Optical unit with shake correction function

Abstract

The present application provides a kind of optical unit with shake correction function, the optical unit with shake correction function has: movable body, it has camera module;First magnetic drive mechanism, for the optical axis of camera module is the rotation center of rotation for movable body to rotate;And second magnetic drive mechanism and third magnetic drive mechanism, for the optical axis of camera module is tilted to any direction for movable body to rotate, wherein, compared with the past, the design freedom of portable equipment etc. Equipped with optical unit with shake correction function can be inhibited reduction.In optical unit with shake correction function (1), first magnetic drive mechanism (7), second magnetic drive mechanism (8) and third magnetic drive mechanism (9) are arranged along the two sides of intermediate part holding portion (21a), and the profile when the optical axis (L) of camera module (2) is in reference position is square when observed from the optical axis direction.

Description

TECHNICAL FIELD

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

[0002] Conventionally, an optical unit with a shake correction function mounted on a portable device or the like is known (for example, refer to Patent Literature 1). The optical unit with a shake correction function described in Patent Literature 1 has an optical unit main body portion housed in a housing. The optical unit main body portion has an imaging module having a lens and an imaging element. In the optical unit with a shake correction function, the imaging module is rotated about an optical axis of the lens, a first axis orthogonal to the optical axis, and a second axis orthogonal to the optical axis and the first axis to perform shake correction.

[0003] In the optical unit with a shake correction function described in Patent Literature 1, the optical unit main body portion has: a movable body having the imaging module; a rotation support mechanism that supports the movable body so as to be rotatable about the optical axis; a gimbal mechanism that supports the rotation support mechanism so as to be rotatable about the first axis and the second axis; and a fixed body that supports the movable body via the gimbal mechanism and the rotation support mechanism. In addition, the optical unit main body portion has: a first shake correction magnetic drive mechanism that causes the movable body to generate a driving force about an X axis that is inclined by 45° with respect to the first axis and the second axis about the optical axis; a second shake correction magnetic drive mechanism that causes the movable body to generate a driving force about a Y axis that is orthogonal to the optical axis and the X axis; and a roll correction magnetic drive mechanism that causes the movable body to rotate about the optical axis.

[0004] In the optical unit with a shake correction function described in Patent Literature 1, the fixed body has a square shape when viewed from the direction of the optical axis. Specifically, the fixed body has a square shape having two sides parallel to the X axis direction and two sides parallel to the Y axis direction when viewed from the direction of the optical axis. In the optical unit with a shake correction function, the first shake correction magnetic drive mechanism is disposed along one of the two sides of the fixed body parallel to the Y axis direction, the roll correction magnetic drive mechanism is disposed along the other of the two sides of the fixed body parallel to the Y axis direction, and the second shake correction magnetic drive mechanism is disposed along one of the two sides of the fixed body parallel to the X axis direction. That is, in the optical unit with a shake correction function, the first shake correction magnetic drive mechanism, the second shake correction magnetic drive mechanism, and the roll correction magnetic drive mechanism are disposed along three sides of the fixed body having a square shape when viewed from the direction of the optical axis.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent Application Publication No. 2021-28655 SUMMARY

[0008] In the optical unit with a shake correction function described in Patent Document 1, the first magnetic drive mechanism, the second magnetic drive mechanism, and the roll correction magnetic drive mechanism are arranged along three sides of the fixed body, and magnetic leakage can occur in regions along the three sides of the fixed body, respectively. Therefore, in a portable device or the like equipped with the optical unit with a shake correction function, various components need to be arranged in a manner that does not cause magnetic interference in the regions along the three sides of the fixed body, respectively, and the design freedom of the device can be reduced.

[0009] Therefore, an object of the present application is to provide an optical unit with a shake correction function that includes a movable body having a camera module, a first magnetic drive mechanism for rotating the movable body about an optical axis of the camera module as a center of rotation, and a second magnetic drive mechanism and a third magnetic drive mechanism for rotating the movable body to tilt the optical axis of the camera module in an arbitrary direction, in which the reduction in the design freedom of a portable device or the like equipped with the optical unit with a shake correction function can be suppressed compared to the related art.

[0010] To solve the above problem, the optical unit with a shake correction function of the present application is characterized by including a movable body having a camera module, a first intermediate member that holds the movable body so as to be rotatable, a second intermediate member that holds the first intermediate member so as to be rotatable, a fixed body that holds the second intermediate member so as to be rotatable, a first magnetic drive mechanism for rotating the movable body with respect to the fixed body about an optical axis of the camera module as a center of rotation, and a second magnetic drive mechanism and a third magnetic drive mechanism for rotating the movable body with respect to the fixed body in a manner that tilts the optical axis of the camera module in an arbitrary direction, the second magnetic drive mechanism including a second drive magnet and a second drive coil that are arranged opposite each other in a first optical axis orthogonal direction orthogonal to the optical axis of the camera module when the optical axis of the camera module is located at a prescribed reference position, the third magnetic drive mechanism including a third drive magnet and a third drive coil that are arranged opposite each other in a second optical axis orthogonal direction orthogonal to the optical axis of the camera module and the first optical axis orthogonal direction when the optical axis of the camera module is located at the reference position, the fixed body including an intermediate member holding portion that holds the second intermediate member so as to be rotatable, an outer shape of the intermediate member holding portion when viewed from an optical axis direction that is a direction of the optical axis of the camera module when the optical axis of the camera module is located at the reference position being a square or a rectangle, and the first magnetic drive mechanism, the second magnetic drive mechanism, and the third magnetic drive mechanism being arranged along two sides of the intermediate member holding portion whose outer shape when viewed from the optical axis direction is a square or a rectangle when the optical axis of the camera module is located at the reference position.

[0011] In the optical unit with shake correction function of the present application, the first magnetic drive mechanism, the second magnetic drive mechanism, and the third magnetic drive mechanism are arranged along both sides of the intermediate member holding portion, which has a square or rectangular shape when viewed from the optical axis direction of the camera module when the optical axis is located at a reference position. Therefore, in a portable device or the like equipped with the optical unit with shake correction function of the present application, various components can be arranged in a manner that does not generate magnetic interference in regions along both sides of the intermediate member holding portion. Therefore, in the present application, the reduction in design freedom of a portable device or the like equipped with the optical unit with shake correction function can be suppressed compared to the past.

[0012] In the present application, for example, the optical unit with shake correction function is provided with a flexible printed board led out from the movable body to one side in the direction orthogonal to the second optical axis, the first magnetic drive mechanism and the second magnetic drive mechanism are arranged along one side of the intermediate member holding portion in parallel with the direction orthogonal to the second optical axis, and the third magnetic drive mechanism is arranged along one side of the intermediate member holding portion in parallel with the direction orthogonal to the first optical axis.

[0013] In this case, the flexible printed board is led out from the movable body to one side in the direction orthogonal to the second optical axis, and therefore, the movable body is more difficult to turn with the direction orthogonal to the first optical axis as the axis of turning than when turned with the direction orthogonal to the second optical axis as the axis of turning under the influence of the flexible printed board. However, in this case, since only the third magnetic drive mechanism is arranged along one side of the intermediate member holding portion in parallel with the direction orthogonal to the first optical axis, the third drive magnet or the third drive coil constituting the third magnetic drive mechanism can be increased in size to increase the driving force of the third magnetic drive mechanism. Therefore, even if the movable body is difficult to turn with the direction orthogonal to the first optical axis as the axis of turning under the influence of the flexible printed board, the movable body can be appropriately turned with the direction orthogonal to the first optical axis as the axis of turning.

[0014] In the present application, it is preferable that the first magnetic drive mechanism be provided with two sets of first drive magnets and first drive coils arranged opposite each other in the direction orthogonal to the first optical axis, and the second magnetic drive mechanism be provided with one set of second drive magnets and second drive coils, the first drive magnets being arranged on both sides of the second drive magnets in the direction orthogonal to the second optical axis, and the first drive coils being arranged on both sides of the second drive coils in the direction orthogonal to the second optical axis.

[0015] If so configured, the optical unit with the shake correction function can be downsized in the second optical axis orthogonal direction, as compared with a case where the second driving magnets are arranged on both sides of the first driving magnets in the second optical axis orthogonal direction, and the second driving coils are arranged on both sides of the first driving coils in the second optical axis orthogonal direction. In addition, if so configured, the second driving magnets can be arranged at the center in the second optical axis orthogonal direction, and therefore, for example, in a case where the magnetic sensor for detecting the rotational position of the movable body with respect to the fixed body in the second optical axis orthogonal direction is arranged opposite the second driving magnets in the first optical axis orthogonal direction, the amount of shift in the optical axis direction of the second driving magnets and the magnetic sensor when the movable body is rotated with respect to the fixed body in the first optical axis orthogonal direction can be suppressed. Therefore, using the second driving magnets and the magnetic sensor, the rotational position of the movable body with respect to the fixed body in the second optical axis orthogonal direction can be appropriately detected.

