Optical unit with shake correction function

Abstract

To provide an optical unit with a shake correction function, in which a shape of a camera module is simplified and a planar shape of the camera module is made smaller, while a product height of the optical unit with a shake correction function in an optical axis direction is reduced.SOLUTION: An optical unit 1 with a shake correction function includes: a camera module 4; a swingably supporting mechanism 7 swingably supporting the camera module 4 around a first axis X crossing an optical axis L of the camera module 4 and swingably supporting a movable body 5 around a second axis Y crossing the optical axis L and the first axis X; and a fixing body 8 supporting the camera module 4 via the swingably supporting mechanism 7. The camera module 4 includes: a lens holder 10; a case 12 surrounding an outer peripheral side of the lens holder 10; a substrate 15 fixed to an end portion on an opposite subject side L2 of the optical axis direction in the case 12; and an image sensor 3 disposed on the substrate 15. The case 12 and the substrate 15 are circular when viewed from the optical axis direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an optical unit with a shake correction function that corrects shake by swinging a camera module. [Background technology]

[0002] Among optical units mounted on mobile terminals or mobile objects, there are those that swing a movable body equipped with a camera module around an optical axis or around an axis that intersects with the optical axis in order to suppress distortion of captured images when the mobile terminal or mobile object is moving. Patent Document 1 discloses this type of optical unit with a shake correction function.

[0003] The optical unit with shake correction function of Patent Document 1 has a movable body with an imaging unit (camera module), a fixed body, and a shake correction drive mechanism that swings the movable body relative to the fixed body around an axis intersecting the optical axis. The imaging unit has a square case, a lens holder held inside the square case, a lens drive mechanism that moves the lens holder in the optical axis direction, an element holder fixed to the rear end of the square case in the optical axis direction, and an imaging element held by the element holder. When electricity is applied to the coil of the shake correction drive mechanism, the movable body swings around a swing fulcrum part provided on the rear side of the movable body in the optical axis direction, thereby performing shake correction of the imaging unit.

[0004] In Patent Document 1, since the imaging unit is rectangular when viewed from the optical axis direction, when the movable body swings, the corner farthest from the swing fulcrum in the radial direction is largely displaced in the optical axis direction. Therefore, in order to prevent the displacement of the movable body in the optical axis direction from becoming large, a recess that is recessed in the optical axis direction is formed in the corner of the rectangular case. In this way, when the corner of the imaging unit is recessed, the displacement of the movable body in the optical axis direction is reduced by the step of the recess. Therefore, the product height in the optical axis direction of the optical unit with shake correction function can be reduced. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-130822 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, if only the portion of the imaging unit that experiences a large displacement in the optical axis direction is recessed as in Patent Document 1, the external shape of the imaging unit becomes complicated, and the shapes of the components become complicated, which results in an increase in manufacturing costs.

[0007] Furthermore, in the imaging unit of Patent Document 1, the planar shape of the lens holder is circular, but the planar shape of the square case is rectangular, so the area of ​​the element holder is large, which results in large component sizes and high material costs.

[0008] In view of the above, an object of the present invention is to reduce the product height in the optical axis direction of an optical unit with shake correction function, simplify the shape of a camera module, and reduce the planar shape of the camera module. [Means for solving the problem]

[0009] In order to solve the above problems, the optical unit with shake correction function of the present invention includes a camera module and a first axis that intersects with an optical axis of the camera module. The camera module has a swing support mechanism that swingably supports the camera module and swings around a second axis that intersects the optical axis and the first axis, and a fixed body that supports the camera module via the swing support mechanism, wherein the camera module comprises a lens holder, a case that surrounds the outer periphery of the lens holder, a substrate fixed to an end of the case on the opposite subject side in the optical axis direction, and an image sensor disposed on the substrate, and the case and the substrate are circular when viewed in the optical axis direction.

[0010] According to the present invention, the outer shape of the camera module is circular when viewed from the optical axis direction. Therefore, the camera module does not have any corners that cause a large amount of displacement in the optical axis direction when rotated around an axis intersecting the optical axis. Therefore, the amount of displacement of the camera module in the optical axis direction when the camera module is swung to perform shake correction is small, so that the product height in the optical axis direction of the optical unit with shake correction function can be reduced.

