Shake correction device, imaging device, optical device, and drive device

Abstract

One embodiment of the invention provides a shake correction device, an imaging device, an optical device, and a drive device. A shake correction device according to one embodiment of the present invention is provided with: a fixed part; a movable part; and a plurality of balls disposed between the fixed portion and the movable portion, the movable portion being capable of moving in contact with the plurality of balls, in which a first magnet member, a first non-magnetic member, and a first member including a magnetic member are disposed with respect to a first ball, which is at least one of the plurality of balls, and a second non-magnetic member disposed with respect to a second ball, which is at least one of the plurality of balls. A first non-magnetic member and a first magnet member are disposed in this order so as to face the first member with the first ball therebetween.

Description

TECHNICAL FIELD

[0001] The present application relates to a shake correction device, an imaging device, an optical device, and a driving device, and particularly relates to a structure for applying a force of a movable portion to a fixed portion. BACKGROUND

[0002] Regarding the shake correction device, a structure in which a magnet is provided at a ball receiving portion is described in Patent Literature 1. Further, a magnetic circuit composed of a fixed portion, a magnet, a coil, and a top yoke is described in Patent Literature 2.

[0003] Patent Literature 1: Japanese Patent No. 7371131

[0004] Patent Literature 2: Japanese Patent Application Publication No. 2021-140081 SUMMARY

[0005] One embodiment of the technology of the present application provides a shake correction device, an imaging device, an optical device, and a driving device.

[0006] The shake correction device according to the first aspect of the present application includes: a fixed portion; a movable portion; and a plurality of balls disposed between the fixed portion and the movable portion, the movable portion being movable in contact with the plurality of balls, wherein, with respect to at least one ball of the plurality of balls, a first magnet member, a first non-magnetic member, and a first member including a magnetic member are disposed, and the first non-magnetic member and the first magnet member are disposed in this order in opposition to the first member with the at least one ball interposed therebetween.

[0007] The shake correction device according to the second aspect of the present application includes the first non-magnetic member, the first magnet member, and the yoke in this order in the first aspect.

[0008] The shake correction device according to the third aspect of the present application includes the first magnet member in the first or second aspect, the first non-magnetic member between the first magnet member and the at least one ball, and the movable portion including the first member.

[0009] The shake correction device according to the fourth aspect of the present application includes the first magnet member in the first or second aspect, the first non-magnetic member between the first magnet member and the at least one ball, and the fixed portion including the first member.

[0010] The shake correction device according to the fifth aspect of the present application includes the first member including the first magnetic member and a holding member holding the first magnetic member in any one of the first to fourth aspects, and the at least one ball is in contact with the first magnetic member.

[0011] In the fifth embodiment, the jitter correction device of the sixth embodiment has a first non-magnetic component disposed between the first magnetic component and the first ball, a first magnetic component disposed opposite to the first non-magnetic component across the first ball, and a second magnetic component on the side opposite to the first ball relative to the first magnetic component.

[0012] In any of the first to fourth methods, the jitter correction device of the seventh method has a first non-magnetic component disposed between the first magnetic component and the first ball. The first component has: a second non-magnetic component disposed opposite to the first non-magnetic component across the first ball; and a second magnetic component disposed on the side opposite to the first ball relative to the second non-magnetic component.

[0013] In the 7th embodiment, the jitter correction device of the 8th embodiment has a first component having a second magnetic component, which is disposed on the side opposite to the first ball relative to the second non-magnetic component, and the first ball is in contact with the second non-magnetic component.

[0014] The jitter correction device according to the ninth method, in any of the first to eighth methods, has a ball holding part formed in the movable part or the fixed part to hold the first ball.

[0015] The imaging device according to the tenth embodiment includes: a shake correction device according to any one of the first to ninth embodiments; and an imaging element held in a movable part, wherein image shake is corrected by driving the movable part in a plane intersecting the optical axis of the imaging element. In the tenth embodiment, "in a plane intersecting the optical axis of the imaging element" may be in a plane orthogonal to the optical axis of the imaging element, but is not limited to this.

[0016] The imaging device according to the 11th embodiment includes: an imaging element; a shake correction device according to any one of the 1st to 9th embodiments; and a shake correction optical system, which is held in a movable part and corrects image shake by driving the movable part in a plane intersecting the optical axis of the shake correction optical system. In the 11th embodiment, "in a plane intersecting the optical axis of the shake correction optical system" can be a plane orthogonal to the optical axis of the shake correction optical system, but is not limited to this.

[0017] The optical device according to the 12th embodiment includes: a jitter correction device according to any one of the 1st to 9th embodiments; and a jitter correction optical system, which is held in a movable part and corrects image jitter by driving the movable part in a plane intersecting the optical axis of the jitter correction optical system.

[0018] The drive device according to the 13th method includes: a fixed part; a movable part; and a ball, which is disposed between the fixed part and the movable part. The movable part can move by contacting the ball. A first magnetic component, a first non-magnetic component, and a first component including a magnetic body are disposed relative to the ball. The first non-magnetic component and the first magnetic component are disposed sequentially opposite to the first component with the ball in between. Attached Figure Description

[0019] Figure 1 This is a diagram showing the schematic structure of the camera device according to the first embodiment.

[0020] Figure 2 It is a block diagram representing one way of showing the internal structure of a camera device.

[0021] Figure 3 It is a three-dimensional view showing the configuration of the ball bearing surfaces in the vibration correction device.

[0022] Figure 4 This is a cross-sectional view showing a structural example of a magnetic spring.

[0023] Figure 5 This is a diagram showing a structure used to apply force from the movable part to the fixed part.

[0024] Figure 6 This is another cross-sectional view showing a structural example of a magnetic spring.

[0025] Figure 7 This is another sectional view showing a structural example of a magnetic spring.

[0026] Figure 8 This is another sectional view showing a structural example of a magnetic spring.

[0027] Figure 9 This is another sectional view showing a structural example of a magnetic spring.

[0028] Figure 10 This is another sectional view showing a structural example of a magnetic spring.

[0029] Figure 11 This is a diagram illustrating an example of the structure of the ball retainer.

[0030] Figure 12 This is another sectional view showing a structural example of a magnetic spring.

[0031] Figure 13 This is a diagram illustrating an example of magnetic flux flow.

[0032] Figure 14 This is a diagram showing the schematic structure of the camera device according to the second embodiment. Detailed Implementation

[0033] [Force applied to the movable part in the vibration correction device]

[0034] As a countermeasure to prevent image blur caused by camera shake, cameras equipped with in-body image stabilizers (IBIS, also known as BIS) that drive the imaging element for correction are becoming increasingly common. As a component of IBIS, a voice coil motor (VCM) is sometimes used. Known VCM structures include single-sided structures with the magnet positioned on one side (upper or lower in the optical axis direction) and dual-magnet structures where the magnet sandwiches the coil on both the upper and lower sides to increase thrust.

