JP6057510B2 - Image shake correction apparatus, optical apparatus including the same, and imaging apparatus - Google Patents

Description

The present invention relates to an image shake correction apparatus, an optical apparatus including the same, and an imaging apparatus.

There has been proposed an imaging apparatus including an image blur correction apparatus that prevents image blur due to camera shake that is likely to occur during handheld shooting. Patent Document 1 discloses an imaging apparatus that integrally configures an image blur correction device and a light amount regulation driving unit. An image blur correction device included in an imaging device disclosed in Patent Document 1 includes a driving magnet that can be displaced integrally with a correction lens, and a coil that displaces the driving magnet by electromagnetic force. The image blur correction apparatus, a microcomputer, a coil, Hall element, and a feedback system, by repeating the energization of the coil while calculating the position of the correction lens holder after the coil current at a predetermined period, the camera shake correction Do.

  Further, Patent Document 2 discloses a camera shake correction device that detects a camera shake amount and performs rotation / linear control of a movable part included in an XY movable stage according to the detected camera shake amount. This camera shake correction device includes four ball bearings for keeping the distance between the movable portion and the fixed portion provided in the XY movable stage constant. The camera shake correction apparatus includes a plurality of electromagnetic actuators that are driven in the X direction or the Y direction.

JP 2007-219338 A JP 2007-232980 A

In the image blur correction device provided in the imaging device disclosed in Patent Document 1, the sizes of the driving magnet and the coil are in a predetermined range necessary for correcting the image blur according to the weight of the movable part including the correction lens. It is set to an appropriate size so that it can be driven up to. That is, if the movable part is heavy or the amount of movement necessary for correcting the image blur is large, the driving magnet and the coil tend to increase correspondingly. As a result, the overall image blur correction apparatus cannot be reduced in size.

  In addition, in the camera shake correction device disclosed in Patent Document 2, four ball bearings are arranged at a place avoiding the electromagnetic actuator. That is, this camera shake correction device is supported at four points. However, geometrically, the plane is defined by three points, and the fourth point is a point that does not actually contact unless it is constructed with a very high accuracy. If a position error of 4 points occurs, the 4th point may or may not touch. Therefore, since the camera shake correction apparatus disclosed in Patent Document 2 is supported at four points, the movement is distorted each time the movable part is driven.

  In addition, since the camera shake correction apparatus disclosed in Patent Document 2 is provided with a plurality of electromagnetic actuators, the following problems arise when attempting to support the camera shake correction apparatus at three points at a position avoiding the electromagnetic actuator. That is, the support position can be provided only at an unbalanced position with respect to the center of gravity of the movable part, or the support position must be disposed outside or inside the electromagnetic actuator. As a result, the entire apparatus becomes large.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image blur correction apparatus that can stably move and support a movable part with respect to a fixed part while suppressing the size in the radial direction from the center of the movable part.

An image shake correction apparatus according to an embodiment of the present invention includes a base member in which an opening is formed , a lens, and a first direction and a second direction orthogonal to the first direction with respect to the base member. A first drive unit that has a movable member movable to the first, a first drive coil and a second drive coil, and moves the movable member in the first direction; a third drive coil; A second driving unit that moves the movable member in the second direction, three ball members that are respectively disposed between the base member and the movable member, and three balls Three support portions that respectively support the members, and three biasing members having one end locked to the base member and the other end locked to the movable member, and an optical axis of the lens In the orthogonal direction, the first drive coil and the The second drive coil, the third drive coil, and the fourth drive coil are arranged side by side in the circumferential direction of the opening so as to sandwich the lens, and the first drive in the circumferential direction A first support portion of the three support portions and a first biasing member of the three biasing members are disposed at a position between the coil and the third drive coil, and the circumferential direction The second urging member of the three urging members and the second urging member of the three urging members are located at a position between the second driving coil and the fourth driving coil. The third support portion of the three support portions and the third of the three biasing members are disposed at a position between the first drive coil and the fourth drive coil in the circumferential direction. 3 urging members are arranged in the triangle connecting the three support parts The first support portion is disposed at a position overlapping with a part of the third coil when viewed from the optical axis direction so that the center of gravity of the movable member and the resultant force of the three biasing members are included. The second support portion is disposed at a position overlapping with a part of the second coil when viewed from the optical axis direction .