[0016] In the present application, the optical unit with the shake correction function includes, for example, two magnetic sensors arranged opposite the two first driving magnets, respectively, and a control section electrically connected to the magnetic sensors, which detects the rotational position of the movable body with respect to the fixed body with the optical axis of the camera module as the center of rotation, based on the output signals of the two magnetic sensors.

[0017] If the first driving magnets are arranged on both sides of the second driving magnets in the second optical axis orthogonal direction, when the movable body is rotated to one side with the optical axis of the camera module as the center of rotation, one magnetic sensor approaches the first driving magnets and the other magnetic sensor moves away from the first driving magnets, and on the other hand, when the movable body is rotated to the other side with the optical axis of the camera module as the center of rotation, one magnetic sensor moves away from the first driving magnets and the other magnetic sensor approaches the first driving magnets. In addition, the distance between the magnetic sensor and the first driving magnets affects the output signal of the magnetic sensor.

[0018] Therefore, in a case where the first driving magnets are arranged on both sides of the second driving magnets in the second optical axis orthogonal direction, if the rotational position of the movable body with respect to the fixed body with the optical axis of the camera module as the center of rotation is detected based on only the output signal of one magnetic sensor, there is a possibility that the detection accuracy of the rotational position of the movable body with respect to the fixed body with the optical axis of the camera module as the center of rotation is reduced. In contrast, if the rotational position of the movable body with respect to the fixed body with the optical axis of the camera module as the center of rotation is detected based on the output signals of the two magnetic sensors, the rotational position of the movable body with respect to the fixed body with the optical axis of the camera module as the center of rotation can be appropriately detected.

[0019] In the present application, it is preferable that the first driving magnet be composed of two magnetized portions polarized in the second optical axis orthogonal direction, and the magnetic pole of the first driving magnet on the side of the second driving magnet be the same magnetic pole. If so configured, even if the first driving magnets are arranged on both sides of the second driving magnet in the second optical axis orthogonal direction, the balance of the magnetic force generated by the two first driving magnets with respect to the second driving magnet becomes better. Therefore, the influence of the first magnetic driving mechanism on the magnetic circuit of the second magnetic driving mechanism can be reduced.

[0020] In the present application, for example, the second magnetic driving mechanism can be arranged along one side of the intermediate member holding portion in the second optical axis orthogonal direction, the third magnetic driving mechanism can be arranged along one side of the intermediate member holding portion in the first optical axis orthogonal direction, and the first magnetic driving mechanism can be provided with: first driving magnets and first driving coils arranged opposite each other in the first optical axis orthogonal direction and arranged along one side of the intermediate member holding portion in the second optical axis orthogonal direction; and first driving magnets and first driving coils arranged opposite each other in the second optical axis orthogonal direction and arranged along one side of the intermediate member holding portion in the first optical axis orthogonal direction.

[0021] For example, in the case where two first driving magnets and two first driving coils are arranged along one side of the intermediate member holding portion in the second optical axis orthogonal direction, the second driving magnets and the second driving coils arranged along one side of the intermediate member holding portion in the second optical axis orthogonal direction are smaller than the third driving magnets and the third driving coils arranged along one side of the intermediate member holding portion in the first optical axis orthogonal direction, and it is possible that a difference occurs between the driving force of the second magnetic driving mechanism and the driving force of the third magnetic driving mechanism.

[0022] On the contrary, in the case where the first magnetic driving mechanism is provided with first driving magnets and first driving coils arranged along one side of the intermediate member holding portion in the second optical axis orthogonal direction, and first driving magnets and first driving coils arranged along one side of the intermediate member holding portion in the first optical axis orthogonal direction, it is possible to make the second driving magnets and the second driving coils and the third driving magnets and the third driving coils the same size. Therefore, it is possible to make the driving force of the second magnetic driving mechanism equal to the driving force of the third magnetic driving mechanism.

[0023] In the present application, when the side of the movable body in the direction of rotation with the optical axis of the camera module as the center of rotation is set as the first direction of rotation side, and the side opposite to the first direction of rotation side is set as the second direction of rotation side, the first driving magnet and the first driving coil arranged along one side of the intermediate member holding portion in the direction orthogonal to the second optical axis are arranged on the first direction of rotation side of the second magnetic driving mechanism, and the first driving magnet and the first driving coil arranged along one side of the intermediate member holding portion in the direction orthogonal to the first optical axis are arranged on the second direction of rotation side of the third magnetic driving mechanism.

[0024] If so configured, when the movable body rotates to the second direction of rotation side, the first driving magnet and the first driving coil arranged along one side of the intermediate member holding portion in the direction orthogonal to the second optical axis can be brought close to each other, and on the other hand, the first driving magnet and the first driving coil arranged along one side of the intermediate member holding portion in the direction orthogonal to the first optical axis can be brought away from each other. In addition, when the movable body rotates to the first direction of rotation side, the first driving magnet and the first driving coil arranged along one side of the intermediate member holding portion in the direction orthogonal to the second optical axis can be brought away from each other, and on the other hand, the first driving magnet and the first driving coil arranged along one side of the intermediate member holding portion in the direction orthogonal to the first optical axis can be brought close to each other. Thus, the deviation of the driving force of the first magnetic driving mechanism when the movable body rotates to the first direction of rotation side and the driving force of the first magnetic driving mechanism when the movable body rotates to the second direction of rotation side can be suppressed. As a result, the rotational movement of the movable body relative to the fixed body can be stabilized.

[0025] Effects of the Invention

[0026] As described above, in the present application, compared with the past, the reduction in the design freedom of a portable device or the like equipped with an optical unit with a shake correction function, which has a movable body, a first magnetic driving mechanism for rotating the movable body with the optical axis of a camera module as the center of rotation, and a second magnetic driving mechanism and a third magnetic driving mechanism for rotating the movable body to tilt the optical axis of the camera module in an arbitrary direction, can be suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective view of an optical unit with a shake correction function according to an embodiment of the present application.

[0028] Figure 2 is a plan view of the optical unit with a shake correction function shown in Figure 1

[0029] Figure 3 is an exploded perspective view of the optical unit with a shake correction function shown in Figure 1 ​​

[0030] Figure 4 yes Figure 3 An exploded perspective view of the second intermediate component, the second fulcrum, etc. shown.

[0031] Figure 5 yes Figure 4 An exploded perspective view of the cage, the first intermediate component, and the first fulcrum, etc.

[0032] Figure 6 It is Figure 2 The cage, first magnetic drive mechanism, second magnetic drive mechanism and third magnetic drive mechanism shown are shown in a top view.

[0033] Figure 7 It is Figure 6 The front view shown is illustrated with the first and second drive coils extracted.

[0034] Figure 8 It is used for explanation Figure 6 The diagram shows the configuration of the first driving magnet and the second driving magnet.

[0035] Figure 9 It is used for explanation Figure 2 The diagram shows a top view of the configuration of the first driving magnet and the magnetic sensor when the movable body rotates relative to the fixed body with the optical axis of the camera module as the rotation center.

[0036] Figure 10 It is used for explanation Figure 9 The diagram shows an example of the output signal of a magnetic sensor.

[0037] Figure 11 This is a top view illustrating the configuration of the first magnetic drive mechanism according to another embodiment of the present invention.

[0038] Figure 12 It is used for explanation Figure 11 The top view of the first magnetic drive mechanism when the cage rotates around the optical axis of the camera module. Detailed Implementation

[0039] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0040] (Overall structure of the optical unit with jitter correction function)

[0041] Figure 1 This is a perspective view of the optical unit 1 with jitter correction function according to an embodiment of the present invention. Figure 2 yes Figure 1 The top view of the optical unit 1 with jitter correction function shown. Figure 3 yes Figure 1An exploded perspective view of the optical unit 1 with jitter correction function shown. Figure 4 yes Figure 3 An exploded perspective view of the second intermediate component 5 and the second fulcrum part 13, etc. Figure 5 yes Figure 4 An exploded perspective view of the cage 16, the first intermediate component 4, and the first fulcrum 12, etc. Figure 6 It is Figure 2 The top view showing the cage 16, the first magnetic drive mechanism 7, the second magnetic drive mechanism 8, and the third magnetic drive mechanism 9, etc., is shown after extraction.