[0035] IBIS consists of a movable part and a fixed part. Therefore, in order to stabilize the imaging surface, it is necessary to apply force to the movable part towards the fixed part (the bayonet surface side). As a method of applying force, most commonly, either a structure that connects the movable part and the fixed part by a helical spring or a structure that places a magnetic body on an FPC (Flexible Printed Circuit) on the upper part of the VCM magnet is adopted.

[0036] The choice between these two structures largely depends on the weight of the movable components or the structure of the VCM. The advantage of placing the magnetic plate on top of the FPC is that "due to the use of magnets within the VCM structure, no additional parts need to be placed in other locations along the VCM projection direction (e.g., the optical axis direction)." However, in a dual-magnet structure where the magnets are close to the FPC, the plate is attracted by the magnets, making this structure unusable. Structures that allow the introduction of magnetic springs even in dual-magnet structures by placing the magnetic plate inside the coil are also known. However, due to the opposite pull from the magnets on both sides, the difference in magnetic force between the top and bottom must be considered, and the plate must be inserted into the inner diameter of the coil. Therefore, the constraints on the size and position of the magnetic plate become considerably stricter compared to the case of a single-sided magnet structure.

[0037] In situations where greater force is required, a structure utilizing a helical spring positioned between the movable and fixed parts is employed. The advantage of this structure is that the force can be determined solely by the helical spring, without relying on a VCM magnet, and its position can be freely configured due to this independence. However, the helical spring requires a spring hook (hooking part), necessitating dedicated space for the helical spring in both the fixed and movable parts. Furthermore, the complex shape of the spring hook limits the materials available for the fixed and movable parts.

[0038] In view of this situation, the inventors of this application conducted in-depth research and obtained the concept of the present invention as described below. Hereinafter, preferred embodiments of the shake correction device, imaging device, optical device, and driving device according to the present invention will be described with reference to the accompanying drawings. Furthermore, in the following drawings, for ease of explanation, some components are sometimes omitted from the display, and / or the color or line type of the components is changed. Also, the drawings do not necessarily accurately represent the shape or size of each component.

[0039] [First Implementation]

[0040] [Structure of the camera device]

[0041] First, let's explain the camera device equipped with a shake correction device. Figure 1 This is a diagram showing the schematic structure of the camera device according to the first embodiment.

[0042] The imaging device 10 (image capture device) is a digital camera, and a lens assembly 300 (optical system) is mounted on the main body 100 of the imaging device. The lens assembly 300 can be integrated with the main body 100 of the imaging device, or it can be detached from the main body 100 of the imaging device. The lens assembly 300 has an aperture 308, lens group 312A and lens group 312B, and has an optical axis L. The lens assembly 300 images the optical image of the subject 1 onto the imaging element 216. The main body 100 of the imaging device has an eyepiece 104, which allows the photographer to visually identify the subject 1 by bringing their eye close to the eyepiece 104.

[0043] In the imaging element 216, an imaging surface 216A (imaging surface, light-receiving surface) is arranged along a plane (XY plane) formed by two directions orthogonal to the optical axis L (Z direction) (X direction and Y direction). The imaging element 216 is held in the movable part of the jitter correction device 200 (jitter correction device, drive device). Furthermore, as detailed later, the jitter correction function is realized by controlling the drive unit 158 ​​included in the jitter correction device 200 through the control unit 140.

[0044] Figure 2 This is a block diagram illustrating one possible internal structure of the camera device 10. The camera device 10 records captured images into a memory card 154, and the overall operation of the device is centrally controlled by a control unit 140 equipped with a processor such as a CPU (Central Processing Unit). Furthermore, power is supplied to all parts of the camera device 10 from a power source not shown.

[0045] The camera device 10 includes an operation unit 138 with a shutter button, a power / mode switch, a mode dial, and a cross-shaped operation button. Signals (commands) from the operation unit 138 are input to the control unit 140. The control unit 140 controls the various circuits of the camera device 10 according to the input signals, including driving control of the imaging element 216, lens driving control, aperture driving control, camera movement control, image processing control, image data recording / playback control, and display control of the image monitor 130.

[0046] The light beam passing through the lens device 300 is imaged onto the CMOS (Complementary Metal-Oxide Semiconductor) type color image sensor, namely the imaging element 216 (imaging element). In addition, the imaging element 216 is not limited to the CMOS type, and other types of image sensors such as CCD (Charge Coupled Device) type or organic imaging elements can also be used.

[0047] Multiple light-receiving elements (e.g., photodiodes) are arranged in two dimensions in the imaging element 216. The image of the subject imaged on the light-receiving surface of each light-receiving element is converted (photoelectric conversion) into a signal voltage (or charge) corresponding to the amount of incident light. This signal is then converted into a digital signal and output via an A / D (Analog / Digital) converter within the imaging element 216.

[0048] When capturing moving or still images, the image signal (image data) read from the imaging element 216 is temporarily stored in the memory 148 (e.g., SDRAM: Synchronous Dynamic Random Access Memory) via the image input controller 122.

[0049] Furthermore, various parameters or tables used in camera control programs, image processing, etc., are stored in flash memory 147. Flash memory 147 is an example of a non-transitory and tangible computer-readable medium.

[0050] Sensor 166 is a camera shake sensor that detects the posture information and posture change information of the imaging device 10. Sensor 166 is, for example, a gyroscope sensor. Sensor 166 is, for example, composed of two gyroscope sensors to detect the amount of hand shake in the longitudinal (+Y, -Y direction) and lateral (+X, -X direction) directions. The detected hand shake amount (angular velocity) is input to the control unit 140. The control unit 140 controls the drive unit 158 ​​to move the imaging element 216 to cancel the movement of the subject image corresponding to the hand shake, thereby performing shake correction. A gyroscope sensor for detecting the amount of hand shake in the rotational direction (e.g., around the Z-axis) can be provided in sensor 166, and shake correction can be performed in a way that cancels hand shake in that rotational direction.

[0051] The drive unit 158 ​​(drive mechanism) is controlled by the control unit 140. The drive unit 158 ​​is composed of a voice coil motor (VCM) and the like, which will be described later.

