Optical unit with image stabilization function

Abstract

To provide a tremor correction function-incorporated optical unit that can suppress fall of a degree of freedom in a design such as a mobile instrument to which a tremor correction function-incorporated optical unit is incorporated and the like further than conventional optical units in the tremor correction function-incorporated optical unit comprising a movable body having a camera module, a first magnetic driving mechanism and second magnetic driving mechanism for revolving the movable body so that an optical axis of the camera module tilts in an arbitrary direction, and a third magnetic driving mechanism for revolving the movable body with the optical axis of the camera module as a revolving center.SOLUTION: In a tremor correction function-incorporated optical unit 1, a third magnetic driving mechanism 7, a first magnetic mechanism 8 and a second magnetic mechanism 9 are arranged along two sides of an intermediate member holding part 21a in which an outer shape when viewing from an optical axis direction of a camera module 2 at a time of a movable body 3 being arranged in a reference position is formed into a square shape.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an optical unit with a shake correction function mounted on a mobile device or the like.

Background Art

[0002] Conventionally, an optical unit with a shake correction function mounted on a mobile device or the like has been known (see, for example, Patent Document 1). The optical unit with a shake correction function described in Patent Document 1 includes an optical unit main body housed in a cover. The optical unit main body includes an imaging module having a lens and an imaging element. Further, the optical unit main body includes a movable body having the imaging module, a rotation support mechanism that supports the movable body so that rotation around the optical axis of the lens is possible, a gimbal mechanism that supports the rotation support mechanism so that rotation around a first axis orthogonal to the optical axis and rotation around a second axis orthogonal to the optical axis and the first axis are possible, and a fixed body that supports the movable body via the gimbal mechanism and the rotation support mechanism.

[0003] In the optical unit with a shake correction function described in Patent Document 1, the movable body is supported by the fixed body so that rotation around the optical axis, rotation around the first axis, and rotation around the second axis are possible. The optical unit main body includes a first shake correction magnetic drive mechanism that generates a driving force around an X axis that is inclined by 45° around the optical axis with respect to the first axis and the second axis in the movable body, a second shake correction magnetic drive mechanism that generates a driving force around a Y axis orthogonal to the optical axis and the X axis in the movable body, and a rolling correction magnetic drive mechanism that rotates the movable body around the optical axis.

[0004] In the optical unit with shake correction function described in Patent Document 1, the external shape of the fixed body when viewed from the optical axis direction is square. Specifically, the external shape of the fixed body when viewed from the optical axis direction is square, having two sides parallel to the X axis direction and two sides parallel to the Y axis direction. In this optical unit with shake correction function, the first shake correction magnetic drive mechanism is arranged along one of the two sides of the fixed body parallel to the X axis direction, the rolling correction magnetic drive mechanism is arranged along the other side of the fixed body parallel to the X axis direction, and the second shake correction magnetic drive mechanism is arranged along one of the two sides of the fixed body parallel to the Y axis direction. In other words, in this optical unit with shake correction function, the first shake correction magnetic drive mechanism, the second shake correction magnetic drive mechanism, and the rolling correction magnetic drive mechanism are arranged along three sides of the fixed body, which has a square external shape when viewed from the optical axis direction. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2021-28655 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] In the optical unit with shake correction function described in Patent Document 1, the first shake correction magnetic drive mechanism, the second shake correction magnetic drive mechanism, and the rolling correction magnetic drive mechanism are arranged along the three sides of the fixed body, and there is a risk of magnetic leakage in the regions along each of the three sides of the fixed body. Therefore, in portable devices and the like that which are equipped with this optical unit with shake correction function, it becomes necessary to arrange various components in a way that does not cause magnetic interference in the regions along each of the three sides of the fixed body, which may reduce the design flexibility of the device.

[0007] Therefore, the object of the present invention is to provide an optical unit with shake correction function that includes a movable body having a camera module, a first magnetic drive mechanism and a second magnetic drive mechanism for rotating the movable body so that the optical axis of the camera module is tilted in any direction, and a third magnetic drive mechanism for rotating the movable body with the optical axis of the camera module as the pivot point, and which can suppress the reduction in design freedom of portable devices and the like on which the optical unit with shake correction function is mounted more than conventional optical units. [Means for solving the problem]

[0008] To solve the above problems, the optical unit with shake correction function of the present invention comprises a movable body having a camera module, a first intermediate member that rotatably holds the movable body, a second intermediate member that rotatably holds the first intermediate member, a fixed body that rotatably holds the second intermediate member, a first magnetic drive mechanism and a second magnetic drive mechanism for rotating the movable body relative to the fixed body so that the optical axis of the camera module is tilted in any direction, a third magnetic drive mechanism for rotating the movable body relative to the fixed body with the optical axis of the camera module as the pivot point, and the rotation position of the movable body relative to the fixed body The first magnetic drive mechanism comprises a first magnetic sensor and a second magnetic sensor for detection, and a flat first magnetic plate and a second magnetic plate for biasing the movable body toward a reference position, which is the position of the movable body when the optical axis of the camera module is oriented in a predetermined reference direction. When the movable body is positioned in the reference position, a predetermined direction perpendicular to the optical axis of the camera module is defined as the first optical axis orthogonal direction, and when the movable body is positioned in the reference position, a direction perpendicular to both the optical axis of the camera module and the first optical axis orthogonal direction is defined as the second optical axis orthogonal direction. The first magnetic drive mechanism is positioned opposite in the first optical axis orthogonal direction. The first magnetic drive mechanism comprises a first drive magnet and a first drive coil arranged opposite each other in the direction perpendicular to the second optical axis, and rotates the movable body relative to the fixed body with a second rotation axis parallel to the direction perpendicular to the second optical axis as the rotation center. The second magnetic drive mechanism comprises a second drive magnet and a second drive coil arranged opposite each other in the direction perpendicular to the second optical axis, and rotates the movable body relative to the fixed body with a first rotation axis parallel to the direction perpendicular to the first optical axis as the rotation center. The third magnetic drive mechanism comprises a third drive magnet and a third drive coil arranged opposite each other in the direction perpendicular to the first optical axis, and a fourth drive magnet and a fourth drive coil arranged opposite each other in the direction perpendicular to the second optical axis. The first magnetic sensor and first magnetic plate are positioned opposite the first drive magnet in a direction perpendicular to the first optical axis, the second magnetic sensor and second magnetic plate are positioned opposite the second drive magnet in a direction perpendicular to the second optical axis, the fixed body includes an intermediate member holder that rotatably holds the second intermediate member, and when the movable body is positioned in a reference position, the outer shape of the intermediate member holder when viewed from the optical axis direction, which is the direction of the optical axis of the camera module, is square or rectangular, and the first magnetic drive mechanism, the first magnetic sensor, the first magnetic plate, the third drive magnet, and the third drive coil are,The intermediate member holder, whose outer shape is square or rectangular when viewed from the optical axis direction when the movable body is positioned in the reference position, is arranged along one side of the intermediate member holder that is parallel to the direction perpendicular to the second optical axis, the second magnetic drive mechanism, the second magnetic sensor, the second magnetic plate, the fourth drive magnet, and the fourth drive coil are arranged along one side of the intermediate member holder that is parallel to the direction perpendicular to the first optical axis, a part of the first drive magnet and a part of the first drive coil are arranged on the first rotation axis, the third drive magnet and the third drive coil are arranged on one side of the first magnetic drive mechanism in the direction perpendicular to the second optical axis, and the first drive magnet The center and the center of the first drive coil are positioned offset from the first rotation axis to the other side perpendicular to the second optical axis; the center of the first magnetic sensor and the center of the first magnetic plate are positioned on the first rotation axis; a portion of the second drive magnet and a portion of the second drive coil are positioned on the second rotation axis; the fourth drive magnet and the fourth drive coil are positioned on one side of the second magnetic drive mechanism perpendicular to the first optical axis; the center of the second drive magnet and the center of the second drive coil are positioned offset from the second rotation axis to the other side perpendicular to the first optical axis; and the center of the second magnetic sensor and the center of the second magnetic plate are positioned on the second rotation axis.

[0009] In the optical unit with shake correction function of the present invention, the first magnetic drive mechanism, the third drive magnet, and the third drive coil are arranged along one side of the intermediate member holder that is parallel to the direction perpendicular to the second optical axis, out of the four sides of the intermediate member holder that has a square or rectangular shape when viewed from the optical axis direction when the movable body is positioned in a reference position, and the second magnetic drive mechanism, the fourth drive magnet, and the fourth drive coil are arranged along one side of the intermediate member holder that is parallel to the direction perpendicular to the first optical axis, out of the four sides of the intermediate member holder.

[0010] In other words, in the present invention, the first magnetic drive mechanism, the second magnetic drive mechanism, and the third magnetic drive mechanism are arranged along two sides of the intermediate member holding portion, which has a square or rectangular shape when viewed from the optical axis direction when the movable body is positioned at a reference position. Therefore, in portable devices and the like equipped with the optical unit with shake correction function of the present invention, various components can be arranged so that magnetic interference does not occur in the region along each of the two sides of the intermediate member holding portion. Consequently, the present invention makes it possible to suppress the reduction in design freedom of portable devices and the like equipped with the optical unit with shake correction function more than in the conventional invention.

[0011] Furthermore, for example, if the third drive magnet, third drive coil, fourth drive magnet, and fourth drive coil are arranged along one side of the intermediate member holder parallel to the direction perpendicular to the second optical axis, the first drive magnet and first drive coil arranged along one side of the intermediate member holder parallel to the direction perpendicular to the second optical axis will be smaller than the second drive magnet and second drive coil arranged along one side of the intermediate member holder parallel to the direction perpendicular to the first optical axis, which may result in a large difference between the driving force of the first magnetic drive mechanism and the driving force of the second magnetic drive mechanism.

