JP2022013078A - Blur correction device, lens apparatus and imaging apparatus having the same - Google Patents

Abstract

To provide a blur correction device which can excellently correct image blur while being small in the size, and a lens apparatus and an imaging apparatus having the same.SOLUTION: A blur correction device 400 comprises: a stationary frame 403; a movable frame 401 which holds a lens 402 and is movable in a direction including a component of a direction vertical to an optical axis O; and a drive unit for moving the movable frame 401. The movable frame 401 includes first contact parts 401c, 401d which face the stationary frame 403 in the direction vertical to the optic axis O. The stationary frame 403 comprises: second contact parts 403c, 403g which restrict the movement of the movable frame 401 by being in contact with the first contact part 401c; and a notch part 403d which is not in contact with the first contact part 401d when the movable frame 401 moves. The drive unit includes first magnets 407a, 409a arranged at the position of the notch part. The magnets 407a, 409a have third contact parts 407c, 409c which restrict the movement of the movable frame 401 by being in contact with the first contact part 401d.SELECTED DRAWING: Figure 4

Description

The present invention relates to a shake correction device, and is suitable for a lens device used in an image pickup device such as a digital still camera or a digital video camera.

Conventionally, a lens device and an image pickup device provided with a shake correction device for suppressing (correcting) image shake caused by a user's camera shake or the like are known. Patent Document 1 describes a shake correction device that employs an electromagnetic actuator including a magnet and a coil as a drive unit for moving a lens for image shake correction in a direction perpendicular to the optical axis.

Japanese Unexamined Patent Publication No. 2016-157040

In recent years, it has been required that a shake correction device can satisfactorily correct image shake even though it is small in size. In order to obtain good correction performance, it is necessary to secure a sufficient amount of movement (stroke) of the lens, but in general, as the amount of movement of the lens increases, the size of the drive unit also increases. It ends up. Since Patent Document 1 does not consider the arrangement of the drive unit when the runout correction device is miniaturized, the entire device may become large when the size of the drive unit is increased.

An object of the present invention is to provide a shake correction device capable of satisfactorily correcting image shake while being small in size, a lens device provided with the shake correction device, and an image pickup device.

The shake correction device as one aspect of the present invention for achieving the above object includes a fixed frame, a movable frame that holds a lens and can move in a direction including a component in a direction perpendicular to the optical axis, and the movable frame. The movable frame includes a drive unit for moving the frame, the movable frame has a first contact portion facing the fixed frame in a direction perpendicular to the optical axis, and the fixed frame has the first contact portion. The drive portion has a second contact portion that restricts the movement of the movable frame by abutting on the movable frame, and a notch portion that does not abut on the first contact portion when the movable frame moves. The first magnet includes a first magnet arranged at a position of the portion, and the first magnet has a third contact portion that limits the movement of the movable frame by abutting on the first contact portion. ..

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a shake correction device capable of satisfactorily correcting image shake while being small in size, a lens device provided with the shake correction device, and an image pickup device.

The block diagram which shows the main part of the image pickup system which concerns on Example 1 of this invention. An exploded perspective view of the runout correction device according to the first embodiment. The front view of the movable unit in the runout correction device which concerns on Example 1. FIG. The front view which shows the positional relationship of each member constituting the runout correction apparatus which concerns on Example 1. FIG. FIG. 3 is a cross-sectional view on the optical axis of the runout correction device according to the first embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. For convenience, each drawing may be drawn at a scale different from the actual one. Further, in each drawing, the same reference number is assigned to the same member, and duplicate description is omitted.

[Example 1]
FIG. 1 is a block diagram showing a configuration of a main part of an imaging system (camera system) 100 according to a first embodiment of the present invention. The image pickup system 100 includes a lens device (interchangeable lens) 200 and an image pickup device (camera body) 300. The image pickup system 100 according to the present embodiment is assumed to be a camera system (lens interchangeable camera) in which the lens device 200 is detachable from the image pickup device 300. However, the image pickup system 100 may be a camera system (lens integrated camera) in which the lens device 200 and the image pickup device 300 are integrated with each other.

The lens device 200 includes a lens group 201, a lens drive unit 202, an aperture 203, a lens microcomputer 204, a runout detection unit 205, an operation amount detection unit 206, an operation ring 207, a storage unit 208, a lens mount 209, a lens terminal 210, and a runout. It has a correction device 400. The image pickup device 300 includes a camera mount 301, a camera microcomputer 302, an image pickup element 303, a shutter 304, a camera display unit 305, and a camera terminal 306.