[0052] The image processing unit 124 reads the unprocessed image data acquired by the image input controller 122 and temporarily stored in the memory 148 during the capture of moving or still images. The image processing unit 124 performs offset processing, pixel interpolation processing (interpolation processing for phase difference detection pixels, defective pixels, etc.), white balance correction, gain control processing including sensitivity correction, gamma correction processing, synchronization processing (also known as "de-mosaic processing"), brightness and chromatic aberration signal generation processing, contour enhancement processing, and color correction on the read image data. The image data processed by the image processing unit 124 and processed as a real-time preview image is input into the VRAM (Video RAM: video random access memory; RAM: random access memory) 150.

[0053] Image data read from VRAM 150 is encoded in video encoder 128 and output to image monitor 130 located on the back of the camera. Thus, a real-time preview image representing the subject is displayed on image monitor 130.

[0054] The image data processed by the image processing unit 124 and the image data (brightness data (Y) and color difference data (Cb, (Cr)) processed as still images or moving images for recording are stored again in the memory 148.

[0055] When recording still or moving images, the compression / expansion processing unit 126 performs compression processing on the luminance data (Y) and chromatic aberration data (Cb) and (Cr) that have been processed by the image processing unit 124 and stored in the memory 148. The compressed image data is then recorded on the memory card 154 via the media controller 152.

[0056] Furthermore, in playback mode, the compression / expansion processing unit 126 performs expansion processing on the compressed image data obtained from the memory card 154 via the media controller 152. The media controller 152 performs tasks such as recording and reading compressed image data from the memory card 154.

[0057] [Structure of the Control Department]

[0058] In the first embodiment, the control unit 140 may be composed of one or more hardware components, and the type of hardware is not limited. For example, the control unit 140 may be composed of programmable logic devices such as CPUs (Central Processing Units), MPUs (Micro Processing Units), FPGAs (Field Programmable Gate Arrays), dedicated circuits for performing specific processes such as ASICs (Application Specific Integrated Circuits), GPUs (Graphics Processing Units), or NPUs (Neural Processing Units). Furthermore, the control unit 140 has units or means that execute various processes in this embodiment. Moreover, different types of hardware can be combined. When multiple hardware components are configured to execute one or more processes of a certain processor, these multiple hardware components may exist in physically separate devices or in the same device. Furthermore, in any embodiment, the order of the processor's processes is not particularly limited and can be appropriately modified. Additionally, the hardware may be composed of circuits composed of semiconductor elements and other circuit elements.

[0059] Furthermore, in this embodiment, the control unit 140 can be implemented using hardware, software, firmware, microcode, or a combination thereof. The software, firmware, and microcode consist of programs. Furthermore, a program can be, for example, a group of program modules, each of whose functions can be implemented by a processor configured to execute those functions. The program can be program code or multiple code segments stored in one or more non-transitory and tangible computer-readable media (e.g., storage media or other storage devices; or flash memory 147 (hereinafter the same)). The program can be divided and stored in multiple non-transitory and tangible computer-readable media existing in physically separate devices. Program code or code segments can represent any combination of sequences, functions, subroutines, routines, subroutines, modules, software packages, classes, commands, data structures, or program statements. Program code or code segments can be connected to other code segments or hardware circuits by sending and receiving information, data, arguments, parameters, or the contents of memory.

[0060] Furthermore, in this embodiment, "non-transitory and tangible computer-readable medium" does not include intangible recording media such as carrier signals or propagation signals themselves. When the control unit 140 processes the program, it can use the memory 148 as a temporary storage area or a working area.

[0061] Furthermore, the control unit 140 or the image processing unit 124 described above can possess various AIs (Artificial Intelligence). Such AIs could be, for example, control for jitter correction or AIs for various image processing tasks. As mentioned above, these AIs can also be implemented through hardware, software, firmware, microcode, or a combination thereof.

[0062] [Overall structure of the jitter correction device]

[0063] As described below, the jitter correction device 200 (jitter correction device, drive device) according to the first embodiment includes: a fixed part; a movable part; and a plurality of balls disposed between the fixed part and the movable part, wherein the movable part is capable of contacting the plurality of balls and moving.

[0064] Figure 3 This is a perspective view (viewed from the +Z direction) showing the configuration of the ball bearing surfaces in the jitter correction device 200. Figure 3 Part (a) shows the state of the area (slanted part) where the imaging element 216 and its holding components are arranged as illustrated. Figure 3 Part (b) indicates a state where the region where the imaging element 216 is configured is omitted. For example... Figure 3As shown, the jitter correction device 200 has three ball bearing surfaces 250. Each ball (one of the "multiple balls," including the first ball) contacts the ball bearing surface 250 and rolls relative to it. The movable part of the imaging element 216 is supported so that it can move within a plane intersecting the optical axis L, and the jitter correction device 200 can correct image jitter by moving the movable part. Furthermore, the "plane intersecting the optical axis L" is preferably a plane perpendicular to the optical axis L (XY plane), but it may not be perfectly perpendicular. Additionally, as detailed later, one side of the first component, including the magnetic component (e.g., a side of a magnetic plate or magnetic base), becomes the ball bearing surface 250.

[0065] Furthermore, the jitter correction device 200 includes a VCM 229. The VCM 229 is a mechanism for driving a movable part in the XY plane (an example of a plane intersecting the optical axis L), and includes a magnet and a coil. For example, the magnet is disposed in the fixed part, and the coil is disposed in the movable part. Additionally, the number and arrangement of the VCM 229 are not limited to... Figure 3 As shown in the diagram.

[0066] [Force applied by the movable part based on a magnetic spring]

[0067] In the jitter correction device 200, a magnetic spring applies force to the fixed part on the ball bearing surface. Hereinafter, an example of the specific structure of this magnetic spring will be described. Furthermore, in the following description, jitter correction devices with different magnetic spring structures (structural examples 1 to 7) are referred to as jitter correction devices 201 to 207, but sometimes these jitter correction devices are collectively referred to as "jitter correction device 200".

[0068] [Example of a jitter correction device structure (1)]

[0069] Figure 4 This is a cross-sectional view showing an example (1) of a jitter correction device. The vertical direction of the figure is the ±Z direction (parallel to the optical axis L). Figure 4 In the jitter correction device 201 (jitter correction device, drive device) shown, a first magnet component 251 (first magnet component), a non-magnetic plate 261A (first non-magnetic component), and a magnetic plate 261B (magnetic component, first magnetic component, first component) are arranged relative to the ball 227 (ball, first ball). On one side of the ball 227 (in... Figure 4 A magnetic plate 261B is arranged on the lower side (in the middle), and is positioned opposite the magnetic plate 261B through the ball 227 (in the middle). Figure 4 The non-magnetic plate 261A (first non-magnetic component) and the first magnet component 251 (first magnet component) are arranged sequentially on the upper side (center). Furthermore, the jitter correction device 201 sequentially ( Figure 4The first non-magnetic component (from bottom to top) has a non-magnetic plate 261A, a first magnet component 251, and a first yoke 231A (magnetic yoke).