[0012] In contrast, in the present invention, the third drive magnet and the third drive coil are arranged along one side of the intermediate member holder parallel to the direction perpendicular to the second optical axis, and the fourth drive magnet and the fourth drive coil are arranged along one side of the intermediate member holder parallel to the direction perpendicular to the first optical axis. Therefore, it is possible to suppress the difference in size between the first drive magnet and the second drive magnet, and the difference in size between the first drive coil and the second drive coil. Consequently, in the present invention, it is possible to suppress the difference in driving force between the first magnetic drive mechanism and the second magnetic drive mechanism.

[0013] Furthermore, in the present invention, a portion of the first drive magnet and a portion of the first drive coil are arranged on the first rotation axis, and the third drive magnet and the third drive coil are arranged on one side of the first magnetic drive mechanism in the direction perpendicular to the second optical axis. In addition, the centers of the first drive magnet and the first drive coil are positioned offset from the first rotation axis to the other side in the direction perpendicular to the second optical axis. Therefore, compared to the case where the centers of the first drive magnet and the first drive coil are arranged on the first rotation axis, it becomes possible to increase the size of the first drive magnet and the first drive coil in the direction perpendicular to the second optical axis. Consequently, in the present invention, it becomes possible to increase the driving force of the first magnetic drive mechanism.

[0014] Similarly, in the present invention, a portion of the second drive magnet and a portion of the second drive coil are arranged on the second rotation axis, and the fourth drive magnet and fourth drive coil are arranged on one side of the second magnetic drive mechanism in the direction perpendicular to the first optical axis. Furthermore, the centers of the second drive magnet and the second drive coil are positioned offset from the second rotation axis to the other side in the direction perpendicular to the first optical axis. Therefore, compared to the case where the centers of the second drive magnet and the second drive coil are arranged on the second rotation axis, it becomes possible to increase the size of the second drive magnet and the second drive coil in the direction perpendicular to the first optical axis. Consequently, in the present invention, it becomes possible to increase the driving force of the second magnetic drive mechanism.

[0015] Furthermore, in the present invention, since the center of the first magnetic sensor, which is positioned opposite the first driving magnet in a direction perpendicular to the first optical axis, is positioned on the first rotation axis, it becomes possible to suppress the amount of misalignment in the optical axis direction between the first driving magnet and the first magnetic sensor when the movable body is rotated relative to the fixed body with the first rotation axis as the rotation center. Therefore, in the present invention, it becomes possible to appropriately detect the rotational position of the movable body when the movable body is rotated relative to the fixed body with the second rotation axis as the rotation center, using the first driving magnet and the first magnetic sensor.

[0016] Similarly, in the present invention, since the center of the second magnetic sensor, which is positioned opposite the second driving magnet in a direction perpendicular to the second optical axis, is positioned on the second rotation axis, it becomes possible to suppress the amount of misalignment in the optical axis direction between the second driving magnet and the second magnetic sensor when the movable body is rotated relative to the fixed body with the second rotation axis as the rotation center. Therefore, in the present invention, it becomes possible to appropriately detect the rotational position of the movable body when the movable body is rotated relative to the fixed body with the first rotation axis as the rotation center, using the second driving magnet and the second magnetic sensor.

[0017] Furthermore, in the present invention, since the center of the first magnetic plate, which is positioned opposite the first driving magnet in a direction perpendicular to the first optical axis, is positioned on the first rotation axis, it becomes possible to suppress the amount of misalignment in the optical axis direction between the first driving magnet and the first magnetic plate when the movable body is rotated relative to the fixed body with the first rotation axis as the rotation center. Therefore, in the present invention, it becomes possible to reduce the influence of the magnetic attractive force generated between the first driving magnet and the first magnetic plate on the driving force of the second magnetic drive mechanism when the movable body is rotated relative to the fixed body with the first rotation axis as the rotation center.

[0018] Similarly, in the present invention, since the center of the second magnetic plate, which is positioned opposite the second driving magnet in a direction perpendicular to the second optical axis, is positioned on the second rotation axis, it becomes possible to suppress the amount of misalignment in the optical axis direction between the second driving magnet and the second magnetic plate when the movable body is rotated relative to the fixed body with the second rotation axis as the rotation center. Therefore, in the present invention, it becomes possible to reduce the influence of the magnetic attractive force generated between the second driving magnet and the second magnetic plate on the driving force of the first magnetic drive mechanism when the movable body is rotated relative to the fixed body with the second rotation axis as the rotation center.

[0019] In the present invention, if the side of the direction orthogonal to the first optical axis on which the first magnetic drive mechanism is positioned relative to the second magnetic drive mechanism is defined as the first direction, the side opposite to the first direction is defined as the second direction, the side of the direction orthogonal to the second optical axis on which the second magnetic drive mechanism is positioned relative to the first magnetic drive mechanism is defined as the third direction, and the side opposite to the third direction is defined as the fourth direction, then the third drive magnet and the third drive coil are positioned on the third direction side of the first magnetic drive mechanism, the fourth drive magnet and the fourth drive coil are positioned on the first direction side of the second magnetic drive mechanism, the centers of the first drive magnet and the first drive coil are offset from the first rotation axis toward the fourth direction, and the centers of the second drive magnet and the second drive coil are offset from the second rotation axis toward the second direction.

[0020] With this configuration, when the movable body rotates to one side around the optical axis of the camera module as the pivot point, it becomes possible to bring the third drive magnet and the third drive coil closer together while moving the fourth drive magnet and the fourth drive coil further apart. Conversely, when the movable body rotates to the other side around the optical axis of the camera module as the pivot point, it becomes possible to move the third drive magnet and the third drive coil further apart while moving the fourth drive magnet and the fourth drive coil closer together. Therefore, it becomes possible to suppress variations in the driving force of the third magnetic drive mechanism when the movable body rotates to one side around the optical axis of the camera module as the pivot point, and when the movable body rotates to the other side. As a result, it becomes possible to stabilize the rotational movement of the movable body when it rotates relative to the fixed body around the optical axis of the camera module as the pivot point.

[0021] In the present invention, the optical unit with shake correction function includes, for example, a third magnetic sensor positioned opposite a third drive magnet in a direction perpendicular to the first optical axis, a fourth magnetic sensor positioned opposite a fourth drive magnet in a direction perpendicular to the second optical axis, and a control unit to which the third magnetic sensor and the fourth magnetic sensor are electrically connected. The control unit detects the rotational position of the movable body relative to a fixed body with the optical axis of the camera module as the pivot point, based on the output signals of the third magnetic sensor and the fourth magnetic sensor.

[0022] When the third driving magnet is disposed on the third-direction side of the first magnetic driving mechanism and the fourth driving magnet is disposed on the first-direction side of the second magnetic driving mechanism, when the movable body rotates to one side with the optical axis of the camera module as the rotation center, the third driving magnet and the third magnetic sensor approach each other, and the fourth driving magnet and the fourth magnetic sensor move away from each other. On the other hand, when the movable body rotates to the other side with the optical axis of the camera module as the rotation center, the third driving magnet and the third magnetic sensor move away from each other, and the fourth driving magnet and the fourth magnetic sensor approach each other. Also, the distance between the third magnetic sensor and the third driving magnet affects the output signal of the third magnetic sensor, and the distance between the fourth magnetic sensor and the fourth driving magnet affects the output signal of the fourth magnetic sensor.

[0023] Therefore, when the third driving magnet is disposed on the third-direction side of the first magnetic driving mechanism and the fourth driving magnet is disposed on the first-direction side of the second magnetic driving mechanism, if the rotational position of the movable body with respect to the fixed body centered on the optical axis of the camera module is detected based only on the output signal of the third magnetic sensor or the output signal of the fourth magnetic sensor, the detection accuracy of the rotational position of the movable body with respect to the fixed body centered on the optical axis of the camera module may decrease. On the other hand, if the rotational position of the movable body with respect to the fixed body centered on the optical axis of the camera module is detected based on the output signals of the third magnetic sensor and the fourth magnetic sensor, it becomes possible to appropriately detect the rotational position of the movable body with respect to the fixed body centered on the optical axis of the camera module.

[0024] In the present invention, for example, the third driving magnet is composed of two magnetized portions polarized in the second direction orthogonal to the optical axis, the fourth driving magnet is composed of two magnetized portions polarized in the first direction orthogonal to the optical axis, and the magnet pole on the third-direction side of the third driving magnet and the magnet pole on the first-direction side of the fourth driving magnet are the same magnet pole.

Effects of the Invention

[0025] As described above, in the present invention, a mobile body having a camera module, a first magnetic drive mechanism and a second magnetic drive mechanism for rotating the mobile body so that the optical axis of the camera module is inclined in an arbitrary direction, and a third magnetic drive mechanism for rotating the mobile body about the optical axis of the camera module are provided. It becomes possible to suppress a decrease in the degree of freedom in the design of a mobile device or the like on which an optical unit with a shake correction function is mounted, more than in the prior art.

Brief Description of the Drawings

[0026] [Figure 1] It is a perspective view of an optical unit with a shake correction function according to an embodiment of the present invention. [Figure 2] It is a plan view of the optical unit with a shake correction function shown in FIG. 1. [Figure 3] It is an exploded perspective view of the optical unit with a shake correction function shown in FIG. 1. [Figure 4] It is an exploded perspective view of a second intermediate member and a second fulcrum portion shown in FIG. 3. [Figure 5] It is an exploded perspective view of a holder, a first intermediate member, a first fulcrum portion, etc. shown in FIG. 4. [Figure 6] It is a plan view showing the holder, the first magnetic drive mechanism, the second magnetic drive mechanism, the third magnetic drive mechanism, etc. shown in FIG. 2 extracted. [Figure 7] It is a rear view showing the holder, the first magnetic drive mechanism, the first magnetic sensor, the third magnetic sensor, the first magnetic plate, the third drive magnet, and the third drive coil from the E-E direction in FIG. 6. [Figure 8] It is a side view showing the second magnetic drive mechanism, the second magnetic sensor, the fourth magnetic sensor, the second magnetic plate, the fourth drive magnet, and the fourth drive coil from the F-F direction in FIG. 6. [Figure 9] It is a plan view for explaining the arrangement relationship between the third drive magnet, the fourth drive magnet, the third drive coil, the fourth drive coil, the third magnetic sensor, and the fourth magnetic sensor when the movable body shown in FIG. 2 rotates with respect to the fixed body about the optical axis of the camera module. [Figure 10]Figure 9 is a graph illustrating an example of the output signals of the third and fourth magnetic sensors. [Modes for carrying out the invention]

[0027] Embodiments of the present invention will be described below with reference to the drawings.