The lens group 201 is composed of at least one lens that can move in the optical axis direction. The lens driving unit 202 is a means for moving the lens group 201 in the optical axis direction during zooming or focusing, and is, for example, a stepping motor, a vibration type motor, a voice coil motor, or the like. The diaphragm 203 is an aperture diaphragm that adjusts the amount of light directed toward the image pickup apparatus 300 by changing the aperture diameter. The shake correction device 400 is a device for correcting image shake caused by a user's camera shake or the like at the time of imaging by the image pickup system 100.

An image (optical image) of an object (subject) is formed by an optical system composed of a lens group 201, an aperture 203, and a shake correction device 400. The positional relationship between the lens group 201, the aperture 203, and the shake correction device 400 in the optical axis direction is not limited to that shown in FIG. 1, and may be changed as necessary. The lens group 201 and the aperture 203 may be moved at the same time (integrally) during zooming or focusing. Further, the lens device 200 may have a lens group other than the lens group 201, if necessary. In this case, the distance between adjacent lens groups changes during zooming and focusing.

The lens microcomputer 204 is a means for controlling the lens driving unit 202, the aperture 203, and the runout correction device 400, and is configured to be communicable with each component as shown in FIG. As the lens microcomputer 204, for example, a microcomputer configured by a processor such as an MPU or a CPU can be adopted. The runout detection unit 205 is a means for detecting the angular velocity of the lens device 200, for example, an angular velocity sensor (gyro sensor) or the like. The lens microcomputer 204 calculates the shake correction amount using the angular velocity value output from the runout detection unit 205, and controls the runout correction device 400 based on the shake correction amount.

The operation ring 207 is an operation member (rotating member) that can rotate in the rotation direction (circumferential direction) about the optical axis of the lens group 201. The operation amount detection unit 206 is a means for detecting the rotation amount of the operation ring 207, and is, for example, an encoder or the like. The operation amount detection unit 206 outputs a signal corresponding to the rotation amount of the operation ring 207, and the lens microcomputer 204 controls the lens group 201, the aperture 203, the runout correction device 400, and the like using the signal. That is, the user can operate each of these components by rotating the operation ring 207. The operation target by the operation ring 207 may be selected by the user. The storage unit 208 is a means (memory) for storing information about the lens device 200.

The lens mount 209 and the camera mount 301 are connection portions for mounting the lens device 200 on the image pickup device 300 by mechanically connecting them to each other. The lens terminal 210 and the camera terminal 306 are connection portions for enabling communication between the lens device 200 and the image pickup device 300 by electrically connecting to each other. The lens terminal 210 and the camera terminal 306 may be provided on the lens mount 209 and the camera mount 301. In other words, the lens mount 209 and the camera mount 301 may be mechanically and electrically connectable to each other. Further, when the image pickup system 100 is a lens-integrated camera, it is not necessary to have these mounts and terminals.

The image pickup element 303 is a means for taking an image of an object by receiving an image of the object formed by the lens device 200 and performing photoelectric conversion, and is a sensor such as a CCD sensor or a CMOS sensor. The image pickup surface (sensor surface) of the image pickup element 303 is arranged so as to coincide with the image plane of the lens device 200. The camera microcomputer 302 is a means for controlling the image sensor 303, the shutter 304, and the camera display unit 305. The camera microcomputer 302 can communicate with the lens microcomputer 204 via the lens terminal 210 and the camera terminal 306. For example, the camera microcomputer 302 can receive information about the lens device 200 stored in the storage unit 208 from the lens microcomputer 204, and can control each component based on this information.

The camera microcomputer 302 can generate image data using a signal output from the image sensor 303, and can display the image data on the camera display unit 305 or record it on a recording medium (not shown). In addition to the image data, the camera display unit 305 can display the state of the lens device 200, for example, the on / off state of the shake correction device 400. Further, the camera microcomputer 302 can control shooting conditions such as ISO sensitivity, white balance, and shutter speed of the image sensor 303. The shutter 304 operates in response to an instruction from the camera microcomputer 302 to control the exposure amount of the image pickup device 303. As the camera microcomputer 302, a microcomputer similar to the lens microcomputer 204 can be adopted. When the image pickup system 100 is a lens-integrated camera, it is not necessary to separate the lens microcomputer 204 and the camera microcomputer 302, and they may be integrated as a single microcomputer.

Next, the configuration of the runout correction device 400 according to this embodiment will be described in detail.