[0070] The magnetic plate 261B (first magnetic component, first part) is held by the holding member 241B (holding member). Furthermore, the holding member 241A and the first magnetic yoke 231A hold the first magnet component 251, and the second magnetic yoke 231B holds the non-magnetic plate 261A.

[0071] Ball bearing 227 (first ball bearing) and magnetic plate 261B (first magnetic component) Figure 4 The upper surface (+Z side or -Z side) of the ball can be used as the ball bearing surface. The ball 227 also contacts the non-magnetic plate 261A. Figure 4 The surface of the lower side (-Z side or +Z side) is in contact.

[0072] [Structure of the magnetic spring in the ball bearing retainer]

[0073] In recent years, digital cameras have used larger imaging elements, which has increased the force required to drive the imaging elements used for image correction. Therefore, a dual-magnet structure is sometimes used in VCMs, but as mentioned above, if the coil position is close to the magnet position, it can sometimes cause the plate to be attracted by the magnet.

[0074] On the other hand, IBIS uses ball bearings to hold the imaging element in three locations for movement. By smoothly rolling these balls, the imaging surface can follow any jitter, thus correcting for it. If the balls are present between and in contact with the plates, then even if a force is applied and the imaging surface is tilted, the plates opposite the balls will not come into contact with each other.

[0075] Therefore, if the magnet is arranged in the ball holding position as in the present invention, and a magnetic component is arranged on one side of the ball (the first ball), the magnetic component is arranged in the ball holding position. Figure 4 In the example, magnetic plate 261B), a non-magnetic component is arranged on the other side (in... Figure 4 In the example of a non-magnetic plate 261A, a structure that applies magnetic force will not cause the plate to be attracted by a magnet, and even considering planar space, since it is the ball bearing part (ball bearing part) required for movement, no other space is needed as when using a helical spring.

[0076] The rolling surface in contact with the ball 227 needs to meet certain standards regarding hardness, flatness, and surface roughness, which are difficult to achieve using a magnetic surface (in...). Figure 4 In the example, the surface of the first magnet component 251 is replaced. Furthermore, if the area near the first magnet component 251 (in...) Figure 4In the example, a plate with strong magnetism is placed directly below the first magnet component 251. The magnetic flux will rotate within the plate, so it cannot attract the opposite side (the side of magnetic plate 261B; the part where the force was originally intended to be applied) separated by the ball 227.

[0077] Therefore, the magnet surface of the first magnet component 251 is not directly used as the rolling surface, but rather... Figure 4 In the example, the non-magnetic plate 261A is set as the rolling surface, thereby satisfying the requirements for the rolling surface and suppressing the influence on the magnetic flux. Furthermore, to suppress the influence on the magnetic flux, the rolling surface on the first magnet component 251 side is preferably a non-magnetic component like the non-magnetic plate 261A, but it does not have to be a completely non-magnetic component. However, in order to construct a magnetic spring, the rolling surface on the first magnet component 251 side ( Figure 4 The upper side; non-magnetic plate 261A) is set as the magnetic ratio of the rolling surface on the opposite side of the ball 227 (in Figure 4 In the example, it is magnetic plate 261B; Figure 4 (The lower side) is weak.

[0078] And, as Figure 4 As shown, on one side of ball 227 (in) Figure 4 The middle is the upper side; in the +Z direction or -Z direction), and it has a non-magnetic plate 261A, a first magnet component 251 and a first magnetic yoke 231A in sequence. Figure 4 (From bottom to top). This structure allows magnetic force (magnetic flux) to be guided along the direction of the balls 227.

[0079] In addition, the first magnetic yoke 231A and the second magnetic yoke 231B can be made of magnetic material, thereby improving the effect of guiding magnetic force and making magnetic flux flow (rotation) along the direction of the ball 227 (the same applies to the jitter correction device described below in another manner).

[0080] In the jitter correction device 200 (jitter correction device, drive device) according to the first embodiment, at least one of the three ball bearing surfaces 250 has as follows: Figure 4 That kind of structure is acceptable, and it can also include, for example... Figure 4 The structure shown is similar to that of a conventional ball retainer. Preferably, all three ball bearing surfaces 250 of the jitter correction device 200 have the following characteristics: Figure 4 That kind of structure.

[0081] In addition, sometimes it will be like Figure 4 The ball used in the structure of the present invention is referred to as "the first ball". The same applies in another structural example of the jitter correction device of the present invention described below.

[0082] Furthermore, in the structures (jitter correction device, drive device) involved in this invention, the arrangement direction of the magnet components (which direction is set as the N pole and which direction is set as the S pole) is not limited to the illustrated example and can be appropriately changed. The same applies in the following structural examples. However, in the case of a structure using multiple magnet components, the arrangement direction in which these multiple magnet components appropriately form a magnetic circuit is used.

[0083] [Force applied to the movable part in the vibration correction device]

[0084] exist Figure 4 In the example, either the upper or lower part of the jitter correction device 201 can be a movable part or a fixed part. For convenience, the ball bearing 227 and the components located above it (the second magnetic yoke 231B, the non-magnetic plate 261A, the first magnet component 251, the first magnetic yoke 231A, and the holding component 241A) will be referred to as "upper structure 201A" in the following description, and the components located below the ball bearing 227 (the magnetic plate 261B and the holding component 241B) will be referred to as "lower structure 201B" for convenience. Furthermore, the upper structure 201A can be located on the +Z side (the subject side), or the lower structure 201B can be located on the +Z side.

[0085] Figure 4 This diagram shows the structure in the vibration correction device 201 used to apply force from the movable part to the fixed part. Figure 4 Part (a) indicates that the upper structure 201A is in the state of being a movable part. Figure 4 Part (b) indicates that the lower structure 201B is in the state of being movable.

[0086] exist Figure 4 In the example shown in part (a), the upper fixing part 220A (fixing part) and the lower fixing part 220B (fixing part) are combined by a fixing member 220C to form the fixing part 220. That is, in this example, the movable part 224 has a first magnet member 251, and the fixing part 220 has a magnetic plate 261B (first member). The fixing member 220C can be, for example, composed of a shaft member for separating the upper fixing part 220A and the lower fixing part 220B in the ±Z direction and a screw for fixing the shaft member.