According to the image blur correction device of the present invention, it is possible to stably move and support the movable portion with respect to the fixed portion while suppressing the radial size from the center of the movable portion.

It is a figure which shows the structural example of the imaging device of this embodiment. FIG. 3 is an exploded perspective view of an image shake correction unit. It is a top view of the base member of the image blur correction unit. FIG. 4 is a cross-sectional view of the image shake correction unit shown in FIG. 3 at the AA position. It is a top view showing a base member and other parts typically. It is a top view of a drive coil. It is a figure explaining the structure of the base member in Example 2. FIG. It is a figure explaining the structure of the base member in Example 3. FIG.

  FIG. 1 is a diagram illustrating a configuration example of an imaging apparatus according to the present embodiment. In the following description, a plane perpendicular to the optical axis on which the movable part can move is defined as an X and Y plane. The optical axis is the Z direction.

The imaging apparatus shown in FIG. 1 is a camera having a lens barrel 10 and a camera body 20. The lens barrel 10 includes an image shake correction unit 11 and a drive control unit 12. The camera body 20 includes an image sensor 21. The image blur correction unit 11 performs image blur correction by shifting the correction lens L1 in a plane perpendicular to the optical axis O. In the present embodiment, the correction lens L1 functions as a correction member that corrects image blur . The lens barrel 10 has a lens group that forms an optical system together with the correction lens L1.

  The image sensor 21 is an image sensor that captures an image of a subject obtained by the optical system of the lens barrel 10. The imaging device 21 includes a charge coupled device (CCD) image sensor and a complementary metal oxide semiconductor (CMOS) image sensor.

FIG. 2 is an exploded perspective view of the image blur correction unit. FIG. 3 is a top view of the base member of the image blur correction unit. In FIG. 3, parts other than the base member 1 are schematically shown as necessary. 4 is a cross-sectional view of the image blur correction unit shown in FIG. 5A and 5B are top views schematically showing the base member and other components.

Image blur correction unit 11, a first direction the correction lens L1 in the optical axis O perpendicular plane and, by moving in the second direction to correct image blur caused by camera shake or the like. The first direction (hereinafter referred to as X direction) and the second direction (hereinafter referred to as Y direction) are directions orthogonal to each other.

The image blur correction unit 11 includes a first drive unit group having two first drive coils 2a and 2b (see FIG. 3) that drive the correction lens L1 in the X direction (first direction). The first drive coil portions 2a and 2b are two drive devices provided at positions facing each other across the correction lens L1. Further, the image blur correction unit 11 includes a second drive unit group having two second drive coils 3a and 3b that drive the correction lens L1 in the Y direction (second direction). The second drive coils 3a and 3b are also two drive devices provided at positions facing each other across the correction lens L1. The first driving device group and the second driving device group are driven and controlled independently of each other.

In addition to the correction lens L1, the image blur correction unit 11 includes a base member 1, first drive coils 2a and 2b, second drive coils 3a and 3b, a lens holder 4, balls 5a to c, tension springs 6a to c, and a sensor. A holder 7 and Hall elements 8a and 8b are provided. The first drive coils 2a and 2b are also described as the first drive coil 2. The second drive coils 3a and 3b are also described as the second drive coil 3. The balls 5a to 5c are ball members and are also described as balls 5. The tension springs 6a to 6c are also described as the tension spring 6.

  The base member 1 is provided so as to be movable along the optical axis O in conjunction with another lens group (not shown). The base member 1 has three followers 1a on the outer periphery. The follower 1a engages with a cam groove provided in a cam cylinder (not shown), and can move along the optical axis O along the cam groove.

