JP2011248010A - Image blur correction device and image pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a smooth operation of a first drive body and a second drive body by reducing a load at the time of image blur correction.
SOLUTION: A fixing member 2, a first driving body 3 that can be rotated with a support shaft 22 extending in an optical axis direction as a fulcrum, and a second that is movable in a direction orthogonal to the optical axis direction. A first body that has a driving body 4, a lens 19 held by the first driving body or the second driving body, a first driving coil 9, and a first magnet 14 and that rotates the first driving body. Actuator 15, second actuator 21 having second drive coil 10 and second magnet 20 and moving the second drive body, and a pair of guide shafts 23, 23 for guiding the second drive body. The first actuator is disposed on the opposite side of the support shaft across the lens, and the first drive coil and the first magnet are disposed to face each other in a direction orthogonal to the optical axis direction. The axial direction of the coil is the direction orthogonal to the optical axis direction .
[Selection] Figure 1

Description

  The present invention relates to a technical field of an image blur correction apparatus and an imaging apparatus. More specifically, the present invention relates to a technical field that ensures a smooth operation of a first drive body and a second drive body by reducing a load during image blur correction.

  Some imaging devices such as a video camera and a still camera are provided with an image blur correction device that corrects an image blur by moving a lens or an imaging element in a direction orthogonal to the optical axis direction.

  Such an image blur correction device includes a first drive body that rotates with respect to the fixed member and a second drive body that moves linearly with respect to the fixed member, and the lens or the image sensor is connected to the optical axis. There is one in which image blur is corrected by moving in a direction orthogonal to the direction (see, for example, Patent Document 1).

  In the image blur correction apparatus described in Patent Document 1, the first actuator that rotates the first driving body and the second actuator that linearly moves the second driving body sandwich the lens. Are arranged in the same direction on the opposite side. The drive coil of the first actuator and the drive coil of the second actuator are arranged so that their axial directions coincide with the optical axis direction.

  The first driving body is rotated with respect to the fixing member with a supporting shaft attached to the fixing member as a fulcrum, and the second driving body is guided by a pair of guide shafts fixed to the first driving body and is linear. Moved.

JP 2007-241254 A

  By the way, in addition to the force for rotating or moving the first driving body and the second driving body in necessary directions, the first driving body and the second driving are respectively provided to the first actuator and the second actuator. Unnecessary force for moving the body in a direction other than the necessary direction is generated.

  In the image blur correction apparatus described in Patent Document 1, as described above, the first actuator and the second actuator are arranged on the opposite sides across the lens, and the first actuator drive coil and the second actuator Are arranged so that the axial directions of the drive coils of the actuator coincide with the optical axis direction. Therefore, in the image blur correction apparatus described in Patent Document 1, a force in a direction in which the second driver and the outer peripheral surfaces of the pair of guide shafts are in contact with each other is generated as the above-described unnecessary force.

  Therefore, if a force in a direction in which the second drive body and the outer peripheral surfaces of the pair of guide shafts are in contact with each other is generated in both the first actuator and the second actuator, the generated force is applied to the second drive body. It becomes a load at the time of movement, which hinders the movement operation of the second driving body.

  Therefore, the image blur correction device and the imaging device according to the present invention overcome the above-described problems and reduce the load at the time of image blur correction to ensure smooth operation of the first drive body and the second drive body. This is the issue.

  In order to solve the above-described problem, the image blur correction device includes a fixing member, a first driving body that is rotatable with respect to the fixing member about a supporting shaft that extends in the optical axis direction, and the fixing device. A second driving body that is linearly movable in a direction perpendicular to the optical axis direction with respect to the member, a lens or an imaging device held by the first driving body or the second driving body, A first actuator having a first drive coil and a first magnet arranged to face each other, a first actuator for rotating the first drive body, a second drive coil and a second arranged to face each other A second actuator having a magnet for moving the second driving body; and a pair of guide shafts that are slidably supported by the second driving body and guide the second driving body when moving. , The first actuator is the lens or the imaging The first drive coil is disposed on the opposite side of the support shaft with the child interposed therebetween, and the first drive coil of the first actuator and the first magnet are disposed to face each other in a direction perpendicular to the optical axis direction. The axial direction is a direction orthogonal to the optical axis direction.

  Therefore, in the image blur correction device, it is difficult for the first actuator to generate a force in a direction in which the second driver and the pair of guide shafts are in contact with each other.

  In the above-described image blur correction device, the first driving body and the second actuator are arranged at positions aligned in the optical axis direction, and the second driving coil and the second magnet of the second actuator are optically connected. It is desirable that the second drive coils are disposed so as to face each other in the axial direction, and the axial direction of the second drive coil is the optical axis direction.

  The first driving body and the second actuator are arranged at positions aligned in the optical axis direction, the second driving coil and the second magnet are arranged facing each other in the optical axis direction, and the axial direction of the second driving coil is set. By setting the optical axis direction, the facing surface of the second magnet to the second drive coil faces the optical axis direction.