FIG. 2 is an exploded perspective view of the shake correction device 400, and FIG. 3 is a front view of the movable unit 500 in the runout correction device 400 when viewed from the image side (−Z side). Further, FIG. 4 is a front view of the runout correction device 400 excluding the second yoke 411, which will be described later, when viewed from the image side, and FIG. 5 shows the runout correction device 400 including the optical axis O and the X axis. It is a figure (YZ cross-sectional view) which shows the vertical cross-section.

The shake correction device 400 holds a fixed frame 403 and a lens 402 for image shake correction, and is a movable frame (movable lens frame) 401 that can move in a direction including a component in the direction perpendicular to the optical axis O (diameter direction). And a drive unit (movable frame drive unit) for moving the movable frame 401. The movable unit 500 shown in FIG. 3 is a unit composed of members that move during image shake correction, in other words, a unit composed of a movable frame 401 and a member attached to the movable frame 401. The movable unit 500 according to this embodiment is composed of coils 404, 405 and a flexible substrate 414, which will be described later, and a member arranged between them in the optical axis direction.

As shown in FIG. 5, the movable frame 401 is provided with a lens fitting portion (lens holding portion) 401f that holds the lens 402 by fitting the lens 402. In this embodiment, the lens 402 is fixed to the movable frame 401 by a UV adhesive (ultraviolet curable resin), but is fixed by an adhesive other than the UV adhesive or a fixing member such as a caulking or a presser ring other than the adhesive. May be. Further, the movable frame 401 is provided with a first coil 404 and a second coil 405. As shown in FIG. 3, the first coil 404 and the second coil 405 are arranged at positions where the distances from the optical axis O are equal, and their respective longitudinal directions form an angle of 90 ° with each other. The first coil 404 and the second coil 405 according to this embodiment are fixed to the movable frame 401 by a UV adhesive, but an adhesive other than the UV adhesive and a fixing member such as an adhesive tape or a screw other than the adhesive. It may be fixed by.

As shown in FIG. 2, in the fixed frame 403, a first yoke 410 for holding and positioning each magnet pair described later and a second yoke 411 for holding each magnet pair are provided with screws 416 and 417, respectively. It is fixed by. The first yoke 410 is provided with a first magnet pair 406 composed of two magnets and a third magnet pair 408 composed of two magnets. The first magnet pair 406 and the third magnet pair 408 are arranged at equal distances from the optical axis O, and their respective longitudinal directions form an angle of 90 ° with each other. The first magnet pair 406 and the third magnet pair 408 are positioned by a protrusion (not shown) formed on the first yoke 410.

Further, the second yoke 411 is provided with a second magnet pair 407 composed of two magnets and a fourth magnet pair 409 composed of two magnets. The second magnet pair 407 and the fourth magnet pair 409 are arranged at equal distances from the optical axis O, and their respective longitudinal directions form an angle of 90 ° with each other. The first magnet pair 406 and the second magnet pair 407 are arranged at positions where they overlap each other when viewed from the optical axis direction (Z direction). Similarly, the third magnet pair 408 and the fourth magnet pair 409 are also arranged at positions where they overlap each other when viewed from the optical axis direction.

The runout correction device 400 includes three rolling balls 412. Each rolling ball 412 is a means for assisting the relative movement of the movable frame 401 with respect to the fixed frame 403, and is a ball (sphere) made of a non-magnetic material such as ceramic. Each rolling ball 412 is stored in the space between the first storage portion 401a formed in the movable frame 401 and the second storage portion 403a formed in the fixed frame 403. The runout correction device 400 is configured so that the three protrusions 401e formed on the movable frame 401 come into contact with the first yoke 410 when an impact is applied from the outside. As a result, it is possible to prevent the rolling ball 412 from falling out from between the first storage portion 401a and the second storage portion 403a.

Further, the runout correction device 400 includes a tension spring 413. The tension spring 413 is attached to a first spring hooking portion 401b formed on the movable frame 401 and a second spring hooking portion 403b formed on the fixed frame 403. The movable frame 401 and the fixed frame 403 are attracted to each other by the elastic force of the tension spring 413, and the rolling ball 412 is brought into contact with the first storage portion 401a and the second storage portion 403a, whereby the movable frame 401 is brought into the fixed frame 403. Can be moved along.

The drive unit is composed of a first drive unit composed of a first coil 404, a first magnet pair 406, and a second magnet pair 407, and a second coil 405, a third magnet pair 408, and a fourth magnet pair 409. The second drive unit is included. The first drive unit can move the movable frame 401 in the X direction by the electromagnetic force generated by energizing the first coil 404. Further, the second drive unit can move the movable frame 401 in the Y direction by the electromagnetic force generated by the energization of the second coil 405. In this way, image shake correction can be performed by moving the movable frame 401 in the radial direction (in a plane perpendicular to the optical axis O). If necessary, the movable frame 401 may be configured to be movable in a direction including a component in the optical axis direction.