  Furthermore, the base member 1 is provided with coil holding frames 1b, 1c, 1d, and 1e for holding drive coils described later. The drive coil is fixed by the coil holding frame. In addition, the base member 1 is provided with ball receiving surfaces 1f, 1g, and 1h that serve as ball rolling surfaces described later.

  In addition, the base member 1 is provided with a hook-shaped first locking portion 1i, a second locking portion 1j, and a third locking portion 1k that lock three biasing members described later. Each locking portion locks a tension spring 6 described later.

  The first drive coils 2a and 2b are held by two coil holding frames 1b and 1c provided on the base member 1 in the first direction (X direction). The second drive coils 3a and 3b are held by two coil holding frames 1d and 1e provided on the base member 1 in the second direction (Y direction).

  The lens holder 4 is a movable member that holds the correction lens L <b> 1 and is movable relative to the base member 1 in a direction not parallel to the optical axis O, for example, a direction orthogonal thereto. The lens holder 4 holds the correction lens L1 in a lens holding portion 4a provided at the center. In the outer periphery of the correction lens L1, a first magnet 4b magnetized in two poles and a second magnet 4c magnetized in two poles are integrally formed on the X axis. The second magnet 4c is arranged so as to sandwich the optical axis O with respect to the first magnet 4b.

  Further, on the outer periphery of the correction lens L1, a third magnet 4d magnetized in two poles and a fourth magnet 4e magnetized in two poles are integrally formed on the Y axis. The fourth magnet 4e is disposed so as to sandwich the optical axis O with respect to the third magnet 4d. The first magnets 4b and 4c are opposed to the first drive coils 2a and 2b. The second magnets 4d and 4e face the second drive coils 3a and 3b.

  When a current is passed through the first drive coils 2a and 2b, a magnetic force is generated, and the magnet receives a repulsive force or an attractive force due to the relationship between the magnetic force and the magnetic force of the first magnet 4b and the second magnet 4c. Thereby, the first magnet 4b and the second magnet 4c receive the driving force in the X direction, and the lens holder 4 can be translated in the X direction. The magnitudes of the currents flowing through the first coils 2a and 2b may be the same or different.

  Similarly, when a current is passed through the second coils 3a and 3b, a magnetic force is generated, and the magnet receives a repulsive force or an attractive force due to the relationship between the magnetic force and the magnetic force of the third magnet 4d and the fourth magnet 4e. As a result, the third magnet 4d and the fourth magnet 4e receive a driving force in the Y direction, and the lens holder 4 can be translated in the Y direction. The magnitudes of the currents flowing through the second coils 3a and 3b may be the same or different.

  Ball holding frames 4f, 4g, and 4h are provided at positions facing the ball receiving surfaces 1f, 1g, and 1h of the base member 1. The ball 5 slides within the ball holding frame. The ball holding frame is also a receiving surface of the ball 5 in the optical axis direction. In addition, the base member 1 includes a first locking portion 4 i, a second locking portion 4 j, and a third locking portion 4 k each having a hook shape that locks the tension spring 6.

  The three balls 5 a to 5 c are arranged so as to be sandwiched between the base member 1 and the lens holder 4. FIG. 4 shows the ball 5a. The balls 5b and 5c are also sandwiched between the base member 1 and the lens holder 4 with the same structure.

  As shown in FIG. 4, the ball 5a is sandwiched in the optical axis direction between the ball receiving surface 1f of the base member 1 and the flat portion in the ball receiving frame 4f of the lens holder 4 having a concave shape. The lens holder 4 is held movably with respect to the base member 1 by rolling friction caused by balls. That is, the ball and the ball receiving surface function as three support portions that support the lens holder 4 with respect to the base member 1. The ball receiving surface functions as a sliding surface on which the ball 5 slides. The ball 5 a rolls with the movement of the lens holder 4, and the rolling range is regulated by the outer wall of the ball receiving frame 4 f of the lens holder 4. The size of the ball receiving surface 1f of the base member 1 is greater than or equal to the range where the ball 5a contacts within the rolling range.

