JP2021144165A - Drive device, image blur correction device, and imaging device - Google Patents

Abstract

To provide a drive device that can be reduced in size.SOLUTION: In a drive device that comprises a fixed part 20a, a movable part 20b arranged so as to be movable in a plane with respect to the fixed part 20a via three rolling members, and an imaging element 11 held by the movable part 20b, and uses a plurality of actuators to drive the movable part 20b, the three rolling members are arranged so that the center of the imaging element 11 is located at the inner side of a triangle connecting the three rolling members, and the movement range of the movable part 20b is regulated by bringing one outer periphery of three enclosure parts provided on the movable part 20b to regulate the movement range of the three rolling members into contact with a regulating member 28 provided on the fixed part 20a.SELECTED DRAWING: Figure 7

Description

The present invention relates to a drive device using three actuators, an image blur correction device using the drive device, and an image pickup device including an image blur correction device.

In a driving device that moves a movable portion in a plane with respect to a fixed portion, a driving force generating portion having a configuration called a voice coil motor (VCM) method is widely used. In the VCM method, a magnet is arranged in one of a fixed portion and a movable portion, and a coil is arranged in the other, and a driving force is generated by energizing the coil in a magnetic circuit formed by the magnet.

Such a drive device is used, for example, in a blur correction mechanism mounted on an image pickup device. The image stabilization mechanism drives a movable portion on which an image sensor or a lens for image stabilization is mounted so as to cancel the detected blur based on the amount of blur detected by the blur detection unit (for example, Patent Documents). 1).

JP-A-2017-207785

For example, the drive device mounted on the image pickup device is required to be miniaturized. On the other hand, in the technique described in Patent Document 1, since the yoke is arranged even in a range where there is no VCM in order to prevent the movable portion from popping out, there is a problem that the entire drive device becomes large.

An object of the present invention is to provide a drive device capable of miniaturization.

The drive device according to the present invention is capable of rolling between a fixed portion having a fixing member, a movable portion having a movable member movably arranged with respect to the fixed portion, and the fixing member and the movable member. A first rolling member, a second rolling member, and a third rolling member that are arranged to allow the movable portion to move in a plane with respect to the fixed portion, and the movable portion is attached to the fixed portion. A first actuator, a second actuator, and a third actuator to be moved with respect to the first actuator are provided, and the first actuator is arranged along the first short side of a rectangular shape provided in the plane. A driving force is generated in a direction parallel to the first long side of the rectangular shape, and the second actuator and the third actuator are arranged side by side along the first long side in the plane. A driving device that generates a driving force in a direction parallel to the short side of 1, the first rolling member is arranged between the second actuator and the third actuator, and the second rolling member is arranged. The moving member is arranged near the intersection of the first short side and the second short side and the second long side facing the first long side, respectively, and the third rolling member is the first one. The center of the rectangular shape is arranged inside the triangle connecting the rolling member and the second rolling member, and the movable portion is provided on the movable member and the second rolling member is provided. The fixing portion has an enclosure portion that regulates the movement range of the movable member, and the fixing portion has a regulation member that is provided on the fixing member and regulates the movement range of the movable member. It is characterized in that the movement range of the movable portion in the plane is restricted by abutting against the restricting portion of 1.

According to the present invention, it is possible to provide a drive device capable of miniaturization.

It is a block diagram which shows the schematic structure of the image pickup apparatus which concerns on embodiment. It is a 1st exploded perspective view of the 1st blur correction unit of an image pickup apparatus. FIG. 5 is an exploded perspective view of the blur correction unit of FIG. 2 as viewed from different directions. FIG. 3 is an external perspective view of a pillar member constituting the blur correction unit of FIG. 2. It is an exploded perspective view of the movable part constituting the blur correction unit of FIG. FIG. 3 is an external perspective view of a movable portion constituting the blur correction unit of FIG. 2. It is a top view which looked at the movable part of the blur correction unit of FIG. 2 from the back side. It is a perspective view of the regulation member and the fastening member in the blur correction unit of FIG. 2 is a side view and a cross-sectional view of the blur correction unit of FIG. FIG. 3 is an external perspective view of a movable portion constituting the blur correction unit of FIG. 2. It is a 1st external perspective view of the main body part of the image pickup apparatus which concerns on 2nd Embodiment. It is a second external perspective view of the main body part of FIG. It is an exploded perspective view which shows the internal structure of the main body part of FIG. It is a rear view which shows the state which the 1st blur correction unit in 2nd Embodiment is attached to a base member. It is a figure which shows the regulation member and elastic member of the blur correction unit of FIG. It is a top view of the blur correction unit of FIG. It is a graph explaining the reaction force with respect to the displacement of the fixing member of the blur correction unit of FIG. It is a front view and the cross-sectional view of the 1st blur correction unit in 3rd Embodiment. It is a rear view of the drive FPC which constitutes the blur correction unit of FIG. It is a front view of the fixed part which constitutes the blur correction unit of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, a configuration in which the drive device according to the present invention is applied to an image blur correction device in an image pickup device will be described.

<First Embodiment>
FIG. 1 is a block diagram showing a schematic configuration of the image pickup apparatus 10 according to the first embodiment. The image pickup apparatus 10 is roughly composed of an image pickup apparatus main body 10a (hereinafter referred to as "main body portion 10a") and an interchangeable lens 10b that can be attached to and detached from the main body portion 10a.

The main body 10a includes an image sensor 11 having an image pickup surface 11a on the subject (not shown) side, a mount member 13a, a camera control unit 14, a first vibration detection unit 16a, a first blur correction control unit 15a, and an image processing unit. 17. The first blur correction unit 20 and the base member 130 are provided. The interchangeable lens 10b includes an imaging optical system 12 having a blur correction lens 12b, a mount member 13b, a second blur correction control unit 15b, a second vibration detection unit 16b, and a second blur correction unit 60.

The optical axis 12a shown in FIG. 1 represents an imaging optical axis that irradiates the imaging surface 11a with incident light via the imaging optical system 12, passes through a substantially center of the imaging surface 11a of the image sensor 11, and It is orthogonal to the image pickup surface 11a. Further, for convenience, a plane orthogonal to the optical axis 12a is referred to as an "optical axis orthogonal plane 12c" and is used in the following description. In other words, the optical axis orthogonal plane 12c is a plane parallel to the image pickup surface 11a of the image pickup device 11. The optical axis 12a is defined as a positive direction in a direction toward the subject (direction from right to left in FIG. 1).

The image sensor 11 is a CMOS sensor, a CCD sensor, or the like, and generates an image signal by photoelectrically converting an optical image of a subject imaged on the image pickup surface 11a through the image pickup optical system 12. The image signal output from the image sensor 11 is converted into image data by performing various processes in the image processing unit 17, and is stored in a storage medium (not shown).

The image pickup optical system 12 is composed of a plurality of lens groups (not shown) in the interchangeable lens 10b including the blur correction lens 12b, and forms an image of incident light from the subject on the image pickup surface 11a of the image pickup element 11. In order to accurately arrange the image sensor 11 with respect to the optical axis 12a, both the interchangeable lens 10b and the image sensor 11 are connected to a base member 130 provided inside the main body 10a. At that time, the image sensor 11 is connected to the base member 130 via the first blur correction unit 20. Further, the interchangeable lens 10b is connected to the base member 130 via the mount member 13b on the interchangeable lens 10b side and the mount member 13a on the main body portion 10a side.