[0042] In the following explanation, such as Figure 1 As shown, the three mutually orthogonal directions are designated as the X, Y, and Z directions, respectively. The X direction is designated as the left-right direction, the Y direction as the front-back direction, and the Z direction as the up-down direction. Additionally, one side of the left-right direction... Figure 1 The X1 direction side is set as the "right" side, and its opposite side is... Figure 1 The X2 direction side is set as the "left" side, and the front-back direction side is... Figure 1 The Y1 direction side is designated as the "front" side, and its opposite side is... Figure 1 The Y2 direction side is set as the "back" side, and the vertical side is... Figure 1 The Z1 direction side is designated as the "up" side, and its opposite side is... Figure 1 The Z2 direction side is set as the "down" side.

[0043] The optical unit 1 with shake correction function in this embodiment (hereinafter referred to as "optical unit 1") is, for example, a small and thin unit installed in a portable device such as a smartphone, and includes a camera module 2 with a lens and an image sensor for photography. The optical unit 1 is generally formed into a thin, flat, roughly rectangular shape. In addition, the optical unit 1 has a shake correction function to avoid distortion in the photographed image when shake occurs during photography.

[0044] The optical unit 1 includes: a movable body 3 having a camera module 2; a first intermediate component 4 rotatably holding the movable body 3; a second intermediate component 5 rotatably holding the first intermediate component 4; and a fixed body 6 rotatably holding the second intermediate component 5. The movable body 3 is capable of rotating relative to the first intermediate component 4 about the optical axis L of the camera module 2 as the rotation center.

[0045] The first intermediate component 4 can be positioned in a first direction orthogonal to the optical axis L of the camera module 2. Figure 2 The first intermediate component 4 can rotate relative to the second intermediate component 5 with the first axis L1 (refer to the first axis L1) taking the first direction as the axis of rotation. Figure 2) is the rotation center with respect to the second intermediate member 5. The second intermediate member 5 is rotatable with respect to the fixed body 6 with the second direction (W direction of the camera module 2) as the rotation axis. That is, the second intermediate member 5 is rotatable with respect to the fixed body 6 with the second axis L2 (refer to FIG. 2) as the rotation center, the second axis L2 having the second direction as the axis direction. In this way, a 2-axis gimbal mechanism is configured between the movable body 3 and the fixed body 6. Figure 2 Figure 2

[0046] In the present embodiment, when the first intermediate member 4 and the second intermediate member 5 are disposed at the prescribed reference positions and the optical axis L of the camera module 2 is located at the prescribed reference position, the direction of the optical axis L of the camera module 2, i.e., the optical axis direction, coincides with the up-down direction. The front-rear direction (Y direction) of the present embodiment is a first optical axis orthogonal direction orthogonal to the optical axis L of the camera module 2 when the optical axis L of the camera module 2 is located at the reference position. In addition, the left-right direction (X direction) is a second optical axis orthogonal direction orthogonal to the front-rear direction as the first optical axis orthogonal direction and the optical axis L of the camera module 2 when the optical axis L of the camera module 2 is located at the reference position.

[0047] In addition, when the first intermediate member 4 is disposed at the prescribed reference position, the second direction is orthogonal to the optical axis L. That is, when the first intermediate member 4 is disposed at the prescribed reference position and does not rotate with respect to the second intermediate member 5, the second direction is orthogonal to the optical axis L. On the other hand, when the first intermediate member 4 rotates with respect to the second intermediate member 5, the second direction intersects the optical axis L, but does not intersect at a right angle. When viewed from the upper side, the first direction is a direction that is offset by about 45° in the counterclockwise direction with respect to the front-rear direction. Figure 2

[0048] The optical unit 1 includes a first magnetic drive mechanism 7 for rotating the movable body 3 with respect to the fixed body 6 with the optical axis L of the camera module 2 as the rotation center, and a second magnetic drive mechanism 8 and a third magnetic drive mechanism 9 for rotating the movable body 3 with respect to the fixed body 6 to tilt the optical axis L of the camera module 2 in an arbitrary direction. First fulcrum portions 12 that become fulcrums of rotation of the first intermediate member 4 with respect to the second intermediate member 5 are disposed at both ends of the first intermediate member 4 in the first direction. Second fulcrum portions 13 that become fulcrums of rotation of the second intermediate member 5 with respect to the fixed body 6 are disposed at both ends of the second intermediate member 5 in the second direction. A rotation support portion 14 for enabling the movable body 3 to rotate with respect to the first intermediate member 4 is disposed between the movable body 3 and the first intermediate member 4.

[0049] ​​​The movable body 3 is generally formed as a thin, flat cuboid along the optical axis. The movable body 3 includes: a holder 16 for fixing the camera module 2; and a rotating component 17 fixed to the holder 16. The holder 16 is formed of resin material. The holder 16 is formed as a square frame, and its shape is square when viewed from the optical axis with the first intermediate component 4 and the second intermediate component 5 positioned at predetermined reference positions. The camera module 2 is fixed to the inner peripheral surface of the holder 16 such that the holder 16 covers the outer peripheral side of the camera module 2.

[0050] Furthermore, when the movable body 3, the first intermediate component 4, and the second intermediate component 5 are positioned at a predetermined reference position, two of the four sides of the square-shaped retainer 16 are parallel to the front-rear direction, and the remaining two sides of the retainer 16 are parallel to the left-right direction. Additionally, the two ends of the retainer 16 in the first direction are chamfered to form planes approximately orthogonal to the first direction. Similarly, the two ends of the retainer 16 in the second direction are chamfered to form planes approximately orthogonal to the second direction.

[0051] like Figure 6 As shown, recesses 16a and 16b are formed on the rear side of the retainer 16. Recess 16a is configured with a first drive magnet 35 (described later), which forms part of the first magnetic drive mechanism 7, and recess 16b is configured with a second drive magnet 37 (described later), which forms part of the second magnetic drive mechanism 8. Recess 16c is formed on the left side of the retainer 16, and recess 16c is configured with a third drive magnet 39 (described later), which forms part of the third magnetic drive mechanism 9.

[0052] The rotating component 17 is made of a metal material such as stainless steel. Furthermore, the rotating component 17 is formed by bending a metal plate into a predetermined shape. The rotating component 17 includes: a mounted portion 17a placed on the rotating support portion 14; and a fixed portion 17b fixed to the retainer 16. The mounted portion 17a is formed in an annular shape. Additionally, the mounted portion 17a is formed in a generally flat plate shape. The thickness direction of the mounted portion 17a is aligned with the optical axis direction.

[0053] The mounting portion 17a is disposed on the upper side of the holder 16. An annular groove (not shown) is formed on the lower surface of the mounting portion 17a, and a sphere 31 (described later) forming part of the rotating support portion 14 is disposed in this groove. This groove is recessed upwards. Furthermore, this groove is 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 disposed on the inner circumference of the mounting portion 17a.

[0054] The fixed portion 17b is connected to the outer peripheral surface of the mounted portion 17a. In this embodiment, the fixed portions 17b are connected to both sides of the outer peripheral surface of the mounted portion 17a in the front-back and left-right directions, and the four fixed portions 17b are arranged at 90° intervals around the optical axis L. The front end of the fixed portion 17b is bent downward. The front end of the fixed portion 17b is fixed to the retainer 16. In addition, a flat plate-shaped protrusion 17c is connected to the outer peripheral surface of the mounted portion 17a. The protrusion 17c protrudes from the mounted portion 17a to both sides in the second direction. The thickness direction of the protrusion 17c is consistent with the optical axis direction.

[0055] As described above, the camera module 2 includes a lens and an image sensor. The image sensor is positioned at the lower end of the camera module 2, and the camera module 2 captures images of a subject positioned above the camera module 2. A flexible printed circuit board 18 extends from the lower end of the camera module 2. The flexible printed circuit board 18 extends to the right from the camera module 2. That is, the optical unit 1 includes a flexible printed circuit board 18 extending to the right from the movable body 3.

[0056] The first intermediate component 4 is formed of a metal material such as stainless steel. Furthermore, the first intermediate component 4 is formed by bending a metal plate into a predetermined shape. The first intermediate component 4 includes: a mounting portion 4a for mounting the rotating support portion 14; and two arm portions 4b extending from the mounting portion 4a to both sides in a first direction. The mounting portion 4a is formed in an annular shape. Additionally, the mounting portion 4a is formed in a generally flat plate shape. The thickness direction of the mounting portion 4a is aligned with the optical axis direction.