[0028] (Overall configuration of the optical unit with image stabilization function) Figure 1 is a perspective view of an optical unit 1 with shake correction function according to an embodiment of the present invention. Figure 2 is a plan view of the optical unit 1 with shake correction function shown in Figure 1. Figure 3 is an exploded perspective view of the optical unit 1 with shake correction function shown in Figure 1. Figure 4 is an exploded perspective view of the second intermediate member 5 and the second pivot point 13, etc., shown in Figure 3. Figure 5 is an exploded perspective view of the holder 16, the first intermediate member 4 and the first pivot point 12, etc., shown in Figure 4. Figure 6 is a plan view showing the holder 16 and magnetic drive mechanisms 7-9, etc., extracted from Figure 2.

[0029] In the following explanation, as shown in Figure 1, the three mutually orthogonal directions will be referred to as the X, Y, and Z directions, with the X direction being the left-right direction, the Y direction being the front-back direction, and the Z direction being the up-down direction. Furthermore, one side of the left-right direction, the X1 direction in Figure 1, will be referred to as the "right" side, and the opposite side, the X2 direction in Figure 1, will be referred to as the "left" side. One side of the front-back direction, the Y1 direction in Figure 1, will be referred to as the "front" side, and the opposite side, the Y2 direction in Figure 1, will be referred to as the "back" side. One side of the up-down direction, the Z1 direction in Figure 1, will be referred to as the "up" side, and the opposite side, the Z2 direction in Figure 1, will be referred to as the "down" side.

[0030] The optical unit 1 with shake correction function in this embodiment (hereinafter referred to as "optical unit 1") is a small and thin unit that can be mounted on portable devices such as smartphones, and includes a camera module 2 having a lens for shooting and an image sensor. The optical unit 1 is formed as a flat, roughly rectangular parallelepiped with a thin overall thickness. The optical unit 1 also has a shake correction function to avoid distortion of the captured image when shake occurs during shooting. Specifically, the optical unit 1 has shake correction functions in the pitching direction, yawing direction, and rolling direction.

[0031] The optical unit 1 comprises a movable body 3 having a camera module 2, a first intermediate member 4 that rotatably holds the movable body 3, a second intermediate member 5 that rotatably holds the first intermediate member 4, and a fixed body 6 that rotatably holds the second intermediate member 5. The movable body 3 is rotatable relative to the first intermediate member 4 with the optical axis L of the camera module 2 as the pivot point.

[0032] The first intermediate member 4 is rotatable relative to the second intermediate member 5 with a first direction (direction V in Figure 2) perpendicular to the optical axis L of the camera module 2 as its axis of rotation. That is, the first intermediate member 4 is rotatable relative to the second intermediate member 5 with a first axis L1 (see Figure 2) whose axis is the first direction as its axial direction. The second intermediate member 5 is rotatable relative to the fixed body 6 with a second direction (direction W in Figure 2) whose axis of rotation is perpendicular to the first direction and intersects the optical axis L of the camera module 2 as its axis of rotation. That is, the second intermediate member 5 is rotatable relative to the fixed body 6 with a second axis L2 (see Figure 2) whose axis is the second direction as its axial direction as its axis. In this way, a two-axis gimbal mechanism is configured between the movable body 3 and the fixed body 6.

[0033] In this embodiment, when no current is supplied to the drive coils 48 and 50 (described later), the optical axis L of the camera module 2 is oriented in a predetermined reference direction, and the position of the movable body 3 when the optical axis L of the camera module 2 is oriented in the reference direction is the reference position of the movable body 3. When the movable body 3 is positioned in the reference position, the optical axis direction, which is the direction of the optical axis L of the camera module 2, coincides with the vertical direction. Also, when the movable body 3 is positioned in the reference position, the first intermediate member 4 and the second intermediate member 5 are also positioned in predetermined reference positions.

[0034] In this embodiment, the front-to-back direction (Y direction) is the first optical axis orthogonal direction, which is a predetermined direction perpendicular to the optical axis L of the camera module 2 when the movable body 3 is positioned in the reference position. The left-to-right direction (X direction) is the second optical axis orthogonal direction, which is perpendicular to both the front-to-back direction (which is the first optical axis orthogonal direction) and the optical axis L of the camera module 2 when the movable body 3 is positioned in the reference position. Furthermore, the rear side (Y2 direction side) of this embodiment is the first direction side, which is one side of the first optical axis orthogonal direction. The front side (Y1 direction side) is the second direction side, which is the opposite side of the first direction side. The left side (X2 direction side) is the third direction side, which is one side of the second optical axis orthogonal direction. The right side (X1 direction side) is the fourth direction side, which is the opposite side of the third direction side.

[0035] Furthermore, when the movable body 3 is positioned at the reference position, the second direction is perpendicular to the optical axis L. Specifically, when the first intermediate member 4 is positioned at a predetermined reference position and is not rotating relative to the second intermediate member 5, the second direction is perpendicular to the optical axis L. On the other hand, when the first intermediate member 4 is rotating relative to the second intermediate member 5, the second direction intersects the optical axis L, but not at a right angle. When viewed from above, the first direction is shifted approximately 45° in the counterclockwise direction in Figure 2 relative to the front-rear direction.

[0036] The optical unit 1 includes a magnetic drive mechanism 7 for rotating the movable body 3 relative to the fixed body 6 with the optical axis L of the camera module 2 as the pivot point, and magnetic drive mechanisms 8 and 9 for rotating the movable body 3 relative to the fixed body 6 so that the optical axis L of the camera module 2 is tilted in any direction. In this embodiment, magnetic drive mechanism 8 is the first magnetic drive mechanism, magnetic drive mechanism 9 is the second magnetic drive mechanism, and magnetic drive mechanism 7 is the third magnetic drive mechanism.

[0037] At both ends of the first intermediate member 4 in the first direction, first pivot points 12 are provided, which serve as pivot points for the rotation of the first intermediate member 4 relative to the second intermediate member 5. At both ends of the second intermediate member 5 in the second direction, second pivot points 13 are provided, which serve as pivot points for the rotation of the second intermediate member 5 relative to the fixed body 6. Between the movable body 3 and the first intermediate member 4, a rotation support portion 14 is provided to enable the rotation of the movable body 3 relative to the first intermediate member 4.

[0038] The movable body 3 is formed as a flat rectangular parallelepiped with a thin thickness in the optical axis direction. The movable body 3 comprises a holder 16 to which the camera module 2 is fixed, and a rotating member 17 fixed to the holder 16. The holder 16 is made of a resin material. The holder 16 is formed in the shape of a square frame, and the outer shape of the holder 16 when viewed from the optical axis direction is square. The camera module 2 is fixed to the inner surface of the holder 16 such that the outer periphery of the camera module 2 is covered by the holder 16.

[0039] Furthermore, when the movable body 3 is positioned in the reference position, two of the four sides of the holder 16, which has a square outer shape, are parallel to the front-to-back direction, and the remaining two sides of the holder 16 are parallel to the left-to-right direction. In addition, both ends of the holder 16 in the first direction are chamfered and form a plane that is approximately perpendicular to the first direction. Similarly, both ends of the holder 16 in the second direction are chamfered and form a plane that is approximately perpendicular to the second direction.

[0040] As shown in Figure 6, the rear side of the holder 16 has a recess 16a where a drive magnet 43, which will be described later and constitute part of the magnetic drive mechanism 7, is positioned, and a recess 16b where a drive magnet 47, which will be described later and constitute part of the magnetic drive mechanism 8, is positioned. The left side of the holder 16 has a recess 16c where a drive magnet 45, which will be described later and constitute part of the magnetic drive mechanism 7, is positioned, and a recess 16d where a drive magnet 49, which will be described later and constitute part of the magnetic drive mechanism 9, is positioned.

[0041] The rotating member 17 is made of a metal material such as stainless steel. The rotating member 17 is also formed by bending a metal plate into a predetermined shape. The rotating member 17 includes a mounting portion 17a that rests on the rotating support portion 14, and a fixed portion 17b that is fixed to the holder 16. The mounting portion 17a is formed in an annular shape. Furthermore, the mounting portion 17a is formed in a substantially flat shape. The thickness direction of the mounting portion 17a coincides with the optical axis direction.

[0042] The mounting portion 17a is positioned above the holder 16. An annular groove (not shown) is formed on the lower surface of the mounting portion 17a, where a portion of the sphere 31, which will be described later and constitute part of the rotation support portion 14, is positioned. This groove is recessed upwards. This groove is also formed in an annular shape centered on the optical axis L of the camera module 2. The upper end of the camera module 2 is positioned on the inner circumference side of the mounting portion 17a.

[0043] The fixed portion 17b is connected to the outer circumferential surface of the mounting portion 17a. In this embodiment, the fixed portions 17b are connected to both sides in the front-rear, left-right, and right-hand directions of the outer circumferential surface of the mounting portion 17a, and four fixed portions 17b are arranged at 90° intervals around the optical axis L. The tip end of the fixed portion 17b is bent downwards. The tip end of the fixed portion 17b is fixed to the holder 16. In addition, a flat projection 17c is connected to the outer circumferential surface of the mounting portion 17a. The projection 17c protrudes from the mounting portion 17a on both sides in a second direction. The thickness direction of the projection 17c coincides with the optical axis direction.

[0044] As described above, the camera module 2 includes a lens and an image sensor. The image sensor is located at the lower end of the camera module 2, and subjects located above the camera module 2 are photographed by the camera module 2. A flexible printed circuit board 18 is pulled out from the lower end of the camera module 2. The flexible printed circuit board 18 is pulled out to the right from the camera module 2. In other words, the optical unit 1 includes a flexible printed circuit board 18 that is pulled out to the right from the movable body 3.