The camera control unit 14 is a microcomputer including a CPU, ROM, RAM, and the like. The camera control unit 14 comprehensively controls the operation of the image pickup apparatus 10 by expanding the program stored in the ROM into the RAM and performing various calculations to control the operation of each portion of the image pickup apparatus 10. For example, the camera control unit 14 controls operations related to various types of shooting in the image pickup apparatus 10, operations in response to input operations by the user, and display operations. In the present embodiment, the camera control unit 14 performs a control operation other than the control operation by the control unit having a special explanation and a detection operation other than the detection operation by the detection unit having a special explanation.

In the image pickup apparatus 10, the first blur correction unit 20 translates or rotationally moves the image pickup element 11 along the optical axis orthogonal plane 12c so as to cancel the vibration (vibration) detected by the first vibration detection unit 16a. Further, the second blur correction unit 60 translates the blur correction lens 12b along the optical axis orthogonal plane 12c so as to cancel the vibration (vibration) detected by the second vibration detection unit 16b.

For example, if camera shake occurs during imaging while holding the image pickup device 10, the imaging position of the subject optical image on the image pickup surface 11a of the image pickup device 11 changes, and the image pickup image is blurred. When the blur is small, the change in the imaging position of the subject optical image is uniform in the imaging surface 11a, and can be regarded as translational or rotational movement (image plane blur) in the optical axis orthogonal plane 12c. Therefore, by moving the image sensor 11 in translation or rotation along the optical axis orthogonal plane 12c so as to cancel the image plane blur, the image plane blur can be corrected and an image without blur can be imaged.

Similarly, the optical axis 12a can be refracted by translating the blur correction lens 12b along the optical axis orthogonal plane 12c. Therefore, blur correction can be performed by translating the blur correction lens 12b within the optical axis orthogonal plane 12c so as to cancel the image plane blur. Since the more detailed principle and control of blur correction are well known, the description thereof will be omitted. Further, detailed configurations of the first blur correction unit 20 and the second blur correction unit 60 will also be described later.

The first blur correction control unit 15a controls the drive of the first blur correction unit 20 based on the blur information of the main body 10a detected by the first vibration detection unit 16a. Further, the second blur correction control unit 15b controls the drive of the second blur correction unit 60 based on the blur information of the interchangeable lens 10b detected by the second vibration detection unit 16b.

The first vibration detection unit 16a is composed of a gyro sensor, an acceleration sensor, and the like, and detects the angular velocity and acceleration in each direction of the image pickup apparatus 10. Similarly, the second vibration detection unit 16b is composed of a gyro sensor, an acceleration sensor, and the like, and detects the angular velocity and acceleration of the interchangeable lens 10b in each direction. The first blur correction control unit 15a performs an integral calculation of the angular velocity and acceleration detected by the first vibration detection unit 16a, and calculates the amount of change in angle and the amount of movement of the image pickup device 10 in each direction as blur information. Then, the first blur correction control unit 15a calculates the movement target value of the image sensor 11 based on the calculated blur information, and controls the drive of the first blur correction unit 20. The second blur correction control unit 15b performs the same control as the first blur correction control unit 15a.

The image pickup apparatus 10 includes a first blur correction unit 20 and a second blur correction unit 60, but may be configured to include only one of them. In that case, of the main body 10a and the interchangeable lens 10b, those not used for blur correction are fixedly arranged with respect to the optical axis 12a.

Next, the first blur correction unit 20 will be described in detail. 2 and 3 are exploded perspective views of the first blur correction unit 20, respectively, and the directions in which the first blur correction unit 20 is viewed are opposite to each other in FIGS. 2 and 3.

The first blur correction unit 20 has a fixed portion 20a and a movable portion 20b movably arranged in a plane orthogonal to the optical axis 12a with respect to the fixed portion 20a.

The fixing portion 20a includes a fixing member 21, a first frame member 22a, a second frame member 22b, a third frame member 22c, a first magnet group 23a, a second magnet group 23b, and a third magnet group 23c. Have. The fixing member 21 is provided with a first opening 21a, a second opening 21b, and a third opening 21c. The first frame member 22a is externally engaged with the first opening 21a, and similarly, the second frame member 22b is engaged with the second opening 21b and the third frame member 22c is engaged with the third opening 21c. Are engaged. The first magnet group 23a engages with the inner shape of the first frame member 22a, and similarly, the second magnet group 23b is engaged with the second frame member 22b and the third magnet group 23b is engaged with the third frame member 22c. Magnet group 23c is engaged. The first magnet group 23a, the second magnet group 23b, and the third magnet group 23c each form a Halbach magnetic circuit by three magnets having different magnetizing directions.

The fixing portion 20a includes a first rear yoke 25a, a second rear yoke 25b, a plurality of spacer members 24, a second fastening member 26, a first pillar member 27a, a second pillar member 27b, and a third pillar member 27c. Has. The first rear yoke 25a covers the first magnet group 23a, and the second rear yoke 25b covers the second magnet group 23b and the third magnet group 23c on the projection plane onto the optical axis orthogonal plane 12c. Have been placed. Further, the positions of the first rear yoke 25a and the second rear yoke 25b in the optical axis direction are defined by abutting against the spacer member 24 arranged between the fixing member 21. In addition, "on the plane projected on the plane orthogonal to the optical axis 12c" means "on the plane projected on the plane orthogonal to the optical axis 12c when viewed from the direction of the optical axis".

FIG. 4 is an external perspective view of the first pillar member 27a. The first column member 27a has a contact surface 271. The structure of the second pillar member 27b and the third pillar member 27c is the same as the structure of the first pillar member 27a. The first pillar member 27a, the second pillar member 27b, and the third pillar member 27c are engaged with the fixing member 21 when the contact surface 271 abuts on the fixing member 21, and the positions in the optical axis direction are changed. Is regulated.

As described above, the positions of the first rear yoke 25a and the second rear yoke 25b are defined by the plurality of spacer members 24 with respect to the fixing member 21. Further, the positions of the first pillar member 27a, the second pillar member 27b, and the third pillar member 27c are respectively defined with respect to the fixing member 21 by the contact surface 271. At each position defined in this way, the first rear yoke 25a is fixed to the first pillar member 27a and the second pillar member 27b by the second fastening member 26 with the fixing member 21 interposed therebetween. Further, at the position defined in this way, the second rear yoke 25b is fixed to the third pillar member 27c by the second fastening member 26 with the fixing member 21 interposed therebetween. In this way, the first rear yoke 25a, the second rear yoke 25b, the first pillar member 27a, the second pillar member 27b, and the third pillar member 27c are fixed to the fixing member 21.

The first magnet group 23a, the second magnet group 23b, and the third magnet group 23c each have a flange portion 231. The first magnet group 23a, the second magnet group 23b, and the third magnet group 23c are fixed by the fixing member 21, the first rear yoke 25a, and the second rear yoke 25b pressing the flange portion 231. .. In the first blur correction unit 20, a plurality of magnets are arranged so as to form a Halbach magnetic circuit, but a configuration different from that of the Halbach magnetic circuit, for example, a configuration in which a plurality of poles are magnetized in one magnet. It may be.

The fixing portion 20a further includes a regulating member 28, a first fastening member 29, a front yoke 30 and a magnet 31. The regulating member 28 is fixed to the fixing member 21 by the first fastening member 29. The regulating member 28 and the first fastening member 29 regulate the movement of the movable portion 20b, the details of which will be described later. The front yoke 30 is fixed to the first pillar member 27a, the second pillar member 27b, and the third pillar member 27c by the second fastening member 26. The magnet 31 is fixed to the fixing member 21 with an adhesive or the like.