[0011] Also, according to the present invention, the case, which is an exterior part of the camera module, can have a simple cylindrical shape and does not need to have a complex concave-convex shape. Therefore, the part shape can be simplified, and manufacturing costs can be reduced. Furthermore, by eliminating the corners of the camera module, the area of ​​the substrate can be reduced. Therefore, the material cost of the substrate can be reduced. Furthermore, since the planar shape of the camera module can be made smaller by the amount of the absence of corners, it is easy to ensure space for arranging parts such as a swing support mechanism on the outer periphery of the camera module. Therefore, the planar shape of the optical unit with shake correction function can be made smaller.

[0012] In the present invention, it is preferable that the camera module includes a cylindrical sleeve that holds the lens holder therein, a lens driving mechanism that is disposed in a radial gap between the sleeve and the case, and a lens support mechanism that supports the sleeve so as to be movable in the optical axis direction relative to the case. In this way, the camera module can have an autofocus function.

[0013] In the present invention, the lens driving mechanism includes a lens driving magnet fixed to one of the sleeve and the case, and a lens driving coil fixed to the other of the sleeve and the case, and the lens driving magnet and the lens driving coil are annular members that completely surround the sleeve and are preferably aligned in the optical axis direction. In this way, the radial width of the lens driving mechanism can be made smaller than in a configuration in which the coil and the magnet are radially opposed to each other. Therefore, the planar shape of the camera module can be made smaller.

[0014] In the present invention, the lens support mechanism is preferably a pair of leaf springs that connect the sleeve and the case on both sides of the optical axis direction of the lens drive mechanism. By suspending both ends of the sleeve with leaf springs in this manner, the movement of the sleeve in the optical axis direction is stabilized. Furthermore, by using leaf springs, the arrangement space for the lens support mechanism can be reduced.

[0015] In the present invention, it is preferable that the imaging element is rectangular when viewed from the optical axis direction, and the diagonal dimension of the imaging element is smaller than the diameter of the substrate. In this way, a general-purpose imaging element can be used. Also, when the substrate is not housed inside the case but is fixed by abutting it against the case from the side opposite to the subject, it is possible to prevent the case from interfering with the imaging element.

[0016] In the present invention, the fixed body includes a housing that surrounds the outer periphery of the case and has a shake correction magnetic drive mechanism that rotates the camera module around the first axis and the second axis, and the shake correction magnetic drive mechanism and the swing support mechanism are connected to the case and the housing. In this way, the height of the housing in the optical axis direction only needs to be large enough to accommodate the camera module, so the product height in the optical axis direction of the optical unit with shake correction function can be reduced. Also, in the present invention, the planar shape of the camera module can be made small, making it easy to ensure space for arranging the shake correction magnetic drive mechanism and the swing support mechanism on the outer periphery of the camera module. Effect of the Invention

[0017] According to the present invention, the outer shape of the camera module is circular when viewed from the optical axis direction, and the camera module does not have any corners that cause a large amount of displacement in the optical axis direction when rotated around an axis intersecting the optical axis. Therefore, the amount of displacement of the camera module in the optical axis direction when the camera module is swung to perform shake correction is small, and the product height in the optical axis direction of the optical unit with shake correction function can be reduced.

[0018] Also, according to the present invention, the case, which is an exterior part of the camera module, can have a simple cylindrical shape and does not need to have a complex concave-convex shape. Therefore, the part shape can be simplified, and manufacturing costs can be reduced. Furthermore, by eliminating the corners of the camera module, the planar shape of the substrate can be made smaller. Therefore, the material cost of the substrate can be reduced. Furthermore, since the planar shape of the camera module can be made smaller by the amount of the elimination of the corners, it is easy to ensure space for arranging parts such as a swing support mechanism on the outer periphery of the camera module. Therefore, the planar shape of the optical unit with shake correction function can be made smaller. [Brief description of the drawings]

[0019] [Figure 1] 1 is a cross-sectional view of an optical unit with a shake correction function to which the present invention is applied. [Diagram 2] FIG. 2 is a perspective view of a camera module. [Diagram 3] FIG. 2 is an exploded perspective view of the camera module. [Figure 4] 2 is a plan view showing a schematic diagram of a shake correction magnetic drive mechanism, a housing, and a camera module. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an optical unit with a shake correction function to which the present invention is applied will be described with reference to the drawings.

[0021] (Overall composition) Fig. 1 is a cross-sectional view of an optical unit 1 with a shake correction function to which the present invention is applied. Fig. 2 is a perspective view of a camera module 4. Fig. 3 is an exploded perspective view of the camera module 4. Fig. 4 is a plan view diagrammatically showing a shake correction magnetic drive mechanism 6, a housing 9, and the camera module 4.