[0057] The mounting portion 4a is disposed on the upper side of the holder 16. Additionally, the mounting portion 4a is disposed on the lower side of the mounted portion 17a of the rotating member 17. Figure 5 As shown, an annular groove 4c is formed on the upper surface of the mounting portion 4a, and a portion of a sphere 31 (described later) that forms part of the rotating support portion 14 is disposed in the groove 4c. The groove 4c is recessed downwards. Furthermore, the groove 4c is 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 disposed on the inner circumference side of the mounting portion 4a.

[0058] Arm 4b is connected to the outer peripheral surface of mounting portion 4a. The front end of arm 4b is bent downwards. The front end portion 4d of arm 4b is formed into a flat plate. The thickness direction of the front end portion 4d is approximately the same as that of the first direction. The front end portion 4d is positioned on the outer side of the retainer 16 in the first direction. In addition, a magnet mounting portion 4e is connected to the outer peripheral surface of mounting portion 4a. The magnet mounting portion 4e protrudes from mounting portion 4a to both sides in the second direction.

[0059] A magnet 19 is mounted on the upper surface of the magnet mounting part 4e (see reference). Figure 5Magnet 19 is disposed below the protrusion 17c of the rotating member 17. Magnet 19 magnetically attracts the protrusion 17c. Magnet 19 is magnetized into two poles in the circumferential direction of the mounting portion 4a, which is formed in a ring shape. That is, magnet 19 is composed of two magnetized portions that are polarized in the circumferential direction of the mounting portion 4a.

[0060] The second intermediate component 5 is made of a metal material such as stainless steel. Furthermore, the second intermediate component 5 is a leaf spring formed by bending a flexible metal plate into a predetermined shape. The second intermediate component 5 consists of a base 5a disposed on the upper side of the rotating component 17 and the first intermediate component 4, two arms 5b extending from the base 5a to both sides in a first direction, and two arms 5c extending from the base 5a to both sides in a second direction. A circular through hole is formed at the center of the base 5a. The upper end of the camera module 2 is disposed on the inner periphery of the base 5a.

[0061] The front end of arm 5b is bent downwards. The front end portion 5d of arm 5b is formed into a flat plate. The thickness direction of the front end portion 5d is approximately aligned with the first direction. The front end portion 5d is positioned outside the front end portion 4d of arm 4b in the first direction. The front end portion 5c is bent downwards. The front end portion 5e of arm 5c is formed into a flat plate. The thickness direction of the front end portion 5e is approximately aligned with the second direction. The front end portion 5e is positioned outside the magnet mounting portion 4e in the second direction.

[0062] like Figure 4 As shown, a recess 5f is formed at the front end portion 5d, and this recess 5f is configured as part of the sphere 27 (described later), which forms part of the first fulcrum portion 12. The recess 5f is hemispherical. The recess 5f is recessed inward toward the first direction. A recess 5g is formed at the front end portion 5e, and this recess 5g is configured as part of the sphere 29 (described later), which forms part of the second fulcrum portion 13. The recess 5g is hemispherical. The recess 5g is recessed inward toward the second direction.

[0063] The fixing body 6 includes: a housing 21 having a quadrangular cylindrical intermediate component holding portion 21a that rotatably holds the second intermediate component 5; a cover 22 fixed to the upper surface of the housing 21; and a base plate 23 fixed to the lower surface of the housing 21. The housing 21 is formed of resin material. The housing 21 is composed of the aforementioned intermediate component holding portion 21a and a quadrangular cylindrical FPC receiving portion 21b that houses the flexible printed circuit board 18 on its inner peripheral side.

[0064] like Figure 3As shown, the intermediate component holding part 21a is formed as a four-cornered cylindrical shape with openings at both ends in the vertical direction. The intermediate component holding part 21a is arranged radially around the optical axis L, outside the movable body 3, the first intermediate component 4, and the second intermediate component 5. The intermediate component holding part 21a has a square shape. More specifically, the intermediate component holding part 21a has a square shape when viewed from the vertical direction. That is, when the first intermediate component 4 and the second intermediate component 5 are positioned at a predetermined reference position and the optical axis L of the camera module 2 is located at a predetermined reference position, the intermediate component holding part 21a has a square shape when viewed from the optical axis direction of the camera module 2.

[0065] Two of the four sides of the square-shaped middle component holding portion 21a are parallel to the front-back direction, and the remaining two sides are parallel to the left-right direction. On the rear surface of the middle component holding portion 21a, a through hole 21c is formed for the first drive coil 36 (described later), which forms part of the first magnetic drive mechanism 7, and the second drive coil 38 (described later), which forms part of the second magnetic drive mechanism 8. Figure 3 A through hole 21d is formed on the left surface of the intermediate component holding part 21a, for which a third drive coil 40, which constitutes part of the third magnetic drive mechanism 9 (described later), is disposed (see reference). Figure 3 ).

[0066] The FPC storage section 21b is formed as a four-cornered cylindrical shape with openings at both ends in the vertical direction. The FPC storage section 21b is connected to the right side of the intermediate component holding section 21a. The cover 22 covers the housing 21 from the top. Through holes are formed in the cover 22 for placing the second intermediate component 5, etc. The bottom plate 23 blocks the openings on the lower surface of the housing 21 (i.e., the openings on the lower surfaces of the intermediate component holding section 21a and the FPC storage section 21b).

[0067] The first fulcrum 12 includes: a support member 26 fixed to the front end 4d of the arm 4b of the first intermediate member 4; and a spherical sphere 27 fixed to the support member 26 (see reference). Figure 5 The support member 26 and the ball 27 are made of metal. The support member 26 has a flat fixing portion 26a for fixing the ball 27. The thickness direction of the fixing portion 26a is aligned with the first direction. The ball 27 is fixed to the inner side of the fixing portion 26a in the first direction. The fixing portion 26a is disposed on the outer side of the front end portion 4d in the first direction. The front end portion 5d of the arm portion 5b of the second intermediate member 5 is disposed between the front end portion 4d and the fixing portion 26a in the first direction. A portion of the ball 27 is disposed in the recess 5f. Due to the elasticity of the arm portion 5b, the ball 27 contacts the bottom surface of the recess 5f with a predetermined contact pressure.

[0068] The second fulcrum portion 13 includes a support member 28 fixed to the intermediate member holding portion 21a, and a spherical ball 29 fixed to the support member 28 (see Figure 4 ). The support member 28 and the ball 29 are formed of a metal material. The support member 28 includes a flat plate-shaped fixing portion 28a that fixes the ball 29. The thickness direction of the fixing portion 28a coincides with the second direction. The ball 29 is fixed to the inner side surface of the fixing portion 28a in the second direction. The fixing portion 28a is disposed outside the front end portion 5e of the arm portion 5c of the second intermediate member 5 in the second direction. A part of the ball 29 is disposed in the recessed portion 5g. Due to the elasticity of the arm portion 5c, the ball 29 is in contact with the bottom surface of the recessed portion 5g at a prescribed contact pressure.

[0069] The rotation support portion 14 includes a ball holding member 30 formed in a flat plate shape and a circular ring shape, and a plurality of balls 31 in a spherical shape held to the ball holding member 30 (see Figure 5 ). The rotation support portion 14 of the present embodiment includes six balls 31. The ball holding member 30 and the balls 31 are formed of a metal material. The ball holding member 30 is disposed so that the thickness direction of the ball holding member 30 coincides with the optical axis direction. In addition, the ball holding member 30 is disposed so that the center of the ball holding member 30 coincides with the optical axis L. The ball holding member 30 is disposed between the placed portion 17a and the placement portion 4a in the optical axis direction.

[0070] A plurality of (specifically, six) through holes for holding the balls 31 are formed in the ball holding member 30. The six through holes are formed in the ball holding member 30 at an equiangular angle interval with the optical axis L of the camera module 2 as the center. A part of the balls 31 held in the through holes of the ball holding member 30 is disposed in the groove portion formed in the lower surface of the placed portion 17a and the groove portion 4c formed in the upper surface of the placement portion 4a.

[0071] The balls 31 are in contact with the bottom surface of the groove portion of the placed portion 17a and the bottom surface of the groove portion 4c of the placement portion 4a at a prescribed contact pressure by the magnetic attractive force generated between the magnet 19 and the protrusion portion 17c. In addition, as described above, the magnet 19 is magnetized into two poles in the circumferential direction of the placement portion 4a formed in a circular ring shape, and the magnet 19 and the protrusion portion 17c function to hold the movable body 3 at a prescribed reference position in the rotation direction of the movable body 3 with the optical axis L of the camera module 2 as the center. Specifically, the magnet 19 and the protrusion portion 17c function to hold the movable body 3 at a prescribed reference position in the rotation direction of the movable body 3 with the optical axis L as the center when no current is supplied to the first driving coil 36 that constitutes a part of the first magnetic driving mechanism 7.