FIG. 5 is an exploded perspective view of the movable portion 20b. The movable portion 20b has a movable member 32 and an image pickup element 11, and the image pickup element 11 is fixed to the movable member 32 with an adhesive or the like. The holder member 35 and the holder sheet metal 36 hold the first mask 33a, the second mask 33b, the infrared absorption filter 34a, and the optical low-pass filter 34b, and are fixed to the image sensor 11 with an adhesive member or the like. The first mask 33a and the second mask 33b prevent light from entering the image sensor 11 from outside the photographing optical path. The optical low-pass filter 34b is provided with a vibration mechanism 37 that removes foreign matter (dust, etc.) adhering to the surface due to vibration. Since the configuration and drive control of the vibration mechanism 37 are well known, description thereof will be omitted.

The movable portion 20b also has a first coil 38a, a second coil 38b, a third coil 38c, and a drive flexible printed circuit board 39 (hereinafter referred to as "drive FPC 39"). The movable member 32 has a first opening 32a, a second opening 32b, and a third opening 32c. The first coil 38a is arranged in the first opening 32a, the second coil 38b is arranged in the second opening 32b, and the third coil 38c is arranged in the third opening 32c. Is fixed to.

The drive FPC 39 is arranged so as to cover the first coil 38a, the second coil 38b, and the third coil 38c on the projection plane onto the optical axis orthogonal plane 12c, and is fixed to the movable member 32 with an adhesive or the like. NS. The first coil 38a, the second coil 38b, and the third coil 38c are each electrically connected to the drive FPC 39, and supply of a drive signal determined by the first blur correction control unit 15a via the drive FPC 39. Receive.

The movable portion 20b further includes a first suction sheet metal 40a, a second suction sheet metal 40b, and a third suction sheet metal 40c. The first suction sheet metal 40a and the second suction sheet metal 40b are fixed to the drive FPC 39 with an adhesive or the like. The first suction sheet metal 40a and the second suction sheet metal 40b overlap the first magnet group 23a and the third magnet group 23c on the projection plane on the optical axis orthogonal plane 12c, respectively. In this way, the first suction sheet metal 40a is attracted to the first magnet group 23a, and the second suction sheet metal 40b is attracted to the third magnet group 23c, so that the first urging force is generated in the movable portion 20b. There is. The third suction sheet metal 40c is fixed to the movable member 32 by the second fastening member 26. The third suction sheet metal 40c faces the magnet 31 of the fixed portion 20a, and is attracted to the magnet 31 to generate a second urging force on the movable portion 20b.

FIG. 6 is an external perspective view of the movable portion 20b. The drive FPC 39 is provided with a first detector 41a, a second detector 41b and a third detector 41c. The first detector 41a is arranged inside the first coil 38a, the second detector 41b is arranged inside the second coil 38b, and the third detector 41c is arranged inside the third coil 38c. ing. The first detector 41a, the second detector 41b, and the third detector 41c are Hall elements, respectively, and detect the magnetic force of the magnets facing each other. The first blur correction control unit 15a is the optical axis orthogonal plane 12c of the movable portion 20b with respect to the fixed portion 20a based on the detection signals from the first detector 41a, the second detector 41b and the third detector 41c. Calculate the upper position.

In the first blur correction unit 20, the first rolling member 42a, the second rolling member 42b, and the third rolling member 42c are provided on the movable member 32, respectively. It is rotatably arranged inside the second enclosure 32e and the third enclosure 32f. Each enclosure regulates the range of movement of rolling members arranged within it.

Due to the above-mentioned first urging force and the second urging force generated in the movable portion 20b, the movable portion 20b passes through the first rolling member 42a, the second rolling member 42b and the third rolling member 42c. , Is urged by the fixing member 21. When the movable portion 20b moves with respect to the fixed portion 20a, the first rolling member 42a, the second rolling member 42b, and the third rolling member 42c roll, so that almost no friction load is generated. ..

The VCM is configured by the first coil 38a facing the first magnet group 23a, the second coil 38b facing the second magnet group 23b, and the third coil 38c facing the third magnet group 23c. Has been done. Hereinafter, the driving force generating unit including the first coil 38a and the first magnet group 23a will be referred to as a "first actuator 43a". Similarly, the driving force generating unit composed of the second coil 38b and the second magnet group 23b is the "second actuator 43b", and the driving force generating unit composed of the third coil 38c and the third magnet group 23c is It is called a "third actuator 43c".

The front yoke 30 is provided in the direction opposite to the first magnet group 23a, the second magnet group 23b, and the third magnet group 23c with respect to the movable portion 20b. In this way, the front yoke 30 plays a role of forming a closed magnetic path with the first magnet group 23a, the second magnet group 23b, and the third magnet group 23c. The first rear yoke 25a, the second rear yoke 25b, and the front yoke 30 are on the projection plane on the optical axis orthogonal plane 12c, and are the sides of the two outer peripheral sides of the image pickup element 11 where the actuator is not arranged. Not placed in. With such a configuration, the size of the first blur correction unit 20 can be reduced.

In the first blur correction unit 20 configured as described above, the fixed portion 20a supports the movable portion 20b with three degrees of freedom, and the movable portion 20b translates and translates relative to the fixed portion 20a in the drive plane. Can rotate. Since the movable portion 20b holds the image pickup element 11, the fixing portion 20a is fixed to the base member 130, so that the image pickup element 11 can be translated and rotated in the optical axis orthogonal plane 12c. That is, the first blur correction unit 20 is configured as a drive device (so-called XYθ stage) capable of triaxial drive control.

On the other hand, although detailed description is omitted, the second blur correction unit 60 has a fixed portion and a movable portion like the first blur correction unit 20, and has a plurality of driving force generating portions. The movable portion is supported with two degrees of freedom with respect to the fixed portion and can be translated relative to the fixed portion in the drive plane. The fixed portion is fixed to the base member 130 via the housing of the interchangeable lens 10b and the mount members 13a and 13b, and the movable portion holds the blur correction lens 12b so that the blur correction lens 12b has an optical axis. It can be translated on the orthogonal plane 12c. That is, the second blur correction unit 60 is configured as a drive device (so-called XY stage) capable of biaxial drive control.

Next, the arrangement of various members in the first blur correction unit 20 and the like will be described in detail. The image pickup element 11 has a substantially rectangular shape on the projection plane on the optical axis orthogonal plane 12c, and therefore, as shown in FIG. 6, the direction (long side) orthogonal to the short side in the optical axis orthogonal plane 12c. The direction parallel to the long side is defined as the X direction, and the direction orthogonal to the long side (the direction parallel to the short side) is defined as the Y direction.

FIG. 7 is a plan view of the movable portion 20b as viewed from the back side of the imaging surface 11a. The first actuator 43a is located along the short side in the X direction of the image pickup device 11. Lorentz force is generated in the direction orthogonal to the magnetic field generated from the first magnet group 23a in the optical axis direction (direction orthogonal to the paper surface) and the current flowing through the first coil 38a, and the energization direction of the first coil 38a. The direction of the Lorentz force is changed accordingly. In this way, the first actuator 43a generates a driving force in the X direction. At this time, the first detector 41a detects the change in the magnetic force of the first magnet group 23a in the X direction, and the first blur correction control unit 15a uses the detection result to position the movable portion 20b in the X direction. Is calculated.

The second actuator 43b and the third actuator 43c are located side by side along the long side in the Y direction of the image pickup device 11. Lorentz force is generated in the direction orthogonal to the magnetic field generated from the second magnet group 23b and the third magnet group 23c in the optical axis direction and the current flowing through the second coil 38b and the third coil 38c. The direction of the Lorentz force is changed according to the energization direction of the second coil 38b and the third coil 38c. In this way, the second actuator 43b and the third actuator 43c generate a driving force in the Y direction.

