Imaging apparatus

Abstract

To provide an imaging apparatus that can reduce the size of a configuration for shake correction.SOLUTION: An imaging apparatus has: a stationary member that is disposed on a body part of the imaging apparatus; magnets that are held on the stationary member; an image pick-up device; a first movable member that holds the image pick-up device and is movable relative to the stationary member in a direction orthogonal to an optical axis of the image pick-up device; and coils that are held by the first movable member and arranged at positions facing the magnets. Part of the stationary member is arranged at a position sandwiched by the image pick-up device and the first movable member in the direction of the optical axis. Part of the coils is arranged overlapping the image pick-up device on a projection surface perpendicular to the optical axis.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an imaging device. [Background technology]

[0002] Conventionally, image stabilization devices have been widely used in which a movable part having an image sensor is moved parallel to a fixed part. In image stabilization devices, the movable part is driven to cancel out the shake based on the amount of shake detected by a shake detection part.

[0003] One type of driving force generating unit in a vibration reduction device is called a voice coil motor (VCM) system. In this configuration, a magnet is provided on either the movable or fixed part, and a coil is provided on the other. Driving force is generated by passing current through the coil in the magnetic circuit formed by the magnet. Furthermore, multiple balls are arranged between the movable and fixed parts, and the movable part is attracted to the fixed part by a biasing means such as a spring or magnet.

[0004] In a configuration using a VCM, in order to keep the image sensor in the correct position, it is necessary to constantly generate a driving force by energizing a coil to hold the moving part. This results in higher power consumption compared to an image sensor without a vibration reduction mechanism, which may reduce the number of shots the camera can take. Furthermore, in this configuration, because the VCM is located outside the image sensor, the size of the vibration reduction mechanism along the plane perpendicular to the optical axis is large, making it difficult to miniaturize the camera.

[0005] Patent document 1 discloses a device having a fixed part on which multiple coils are arranged, and a movable part equipped with multiple magnets arranged opposite the multiple coils and an imaging element, with the magnets attached to the movable part so as to overlap with the imaging element on a projection plane perpendicular to the optical axis of the light incident on the imaging element. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-170339 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the conventional technology disclosed in Patent Document 1, in addition to the imaging element, it was necessary to provide a heavy yoke member and a magnet in the moving part, and it was necessary to increase the driving power in order to keep the imaging element in the appropriate position.

[0008] Therefore, one object of the present invention is to provide an imaging device that allows for a compact configuration for image stabilization. [Means for solving the problem]

[0009] In order to achieve the above object, an imaging device of the present invention comprises: A fixing member provided in the main body of the imaging device; a magnet held by the fixing member; Image sensor and a first movable member that holds the image sensor and is movable relative to the fixed member in a direction perpendicular to an optical axis of the image sensor; a coil held by the first movable member and disposed at a position facing the magnet, a part of the fixed member is disposed at a position sandwiched between the image sensor and the first movable member in the direction of the optical axis, An imaging device, characterized in that a portion of the coil is arranged to overlap the imaging element on a projection plane perpendicular to the optical axis. [Effects of the Invention]

[0010] According to the present invention, an imaging device that allows for a compact shake correction configuration can be realized. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an example of the schematic configuration of an imaging device according to a first embodiment of the present invention. [Figure 2A]1 is an exploded perspective view of a first image stabilization unit 40 included in the imaging device according to the first embodiment. FIG. [Figure 2B] 2B is an exploded perspective view of the first image stabilization unit 40, seen from a different direction than that of FIG. 2A. FIG. [Figure 3A] 2 is an exploded perspective view of a fixed portion 20 of a first image stabilization unit 40. FIG. [Figure 3B] FIG. 3B is an exploded perspective view of the fixed part 20 of the first image stabilizer unit 40, seen from a direction different from that of FIG. 3A. [Figure 4A] 2 is an exploded perspective view of a movable part 30 of a first image stabilization unit 40. FIG. [Figure 4B] 4B is an exploded perspective view of the movable part 30 as seen from a different direction from FIG. 4A. FIG. [Figure 5A] FIG. 2 is a front view of the first image stabilization unit 40. [Figure 5B] FIG. 2 is a cross-sectional view of the first image stabilization unit 40 taken along the line AA. [Figure 6] 4 is a projection diagram showing the relationship between the image pickup element and the magnet of the shake correction unit according to the first embodiment. FIG. [Figure 7A] 10 is an exploded perspective view of a first image stabilization unit 40 included in an imaging device according to a second embodiment. FIG. [Figure 7B] FIG. 7B is an exploded perspective view of the first image stabilizer unit 40, seen from a different direction than that of FIG. 7A. [Figure 8A] FIG. 10 is an exploded perspective view of a fixed portion 20 of a first image stabilization unit 40 according to a second embodiment. [Figure 8B] 8B is an exploded perspective view of the fixed part 20 of the first image stabilizer unit 40, seen from a direction different from that of FIG. 8A. FIG. [Figure 9A] FIG. 10 is an exploded perspective view of a movable part 30 of a first image stabilization unit 40 according to a second embodiment. [Figure 9B] 9B is an exploded perspective view of the movable part 30 of the first image stabilizer unit 40, seen from a direction different from that of FIG. 9A. FIG. [Figure 10A] FIG. 10 is a front view of a first image stabilization unit 40 according to a second embodiment. [Figure 10B]FIG. 10 is a cross-sectional view of a first image stabilization unit 40 according to a second embodiment, taken along the line BB. [Figure 11A] FIG. 11 is an exploded perspective view of a first image stabilization unit 40 provided in an imaging device according to a third embodiment. [Figure 11B] 11B is an exploded perspective view of the first image stabilization unit 40 of FIG. 11A, seen from a different direction than that of FIG. 11A. FIG. [Figure 12A] FIG. 10 is an exploded perspective view of a first image stabilization unit 40 included in an imaging device according to a fourth embodiment. [Figure 12B] 12B is an exploded perspective view of the first image stabilization unit 40 of FIG. 12A, seen from a different direction than that of FIG. 12A. FIG. [Figure 13A] 10 is an exploded perspective view of a first image stabilization unit 40 included in an imaging device according to a fifth embodiment. FIG. [Figure 13B] 13B is an exploded perspective view of the first image stabilization unit 40 of FIG. 13A, seen from a different direction than that of FIG. 13A. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. In each drawing, the same members or elements are designated by the same reference numerals, and duplicate descriptions will be omitted or simplified.

[0013] (Embodiment 1) Fig. 1 is a diagram illustrating an example of the schematic configuration of an image capture device 10 according to a first embodiment of the present invention. Note that some of the functional blocks shown in Fig. 1 are realized by causing a CPU or the like serving as a computer (not shown) included in the image capture device 10 to execute a computer program stored in a memory serving as a storage medium (not shown).