[0072] In the optical unit 1, when a change in the inclination of the movable body 3 is detected by a prescribed detection mechanism for detecting the change in the inclination of the movable body 3, a current is supplied to at least any one of the first drive coil 36 described later that constitutes a part of the first magnetic drive mechanism 7, the second drive coil 38 described later that constitutes a part of the second magnetic drive mechanism 8, and the third drive coil 40 described later that constitutes a part of the third magnetic drive mechanism 9, on the basis of the detection result of the detection mechanism, so that the shake is corrected.

[0073] (Structure of first to third magnetic drive mechanisms and their peripheral portions)

[0074] Figure 7 is a front view that extracts and shows the first drive coil 36 and the second drive coil 38 shown in FIG. 1. Figure 6 is a front view that extracts and shows the first drive coil 36 and the second drive coil 38 shown in FIG. 1. Figure 8 is a plan view for explaining the configuration of the first drive magnet 35 and the second drive magnet 37 shown in FIG. 1. Figure 6 is a plan view for explaining the configuration of the first drive magnet 35 and the second drive magnet 37 shown in FIG. 1. Figure 9 is a plan view for explaining the configuration relationship between the first drive magnet 35 and the magnetic sensor 43 when the movable body 3 shown in FIG. 1 rotates with respect to the fixed body 6 with the optical axis L of the camera module 2 as the center of rotation. Figure 2 is a plan view for explaining the configuration relationship between the first drive magnet 35 and the magnetic sensor 43 when the movable body 3 shown in FIG. 1 rotates with respect to the fixed body 6 with the optical axis L of the camera module 2 as the center of rotation. Figure 10 is a plan view for explaining the configuration relationship between the first drive magnet 35 and the magnetic sensor 43 when the movable body 3 shown in FIG. 1 rotates with respect to the fixed body 6 with the optical axis L of the camera module 2 as the center of rotation. Figure 9 is a graph showing an example of the output signals SG1, SG2 of the magnetic sensor 43 shown in FIG. 1.

[0075] The first magnetic drive mechanism 7 has the first drive magnet 35 and the first drive coil 36 that are arranged opposite to each other in the front-rear direction. The first magnetic drive mechanism 7 of the present embodiment has two sets of the first drive magnet 35 and the first drive coil 36. That is, the first magnetic drive mechanism 7 has two first drive magnets 35 and two first drive coils 36. The second magnetic drive mechanism 8 has the second drive magnet 37 and the second drive coil 38 that are arranged opposite to each other in the front-rear direction. The second magnetic drive mechanism 8 of the present embodiment has one set of the second drive magnet 37 and the second drive coil 38. The third magnetic drive mechanism 9 has the third drive magnet 39 and the third drive coil 40 that are arranged opposite to each other in the left-right direction. The third magnetic drive mechanism 9 of the present embodiment has one set of the third drive magnet 39 and the third drive coil 40.

[0076] The second drive magnet 37 is formed in a rectangular plate shape. The second drive magnet 37 is fixed to the recessed portion 16b of the holder 16. That is, the second drive magnet 37 is fixed to the rear surface side of the holder 16. In addition, the second drive magnet 37 is fixed to the center portion in the left-right direction of the holder 16 when the movable body 3, the first intermediate member 4, and the second intermediate member 5 are arranged at prescribed reference positions.

[0077] When the movable body 3, the first intermediate member 4, and the second intermediate member 5 are arranged at the prescribed reference position, the thickness direction of the second driving magnet 37 coincides with the front-rear direction. In addition, two of the four sides of the second driving magnet 37, which is formed in a rectangular flat plate shape, are parallel to the optical axis direction of the camera module 2. The second driving magnet 37 is magnetized into two poles in the up-down direction. That is, the second driving magnet 37 is composed of two magnetization portions 37a, 37b polarized in the up-down direction (refer to Figure 8 ).

[0078] The second driving coil 38 is, for example, a coreless coil formed by winding a wire in a coreless shape. The second driving coil 38 is composed of two straight line portions 38a in a straight line shape parallel to the left-right direction and two circular arc portions 38b in a circular arc shape connecting both ends of the left-right direction of the two straight line portions 38a (refer to Figure 7 ). The second driving coil 38 is mounted on a flexible printed substrate 42 (refer to Figure 4 ). The flexible printed substrate 42 is fixed to the outer peripheral surface of the intermediate member holding portion 21a.

[0079] The second driving coil 38 is arranged in the through hole 21c of the intermediate member holding portion 21a. That is, the second driving coil 38 is arranged in the rear side portion of the intermediate member holding portion 21a, and is arranged at the rear side of the second driving magnet 37. In addition, the second driving coil 38 is arranged at the center portion of the left-right direction of the intermediate member holding portion 21a. The second magnetic driving mechanism 8 rotates the movable body 3 with respect to the fixed body 6 with an axis orthogonal to the optical axis L of the camera module 2 and parallel to the left-right direction as a rotation center.

[0080] The third driving magnet 39 is formed in a rectangular flat plate shape. The third driving magnet 39 is fixed to the recessed portion 16c of the holder 16. That is, the third driving magnet 39 is fixed to the left surface side of the holder 16. In addition, the third driving magnet 39 is fixed to the center portion of the front-rear direction of the holder 16 when the movable body 3, the first intermediate member 4, and the second intermediate member 5 are arranged at the prescribed reference position.

[0081] When the movable body 3, the first intermediate member 4, and the second intermediate member 5 are arranged at the prescribed reference position, the thickness direction of the third driving magnet 39 coincides with the left-right direction. In addition, two of the four sides of the third driving magnet 39, which is formed in a rectangular flat plate shape, are parallel to the optical axis direction of the camera module 2. As with the second driving magnet 37, the third driving magnet 39 is magnetized into two poles in the up-down direction. That is, the third driving magnet 39 is composed of two magnetization portions polarized in the up-down direction. The width of the optical axis direction of the third driving magnet 39 is equal to the width of the optical axis direction of the second driving magnet 37. The width of the front-rear direction of the third driving magnet 39 is wider than the width of the left-right direction of the second driving magnet 37.

[0082] The third drive coil 40 is, for example, a coreless coil formed by winding a wire into a coreless shape. The third drive coil 40 is composed of two straight line portions in a straight line shape parallel to the front-rear direction and two arc portions in an arc shape connecting both ends of the front-rear direction of the two straight line portions. The third drive coil 40 is mounted on the flexible printed board 42. The width of the third drive coil 40 in the optical axis direction is equal to the width of the second drive coil 38 in the optical axis direction. The width of the third drive coil 40 in the front-rear direction is wider than the width of the second drive coil 38 in the left-right direction.

[0083] The third drive coil 40 is disposed in the through hole 21d of the middle member holding portion 21a. That is, the third drive coil 40 is disposed in the left side portion of the middle member holding portion 21a, on the left side of the third drive magnet 39. In addition, the third drive coil 40 is disposed at the center portion in the front-rear direction of the middle member holding portion 21a. The third magnetic drive mechanism 9 rotates the movable body 3 with respect to the fixed body 6 about an axis orthogonal to the optical axis L of the camera module 2 and parallel to the front-rear direction as a rotation center.

[0084] The first drive magnet 35 is formed in a rectangular flat plate shape. The first drive magnet 35 is fixed to the recessed portion 16a of the holder 16. That is, the first drive magnet 35 is fixed to the rear surface side of the holder 16. When the movable body 3, the first middle member 4, and the second middle member 5 are disposed at a prescribed reference position, the thickness direction of the first drive magnet 35 coincides with the front-rear direction. In addition, two of the four sides of the first drive magnet 35 formed in a rectangular flat plate shape are parallel to the optical axis direction of the camera module 2. The first drive magnet 35 is disposed on both sides in the left-right direction of the second drive magnet 37.

[0085] The first drive magnet 35 is magnetized into two poles in the left-right direction. That is, the first drive magnet 35 is composed of two magnetization portions 35a, 35b polarized in the left-right direction (see FIG. 6). In the present embodiment, the magnetic poles of the second drive magnet 37 side of the two first drive magnets 35 are the same magnetic poles. That is, the magnetic pole on the right side of the first drive magnet 35 disposed on the left side of the second drive magnet 37 and the magnetic pole on the left side of the first drive magnet 35 disposed on the right side of the second drive magnet 37 are the same magnetic poles. Figure 8

[0086] ​In the following description, in the case of distinguishing the first driving magnet 35 disposed on the left side of the second driving magnet 37 and the first driving magnet 35 disposed on the right side of the second driving magnet 37, the first driving magnet 35 disposed on the left side of the second driving magnet 37 is set as "first driving magnet 35A", and the first driving magnet 35 disposed on the right side of the second driving magnet 37 is set as "first driving magnet 35B".