[0022] The optical unit 1 with shake correction function has a camera module 4 equipped with a lens 2 and an image sensor 3. The optical unit 1 with shake correction function is used in optical devices such as camera-equipped mobile phones and drive recorders, and in optical devices such as action cameras and wearable cameras mounted on moving objects such as helmets, bicycles, and radio-controlled helicopters. In such optical devices, if the optical device shakes during shooting, the captured image will be distorted. In order to prevent the captured image from being tilted, the optical unit 1 with shake correction function corrects the tilt of the camera module 4 based on the acceleration, angular velocity, amount of shake, etc. detected by a detection means such as a gyroscope.

[0023] The optical unit 1 with shake correction function performs shake correction by rotating the camera module 4 around a first axis X perpendicular to the optical axis L of the lens 2, and rotating the camera module 4 around a second axis Y perpendicular to the optical axis L and the first axis X. In the following description, the direction along the optical axis L is referred to as the The direction is the optical axis direction, the direction along the first axis X is the first axis X direction, and the direction along the second axis Y is the second axis Y direction. One side in the optical axis direction is the L1 direction, and the other side in the optical axis direction is the L2 direction. The L1 direction is the subject side of the camera module 4, and the L2 direction is the opposite subject side of the camera module 4.

[0024] As shown in Fig. 1, optical unit 1 with shake correction function includes movable body 5 having a camera module 4, a magnetic drive mechanism 6 for shake correction, a swing support mechanism 7, and a fixed body 8 that supports movable body 5 via the swing support mechanism 7. The swing support mechanism 7 supports movable body 5 so that it can swing about a first axis X and a second axis Y. Movable body 5 is rotatable in a pitching direction about the first axis X and in a yawing direction about the second axis Y. Optical unit 1 with shake correction function performs pitching correction and yawing correction.

[0025] The optical unit 1 with shake correction function also includes a flexible printed circuit board (not shown) for outputting signals from the imaging element 3, and a flexible printed circuit board (not shown) for supplying power to the magnetic drive mechanism 6 for shake correction.

[0026] (fixed body) As shown in Figs. 1 and 4, the fixed body 8 includes a housing 9 surrounding the outer periphery of the movable body 5. In this embodiment, the housing 9 includes a first side wall 91 and a second side wall 92 extending parallel to the first axis X direction on both sides of the movable body 5 in the second axis Y direction, and a third side wall 93 and a fourth side wall 94 extending parallel to the second axis Y direction on both sides of the movable body 5 in the first axis X direction. The housing 9 also includes a bottom plate portion 95 closing the end of the rectangular cylindrical portion on the side opposite to the subject L2 formed by the first side wall 91, the second side wall 92, the third side wall 93, and the fourth side wall 94, and a front plate portion 96 extending from the end of the first side wall 91, the second side wall 92, the third side wall 93, and the fourth side wall 94 on the side opposite to the subject L1 toward the inner periphery. The movable body 5 includes a lens holder 10 that protrudes from an opening 97 formed in the center of a front plate portion 96 toward the subject side L1.

[0027] In this embodiment, the planar shape of the housing 9 as viewed from the optical axis direction is rectangular, but the planar shape of the housing 9 as viewed from the optical axis direction is not limited to a rectangle. For example, it may be an octagon or a circle.

[0028] (Shake correction magnetic drive mechanism) 4, the shake correction magnetic driving mechanism 6 is disposed between the movable body 5 and the first side wall 91, the second side wall 92, the third side wall 93, and the fourth side wall 94. The shake correction magnetic driving mechanism 6 includes a first shake correction magnetic driving mechanism 6X that generates a driving force about the first axis X for the movable body 5, and a second shake correction magnetic driving mechanism 6Y that generates a driving force about the second axis Y for the movable body 5.

[0029] In this embodiment, the first shake correction magnetic drive mechanism 6X is arranged on both sides of the movable body 5 in the second axis Y direction. The second shake correction magnetic drive mechanism 6Y is arranged on both sides of the movable body 5 in the first axis X direction. The first shake correction magnetic drive mechanism 6X includes a magnet 61X fixed to the movable body 5 and a coil 62X arranged on the first side wall 91 and the second side wall 92 of the housing 9. The second shake correction magnetic drive mechanism 6Y includes a magnet 61Y fixed to the movable body 5 and a coil 62Y arranged on the third side wall 93 and the fourth side wall 94 of the housing 9.