[0087] In this example, the movable part 224 includes the aforementioned upper structure 201A and imaging element 216. The imaging element 216 is fixed to the upper structure 201A by a retaining member 241A and / or other members (not shown). Furthermore, the movable part 224 applies force to the lower fixing part 220B by the magnetic spring of the aforementioned structure, and is driven by the aforementioned VCM 229 in the XY plane (in the plane intersecting (orthogonal) to the optical axis L), thereby correcting image jitter.

[0088] On the other hand, Figure 4 In the example shown in part (b), the upper fixing part 222A (fixing part) and the lower fixing part 222B (fixing part) are combined by a fixing member 222C to form the fixing part 222. That is, in this example, the fixing part 222 has a first magnet member 251, and the movable part 226 has a magnetic plate 261B (first member). Similar to the fixing member 220C described above, the fixing member 222C can, for example, be composed of a shaft member for separating the upper fixing part 222A and the lower fixing part 222B in the ±Z direction and a screw for fixing the shaft member.

[0089] In this example, the movable part 226 includes the lower structure 201B and the imaging element 216 described above. The imaging element 216 is fixed to the lower structure 201B by the retaining member 241B and / or other members (not shown). Furthermore, the movable part 226 applies force to the lower fixing part 222B by the magnetic spring of the above structure, and is driven in the XY plane (in the plane intersecting the optical axis L) by the VCM 229 described above, thereby correcting image jitter.

[0090] about Figure 5 The structure described above, in which "either the upper or lower part of the shake correction device 200 can be a movable part or a fixed part," can also be applied to other examples described below. In addition, in any case, the components of the shake correction device 201 have a shape and size that do not prevent the subject light from incident on the imaging surface 216A (for example, the shape and size of a partial opening of the imaging surface 216A in the ±Z direction).

[0091] [Example of the structure of a jitter correction device (2)]

[0092] Figure 5 This is a cross-sectional view showing the structure of the jitter correction device 202 (jitter correction device 200; jitter correction device, drive device). The vertical direction of the figure is the ±Z direction (the direction parallel to the optical axis L). Figure 5 In the jitter correction device 202 shown, a first magnet component 252 (first magnet component), a non-magnetic plate 262A (first non-magnetic component), and a magnetic plate 262B (first magnetic component, first component) are arranged relative to the ball 227 (ball, first ball). On one side of the ball 227 (in... Figure 5 A magnetic plate 262B is arranged on the lower side (in the middle), and is positioned opposite the magnetic plate 262B through the ball 227 (in the middle). Figure 5 The non-magnetic plate 262A (first non-magnetic component) and the first magnet component 252 (first magnet component) are arranged sequentially on the upper side (center). Furthermore, the jitter correction device 202 sequentially ( Figure 5The first non-magnetic component (from bottom to top) has a non-magnetic plate 262A, a first magnet component 252, and a first yoke 232A (magnetic yoke).

[0093] The magnetic plate 262B is held by the holding member 242B. Furthermore, the first magnetic yoke 232A holds the first magnet member 252, and the second magnetic yoke 232B holds the non-magnetic plate 262A.

[0094] Magnetic plate 262B Figure 6 The upper surface (+Z side or -Z side) of the ball bearing surface becomes the ball bearing surface, and the ball 227 contacts it. The ball 227 also contacts the non-magnetic plate 262A. Figure 6 The surface of the lower side (-Z side or +Z side) is in contact.

[0095] Similar to the jitter correction device 201 described in structural example (1), the jitter correction device 202 also prevents the plate from being attracted by the magnet and does not require additional space as is required when using a helical spring. Furthermore, by providing a non-magnetic plate 262A as the rolling surface, the requirements for the rolling surface can be met, and the influence on the magnetic flux can be suppressed.

[0096] Furthermore, in the jitter correction device 202, in the XY plane direction ( Figure 6 In the horizontal direction, the size of the first magnet component 252 is larger than that of the second yoke 232B, and it functions as a flange. As a result, the shape of the second yoke 232B becomes simpler, the ease of processing is improved, and the portion of magnetic flux leakage is reduced.

[0097] In addition, similar to the above description of the vibration correction device 201, in the vibration correction device 202, either the upper structure or the lower structure can be a movable part or a fixed part.

[0098] [Example of the structure of a jitter correction device (3)]

[0099] Figure 6 This is a cross-sectional view showing the structure of the jitter correction device 203 (jitter correction device 200; jitter correction device, drive device). The vertical direction of the figure is the ±Z direction (the direction parallel to the optical axis L). Figure 6 In the jitter correction device 203 shown, a first magnet component 253 (first magnet component), a non-magnetic plate 263A (first non-magnetic component), and a magnetic plate 263B (first magnetic component, first component) are arranged relative to the ball 227 (ball, first ball). On one side of the ball 227 (in... Figure 6 A magnetic plate 263B is arranged on the lower side (in the middle), and is positioned opposite the magnetic plate 263B through the ball 227 (in the middle). Figure 6The non-magnetic plate 263A (first non-magnetic component) and the first magnet component 253 (first magnet component) are arranged sequentially on the upper side (center). Furthermore, the jitter correction device 203 sequentially ( Figure 6 The first non-magnetic component (from bottom to top) has a non-magnetic plate 263A, a first magnet component 253, and a first yoke 233A (yoke).

[0100] The magnetic plate 263B is held by the holding member 243B. Furthermore, the first yoke 233A holds the first magnet member 253, and the second yoke 233B holds the non-magnetic plate 263A. The holding member 243A holds the first yoke 233A, the first magnet member 253, and the second yoke 233B.

[0101] Magnetic plate 263B Figure 7 The upper surface (+Z side or -Z side) of the ball becomes the ball bearing surface, and the ball 227 (the first ball) contacts it. The ball 227 also contacts the non-magnetic plate 263A. Figure 7 The surface of the lower side (-Z side or +Z side) is in contact.

[0102] Similar to the jitter correction device described above in structural examples (1) and (2), the jitter correction device 203 does not cause the plate to be attracted by the magnet, and it does not require additional space as is required when using a helical spring. Furthermore, by providing a non-magnetic plate 263A as the rolling surface, the requirements for the rolling surface can be met, and the influence on the magnetic flux can be suppressed.

[0103] In addition, similar to the above description of the vibration correction devices 201 and 202, in the vibration correction device 203, either the upper structure or the lower structure can be a movable part or a fixed part.