[0014] However, some or all of these functions may be implemented by hardware. Examples of hardware that can be used include dedicated circuits (ASICs) and processors (reconfigurable processors, DSPs). Furthermore, the functional blocks shown in Figure 1 do not have to be built into the same housing, and may be configured as separate devices connected to each other via signal paths.

[0015] The imaging device 10 is, for example, a so-called mirrorless digital camera, and includes a main body 10a of the imaging device and a lens barrel 10b that is detachable from the main body 10a of the imaging device.

[0016] The main body 10a includes an imaging element 11 having an imaging surface 11a, an imaging FPC 18, a base member 13c, a main body side mount member 13a, a camera control unit 14, a first shake correction control unit 15a, a first vibration detection unit 16a, an image processing unit 17, and a first shake correction unit 40. Note that FPC is an abbreviation for flexible printed circuit.

[0017] Lens barrel 10b also includes imaging optical system 12 including blur correction lens 12b, lens side mount member 13b, second blur correction control section 15b, second vibration detection section 16b, and second blur correction unit 60.

[0018] In this embodiment, a virtual light ray that represents the light beam irradiated onto the imaging surface 11a of the imaging element 11 via the imaging optical system 12 is called the optical axis 12a, and a plane perpendicular to the optical axis 12a is called the optical axis perpendicular plane 12c.

[0019] The optical axis 12a passes through the center of the imaging surface 11a and is perpendicular to the imaging surface 11a. To clarify the arrangement and positional relationship of each part constituting the imaging device 10 within the imaging device 10, the X direction, Y direction, and Z direction, which are perpendicular to each other, are defined as shown in Figure 1. The Z direction is parallel to the optical axis 12a, the X direction is the width direction of the imaging device 10, and the Y direction is the height direction of the imaging device 10. The plane 12c perpendicular to the optical axis is the XY plane.

[0020] The imaging element 11 is configured with a photoelectric conversion element such as a CMOS image sensor or a CCD image sensor, and is arranged so that the imaging surface 11a faces the subject (the lens barrel 10b side) and is perpendicular to the optical axis 12a. The imaging element 11 generates an image signal by photoelectrically converting the optical image of the subject formed on the imaging surface 11a by the imaging optical system 12.

[0021] The image signal generated by the imaging element 11 is transmitted to the image processing unit 17 via the imaging FPC 18, where it is converted into image data through various processes and stored in a memory (storage device) not shown.

[0022] The camera control unit 14 is a calculation unit within a main IC (not shown), and receives input operations from a user via an operation unit (not shown) to control the overall operation of the imaging device 10. The camera control unit 14 has a built-in CPU as a computer, and controls each unit of the imaging device 10 by executing a computer program stored in a memory (not shown).

[0023] Imaging optical system 12 is composed of a group of lenses (not shown) arranged inside lens barrel 10b, and forms an image of light from a subject (not shown) on imaging surface 11a of imaging element 11. In imaging device 10, in order to position imaging element 11 with high positional accuracy relative to optical axis 12a, imaging element 11 is attached to base member 13c provided on main body 10a, and lens barrel 10b is also connected to base member 13c.

[0024] Image pickup element 11 is attached to base member 13c via first image stabilizer unit 40. Lens barrel 10b is connected to base member 13c via lens-side mount member 13b and main body-side mount member 13a.

[0025] The first image blur correction unit 40 corrects image blur caused by vibrations occurring in the imaging device 10 by moving the imaging element 11 in the XY directions or rotating it within the XY plane, thereby enabling a clear image of the subject to be obtained.

[0026] Specifically, if the posture of the imaging device 10 changes relative to the subject during imaging, the imaging position of the subject light beam on the imaging surface 11a of the imaging element 11 changes, causing blurring in the image obtained through the imaging element 11.

[0027] In this case, if the change in the posture of the imaging device 10 is sufficiently small, the change in the imaging position is uniform within the imaging surface 11a and can be regarded as a translational or rotational movement (image plane blur) within the XY plane. Therefore, by translating or rotating the imaging element 11 within the XY plane so as to cancel out this image plane blur, a clear subject image with image blur corrected can be obtained.

[0028] It should be noted that the imaging element 11 may also be configured to move in the Z direction when it translates or rotates within the XY plane. Similarly, the second image stabilization unit 60 moves the image stabilization lens 12b in the X and Y directions to correct image blur caused by vibrations occurring in the imaging device 10, thereby enabling a clear subject image to be obtained.

[0029] That is, optical axis 12a is refracted by moving blur correction lens 12b in the XY plane. At this time, blur correction lens 12b is moved in the XY plane so as to cancel out image plane blur. This makes it possible to obtain a clear subject image with image blur corrected. Note that the principle of blur correction by moving image sensor 11 and blur correction lens 12b is well known, so a detailed explanation will be omitted.

[0030] It should be noted that the configuration may also involve movement in the Z direction when image stabilization lens 12b moves in the XY plane. First image stabilization unit 40 generally has a fixed portion, a movable portion, and multiple drive force generators. The fixed portion is fixed to base member 13c, and the movable portion holds image sensor 11.

[0031] The movable part is supported by the fixed part with three degrees of freedom, and can move in the XY directions or rotate within the XY plane relative to the fixed part. In other words, the first image stabilization unit 40 is configured as a drive device (a so-called XYθ stage) that can control drive on three axes, and can move the image sensor 11 in the XY directions and rotate within the XY plane.

[0032] Second image stabilization unit 60 generally comprises a fixed section, a movable section, and multiple drive force generation sections. The fixed section is fixed to a housing (not shown) of lens barrel 10b, and the movable section holds image stabilization lens 12b. The movable section is supported by the fixed section with two degrees of freedom and can move in the X and Y directions relative to the fixed section.

[0033] That is, second blur correction unit 60 is configured as a drive device (so-called XY stage) capable of controlling drive on two axes, and is capable of moving blur correction lens 12b in the X and Y directions.

[0034] The first vibration detection unit 16a and the second vibration detection unit 16b are each composed of a gyro sensor, an acceleration sensor, etc., and are shake detection units that detect angular velocity and acceleration in each direction of the imaging device 10 as shake information of the imaging device 10.

[0035] The first shake correction control unit 15a and the second shake correction control unit 15b integrate the angular velocity and acceleration detected by the first vibration detection unit 16a and the second vibration detection unit 16b, respectively, to calculate the amount of angular change and amount of movement of the imaging device 10 in each direction as shake information.

[0036] Furthermore, the first shake correction control unit 15a calculates a movement target value for the image sensor 11 based on the shake information detected by the first vibration detection unit 16a, and controls the drive of the first shake correction unit 40, thereby controlling the movement of the image sensor 11.

[0037] Similarly, second blur correction control unit 15b calculates a movement target value for blur correction lens 12b based on the shake information detected by second vibration detection unit 16b, and controls the movement of blur correction lens 12b by controlling the driving of second blur correction unit 60. Note that imaging device 10 may be configured to include only either first blur correction unit 40 or second blur correction unit 60.