[0030] The first shake correction magnetic drive mechanism 6X may be disposed only on one side of the movable body 5 in the second axis Y direction. The second shake correction magnetic drive mechanism 6Y may be disposed only on one side of the movable body 5 in the first axis X direction. Furthermore, the first shake correction magnetic drive mechanism 6X and the second shake correction magnetic drive mechanism 6Y may have the coil and magnet arrangement reversed from that of this embodiment. In other words, the configuration includes a coil disposed in the movable body 5 and a magnet disposed in the fixed body 8. It is also possible.

[0031] (Swing support mechanism) As shown in FIG. 1, the swing support mechanism 7 has a structure in which the movable body 5 is suspended by a pair of leaf springs 71, 72 that connect the movable body 5 and the housing 9. The swing support mechanism 7 includes a leaf spring 71 that is connected to an end of the movable body 5 on the subject side L1, and a leaf spring 72 that is connected to an end of the movable body 5 on the opposite side L2 to the subject side. In this embodiment, the pair of leaf springs 71, 72 have the same shape and are arranged on both sides in the optical axis direction of the shake correction magnetic drive mechanism 6. Each of the leaf springs 71, 72 includes a movable body side connecting portion 73 that is fixed to the outer circumferential surface of the movable body 5, a fixed body side connecting portion 74 that is connected to the inner circumferential surface of the housing 9, and a plurality of arm portions 75 that connect the movable body side connecting portion 73 and the fixed body side connecting portion 74. Each arm portion 75 extends in the circumferential direction and has a shape that can bend in the radial direction. The plurality of arm portions 75 are evenly arranged in the circumferential direction with the optical axis L as the center.

[0032] The swing support mechanism 7 is not limited to the configuration of this embodiment. For example, the swing support mechanism 7 may be a gimbal mechanism or a pivot mechanism.

[0033] (Camera module) 1, 2 and 3, the camera module 4 includes a lens holder 10, a cylindrical sleeve 11 that holds the lens holder 10 therein, a case 12 that surrounds the outer periphery of the sleeve 11, a lens drive mechanism 13 and a lens support mechanism 14 that are disposed between the case 12 and the sleeve 11, and a substrate 15 that is fixed to an end of the case 12 on the side L2 opposite to the subject. The lens 2 is held by the lens holder 10. As shown in FIGS. 2 and 3, the lens holder 10 includes an opening 16 at an end on the side L1 opposite to the subject.

[0034] The case 12 includes a cylindrical tube portion 17 and an end plate portion 18 extending inward from the end portion on the subject side L1 of the tube portion 17. A circular opening 19 is provided in the center of the end plate portion 18. The tip portion of the lens holder 10 protrudes from the opening 19 towards the subject side L1.

[0035] The imaging element 3 is fixed to the substrate 15. As shown in FIG. 3, the imaging element 3 has a rectangular planar shape when viewed from the optical axis direction, and the substrate 15 has a circular planar shape when viewed from the optical axis direction. The diagonal dimension of the imaging element is smaller than the diameter of the substrate 15. In this embodiment, the end of the case 12 on the opposite subject side L2 abuts against the outer peripheral end of the substrate 15. The diagonal dimension of the imaging element 3 is smaller than the inner diameter of the tube portion 17 that abuts against the substrate 15. Therefore, the case 12 does not interfere with the imaging element 3.

[0036] 1 and 3, the lens driving mechanism 13 includes a lens driving magnet 20 fixed to the outer circumferential surface of the sleeve 11, and a pair of lens driving coils 21, 22 arranged on either side of the lens driving magnet 20 in the optical axis direction. The lens driving magnet 20 and the lens driving coils 21, 22 are both annular members that completely surround the sleeve 11. The lens driving coils 21, 22 are fixed to the inner circumferential surface of the tube portion 17, and are wound in the same direction.

[0037] The lens support mechanism 14 has a structure in which the sleeve 11 is suspended by a pair of leaf springs 23, 24 that connect the sleeve 11 and the case 12. The lens support mechanism 14 includes a leaf spring 23 connected to an end of the sleeve 11 on the subject side L1, and a leaf spring 24 connected to an end of the sleeve 11 on the anti-subject side L2. In this embodiment, the pair of leaf springs 23, 24 have the same shape and are disposed on both sides of the lens drive mechanism 13 in the optical axis direction.

[0038] Each of the leaf springs 23 and 24 includes a sleeve-side connecting portion 25 fixed to the outer circumferential surface of the sleeve 11, a case-side connecting portion 26 connected to the inner circumferential surface of the case 12, and a plurality of arms 27 connecting the sleeve-side connecting portion 25 and the case-side connecting portion 26. As shown in FIG. The sleeve-side connector 25 and the case-side connector 26 are annular. As shown in Fig. 1, annular spacers 28 are disposed between the end plate 18 of the case 12 and the sleeve-side connector 25, and between the lens driving coil 21 and the sleeve-side connector 25.