A flexible substrate 414 is fixed to the movable frame 401. Lead wires (not shown) connected to the first coil 404 and the second coil 405 are soldered to the soldered portions 414b provided at four locations of the flexible substrate 414 shown in FIG. The first coil 404 and the second coil 405 can be energized through the lead wire. As shown in FIG. 3, the flexible substrate 414 is provided with two Hall sensors 414a as position detecting means for detecting the relative positions of the fixed frame 403 and the movable frame 401 by utilizing the Hall effect. ing. As shown in FIG. 2, the fixed frame 403 is provided with two position detection magnets 415 as detection targets of each Hall sensor 414a.

The position detection magnets 415 are arranged at positions where the distances from the optical axis O are equal, and the longitudinal directions of the magnets 415 form an angle of 90 ° with each other. Each position detection magnet 415 is fixed to the fixed frame 403 by a UV adhesive, insert molding, or the like. Further, in a state where the surface apex (center) of the lens 402 is located on the optical axis O, the Hall sensor 414a and each position detection magnet 415 are arranged so as to overlap each other when viewed from the optical axis direction. With this configuration, the relative positions of the movable frame 401 with respect to the fixed frame 403 in the X direction and the Y direction can be detected. In this embodiment, the hall sensor 414a is adopted as the position detection means, but the present invention is not limited to this. For example, a position detection sensor using a photodiode such as a PSD (Position Sensitive Detector) may be used as the position detection means.

Next, a more detailed configuration of the movable frame 401, the fixed frame 403, and the drive unit, which are the features of the runout correction device 400, will be described.

As shown in FIGS. 4 and 5, the movable frame 401 has a first contact portion (movable frame side contact portion) 401c facing the fixed frame 403 in the radial direction. In this embodiment, the first contact portion 401c is formed on the entire circumference of the surface (outer peripheral surface) of the lens fitting portion 401f of the movable frame 401 opposite to the lens 402 in the radial direction. Further, the fixed frame 403 has a second contact portion (fixed frame side contact portion) 403c that restricts the movement of the movable frame 401 by abutting on the first contact portion 401c, and a first when the movable frame 401 moves. It has a notch 403d that does not abut on the abutting portion 401c. In this embodiment, notches 403d are provided at two points of the surface (inner peripheral surface) facing the first contact portion 401c in the radial direction of the fixed frame 403, and the second contact portion is provided at other points. 403c is provided. A part of the first contact portion 401c is a flat surface portion 401d, and a part of the second contact portion 403c is a flat surface portion 403 g (details will be described later).

Here, of the second magnet pair 407, the one closer to the optical axis O and the one farther from the optical axis O are referred to as a magnet 407a (first magnet) and a magnet 407b (second magnet), respectively. Further, of the fourth magnet pair 409, the one closer to the optical axis O and the one farther from the optical axis O are referred to as a magnet 409a (first magnet) and a magnet 409b (second magnet), respectively. At this time, the magnet 407a and the magnet 409a, which are closer to the optical axis O, are arranged at the positions of the two notched portions 403d. Each of the magnet 407a and the magnet 409a has a third contact portion (magnet side contact portion) 407c, 409c that restricts the movement of the movable frame 401 by abutting on the first contact portion 401c (401d). ..

That is, in the runout correction device 400 according to the present embodiment, the movement of the movable frame 401 is restricted by the magnet 407a and the magnet 409a instead of the fixed frame 403 in the phase in which the notch portion 403d on the inner peripheral surface of the fixed frame 403 is provided. is doing. According to this configuration, the notch portion 403d is not provided on the inner peripheral surface of the fixed frame 403, and the magnet 407a and the magnet 409a are arranged at a position farther from the optical axis O than the second contact portion 403c. In comparison with, each magnet can be brought closer to the optical axis O. Therefore, since the size of each magnet can be sufficiently increased while the fixed frame 403 is miniaturized in the radial direction, it is possible to achieve both miniaturization of the entire device and good image runout correction.

As shown in FIG. 4, when the second magnet pair 407 is viewed from the optical axis direction, the magnets 407a and 407b are arranged so that the surfaces of different magnetic poles face the same side. In other words, when viewed from the direction of the optical axis, one of the magnets 407a and 407b faces the N-pole surface and the other faces the S-pole surface. In this embodiment, the N-pole surface of the magnet 407a and the S-pole surface of the magnet 407b both face the −Z side. As a result, a force that attracts each other acts between the magnets. The same applies to the fourth magnet pair 409 as well as the second magnet pair 407.