[0038] If first blur correction unit 40 is not provided, image sensor 11 is fixedly positioned relative to optical axis 12a. If second blur correction unit 60 is not provided, blur correction lens 12b is basically unnecessary. In that case, imaging optical system 12 of lens barrel 10b is designed so that the desired optical characteristics can be obtained with a lens configuration that does not include blur correction lens 12b.

[0039] Next, we will explain the detailed configuration of the first motion compensation unit 40. Note that the configuration of the second motion compensation unit 60 is well known, so explanation will be omitted.

[0040] FIG. 2A is an exploded perspective view of the first image stabilization unit 40 included in the imaging device according to the first embodiment, and FIG. 2B is an exploded perspective view of the first image stabilization unit 40 viewed from a different direction than that of FIG. 2A.

[0041] The first image stabilization unit 40 is made up of a fixed part 20, a movable part 30, and balls 41a to 41c. The fixed part 20 is made up of a front fixed part 20a and a rear fixed part 20b. The movable part 30 is made up of a front movable part 30a and a rear movable part 30b.

[0042] First image stabilizer unit 40 is arranged in the order of front movable part 30a, front fixed part 20a, rear movable part 30b, and rear fixed part 20b in order from closest to main body side mount member 13a in the Z direction.

[0043] FIG. 3A is an exploded perspective view of fixed portion 20 of first image stabilization unit 40, and FIG. 3B is an exploded perspective view of fixed portion 20 of first image stabilization unit 40 as seen from a different direction than FIG. 3A.

[0044] The front fixed part 20a has a base plate 21, a first front magnet group 23a, a second front magnet group 23b, and a third front magnet group 23c. Here, the base plate 21 functions as a fixed member disposed inside the main body 10a of the imaging device.

[0045] The first front magnet group 23a, the second front magnet group 23b, and the third front magnet group 23c are each held by being fixed to a base plate 21 serving as a fixing member with an adhesive or the like. The base plate 21 serving as a fixing member is made of a magnetic material. The rear fixing part 20b has a rear yoke 22.

[0046] In this embodiment, the first front magnet group 23a, the second front magnet group 23b, and the third front magnet group 23c are each arranged so that two magnets magnetized in the Z direction generate magnetic fields in opposite directions. However, this is not limiting, and one magnet magnetized with two poles may also be used.

[0047] The fixed part 20 also has a first support member 24a, a second support member 24b, and a third support member 24c. The rear yoke 22 of the rear fixed part 20b is fixed to the base plate 21 of the front fixed part 20a with screws or the like via the first support member 24a, the second support member 24b, and the third support member 24c.

[0048] In addition, the first support member 24a, the second support member 24b, and the third support member 24c are arranged in positions that restrict the movement of the movable part 30, and restrict the movement of the movable part 30 in the XY plane to a predetermined range.

[0049] At the contact points between the first support member 24a, the second support member 24b, and the third support member 24c and the movable part 30, cushioning materials such as rubber are provided to absorb the impact at the time of contact, thereby avoiding damage and reducing impact noise.

[0050] The rear yoke 22 and the base plate 21 are arranged to sandwich the first front magnet group 23a, the second front magnet group 23b, and the third front magnet group 23c in the Z direction. The first front magnet group 23a forms a first magnetic circuit that passes through the rear yoke 22 and the base plate 21. Similarly, the second front magnet group 23b and the third front magnet group 23c form a second magnetic circuit and a third magnetic circuit.

[0051] FIG. 4A is an exploded perspective view of movable part 30 of first image stabilizer unit 40, and FIG. 4B is an exploded perspective view of movable part 30 seen from a different direction than that of FIG. 4A.

[0052] The movable part 30 is composed of a front movable part 30a and a rear movable part 30b. The front movable part 30a has the imaging element 11, the imaging FPC 18, and a second movable member 32, and the imaging element 11 is fixed to the second movable member 32 with an adhesive or the like.

[0053] The rear movable part 30b has a first movable member 31, a first coil 33a, a second coil 33b, a third coil 33c, a drive FPC 35, a thrust magnet 37, and a thrust yoke 38. The first movable member 31 has a fourth support column 31a, a fifth support column 31b, and a sixth support column 31c.

[0054] The first movable member 31 holds the imaging element 11 and is movable in a direction perpendicular to the optical axis of the imaging element relative to the base plate 21, which serves as a fixed member. The first coil 33a, the second coil 33b, and the third coil 33c are held by the first movable member 31 and are disposed in positions facing the first front magnet group 23a, the second front magnet group 23b, and the third front magnet group 23c, respectively.

[0055] The second movable member 32 of the front movable part 30a is fixed with screws or the like to the fourth support part 31a, the fifth support part 31b, and the sixth support part 31c formed on the first movable member 31 of the rear movable part 30b. That is, the second movable member 32 holds the imaging element 11 and is fixed to the first movable member 31.

[0056] Furthermore, the fourth support portion 31a, the fifth support portion 31b, and the sixth support portion 31c may be arranged at positions that restrict the movement of the movable portion 30, and may be configured to restrict the movement of the movable portion 30 in the XY plane within a predetermined range.

[0057] At the contact points between the fourth support portion 31a, the fifth support portion 31b, and the fixed portion 20 of the fifth support portion 31b, cushioning materials such as rubber are provided to absorb the impact at the time of contact, thereby avoiding damage and reducing impact noise.

[0058] It is desirable that the second movable member 32 be made of a material with a linear expansion coefficient greater than that of the first movable member 31. As a result, when the temperature inside the imaging device 10 changes, the movable part 30 deforms in the Z direction due to the bimetal effect of the first movable member 31 and the second movable member 32.

[0059] This deformation is in the opposite direction to the deformation of the base member 13c, which makes it possible to suppress changes in the distance between the lens side mount member 13b and the imaging surface 11a. In other words, it is possible to suppress changes in the flange bank when the temperature inside the imaging device 10 changes.

[0060] However, the present invention is not limited to this, and the imaging element 11 may have a fixing portion for fixing to the first movable member 31 and may be configured to be directly fixed to the first movable member 31 with screws or the like. In this case, the second movable member 32 is not necessary.

[0061] The drive FPC 35 is disposed so as to overlap the first coil 33a, the second coil 33b, and the third coil 33c on the XY projection plane, and is fixed to the first movable member 31 with an adhesive or the like.

[0062] The first movable member 31 has a first recess 31d, a second recess 31e, and a third recess 31f. The first coil 33a is disposed inside the first recess 31d, the second recess 31e is disposed inside the second recess 31e, and the third coil 33c is disposed inside the third recess 31f, and are fixed to the first movable member 31 with an adhesive or the like.