[0039] Each arm portion 27 extends in the circumferential direction and is shaped to be flexible in the optical axis direction. The multiple arm portions 27 are evenly arranged in the circumferential direction about the optical axis L. In this embodiment, the sleeve side connecting portion 25 and the case side connecting portion 26 are connected by three arm portions 27.

[0040] (Main effects of this embodiment) As described above, the optical unit 1 with shake correction function of this embodiment includes the camera module 4, the swing support mechanism 7 that supports the camera module 4 swingably about the first axis X intersecting with the optical axis L and that supports the camera module 4 swingably about the second axis Y intersecting with the optical axis L and the first axis X, and the fixed body 8 that supports the camera module 4 via the swing support mechanism 7. The camera module 4 includes the lens holder 10, the case 12 that surrounds the outer periphery of the lens holder 10, the substrate 15 that is fixed to the end of the case 12 on the opposite subject side L2 in the optical axis direction, and the image sensor 3 that is disposed on the substrate 15. The case 12 and the substrate 15 are circular when viewed in the optical axis direction.

[0041] According to this embodiment, the outer shape of the camera module 4 is circular when viewed from the optical axis direction. Therefore, the camera module 4 does not have any corners that are subject to a large amount of displacement in the optical axis direction when rotated about an axis intersecting the optical axis L. Therefore, the amount of displacement of the camera module 4 in the optical axis direction when the camera module 4 is swung to perform shake correction is small, so that the product height of the optical unit 1 with shake correction function in the optical axis direction can be reduced.

[0042] Also, according to this embodiment, the case 12, which is an exterior part of the camera module 4, can have a simple cylindrical shape and does not need to have a complex concave-convex shape. Therefore, the part shape can be simplified, and the manufacturing cost can be reduced. Furthermore, by eliminating the corners of the camera module 4, the area of ​​the substrate 15 can be reduced. Therefore, the material cost of the substrate 15 can be reduced, and the product cost of the camera module 4 can be reduced. In addition, since the planar shape of the camera module 4 can be reduced by the amount of the absence of corners, it is easy to ensure space for arranging parts such as the swing support mechanism 7 on the outer periphery of the camera module 4. Therefore, the planar shape of the optical unit 1 with shake correction function can be reduced.

[0043] In this embodiment, the camera module 4 includes a cylindrical sleeve 11 that holds the lens holder 10 therein, a lens driving mechanism 13 that is disposed in a radial gap between the sleeve 11 and a case 12, and a lens support mechanism 14 that supports the sleeve 11 movably in the optical axis direction relative to the case 12. Therefore, the camera module 4 can have an autofocus function.

[0044] In this embodiment, the lens driving mechanism 13 includes a lens driving magnet 20 fixed to the sleeve 11, and lens driving coils 21, 22 fixed to the inner peripheral surface of the case 12. The lens driving magnet 20 and the lens driving coils 21, 22 are annular members that completely surround the sleeve 11, and are aligned in the optical axis direction. In this configuration, the radial width of the lens driving mechanism 13 can be made smaller than in a configuration in which the coil and the magnet face each other in the radial direction. Therefore, the planar shape of the camera module 4 can be made smaller.

[0045] The lens driving mechanism 13 is not limited to the above configuration. For example, the lens driving coils 21 and 22 may be fixed, and the lens driving magnet 20 may be fixed to the inner peripheral surface of the case 12. In addition, although the above configuration includes two lens driving coils 21 and 22, the number of lens driving coils may be one. Also, the lens driving mechanism 13 may include a coil and a magnet. A configuration in which the stones face each other in the radial direction may be adopted.

[0046] In this embodiment, the lens support mechanism 14 is a pair of leaf springs 23, 24 that connect the sleeve 11 and the case 12 on both sides in the optical axis direction of the lens drive mechanism 13. In this way, by using a structure in which both ends of the sleeve 11 are suspended by the leaf springs 23, 24, the movement of the sleeve 11 in the optical axis direction is stabilized. In addition, by using the leaf springs 23, 24, the arrangement space for the lens support mechanism 14 can be reduced.