  In the image blur correction device described above, the pair of guide shafts are fixed to the first drive body, and at least one end portion in the axial direction of the pair of guide shafts protrudes outward from the first drive body. A plurality of restriction support holes for restricting movement of the first drive body and the second drive body in the optical axis direction are respectively inserted into the fixing member in the axial direction of the guide shaft. It is desirable.

  An end portion in the axial direction of the guide shaft is inserted into the fixed member, and a restriction support hole for restricting movement of the first drive body and the second drive body in the optical axis direction is formed. The movement of the second driver in the optical axis direction is performed via the guide shaft.

  In the above-described image blur correction device, it is preferable that the first driving body is provided with a bearing sleeve supported by the support shaft and extending in the optical axis direction.

  By providing the first drive body with a bearing sleeve supported by the support shaft and extending in the optical axis direction, movement of the first drive body and the second drive body in the optical axis direction is restricted by the bearing sleeve.

  In the above-described image blur correction device, the support shaft supports the first driving body and one end portion in the axial direction is connected to the fixing member, and the other end portion in the axial direction of the support portion. Or it is desirable to provide the control part provided in the intermediate part and the outer diameter was made larger than the said support part.

  By providing the support shaft with a support portion and a restriction portion having an outer diameter larger than that of the support portion, movement of the first drive body and the second drive body in the optical axis direction is restricted by the support shaft restriction portion. .

  In order to solve the above-described problem, the imaging apparatus includes an image blur correction apparatus that corrects an image blur by moving a lens or an imaging element in a direction orthogonal to the optical axis direction, and the image blur correction apparatus includes a fixing member. And a first drive body that is rotatable with respect to the fixed member with a support shaft extending in the optical axis direction as a fulcrum, and linearly movable in a direction perpendicular to the optical axis direction with respect to the fixed member. And a first actuator having a first drive coil and a first magnet disposed opposite to each other and rotating the first drive body. A second actuator having a second driving coil and a second magnet for moving the second driving body; and the second driving body is slidably supported to move the second driving body. A pair of guide shafts for guiding at times. An imaging element is held by the first driving body or the second driving body, and the first actuator is disposed on the opposite side of the support shaft across the lens or the imaging element, and the first actuator The first drive coil and the first magnet are arranged to face each other in a direction orthogonal to the optical axis direction, and the axial direction of the first drive coil is set to a direction orthogonal to the optical axis direction.

  Therefore, in the imaging apparatus, it is difficult for the first actuator to generate a force in a direction in which the second driver and the pair of guide shafts are in contact with each other.

  The image blur correction device of the present invention includes a fixed member, a first driving body that is rotatable with respect to the fixed member about a support shaft that extends in the optical axis direction, and an optical axis direction with respect to the fixed member. A second driving body that is linearly movable in a direction perpendicular to the first driving body, and a lens or an image sensor that is held by the first driving body or the second driving body. A first actuator having a first drive coil and a first magnet and rotating the first drive body; a second drive coil and a second magnet disposed opposite to each other; A second actuator that moves the second driving body, and a pair of guide shafts that are slidably supported by the second driving body and guide the second driving body when moving, wherein the first actuator includes: Opposite the support shaft across the lens or the image sensor The first drive coil and the first magnet of the first actuator are arranged to face each other in a direction orthogonal to the optical axis direction, and the axial direction of the first drive coil is orthogonal to the optical axis direction. It is supposed to be the direction to do.

  Accordingly, since the sliding resistance with respect to the rotation operation of the first driving body is small and the sliding resistance with respect to the movement operation of the second driving body is also small, the first driving body and the second driving at the time of image blur correction are performed. The load on the body is reduced, and the smooth operation of the first drive body and the second drive body can be ensured.

  In the invention described in claim 2, the first driving body and the second actuator are arranged at positions aligned in the optical axis direction, and the second driving coil and the second actuator of the second actuator are arranged. Magnets are arranged opposite to each other in the optical axis direction, and the axial direction of the second drive coil is the optical axis direction.

  Accordingly, it is possible to reduce the size of the image blur correction apparatus in the direction orthogonal to the optical axis direction.

  In the invention described in claim 3, the pair of guide shafts are fixed to the first drive body, and at least one end portion in the axial direction of the pair of guide shafts is removed from the first drive body. A plurality of restricting support holes for restricting movement in the optical axis direction of the first driving body and the second driving body, wherein end portions in the axial direction of the guide shaft are respectively inserted into the fixing member. Is forming.

  Accordingly, it is possible to prevent the first driving body and the second driving body from being inclined and displaced in the optical axis direction with respect to the fixing member, and to ensure smooth operation of the first driving body and the second driving body. be able to.

  In the invention described in claim 4, the first drive body is provided with a bearing sleeve supported by the support shaft and extending in the optical axis direction.