[0063] The first magnetic circuit and the first coil 33a form a VCM as a first actuator, the second magnetic circuit and the second coil 33b form a VCM as a second actuator, and the third magnetic circuit and the third coil 33c form a VCM as a third actuator.

[0064] A Lorentz force is generated in a direction perpendicular to the magnetic field generated in the Z direction in the first magnetic circuit and the current flowing through the first coil 33a, and the direction of the resultant Lorentz force changes depending on the direction of current flow through the first coil 33a. Similar Lorentz forces are also generated between the second magnetic circuit and the second coil 33b, and between the third magnetic circuit and the third coil 33c.

[0065] The first and second actuators generate forces (driving forces) substantially parallel to the Y direction, and the sum of the respective forces generates a translational force in the Y direction, while the difference between the respective forces generates a rotational force around the optical axis. The third actuator generates a translational force in the X direction. A first detection element 35a, a second detection element 35b, and a third detection element 35c are attached to the driving FPC 35.

[0066] The first detection element 35a is disposed inside the first coil 33a, the second detection element 35b is disposed inside the second coil 33b, and the third detection element 35c is disposed inside the third coil 33c.

[0067] The first detection element 35a, the second detection element 35b, and the third detection element 35c are, for example, Hall elements. The first detection element 35a detects the magnetic force of the first magnetic circuit, and based on the result, the first image stabilization control unit 15a calculates position information (specifically, the position and angle around the optical axis) of the movable part 30 in the XY plane relative to the fixed part 20. The same applies to the second detection element 35b and the third detection element 35c.

[0068] The first coil 33a, the second coil 33b, and the third coil 33c are electrically connected to a driving FPC , and the first shake correction control unit 15a controls the current flowing through each coil via the driving FPC .

[0069] That is, first shake correction control unit 15a calculates the deviation between a movement target value of image sensor 11 based on shake information detected by first vibration detection unit 16a and the current position of image sensor 11 detected by first detection element 35a to third detection element 35c, and then controls the driving of movable unit 30 by feedback control based on the deviation.

[0070] The movable member 30 is supported by the base plate 21 via balls 41a to 41c, which are rolling members, so as to be movable within the XY plane. The balls 41a to 41c are respectively arranged inside a first enclosure 31h, a second enclosure 31i, and a third enclosure 31j, which are provided on the first movable member 31. That is, the plurality of balls 41a to 41c, which serve as rolling members, are arranged so as to come into contact with the first movable member 31 and the base plate 21, which serves as a fixed member.

[0071] When the movable part 30 moves within the XY plane relative to the fixed part 20, the balls 41a to 41c roll, so that the load due to friction between the first movable member 31 and the base plate 21 is minimal. The first movable member 31 has a fourth recess 31g at a position facing the base plate 21.

[0072] The thrust magnet 37 and the thrust yoke 38 are each fixed to the fourth recess 31g with an adhesive or the like. The thrust magnet 37 forms a fourth magnetic circuit that passes through the thrust yoke 38 and the base plate 21. In the movable part 30, the first movable member 31 is urged in the +Z direction toward the base plate 21 by an attractive force generated between the thrust magnet 37 and the base plate 21.

[0073] That is, the thrust magnet 37, the thrust yoke 38, and the base plate 21 constitute a first biasing portion that biases the movable portion 30 toward the fixed portion 20 in the +Z direction.

[0074] The movable part 30 further includes a first thrust metal plate 35d and a second thrust metal plate 35e. The first thrust metal plate 35d is disposed in a position facing the first front magnet group 23a, and the second thrust metal plate 35e is disposed in a position facing the third front magnet group 23c, and they are fixed to the drive FPC 35 with an adhesive or the like.

[0075] The first thrust metal plate 35d and the second thrust metal plate 35e are held by the first movable member 31 and function as yoke members arranged in positions facing the first front magnet group 23a and the third front magnet group 23c, respectively.

[0076] The first thrust metal plate 35d and the second thrust metal plate 35e are made of a magnetic material, and generate an attractive force between them and the first front magnet group 23a and the third front magnet group 23c that face them, respectively.

[0077] The first thrust metal plate 35d and the second thrust metal plate 35e constitute a second biasing portion and a third biasing portion, respectively, for biasing the first movable member 31 in the +Z direction toward the base plate 21, which serves as a fixed member.

[0078] That is, the first thrust metal plate 35d and the second thrust metal plate 35e, which serve as yoke members, urge the first movable member 31 in a direction approaching the base plate 21 by the magnetic forces of the first front magnet group 23a and the third front magnet group 23c.

[0079] This makes it possible to reduce the size of the rear yoke 22 in the XY plane, and by leading out the drive FPC 35 in the opposite direction to the rear yoke 22 in the XY plane, it is possible to prevent the first image stabilization unit 40 from becoming larger in the Z direction.

[0080] The first, second, and third urging portions are arranged in the XY plane so that the center of gravity of the movable portion 30 is located within a triangle formed by connecting the urging portions. The same applies to the arrangement of the balls 41a to 41c. As a result, a well-balanced urging force can be generated on the movable portion 30. This makes it possible to prevent the movable portion 30 from floating up when driven.

[0081] Next, the relationship between the imaging element 11 of the first image stabilization unit 40 described above and the first, second, and third magnetic circuits will be described.

[0082] Fig. 5A is a front view of first image stabilization unit 40, and Fig. 5B is a cross-sectional view taken along line AA of first image stabilization unit 40. As shown in Fig. 5B, movable section 30 abuts on fourth support section 31a (and fifth support section 31b and sixth support section 31c) of first movable member 31 and second movable member 32, and is fixed with clearance in other areas.

[0083] The front fixing portion 20a and rear fixing portion 20b of the fixing portion 20 contact the first support member 24a, the second support member 24b, and the third support member 24c, respectively, and the other areas are fixed with clearance.

[0084] As shown in FIG. 5B, in a cross section near the first magnetic circuit, the front movable part 30a (imaging element 11 and second movable member 32) are arranged in this order with a clearance from the +Z direction to the −Z direction.

[0085] Next, in the -Z direction, the front fixed part 20a (base plate 21 and first front magnet group 23a) and the rear movable part 30b (first movable member 31, drive FPC 35 having first coil 33a) are arranged in this order with a clearance. Further next, in the -Z direction, the rear fixed part 20b (rear yoke 22) is arranged with a clearance. The second and third magnetic circuits are arranged in the same manner as the first magnetic circuit.

[0086] Furthermore, in the cross section of the support portion (near the ball 41a) of the movable portion 30 and the fixed portion 20, the front movable portion 30a (the image sensor 11 and the second movable member 32) and the front fixed portion 20a (the base plate 21) are arranged in that order from the +Z direction to the -Z direction.

[0087] Further next in the -Z direction, ball 41a and rear movable part 30b (first movable member 31) are arranged. The same is true for other parts of movable part 30 and fixed part 20 (near ball 41b and ball 41c).