Further, the second actuator 43b and the third actuator 43c are located at positions that are substantially symmetrical about the optical axis 12a in the X direction (positions that are line symmetric with respect to a line passing through the optical axis 12a and parallel to the Y direction). be. Therefore, by providing a difference in driving force between the second actuator 43b and the third actuator 43c, it is possible to generate a rotational force around the optical axis 12a in the movable portion 20b. The second detector 41b and the third detector 41c detect changes in the magnetic force of the second magnet group 23b and the third magnet group 23c in the Y direction, respectively, and use the detection results to detect the change in the magnetic force of the first magnet group 23b and the third magnet group 23c, respectively. The blur correction control unit 15a calculates the position of the movable unit 20b in the Y direction and the rotation angle around the optical axis.

The first enclosure 32d is located between the second actuator 43b and the third actuator 43c. The movable member 32 has a recess 32g on the side far from the image pickup device 11 in the Y direction of the first enclosure 32d. The recess 32g forms a space that does not come into contact with the movable portion 20b even if the movable portion 20b moves. Therefore, the size of the main body 10a can be reduced by arranging, for example, a fastening portion (not shown) for attaching the main body 10a to the tripod in the space formed by the recess 32g.

As shown in FIG. 7, among the short sides of the image sensor 11, the side on the side where the first actuator 43a is arranged is referred to as the "first short side 11b", and the other short side is referred to as the "second short side". It is defined as "11d". Further, among the long sides of the image sensor 11, the side on the side where the second actuator 43b and the third actuator 43c are arranged is referred to as the "first long side 11c", and the other long side is referred to as the "second long side". It is defined as "side 11e".

At this time, the second enclosed portion 32e is placed outside the second long side 11e along the side of the second long side 11e in the vicinity of the apex where the second short side 11d and the second long side 11e intersect. Place in. As a result, a space that does not come into contact with the movable portion 20b even if it moves can be formed along the second short side 11d. As shown in FIG. 7, for example, a shutter device 50 or the like can be arranged in this space, whereby the main body portion 10a can be miniaturized.

The third enclosure 32f is formed at the center of the first enclosure 32d, the center of the second enclosure 32e, and the center of the third enclosure 32f on the projection plane onto the optical axis orthogonal plane 12c. It is arranged so that the center of the image pickup device 11 is located inside the first triangle 44. The center of the image pickup device 11 of the third suction sheet metal 40c is located inside the second triangle 45 formed by the first suction sheet metal 40a, the second suction sheet metal 40b, and the third suction sheet metal 40c. Arranged like this. By positioning the center of the image pickup element 11 inside the first triangle 44 and the second triangle 45 in this way, the deviation of the parallelism of the image pickup surface 11a with respect to the optical axis orthogonal plane 12c due to the variation of the parts is suppressed, and the interchangeable lens. The image formation from 10b to the imaging surface 11a can be stabilized.

Next, the movement restriction of the movable portion 20b in the first blur correction unit 20 will be described. As described above, the movable portion 20b moves within a certain range in order to perform blur correction, but when the movable portion 20b receives an external force equal to or greater than the force generated by each actuator within the optical axis orthogonal plane 12c, the movable portion 20b is moved. There is a risk that 20b will reach outside the moving range. Further, when the movable portion 20b receives an external force exceeding the urging force generated in the optical axis direction in the positive direction of the optical axis (direction toward the subject), the movable portion 20b does not come into contact with the rolling member and moves toward the subject. It will move. If the movable portion 20b is driven in such a state, there is a high possibility that a failure will occur. Therefore, a mechanism for restricting the movement of the movable portion 20b within the optical axis orthogonal plane 12c and in the direction of the optical axis a is required.

Therefore, in the first blur correction unit 20, the movable member 32 is provided with the first contact surface 32h, and the first pillar member 27a, the second pillar member 27b, and the third pillar member 27b are provided on the first contact surface 32h. The column members 27c are brought into contact with each other (see FIGS. 2, 3 and 6). As a result, the range of movement of the movable portion 20b in the optical axis orthogonal plane 12c in an arbitrary direction is restricted. Further, the first actuator 43a is sandwiched between the first pillar member 27a and the second pillar member 27b, and the second actuator 43b and the third actuator 43c are sandwiched between the second pillar member 27b and the third pillar member 27c. It is arranged so as to sandwich it. Therefore, each pillar member receives an external force and the action of the external force on the actuator can be reduced, so that the movement of the movable portion 20b due to the external force can be suppressed.

FIG. 8 is a perspective view of the regulating member 28 and the first fastening member 29. 9 (a) is a side view of the first blur correction unit 20, and FIG. 9 (b) is a cross-sectional view taken along the line AA shown in FIG. 9 (a). The first fastening member 29 has a fastening portion 29a, and the regulating member 28 is fixed to the fixing member 21 by engaging the fastening portion 29a with the fixing member 21. The regulating member 28 has a first wall portion 28a and a second wall portion 28b, and the first fastening member 29 has a regulating portion 29b. Further, the movable member 32 has a contact portion 32i formed as an outer wall of the second enclosure portion 32e. The contact portion 32i is arranged so as to be surrounded by the first wall portion 28a, the second wall portion 28b, and the regulation portion 29b, and the contact portion 32i and the first wall portion 28a come into contact with each other to form an optical axis orthogonal plane. The range of movement of the movable portion 20b in the X direction on 12c is restricted. Further, when the contact portion 32i abuts on the second wall portion 28b and the regulation portion 29b, the movement range of the movable portion 20b in the Y direction on the optical axis orthogonal plane 12c is restricted. Here, since the contact portion 32i is provided so as to cover the second enclosure portion 32e on the projection plane on the plane orthogonal to the optical axis 12c, space saving (that is, the first blur correction unit 20 (Miniaturization) is being planned.

By restricting the movement of the movable portion 20b at a plurality of locations on the outer periphery of the image pickup device 11 in this way, it is possible to suppress the movable portion 20b from jumping out in the optical axis orthogonal plane 12c. It should be noted that the regulating portion 272 (see FIG. 4) and the contact portion 32i of the first pillar member 27a, the second pillar member 27b, and the third pillar member 27c are formed of an elastic body such as rubber at the time of contact. By making it possible to absorb the impact of the rubber, it is possible to suppress damage and the generation of impact noise.

FIG. 10 is a perspective view showing the appearance of the movable portion 20b by reversing the surface mainly shown in FIG. The movable member 32 has a second contact surface 32j, and the second contact surface 32j faces the front yoke 30 on the projection surface on the optical axis orthogonal plane 12c even at the position after the movable portion 20b is moved. It is provided to do so. Further, the regulating member 28 has a third wall portion 28c (see FIG. 9A), and the movable member 32 has a third contact surface 32k. The third contact surface 32k is provided so as to face the third wall portion 28c on the projection surface on the optical axis orthogonal plane 12c even at the position after the movable portion 20b is moved.

Therefore, even when an external force equal to or greater than the urging force generated in the optical axis direction is applied to the movable portion 20b in the positive direction of the optical axis, the second contact surface 32j abuts on the front yoke 30 and the second contact surface 32j abuts on the movable portion 20b. The contact surface 32k of 3 comes into contact with the third wall portion 28c. In this way, the movement of the movable portion 20b is restricted, and it is possible to suppress the movable portion 20b from jumping out in the positive direction of the optical axis. Further, the movable portion 20b protrudes in the positive direction of the optical axis from the second contact surface 32j and the front yoke 30 to the first short side 11b and the first long side 11c with the third contact surface 32k. The third wall portion 28c regulates each of the vicinity of the intersection of the second short side 11d and the second long side 11e. As a result, it is possible to prevent the movable portion 20b from tilting more than necessary, and to prevent each rolling member from falling out of each enclosure.