An opening 403f is provided on the side of the fixed frame 403 opposite to the optical axis O with respect to each of the notches 403d in the radial direction. The magnets 407b and 409b farther from the optical axis O are arranged at the positions of the two openings 403f. Therefore, the magnets 407b and 409b are restricted from moving in the radial direction by the fixed frame 403, respectively. At this time, the movement of each of the magnets 407a and 409a is also restricted by the boundary portion (partition portion) between the cutout portion 403d and the opening portion 403f in the fixed frame 403. Therefore, even when a radial force is applied to the magnet 407a and the magnet 409a by the first contact portion 401c abutting on each third contact portion, the positional deviation of each magnet can be suppressed.

However, the configuration of the fixed frame 403 and the arrangement of each magnet are not limited to this. For example, two magnets may be arranged at the position of one notch 403d by expanding the notch 403d in the radial direction instead of providing the opening 403f in the fixed frame 403. In this case, for the relative positioning of the two magnets, a convex portion (projection portion) or the like may be provided on the fixed frame 403 or the second yoke 411, or a spacer may be provided between the two magnets. Further, if necessary, each magnet pair may be fixed to the fixing frame 403 with a fixing member such as an adhesive.

In this embodiment, since the third contact portions 407c and 409c have a linear shape (planar surface) in the cross section perpendicular to the optical axis O (XY cross section), the third contact portion 401c of the first contact portions 401c is matched with the third contact portions 407c and 409c. 3 It is desirable that the portions facing the contact portions 407c and 409c are also flat. As a result, the first contact portion 401c and the third contact portions 407c and 409c can have the same shape, so that it becomes easy to sufficiently secure the movement amount of the movable frame 401. In this embodiment, the flat surface portion 401d is provided at two positions of the first contact portion 401c facing the third contact portions 407c and 409c. However, if necessary, a flat surface portion 401d may be provided in addition to the portions facing the contact portions 407c and 409c.

As shown in FIG. 4, when the surface apex of the lens 402 (the center of the inner diameter of the lens fitting portion 401f) is located on the optical axis O, the distance from the optical axis O to the second contact portion 403c is L1, and the light is optical. Let L2 be the distance from the axis O to each third contact portion. Further, the distance from the first contact portion 401c to the second contact portion 403c is L3, and the distance from the first contact portion 401c to each third contact portion is L4. At this time, it is desirable that the runout correction device 400 satisfies at least one of the following conditional expressions (1) and (2).

L1> L2 (1)
L3 ≤ L4 (2)
By satisfying the conditional expression (1), each third contact portion can be arranged at a position closer to the optical axis O than the second contact portion 403c, so that the fixed frame 403 can be downsized in the radial direction. It will be possible. Further, by satisfying the conditional expression (2), the movement amount of the movable frame 401 in the phase provided with the notch portion 403d is equivalent to the movement amount of the movable frame 401 in the phase provided with the second contact portion 403c. The above can be secured. When the distance L4 is shorter than the distance L3 while satisfying the conditional expression (1), there is a possibility that the movement amount of the movable frame 401 in the phase provided with the cutout portion 403d cannot be sufficiently secured. Therefore, it is desirable to satisfy the conditional expressions (1) and (2) at the same time.

It is more preferable that the runout correction device 400 satisfies the following formula (2a) instead of the above conditional formula (2).

L3 = L4 (2a)
By satisfying the equation (2a), the movement amount of the movable frame 401 in the phase provided with the notch portion 403d is made equal to the movement amount of the movable frame 401 in the phase provided with the second contact portion 403c. Can be done. In particular, by satisfying the conditional equations (1) and (2a) at the same time, the movable frame 401 is fixed while sufficiently ensuring the strength of the portion provided with the first contact portion 401c (lens fitting portion 401f). It is possible to realize miniaturization of the frame 403 in the radial direction. On the other hand, when the distance L4 is made longer than the distance L3 while satisfying the conditional expression (1), the thickness of the lens fitting portion 401f is made thinner than necessary, so that the strength of the lens fitting portion 401f is sufficient. It may not be possible to secure it.

It should be noted that the position detection means such as the Hall sensor 414a may not be able to output an accurate value due to an arrangement error (assembly error), a component tolerance, or the like. In this case, even if the surface apex of the lens 402 is actually located on the optical axis O, the position detecting means erroneously detects that the surface apex of the lens 402 is deviated from the optical axis O. Therefore, in this embodiment, the output value of the position detection means is corrected in order to reduce the influence of the placement error and the component tolerance. First, the surface apex position of the lens 402 is calculated using the output value of the Hall sensor 414a in a state where the first contact portion 401c and the second contact portion 403c are in contact with each other. Then, a correction value is acquired based on the amount of deviation between the calculated surface apex position of the lens 402 and the actually measured surface apex position of the lens 402, and the output value of the position detecting means is corrected using this correction value. ..