[0088] In this manner, in this embodiment, a part of the base plate 21 serving as a fixed member is disposed at a position sandwiched between the imaging element 11 and the first movable member 31 in the optical axis direction (Z direction).

[0089] In addition, the first front magnet group 23a, the second front magnet group 23b, and the third front magnet group 23c are arranged at positions sandwiched between the imaging element 11 and the first movable member 31 in the optical axis direction (Z direction).

[0090] Fig. 6 is a projection diagram showing the relationship between the imaging element and magnets of the image stabilization unit according to embodiment 1. That is, it is a projection diagram showing the imaging element 11, first front magnet group 23a, second front magnet group 23b, third front magnet group 23c, and balls 41a to 41c of Fig. 5B.

[0091] As shown in FIG. 6, the first front magnet group 23a, the second front magnet group 23b, the third front magnet group 23c and the balls 41a to 41c are arranged so as to overlap at least partially with the imaging element 11 on the XY projection plane.

[0092] That is, parts of the first front magnet group 23a, the second front magnet group 23b, and the third front magnet group 23c are arranged to overlap the imaging element (11) on the projection surface.

[0093] Furthermore, parts of the first coil 33a, the second coil 33b, and the third coil 33c are also arranged to overlap the imaging element 11 on the projection plane perpendicular to the optical axis. Furthermore, at least parts of the balls 41a to 41c serving as rolling members are also arranged to overlap the imaging element 11 on the XY projection plane.

[0094] As explained above, in the image stabilization device of this embodiment, first front magnet group 23a, second front magnet group 23b, and third front magnet group 23c are not arranged on movable section 30. Moreover, first front magnet group 23a, second front magnet group 23b, and third front magnet group 23c can be arranged so that at least a portion of them overlaps with image sensor 11 on the projection plane of optical axis 12a.

[0095] This makes it possible to reduce the size of first motion compensation unit 40 by increasing the weight of movable part 30 of first motion compensation unit 40 (that is, without increasing the drive power).

[0096] (Embodiment 2) 7 to 10, a more preferable embodiment 2 of the position detection means for the movable part 30 in the first image stabilization unit 40 of the imaging device 10 according to the second embodiment of the present invention will be described below. Note that, since the components other than the position detection means for the movable part 30 are the same as those in the first embodiment, their description will be omitted.

[0097] FIG. 7A is an exploded perspective view of the first image stabilization unit 40 included in the imaging device according to the second embodiment, and FIG. 7B is an exploded perspective view of the first image stabilization unit 40 seen from a different direction than that of FIG. 7A.

[0098] First image stabilization unit 40 is made up of fixed part 20, movable part 30 and balls 41a to 41c. Fixed part 20 is made up of front fixed part 20a and rear fixed part 20b.

[0099] The movable part 30 is made up of a front movable part 30a and a rear movable part 30b. The first image stabilizer unit 40 is arranged in the order of closest to the main body mount member 13a in the Z direction: the front movable part 30a, the front fixed part 20a, the rear movable part 30b, and the rear fixed part 20b.

[0100] FIG. 8A is an exploded perspective view of fixed portion 20 of first image stabilization unit 40, and FIG. 8B is an exploded perspective view of fixed portion 20 of first image stabilization unit 40 as viewed from a different direction than that of FIG. 8A.

[0101] The base plate 221 has a first opening 221a, a second opening 221b, and a third opening 221c at positions facing the first front magnet group 23a, the second front magnet group 23b, and the third front magnet group 23c, respectively.

[0102] The first opening 221a has a larger movement amount in a direction perpendicular to the optical axis than the first movable member 31. In addition, the first opening 221a has a first beam portion 221d at a position that coincides with the boundary surface between the north pole and south pole on the XY projection plane of the first front magnet group 23a.

[0103] The second opening 221b and the third opening 221c also have second beam portions 221e and third beam portions 221f, respectively, and the size of the openings and the positions of the beam portions are similar to those of the first opening 221a. That is, the first opening 221a to the third opening 221c have first beam portions 221d to third beam portions 221f at positions that coincide with the boundary plane between the N poles and S poles of the first front magnet group 23a to the third front magnet group 23c in a plane perpendicular to the optical axis.

[0104] 9A is an exploded perspective view of movable part 30 of first image stabilization unit 40, and FIG. 9B is an exploded perspective view of movable part 30 of first image stabilization unit 40 as seen from a different direction than that of FIG. 9A.

[0105] The drive FPC 35 is disposed so as to overlap the first coil 33a, the second coil 33b, and the third coil 33c on the XY projection plane, and is fixed to the first movable member 31 with an adhesive or the like.

[0106] The first coil 33a, the second coil 33b, and the third coil 33c are electrically connected to a driving FPC , and the first shake correction control unit 15a controls the current flowing through each coil via the driving FPC .

[0107] In the second embodiment, as will be described later, the detection element is disposed on the detection FPC 236, and unlike the first embodiment, the detection element is not disposed on the drive FPC 35. The detection FPC 236 is disposed on the −Z side surface of the second movable member 232, and is fixed to the second movable member 232 with an adhesive or the like.

[0108] A first detection element 236a, a second detection element 236b, and a third detection element 236c are attached to the detection FPC 236. The first detection element 236a, the second detection element 236b, and the third detection element 236c function as position detection means for detecting the position of the first movable member 31, and in this embodiment, are arranged on the second movable member 32. The position detection means may also be arranged on the imaging element 11 side.

[0109] First detection element 236a is arranged at a position facing first opening 221a, second detection element 236b is arranged at a position facing second opening 221b, and third detection element 236c is arranged at a position facing third opening 221c. That is, first opening 221a to third opening 221c of base plate 221 as a fixing member are provided at positions facing first detection element 236a to third detection element 236c as position detection means.

[0110] The first detection element 236a, the second detection element 236b, and the third detection element 236c are, for example, Hall elements. A first detection yoke 236d is arranged on the detection FPC 236 opposite the first detection element 236a, a second detection yoke 236e is arranged on the detection FPC 236 opposite the second detection element 236b, and a third detection yoke 236f is arranged on the detection FPC 236 opposite the third detection element 236c.

[0111] The first detection yoke 236d, the second detection yoke 236e, and the third detection yoke 236f are each made of a magnetic material and fixed to the detection FPC 236 with an adhesive or the like.

[0112] Fig. 10A is a front view of first image stabilization unit 40, and Fig. 10B is a cross-sectional view taken along line BB of first image stabilization unit 40. As shown in Fig. 10B, the following are arranged in this order from the +Z direction: image sensor 11, second movable member 232, first detection yoke 236d, first detection element 236a, base plate 221, first front magnet group 23a, first coil 33a, and rear yoke 22.

[0113] That is, the first front magnet group 23a is disposed between the first coil 33a and the first detection element 236a serving as a position detection means in the optical axis direction (Z direction).