<Second Embodiment>
In the second embodiment, a configuration for suppressing deformation of the fixing member 21 of the first blur correction unit 20 when the image pickup apparatus 10 falls and collides will be described. In the following description of the second embodiment, among the components of the imaging device according to the second embodiment, those equivalent to the components of the imaging device according to the first embodiment are described in the first embodiment. The same code as the one used will be used.

FIG. 11 is a perspective view showing the appearance of the main body 10a of the image pickup apparatus according to the second embodiment as viewed from the front side (subject side (not shown)). FIG. 12 is a perspective view showing the appearance of the main body 10a of the image pickup apparatus according to the second embodiment as viewed from the back side. 11 and 12 are shown in a state where the interchangeable lens 10b is removed from the main body 10a.

The main body 10a includes a display 102, a touch panel 103, an external viewfinder 104, a shutter button 105, a mode changeover switch 106, a terminal cover 107, a main electronic dial 108, a rear operation unit 109, a power switch 110, and a sub electronic dial 111. Have. The main body 10a includes a selection member 126, a moving image button 114, an AE lock button 115, an enlargement button 116, a play button 117, a menu button 119, an eyepiece 121, an eyepiece detection unit 123, a lid 124, a grip 125, and a lock button 127. Has.

The display unit 102 is provided on the back surface of the main body unit 10a, and displays an image and various kinds of information. The touch panel 103 is superimposed on the display unit 102, and detects a touch operation on the display surface (operation surface). The outside viewfinder display unit 104 is provided on the upper surface of the main body unit 10a, and displays various set values such as a shutter speed and an aperture. The shutter button 105 is an operating member for giving a shooting instruction. The mode changeover switch 106 is an operation member for switching the shooting mode. The terminal cover 107 protects a connector (not shown) to which a connection cable or the like for connecting the external device and the main body 10a is attached / detached. The main electronic dial 108 is an operating member that changes set values such as a shutter speed and an aperture by rotating the dial 108. The power switch 110 is an operating member for switching the power on / off of the main body 10a.

The sub-electronic dial 111 is an operating member that moves a selection frame, feeds an image, or the like by rotating the dial. A rear operation unit 109 is provided on the back surface of the main body 10a, and the rear operation unit 109 includes a plurality of push buttons, a SET button 113, and a rear dial 112. The rear dial 112 is an operating member capable of changing set values such as shutter speed and aperture by rotating the dial 112. The SET button 113 is a push button mainly used for determining a selection item or the like.

The selection member 126 is a cross key (four-way key) capable of pushing each of the up / down / left / right parts, and the function corresponding to the pressed part is executed. The moving image button 114 is an operating member that gives an instruction to start / stop moving image shooting (recording). The AE lock button 115 is an operating member for fixing the exposed state in the shooting standby state. The magnifying button 116 is an operating member for turning on / off the magnifying mode in the live view (LV) display of the shooting mode. By operating the main electronic dial 108 after turning on the enlargement mode, the LV image can be enlarged or reduced. Further, the enlargement button 116 is used as an operating member for enlarging the reproduced image and increasing the enlargement ratio in the reproduction mode.

The play button 117 is an operation means for switching between the shooting mode and the play mode. When the play button 117 is pressed during the shooting mode, the camera control unit 14 shifts the operation mode to the play mode and displays the latest image among the images saved in the storage medium (not shown) on the display unit 102. .. The menu button 119 is an operation means for displaying various settable menu screens on the display unit 102 by pressing the button. The user can intuitively make various settings by using the menu screen displayed on the display unit 102, the rear dial 112, and the SET button 113.

The user can visually recognize the image displayed on the EVF 122 provided in the main body 10a via the eyepiece 121 provided for the eyepiece finder (look-ahead type finder). The eyepiece detection unit 123 is a sensor that detects whether or not the photographer is in contact with the eyepiece unit 121. The lid 124 protects a slot for a storage medium (not shown). The grip portion 125 is a grip portion having a shape that makes it easy for the user to hold the image pickup device 10 with his / her right hand. The shutter button 105 and the main electronic dial 108 are arranged at positions that can be operated by the index finger of the right hand while the grip portion 125 is gripped by the little finger, ring finger and middle finger of the right hand and the main body portion 10a is gripped. Further, in the same state, the sub electronic dial 111 and the selection member 126 are arranged at positions that can be operated by the thumb of the right hand.

The image sensor 11 is, for example, a so-called 35 mm full-size CMOS sensor having an effective region of approximately 24 mm × 36 mm. The mount member 13a is a structural member for attaching and detaching the interchangeable lens 10b to and from the main body 10a. A communication terminal 120 for communicating between the main body 10a and the interchangeable lens 10b is provided inside the mount member 13a in the main body 10a. The main body 10a is an interchangeable lens 10b, which is a lens capable of exposing the entire effective region of the full-size image pickup element 11 (full-size compatible lens) and a lens having a small exposure region (for example, an APS-C compatible lens). ) Each lens can be attached.

The lock button 127 holds (locks) the mounted state of the interchangeable lens 10b with respect to the main body 10a when the interchangeable lens 10b is mounted on the main body 10a. When the lock button 127 is pressed, the lock is released and the interchangeable lens 10b can be removed. The lock button 127 is arranged near the lateral side of the central portion of the diameter of the mount member 13a. The main body 10a is provided with strap insertion portions 190 through which a string-shaped member (not shown) such as a strap can be inserted, and the image pickup device 10 is hung (hanged on the shoulder or neck). It is possible to carry it.

Next, the internal configuration of the main body 10a will be described. FIG. 13 is an exploded perspective view showing the internal configuration of the main body portion 10a, and only the main components are extracted and shown. Inside the main body 10a, a base member 130, a shutter member 140, a main frame 150, and a main board 160 are arranged.

The base member 130 is made of a metal such as magnesium die-cast and has high rigidity. The mount member 13a is firmly fixed to the base member 130. The base member 130 is formed with first screw holes 131a, 131b, 131c, second screw holes 132a, 132b, 132c and third screw holes 133a, 133b, 133c, 133d.

The shutter member 140 arranged in the main body 10a opens / closes the front surface of the image pickup surface 11a by traveling the shutter curtain 142, so that the shutter member 140 passes through the interchangeable lens 10b to the image pickup element 11 for a predetermined time. The light is exposed to the imaging surface 11a. The shutter member 140 is provided with holes 141a, 141b, 141c, which are fixed to the first screw holes 131a, 131b, 131c of the base member 130 by screws 145a, 145b, 145c, respectively.

Holes 430a, 430b, 430c are formed in the fixing member 21 of the first blur correction unit 20 at positions corresponding to the second screw holes 132a, 132b, 132c of the base member 130. The fixing member 21 is fixed to the base member 130 by fixing the holes 430a, 430b, 430c with the fixing screws 431a, 431b, 431c in accordance with the second screw holes 132a, 132b, 132c.

High accuracy is required for the distance between the imaging surface 11a and the mount member 13a in the optical axis direction. Therefore, coil springs (not shown) or spacers (not shown) are arranged between the base member 130 and the fixing member 21 at the three positions of the fixing screws 431a, 431b, and 431c. Then, the position of the image pickup surface 11a of the image pickup element 11 can be adjusted with respect to the mount member 13a in the optical axis direction, and the tilt can be adjusted up, down, left, and right.

The main frame 150 is a sheet metal member made of a metal (aluminum, copper, etc.) having a high thermal conductivity. Holes 152a, 152b, 152c, and 153d are formed in the main frame 150.