Generally, the outer tolerance of a magnet is larger than the outer tolerance of the accuracy guarantee surface of other parts molded from resin. Therefore, when calculating the correction amount, the first contact portion 401c (flat surface portion 401d) and the third contact portions 407c and 409c are not in contact with each other, but the first contact portion 401c and the second contact portion. It is desirable to use the output value of the Hall sensor 414a in a state where it is in contact with the 403c. According to this method, even when the cutout portion 403d is provided in the fixed frame 403 as in the present embodiment, the output value of the Hall sensor 414a can be satisfactorily corrected.

As shown in FIG. 5, in this embodiment, the second contact portion 403c and the notch portion 403d are arranged at the same positions as the fourth magnet pair 409 in the optical axis direction. In other words, when viewed from the radial direction (Y direction), at least a part of each of the second contact portion 403c and the notch portion 403d overlaps with the fourth magnet pair 409. According to this configuration, the entire device is downsized in the optical axis direction as compared with the configuration in which the second contact portion 403c and the notch portion 403d are arranged at different positions from the fourth magnet pair 409 in the optical axis direction. be able to. However, if necessary, either one of the second contact portion 403c and the notch portion 403d may be arranged at a position different from that of the fourth magnet pair 409 in the optical axis direction. The positional relationship between the second contact portion 403c and the notch portion 403d and the second magnet pair 407 is also the same.

Further, in this embodiment, the second contact portion 403c and the notch portion 403d are arranged at the same positions as the lens 402 in the optical axis direction. In other words, when viewed from the radial direction (Y direction), at least a part of each of the second contact portion 403c and the notch portion 403d overlaps with the lens 402. In this embodiment, the first contact portion 401c, the second magnet pair 407, and the fourth magnet pair 409 are also arranged at the same positions as the lens 402 in the optical axis direction. According to this configuration, the entire device can be miniaturized in the optical axis direction. However, if necessary, either one of the second contact portion 403c and the notch portion 403d may be arranged at a position different from that of the lens 402 in the optical axis direction.

As described above, in this embodiment, the first contact portion 401c is provided on the surface of the lens fitting portion 401f of the movable frame 401 opposite to the lens 402 in the radial direction. In this way, by providing the first contact portion 401c at a position relatively close to the outer peripheral portion of the lens 402 in the movable frame 401, the second contact portion 403c is also located at a position relatively close to the outer peripheral portion of the lens 402. Can be provided. As a result, the degree of freedom in arranging the drive unit, the position detection means, and the like can be improved as compared with the case where each contact portion is provided at a position away from the outer peripheral portion of the lens 402, and the degree of freedom in arrangement of the drive portion and the position detection means can be improved in the radial direction of the entire device. Miniaturization is possible.

Further, as shown in FIGS. 4 and 5, in this embodiment, the movable frame 401 is provided with the cushioning member 418. Specifically, as shown in FIG. 5, the cushioning member 418 is wound around the entire circumference of the lens fitting portion 401f of the movable frame 401 at a position different from that of the first contact portion 401c in the optical axis direction. The cushioning member 418 is a sheet-shaped elastic member that can be elastically deformed with a relatively small force, and is made of, for example, a polymer or rubber. By providing the cushioning member 418, the impact and collision noise when the movable frame 401 comes into contact with the fixed frame 403, the magnet 407a, and the magnet 409a can be reduced (absorbed).

As shown in FIG. 5, at a position of the fixed frame 403 different from the second contact portion 403c in the optical axis direction, a fourth contact portion 403e that abuts on the cushioning member 418 when the movable frame 401 moves is provided. It is provided. Further, at a position different from the third contact portions 407c and 409c in the optical axis direction of each of the magnet 407a and the magnet 409a, the fifth contact portion 407d that abuts on the cushioning member 418 when the movable frame 401 moves. , 409d are provided.

Here, as shown in FIGS. 4 and 5, when the surface apex of the lens 402 is located on the optical axis O, the distances from the cushioning member 418 to the fourth contact portion 403e are L5 and the distances from the cushioning member 418 are respectively. Let L6 be the distance to the fifth contact portion. At this time, it is desirable that the runout correction device 400 satisfies at least one of the following conditional expressions (3) and (4).