[0087] The first driving coil 36 is, for example, a coreless coil formed by winding a wire in a coreless shape. The first driving coil 36 is composed of two straight line portions 36a in a straight line shape parallel to the optical axis direction and two circular arc portions 36b in a circular arc shape connecting both ends of the optical axis direction of the two straight line portions 36a (see FIG. 6). Figure 7 ) As described above, in the present embodiment, since the magnetic pole on the right side of the first driving magnet 35A and the magnetic pole on the left side of the first driving magnet 35B are the same magnetic pole, the winding direction of one of the two first driving coils 36 is in the opposite direction to the winding direction of the other first driving coil 36.

[0088] The first driving coil 36 is mounted on the flexible printed board 42. The first driving coil 36 is disposed in the through hole 21c of the intermediate member holding portion 21a. That is, the first driving coil 36 is disposed in the rear side portion of the intermediate member holding portion 21a, and is disposed on the rear side of the first driving magnet 35. In addition, the first driving coil 36 is disposed on both sides in the left-right direction of the second driving coil 38.

[0089] As described above, the first driving magnet 35 and the second driving magnet 37 are fixed on the rear surface side of the holder 16, and the first driving coil 36 and the second driving coil 38 are disposed in the rear side portion of the intermediate member holding portion 21a. In addition, the third driving magnet 39 is fixed on the left surface side of the holder 16, and the third driving coil 40 is disposed in the left side portion of the intermediate member holding portion 21a.

[0090] That is, the first magnetic driving mechanism 7 and the second magnetic driving mechanism 8 are disposed along one side (specifically, the rear side) of the intermediate member holding portion 21a in parallel with the left-right direction, and the third magnetic driving mechanism 9 is disposed along one side (specifically, the left side) of the intermediate member holding portion 21a in parallel with the front-rear direction. That is, the first magnetic driving mechanism 7, the second magnetic driving mechanism 8, and the third magnetic driving mechanism 9 are disposed along both sides of the intermediate member holding portion 21a whose outer shape is a square when viewed from the up-down direction.

[0091] The magnetic sensor 43 is arranged opposite to the first driving magnet 35, and detects a rotational position of the movable body 3 relative to the fixed body 6 with the optical axis L of the camera module 2 as a rotational center. The magnetic sensor 44 is arranged opposite to the second driving magnet 37, and detects a rotational position of the movable body 3 relative to the fixed body 6 with an axis orthogonal to the optical axis L of the camera module 2 and parallel to the left-right direction as a rotational center. The magnetic sensor 45 is arranged opposite to the third driving magnet 39, and detects a rotational position of the movable body 3 relative to the fixed body 6 with an axis orthogonal to the optical axis L of the camera module 2 and parallel to the front-rear direction as a rotational center.

[0092] The magnetic sensors 43 to 45 are Hall sensors having Hall elements. The magnetic sensors 43 to 45 are mounted on the flexible printed board 42. The magnetic sensors 43 to 45 are electrically connected to a control section 47 (refer to Figure 8 ) of the optical unit 1. That is, the optical unit 1 is provided with the control section 47 electrically connected to the magnetic sensors 43 to 45. The output signals of the magnetic sensors 43 to 45 are input to the control section 47, and the control section 47 detects the rotational position of the movable body 3 based on the output signals of the magnetic sensors 43 to 45.

[0093] The magnetic sensor 44 is arranged on the inner periphery side of the second driving coil 38 serving as an air core coil. In addition, the magnetic sensor 44 is arranged on the axis of the rotational center axis of the movable body 3 that rotates by the driving force of the third magnetic driving mechanism 9 (i.e., on the axis orthogonal to the optical axis L and parallel to the front-rear direction). The magnetic sensor 45 is arranged on the inner periphery side of the third driving coil 40 serving as an air core coil. In addition, the magnetic sensor 45 is arranged on the axis of the rotational center axis of the movable body 3 that rotates by the driving force of the second magnetic driving mechanism 8 (i.e., on the axis orthogonal to the optical axis L and parallel to the left-right direction).

[0094] The magnetic sensor 43 is arranged on the inner periphery side of the first driving coil 36 serving as an air core coil. The magnetic sensor 43 is arranged opposite to the two first driving magnets 35, respectively. That is, the optical unit 1 is provided with two magnetic sensors 43 arranged opposite to the two first driving magnets 35, respectively. In the following description, in the case of distinguishing the magnetic sensor 43 arranged opposite to the first driving magnet 35A and the magnetic sensor 43 arranged opposite to the first driving magnet 35B, the magnetic sensor 43 arranged opposite to the first driving magnet 35A is set as "magnetic sensor 43A", and the magnetic sensor 43 arranged opposite to the first driving magnet 35B is set as "magnetic sensor 43B".

[0095] If the clockwise direction of the Figure 2 is set as the clockwise direction, the counterclockwise direction of the Figure 2If the counterclockwise direction is set as the counterclockwise direction (that is, if the clockwise direction when viewed from above is set as the clockwise direction, and the counterclockwise direction when viewed from above is set as the counterclockwise direction), then when the movable body 3 rotates clockwise about the optical axis L from its position at the specified reference position, if... Figure 9 As shown in (A), the distance between the first driving magnet 35A and the magnetic sensor 43A is close, but the distance between the first driving magnet 35B and the magnetic sensor 43B is far. On the other hand, when the movable body 3 rotates counterclockwise about the optical axis L, as... Figure 9 As shown in (B), the distance between the first driving magnet 35A and the magnetic sensor 43A is far, but the distance between the first driving magnet 35B and the magnetic sensor 43B is close.

[0096] In this embodiment, the right magnetic pole of the first driving magnet 35A and the left magnetic pole of the first driving magnet 35B are the same. Furthermore, the distance between the first driving magnet 35A and the magnetic sensor 43 affects the output signal of the magnetic sensor 43. Therefore, if the rotation angle of the movable body 3 when it rotates clockwise from the reference position around the optical axis L is set as a positive angle, and the rotation angle of the movable body 3 when it rotates counterclockwise from the reference position around the optical axis L is set as a negative angle, then the output signal SG1 of the magnetic sensor 43A and the output signal SG2 of the magnetic sensor 43B are determined by the rotation angle of the movable body 3 from the reference position (0°), for example... Figure 10 The output signals SG1 and SG2 do not change as shown. That is, the output signals SG1 and SG2 do not change linearly according to the rotation angle of the movable body 3 from the reference position.

[0097] Therefore, when the control unit 47 uses only the output signal SG1 or the output signal SG2 to detect the rotational position of the movable body 3 relative to the fixed body 6 about the optical axis L, the detection accuracy of the rotational position of the movable body 3 is reduced. Therefore, in this embodiment, the control unit 47 detects the rotational position of the movable body 3 relative to the fixed body 6 about the optical axis L based on the output signals SG1 and SG2 of the two magnetic sensors 43.

[0098] Specifically, in this embodiment, the right magnetic pole of the first driving magnet 35A and the left magnetic pole of the first driving magnet 35B are the same magnetic poles. The differential signal SG3 obtained by subtracting the output signal SG2 from the output signal SG1 is as follows: Figure 10 As shown, the movable body 3 changes linearly according to the rotation angle from the reference position. Therefore, the control unit 47 generates a differential signal SG3 based on the output signals SG1 and SG2, and detects the rotation position of the movable body 3 relative to the fixed body 6 with the optical axis L as the rotation center based on the differential signal SG3.

[0099] A second magnetic plate made of a magnetic material is fixed to the surface of the flexible printed board 42 opposite to the surface on which the second driving coil 38 is mounted, and a third magnetic plate made of a magnetic material is fixed to the surface of the flexible printed board 42 opposite to the surface on which the third driving coil 40 is mounted. The positions of the first and second intermediate members 4 and 5 arranged in the reference positions are maintained by the magnetic attractive force generated between the second driving magnet 37 and the second magnetic plate and the magnetic attractive force generated between the third driving magnet 39 and the third magnetic plate. That is, the second driving magnet 37, the second magnetic plate, the third driving magnet 39, and the third magnetic plate function to maintain the posture of the first and second intermediate members 4 and 5 when no current is supplied to the second driving coil 38 or the third driving coil 40.