[0114] As described above, base plate 221 has first opening 221a at a position facing first front magnet group 23a. Therefore, first front magnet group 23a forms a fifth magnetic circuit that passes through first opening 221a and first detection yoke 236d. First detection element 236a detects the magnetic force of the fifth magnetic circuit.

[0115] Here, the first detection yoke 236d is arranged closer to the first front magnet group 23a in the Z direction than the imaging element 11. Therefore, it also serves to prevent the magnetic field of the first front magnet group 23a that passes through the first opening 221a from entering the imaging element 11 and causing noise in the imaging signal.

[0116] Furthermore, the first beam portion 221d serves to expand the range in which the magnetic flux density changes linearly within the range in which the first detection element 236a can detect the magnetic flux density of the fifth magnetic circuit. In this embodiment, the first beam portion 221d is formed integrally with the base plate 221, but a configuration in which a separate component made of a magnetic material is attached to the first opening 221a of the base plate 221 may also be used. Furthermore, the first beam portion 221d may not be present.

[0117] Similarly, the second front magnet group 23b and the third front magnet group 23c form a sixth magnetic circuit and a seventh magnetic circuit that pass through the second detection yoke 236e and the third detection yoke 236f, respectively. The second detection element 236b and the third detection element 236c detect the magnetic forces of the sixth magnetic circuit and the seventh magnetic circuit, respectively.

[0118] The first blur correction control unit 15a calculates position information (specifically, the position and angle around the optical axis) of the movable unit 30 relative to the fixed unit 20 in the XY plane based on the detection results of the magnetic forces of the first detection element 236a, the second detection element 236b, and the third detection element 236c.

[0119] First shake correction control unit 15a calculates the deviation between a movement target value of image sensor 11 based on shake information detected by first vibration detection unit 16a and the current position of image sensor 11 calculated from first detection element 236a to third detection element 236c, and then controls the driving of movable unit 30 by feedback control based on the deviation.

[0120] Here, if a detection element is disposed inside the coil as in the first embodiment, there is a possibility that magnetic force generated from the coil when current is applied to the coil may enter the detection element, which may result in an error in the position information of the movable part 30 calculated by the first shake correction control unit 15a from the magnetic force detected by the detection element.

[0121] However, by arranging the detection element on the opposite side of the coil in the Z direction across the magnet as in the second embodiment, the magnetic force generated from the coil and entering the detection element can be reduced.

[0122] In the first embodiment, the first movable member 31 is subjected to an attractive force by the first biasing portion, the second biasing portion, and the third biasing portion, which biases the first movable member 31 in the +Z direction toward the base plate 21. On the other hand, the second movable member 232 is subjected to an attractive force by the fifth magnetic circuit, the sixth magnetic circuit, and the seventh magnetic circuit, which biases the second movable member 232 in the -Z direction toward the base plate 21.

[0123] Here, the sizes of the first thrust metal plate 35d, the second thrust metal plate 35e, the thrust yoke 38, the first detection yoke 236d, the second detection yoke 236e, and the third detection yoke 236f are set as follows.

[0124] That is, the force that attracts the first movable member 31 to the base plate 21 is set to be greater than the force that attracts the second movable member 232 to the base plate 21. Therefore, the first movable member 31 is biased in the +Z direction toward the base plate 21.

[0125] This makes it possible to reduce the size of rear yoke 22 in the XY plane, as in embodiment 1. Furthermore, by leading out drive FPC 35 in the opposite direction to rear yoke 22 in the XY plane, it is possible to prevent first image stabilization unit 40 from becoming large in the Z direction.

[0126] (Embodiment 3) Next, a description will be given of the first image stabilization unit 40 of the third embodiment. The fourth embodiment is a modified example of the first embodiment.

[0127] FIG. 11A is an exploded perspective view of the first image stabilization unit 40 provided in the imaging device of embodiment 3, and FIG. 11B is an exploded perspective view of the first image stabilization unit 40 of FIG. 11A viewed from a different direction than that of FIG. 11A.

[0128] The first image stabilization unit 40 of the third embodiment is made up of a fixed part 320, a movable part 330, balls 41a to 41c, etc. The fixed part 320 is made up of a front fixed part 320a and a rear fixed part 320b, etc. The movable part 330 is made up of a front movable part 330a and a rear movable part 330b, etc.

[0129] In the first image stabilization unit 40 of the third embodiment, the front movable part 330a, the front fixed part 320a, the rear movable part 330b, and the rear fixed part 320b are arranged in this order in order from closest to the main body side mount member 13a in the Z direction.

[0130] The front fixing part 320a has a front yoke 322. The rear fixing part 320b has a base plate 321, a first rear magnet group 323a, a second rear magnet group 323b, and a third rear magnet group 323c. Here, the base plate 321 functions as a fixing member on which the imaging device main body 10a is arranged.

[0131] First rear magnet group 323a, second rear magnet group 323b, and third rear magnet group 323c are each held by being fixed to base plate 321 as a fixing member with adhesive or the like. Base plate 321 as a fixing member is made of a magnetic material.

[0132] The fixed part 320 has a first support member 324a, a second support member 324b, and a third support member 324c. The front yoke 322 of the front fixed part 320a is fixed to the base plate 321 of the rear fixed part 320b with screws or the like via the first support member 324a, the second support member 324b, and the third support member 324c.

[0133] Additionally, the first support member 324a, the second support member 324b, and the third support member 24c restrict the movement of the movable portion 330 in the XY plane within a predetermined range.

[0134] The front yoke 322 and the base plate 321 are arranged to sandwich the first rear magnet group 323a, the second rear magnet group 323b, and the third rear magnet group 323c in the Z direction.

[0135] The first rear magnet group 323a forms a first magnetic circuit passing through the front yoke 322 and the base plate 321. Similarly, the second rear magnet group 323b and the third rear magnet group 323c form a second magnetic circuit and a third magnetic circuit.

[0136] The movable part 330 is made up of a front movable part 330a and a rear movable part 330b, etc. The front movable part 330a has the imaging element 11, the imaging FPC 18, and a second movable member 332, and the imaging element 11 is fixed to the second movable member 332 with an adhesive or the like.

[0137] The rear movable part 330b has a first movable member 331, a first coil 333a, a second coil 333b, a third coil 333c, a drive FPC 335, a thrust magnet 37 (not shown), and a thrust yoke 38. The first movable member 331 has a fourth support column 331a, a fifth support column 331b, and a sixth support column 331c.

[0138] The first movable member 331 holds the imaging element 11 and is movable in a direction perpendicular to the optical axis of the imaging element relative to the base plate 321 serving as a fixed member. The first coil 333a, the second coil 333b, and the third coil 333c are held by the first movable member 331 and are arranged at positions corresponding to the first rear magnet group 323a, the second rear magnet group 323b, and the third rear magnet group 323c, respectively.