  Therefore, the bearing sleeve prevents the first drive body and the second drive body from being inclined and displaced in the optical axis direction with respect to the fixing member, and ensures smooth operation of the first drive body and the second drive body. be able to.

  In the invention described in claim 5, a support portion in which the first driving body is supported on the support shaft and one end portion in the axial direction is continued to the fixing member, and an axial direction of the support portion is provided. And a restricting portion provided at the other end portion or the intermediate portion and having an outer diameter larger than that of the support portion.

  Therefore, the regulation portion prevents the first driving body and the second driving body from being inclined and displaced in the optical axis direction with respect to the fixing member of the first driving body and ensures the smooth operation of the first driving body and the second driving body. be able to.

  The imaging device of the present invention includes an image blur correction device that corrects an image blur by moving a lens or an image sensor in a direction orthogonal to the optical axis direction, and the image blur correction device extends in the optical axis direction. A first drive body that is rotatable with respect to the fixed member with a support shaft as a fulcrum, and a second drive that is linearly movable in a direction perpendicular to the optical axis direction with respect to the fixed member. A first actuator having a body, a first drive coil and a first magnet disposed opposite to each other, and rotating the first drive body; and a second drive coil disposed opposite to the body A second actuator having a second magnet and moving the second drive body, and a pair of guide shafts that are slidably supported by the second drive body and guide the second drive body during movement And the lens or the image sensor is the first drive. Or the second drive body, the first actuator is disposed on the opposite side of the support shaft with the lens or the image sensor interposed therebetween, and the first drive coil of the first actuator and the second drive coil One magnet is arranged to face in a direction orthogonal to the optical axis direction, and the axial direction of the first drive coil is set to a direction orthogonal to the optical axis direction.

  Accordingly, since the sliding resistance with respect to the rotation operation of the first driving body is small and the sliding resistance with respect to the movement operation of the second driving body is also small, the first driving body and the second driving at the time of image blur correction are performed. The load on the body is reduced, and the smooth operation of the first drive body and the second drive body can be ensured.

  The best mode for carrying out the image blur correction apparatus and the imaging apparatus of the present invention will be described below with reference to the accompanying drawings.

  In the best mode described below, the imaging apparatus of the present invention is applied to a video camera, and the image blur correction apparatus of the present invention is applied to an image blur correction apparatus provided in the video camera.

  The application ranges of the imaging apparatus and the image blur correction apparatus according to the present invention are not limited to the video camera and the image blur correction apparatus provided in the video camera, respectively. The imaging device and the image blur correction device of the present invention are, for example, an imaging device incorporated in various devices such as a still camera, a mobile phone, a PDA (Personal Digital Assistant), or an image blur correction device provided in these imaging devices. Can be widely applied.

  In the following description, it is assumed that the front, rear, top, bottom, left, and right directions are shown as viewed from the photographer when the video camera is photographed. Therefore, the subject side is the front and the photographer side is the rear.

  In addition, the front and rear, up and down, left and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

  Moreover, the lens shown below is meant to include both a lens constituted by a single lens and a lens group constituted by a plurality of lenses.

[Overall configuration of image blur correction device]
First, the image blur correction device will be described.

  Hereinafter, an embodiment of the image blur correction apparatus will be described.

  The image blur correction apparatus 1 includes a fixing member 2, a first driving body 3, and a second driving body 4 (see FIGS. 1 to 3).

  The fixing member 2 is formed in a vertically long box shape opened forward and left, and has a rear surface portion 5, an upper surface portion 6, a lower surface portion 7, and a right side surface portion 8.

  A light transmission hole 5 a is formed at the center of the rear surface portion 5. A mounting hole 5 b is formed at a position near the upper end of the rear surface portion 5.

  The upper surface portion 6 is formed with a horizontally long support hole 6a. The left half part of the upper surface part 6 is formed as a notch 6b opened forward and left.

  The lower surface portion 7 is formed with horizontally-long regulating support holes 7a, 7a that are separated from each other in the left-right direction.

  A first drive coil 9 is attached to the upper surface of the lower surface portion 7 of the fixing member 2. The first drive coil 9 is attached between the restricting support holes 7a, 7a so that the axial direction is the vertical direction, that is, the direction orthogonal to the optical axis direction.

  A second drive coil 10 is attached to the front surface of the rear surface portion 5 of the fixing member 2. The second driving coil 10 is mounted on the upper side of the light transmission hole 5a so that the axial direction is the front-rear direction, that is, the optical axis direction.

  The first driver 3 projects forward from the base surface portion 11 facing in the front-rear direction, the shaft holding surface portions 12 and 12 projecting forward from the left and right ends of the upper end portion of the base surface portion 11, and the lower end portion of the base surface portion 11. And the attached mounting portion 13.

  The base surface part 11 is formed with a vertically long transmission hole 11a, and a supported hole 11b is formed at the upper end part.

  Holding holes 12a and 12a are formed in the bearing surface portions 12 and 12, respectively.