[0045] The first intermediate member 4 is made of a metal material such as stainless steel. The first intermediate member 4 is also formed by bending a metal plate into a predetermined shape. The first intermediate member 4 includes a mounting portion 4a on which the rotating support portion 14 is placed, and two arm portions 4b extending from the mounting portion 4a toward both sides in the first direction. The mounting portion 4a is formed in an annular shape. The mounting portion 4a is also formed in a substantially flat shape. The thickness direction of the mounting portion 4a coincides with the optical axis direction.

[0046] The mounting portion 4a is positioned above the holder 16. Furthermore, the mounting portion 4a is positioned below the mounting portion 17a of the rotating member 17. As shown in Figure 5, an annular groove 4c is formed on the upper surface of the mounting portion 4a, where a portion of the sphere 31 (described later), which constitutes part of the rotating support portion 14, is positioned. The groove 4c is recessed downwards. The groove 4c is also formed in an annular shape centered on the optical axis L of the camera module 2. The upper end of the camera module 2 is positioned on the inner circumference of the mounting portion 4a.

[0047] The arm portion 4b is connected to the outer circumferential surface of the mounting portion 4a. The tip end of the arm portion 4b is bent downwards. The tip end 4d of the arm portion 4b is formed in a flat plate shape. The thickness direction of the tip end 4d is approximately the same as the first direction. In the first direction, the tip end 4d is positioned on the outside of the holder 16. In addition, the magnet mounting portion 4e is connected to the outer circumferential surface of the mounting portion 4a. The magnet mounting portion 4e protrudes from the mounting portion 4a on both sides in the second direction.

[0048] A magnet 19 (see Figure 5) is attached to the upper surface of the magnet mounting portion 4e. The magnet 19 is positioned below the protrusion 17c of the rotating member 17. The magnet 19 magnetically attracts the protrusion 17c. The magnet 19 is magnetized to two poles in the circumferential direction of the annular mounting portion 4a. That is, the magnet 19 is composed of two magnetized portions polarized in the circumferential direction of the mounting portion 4a.

[0049] The second intermediate member 5 is made of a metal material such as stainless steel. The second intermediate member 5 is a leaf spring formed by bending a spring-like metal plate into a predetermined shape. The second intermediate member 5 consists of a base 5a positioned above the rotating member 17 and the first intermediate member 4, two arms 5b extending from the base 5a toward both sides in the first direction, and two arms 5c extending from the base 5a toward both sides in the second direction. A circular through hole is formed in the center of the base 5a. The upper end of the camera module 2 is positioned on the inner circumference side of the base 5a.

[0050] The tip of arm 5b is bent downwards. The tip 5d of arm 5b is formed in a flat shape. The thickness direction of tip 5d is approximately the same as the first direction. In the first direction, tip 5d is located outside tip 4d of arm 4b. The tip of arm 5c is bent downwards. The tip 5e of arm 5c is formed in a flat shape. The thickness direction of tip 5e is approximately the same as the second direction. In the second direction, tip 5e is located outside magnet mounting portion 4e.

[0051] As shown in Figure 4, the tip portion 5d has a recess 5f in which a portion of the sphere 27, which will be described later and constitute a part of the first support portion 12, is placed. The recess 5f is formed in a hemispherical shape. The recess 5f is recessed inward in the first direction. The tip portion 5e has a recess 5g in which a portion of the sphere 29, which will be described later and constitute a part of the second support portion 13, is placed. The recess 5g is formed in a hemispherical shape. The recess 5g is recessed inward in the second direction.

[0052] The fixed body 6 comprises a case body 21 having a rectangular tubular intermediate member holding portion 21a that rotatably holds the second intermediate member 5, a cover 22 fixed to the upper side of the case body 21, and a base plate 23 fixed to the lower side of the case body 21. The case body 21 is made of a resin material. The case body 21 consists of the aforementioned intermediate member holding portion 21a and a rectangular tubular FPC housing portion 21b that houses the flexible printed circuit board 18 on its inner circumference.

[0053] As shown in Figure 3, the intermediate member holder 21a is formed in the shape of a rectangular tube with openings at both ends in the vertical direction. The intermediate member holder 21a is positioned outside the movable body 3, the first intermediate member 4, and the second intermediate member 5 in the radial direction centered on the optical axis L. The outer shape of the intermediate member holder 21a is square. Specifically, the outer shape of the intermediate member holder 21a when viewed from the vertical direction is square. That is, when the movable body 3 is positioned in the reference position, the outer shape of the intermediate member holder 21a when viewed from the optical axis direction of the camera module 2 is square.

[0054] Two of the four sides of the square-shaped intermediate member holder 21a are parallel to the front-to-back direction, and the remaining two sides are parallel to the left-to-right direction. A through hole 21c is formed on the rear surface of the intermediate member holder 21a, in which a drive coil 44, which constitutes part of the magnetic drive mechanism 7, and a drive coil 48, which constitutes part of the magnetic drive mechanism 8, are arranged (see Figure 3). A through hole 21d is formed on the left surface of the intermediate member holder 21a, in which a drive coil 46, which constitutes part of the magnetic drive mechanism 7, and a drive coil 50, which constitutes part of the magnetic drive mechanism 9, are arranged (see Figure 3).

[0055] The FPC housing section 21b is formed in the shape of a rectangular tube with openings at both the top and bottom. The FPC housing section 21b is connected to the right side of the intermediate member holding section 21a. The cover 22 covers the case body 21 from above. The cover 22 has through holes in which the second intermediate member 5 and the like are placed. The base plate 23 closes the openings on the bottom of the case body 21 (i.e., the openings on the bottom of the intermediate member holding section 21a and the FPC housing section 21b).

[0056] The first support point 12 includes a support member 26 fixed to the tip 4d of the arm 4b of the first intermediate member 4, and a spherical sphere 27 fixed to the support member 26 (see Figure 5). The support member 26 and the sphere 27 are made of metal. The support member 26 includes a flat fixing portion 26a to which the sphere 27 is fixed. The thickness direction of the fixing portion 26a coincides with the first direction. The sphere 27 is fixed to the inner surface of the fixing portion 26a in the first direction. The fixing portion 26a is located outside the tip 4d in the first direction. The tip 5d of the arm 5b of the second intermediate member 5 is located between the tip 4d and the fixing portion 26a in the first direction. A part of the sphere 27 is located in the recess 5f. The sphere 27 is in point contact with the bottom surface of the recess 5f with a predetermined contact pressure due to the springiness of the arm 5b.

[0057] The second support point 13 includes a support member 28 fixed to the intermediate member holding portion 21a and a spherical sphere 29 fixed to the support member 28 (see Figure 4). The support member 28 and the sphere 29 are made of a metal material. The support member 28 includes a flat plate-shaped fixing portion 28a to which the sphere 29 is fixed. The thickness direction of the fixing portion 28a coincides with the second direction. The sphere 29 is fixed to the inner surface of the fixing portion 28a in the second direction. In the second direction, the fixing portion 28a is located outside the tip portion 5e of the arm portion 5c of the second intermediate member 5. A part of the sphere 29 is located in the recess 5g. The sphere 29 is in point contact with the bottom surface of the recess 5g with a predetermined contact pressure due to the springiness of the arm portion 5c.

[0058] The rotating support section 14 comprises a spherical holding member 30 formed in the shape of a flat plate and an annular shape, and a plurality of spherical spheres 31 held by the spherical holding member 30 (see Figure 5). In this embodiment, the rotating support section 14 comprises six spheres 31. The spherical holding member 30 and the spheres 31 are made of a metal material. The spherical holding member 30 is positioned such that its thickness direction coincides with the optical axis direction. Furthermore, the spherical holding member 30 is positioned such that its center coincides with the optical axis L. The spherical holding member 30 is positioned between the mounting section 17a and the mounting section 4a in the optical axis direction.

[0059] The sphere holding member 30 has a plurality (specifically, six) of through holes for holding the sphere 31. The six through holes are formed in the sphere holding member 30 at equal angular pitches centered on the optical axis L of the camera module 2. A portion of the sphere 31 held in the through holes of the sphere holding member 30 is positioned in a groove formed on the lower surface of the mounting portion 17a and in a groove 4c formed on the upper surface of the mounting portion 4a.

[0060] The sphere 31 is in contact with the bottom surface of the groove of the mounting portion 17a and the bottom surface of the groove 4c of the mounting portion 4a with a predetermined contact pressure due to the magnetic attraction force generated between the magnet 19 and the protrusion 17c. As described above, the magnet 19 is magnetized to two poles in the circumferential direction of the annularly formed mounting portion 4a. The magnet 19 and the protrusion 17c perform the function of holding the movable body 3 at a predetermined origin position in the rotational direction of the movable body 3 around the optical axis L of the camera module 2. Specifically, the magnet 19 and the protrusion 17c perform the function of holding the movable body 3 at the origin position in the rotational direction of the movable body 3 around the optical axis L when no current is supplied to the drive coils 43 and 45, which constitute part of the magnetic drive mechanism 7 and will be described later.

[0061] In the optical unit 1, when a change in the tilt of the movable body 3 is detected by a predetermined detection mechanism for detecting changes in the tilt of the movable body 3, current is supplied to at least one of the drive coils 44 and 46 (described later) that constitute part of the magnetic drive mechanism 7, the drive coil 48 (described later) that constitute part of the magnetic drive mechanism 8, and the drive coil 50 (described later) that constitute part of the magnetic drive mechanism 9, based on the detection result of this detection mechanism, and the oscillation is corrected.