  The tension spring 6 functions as a biasing unit that biases the base member 1 and the lens holder 4 in a direction in which the ball 5 is sandwiched, that is, in a direction parallel to the optical axis O. Specifically, the ends of the tension springs 6a, 6b, and 6c are respectively connected to the locking portions 1i, 1j, and 1k provided on the base member 1 and the locking portions 4i, 4j, and 4k provided on the lens holder 4. It is energized by hooking the department. Further, the center position of the resultant force by the three tension springs 6 is in an arrangement relationship such that it is in a triangle T1 (described later) formed by connecting three ball receiving surfaces.

  The sensor holder 7 (see FIG. 1) is a component that holds the Hall element 8 and is fixed to the base member 1. The Hall element 8 is a magnetic sensor that detects magnetism. The first Hall element 8a shown in FIG. 2 is installed at a position facing the first magnet 4a formed on the lens holder 4 with a predetermined interval. The first Hall element 8a detects a change in magnetic force caused by the movement of the first magnet 4b along with the movement of the lens holder 4, and detects the position of the lens holder 4 in the X direction.

  The second Hall element 8b is installed at a position facing the fourth magnet 4e formed on the lens holder 4 with a predetermined interval. The second Hall element 8b detects a change in magnetic force caused by the movement of the fourth magnet 4e with the movement of the lens holder 4, detects the position of the lens holder 4 in the Y direction, and outputs it to the drive control unit 12. ing.

When performing the image blur correction operation, the drive control unit 12 calculates the position of the correction lens L1 based on a signal output from the Hall element 8. Then, the drive control unit 12 calculates the drive amount of the correction lens L1 based on the calculated position of the correction lens L1 and shake information obtained from a shake sensor (not shown), and sets the drive current to the first drive coil 2 and Supply to the second drive coil 3.

At the start of photographing, first, the drive control unit 12 performs a centering operation for moving the correction lens L1 to the initial position. The initial position is a position where the optical axis of the correction lens L1 coincides with the optical axes of other lens groups forming the optical system. By performing this centering operation, the range in which the correction lens L1 can be moved in the image shake correction operation during shooting becomes substantially equal in all directions, and the image shake correction operation effective for any shake during shooting. Can be done. When the image blur correction operation is not performed, shooting is performed with the correction lens L1 kept at the initial position.

  Next, Embodiment 1 of the present invention will be described with reference to FIGS. In the first embodiment, as shown in FIG. 4, the ball receiving surface 1f is disposed at a position where a part of the ball receiving surface 1f overlaps the second drive coil 3a when viewed from the optical axis direction. Similarly, the ball receiving surface 1g is arranged at a position where a part of the ball receiving surface 1g overlaps with the first drive coil 2b when viewed from the optical axis direction.

FIG. 3 shows a top view of the base member 1. The triangle T1 is a triangle formed by connecting the centers of the ball receiving surfaces 1f, 1g, and 1h. Point G is the position of the center of gravity when the lens holder 4 is in the initial position. S <b> 1 is a range where the center of gravity G of the lens holder 4 is within the movable range of the lens holder 4. In this example, the first drive coil 2 and the second drive coil 3 are arranged outside the diameter D1 with the optical axis O as the center and inside the diameter D2. The diameter D1 is, for example, the diameter of an opening provided in the base member 1 around the optical axis O, which is necessary for the lens holder 4 to move relative to the base member 1. The diameter D2 is, for example, the outer diameter of the base member 1 or the outer diameter of the image blur correction unit 11. In this example, the ball receiving surfaces 1f, 1g, and 1h that function as the three support portions are also arranged outside the diameter D1 and inside the diameter D2.

  In the first embodiment, the positions of the ball receiving surfaces 1f, 1g, and 1h are determined so that the range S1 is within the triangle T1 shown in FIG. That is, the center of gravity G of the lens holder 4 is included in a triangle connecting the three support portions that support the base member 1. Thereby, the lens holder 4 can move stably with respect to the base member 1 (fixed part).

