive units are provided, the two first driving units are arranged on both sides of a line that passes through a center of the imaging element and extends in the second direction, 3. The image blur correction device according to claim 1.

4. the first driving unit includes a first magnet and a second magnet that are arranged side by side in order from a center of the imaging element toward an outer side in the first direction when the imaging element is viewed from the third direction, the polarity of a surface of the first magnet of one of the two first driving units facing the coil is the same as the polarity of a surface of the first magnet of the other of the two first driving units facing the coil; The image blur correction device according to claim 3 .

5. a biasing mechanism that biases the first support member toward the second support member in the third direction; the biasing mechanism includes a third magnet and a magnetic member that is magnetically attracted to the third magnet, the third magnet is disposed between the first magnets of the two first driving units in the first direction; 5. The image blur correction device according to claim 4.

6. each of the two second driving units includes a coil wound in a substantially rectangular shape and a magnet; When the imaging element is viewed from the third direction, at least one of two long sides of the coil of at least one of the two second driving units overlaps with the imaging element.

3. The image blur correction device according to claim 1.

7. a heat dissipation member that dissipates heat generated in the imaging element, the heat dissipation member is disposed between the imaging element and the first support member so that at least a portion of the heat dissipation member faces the imaging element; 3. The image blur correction device according to claim 1.

8. a first yoke member disposed between the imaging element and the first support member; The heat dissipation member and the first yoke member are connected to each other.

8. The image blur correction device according to claim 7.

9. a second yoke member fixed to a surface of the second support member opposite to a surface facing the first support member; the second yoke member has a notch for accommodating a connector for connecting a flexible printed circuit board; 3. The image blur correction device according to claim 1.

10. An imaging device comprising the image blur correction device according to claim 1 or 2.