[0062] (Configuration of the magnetic drive mechanism and its surrounding parts) Figure 7 is a rear view showing the holder 16, magnetic drive mechanism 8, magnetic sensors 35 and 37, magnetic plate 39, drive magnet 43, and drive coil 44 from the EE direction of Figure 6. Figure 8 is a side view showing the magnetic drive mechanism 9, magnetic sensors 36 and 38, magnetic plate 40, drive magnet 45, and drive coil 46 from the FF direction of Figure 6. Figure 9 is a plan view illustrating the arrangement of the drive magnets 43 and 45, the drive coils 44 and 46, and the magnetic sensors 37 and 38 when the movable body 3 shown in Figure 2 rotates relative to the fixed body 6 with the optical axis L of the camera module 2 as the pivot point. Figure 10 is a graph illustrating an example of the output signals SG1, SG2, etc. of the magnetic sensors 37 and 38 shown in Figure 9.

[0063] As described above, the optical unit 1 is equipped with magnetic drive mechanisms 7 to 9. The optical unit 1 also includes magnetic sensors 35 to 38 for detecting the rotational position of the movable body 3 relative to the fixed body 6, and flat magnetic plates 39 and 40 for biasing the movable body 3 toward a reference position, which is the position of the movable body 3 when the optical axis L of the camera module 2 is facing the reference direction. The magnetic sensors 35 to 38 are Hall sensors having Hall elements. In this embodiment, magnetic sensor 35 is the first magnetic sensor, magnetic sensor 36 is the second magnetic sensor, magnetic sensor 37 is the third magnetic sensor, and magnetic sensor 38 is the fourth magnetic sensor. In this embodiment, magnetic plate 39 is the first magnetic plate, and magnetic plate 40 is the second magnetic plate.

[0064] The magnetic drive mechanism 7 comprises a drive magnet 43 and a drive coil 44 arranged opposite each other in the front-rear direction, and a drive magnet 45 and a drive coil 46 arranged opposite each other in the left-right direction. The magnetic drive mechanism 7 rotates the movable body 3 relative to the fixed body 6 with the optical axis L of the camera module 2 as the pivot point. In this embodiment, the drive magnet 43 is the third drive magnet, the drive coil 44 is the third drive coil, the drive magnet 45 is the fourth drive magnet, and the drive coil 46 is the fourth drive coil.

[0065] The magnetic drive mechanism 8 includes a drive magnet 47 and a drive coil 48 that are positioned opposite each other in the front-rear direction. The magnetic drive mechanism 9 includes a drive magnet 49 and a drive coil 50 that are positioned opposite each other in the left-right direction. In this embodiment, the drive magnet 47 is the first drive magnet, the drive coil 48 is the first drive coil, the drive magnet 49 is the second drive magnet, and the drive coil 50 is the second drive coil.

[0066] The drive magnet 47 is formed in the shape of a rectangular flat plate. The drive magnet 47 is fixed to the recess 16b of the holder 16. That is, the drive magnet 47 is fixed to the rear side of the holder 16. When the movable body 3 is positioned in the reference position, the thickness direction of the drive magnet 47 coincides with the front-to-back direction. In addition, two of the four sides of the rectangular flat plate-shaped drive magnet 47 are parallel to the optical axis direction of the camera module 2. Specifically, the shorter side of the drive magnet 47 is parallel to the optical axis direction of the camera module 2.

[0067] The drive magnet 47 is magnetized with two poles in the vertical direction. That is, the drive magnet 47 is composed of two magnetized parts 47a and 47b that are polarized in the vertical direction with respect to the magnetization polarization line 47c (see Figure 7). The magnetization polarization line 47c is formed at the center of the drive magnet 47 in the optical axis direction of the camera module 2.

[0068] The drive coil 48 is an air-core coil formed, for example, by winding a conductor in an air-core shape. The drive coil 48 is wound in a long, narrow rectangular shape in the left-right direction. The drive coil 48 is attached to a flexible printed circuit board 53 (see Figure 4, hereinafter referred to as "FPC 53"). The FPC 53 is fixed to the outer surface of the case body 21. The drive coil 48 is located in the through hole 21c of the intermediate member holding portion 21a. That is, the drive coil 48 is located in the rear portion of the intermediate member holding portion 21a and is located behind the drive magnet 47.

[0069] The drive magnet 49 is formed in the shape of a rectangular flat plate. The drive magnet 49 is fixed to the recess 16d of the holder 16. That is, the drive magnet 49 is fixed to the left side of the holder 16. When the movable body 3 is positioned in the reference position, the thickness direction of the drive magnet 49 coincides with the left-right direction. In addition, two of the four sides of the rectangular flat plate-shaped drive magnet 49 are parallel to the optical axis direction of the camera module 2. Specifically, the shorter side of the drive magnet 49 is parallel to the optical axis direction of the camera module 2.

[0070] Similar to the drive magnet 47, the drive magnet 49 is magnetized with two poles in the vertical direction. That is, the drive magnet 49 is composed of two magnetized parts 49a and 49b that are polarized in the vertical direction with respect to the magnetization polarization line 49c (see Figure 8). The magnetization polarization line 49c is formed at the center of the drive magnet 49 in the optical axis direction of the camera module 2. The width of the drive magnet 49 in the optical axis direction is equal to the width of the drive magnet 47 in the optical axis direction. The drive magnet 49 is positioned in the same location as the drive magnet 47 in the optical axis direction.

[0071] The drive coil 50 is, for example, an air-core coil formed by winding a conductor in an air-core shape. The drive coil 50 is wound in an elongated rectangular shape in the front-to-back direction. The drive coil 50 is attached to the FPC 53. The drive coil 50 is located in the through hole 21d of the intermediate member holding portion 21a. That is, the drive coil 50 is located in the left-side portion of the intermediate member holding portion 21a and is located to the left of the drive magnet 49. The width of the drive coil 50 in the optical axis direction is equal to the width of the drive coil 48 in the optical axis direction.

[0072] The magnetic drive mechanism 8 is positioned behind the magnetic drive mechanism 9. That is, the rear side (Y2 direction) is the side in the front-to-back direction where the magnetic drive mechanism 8 is positioned relative to the magnetic drive mechanism 9. Also, the magnetic drive mechanism 9 is positioned to the left of the magnetic drive mechanism 8. That is, the left side (X2 direction) is the side in the left-to-right direction where the magnetic drive mechanism 9 is positioned relative to the magnetic drive mechanism 8.

[0073] The magnetic drive mechanism 8 rotates the movable body 3 relative to the fixed body 6 with a second rotation axis L12, which is parallel to the left-right direction, as its pivot point. The magnetic drive mechanism 9 rotates the movable body 3 relative to the fixed body 6 with a first rotation axis L11, which is parallel to the front-rear direction, as its pivot point. The second rotation axis L12 intersects the optical axis L of the camera module 2. The first rotation axis L11 intersects the optical axis L of the camera module 2. Also, the first rotation axis L11 and the second rotation axis L12 are perpendicular to each other.

[0074] The vertical position of the second rotation axis L12 and the vertical position of the first rotation axis L11 are the same in the vertical direction as the vertical position of the point where the bottom surface of the recess 5g of the second intermediate member 5 and the sphere 29 make point contact. When the movable body 3 is positioned in the reference position, the vertical centers of the drive magnet 47, the drive coil 48, the drive magnet 49, and the drive coil 50 are all located at the same vertical position. Furthermore, when the movable body 3 is positioned in the reference position, the vertical centers of the drive magnet 47, the drive coil 48, the drive magnet 49, and the drive coil 50 are all located at the same vertical position as the first rotation axis L11 and the second rotation axis L12.

[0075] The magnetic sensor 35 is positioned opposite the drive magnet 47 in the front-rear direction. The magnetic sensor 35 is positioned on the inner circumference side of the drive coil 48 and behind the drive magnet 47. Furthermore, the magnetic sensor 35 is mounted on the same side of the FPC 53 as the side to which the drive coil 48 is attached. When the movable body 3 is positioned in the reference position, the vertical center of the magnetic sensor 35 (more specifically, the vertical center of the magnetic sensing part of the magnetic sensor 35) and the vertical center of the drive magnet 47 are located at the same position in the vertical direction. That is, when the movable body 3 is positioned in the reference position, the vertical center of the magnetic sensor 35 and the magnetization polarization line 47c are located at the same position in the vertical direction. The rotational position of the movable body 3 relative to the fixed body 6 with the second rotation axis L12 as the rotation center is detected by the magnetic sensor 35 and the drive magnet 47.

[0076] The magnetic sensor 36 is positioned opposite the drive magnet 49 in the left-right direction. The magnetic sensor 36 is positioned on the inner circumference side of the drive coil 50 and to the left of the drive magnet 49. Furthermore, the magnetic sensor 36 is mounted on the same side of the FPC 53 as the side to which the drive coil 50 is attached. When the movable body 3 is positioned in the reference position, the vertical center of the magnetic sensor 36 (more specifically, the vertical center of the magnetic sensing part of the magnetic sensor 36) and the vertical center of the drive magnet 49 are located at the same position in the vertical direction. That is, when the movable body 3 is positioned in the reference position, the vertical center of the magnetic sensor 36 and the magnetization polarization line 49c are located at the same position in the vertical direction. The rotational position of the movable body 3 relative to the fixed body 6 with the first rotation axis line L11 as the rotation center is detected by the magnetic sensor 36 and the drive magnet 49.

[0077] The magnetic plates 39 and 40 are formed in the shape of a square or rectangular plate. In this embodiment, the magnetic plates 39 and 40 are formed in the shape of a square plate. The magnetic plates 39 and 40 are also formed from, for example, a magnetic metallic material. The magnetic plate 39 is positioned so that its thickness direction coincides with its front-to-back direction. Two of the four sides of the square plate-shaped magnetic plate 39 are parallel to the up-and-down direction. The magnetic plate 40 is positioned so that its thickness direction coincides with its left-to-right direction. Two of the four sides of the square plate-shaped magnetic plate 40 are parallel to the up-and-down direction.