  Here, the position of the ball receiving surface shown in FIG. In FIG. 5A, the base member 1 is expressed as 201 and the ball receiving surfaces are expressed as 201f, 201g, and 201h, respectively. If the ball receiving surfaces 101f, 101g, and 101h are provided at positions that do not overlap with the coil when viewed from the optical axis direction, the range S1 protrudes from the triangle T2 formed by connecting the three ball receiving surfaces 201f, 201g, and 201h. It will be. This indicates that when the lens holder 4 is movable and is in a position protruding from the triangle T2, the lens holder 4 is not stably supported and the lens holder may be inclined, which is not preferable.

Also, assume the position of the ball receiving surface shown in FIG. In FIG. 5B, a part corresponding to the base member 1 is represented as a base member 201 ′, and each of the ball receiving surfaces is represented as 201 ′ f, 201 ′ g, and 201 ′ h. In the example shown in FIG. 5B, the ball receiving surfaces 201′f to 201′h are provided at positions that do not overlap the drive coils 2 and 3 and are adjacent to each other in the radial direction. The range S1 can be formed without protruding from the triangle T2 ′ formed by connecting the three ball receiving surfaces 201′f, 201′g, and 201′h. However, in the base member 201 ′ shown in FIG. 5B, since the ball receiving surface is extended in the radial direction, the image blur correction unit is enlarged.

In the first embodiment, the ball receiving surface is disposed at the position described with reference to FIG. That is, at least one of the three ball receiving surfaces overlaps with the first driving coil 2 included in the first driving device group or the second driving coil 3 included in the second driving device group in the optical axis O direction. In the position. As a result, the image blur correction unit 11 can be reduced in size, and the movable lens holder 4 can be stably held.

  Furthermore, in the first embodiment, the position where the ball receiving surface overlaps with the drive coil when viewed from the optical axis direction is overlapped with a portion other than the portion that generates a magnetic force in the magnet drive direction when the drive coil is energized. It is

  FIG. 6 is a top view of the drive coil. A is an area of the coil that generates a magnetic force exerting a driving force with respect to the driving direction F of the magnet. The magnet of the lens holder 4 is sized to face the area A so that a driving force can be obtained efficiently. In the present embodiment, the ball receiving surface is installed in an area avoiding the area A in FIG. 6, and the ball receiving surface can be installed without sacrificing the size of the drive magnet.

  Further, in this embodiment, the ball receiving surface is arranged so that the biasing force center position of the three tension springs 6 is inside the triangle T1. Accordingly, the lens holder 4 can be supported and moved more stably with respect to the base member 1.

  FIG. 7 is a diagram illustrating the configuration of the base member in the second embodiment. Below, with reference to FIG. 7, the relationship between the position of 1st coil 302a, b and 2nd coil 303a, b in the base member 301 and the ball | bowl receiving surface 301f, 301g, 301h is demonstrated.

Members other than those shown in FIG. 7 are the same as those described in the description of the first embodiment. The same reference numerals as those in the first embodiment are used as they are, and the reference numerals corresponding to those in the first embodiment are used for those changed from the first embodiment. For example, the code corresponding to 1a in the first embodiment is 301a in the second embodiment. The component parts included in the image shake correction unit according to the second embodiment are the same as the component parts included in the image shake correction unit according to the first embodiment.

  Each of the first coils 302a and 302b is provided at a 180-degree rotationally symmetric position about the optical axis O. The thrust center vectors Fx1 and Fx2 of the first coils 302a and 302b are on a straight line that does not pass through the optical axis O. The thrust center vector is a center vector of drive output by the coil. In the present embodiment, by making the drive output in the first coil 302a and the drive output in the first drive coil 302b the same, the two drive resultants obtained by energizing the coils become vectors passing through the optical axis O. . That is, the resultant resultant force center vector of the first coils 302 a and 302 b passes through the optical axis O. Thereby, the lens holder 4 moves in a predetermined X direction.