[0104] [Example of the structure of a jitter correction device (4)]

[0105] Figure 7 This is a cross-sectional view showing the structure of the jitter correction device 204 (jitter correction device 200; jitter correction device, drive device). The vertical direction of the figure is the ±Z direction (the direction parallel to the optical axis L). Figure 7 In the jitter correction device 204 shown, a first magnet component 254 (first magnet component), a non-magnetic plate 264A (first non-magnetic component), and a magnetic plate 264B (first magnetic component, first component) are arranged relative to the ball 227 (ball, first ball). On one side of the ball 227 (in... Figure 7 A magnetic plate 264B is arranged on the lower side (in the middle), and a magnetic component 274C (second magnetic component, first component) is arranged on the side opposite to the ball 227, separated by the magnetic plate 264B.

[0106] On the other hand, the ball bearing 227 is positioned opposite the magnetic plate 264B (in) Figure 7 The non-magnetic plate 264A (first non-magnetic component) and the first magnet component 254 (first magnet component) are arranged sequentially on the upper side (center). Furthermore, the jitter correction device 204 sequentially ( Figure 7 From bottom to top, it has a non-magnetic plate 264A (first non-magnetic component), a first magnet component 254 (first magnet component) and a first yoke 234A (magnetic yoke).

[0107] Furthermore, the magnetic plate 264B and the magnetic component 274C are held by the holding component 244B. The first yoke 234A holds the first magnet component 254, and the second yoke 234B holds the non-magnetic plate 264A. The holding component 244A holds the first yoke 234A, the first magnet component 254, and the second yoke 234B.

[0108] Magnetic plate 264B Figure 8 The upper surface (+Z side or -Z side) of the ball becomes the ball bearing surface, and ball 227 (first ball) contacts it. Ball 227 also contacts the non-magnetic plate 264A. Figure 8 The surface of the lower side (-Z side or +Z side) is in contact.

[0109] Similar to the jitter correction device described in structural examples (1) to (3), the jitter correction device 204 does not cause the plate to be attracted by the magnet, and it does not require additional space as is required when using a helical spring. Furthermore, by providing a non-magnetic plate 264A as the rolling surface, the requirements for the rolling surface can be met, and the influence on the magnetic flux can be suppressed.

[0110] Furthermore, since the magnetic component 274C does not directly contact the ball 227, it is not constrained by limitations on the ball bearing surface (such as the required size calculated based on surface roughness or flatness, mobility, etc.), thus increasing the design freedom. Moreover, by using the magnetic plate 264B and the magnetic component 274C, the force can be enhanced.

[0111] Furthermore, since the vibration correction device 204 includes a magnetic component 274C, a non-magnetic or weakly magnetic plate can be used instead of the magnetic plate 264B. Also, similar to the description of vibration correction devices 201-203, in the vibration correction device 204, either the upper structure or the lower structure can be a movable or fixed part.

[0112] [Example of the structure of a jitter correction device (5)]

[0113] Figure 8This is a cross-sectional view showing the structure of the jitter correction device 205 (jitter correction device 200; jitter correction device, drive device). The vertical direction of the figure is the ±Z direction (the direction parallel to the optical axis L). Figure 8 The jitter correction device 205 shown includes a first magnet component 255A (first magnet component), a non-magnetic plate 265A (first non-magnetic component), and a non-magnetic plate 265B (first component, second non-magnetic component) arranged relative to the ball 227 (ball, first ball).

[0114] On one side of ball 227 (in) Figure 8 A non-magnetic plate 265B is arranged on the lower side (in the middle), and on the side opposite to the ball 227, separated by the non-magnetic plate 265B (in Figure 8 The lower part of the device is equipped with a second magnet component 255B (the first component and the second magnet component) and a third yoke 235C. Because the jitter correction device 205 has the second magnet component 255B, the force can be ensured even if a non-magnetic plate 265B is provided on the ball rolling surface.

[0115] On the other hand, it is positioned opposite the non-magnetic plate 265B through the ball bearing 227 (in) Figure 8 The non-magnetic plate 265A (first non-magnetic component) and the first magnetic component 255A (first magnetic component) are arranged sequentially on the upper side (center). Furthermore, the jitter correction device 205 sequentially ( Figure 9 The device (from bottom to top) includes a non-magnetic plate 265A (first non-magnetic component), a first magnet component 255A (first magnet component), and a first yoke 235A (magnetic yoke). Furthermore, the jitter correction device 205 includes: a holding member 245A for holding the first magnet component 255A, etc.; and a holding member 245B for holding the non-magnetic plate 265B, the second magnet component 255B, and the third yoke 235C.

[0116] According to the jitter correction device 205 with the above structure, due to the jitter on both sides of the ball 227 ( Figure 9 Magnets are arranged on the upper and lower sides (±Z direction), thus further enhancing the force. Furthermore, only two magnets are needed to ensure the required force, thus reducing the size of the first magnet component 255A held by the holding component 245A.

[0117] [Structural Example of a Jitter Correction Device (6)]

[0118] Figure 9 This is a cross-sectional view showing the structure of the jitter correction device 206 (jitter correction device 200; jitter correction device, drive device). The vertical direction of the figure is the ±Z direction (the direction parallel to the optical axis L). Figure 9The jitter correction device 206 shown includes a first magnet component 256A (first magnet component), a non-magnetic plate 266A (first non-magnetic component), and a non-magnetic plate 266B (first component, second non-magnetic component) arranged relative to the ball 227 (ball, first ball).

[0119] On one side of ball 227 (in) Figure 9 A non-magnetic plate 266B is arranged on the lower side (in the middle), and on the side opposite to the ball 227, separated by the non-magnetic plate 266B (in Figure 9 The lower side (in the middle) is equipped with a second magnet component 256B (the first component and the second magnet component) and a second yoke 236B. Because the jitter correction device 206 has the second magnet component 256B, even if a non-magnetic plate 266B is arranged on the ball rolling surface (in... Figure 9 The lower side of the ball bearing 227 (in the middle) can also ensure the force.

[0120] On the other hand, it is positioned opposite the non-magnetic plate 266B through the ball bearing 227 (in) Figure 10 The non-magnetic plate 266A (first non-magnetic component) and the first magnetic component 256A (first magnetic component) are arranged sequentially on the upper side (center). Furthermore, the jitter correction device 206 sequentially ( Figure 10 The device (from bottom to top) includes a non-magnetic plate 266A (first non-magnetic component), a first magnet component 256A (first magnet component), and a first yoke 236A (magnetic yoke). Furthermore, the jitter correction device 206 includes: a holding member 246A for holding the first magnet component 256A, etc.; and a holding member 246B for holding the non-magnetic plate 266B, the second magnet component 256B, and the second yoke 236B.