[0078] The magnetic plate 39 is positioned opposite the drive magnet 47 in the front-rear direction. Specifically, the magnetic plate 39 is mounted on the side of the FPC 53 opposite to the side to which the drive coil 48 is attached, and is positioned opposite the drive magnet 47 in the front-rear direction via the FPC 53. When the movable body 3 is positioned in the reference position, the vertical center of the magnetic plate 39 and the vertical center of the drive magnet 47 are located at the same position in the vertical direction. The magnetic attractive force generated between the magnetic plate 39 and the drive magnet 47 biases the movable body 3 toward the reference position in the rotational direction with the second rotation axis L12 as the pivot point.

[0079] The magnetic plate 40 is positioned opposite the drive magnet 49 in the left-right direction. Specifically, the magnetic plate 40 is mounted on the side of the FPC 53 opposite to the side to which the drive coil 50 is attached, and is positioned opposite the drive magnet 49 in the left-right direction via the FPC 53. When the movable body 3 is positioned in the reference position, the vertical center of the magnetic plate 40 and the vertical center of the drive magnet 49 are located at the same position in the vertical direction. The magnetic attractive force generated between the magnetic plate 40 and the drive magnet 49 biases the movable body 3 toward the reference position in the rotational direction with the first rotation axis L11 as the pivot point.

[0080] Thus, in this embodiment, the position of the movable body 3, which is positioned at the reference position, is maintained by the magnetic attractive force generated between the magnetic plate 39 and the driving magnet 47, and the magnetic attractive force generated between the magnetic plate 40 and the driving magnet 49. In other words, the driving magnets 47 and 49 and the magnetic plates 39 and 40 perform the function of maintaining the posture of the movable body 3 when no current is supplied to the driving coils 48 and 50.

[0081] The drive magnet 43 is formed in the shape of a rectangular flat plate. The drive magnet 43 is fixed to the recess 16a of the holder 16. That is, the drive magnet 43 is fixed to the rear side of the holder 16. When the movable body 3 is positioned in the reference position, the thickness direction of the drive magnet 43 coincides with the front-to-back direction. In addition, two of the four sides of the rectangular flat plate-shaped drive magnet 43 are parallel to the optical axis direction of the camera module 2. Specifically, the longer side of the drive magnet 43 is parallel to the optical axis direction of the camera module 2.

[0082] The drive magnet 43 is magnetized with two poles in the left-right direction. That is, the drive magnet 43 is composed of two magnetized parts 43a and 43b that are polarized in the left-right direction with the magnetization polarization line 43c as the boundary (see Figure 7). The magnetization polarization line 43c is formed at the center of the drive magnet 43 in the left-right direction.

[0083] The drive coil 44 is, for example, an air-core coil formed by winding a conductor in an air-core manner. The drive coil 44 is wound in a long rectangular shape in the vertical direction. The drive coil 44 is attached to the FPC 53. The drive coil 44 is located in the through hole 21c of the intermediate member holding portion 21a. That is, the drive coil 44 is located in the rear portion of the intermediate member holding portion 21a and is located behind the drive magnet 43. The drive magnet 43 and the drive coil 44 are located to the left of the drive magnet 47 and the drive coil 48. That is, the drive magnet 43 and the drive coil 44 are located to the left of the magnetic drive mechanism 8.

[0084] The drive magnet 45 is formed in the shape of a rectangular flat plate. The drive magnet 45 is fixed to the recess 16c of the holder 16. That is, the drive magnet 45 is fixed to the left side of the holder 16. When the movable body 3 is positioned in the reference position, the thickness direction of the drive magnet 45 coincides with the left-right direction. In addition, two of the four sides of the rectangular flat plate-shaped drive magnet 45 are parallel to the optical axis direction of the camera module 2. Specifically, the longer side of the drive magnet 45 is parallel to the optical axis direction of the camera module 2.

[0085] The drive magnet 45 is magnetized with two poles in the front-rear direction. That is, the drive magnet 45 is composed of two magnetized parts 45a and 45b that are polarized in the front-rear direction with respect to the magnetization polarization line 45c (see Figure 8). The magnetization polarization line 45c is formed at the center of the drive magnet 45 in the front-rear direction. In this embodiment, the magnetic pole on the left side of the drive magnet 43 (for example, the magnetic pole of the magnetized part 43a) and the magnetic pole on the rear side of the drive magnet 45 (for example, the magnetic pole of the magnetized part 45a) are the same magnetic pole.

[0086] The drive coil 46 is an air-core coil formed, for example, by winding a conductor in an air-core shape. The drive coil 46 is wound in a long rectangular shape in the vertical direction. The winding direction of the drive coil 46 is, for example, the opposite direction to the winding direction of the drive coil 44. The drive coil 46 is attached to the FPC 53. The drive coil 46 is located in the through hole 21d of the intermediate member holding portion 21a. That is, the drive coil 46 is located in the left-side portion of the intermediate member holding portion 21a and is located to the left of the drive magnet 45. The drive magnet 45 and the drive coil 46 are located behind the drive magnet 49 and the drive coil 50. That is, the drive magnet 45 and the drive coil 46 are located behind the magnetic drive mechanism 9.

[0087] The magnetic sensor 37 is positioned opposite the drive magnet 43 in the front-rear direction. The magnetic sensor 37 is positioned on the inner circumference side of the drive coil 44 and behind the drive magnet 43. Furthermore, the magnetic sensor 37 is mounted on the same side of the FPC 53 as the side to which the drive coil 44 is attached. When the movable body 3 is positioned at the origin in the rotation direction of the movable body 3 around the optical axis L of the camera module 2, the left-right center of the magnetic sensor 37 (more specifically, the left-right center of the magnetic sensing part of the magnetic sensor 37) and the left-right center of the drive magnet 43 are located at the same position in the left-right direction. That is, when the movable body 3 is positioned at the origin in the rotation direction of the movable body 3, the left-right center of the magnetic sensor 37 and the magnetization polarization line 43c are located at the same position in the left-right direction.

[0088] The magnetic sensor 38 is positioned opposite the drive magnet 45 in the left-right direction. The magnetic sensor 38 is positioned on the inner circumference side of the drive coil 46 and to the left of the drive magnet 45. Furthermore, the magnetic sensor 38 is mounted on the same side of the FPC 53 to which the drive coil 46 is attached. When the movable body 3 is positioned at the origin in the rotation direction of the movable body 3 around the optical axis L of the camera module 2, the front-rear center of the magnetic sensor 38 (more specifically, the front-rear center of the magnetic sensing part of the magnetic sensor 38) and the front-rear center of the drive magnet 45 are located at the same position in the front-rear direction. That is, when the movable body 3 is positioned at the origin in the rotation direction of the movable body 3, the front-rear center of the magnetic sensor 38 and the magnetization polarization line 45c are located at the same position in the front-rear direction.

[0089] In this configuration, the rotational position of the movable body 3 relative to the fixed body 6, with the optical axis L of the camera module 2 as the pivot point, is detected by magnetic sensors 37 and 38 and driving magnets 43 and 45.

[0090] As described above, the drive magnets 43 and 47 are fixed to the rear side of the holder 16, and the drive coils 44 and 48 are located in the rear portion of the intermediate member holding part 21a. The magnetic sensors 35 and 37 are located on the inner circumference side of the drive coils 44 and 48, and the magnetic plate 39 is mounted on the side of the FPC 53 opposite to the side to which the drive coils 48 are attached. The drive magnets 45 and 49 are fixed to the left side of the holder 16, and the drive coils 46 and 50 are located in the left portion of the intermediate member holding part 21a. The magnetic sensors 36 and 38 are located on the inner circumference side of the drive coils 46 and 50, and the magnetic plate 40 is mounted on the side of the FPC 53 opposite to the side to which the drive coil 50 is attached.

[0091] In other words, the magnetic drive mechanism 8, magnetic sensors 35 and 37, magnetic plate 39, drive magnet 43, and drive coil 44 are arranged along one side of the intermediate member holder 21a that is parallel to the left-right direction (specifically, the rear side), out of the four sides of the intermediate member holder 21a which has a square shape when viewed from above. The magnetic drive mechanism 9, magnetic sensors 36 and 38, magnetic plate 40, drive magnet 45, and drive coil 46 are arranged along one side of the intermediate member holder 21a which is parallel to the front-back direction (specifically, the left side), out of the four sides of the intermediate member holder 21a. In other words, the magnetic drive mechanisms 7 to 9 are arranged along two sides of the intermediate member holder 21a which has a square shape when viewed from above.

[0092] As shown in Figure 6, a portion of the drive magnet 47 and a portion of the drive coil 48 are positioned on the first rotation axis L11. Specifically, the left portion of the drive magnet 47 and the left portion of the drive coil 48 are positioned on the first rotation axis L11, and the centers of the drive magnet 47 and the drive coil 48 are offset to the right from the first rotation axis L11. Also, as described above, the drive magnet 43 and the drive coil 44 are positioned on the left side of the magnetic drive mechanism 8.

[0093] In other words, the drive magnet 43 and the drive coil 44 are positioned on one side of the magnetic drive mechanism 8 in the left-right direction, and the centers of the drive magnet 47 and the drive coil 48 are positioned offset to the other side in the left-right direction from the first rotation axis L11. Also, as shown in Figure 7, the center of the magnetic sensor 35 (more specifically, the center of the magnetic sensing part of the magnetic sensor 35) and the center of the magnetic plate 39 are positioned on the first rotation axis L11.

[0094] Furthermore, a portion of the drive magnet 49 and a portion of the drive coil 50 are positioned on the second rotation axis L12. Specifically, the rear portion of the drive magnet 49 and the rear portion of the drive coil 50 are positioned on the second rotation axis L12, and the centers of the drive magnet 49 and the drive coil 50 are offset forward from the second rotation axis L12. Also, as described above, the drive magnet 45 and the drive coil 46 are positioned on the rear side of the magnetic drive mechanism 9.

[0095] In other words, the drive magnet 45 and the drive coil 46 are positioned on one side of the magnetic drive mechanism 9 in the front-rear direction, and the centers of the drive magnet 49 and the drive coil 50 are positioned offset to the other side in the front-rear direction from the second rotation axis L12. Also, as shown in Figure 8, the center of the magnetic sensor 36 (more specifically, the center of the magnetic sensing part of the magnetic sensor 36) and the center of the magnetic plate 40 are positioned on the second rotation axis L12.