[0100] (EFFECTS OF THE PRESENT EMBODIMENT)

[0101] As described above, in the present embodiment, the first, second, and third magnetic driving mechanisms 7, 8, and 9 are arranged along the two sides of the intermediate member holding portion 21a having a square shape in the upward-downward direction. Therefore, in a portable device or the like in which the optical unit 1 of the present embodiment is installed, various components can be arranged in a manner that no magnetic interference is generated in the regions along the two sides of the intermediate member holding portion 21a. Therefore, in the present embodiment, the reduction in the design freedom of the portable device or the like in which the optical unit 1 is installed can be suppressed.

[0102] In the present embodiment, the flexible printed board 18 is drawn to the right side from the camera module 2, and thus, the movable body 3 is more difficult to rotate in the upward-downward direction as the axis of rotation than in the left-right direction as the axis of rotation under the influence of the flexible printed board 18. However, in the present embodiment, only the third magnetic driving mechanism 9 is arranged along the one side of the intermediate member holding portion 21a parallel to the upward-downward direction, and thus, as described above, the width of the third driving magnet 39 in the upward-downward direction can be made wider than the width of the second driving magnet 37 in the left-right direction, and the width of the third driving coil 40 in the upward-downward direction can be made wider than the width of the second driving coil 38 in the left-right direction, and the driving force of the third magnetic driving mechanism 9 can be increased. Therefore, in the present embodiment, even if the movable body 3 is difficult to rotate in the upward-downward direction as the axis of rotation under the influence of the flexible printed board 18, the movable body 3 can be appropriately rotated in the upward-downward direction as the axis of rotation.

[0103] In the present embodiment, the first driving magnets 35 are arranged on both sides in the left-right direction of the second driving magnets 37, and the first driving coils 36 are arranged on both sides in the left-right direction of the second driving coils 38. Therefore, in the present embodiment, the optical unit 1 can be downsized in the left-right direction compared to a case in which the second driving magnets 37 are arranged on both sides in the left-right direction of the first driving magnets 35, and the second driving coils 38 are arranged on both sides in the left-right direction of the first driving coils 36. For example, the optical unit 1 can be downsized in the left-right direction by an amount corresponding to the two circular arc portions 38b of the second driving coil 38.

[0104] In addition, in the present embodiment, the second driving magnets 37 are arranged between the two first driving magnets 35 in the left-right direction, and therefore, the second driving magnets 37 can be fixed at the center portion in the left-right direction of the retainer 16, and the magnetic sensor 44 arranged opposite the second driving magnets 37 can be arranged on the axis of the rotation center axis of the movable body 3 that rotates by the driving force of the third magnetic driving mechanism 9. Therefore, in the present embodiment, the amount of shift in the optical axis direction of the second driving magnets 37 and the magnetic sensor 44 when the movable body 3 rotates about the axis of rotation in the front-rear direction relative to the fixed body 6 can be suppressed. As a result, in the present embodiment, using the second driving magnets 37 and the magnetic sensor 44, the rotational position of the movable body 3 about the axis of rotation in the left-right direction relative to the fixed body 6 can be appropriately detected.

[0105] In the present embodiment, the control section 47 detects the rotational position of the movable body 3 about the optical axis L relative to the fixed body 6 based on the output signals SG1, SG2 of the two magnetic sensors 43. Specifically, the control section 47 generates a differential signal SG3 that varies in a linear function corresponding to the rotational angle of the movable body 3 from the reference position based on the output signal SG1 of the magnetic sensor 43A and the output signal SG2 of the magnetic sensor 43B, and detects the rotational position of the movable body 3 about the optical axis L relative to the fixed body 6 based on the differential signal SG3. Therefore, in the present embodiment, even if the first driving magnets 35 are arranged on both sides in the left-right direction of the second driving magnets 37, the rotational position of the movable body 3 about the optical axis L relative to the fixed body 6 can be appropriately detected.

[0106] In the present embodiment, the magnetic pole on the right side of the first driving magnet 35A arranged on the left side of the second driving magnet 37 is the same magnetic pole as the magnetic pole on the left side of the first driving magnet 35B arranged on the right side of the second driving magnet 37. Therefore, in the present embodiment, even if the first driving magnets 35 are arranged on both sides in the left-right direction of the second driving magnet 37, the balance of the magnetic force generated by the two first driving magnets 35 with respect to the second driving magnet 37 is good. Therefore, in the present embodiment, it is possible to reduce the influence of the magnetic circuit of the first magnetic drive mechanism 7 on the second magnetic drive mechanism 8.

[0107] (Other Embodiments)

[0108] The above-described embodiment is an example of a preferred embodiment of the present application, but is not limited thereto, and various modifications can be made within the scope of the gist of the present application.

[0109] In the above-described embodiment, the magnetic pole on the right side of the first driving magnet 35A arranged on the left side of the second driving magnet 37 and the magnetic pole on the left side of the first driving magnet 35B arranged on the right side of the second driving magnet 37 can also be different magnetic poles. In this case, the winding direction of one of the two first driving coils 36 is the same as the winding direction of the other first driving coil 36. In addition, in this case, since the sum signal obtained by adding the output signal SG1 and the output signal SG2 varies in a linear function with respect to the rotation angle of the movable body 3 from the reference position, the control section 47 generates a sum signal based on the output signals SG1 and SG2, and detects the rotation position of the movable body 3 with respect to the fixed body 6 with the optical axis L as the center of rotation based on the sum signal.

[0110] In the above-described embodiment, the second driving magnet 37 can also be arranged on both sides in the left-right direction of the first driving magnet 35, and the second driving coil 38 can also be arranged on both sides in the left-right direction of the first driving coil 36. In addition, in the above-described embodiment, as long as the movable body 3 can be appropriately rotated with the front-rear direction as the axis of rotation, the first magnetic drive mechanism 7 and the third magnetic drive mechanism 9 can also be arranged along the left side of the edge of the intermediate member holding section 21a. In this case, the first driving magnet 35 can be arranged on both sides in the front-rear direction of the third driving magnet 39, and the first driving coil 36 can be arranged on both sides in the front-rear direction of the third driving coil 40, or the third driving magnet 39 can be arranged on both sides in the front-rear direction of the first driving magnet 35, and the third driving coil 40 can be arranged on both sides in the front-rear direction of the first driving coil 36.

[0111] In the above embodiment, the outer shape of the intermediate member holding portion 21a when viewed in the upward and downward direction can also be rectangular. In the above embodiment, the first drive coil 36, the second drive coil 38, and the third drive coil 40 can also be mounted on the holder 16, and the first drive magnet 35, the second drive magnet 37, and the third drive magnet 39 can be mounted on the intermediate member holding portion 21a. In the above embodiment, the housing 21 can also not have the FPC housing portion 21b. That is, the housing 21 can also be constituted only by the intermediate member holding portion 21a.

[0112] In the above embodiment, as shown in Figure 11 one set of the first drive magnet 35 and the first drive coil 36 and the second magnetic drive mechanism 8 can be arranged along the edge of the back side of the intermediate member holding portion 21a, and another set of the first drive magnet 35 and the first drive coil 36 and the third magnetic drive mechanism 9 can be arranged along the edge of the left side of the intermediate member holding portion 21a. That is, the first magnetic drive mechanism 7 can have the first drive magnet 35 and the first drive coil 36 that are arranged in opposition in the front and back direction and along the edge of the back side of the intermediate member holding portion 21a that is parallel to the left and right direction, and the first drive magnet 35 and the first drive coil 36 that are arranged in opposition in the left and right direction and along the edge of the left side of the intermediate member holding portion 21a that is parallel to the front and back direction.

[0113] In this case, for example, the first drive magnet 35 and the first drive coil 36 arranged along the edge of the back side of the intermediate member holding portion 21a are arranged on the left side of the second magnetic drive mechanism 8, and the first drive magnet 35 and the first drive coil 36 arranged along the edge of the left side of the intermediate member holding portion 21a are arranged on the back side of the third magnetic drive mechanism 9. That is, as described above, if the clockwise direction when viewed from the upper side is set as the clockwise direction, and the counterclockwise direction when viewed from the upper side is set as the counterclockwise direction, the first drive magnet 35 and the first drive coil 36 arranged along the edge of the back side of the intermediate member holding portion 21a are arranged on the counterclockwise direction side of the second magnetic drive mechanism 8, and the first drive magnet 35 and the first drive coil 36 arranged along the edge of the left side of the intermediate member holding portion 21a are arranged on the clockwise direction side of the third magnetic drive mechanism 9. In Figure 11 In the example shown in

[0114] In Figure 11In the example shown, the width of the second driving magnet 37 in the left-right direction can be made equal to the width of the third driving magnet 39 in the front-back direction, thus making the size of the second driving magnet 37 the same as the size of the third driving magnet 39. Similarly, the width of the second driving coil 38 in the left-right direction can be made equal to the width of the third driving coil 40 in the front-back direction, thus making the size of the second driving coil 38 the same as the size of the third driving coil 40. Therefore, the driving force of the second magnetic driving mechanism 8 can be made equal to the driving force of the third magnetic driving mechanism 9.