  Similarly, the second drive coil 303a and the second drive coil 303b are provided at positions that are 180 degrees rotationally symmetric about the optical axis O, respectively. The thrust center vectors Fy1 and Fy2 of the second coils 303a and 303b are on a straight line that does not pass through the optical axis O. In this embodiment, by making the drive output in the second drive coil 303a the same as the drive output in the second drive coil 303b, the two drive resultants obtained by energizing the coil are the vectors passing through the optical axis O. Become. That is, the resultant resultant force center vector of the second coils 303a and 303b passes through the optical axis O. Thereby, the lens holder 4 moves in a predetermined Y direction.

In the image blur correction unit according to the second embodiment, the movable portion (lens holder) is shifted in the X direction and the Y direction within a plane orthogonal to the optical axis O. Therefore, the arrangement relationship and the output relationship are as described above. is there. However, if an image shake correction unit that freely shifts and rotates the movable portion itself is configured, the arrangement relationship and the output relationship are not limited to those described above (the same applies to Example 3 described later).

As shown in FIG. 7, a triangle T3 formed by connecting the centers of the ball receiving surfaces 301f, 301g, and 301h is a relationship that encompasses the center of gravity movable range S1 of the lens holder 4. This is because the space for the ball receiving surface can be secured by arranging the first drive coil 302 and the second drive coil 303 to be biased in the image blur correction unit. In the image blur correction unit of the second embodiment, since the triangle T3 includes S1, the image blur correction unit 11 can be reduced in size without causing the ball receiving surface to be adjacent to the coil in the radial direction with respect to the image blur correction device. Although possible, the lens holder 4 can be stably held.

In addition, the image blur correction unit according to the second embodiment has the following characteristics. In this image blur correction unit, the drive coils included in each of the first drive coil 302 and the second drive coil 303 are arranged so as to be biased in the X direction or the Y direction. Accordingly, it is possible to effectively secure a space in which the drive coil is not disposed, and to effectively use the space as a space for inserting a component protruding from a component adjacent to the image blur correction unit, for example.

  As in the first embodiment, the ball receiving surface may be provided so as to overlap the drive coil when viewed from the optical axis direction. Thereby, it can be set as the arrangement | positioning which enables the effective utilization of the further space, and the stable holding | maintenance of a ball receiving surface.

  FIG. 8 is a diagram illustrating the configuration of the base member in the third embodiment. Hereinafter, the relationship between the positions of the first drive coils 402a and 402b and the second drive coils 403a and b in the base member 401 and the ball receiving surfaces 401f, 401g, and 401h will be described with reference to FIG.

Members other than those shown in FIG. 8 are the same as those described in the description of the first embodiment. The same reference numerals as those in the first embodiment are used as they are, and the reference numerals corresponding to those in the first embodiment are used for those changed from the first embodiment. For example, the code corresponding to 1a in the first embodiment is 401a in the second embodiment. The component comprising the image shake correcting unit of the third embodiment is similar to the component comprising the image shake correcting unit in the first embodiment.

  As shown in FIG. 8, the first drive coils 402a and 402b are provided at positions where the thrust center vector passes through the optical axis O, respectively. The first drive coil 402a and the first drive coil 402b are different in size. Thereby, although the drive outputs of the two first drive coils are different, both the thrust center vectors pass through the optical axis O, and therefore, the lens holder 4 has a predetermined force due to the resultant drive force generated by the two first drive coils. Moves stably in the X direction.

  The second drive coils 403a and 403b are provided at positions where the thrust center vector passes through the optical axis O, respectively. The second drive coil 403a and the second drive coil 403b are different in size. As a result, although the drive outputs of the two second drive coils are different, the thrust center vectors both pass through the optical axis O, so that the lens holder 4 has a predetermined force due to the resultant drive force generated by the two second drive coils. Moves stably in the Y direction.