[0096] As described above, the rotational position of the movable body 3 relative to the fixed body 6, with the optical axis L of the camera module 2 as the pivot point, is detected by the magnetic sensors 37 and 38 and the drive magnets 43 and 45. The magnetic sensors 37 and 38 are electrically connected to the control unit 54 (see Figure 9) of the optical unit 1. That is, the optical unit 1 is equipped with a control unit 54 to which the magnetic sensors 37 and 38 are electrically connected. The magnetic sensors 35 and 36 are also electrically connected to the control unit 54. The output signals from the magnetic sensors 35 to 38 are input to the control unit 54, and the control unit 54 detects the rotational position of the movable body 3 relative to the fixed body 6 based on the output signals from the magnetic sensors 35 to 38.

[0097] If we define the clockwise direction in Figure 2 as the clockwise direction and the counterclockwise direction in Figure 2 as the counterclockwise direction (that is, if we define the clockwise direction when viewed from above as the clockwise direction and the counterclockwise direction when viewed from above as the counterclockwise direction), when the movable body 3 rotates clockwise around the optical axis L as the pivot point in the rotation direction of the movable body 3 with respect to the fixed body 6 with respect to the optical axis L of the camera module 2, as shown in Figure 9(A), the distance between the drive magnet 43 and the magnetic sensor 37 decreases, but the distance between the drive magnet 45 and the magnetic sensor 38 increases. On the other hand, when the movable body 3 rotates counterclockwise around the optical axis L as the pivot point, as shown in Figure 9(B), the distance between the drive magnet 43 and the magnetic sensor 37 increases, but the distance between the drive magnet 45 and the magnetic sensor 38 decreases.

[0098] In this configuration, the left magnetic pole of the drive magnet 43 and the rear magnetic pole of the drive magnet 45 are the same. Furthermore, the distance between the drive magnets 43 and 45 and the magnetic sensors 37 and 38 affects the output signals of the magnetic sensors 37 and 38. Therefore, if we define the rotation angle of the movable body 3 when it rotates clockwise around the optical axis L from the origin as a positive angle, and the rotation angle of the movable body 3 when it rotates counterclockwise around the optical axis L from the origin as a negative angle, then the output signal SG1 of the magnetic sensor 37 and the output signal SG2 of the magnetic sensor 38 will fluctuate according to the rotation angle of the movable body 3 from the origin (0°), for example, as shown in Figure 10. In other words, the output signals SG1 and SG2 do not fluctuate linearly according to the rotation angle of the movable body 3 from the origin.

[0099] Therefore, if the control unit 54 detects the rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L as the pivot point using only the output signal SG1 or output signal SG2, the detection accuracy of the rotational position of the movable body 3 will decrease. In this embodiment, the control unit 54 detects the rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L as the pivot point based on the output signals SG1 and SG2 of the two magnetic sensors 37 and 38.

[0100] Specifically, in this embodiment, the left magnetic pole of the drive magnet 43 and the rear magnetic pole of the drive magnet 45 are the same magnetic pole. As shown in Figure 10, the difference signal SG3, obtained by subtracting output signal SG2 from output signal SG1, fluctuates linearly according to the rotation angle of the movable body 3 from the origin position. Therefore, the control unit 54 generates the difference signal SG3 from output signals SG1 and SG2, and detects the rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L as the rotation center based on the difference signal SG3.

[0101] (Main effects of this form) As explained above, in this embodiment, the magnetic drive mechanisms 7 to 9 are arranged along two sides of the intermediate member holding portion 21a, which has a square shape when viewed from above. Therefore, in portable devices and the like in which the optical unit 1 of this embodiment is mounted, various components can be arranged so that magnetic interference does not occur in the areas along each of the two sides of the intermediate member holding portion 21a. Thus, in this embodiment, it is possible to suppress a decrease in the design freedom of portable devices and the like in which the optical unit 1 is mounted.

[0102] In this embodiment, the drive magnet 43 and drive coil 44 are arranged along the rear edge of the intermediate member holder 21a, and the drive magnet 45 and drive coil 46 are arranged along the left edge of the intermediate member holder 21a. Therefore, in this embodiment, compared to cases where the drive magnets 43, 45 and drive coils 44, 46 are arranged along the rear edge of the intermediate member holder 21a, or where the drive magnets 43, 45 and drive coils 44, 46 are arranged along the left edge of the intermediate member holder 21a, it is possible to suppress the difference in size between the drive magnet 47 and the drive magnet 49, and the difference in size between the drive coil 48 and the drive coil 50. Consequently, in this embodiment, it is possible to suppress the difference between the driving force of the magnetic drive mechanism 8 and the driving force of the magnetic drive mechanism 9.

[0103] In this embodiment, the left portion of the drive magnet 47 and the left portion of the drive coil 48 are positioned on the first rotation axis L11, and the centers of the drive magnet 47 and the drive coil 48 are offset to the right from the first rotation axis L11. In addition, in this embodiment, the drive magnet 43 and the drive coil 44 are positioned on the left side of the magnetic drive mechanism 8. Therefore, in this embodiment, it is possible to increase the size of the drive magnet 47 and the drive coil 48 in the left-right direction compared to the case where the centers of the drive magnet 47 and the drive coil 48 are positioned on the first rotation axis L11. Consequently, in this embodiment, it is possible to increase the driving force of the magnetic drive mechanism 8.

[0104] In this embodiment, the rear portion of the drive magnet 49 and the rear portion of the drive coil 50 are positioned on the second rotation axis L12, and the centers of the drive magnet 49 and the drive coil 50 are offset forward from the second rotation axis L12. In addition, in this embodiment, the drive magnet 45 and the drive coil 46 are positioned on the rear side of the magnetic drive mechanism 9. Therefore, in this embodiment, it is possible to increase the size of the drive magnet 49 and the drive coil 50 in the front-rear direction compared to the case where the centers of the drive magnet 49 and the drive coil 50 are positioned on the second rotation axis L12. Consequently, in this embodiment, it is possible to increase the driving force of the magnetic drive mechanism 9.

[0105] In this embodiment, the center of the magnetic sensor 35, which is positioned opposite the drive magnet 47 in the front-rear direction, is located on the first rotation axis L11. Therefore, in this embodiment, as shown in Figure 7(B), it is possible to suppress the amount of misalignment in the optical axis direction between the drive magnet 47 and the magnetic sensor 35 when the movable body 3 is rotated relative to the fixed body 6 with the first rotation axis L11 as the rotation center. Consequently, in this embodiment, it is possible to appropriately detect the rotational position of the movable body 3 when the movable body 3 is rotated relative to the fixed body 6 with the second rotation axis L12 as the rotation center, using the drive magnet 47 and the magnetic sensor 35.

[0106] Similarly, in this embodiment, since the center of the magnetic sensor 36, which is positioned opposite the drive magnet 49 in the left-right direction, is located on the second rotation axis L12, it becomes possible to suppress the amount of misalignment in the optical axis direction between the drive magnet 49 and the magnetic sensor 36 when the movable body 3 is rotated relative to the fixed body 6 with the second rotation axis L12 as the rotation center. Therefore, in this embodiment, it becomes possible to appropriately detect the rotational position of the movable body 3 when the movable body 3 is rotated relative to the fixed body 6 with the first rotation axis L11 as the rotation center, using the drive magnet 49 and the magnetic sensor 36.

[0107] In this embodiment, the center of the magnetic plate 39, which is positioned opposite the drive magnet 47 in the front-rear direction, is located on the first rotation axis L11. Therefore, in this embodiment, as shown in Figure 7(B), when the movable body 3 is rotated relative to the fixed body 6 with the first rotation axis L11 as the pivot point, it is possible to suppress the amount of misalignment in the optical axis direction between the drive magnet 47 and the magnetic plate 39. Consequently, in this embodiment, when the movable body 3 is rotated relative to the fixed body 6 with the first rotation axis L11 as the pivot point, it is possible to reduce the influence of the magnetic attractive force generated between the drive magnet 47 and the magnetic plate 39 on the driving force of the magnetic drive mechanism 9.

[0108] Similarly, in this embodiment, since the center of the magnetic plate 40, which is positioned opposite the driving magnet 49 in the left-right direction, is located on the second rotation axis L12, it becomes possible to suppress the amount of misalignment in the optical axis direction between the driving magnet 49 and the magnetic plate 40 when the movable body 3 is rotated relative to the fixed body 6 with the second rotation axis L12 as the rotation center. Therefore, in this embodiment, when the movable body 3 is rotated relative to the fixed body 6 with the second rotation axis L12 as the rotation center, it becomes possible to reduce the influence of the magnetic attractive force generated between the driving magnet 49 and the magnetic plate 40 on the driving force of the magnetic drive mechanism 8.

[0109] In this configuration, the drive magnet 43 and drive coil 44 are positioned on the left side of the magnetic drive mechanism 8, while the drive magnet 45 and drive coil 46 are positioned behind the magnetic drive mechanism 9. Therefore, in this configuration, as shown in Figure 9(A), when the movable body 3 rotates clockwise around the optical axis L as the pivot point, the distance between the drive magnet 43 and the drive coil 44 decreases, but the distance between the drive magnet 45 and the drive coil 46 increases. Also, as shown in Figure 9(B), when the movable body 3 rotates counterclockwise around the optical axis L as the pivot point, the distance between the drive magnet 43 and the drive coil 44 increases, but the distance between the drive magnet 45 and the drive coil 46 decreases.

[0110] Therefore, in this embodiment, it becomes possible to suppress the variation between the driving force of the magnetic drive mechanism 7 when the movable body 3 rotates clockwise and the driving force of the magnetic drive mechanism 7 when the movable body 3 rotates counterclockwise. As a result, in this embodiment, it becomes possible to stabilize the rotational movement of the movable body 3 when the movable body 3 rotates relative to the fixed body 6 with the optical axis L as the pivot point.