[0047] In this embodiment, the imaging element 3 is rectangular when viewed from the optical axis direction, and the diagonal dimension of the imaging element 3 is smaller than the diameter of the substrate 15. Therefore, a general-purpose imaging element 3 can be used. Also, when the substrate 15 is not housed inside the case 12 but is fixed by abutting it against the case 12 from the opposite subject side L2, it is possible to prevent the case 12 from interfering with the imaging element 3.

[0048] In this embodiment, the fixed body 8 includes a housing 9 surrounding the outer periphery of the case 12, and has a shake correction magnetic drive mechanism 6 that rotates the camera module 4 about the first axis X and the second axis Y, and it is preferable that the shake correction magnetic drive mechanism 6 and the swing support mechanism 7 are disposed between the case 12 and the housing 9. In this way, the product height in the optical axis direction of the shake correction function-equipped optical unit 1 can be reduced. Also, in this embodiment, since the planar shape of the camera module 4 can be reduced, it is easy to ensure the arrangement space for the shake correction magnetic drive mechanism 6 and the swing support mechanism 7 on the outer periphery of the camera module 4. Therefore, the planar shape of the shake correction function-equipped optical unit 1 can be reduced.

[0049] (Other embodiments) The optical unit 1 with shake correction function of the above-mentioned form includes a camera module 4 with an autofocus function in which a lens driving mechanism 13 and a lens support mechanism 14 are arranged between the sleeve 11 and the case 12, but the camera module 4 does not necessarily have to include the lens driving mechanism 13 and the lens support mechanism 14. [Explanation of symbols]

[0050] REFERENCE SIGNS LIST 1...optical unit with shake correction function, 2...lens, 3...imaging element, 4...camera module, 5...movable body, 6...shake correction magnetic drive mechanism, 6X...first shake correction magnetic drive mechanism, 6Y...second shake correction magnetic drive mechanism, 7...swing support mechanism, 8...fixed body, 9...housing, 10...lens holder, 11...sleeve, 12...case, 13...lens drive mechanism, 14...lens support mechanism, 15...substrate, 16...opening, 17...tubular portion, 18...end plate portion, 19...opening, 20...lens drive magnet, 21, 22...lens drive coil, 23, 24...leaf spring, 25...sleeve side connecting portion, 26...case side connecting portion, 27...arm portion, 28...spacer, 61X, 61Y...magnet, 62X, 62Y ... Coil, 71, 72... Leaf spring, 73... Movable body side connection part, 74... Fixed body side connection part, 75... Arm part, 91... First side wall, 92... Second side wall, 93... Third 3 side wall, 94...Fourth side wall, 95...Bottom plate part, 96...Front plate part, 97...Opening part, L...Optical axis, L1...Subject side, L2...Non-subject side, X...1st axis, Y...2nd axis

Claims

1. A camera module; a swing support mechanism that supports the camera module swingably about a first axis that intersects with an optical axis of the camera module and that supports the camera module swingably about a second axis that intersects with the optical axis and the first axis; a fixed body that supports the camera module via the swing support mechanism, the camera module includes a lens holder, a case surrounding an outer periphery of the lens holder, a substrate fixed to an end of the case on an opposite subject side in the optical axis direction, and an image sensor disposed on the substrate; the case is an exterior case of the camera module, The optical unit with shake correction function, wherein the case and the substrate are circular when viewed from the optical axis direction.

2. The optical unit with shake correction function described in claim 1, characterized in that the camera module comprises a cylindrical sleeve that holds the lens holder inside, a lens driving mechanism arranged in a radial gap between the sleeve and the case, and a lens support mechanism that supports the sleeve movably in the optical axis direction relative to the case.

3. the lens driving mechanism includes a lens driving magnet fixed to one of the sleeve and the case, and a lens driving coil fixed to the other of the sleeve and the case, 3. The optical unit with shake correction function according to claim 2, wherein the lens driving magnet and the lens driving coil are annular members that completely surround the sleeve, and are aligned in the optical axis direction.

4. 4. The optical unit with shake correction function according to claim 2, wherein the lens support mechanism is a pair of leaf springs connecting the sleeve and the case on both sides of the lens drive mechanism in the optical axis direction.

5. the imaging element is rectangular when viewed from the optical axis direction, 5. The optical unit with shake correction function according to claim 1, wherein a diagonal dimension of the imaging element is smaller than a diameter of the substrate.

6. the fixed body includes a housing surrounding an outer periphery of the case, a shake correction magnetic drive mechanism that rotates the camera module around the first axis and the second axis; 6. The optical unit with shake correction function according to claim 1, wherein the shake correction magnetic drive mechanism and the swing support mechanism are disposed between the case and the housing.

Images