  The attachment portion 13 is formed with holding holes 13a and 13a that are spaced apart from each other on the left and right.

  A first magnet 14 is attached to the lower surface of the attachment portion 13. The first magnet 14 constitutes a first actuator 15 together with the first drive coil 9 attached to the fixed member 2. In the first actuator 15, the first magnet 14 and the first drive coil 9 are arranged so as to face each other in the vertical direction, and the lower surface of the first magnet 14 is formed as a facing surface facing the first drive coil 9. ing.

  The second driving body 4 includes a holding surface portion 16 facing in the front-rear direction and bearing surface portions 17 and 17 projecting forward from both upper and lower end portions of the left end portion of the holding surface portion 16 and a center in the vertical direction of the right end portion of the holding surface portion 16. An L-shaped bearing projection 18 projecting forward from the portion is integrally formed. A bearing hole is formed in each of the bearing surface portions 17 and 17.

  A light transmission hole (not shown) is formed in the holding surface portion 16, and a lens 19 is attached to the holding surface portion 16 so as to cover the light transmission hole. Note that an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) may be attached to the holding surface portion 16 instead of the lens 19.

  A second magnet 20 is attached to the rear surface of the holding surface portion 16. The second magnet 20 constitutes a second actuator 21 together with the second drive coil 10 attached to the fixed member 2. In the second actuator 21, the second magnet 20 and the second drive coil 10 are disposed to face each other in the front-rear direction, and the rear surface of the second magnet 20 is formed as a facing surface that faces the second drive coil 10. ing.

  A support shaft 22 is attached to the fixing member 2 and is fixed by appropriate means such as press-fitting or adhesion. The support shaft 22 extends in the front-rear direction, that is, in the optical axis direction, and the rear end portion is inserted into the attachment hole 5 b and fixed to the fixing member 2.

  The first driving body 3 is rotatably supported on the support shaft 22. The first driving body 3 is supported by inserting the support shaft 22 into the supported hole 11b, and can be rotated in a plane perpendicular to the optical axis with respect to the fixed member 2 with the support shaft 22 as a fulcrum. .

  A pair of guide shafts 23, 23 are attached to the first driving body 3 and fixed by appropriate means such as press-fitting or adhesion. The guide shafts 23 and 23 extend in the vertical direction, that is, in the direction orthogonal to the optical axis direction, and are inserted into the holding holes 12a, 12a, 13a, and 13a, respectively, and the portions near the upper and lower ends are fixed to the first driver 3. Is done.

  The second drive body 4 is slidably supported on the guide shafts 23 and 23. The second drive body 4 is supported by one guide shaft 23 being inserted into the bearing hole of the bearing surface portions 17 and 17 and the other guide shaft 23 being engaged with the bearing protrusion 18. Can be moved linearly in the vertical direction.

  Since the second driving body 4 is supported by the first driving body 3 via a pair of guide shafts 23, 23, the first driving body 3 rotates around the support member 22 with respect to the fixed member 2. When it is moved, it is rotated integrally with the first driver 3.

  One guide shaft 23 is inserted into restriction support holes 6a and 7a formed in the fixing member 2 at both ends in the axial direction, and is supported to be slidable in the left-right direction. The other guide shaft 23 has one end (lower end) in the axial direction inserted into a restricting support hole 7 a formed in the fixing member 2 and is supported slidably in the left-right direction.

  As described above, in the image blur correction device 1, the pair of guide shafts 23 and 23 are inserted into and supported by the restriction support holes 6a, 7a, and 7a. Accordingly, it is possible to prevent the first driving body 3 and the second driving body 4 from being tilted and displaced in the front-rear direction (optical axis direction) with respect to the fixing member 2. Smooth operation of the body 4 can be ensured.

  Further, in the image blur correction apparatus 1, the first driving body 3 and the fixing member 2 for the second driving body 4 with respect to the first driving body 3 using the guide shafts 23 and 23 for guiding the second driving body 4 in the vertical direction. This prevents tilting and misalignment in the front-rear direction. Therefore, the guide shafts 23 and 23 prevent the second driving body 4 from being guided in the vertical direction and the tilting and positional deviation of the first driving body 3 and the second driving body 4 with respect to the fixing member 2 in the front-rear direction. Since it has two functions, the number of parts can be reduced.

[Operation of Image Stabilizer]
In the image blur correction device 1 configured as described above, when a current is supplied to the first drive coil 9, the left side in accordance with the direction of the supplied current in relation to the first drive magnet 14. Alternatively, thrust to the right is applied to the first driver 3. When a leftward or rightward thrust is applied to the first driving body 3, the first driving body 3 and the second driving body 4 are integrated to support the support shaft 22 with respect to the fixed member 2. Is rotated in a direction perpendicular to the optical axis direction (R direction shown in FIG. 3).