L3> L5 (3)
L4> L6 (4)
By satisfying the conditional expression (3), the cushioning member 418 causes the fourth contact portion 403e before the first contact portion 401c comes into contact with the second contact portion 403c when the movable frame 401 moves. Will come into contact with. Then, after the cushioning member 418 abuts on the fourth abutting portion 403e, the cushioning member 418 elastically deforms, so that the first abutting portion 401c abuts on the second abutting portion 403c. Therefore, by satisfying the conditional expression (3), it is possible to reduce the impact and the collision sound when the movable frame 401 comes into contact with the fixed frame 403. However, if necessary, L3 = L5 may be set.

Further, by satisfying the conditional expression (4), when the movable frame 401 moves, the first contact portion 401c (flat surface portion 401d) is buffered before it comes into contact with the third contact portions 407c and 409c. The member 418 comes into contact with the fifth contact portions 407d and 409. Then, after the cushioning member 418 abuts on the fifth contact portions 407d and 409, the cushioning member 418 is elastically deformed so that the first contact portion 401c (flat surface portion 401d) becomes the third contact portions 407c and 409c. Contact. Therefore, by satisfying the conditional expression (4), it is possible to reduce the impact and the collision sound when the movable frame 401 comes into contact with the magnet 407a and the magnet 409a. However, if necessary, L4 = L6 may be set.

As shown in FIG. 4, a part of the second contact portion 403c according to the present embodiment is a flat surface portion 403 g. As a result, it is not necessary to use the second contact portion 403c and the fourth contact portion 403e as the accuracy guarantee surface while the flat surface portion 403 g is formed as the accuracy guarantee surface, so that the fixed frame 403 is manufactured. Will be easier. However, if necessary, the flat surface portion 403 g may have a curved surface shape similar to that of the fourth contact portion 403e. In this case, the entire circumference of the inner peripheral surface of the fixed frame 403 except for the portion where the cutout portion 403d is provided may be the curved second contact portion 403c. In this embodiment, at each position on the inner peripheral surface of the fixed frame 403 at angles of 45 °, 135 °, 225 °, and 315 ° with respect to the perpendicular line from the optical axis O to the third contact portion 409c. Although the flat surface portion 403 g is provided, the arrangement and number of the flat surface portions 403 g are not limited to this.

Further, as shown in FIG. 5, in this embodiment, the second contact portion 403c protrudes from the fourth contact portion 403e toward the optical axis O, but the second contact portion 403e is second with respect to the fourth contact portion 403e. The contact portion 403c may be provided in the same plane without protruding. Similarly, in the present embodiment, the first contact portion 401c protrudes in the direction away from the optical axis O from the portion of the movable frame 401 where the cushioning member 418 is provided, but the first contact portion 401c protrudes. Instead, they may be provided in the same plane.

If necessary, the cushioning member 418 may be provided at the same position as the first contact portion 401c in the movable frame 401. In this case, it is considered that the cushioning member 418 is a part of the movable frame 401, and that the cushioning member 418 is provided with the first contact portion 401c (the first contact portion 401c is composed of the cushioning member 418). be able to. Similarly, the fourth contact portion 403e may be provided at the same position as the second contact portion 403c, or the fifth contact portions 407d and 409d may be provided at the same position as the third contact portions 407c and 409c. ..

[Modification example]
Although the preferred embodiments and examples of the present invention have been described above, the present invention is not limited to these embodiments and examples, and various combinations, modifications and modifications can be made within the scope of the gist thereof.

The drive unit according to the above-described embodiment has both a first drive unit and a second drive unit, but is not limited thereto. For example, when the movable frame 401 is moved in only one direction, a configuration may be adopted in which the drive unit has only one of the first drive unit and the second drive unit. Further, the configurations of the first drive unit and the second drive unit may be different from each other. For example, when reducing the amount of movement of the movable frame 401 in either the X direction or the Y direction, the size of one of the first drive unit and the second drive unit may be reduced. At this time, the drive unit having the smaller size does not have to satisfy the above-mentioned characteristics (conditional expressions, etc.) of the first embodiment.

Further, the movable frame 401 according to the above-described embodiment has a first contact portion 401c provided on the entire circumference of the outer peripheral surface of the lens fitting portion 401f, but the present invention is not limited to this. For example, even if a portion (recess, cutout, etc.) that does not abut on the second contact portion 403c or each third contact portion when the movable frame 401 is moved is provided on a part of the outer peripheral surface of the lens fitting portion 401f. good. Similarly, a portion (recess, cutout, etc.) that does not abut on the first contact portion 401c when the movable frame 401 moves may be provided between the second contact portion 403c and the notch portion 403d. However, in order to appropriately control the movement of the movable frame 401, at least one second contact portion 403c is provided between the two notch portions 403d, that is, in the circumferential direction, as shown in FIG. It is desirable that the two notches 403d are not adjacent to each other.