[0115] In addition, Figure 11 In the example shown, such as Figure 12 As shown in (A), when the movable body 3 rotates clockwise, the first driving magnet 35 and the first driving coil 36, which are arranged along the rear side of the intermediate member holding portion 21a, approach each other; on the other hand, the first driving magnet 35 and the first driving coil 36, which are arranged along the left side of the intermediate member holding portion 21a, move away from each other. Figure 12 As shown in (B), when the movable body 3 rotates counterclockwise, the first driving magnet 35 and the first driving coil 36, which are arranged along the rear side of the intermediate member holding portion 21a, move away from each other; on the other hand, the first driving magnet 35 and the first driving coil 36, which are arranged along the left side of the intermediate member holding portion 21a, move closer together. Therefore, in Figure 11 In the example shown, the deviation between the driving force of the first magnetic drive mechanism 7 when the movable body 3 rotates clockwise and the driving force of the first magnetic drive mechanism 7 when the movable body 3 rotates counterclockwise can be suppressed. As a result, the rotational movement of the movable body 3 relative to the fixed body 6 can be stabilized.

[0116] Alternatively, the first driving magnet 35 and the first driving coil 36, arranged along the rear edge of the intermediate component holding portion 21a, can be positioned on the right side of the second magnetic drive mechanism 8, and the first driving magnet 35 and the first driving coil 36, arranged along the left edge of the intermediate component holding portion 21a, can be positioned on the front side of the third magnetic drive mechanism 9. That is, the first driving magnet 35 and the first driving coil 36, arranged along the rear edge of the intermediate component holding portion 21a, can be positioned on the clockwise side of the second magnetic drive mechanism 8, and the first driving magnet 35 and the first driving coil 36, arranged along the left edge of the intermediate component holding portion 21a, can be positioned on the counterclockwise side of the third magnetic drive mechanism 9. In this case, the clockwise side becomes the first rotation direction side, and the counterclockwise side becomes the second rotation direction side.

[0117] Also, the first drive magnet 35 and the first drive coil 36 arranged along the rear side of the intermediate member holding portion 21a can be arranged on the left side of the second magnetic drive mechanism 8, and the first drive magnet 35 and the first drive coil 36 arranged along the left side of the intermediate member holding portion 21a can be arranged on the front side of the third magnetic drive mechanism 9, or the first drive magnet 35 and the first drive coil 36 arranged along the rear side of the intermediate member holding portion 21a can be arranged on the right side of the second magnetic drive mechanism 8, and the first drive magnet 35 and the first drive coil 36 arranged along the left side of the intermediate member holding portion 21a can be arranged on the rear side of the third magnetic drive mechanism 9.

[0118] Symbol explanation

[0119] 1 optical unit (optical unit with shake correction function)

[0120] 2 camera module

[0121] 3 movable body

[0122] 4 first intermediate member

[0123] 5 second intermediate member

[0124] 6 fixed body

[0125] 7 first magnetic drive mechanism

[0126] 8 second magnetic drive mechanism

[0127] 9 third magnetic drive mechanism

[0128] 18 flexible printed board

[0129] 21a intermediate member holding portion

[0130] 35 first drive magnet

[0131] 35a, 35b magnetization portion

[0132] 36 first drive coil

[0133] 37 second drive magnet

[0134] 38 second drive coil

[0135] 39 third drive magnet

[0136] 40 third drive coil

[0137] 43 magnetic sensor

[0138] 47 control portion

[0139] L optical axis of the camera module

[0140] SG1, SG2 output signals of the magnetic sensor

[0141] X second optical axis orthogonal direction

[0142] Y first optical axis orthogonal direction.

Claims

1. An optical unit with jitter correction function, characterized in that, The device comprises: a movable body having a camera module; a first intermediate component that holds the movable body rotatably; a second intermediate component that holds the first intermediate component rotatably; a fixed body that holds the second intermediate component rotatably; a first magnetic drive mechanism for rotating the movable body relative to the fixed body about the optical axis of the camera module; and a second magnetic drive mechanism and a third magnetic drive mechanism for rotating the movable body relative to the fixed body to tilt the optical axis of the camera module in any direction. The second magnetic drive mechanism includes a second drive magnet and a second drive coil. When the optical axis of the camera module is located at a predetermined reference position, the second drive magnet and the second drive coil are arranged opposite each other in a first optical axis orthogonal direction orthogonal to the optical axis of the camera module. The third magnetic drive mechanism includes a third drive magnet and a third drive coil. When the optical axis of the camera module is located at the reference position, the third drive magnet and the third drive coil are arranged opposite each other in a direction orthogonal to a second optical axis that is orthogonal to both the optical axis of the camera module and the first optical axis. The fixing body includes an intermediate component holding part that holds the second intermediate component in a rotatable manner. When the optical axis of the camera module is located at the reference position, the shape of the intermediate component holding part is square or rectangular when viewed from the direction of the optical axis of the camera module. The first magnetic drive mechanism, the second magnetic drive mechanism, and the third magnetic drive mechanism are arranged along both sides of the middle component holding part, which has a square or rectangular shape when viewed from the optical axis direction when the optical axis of the camera module is located at the reference position. The first intermediate component is rotatable relative to the second intermediate component with a first direction orthogonal to the optical axis of the camera module as the axis of rotation, and the second intermediate component is rotatable relative to the fixed body with a second direction intersecting the optical axis of the camera module and intersecting the first direction as the axis of rotation.

2. The optical unit with jitter correction function according to claim 1, characterized in that, It has a flexible printed circuit board extending from the movable body to one side in a direction orthogonal to the second optical axis. The first magnetic drive mechanism and the second magnetic drive mechanism are arranged along one side of the intermediate component holding portion, which is parallel to the direction orthogonal to the second optical axis. The third magnetic drive mechanism is arranged along one side of the intermediate component holding portion, which is parallel to the direction orthogonal to the first optical axis.

3. The optical unit with jitter correction function according to claim 2, characterized in that, The first magnetic drive mechanism includes two sets of first drive magnets and first drive coils arranged opposite each other in the direction orthogonal to the first optical axis. The second magnetic drive mechanism includes a set of second drive magnets and a second drive coil. The first driving magnet is arranged on both sides of the second driving magnet in the direction orthogonal to the second optical axis. The first driving coil is arranged on both sides of the second driving coil in the direction orthogonal to the second optical axis.

4. The optical unit with jitter correction function according to claim 3, characterized in that, It includes: two magnetic sensors respectively arranged opposite to the two first driving magnets; and a control unit electrically connected to the magnetic sensors. The control unit detects the rotational position of the movable body relative to the fixed body with the optical axis of the camera module as the rotation center, based on the output signals of the two magnetic sensors.

5. The optical unit with jitter correction function according to claim 3 or 4, characterized in that, The first driving magnet is composed of two magnetized parts that are polarized in a direction orthogonal to the second optical axis. The magnetic poles of the two first driving magnets on the side closest to the second driving magnet are the same.

6. The optical unit with jitter correction function according to claim 1, characterized in that, The second magnetic drive mechanism is arranged along one side of the intermediate component holding portion, which is parallel to the direction orthogonal to the second optical axis. The third magnetic drive mechanism is arranged along one side of the intermediate component holding portion, which is parallel to the direction orthogonal to the first optical axis. The first magnetic drive mechanism includes: a first drive magnet and a first drive coil disposed opposite to each other in the first optical axis orthogonal direction and disposed along one side of the intermediate member holding portion parallel to the second optical axis orthogonal direction; The first driving magnet and the first driving coil are arranged opposite each other in the orthogonal direction of the second optical axis and are arranged along one side of the intermediate component holding portion that is parallel to the orthogonal direction of the first optical axis.

7. The optical unit with jitter correction function according to claim 6, characterized in that, When the side of the movable body with the optical axis of the camera module as the center of rotation is designated as the first rotation direction side, and the opposite side of the first rotation direction side is designated as the second rotation direction side, The first driving magnet and the first driving coil, arranged along one side of the intermediate component holding portion parallel to the direction orthogonal to the second optical axis, are disposed on the first rotation direction side of the second magnetic drive mechanism. The first driving magnet and the first driving coil, which are arranged along one side of the intermediate component holding part parallel to the direction orthogonal to the first optical axis, are arranged on the second rotation direction side of the third magnetic drive mechanism.

Images