  Further, when a current is supplied to the second drive coil 10, an upward or downward thrust is applied to the second drive body 4 in accordance with the direction of the supplied current in relation to the second drive magnet 20. Is granted. When an upward or downward thrust is applied to the second driving body 4, the second driving body 4 is guided by the pair of guide shafts 23, 23 with respect to the fixing member 2, and vertically (shown in FIG. 3). S direction).

  As described above, the lens 19 or the second driving body 4 holding the image sensor is integrated with the first driving body 3 and rotated and moved in the vertical direction in a plane orthogonal to the optical axis direction. Thus, the image blur is corrected.

[Forces generated in the first actuator and the second actuator]
As described above, when a current is supplied to the first drive coil 9, the first drive body 3 is moved upward in addition to the force that causes the first actuator 15 to rotate the first drive body 3. The power to the will also occur. Accordingly, the first driving body 3 is pressed against the support shaft 22 by a force in a direction of moving upward, and becomes a load (sliding resistance) with respect to the operation of the first driving body 3.

  At this time, since the first driving body 3 is rotated, a frictional force is generated between the outer peripheral surface of the support shaft 22 and the contact point of the first driving body 3, but the contact between the frictional force generating point and the rotation center is generated. The distance corresponds to the radius of the support shaft 22 and is at a very close position. Therefore, the sliding resistance with respect to the rotational movement of the first driver 3 is very small.

  The first actuator 15 is disposed on the opposite side of the support shaft 22 with the lens 19 or the image sensor interposed therebetween, and moves in the direction in which the first driver 3 is moved upward at a position separated from the rotation fulcrum. Power is generated.

  On the other hand, when a current is supplied to the second drive coil 10, in addition to the force that causes the second actuator 21 to move the second drive body 4 in the vertical direction, the second drive body 4 moves in the forward direction. The power of will also occur. Accordingly, the second driving body 4 is pressed against the guide shafts 23 and 23 by a force in a direction of moving forward, and becomes a load (sliding resistance) against the operation of the second driving body 4.

  However, the sliding resistance with respect to the operation of the second driving body 4 is small because it hardly occurs in the first actuator 15 and is only the sliding resistance due to the force generated in the second actuator 21.

[Modification]
Hereinafter, modified examples of the image blur correction apparatus will be described (see FIGS. 4 to 7).

<First Modification>
First, an image blur correction apparatus 1A that is a first modification will be described (see FIGS. 4 and 5). In the image blur correction device 1A described below, the fixed member is not provided with an upper surface portion and the first driving body is provided with a bearing sleeve, as compared with the image blur correction device 1 described above. Only the difference. Therefore, the image blur correction apparatus 1A will be described in detail only in the parts that are different from the image blur correction apparatus 1, and the other parts are denoted by the same reference numerals as the same parts in the image blur correction apparatus 1 The description is omitted.

  The image blur correction apparatus 1 </ b> A includes a fixing member 2 </ b> A, a first drive body 3 </ b> A, and a second drive body 4.

  The fixing member 2 </ b> A has a rear surface portion 5, a lower surface portion 7, and a right side surface portion 8, and no upper surface portion is provided.

  The first driver 3 </ b> A projects forward from the base surface portion 11 facing in the front-rear direction and the shaft holding surface portions 12, 12 projecting forward from the left and right end portions of the upper end portion of the base surface portion 11 and the lower end portion of the base surface portion 11. And a bearing sleeve 24 protruding forward from the base surface portion 11. The bearing sleeve 24 is formed in a cylindrical shape, and is provided at a central portion in the left-right direction of the upper end portion of the base surface portion 11.

  A support shaft 22 is attached to the fixing member 2A, and is fixed by appropriate means such as press-fitting or adhesion. The support shaft 22 is attached to the fixing member 2 </ b> A in a state of being penetrated through the bearing sleeve 24.

  Each of the guide shafts 23, 23 is inserted into restriction support holes 7a, 7a formed in the fixing member 2A at one end portion (lower end portion) in the axial direction so as to be slidable in the left-right direction.

  As described above, in the image blur correction device 1A, the bearing sleeve 24 supported by the support shaft 22 is provided. Therefore, the regulation support holes 7a, 7a and the bearing sleeve 24 prevent the first driving body 3A and the second driving body 4 from being inclined and displaced in the front-rear direction (optical axis direction) with respect to the fixing member 2A. Smooth operation of the driving body 3A and the second driving body 4 can be ensured.

  In the image blur correction apparatus 1A, the lower ends of the guide shafts 23 and 23 are inserted into the restriction support holes 7a and 7a, respectively, and the bearing sleeve 24 disposed between the upper ends of the guide shafts 23 and 23 is provided. It is supported by the support shaft 22. Accordingly, the first driving body 3A and the second driving body 4 are supported by the fixing member 2A via the guide shafts 23 and 23 and the support shaft 22 in a state where a good balance between the upper, lower, left and right is ensured. The operation of the first driver 3A and the second driver 4 can be further smoothed.