[0121] like Figure 10 and Figure 10 As shown, the retaining member 246A has a concave ball retaining portion 246C (ball retaining portion) for retaining the ball 227 (first ball). Figure 10 This is a perspective view of the ball retainer 246C (from...) Figure 10 (Viewed from below), the ball retaining portion 246C surrounds the ball 227 to prevent it from falling out. As described above, in the jitter correction device 200 according to the first embodiment, either the upper structure or the lower structure can be a movable part or a fixed part, and the ball retaining portion 246C can be provided on either the movable part or the fixed part.

[0122] According to the jitter correction device 206 with the above structure, since the magnets are arranged on both sides separated by the ball 227 ( Figure 10The upper and lower sides (±Z direction) of the magnet can be used to further enhance the force. Furthermore, since only two magnets are needed to ensure the required force, the first magnet component 256A held by the holding component 246A can be reduced in size. Also, since there is no yoke at the lower part of the first magnet component 256A, this part can be miniaturized.

[0123] [Structural Example of a Jitter Correction Device (Example 7)]

[0124] Figure 10 This is a cross-sectional view showing the structure of the jitter correction device 207 (jitter correction device 200; jitter correction device, drive device). The vertical direction of the figure is the ±Z direction (the direction parallel to the optical axis L). Figure 11 The jitter correction device 207 shown includes a first magnet component 257 (first magnet component), a non-magnetic plate 267A (first non-magnetic component) and a magnetic base 248 arranged relative to the ball 227 (ball, first ball).

[0125] In the jitter correction device 207, apart from the magnetic base 248, the jitter correction device 201 described above (see reference 201) can be used. Figure 11 It has the same structure as the first magnetic yoke 237A, the second magnetic yoke 237B and the retaining member 247A.

[0126] In the jitter correction device 207, the retaining member and the plate disposed below the ball 227 in other structural examples are made of the same material as the magnetic base 248. The magnetism of the magnetic base 248 is set to be stronger than that of the non-magnetic plate 267A.

[0127] A portion of the magnetic base 248 ( Figure 10 The area protruding upwards becomes the ball bearing surface (rolling surface) of the ball 227. The ball bearing surface can be integrally formed with other parts of the magnetic base 248, for example, by stamping the component constituting the magnetic base 248. The stamping process is, for example, a semi-punch (a process that does not completely penetrate the component, causing it to protrude about half its height; sometimes also called semi-cutting, semi-penetration, stamping, embedding, etc.), but the height of the protrusion is not limited to half the thickness of the component. Furthermore, the ball bearing surface is preferably a surface formed by machining the protrusion formed by the semi-punch. As a machining process, for example, grinding can be performed to improve flatness.

[0128] Furthermore, a plate-shaped part made of the same material as the magnetic base 248 can be fixed to the magnetic base 248 (holding component) by means of laser welding, thereby forming a ball bearing surface.

[0129] According to the jitter correction device 207 with the above structure, in addition to the same effects as other structural examples, it can perform the necessary functions regarding the ball bearing surface, and is formed by the same component instead of forming the retaining component and the plate separately. Furthermore, the magnetic tension also depends on the thickness of the component, so by increasing the thickness of the ball bearing surface portion (the protrusion of the magnetic base 248), the force can be increased.

[0130] [The flow of magnetic flux in the jitter correction device]

[0131] The state of magnetic flux flow in the jitter correction device 200 with the above structure is shown in... Figure 10 . Figure 12 Parts (a) to (d) respectively represent the state of magnetic flux flow in the jitter correction devices 201 to 204 involved in structural examples (1) to (4). Figure 12 As shown, in the jitter correction device 200, a first magnetic component (first magnetic component 251, etc.), a first non-magnetic component (non-magnetic plate 261A, etc.), and a first component including a magnetic component (magnetic plate 261B, etc.) are arranged opposite to the ball 227 (first ball). The first non-magnetic component and the first magnetic component are arranged sequentially opposite to the first component, thereby forming a magnetic circuit based on the first magnetic component.

[0132] [Second Implementation]

[0133] In the first embodiment described above, the method of correcting image jitter by providing a jitter correction device or a drive device inside the camera device body 100 to drive the movable part including the imaging element 216 was explained. However, in this invention, image jitter can also be corrected by driving a jitter correction optical system held in the movable part. Hereinafter, this second embodiment will be described.

[0134] Figure 4 This is a diagram showing a schematic structure of the camera device 20 according to the second embodiment. Hereinafter, the same reference numerals are used to denote the same structures as in the first embodiment, and detailed descriptions are omitted.

[0135] The imaging device 20 is a digital camera, and a lens assembly 302 (optical system, optical device) is mounted on the imaging device body 100A. The lens assembly 302 may be integrated with the imaging device body 100A, or it may be detachable from the imaging device body 100A. The lens assembly 302 includes lens groups 312A and 312B, and has an optical axis L. The lens assembly 302 images the optical image of the subject 1 onto the imaging element 216. The imaging device body 100A has an eyepiece 104, allowing the photographer to visually identify the subject 1 by bringing their eye close to the eyepiece 104. Similar to the first embodiment, the imaging device 20 may also have an aperture 308.

[0136] The camera device 20 includes a shake correction device 310 (shake correction device) and a shake correction optical system 322 (shake correction optical system). The shake correction device 310 can adopt the same structure as the shake correction device 200 according to the first embodiment, and has a fixed part 332 including a front fixed part 332A and a rear fixed part 332B, a movable part 320, and a ball (at least one first ball) not shown. Similar to the above description regarding the first embodiment (see reference...) Figure 12 Figure 13 Figure 13 Figure 13 Figure 14 Figure 5 The front fixing part 332A and the rear fixing part 332B can be fixed by a shaft or screw.

[0137] The jitter correction optical system 322 can be constructed using one or more lenses and is held in the movable part of the jitter correction device 310. The control unit 140A controls the drive unit 340 to drive the movable part 320, including the jitter correction optical system 322, in a plane intersecting the optical axis of the jitter correction optical system 322, thereby correcting image jitter. "In a plane intersecting the optical axis of the jitter correction optical system" can be a plane orthogonal to the optical axis L, but is not limited to this.

[0138] Similar to the jitter correction device 200 according to the first embodiment, the drive unit 340 can be configured using a VCM.

[0139] The jitter correction device 310 with the above-described structure, like the jitter correction device 200 of the first embodiment, does not cause the plate to be attracted by the magnet, and does not require additional space as when using a helical spring. Moreover, by providing a non-magnetic plate or the like as the rolling surface, the requirements for the rolling surface can be met, and the influence on the magnetic flux can be suppressed.