  As shown in FIG. 8, a triangle T4 formed by connecting the centers of the ball receiving surfaces 401f, 401g, and 401h is a relationship that includes the center of gravity movable range S1 of the lens holder 4. This is because the first drive coils 402a and 402b are made different in size, and the second drive coils 403a and 403b are made different in size, thereby securing the space for the ball receiving surface while ensuring the drive force. Is due to.

Image shake correcting unit according to the third embodiment, since the triangle T3 is inclusive of S1, it can be downsized image shake correcting unit without adjacent coils in the radial direction with respect to the image shake correcting unit ball receiving surface However, the lens holder can be stably held.

The image blur correction unit according to the third embodiment has the following characteristics. By changing the size of each of the two first drive coils 402 and the second drive coil 403, it is possible to effectively secure a space in which the drive coils are not arranged while increasing the drive output as much as possible. Specifically, the space where the drive coil is not disposed can be used as, for example, a space for inserting a component protruding from a component adjacent to the image blur correction unit 11.

  As in the first embodiment, the ball receiving surface may be provided so as to overlap the drive coil when viewed from the optical axis direction. Thereby, it can be set as the arrangement | positioning which enables the effective utilization of the further space, and the stable holding | maintenance of a ball receiving surface.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the scope of the present invention. In the foregoing embodiment, an example of performing moved image blur correction operation of the correction lens L1, not limited to this, for example, image blur correction unit, an image pickup device in a plane parallel to the imaging surface It may be moved to perform image blur correction. That is, the image sensor may function as a correction member that corrects image blur .

  In the above-described embodiment, the example in which the Hall element 9 is used as the position detection unit that detects the position of the correction lens L1 has been described. However, other magnetic sensors that sense magnetism, such as an MI (Magneto Impedance) sensor, a magnetic resonance type magnetic field detection element, and an MR (Magneto-Resistance) element, may be used as the position detection means. In addition to the magnetic sensor, an optical sensor that performs optical position detection may be used as the position detection means.

In addition, as an imaging apparatus including the image shake correction unit of the present embodiment, a digital still camera mainly intended for still image shooting has been described as an example, but the imaging apparatus of the present embodiment is not limited to this. The imaging device may be, for example, a film camera, a video camera whose main purpose is moving image shooting, or another type of imaging device. Further, it may be an optical device such as an interchangeable lens used in a digital single lens reflex camera.

1 Base member 4 Lens holder 5 Ball L1 Correction lens

Claims (3)

A base member in which an opening is formed ;
A movable member that holds a lens and is movable relative to the base member in a first direction and a second direction orthogonal to the first direction;
A first drive unit having a first drive coil and a second drive coil, and moving the movable member in the first direction;
A second drive unit having a third drive coil and a fourth drive coil, and moving the movable member in the second direction;
Three ball members respectively disposed between the base member and the movable member;
Three support parts for supporting the three ball members,
Three biasing members each having one end locked to the base member and the other end locked to the movable member,
In the direction orthogonal to the optical axis of the lens, the first drive coil and the second drive coil, and the third drive coil and the fourth drive coil are positioned to sandwich the lens, respectively. Arranged side by side in the circumferential direction of the opening,
At the position between the first drive coil and the third drive coil in the circumferential direction, the first support portion of the three support portions and the first biasing member of the three biasing members. A force member is arranged,
At a position between the second drive coil and the fourth drive coil in the circumferential direction, the second support part of the three support parts and the second attachment of the three urging members. A force member is arranged,
At a position between the first drive coil and the fourth drive coil in the circumferential direction, a third support portion of the three support portions and a third attachment portion of the three biasing members are provided. A force member is arranged,
The first support portion of the third coil is viewed from the optical axis direction so that the center of gravity of the movable member and the resultant force of the three biasing members are included in a triangle connecting the three support portions. Placed in a position that overlaps with a part
The image blur correction apparatus according to claim 1, wherein the second support portion is disposed at a position overlapping a part of the second coil when viewed from the optical axis direction . An optical apparatus comprising the image blur correction device according to claim 1 . An image pickup apparatus comprising the image shake correction apparatus according to claim 1 .

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