<Second Modification>
Next, an image blur correction apparatus 1B that is a second modification will be described (see FIGS. 6 and 7). The image blur correction apparatus 1B described below is different from the image blur correction apparatus 1 described above only in that the upper surface portion is not provided on the fixing member and the restriction portion is provided on the support shaft. To do. Therefore, the image blur correction device 1B will be described in detail only in the parts different from the image blur correction device 1, and the other parts are denoted by the same reference numerals as the same parts in the image blur correction device 1. The description is omitted.

  The image blur correction device 1B includes a fixing member 2B, a first driving body 3, and a second driving body 4.

  The fixing member 2B has a rear surface portion 5, a lower surface portion 7 and a right side surface portion 8, and no upper surface portion is provided.

  A support shaft 22B is attached to the fixing member 2B, and is fixed by appropriate means such as press-fitting or adhesion. The support shaft 22B includes a round shaft-shaped support portion 22a and a restriction portion 22b provided at a front end portion of the support portion 22a or an intermediate portion in the axial direction. The restriction portion 22b is formed in a columnar shape and has an outer diameter supported. It is made larger than the outer diameter of the part 22a.

  The first driver 3 is rotatably supported on the support shaft 22B. The first driving body 3 is supported by inserting the supported portion 22a of the support shaft 22B into the supported hole 11b, and rotates around the support shaft 22B in a plane perpendicular to the optical axis with respect to the fixed member 2B. It is possible to move.

  Each of the guide shafts 23 and 23 is inserted into the restriction support holes 7a and 7a formed in the fixing member 2B at one end portion (lower end portion) in the axial direction, and is supported so as to be slidable in the left-right direction.

  As described above, in the image blur correction device 1B, the support portion 22B is provided with the restricting portion 22b. Therefore, the regulation support holes 7a, 7a and the regulation part 22b prevent the first drive body 3 and the second drive body 4 from being inclined and displaced in the front-rear direction (optical axis direction) with respect to the fixing member 2B. Smooth operation of the driving body 3 and the second driving body 4 can be ensured.

  Further, by providing the support portion 22B with the restricting portion 22b, it is possible to minimize the length of the support shaft 22B in the axial direction, and accordingly, the length of the support shaft 22B in the axial direction is shortened. The image blur correction apparatus 1B can be downsized.

[Others]
In the image blur correction apparatuses 1, 1 </ b> A, and 1 </ b> B, as described above, it is possible to perform blur correction by attaching an image sensor to the second driver 4 instead of the lens 19. When the image sensor is attached to the second driver 4, the signal reading range is determined according to the rotation angle of the first driver 3, 3 </ b> A during the rotation of the first driver 3, 3 </ b> A. By changing the above, it is possible to correct the image misalignment due to the rotation of the imaging device accompanying the rotation of the first driver 3 or 3A.

[Imaging device]
Next, an example of an imaging device will be described (see FIG. 8).

  The imaging apparatus 100 includes a camera block 110, a camera DSP (Digital Signal Processor) 120, an SDRAM (Synchronous Dynamic Random Access Memory) 130, a medium interface 140, a control block 150, an operation unit 160, an LCD (Liquid Crystal Display) 170, and an external interface. 180, and the recording medium 200 is detachable.

  As the recording medium 200, various types such as a so-called memory card using a semiconductor memory, a disc-shaped recording medium such as a recordable DVD (Digital Versatile Disk) or a recordable CD (Compact Disc), and the like can be used.

  The camera block 110 includes an imaging unit 111, a lens driving system 112, a camera shake correction system 113, and an image extraction system 114.

  The imaging unit 111 includes an imaging lens 111a for obtaining an optical image and an imaging element 111b that converts the obtained optical image into an electrical signal. As the image sensor 111b, for example, the above-described CCD or CMOS is used.

  The lens driving system 112 has a function of performing zooming and focusing by driving a movable lens in the imaging lens 111a. The lens drive system 112 includes a drive unit 112a such as a stepping motor for driving the movable lens, a driver 112b that sends a drive signal to the drive unit 112a, and a detection unit 112c that feeds back the operation of the drive unit 112a. .

  The camera shake correction system 113 includes a shake detection unit 113a such as a detection element that detects an image blur of the imaging device 100, and a driver 113c that operates the image blur correction device 113b based on the detection result of the shake detection unit 113a. The image blur correction device 113b corresponds to the image blur correction devices 1, 1A, and 1B described above.

  The image blur correction device 113b may be disposed inside the housing together with the imaging lens 111a, and the lens barrel 300 is configured by arranging the image blur correction device 113b and the imaging lens 111a in the housing. The The lens barrel 300 may be a so-called interchangeable lens that can be attached to and detached from the main body of the imaging apparatus 100, or may be a type that is provided integrally with the main body.

  The image extraction system 114 includes a timing generation circuit 114a that generates drive timing of the image sensor 111b according to control by the control block 150, a driver 114b that drives the image sensor 111b based on the timing generated by the timing generation circuit 114a, and the image sensor 111b. An A / D conversion circuit 114c for converting the analog signal extracted from the digital signal into a digital signal.