The main board 160 is a circuit board having various electronic circuits for operating the image pickup apparatus 100, and various circuit components such as a CPU 164 and a card connector 169 are mounted on the surface of the main board 160. Further, a plurality of connectors 165, 166a, 166b, 167a, 167b, and 168 are mounted on the main board 160, and are electrically connected to a connecting member such as a drive FPC 39 to enable transmission of signals and power supplies. It has become. Holes 162a, 162b, 162c, 162d are further formed in the main substrate 160. The holes 152a, 152b, 152c, and 153d are aligned with the third screw holes 133a, 133b, 133c, and 133d, respectively, and fastened together with the screws 163a, 163b, 163c, and 163d to be fixed to the base member 130 of the main frame 150. Will be done.

FPC146 and lead wires 147a and 147b are attached to the shutter member 140, and these are connected to connectors 165, 166a and 166b of the main board 160, respectively. As a result, signals and power supplies can be transmitted between the main board 160 and the shutter member 140.

FIG. 14 is a rear view showing a state in which the first blur correction unit 20 is attached to the base member 130. Since the weight of the first blur correction unit 20 is large at the drive unit in which the first rear yoke 25a and the second rear yoke 25b are arranged, the screw fixing portion is arranged so that the drive unit is stably supported. NS. Specifically, the fixing screws 431a and 431c are arranged in the vertical direction (Y direction) of the first rear yoke 25a, and the fixing screws 431b and 431c are arranged in the left-right direction (X direction) of the second rear yoke 25b, respectively.

When the image pickup device 10 falls in the Z direction (positive direction of the optical axis), the fixing member 21 is fixed to the base member 130 by the fixing screws 431a, 431b, 431c in the holes 430a, 430b, 430c, so that the fixing screw The parts other than the above try to be greatly deformed. Therefore, on the XY plane of the first blur correction unit 20, the image sensor 11 is deformed in the vicinity of the intersection of the second short side 11d and the second long side 11e, which are farthest from the fixing screws 431a, 431b, 431c. It tends to grow. That is, the deformation of the fixing member 21 tends to be large at the location where the regulating member 28 is arranged in the first embodiment.

Therefore, in the present embodiment, the deformation of the fixing member 21 is reduced by making the configuration capable of absorbing the impact at the portion where the regulating member 28 is arranged. That is, by reducing the deformation of the fixing member 21, the distance between the imaging surface 11a and the mounting member 13a in the optical axis direction can be maintained with high accuracy. Specifically, as the shock absorbing member, the elastic member 510 is arranged on the regulating member 28, and subsequently, the regulating member 28 and the elastic member 510 will be described in detail.

FIG. 15A is a perspective view showing a state in which the elastic member 510 is arranged on the regulation member 28. FIG. 15B is a perspective view showing the regulating member 28 and the elastic member 510 in an exploded manner. The regulating member 28 has a fastening surface 28d, a second wall portion 28b, and a third wall portion 28c that are connected at substantially right angles when viewed from the X direction to form a U-shape. The fastening surface 28d is attached to the fixing member 21. The third wall portion 28c has an arm portion 501, and an elastic member 510 is arranged on the base member 130 side so as to cover the arm portion 501. The elastic member 510 is fixed to the regulation member 28 with, for example, double-sided tape. The material of the elastic member 510 is rubber, an elastomer, or the like, and in the present embodiment, a material having a rubber hardness of 50 ° is used, but the material is not limited to this.

FIG. 16A is a top view showing a state in which the first blur correction unit 20 is attached to the base member 130. 16 (b) is an enlarged view of the K portion shown in FIG. 16 (a). A contact portion 550 is provided on the base member 130 so as to face the elastic member 510 attached to the arm portion 501 of the regulation member 28. When the image pickup device 10 falls in the Z direction (positive direction of the optical axis) and collides with the image pickup device 10 and the fixing member 21 of the first blur correction unit 20 is deformed, the elastic member 510 arranged on the arm portion 501 of the regulation member 28 changes. It collides with the contact portion 550 of the base member 130. At that time, the elastic member 510 and the regulating member 28 absorb the impact at the time of collision, so that the deformation of the fixing member 21 is reduced (suppressed).

As shown in FIG. 16B, the gap between the contact portion 550 of the base member 130 and the elastic member 510 is “c11”, and the thickness of the elastic member 510 is “t1”. In order to enhance the impact absorption effect of the elastic member 510, it is desirable that t1> c11. In the present embodiment, the elastic member 510 is attached to the regulation member 28, but the elastic member 510 is arranged at the contact portion 550 of the base member 130 to provide a gap between the elastic member 510 and the regulation member 28. As a configuration, the same effect can be obtained.

FIG. 17 is a graph for explaining the reaction force of the regulating member 28 with respect to the displacement of the fixing member 21 at the location where the regulating member 28 is arranged when an impact is applied. In FIG. 17, “c11” is the gap between the elastic member 510 and the contact portion 550 of the base member 130 shown in FIG. 16 (b), and “s11” is the range that receives the reaction force of the elastic member 510, “s12”. "" And "S13" are ranges that receive the reaction force of the elastic member 510 and the regulating member 28.

When the location of the restricting member 28 is deformed in the fixing member 21 due to an impact force due to dropping or the like, there is a gap between the fixing member 21 (elastic member 510) and the contact portion 550 in the region of c11, so that the regulation is restricted. The member 28 does not receive a reaction force. When the fixing member 21 is further displaced and the contact portion 550 and the elastic member 510 begin to interfere with each other, the transition to the region of s11 occurs, and the regulating member 28 begins to receive the reaction force of the elastic member 510. In the region of s11, since it is the reaction force of the elastic member 510, the reaction force tends to increase exponentially, and the impact force is easily absorbed by converting the impact energy into the deformation energy.

When the fixing member 21 is further displaced and the elastic member 510 is compressed, the regulating member 28 is also elastically deformed in accordance with this and transitions to the region of s12. In the region of s12, the arm portion 501 of the regulating member 28 is elastically deformed as described with reference to FIG. When the fixing member 21 is further displaced, it transitions to the region of s13, and the regulating member 28 elastically deforms the second wall portion 28b and the third wall portion 28c with respect to the fastening surface 28d.

In this way, when the fixing member 21 is deformed by the impact force, the impact force is absorbed by the reaction force and the repulsive force of the elastic member 510, and the reaction force due to the elastic deformation of the regulating member 28 is generated stepwise. As a result, the impact force on the fixing member 21 is reduced. In this way, it is possible to suppress the transmission of the impact force to the fixing member 21 and suppress the plastic deformation of the fixing member 21. That is, since the fixing member 21 is not easily deformed, the distance between the imaging surface 11a and the mounting member 13a can be maintained with high accuracy.

<Third Embodiment>
In the third embodiment, a mechanism for preventing imaging noise due to a magnetic field generated by the first blur correction unit 20 and a ground connection configuration of a metal member included in the movable portion 20b will be described.

FIG. 18A is a front view (viewed from the subject side (not shown)) showing the structure of the first blur correction unit 20 in the third embodiment. FIG. 18B is a cross-sectional view taken along the line BB shown in FIG. 18A. FIG. 18 (c) is a cross-sectional view taken along the line CC shown in FIG. 18 (a).

First, the magnetic field generated by passing an electric current through the first coil 38a will be described with reference to FIG. 18 (b). An example of the flow of the magnetic field (magnetic flux) generated when a current is passed through the first coil 38a is shown by a solid line arrow 61 and a broken line arrow 62 in FIG. 18 (b). The movable member 32 is made of a highly conductive metal material such as magnesium die-cast and has a certain thickness, so that the magnetic flux does not pass through the movable member 32. Therefore, a part of the magnetic flux generated by passing an electric current through the first coil 38a travels between the first coil 38a and the movable member 32 as shown by an arrow 61.