400 Runout correction device 401 Movable frame 401c First contact part (curved surface part)
401d First contact part (flat part)
402 Lens 403 Fixed frame 403c Second contact part (curved surface part)
403g 2nd contact part (flat part)
403d Notch 407a, 409a First magnet 407c, 409c Third contact

Claims (20)

With a fixed frame,
A movable frame that holds the lens and can move in the direction containing the component in the direction perpendicular to the optical axis,
A drive unit for moving the movable frame is provided.
The movable frame has a first contact portion facing the fixed frame in a direction perpendicular to the optical axis.
The fixed frame includes a second contact portion that restricts the movement of the movable frame by contacting the first contact portion, and a notch portion that does not contact the first contact portion when the movable frame moves. Have,
The drive unit includes a first magnet located at the position of the notch portion.
The first magnet is a runout correction device having a third contact portion that limits the movement of the movable frame by contacting the first contact portion. The runout correction device according to claim 1, wherein the first contact portion includes a flat surface portion facing the third contact portion in a direction perpendicular to the optical axis. When the distance from the optical axis to the second contact portion is L1 and the distance from the optical axis to the third contact portion is L2 in a state where the surface apex of the lens is located on the optical axis.
L1> L2
The runout correction device according to claim 1 or 2, wherein the conditional expression is satisfied. When the surface apex of the lens is located on the optical axis, the distance from the first contact portion to the second contact portion is L3, and the distance from the first contact portion to the third contact portion. When is L4,
L3 ≤ L4
The runout correction device according to any one of claims 1 to 3, wherein the conditional expression is satisfied. The runout correction according to any one of claims 1 to 4, wherein at least a part of the second contact portion overlaps with the first magnet when viewed from a direction perpendicular to the optical axis. Device. The runout correction device according to any one of claims 1 to 5, wherein at least a part of the notch portion overlaps with the first magnet when viewed from a direction perpendicular to the optical axis. The shake correction device according to any one of claims 1 to 6, wherein at least a part of the second contact portion overlaps with the lens when viewed from a direction perpendicular to the optical axis. The shake correction device according to any one of claims 1 to 7, wherein at least a part of the notch portion overlaps with the lens when viewed from a direction perpendicular to the optical axis. Claim 1 is characterized in that the first contact portion is provided on a surface of the holding portion for holding the lens in the movable frame, which is opposite to the lens in a direction perpendicular to the optical axis. The runout correction device according to any one of 8 to 8. The fixed frame according to any one of claims 1 to 9, wherein the fixed frame has an opening provided on the side opposite to the optical axis with respect to the notch in a direction perpendicular to the optical axis. Runout correction device. The runout correction device according to claim 10, wherein the drive unit includes a second magnet arranged at the position of the opening. The driving unit according to any one of claims 1 to 9, wherein the driving unit includes a second magnet arranged on the side opposite to the optical axis with respect to the first magnet in a direction perpendicular to the optical axis. The runout correction device described. The runout correction device according to claim 11, wherein the first magnet and the second magnet are arranged so that the surfaces of different magnetic poles face the same side. The runout correction device according to any one of claims 1 to 13, further comprising a cushioning member provided at a position different from that of the first contact portion in the optical axis direction of the movable frame. 14. The fixed frame is provided at a position different from the second contact portion in the optical axis direction, and has a fourth contact portion that comes into contact with the cushioning member when the movable frame moves. The runout correction device described in. When the surface apex of the lens is located on the optical axis, the distance from the first contact portion to the second contact portion is L3, and the distance from the cushioning member to the fourth contact portion is L5. and when,
L3> L5
The runout correction device according to claim 15, further comprising satisfying the conditional expression. The first magnet is provided at a position different from the third contact portion in the optical axis direction, and has a fifth contact portion that comes into contact with the cushioning member when the movable frame moves. The runout correction device according to any one of 14 to 16. When the surface apex of the lens is located on the optical axis, the distance from the first contact portion to the third contact portion is L4, and the distance from the cushioning member to the fifth contact portion is L6. and when,
L4> L6
The runout correction device according to claim 17, wherein the conditional expression is satisfied. A lens device comprising the shake correction device according to any one of claims 1 to 18 and a lens different from the lens. An image pickup device comprising the shake correction device according to any one of claims 1 to 18 and an image pickup element that receives light from the lens.

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