[0139] The second movable member 332 of the front movable part 330a is fixed with screws or the like to the fourth support part 331a, the fifth support part 331b, and the sixth support part 331c formed on the first movable member 331 of the rear movable part 330b. That is, the second movable member 332 holds the imaging element 11 and is fixed to the first movable member 331.

[0140] (Embodiment 4) Next, a description will be given of the first image stabilization unit 40 of the fourth embodiment. The fourth embodiment is another modification of the first embodiment.

[0141] FIG. 12A is an exploded perspective view of the first image stabilization unit 40 included in the imaging device of embodiment 4, and FIG. 12B is an exploded perspective view of the first image stabilization unit 40 of FIG. 12A viewed from a different direction than that of FIG. 12A.

[0142] The first image stabilization unit 40 of the fourth embodiment is made up of a fixed part 420, a movable part 430, balls 41a to 41c, etc. The fixed part 420 is made up of a front fixed part 420a and a rear fixed part 420b, etc. The movable part 430 is made up of a front movable part 430a and a rear movable part 430b, etc.

[0143] In the first image stabilizer unit 40 of the fourth embodiment, the front movable part 430a, the front fixed part 420a, the rear movable part 430b, and the rear fixed part 420b are arranged in this order in order from closest to the main body side mount member 13a in the Z direction.

[0144] The front fixing part 420a has a base plate 421. Here, the base plate 421 functions as a fixing member disposed inside the main body part 10a of the imaging device. The base plate 421 is made of a magnetic material.

[0145] The rear fixed part 420b has a rear yoke 422, a first coil 433a, a second coil 433b, a third coil 433c, and a driving FPC 435. The first coil 433a, the second coil 433b, and the third coil 433c are held by the rear yoke 422, and are arranged to face a first magnet group 423a, a second magnet group 423b, and a third magnet group 423c, respectively, which will be described later.

[0146] The fixed part 420 also has a first support pillar 424a, a second support pillar 424b, and a third support pillar 424c. The rear yoke 422 of the rear fixed part 420b is fixed to the base plate 421 of the front fixed part 420a with screws or the like via the first support pillar 424a, the second support pillar 424b, and the third support pillar 424c.

[0147] In addition, the first support column 424a, the second support column 424b, and the third support column 424c are arranged at positions that restrict the movement of the movable section 430, and restrict the movement of the movable section 430 in the XY plane to within a predetermined range.

[0148] The movable part 430 is made up of a front movable part 430a and a rear movable part 430b, etc. The front movable part 430a has the imaging element 11, the imaging FPC 18, and a second movable member 432, and the imaging element 11 is fixed to the second movable member 432 with an adhesive or the like.

[0149] The rear movable part 430b has a first movable part 431, a first magnet group 423a, a second magnet group 423b, a third magnet group 423c, a thrust magnet 37 (not shown), and a thrust yoke 38. The first movable part 431 has a fourth support column 431a, a fifth support column 431b, and a sixth support column 431c.

[0150] The first movable part 431 holds the imaging element 11 and is movable in a direction perpendicular to the optical axis of the imaging element relative to the base plate 421 serving as a fixed member. The first rear magnet group 323a, the second rear magnet group 323b, and the third rear magnet group 323c are each held by being fixed to the first movable part 431 serving as a fixed member with an adhesive or the like.

[0151] The base plate 421 of the front fixed part 420a and the rear yoke 422 of the rear fixed part 420b are arranged to sandwich the first magnet group 423a, the second magnet group 423b, and the third magnet group 423c in the Z direction.

[0152] The first magnet group 423a forms a first magnetic circuit that passes through the base plate 421 and the rear yoke 422. Similarly, the second magnet group 423bb and the third magnet group 423c form a second magnetic circuit and a third magnetic circuit.

[0153] The second movable member 432 of the front movable part 430a is fixed with screws or the like to a fourth support part 431a, a fifth support part 431b, and a sixth support part 431c formed on the first movable part 431 of the rear movable part 430b. That is, the second movable member 432 holds the imaging element 11 and is fixed to the first movable part 431.

[0154] (Embodiment 5) Next, a description will be given of the first image stabilization unit 40 of the fifth embodiment. The fourth embodiment is a further modified example of the first embodiment.

[0155] FIG. 13A is an exploded perspective view of the first image stabilization unit 40 included in the imaging device of embodiment 5, and FIG. 13B is an exploded perspective view of the first image stabilization unit 40 of FIG. 13A viewed from a different direction than that of FIG. 13A.

[0156] The first image stabilization unit 40 of the fifth embodiment is made up of a fixed part 520, a movable part 530, balls 41a to 41c, etc. The fixed part 520 is made up of a front fixed part 520a and a rear fixed part 520b, etc. The movable part 530 is made up of a front movable part 530a and a rear movable part 530b, etc.

[0157] In the first image stabilizer unit 40 of the fifth embodiment, the front movable part 530a, the front fixed part 520a, the rear movable part 530b, and the rear fixed part 520b are arranged in this order in order from closest to the main body mount member 13a in the Z direction.

[0158] The front fixed part 520a has a front yoke 522, a first coil 533a, a second coil 533b, and a third coil 533c. The rear fixed part 520b has a base plate 521. Here, the base plate 521 functions as a fixed member disposed inside the main body 10a of the imaging device. The base plate 521 is made of a magnetic material.

[0159] The front fixed part 520a has a front yoke 522, a first coil 533a, a second coil 533b, a third coil 533c, and a drive FPC 535. The first coil 533a, the second coil 533b, and the third coil 533c are held by the front yoke 522 and are arranged to face a first magnet group 523a, a second magnet group 523b, and a third magnet group 523c, respectively, which will be described later.

[0160] Furthermore, fixed part 520 has first support pillar 524a, second support pillar 524b, and third support pillar 524c. Front yoke 522 of front fixed part 520a is fixed to base plate 521 of rear fixed part 520b with screws or the like via first support pillar 524a, second support pillar 524b, and third support pillar 524c.

[0161] In addition, the first support column 524a, the second support column 524b, and the third support column 524c are arranged at positions that restrict the movement of the movable section 530, and restrict the movement of the movable section 530 in the XY plane to within a predetermined range.

[0162] The movable part 530 is made up of a front movable part 530a, a rear movable part 530b, etc. The front movable part 530a has the imaging element 11, the imaging FPC 18, and a second movable member 532, and the imaging element 11 is fixed to the second movable member 532 with an adhesive or the like.

[0163] The rear movable part 530b has a first movable part 531, a first magnet group 523a, a second magnet group 523b, a third magnet group 523c, a thrust magnet 37 (not shown), and a thrust yoke 38. The first movable part 531 has a fourth support column 531a, a fifth support column 531b, and a sixth support column 531c.