  The A / D conversion circuit 114c performs CDS (Correlated Double Sampling) processing on the input image information as an electrical signal to ensure a good S / N ratio, and performs AGC (Automatic Gain Control) processing. The gain is controlled, and A / D (Analog / Digital) conversion is performed to generate image data as a digital signal.

  The camera DSP 120 performs signal processing such as AF (Auto Focus), AE (Auto Exposure), and AWB (Auto White Balance) on the image data input from the A / D conversion circuit 114c. Image data that has undergone signal processing such as AF, AE, and AWB is data-compressed by a predetermined method, and is output to the recording medium 200 via the control block 150 for recording.

  The camera DSP 120 is provided with an SDRAM controller 121, and data is read from and written to the SDRAM 130 at a high speed according to a command from the SDRAM controller 121.

  The control block 150 includes a CPU (Central Processing Unit) 151, a RAM (Random Access Memory) 152, a flash ROM (Read Only Memory) 153, a clock circuit 154, and other components connected via a system bus 155. It is a computer and has a function of controlling each unit of the imaging apparatus 100.

  The CPU 151 sends a command signal to the driver 114b and the like via the drivers 112b and 113c and the timing generation circuit 114a, and operates these components.

  The RAM 152 is mainly used as a work area for temporarily storing intermediate results of processing.

  The flash ROM 153 stores various programs executed by the CPU 151 and data necessary for each process.

  The clock circuit 154 is a circuit that outputs the current date, current day, current time, shooting date and time, and the like.

  The operation unit 160 is a touch panel, a control key, or the like provided on the outer casing of the imaging apparatus 100. When an operation is performed on the operation unit 160, a signal corresponding to the operation is input to the CPU 151, and a command signal is sent from the CPU 151 to each unit based on the input signal.

  The LCD 170 is controlled by an LCD controller 171 connected to the system bus 155. Various information such as image data based on the drive signal of the LCD controller 171 is displayed on the LCD 170.

  The external interface 180 is connected to the system bus 155. The external interface 180 is a connection unit that connects an external device 1000 such as a personal computer to the imaging apparatus 100. When the external device 1000 is connected to the imaging apparatus 100 via the external interface 180, image data is received from the external device 1000 and recorded on the recording medium 200, or the image data recorded on the recording medium 200 is recorded on the external device. 1000 can be output. The recording medium 200 is connected to the control block 150 via the medium interface 140 connected to the system bus 155.

  In addition, by connecting an external device 1000 such as a communication module to the imaging apparatus 100 via the external interface 180, for example, various image data and other information are acquired by connecting to a network such as the Internet, and the acquired data Recording on the recording medium 200, transmission of data recorded on the recording medium 200 to the other party through the network, and the like can be performed.

  The external interface 180 can be provided as a wired interface such as IEEE (Institute of Electrical and Electronics Engineers) 1394, USB (Universal Serial Bus), etc., or can be provided as a wireless interface using light or radio waves. Is possible.

  The image data recorded on the recording medium 200 is read from the recording medium 200 based on an operation signal corresponding to an operation on the operation unit 160 performed by the user, and is transmitted to the camera DSP 120 via the medium interface 140.

  The camera DSP 120 performs decompression processing (decompression processing) on the compressed image data read out and input from the recording medium 200, and the decompressed image data is sent to the LCD controller 171 via the system bus 155. To send. The LCD controller 171 sends an image signal based on the input image data to the LCD 170, and an image based on the image signal is displayed on the LCD 170.

[Summary]
As described above, in the image blur correction devices 1, 1 </ b> A, and 1 </ b> B and the imaging device 100 including the image blur correction devices 1, the first actuator 15 is disposed on the opposite side of the support shafts 22 and 22 </ b> B with the lens 19 or the imaging device interposed therebetween. Has been placed. Further, the first drive coil 9 and the first magnet 14 of the first actuator 15 are arranged to face each other in the direction orthogonal to the optical axis direction, and the axial direction of the first drive coil 9 is orthogonal to the optical axis direction. It is considered to be a direction.

  Accordingly, since the sliding resistance with respect to the rotation operation of the first driving body 3 and 3A is small and the sliding resistance with respect to the movement operation of the second driving body 4 is also small, the first driving body 3 at the time of correcting the image blur. 3A and the load of the second driving body 4 are reduced, and the smooth operation of the first driving body 3, 3A and the second driving body 4 can be ensured.

  In addition, since the load on the operations of the first driving body 3, 3 </ b> A and the second driving body 4 is small, the first actuator 15 and the second actuator 21 can be downsized, and the image blur correction device 1. 1A, 1B and the imaging device 100 can be reduced in size.

  In particular, since the first drive coil 9 and the first magnet 14 of the first actuator 15 are arranged to face each other in a direction orthogonal to the optical axis direction, the image blur correction devices 1, 1 </ b> A, 1 </ b> B and the imaging device are arranged. Miniaturization in a direction orthogonal to the optical axis direction of 100 can be achieved.