[0140] In addition, similar to the above description of the jitter correction device 200, in the jitter correction device 310, either the structure on the +Z side (e.g., the holding member, the first magnetic yoke, the first magnet member, the non-magnetic plate, the second magnetic yoke, and the first ball) or the structure on the -Z side (e.g., the magnetic plate and the holding member) can be a movable part or a fixed part.

[0141] Furthermore, the shake correction device involved in the first method and the shake correction device involved in the second method can be installed in a single camera device.

[0142] The embodiments of the present invention have been described above, but the present invention is not limited to the above-described manner and can be modified in various ways.

[0143] Symbol Explanation

[0144] 1-Subject, 10-Camera device, 20-Camera device, 100-Camera device body, 100A-Camera device body, 104-Eyepiece, 122-Image input controller, 124-Image processing unit, 126-Compression / expansion processing unit, 128-Video encoder, 130-Image monitor, 138-Operation unit, 140-Control unit, 140A-Control unit, 147-Flash memory, 148-Memory, 152-Media controller, 154-Memory card, 158-Drive unit, 166-Sensor, 200-Shake correction device, 201-Shake correction device, 201A-Upper structure, 201B-Lower structure, 202-Shake correction device, 203-Shake correction device, 204 - Shake correction device, 205- Shake correction device, 206- Shake correction device, 207- Shake correction device, 216- Imaging element, 216A- Imaging surface, 220- Fixing part, 220A- Upper fixing part, 220B- Lower fixing part, 220C- Fixing component, 222- Fixing part, 222A- Upper fixing part, 222B- Lower fixing part, 222C- Fixing component, 224- Movable part, 226- Movable part, 227- Ball bearing, 231A- First yoke, 231B- Second yoke, 232A- First yoke, 232B- Second yoke, 233A- First yoke, 233B- Second yoke, 234A- First yoke, 234B- Second yoke, 235A- First yoke Yoke, 235B - Second Magnetic Yoke, 235C - Third Magnetic Yoke, 236A - First Magnetic Yoke, 236B - Second Magnetic Yoke, 237A - First Magnetic Yoke, 237B - Second Magnetic Yoke, 241A - Retaining Member, 241B - Retaining Member, 242A - Retaining Member, 242B - Retaining Member, 243A - Retaining Member, 243B - Retaining Member, 244A - Retaining Member, 244B - Retaining Member, 245A - Retaining Member, 245B - Retaining Member, 246A - Retaining Member, 246B - Retaining Member, 246C - Ball Retaining Part, 247A - Retaining Member, 248 - Magnetic Base, 250 - Ball Bearing Surface, 251 - First Magnet Component, 252 - First Magnet Component, 253 - ... 1. Magnet component; 254 - First magnet component; 255A - First magnet component; 255B - Second magnet component; 256A - First magnet component; 256B - Second magnet component; 257 - First magnet component; 261A - Non-magnetic plate; 261B - Magnetic plate; 262A - Non-magnetic plate; 262B - Magnetic plate; 263A - Non-magnetic plate; 263B - Magnetic plate; 264A - Non-magnetic plate; 264B - Magnetic plate; 265A - Non-magnetic plate; 265B - Non-magnetic plate; 266A - Non-magnetic plate; 266B - Non-magnetic plate; 267A - Non-magnetic plate; 274C - Magnetic component; 300 - Lens assembly; 302 - Lens assembly; 310 - Vibration correction device; 312A - Lens group.312B - Lens group; 320 - Movable part; 322 - Shake correction optical system; 332 - Fixed part; 332A - Front fixed part; 332B - Rear fixed part; 340 - Drive part.

Claims

1. A shake correction device comprising: a fixed portion; a movable portion; and a plurality of balls disposed between the fixed portion and the movable portion, the movable portion being movable in contact with the plurality of balls, wherein a first magnet portion, a first non-magnetic portion, and a first portion including a magnetic portion are disposed with respect to at least one ball of the plurality of balls, which is a first ball, the first non-magnetic portion and the first magnet portion are disposed in this order in opposition to each other with the first ball interposed therebetween.

2. The shake correction device according to claim 1, wherein the first non-magnetic portion, the first magnet portion, and a yoke are provided in this order.

3. The shake correction device according to claim 1 or 2, wherein the fixed portion has the first magnet portion, the first non-magnetic portion is provided between the first magnet portion and the first ball, and the movable portion has the first portion.

4. The shake correction device according to claim 1 or 2, wherein the movable portion has the first magnet portion, the first non-magnetic portion is provided between the first magnet portion and the first ball, and the fixed portion has the first portion.

5. The shake correction device according to claim 1 or 2, wherein the first portion includes a first magnetic portion and a holding portion that holds the first magnetic portion, the first ball is in contact with the first magnetic portion.

6. The shake correction device according to claim 5, wherein the first non-magnetic portion is provided between the first magnet portion and the first ball, the first magnetic portion is provided in opposition to the first non-magnetic portion with the first ball interposed therebetween, and a second magnetic portion is provided on a side opposite to the first ball with respect to the first magnetic portion.

7. The shake correction device according to claim 1 or 2, wherein the first non-magnetic portion is provided between the first magnet portion and the first ball, the first portion has a second non-magnetic portion provided in opposition to the first non-magnetic portion with the first ball interposed therebetween, and a second magnetic portion provided on a side opposite to the first ball with respect to the second non-magnetic portion.

8. The shake correction device according to claim 7, wherein the first portion has a second magnet portion, the second magnet portion is provided on a side opposite to the first ball with respect to the second non-magnetic portion, the first ball is in contact with the second non-magnetic portion.

9. The shake correction device according to claim 1 or 2, wherein a ball holding portion that holds the first ball is formed in the movable portion or the fixed portion.

10. An image pickup device comprising: the shake correction device according to any one of claims 1 to 9; and an imaging element held by the movable portion, image shake is corrected by driving the movable portion in a plane intersecting an optical axis of the imaging element.

11. An image pickup device comprising: an imaging element; the shake correction device according to any one of claims 1 to 9; and a shake correction optical system held by the movable portion, The image blur is corrected by driving the movable section in a plane intersecting the optical axis of the blur correction optical system.

12. An optical device comprising: the blur correction device according to any one of claims 1 to 9; and a blur correction optical system held by the movable section, The image blur is corrected by driving the movable section in a plane intersecting the optical axis of the blur correction optical system.

13. A driving device comprising: a fixed section; a movable section; and a ball disposed between the fixed section and the movable section, The movable section is movable in contact with the ball, A first magnet section, a first non-magnetic section, and a first section including a magnetic body are disposed with respect to the ball, The first non-magnetic section and the first magnet section are disposed in this order opposite the first section across the ball.

Images