[0164] The first movable part 531 holds the imaging element 11 and is movable in a direction perpendicular to the optical axis of the imaging element relative to the base plate 521 serving as a fixed member. The first magnet group 523a, the second magnet group 523b, and the third magnet group 523c are each held by being fixed to the first movable part 531 serving as a fixed member with an adhesive or the like.

[0165] The front yoke 522 of the front fixed part 520a and the base plate 521 of the rear fixed part 520b are arranged to sandwich the first magnet group 523a, the second magnet group 523b, and the third magnet group 523c in the Z direction.

[0166] The first magnet group 523a forms a first magnetic circuit passing through the front yoke 522 and the base plate 521. Similarly, the second magnet group 523b and the third magnet group 523c form a second magnetic circuit and a third magnetic circuit.

[0167] The second movable member 532 of the front movable part 530a is fixed with screws or the like to a fourth support part 531a, a fifth support part 531b, and a sixth support part 531c formed on the first movable part 531 of the rear movable part 530b. That is, the second movable member 532 holds the imaging element 11 and is fixed to the first movable part 531.

[0168] The present invention has been described above in detail based on its preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications and combinations of the above embodiments are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0169] The present invention also includes those that realize the functions of the above-described embodiments using at least one processor or circuit such as a CPU, etc. Also, it is possible to use multiple processors to perform distributed processing.

[0170] In order to realize some or all of the control in the above-described embodiments, a computer program that realizes the functions of the above-described embodiments may be supplied to an imaging device or the like via a network or various storage media. Then, a computer (or a CPU, MPU, or the like) in the imaging device or the like may read and execute the program. In this case, the program and the storage medium storing the program constitute the present invention. The present invention also includes the following combinations.

[0171] (Configuration 1) An imaging device comprising: a fixed member disposed in the main body of the imaging device; a magnet held by the fixed member; an imaging element; a first movable member that holds the imaging element and is movable relative to the fixed member in a direction perpendicular to the optical axis of the imaging element; and a coil held by the first movable member and positioned opposite the magnet, wherein a portion of the fixed member is positioned between the imaging element and the first movable member in the direction of the optical axis, and a portion of the coil is positioned overlapping the imaging element on a projection plane perpendicular to the optical axis.

[0172] (Configuration 2) The imaging device described in Configuration 1, characterized in that the magnet is positioned between the imaging element and the first movable member in the direction of the optical axis, and a portion of the magnet is positioned overlapping the imaging element on the projection surface.

[0173] (Configuration 3) The imaging device according to configuration 1 or 2, wherein the fixing member is made of a magnetic material.

[0174] (Configuration 4) An imaging device described in any one of configurations 1 to 3, characterized in that it has a yoke member held by the first movable member and positioned opposite the magnet, and the magnetic force of the yoke member and the magnet urges the first movable member in a direction approaching the fixed member.

[0175] (Configuration 5) An imaging device according to any one of configurations 1 to 4, characterized in that it has the first movable member and a plurality of rolling members arranged to abut against the fixed member, and at least a portion of the rolling members are arranged to overlap the imaging element on the projection surface.

[0176] (Configuration 6) The imaging device according to any one of configurations 1 to 5, wherein a portion of the coil is disposed so as to overlap the imaging element on the projection surface.

[0177] (Configuration 7) A second movable member is provided which holds the imaging element and is fixed to the first movable member, 7. The imaging device according to any one of configurations 1 to 6, wherein the second movable member has a larger linear expansion coefficient than the first movable member.

[0178] (Configuration 8) An imaging device according to Configuration 7, characterized in that it has a position detection means for detecting the position of the first movable member, the position detection means being arranged on the imaging element or the second movable member, and the magnet being arranged between the coil and the position detection means in the direction of the optical axis.

[0179] (Configuration 9) The imaging device according to configuration 8, wherein the fixed member is made of a magnetic material and has an opening at a position facing the position detecting means.

[0180] (Configuration 10) The imaging device according to configuration 9, wherein the opening is larger than the amount of movement of the first movable member in a direction perpendicular to the optical axis.

[0181] (Configuration 11) The imaging device according to configuration 9 or 10, wherein the opening has a beam portion at a position that coincides with the boundary surface between the north pole and south pole of the magnet on a plane perpendicular to the optical axis. [Explanation of symbols]

[0182] 11: Image sensor 11 40: First image stabilization unit 40 20: Fixed part 20 20a: Front fixing part 20a 20b: Rear fixing part 20b 21: Base plate 21 22: Rear yoke 22 23a~23c: Front magnet 24a~24c: Post 30: Movable part 30 30a: Front movable part 30a 30b: Rear movable part 30b 31: First movable member 31 31a~31c: Support section 32: Second movable member 32 33a to 33c: Coil 41a~41c:Ball

Claims

1. a fixing member disposed in a main body of the imaging device; a magnet held by the fixing member; An imaging element; a first movable member that holds the image sensor and is movable relative to the fixed member in a direction perpendicular to an optical axis of the image sensor; a coil held by the first movable member and disposed at a position facing the magnet, a part of the fixed member is disposed at a position sandwiched between the image sensor and the first movable member in the direction of the optical axis, An imaging device, characterized in that a portion of the coil is arranged to overlap the imaging element on a projection plane perpendicular to the optical axis.

2. the magnet is disposed at a position sandwiched between the imaging element and the first movable member in the direction of the optical axis, 2. The imaging device according to claim 1, wherein a portion of the magnet is disposed on the projection surface so as to overlap the imaging element.

3. 2. The imaging device according to claim 1, wherein the fixing member is made of a magnetic material.

4. a yoke member held by the first movable member and disposed at a position facing the magnet; 2. The imaging device according to claim 1, wherein the first movable member is biased in a direction approaching the fixed member by the magnetic force of the yoke member and the magnet.

5. a plurality of rolling members arranged to abut against the first movable member and the fixed member; 2. The imaging device according to claim 1, wherein at least a portion of the rolling member is disposed on the projection surface so as to overlap the imaging element.

6. 2. The imaging device according to claim 1, wherein a portion of the coil is disposed so as to overlap the imaging element on the projection surface.

7. a second movable member that holds the imaging element and is fixed to the first movable member; 2. The imaging device according to claim 1, wherein the second movable member has a linear expansion coefficient greater than that of the first movable member.

8. a position detecting means for detecting the position of the first movable member; the position detection means is disposed on the imaging element or the second movable member, 8. The imaging device according to claim 7, wherein the magnet is disposed between the coil and the position detecting means in the direction of the optical axis.

9. 9. The imaging device according to claim 8, wherein the fixed member is made of a magnetic material and has an opening at a position facing the position detecting means.

10. 10. The imaging device according to claim 9, wherein the opening is larger than the amount of movement of the first movable member in a direction perpendicular to the optical axis.

11. 10. The imaging device according to claim 9, wherein the opening has a beam portion at a position that coincides with a boundary surface between the north pole and the south pole of the magnet on a plane perpendicular to the optical axis.

Images