The first blur correction unit 20 includes a shielding member 46 arranged on the movable portion 20b as a noise countermeasure member. If the shielding member 46 is not provided, a part of the magnetic field passing between the first coil 38a and the movable member 32 proceeds as shown by an arrow 62, reaches the image pickup surface 11a of the image pickup element 11, and reaches the image pickup element 11. There is a high possibility that noise will be generated in the signal of 11.

Therefore, in the present embodiment, the shielding member 46 is provided so as to cover the first coil 38a and the movable member 32. The shielding member 46 is made of aluminum or the like having a low permeability and a high conductivity, and has a certain thickness in order to prevent the transmission of magnetic flux. By arranging such a shielding member 46 so as to cover the first coil 38a and the movable member 32, the magnetic field traveling between the first coil 38a and the movable member 32 is transferred to the image pickup surface of the image pickup element 11. It is possible to prevent the vehicle from reaching 11a. As a result, it is possible to suppress the generation of noise in the signal of the image sensor 11.

Although the first coil 38a has been described so far, the shielding member 46 similarly covers between the second coil 38b and the movable member 32 and between the third coil 38c and the movable member 32. Therefore, it also prevents the magnetic flux generated from the second coil 38b and the third coil 38c from reaching the image pickup surface 11a of the image pickup device 11.

Both the shielding member 46 and the image sensor 11 form a part of the movable portion 20b. Therefore, when the shielding member 46 made of a metal material such as aluminum is not connected to the ground, if an excessive voltage is applied from the outside due to static electricity or the like, the performance of the image sensor 11 may be deteriorated. In other words, if the metal material is not ground-connected, the reliability of the image pickup apparatus 10 may decrease. Therefore, in the present embodiment, not only the shielding member 46 but also all the metal members constituting the movable portion 20b are connected to the ground, which will be described below with reference to FIGS. 18 and 19.

FIG. 19 is a rear view of the drive FPC 39. The shielding member 46 is adhered to the surface opposite to the surface on which the first coil 38a, the second coil 38b and the third coil 38c are mounted in the drive FPC 39, and the drive FPC 39 is adhered to the movable member 32. Has been held. The shielding member 46 and the drive FPC 39 are further fastened to and fixed to the movable member 32 by the first fastening member 47.

The cross-sectional view taken along the line CC in FIG. 18C is a cross-sectional view passing through the first fastening member 47. As shown in FIG. 18 (c), the first fastening member 47 has a head portion 47a and a screw portion 47b. Further, as shown in FIG. 19, the drive FPC 39 has an insertion hole 39a through which the first fastening member 47 is inserted, and a coverlay opening 39b provided around the insertion hole 39a. The coverlay opening 39b is a portion that opens the coverlay of the drive FPC 39 to expose the copper foil conductor portion, and at least a part of the coverlay opening 39b has a ground portion (ground wire).

As shown in FIG. 18C, the head 47a of the first fastening member 47 comes into contact with the shielding member 46, and the screwed portion 47b of the first fastening member 47 comes into contact with the movable member 32. When the shielding member 46 and the drive FPC 39 are pressed against the movable member 32 by the first fastening member 47, the coverlay opening 39b of the drive FPC 39 comes into contact with the movable member 32. Further, the drive FPC 39 is connected to a main board 160 (see FIG. 13) fixed to the base member 130.

In this way, the shielding member 46, the first fastening member 47, the movable member 32, the driving FPC 39, and the main board 160 are connected in this order to realize the ground connection of the shielding member 46. Further, as another metal member included in the movable portion 20b, a holder sheet metal 36 can be mentioned. As shown in FIG. 5, the holder sheet metal 36 is fastened to the movable member 32 via a second fastening member 26 which is a metal member. Will be done. Therefore, by connecting the holder sheet metal 36, the second fastening member 26, the movable member 32, the drive FPC 39, and the main board 160 in this order, the ground connection of the holder sheet metal 36 is realized. In the present embodiment, the second fastening member 26 and the first fastening member 47 are separate members, but the holder sheet metal 36 and the shielding member 46 are fastened on the projection plane on the optical axis orthogonal plane 12c. The positions may be overlapped and tightened together with a single fastening member.

Next, the arrangement of the first fastening member 47 and the front yoke 30 will be described with reference to FIGS. 18 and 20. FIG. 20 is a front view of the fixed portion 20a. In order to increase the driving efficiency of the magnetic circuit of the VCM, as shown in FIG. 20 on the projection plane on the optical axis orthogonal plane 12c, the front yoke 30 has a first magnet group 23a, a second magnet group 23b and a third magnet group 23b. It is desirable that the magnet group 23c is arranged so as to cover the magnet group 23c. Further, in the optical axis direction, it is desirable that the distance between the front yoke 30 and the first magnet group 23a, the second magnet group 23b, and the third magnet group 23c is close to each other.

Therefore, in the present embodiment, the notch portion 30a is formed in the front yoke 30 so as to be located outside the projection of the second magnet group 23b on the projection plane on the plane orthogonal to the optical axis 12c. Further, as shown in FIG. 18A, assuming that the movable range of the head 47a of the first fastening member 47 is the movable region 47c, the movable region 47c is the front surface on the projection plane on the optical axis orthogonal plane 12c. It is provided so as to overlap the notch 30a of the yoke 30. In this way, even when the first fastening member 47 moves, the first fastening member 47 and the front yoke 30 do not overlap on the projection plane on the optical axis orthogonal plane 12c.

Therefore, as shown in FIG. 18C, the front yoke 30 is arranged so as to overlap the first fastening member 47 by "z1" in the optical axis direction (when viewed from the X direction). .. This makes it possible to shorten the distance "z2" between the front yoke 30 and the second magnet group 23b in the optical axis direction.

When a magnetic material is used for the first fastening member 47, the second magnet group 23b may generate an attractive force on the first fastening member 47. Then, when a suction force is applied to the first fastening member 47, the neutral point of the movable portion 20b may shift from the state shown in FIG. 18C to a position moved to the left side (−X direction). Then, while the image pickup device 10 is in the power-on state, it is desirable to hold the image pickup element 11 at the center position (the position where the optical axis 12a passes through the center of the image pickup surface 11a), so that the movable portion 20b is on the right side. It becomes necessary to constantly apply force to move it in the (+ X direction). As a result, power consumption increases and drive efficiency also decreases.

In order to avoid the occurrence of such a problem, a non-magnetic material is used for the first fastening member 47 in the present embodiment. Specifically, an otesnite-based stainless steel material is used. By using a non-magnetic material for the first fastening member 47, it is possible to prevent the movable portion 20b from being unnecessarily attracted to the second magnet group 23b and suppress an increase in power consumption.

As described above, in the present embodiment, the first fastening member 47 is arranged, and the front yoke 30 has the first magnet group 23a, the second magnet group 23b, and the second magnet group 23b on the projection plane on the optical axis orthogonal plane 12c. It is configured to cover the magnet group 23c of 3. Further, in the optical axis direction, the distance between the front yoke 30 and the first magnet group 23a, the second magnet group 23b, and the third magnet group 23c is brought close to each other. Further, by using a non-magnetic material for the first fastening member 47, it is possible to prevent unnecessary suction force from being generated in the movable portion 20b. With these configurations, it is possible to improve the driving efficiency of the magnetic circuit of the VCM and to improve the reliability of the image pickup apparatus 10.

Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various embodiments within the scope of the gist of the present invention are also included in the present invention. included. Further, each of the above-described embodiments shows only one embodiment of the present invention, and each embodiment can be combined as appropriate. For example, from the relationship between the size of the rectangular shape and the size of the actuator, two actuators may be arranged along the short side and one actuator may be arranged along the long side.

10 Image sensor 11 Image sensor 12b Image stabilization lens 20 First image stabilization unit 20a Fixed part 20b Movable part 21 Fixing member 26 Second fastening member 28 Regulatory member 32 Movable member 32e Second enclosure 32i Contact part 42a 1st rolling member 42b 2nd rolling member 42c 3rd rolling member 43a 1st actuator 43b 2nd actuator 43c 3rd actuator

Claims (25)

A fixing part having a fixing member and
A movable portion having a movable member movably arranged with respect to the fixed portion,
A first rolling member, a second rolling member, and a third that are rotatably arranged between the fixed member and the movable member to allow the movable portion to move in a plane with respect to the fixed portion. Rolling member and
A first actuator, a second actuator, and a third actuator for moving the movable portion with respect to the fixed portion are provided.
The first actuator is arranged along one of the first short side and the first long side of the rectangular shape provided in the plane, and the first short side and the first long side of the rectangular shape are arranged. A driving force is generated in a direction parallel to the other of the above, and the second actuator and the third actuator are arranged side by side along the other of the first short side and the first long side in the plane. A driving device that generates a driving force in a direction parallel to one of the first short side and the first long side.
The first rolling member is arranged between the second actuator and the third actuator, and the second rolling member faces the first short side and the first long side, respectively. The third rolling member is arranged near the intersection of the second short side and the second long side, and the third rolling member is the rectangle inside the triangle connecting the first rolling member and the second rolling member. Arranged so that the center of the shape is located,
The movable portion has an enclosure portion provided on the movable member and restricting the movement range of the second rolling member.
The fixing portion has a regulating member provided on the fixing member to regulate the moving range of the movable member.
A drive device characterized in that the range of movement of the movable portion in the plane is restricted by abutting the outer wall of the enclosure portion with the first regulating portion of the regulating member. The restricting member includes a second restricting portion that regulates the movement of the movable portion in a direction orthogonal to the plane by contacting the enclosure portion when the movable portion moves in a direction orthogonal to the plane. The drive device according to claim 1, wherein the drive device has. The fixing portion has a fastening member for fastening the regulating member to the fixing member.
The fastening member has a fastening portion and a third regulating portion.
The regulating member is fastened to the fixing member at the fastening portion, and is fastened to the fixing member.
The third regulating portion is characterized in that when the movable member moves in the plane, the movable portion is in contact with the outer wall of the enclosure to regulate the movement of the movable portion in the plane. 2. The drive device according to 2. A base member for holding the fixing member is provided.
An elastic member is arranged on either the regulating member or the surface of the base member facing the regulating member.
3. The third aspect of the present invention is characterized in that a predetermined gap is provided between the surface of the elastic member, the base member facing each other, and the surface of the regulation member on which the elastic member is not arranged. The drive device described. The driving device according to claim 4, wherein the gap is smaller than the thickness of the elastic member. In the regulating member, the second regulating portion and the third regulating portion are provided at substantially right angles to the fastening surface fastened to the fixing member, respectively.
The driving device according to claim 4 or 5, wherein the elastic member is attached to a surface facing the base member in the third regulating portion. The third regulating portion of the regulating member has an arm portion and has an arm portion.
The driving device according to claim 6, wherein the elastic member is attached to a surface of the arm portion facing the base member. The drive device according to any one of claims 1 to 7, wherein the enclosure portion is arranged outside the rectangular shape on a projection plane onto the plane from a direction orthogonal to the plane. .. The driving device according to claim 8, wherein the enclosure portion is arranged at a position along the second long side of the rectangular shape. The first actuator has a first coil held by the movable member and a first magnet held by the fixing member so as to face the first coil. By energizing the coil, a driving force is generated in a direction parallel to the other of the first short side and the first long side.
The second actuator has a second coil held by the movable member and a second magnet held by the fixing member so as to face the second coil, and the second actuator has the second coil. By energizing the coil, a driving force is generated in a direction parallel to one of the first short side and the first long side.
The third actuator has a third coil held by the movable member and a third magnet held by the fixing member so as to face the third coil, and the third actuator has the third coil. The driving device according to any one of claims 1 to 9, wherein a driving force parallel to one of the first short side and the first long side is generated by energizing the coil. The fixed part is
With York
It has a plurality of pillar members for fixing the yoke to the fixing member, and has a plurality of pillar members.
The first actuator is arranged between two of the plurality of pillar members, and the second actuator and the third actuator are arranged between two of the plurality of pillar members.
10. The yoke covers the first magnet, the second magnet, and the third magnet on a projection plane onto the plane from a direction orthogonal to the plane. The drive device described in. 11. The aspect of claim 11, wherein the yoke is not arranged on the side of the second short side and the second long side on the projection plane to the plane from a direction orthogonal to the plane. The drive device described. 11. The drive device described in. The movable member comes into contact with the yoke when the movable portion moves in a direction orthogonal to the plane within a range covered by the yoke on a projection plane onto the plane from a direction orthogonal to the plane. The driving device according to any one of claims 11 to 13, wherein the movable member has a fourth regulating unit that regulates the movement of the movable member in a direction orthogonal to the plane. The first actuator is arranged along the first short side.
The driving device according to any one of claims 1 to 14, wherein the second actuator and the third actuator are arranged side by side along the first long side. A driving device including a fixed portion having a magnet and a movable portion having a coil, and moving the movable portion in a plane with respect to the fixed portion by a driving force generated by energization of the coil.
The movable part is
The first metal member and
The second metal member and
A flexible printed circuit board on which the coil is mounted so as to face the magnet.
With a movable member made of a conductive material,
The flexible printed circuit board is characterized in that at least a part of a coverlay covering the ground portion is opened, and the first metal member and the flexible printed circuit board are fastened to the movable member by the second metal member. Drive device. The first metal member is arranged on a surface of the flexible printed substrate opposite to the surface on which the coil is mounted, and at least the coil is projected on the plane from a direction orthogonal to the plane. 16. The driving device according to claim 16, further comprising covering a part of the above. A yoke provided with respect to the movable portion in a direction opposite to that of the magnet and forming a closed magnetic path with the magnet is provided.
The driving device according to claim 16 or 17, wherein the movable range of the second metal member and the yoke do not overlap on a projection plane onto the plane from a direction orthogonal to the plane. The driving device according to claim 18, wherein at least a part of the second metal member and the yoke overlap in a direction orthogonal to the plane. The driving device according to any one of claims 16 to 19, wherein the second metal member is made of a non-magnetic material. The movable portion has a third metal member and a fourth metal member, and has a third metal member.
The driving device according to any one of claims 16 to 20, wherein the third metal member is fastened to the movable member by the fourth metal member. The movable portion includes a third metal member and a fifth metal member.
The driving device according to any one of claims 16 to 20, wherein the first metal member and the third metal member are fastened to the movable member by the fifth metal member. The drive device according to any one of claims 1 to 22 and
An image blur correction device including an image pickup element held by the movable member of the drive device. The drive device according to any one of claims 1 to 22 and
An image blur correction device including a blur correction lens held by a movable member of the drive device. It is an image pickup device
The image blur correction device according to claim 23 or 24,
A detection means for detecting blurring of the image pickup apparatus and
An image pickup apparatus comprising: a control means for driving the image blur correction device so as to cancel the blur of the image pickup apparatus detected by the detection means.

Images