[0111] In this configuration, the control unit 54 detects the rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L as the pivot point, based on the output signals SG1 and SG2 of the two magnetic sensors 37 and 38. Specifically, the control unit 54 generates a difference signal SG3 from the output signal SG1 of the magnetic sensor 37 and the output signal SG2 of the magnetic sensor 38, which changes linearly according to the rotation angle of the movable body 3 from the origin position, and detects the rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L as the pivot point, based on the difference signal SG3. Therefore, in this configuration, even if the drive magnet 43 is located on the left side of the magnetic drive mechanism 8 and the drive magnet 45 is located behind the magnetic drive mechanism 9, it is possible to appropriately detect the rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L as the pivot point.

[0112] (Other embodiments) The above-described embodiments are examples of preferred embodiments of the present invention, but are not limited thereto, and various modifications can be made without altering the essence of the invention.

[0113] In the above-described configuration, the drive magnet 43 and the drive coil 44 may be positioned on the right side of the magnetic drive mechanism 8. In this case, the right portion of the drive magnet 47 and the right portion of the drive coil 48 are positioned on the first rotation axis L11, and the centers of the drive magnet 47 and the drive coil 48 are offset to the left from the first rotation axis L11. Also, in the above-described configuration, the drive magnet 45 and the drive coil 46 may be positioned on the front side of the magnetic drive mechanism 9. In this case, the front portion of the drive magnet 49 and the front portion of the drive coil 50 are positioned on the second rotation axis L12, and the centers of the drive magnet 49 and the drive coil 50 are offset to the rear from the second rotation axis L12.

[0114] In the above-described configuration, the magnetic pole on the left side of the driving magnet 43 (for example, the magnetic pole of the magnetized part 43a) and the magnetic pole on the rear side of the driving magnet 45 (for example, the magnetic pole of the magnetized part 45a) may be different magnetic poles. In this case, the winding direction of the driving coil 44 and the winding direction of the driving coil 46 are in the same direction. Also in this case, the sum signal obtained by adding the output signal SG2 to the output signal SG1 fluctuates linearly according to the rotation angle of the movable body 3 from the origin position. Therefore, the control unit 54 generates a sum signal from the output signals SG1 and SG2 and detects the rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L as the rotation center based on the sum signal.

[0115] In the above-described configuration, the drive coils 44, 46, 48, 50, magnetic sensors 35-38, and magnetic plates 39, 40 may be attached to the holder 16, and the drive magnets 43, 45, 47, 49 may be attached to the intermediate member holding portion 21a. Also, in the above-described configuration, the outer shape of the intermediate member holding portion 21a when viewed from above or below may be rectangular. Furthermore, in the above-described configuration, the case body 21 does not need to have an FPC housing portion 21b. That is, the case body 21 may consist only of the intermediate member holding portion 21a. [Explanation of symbols]

[0116] 1. Optical unit (optical unit with image stabilization function) 2 Camera Modules 3 Movable body 4. First intermediate member 5. Second intermediate member 6 Fixed body 7. Magnetic drive mechanism (third magnetic drive mechanism) 8. Magnetic drive mechanism (first magnetic drive mechanism) 9. Magnetic drive mechanism (second magnetic drive mechanism) 21a Intermediate member holding part 35 Magnetic sensor (first magnetic sensor) 36 Magnetic Sensor (Second Magnetic Sensor) 37 Magnetic Sensor (Third Magnetic Sensor) 38 Magnetic Sensor (Fourth Magnetic Sensor) 39 Magnetic plate (first magnetic plate) 40 Magnetic plate (second magnetic plate) 43. Drive magnet (third drive magnet) 43a, 43b Magnetized part 44. Drive coil (3rd drive coil) 45. Drive magnet (4th drive magnet) 45a, 45b Magnetized part 46. ​​Drive coil (4th drive coil) 47. Drive magnet (first drive magnet) 48. Drive coil (first drive coil) 49. Drive magnet (second drive magnet) 50 Drive coil (second drive coil) 54 Control Unit L Camera Module Optical Axis L11 First Moving Axis Line L12 Second Axis Line SG1 Magnetic Sensor Output Signal (Output signal of the third magnetic sensor) SG2 Magnetic Sensor Output Signal (Output signal of the 4th magnetic sensor) X direction perpendicular to the second optical axis X1 4th direction side X2 3rd direction side Y direction perpendicular to the first optical axis Y1 2nd direction side Y2 First direction side

Claims

1. The device comprises a movable body having a camera module, a first intermediate member that rotatably holds the movable body, a second intermediate member that rotatably holds the first intermediate member, a fixed body that rotatably holds the second intermediate member, a first magnetic drive mechanism and a second magnetic drive mechanism for rotating the movable body relative to the fixed body so that the optical axis of the camera module is tilted in an arbitrary direction, a third magnetic drive mechanism for rotating the movable body relative to the fixed body with the optical axis of the camera module as the pivot point, a first magnetic sensor and a second magnetic sensor for detecting the rotational position of the movable body relative to the fixed body, and a flat first magnetic plate and a second magnetic plate for biasing the movable body toward a reference position of the movable body, which is the position of the movable body when the optical axis of the camera module is facing a predetermined reference direction. When the movable body is positioned at the reference position, a predetermined direction perpendicular to the optical axis of the camera module is defined as the first optical axis orthogonal direction, and when the movable body is positioned at the reference position, a direction perpendicular to both the optical axis of the camera module and the first optical axis orthogonal direction is defined as the second optical axis orthogonal direction. The first magnetic drive mechanism comprises a first drive magnet and a first drive coil arranged opposite to each other in a direction perpendicular to the first optical axis, and rotates the movable body relative to the fixed body with a second rotation axis parallel to the direction perpendicular to the second optical axis as the rotation center. The second magnetic drive mechanism comprises a second drive magnet and a second drive coil arranged opposite to each other in a direction perpendicular to the second optical axis, and rotates the movable body relative to the fixed body with a first rotation axis parallel to the direction perpendicular to the first optical axis as the rotation center. The third magnetic drive mechanism comprises a third drive magnet and a third drive coil arranged opposite to each other in a direction perpendicular to the first optical axis, and a fourth drive magnet and a fourth drive coil arranged opposite to each other in a direction perpendicular to the second optical axis. The first magnetic sensor and the first magnetic plate are arranged opposite the first driving magnet in a direction perpendicular to the first optical axis, The second magnetic sensor and the second magnetic plate are arranged opposite the second driving magnet in a direction perpendicular to the second optical axis. The fixed body includes an intermediate member holding portion that rotatably holds the second intermediate member, When the movable body is positioned at the reference position, the outer shape of the intermediate member holder, when viewed from the optical axis direction, which is the direction of the optical axis of the camera module, is square or rectangular. The first magnetic drive mechanism, the first magnetic sensor, the first magnetic plate, the third drive magnet, and the third drive coil are arranged along one side of the intermediate member holding portion that is parallel to the direction perpendicular to the second optical axis, among the four sides of the intermediate member holding portion that have a square or rectangular shape when viewed from the optical axis direction when the movable body is positioned at the reference position. The second magnetic drive mechanism, the second magnetic sensor, the second magnetic plate, the fourth drive magnet, and the fourth drive coil are arranged along one of the four sides of the intermediate member holder that is parallel to the direction perpendicular to the first optical axis. A portion of the first drive magnet and a portion of the first drive coil are arranged on the first pivot axis. The third drive magnet and the third drive coil are arranged on one side of the first magnetic drive mechanism in a direction perpendicular to the second optical axis. The center of the first drive magnet and the center of the first drive coil are positioned offset from the first rotation axis to the other side in the direction perpendicular to the second optical axis. The center of the first magnetic sensor and the center of the first magnetic plate are arranged on the first rotation axis, A portion of the second drive magnet and a portion of the second drive coil are arranged on the second pivot axis. The fourth drive magnet and the fourth drive coil are arranged on one side of the second magnetic drive mechanism in a direction perpendicular to the first optical axis. The center of the second drive magnet and the center of the second drive coil are positioned offset from the second rotation axis to the other side in the direction perpendicular to the first optical axis. An optical unit with a vibration correction function, characterized in that the center of the second magnetic sensor and the center of the second magnetic plate are arranged on the second rotation axis.

2. If we define the direction perpendicular to the first optical axis as the first direction side on which the first magnetic drive mechanism is positioned relative to the second magnetic drive mechanism, the opposite side of the first direction side as the second direction side, the direction perpendicular to the second optical axis as the third direction side on which the second magnetic drive mechanism is positioned relative to the first magnetic drive mechanism, and the opposite side of the third direction side as the fourth direction side, The third drive magnet and the third drive coil are arranged on the third direction side of the first magnetic drive mechanism. The fourth drive magnet and the fourth drive coil are arranged on the first direction side of the second magnetic drive mechanism. The center of the first drive magnet and the center of the first drive coil are offset from the first rotation axis toward the fourth direction, The optical unit with vibration correction function according to claim 1, characterized in that the center of the second drive magnet and the center of the second drive coil are offset from the second rotation axis toward the second direction.

3. The system comprises a third magnetic sensor positioned opposite the third driving magnet in a direction perpendicular to the first optical axis, a fourth magnetic sensor positioned opposite the fourth driving magnet in a direction perpendicular to the second optical axis, and a control unit to which the third magnetic sensor and the fourth magnetic sensor are electrically connected. The optical unit with shake correction function according to claim 2, characterized in that the control unit detects the rotational position of the movable body relative to the fixed body with respect to the optical axis of the camera module as the rotational center, based on the output signal of the third magnetic sensor and the output signal of the fourth magnetic sensor.

4. The third driving magnet is composed of two magnetized parts polarized in a direction perpendicular to the second optical axis, The fourth drive magnet is composed of two magnetized parts polarized in a direction perpendicular to the first optical axis, The optical unit with vibration correction function according to claim 2 or 3, characterized in that the magnetic pole on the third direction side of the third drive magnet and the magnetic pole on the first direction side of the fourth drive magnet are the same magnetic pole.

Images