  Furthermore, the first drive body 3 and the second actuator 21 are arranged at positions aligned in the optical axis direction, and the second drive coil 10 and the second magnet 20 are arranged to face each other in the optical axis direction. Further reduction in size in the direction orthogonal to the optical axis direction of the image blur correction apparatuses 1, 1 </ b> A, 1 </ b> B and the imaging apparatus 100 can be achieved.

  The specific shapes and structures of the respective parts shown in the above-described best mode are merely examples of the implementation of the present invention, and the technical scope of the present invention is limited by these. It should not be interpreted in a general way.

2 to 8 show an embodiment of the image blur correction apparatus of the present invention, and this figure is an exploded perspective view. FIG. It is a perspective view. It is an enlarged front view. FIG. 5 shows a first modification of the image blur correction apparatus, and FIG. 5 is an exploded perspective view. It is a perspective view. FIG. 7 shows a second modification of the image blur correction apparatus together with FIG. 7, and this figure is an exploded perspective view. It is a perspective view. It is a block diagram of an imaging device.

  DESCRIPTION OF SYMBOLS 1 ... Image blur correction apparatus, 2 ... Fixing member, 3 ... 1st drive body, 4 ... 2nd drive body, 6a ... Restriction support hole, 7a ... Restriction support hole, 9 ... 1st drive coil, DESCRIPTION OF SYMBOLS 10 ... 2nd drive coil, 14 ... 1st drive magnet, 15 ... 1st actuator, 19 ... Lens, 20 ... 2nd drive magnet, 21 ... 2nd actuator, 22 ... Support shaft, 23 ... Guide Axis, 1A ... image blur correction device, 2A ... fixing member, 3A ... first drive body, 24 ... bearing sleeve, 1B ... image blur correction device, 2B ... fixing member, 22B ... support shaft, 22b ... regulator, 100 ... Imaging device, 111b ... Imaging device, 113b ... Image blur correction device

Claims (6)

A fixing member;
A first drive body that is rotatable with respect to the fixed member with a support shaft extending in the optical axis direction as a fulcrum;
A second driving body that is linearly movable in a direction perpendicular to the optical axis direction with respect to the fixing member;
A first actuator having a first drive coil and a first magnet disposed opposite to each other and rotating the first drive body;
A second actuator having a second drive coil and a second magnet disposed opposite to each other and moving the second drive body;
A pair of guide shafts that are slidably supported by the second driving body and guide the second driving body when moving;
The lens or the image sensor is held by the first driver or the second driver,
The first actuator is disposed on the opposite side of the support shaft across the lens or the imaging element;
The first drive coil and the first magnet of the first actuator are arranged to face each other in a direction orthogonal to the optical axis direction, and the axial direction of the first drive coil is set to a direction orthogonal to the optical axis direction. Image blur correction device. The first driver and the second actuator are arranged at positions aligned in the optical axis direction,
The image blur correction according to claim 1, wherein the second drive coil and the second magnet of the second actuator are arranged to face each other in the optical axis direction, and the axial direction of the second drive coil is the optical axis direction. apparatus. Fixing the pair of guide shafts to the first drive body and projecting at least one end in the axial direction of the pair of guide shafts outward from the first drive body;
An end portion in the axial direction of the guide shaft is inserted into the fixing member, and a plurality of restricting support holes for restricting movement of the first driving body and the second driving body in the optical axis direction are formed. The image blur correction device according to 1. The image blur correction device according to claim 1, wherein a bearing sleeve supported by the support shaft and extending in the optical axis direction is provided on the first driving body. The supporting shaft is supported by the first driving body and one end in the axial direction is connected to the fixing member, and the other end or intermediate portion of the supporting portion in the axial direction is provided with an outer diameter. The image blur correction apparatus according to claim 1, further comprising a restriction portion that is larger than the support portion. An image blur correction device that corrects image blur by moving a lens or an image sensor in a direction orthogonal to the optical axis direction,
The image blur correction device includes:
A fixing member;
A first drive body that is rotatable with respect to the fixed member with a support shaft extending in the optical axis direction as a fulcrum;
A second driving body that is linearly movable in a direction perpendicular to the optical axis direction with respect to the fixing member;
A lens or an imaging device held by the first driver or the second driver;
A first actuator having a first drive coil and a first magnet disposed opposite to each other and rotating the first drive body;
A second actuator having a second drive coil and a second magnet disposed opposite to each other and moving the second drive body;
A pair of guide shafts that are slidably supported by the second driving body and guide the second driving body when moving;
The first actuator is disposed on the opposite side of the support shaft across the lens or the imaging element;
The first drive coil and the first magnet of the first actuator are arranged to face each other in a direction orthogonal to the optical axis direction, and the axial direction of the first drive coil is set to a direction orthogonal to the optical axis direction. Imaging device.

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