JP6099405B2 - Blur correction device and imaging device including the same - Google Patents

Description

  The present invention relates to a shake correction device that corrects a shake by displacing a movable portion with respect to a base portion, and an imaging device including the shake correction device.

  As a prior art of a camera shake correction device, for example, there is one disclosed in Patent Document 1. This camera shake correction device supports at least three balls that can rotate in contact with the surface of the stage member facing the fixed support substrate, and is provided on the surface of the fixed support substrate facing the retainer and the stage member of the fixed support substrate. And a magnetic member that is attracted to the fixed support substrate side by the magnetic force generated by the magnetic force generation device that constitutes the facing portion of the magnetic force generation device of the stage member.

  In this camera shake correction device, when a current is passed through the drive coil when camera shake occurs, the drive coil through which the current has passed generates a drive force that slides the stage plate and the image sensor. Then, the image sensor is slid in a direction to cancel the camera shake, and the image blur is corrected.

JP 2008-160947 A

  However, in the configuration of Patent Document 1, both a space for installing three balls and a space for installing a magnet are required on the fixed support substrate, which hinders downsizing. In addition, since the position where the three balls are installed is different from the position where the magnet is installed, the stage plate cannot be accurately attracted to the fixed support substrate side.

  An object of the present invention is to provide a small shake correction apparatus and an imaging apparatus including the same.

  The shake correction device according to an aspect of the present invention includes a base portion, a movable portion movable with respect to the base portion, a magnet portion installed on one of the base portion or the movable portion, A coil part installed at a position facing the other magnet part of the base part or the movable part, and the magnet part and the coil part are installed on one side with respect to the center of gravity of the movable part. A first direction magnet that forms a first direction linear actuator that generates a driving force in a first direction, a first direction coil that faces the first direction magnet, and a first direction coil that is installed on the other side with respect to the center of gravity of the movable portion. A second direction magnet that forms a second direction linear actuator that generates a driving force in a second direction orthogonal to the first direction, a second direction coil that faces the second direction magnet, and a center of gravity of the movable portion. On the other hand, the center of gravity of the movable part A rotation-direction coil opposite to the direction of rotation magnet and the direction of rotation magnet forming a rotating direction linear actuator that generates a driving force in the rotational direction with heart, characterized by having a.

  According to the shake correction apparatus according to this aspect, it is possible to provide a small shake correction apparatus.

It is a figure which shows the blurring correction apparatus 10 before the assembly of 1st Embodiment. It is a figure which shows the cross section corresponding to the AA cross section of FIG. 1 in the shake correction apparatus 10 after the assembly of 1st Embodiment. It is a figure which shows the base part 11 of the blurring correction apparatus 10 of 1st Embodiment. It is a figure which shows the base part 11 of the blurring correction apparatus 10 of 2nd Embodiment. It is a figure which shows the base part 11 of the blurring correction apparatus 10 of 3rd Embodiment. It is a figure which shows the base part 11 of the blurring correction apparatus 10 of 4th Embodiment. It is a figure which shows the base part 11 of the blurring correction apparatus 10 of 5th Embodiment. It is a figure which shows the blurring correction apparatus 20 before the assembly of 6th Embodiment. It is a figure which shows the blurring correction apparatus 20 before the assembly of 6th Embodiment seen from the other side of FIG. It is a figure which shows the cross section corresponding to the BB cross section of FIG. 8 in the shake correction apparatus 20 after the assembly of 6th Embodiment. It is a figure which shows the imaging device provided with the blurring correction apparatus of 1st Embodiment. It is a figure which shows the blurring correction apparatus etc. in an imaging device. It is a block diagram which shows the control structure of the digital camera of this embodiment.

  Hereinafter, an embodiment of the present invention will be described.

  FIG. 1 is a diagram illustrating a shake correction apparatus 10 before assembly according to the first embodiment. FIG. 2 is a view showing a cross section corresponding to the AA cross section of FIG. 1 in the shake correction apparatus 10 after assembly according to the first embodiment. FIG. 3 is a diagram illustrating the base 11 of the shake correction apparatus 10 according to the first embodiment.

  The shake correction device 10 of the first embodiment includes a base part 11, a magnet part 12, a sliding part 13, a rolling element part 14, a movable part 15, a coil part 16, an urging part 17, A position detection unit 18 and a fixing unit 19 are provided.

Base unit 11 includes a base main body 11 _1, a first support member 11a, a second support member 11b, a third support member 11c, and a fourth support member 11d, a.

The base body 11 ₁ is made of a substantially rectangular and flat member made of a magnetic material such as iron or a compound of iron, and the magnet portion 12 is installed thereon. The first support member 11a, the second support member 11b, a third support member 11c, and a fourth support member 11d, in a state sandwiched movably the movable portion 15 in a base body 11 ₁ and the fixing unit 19, group platform provided for the purpose of supporting the fixing unit 19 to the main body 11 _1, for example, a hole screw into the support members 11a~11d penetrates provided, even through the screw fixing portion 19 as a structure to tighten the respective holes Good. In the present embodiment, the number of support members 11 is four. However, the present invention is not limited to this, and the number of support members 11 is less than 4 or 5 as long as the fixing portion 19 can be supported on the base body 11 _1. The above support members may be provided.

  Here, as shown in FIG. 1, the X direction as the first direction, the Y direction as the second direction orthogonal to the X direction, and the rotation direction around the center of gravity of the movable portion 15 are defined.

  The magnet unit 12 includes a first permanent magnet 12a as a first direction first magnet, a second permanent magnet 12b as a first direction second magnet, a third permanent magnet 12c as a second direction magnet, and a rotation direction. And a fourth permanent magnet 12d as a magnet.

The first permanent magnet 12a becomes a movable portion side first magnet 12a ₁ and the movable portion side from the second magnet 12a ₂ magnetized in the N pole is magnetized to the S pole. The first permanent magnet 12a is installed so that the first magnet 12a ₁ and the second magnet 12a ₂ are aligned in the X direction.

The second permanent magnet 12b includes a third magnet 12b ₁ magnetized on the movable part side as an S pole and a fourth magnet 12b ₂ magnetized on the movable part side as an N pole. The second permanent magnet 12b is installed so that the third magnet 12b ₁ and the fourth magnet 12b ₂ are aligned in the X direction, like the first permanent magnet 12a.

The third permanent magnet 12c is a sixth magnet 12c ₂ of the fifth magnet 12c ₁ and the movable portion of the movable portion is magnetized to the S pole are magnetized in N-pole. The third permanent magnet 12c, the magnet 12c ₂ of the fifth magnet 12c ₁ and 6 are disposed so as to line up in the Y direction.

The fourth permanent magnet 12d is composed of the eighth magnet 12d ₂ of the seventh magnet 12d ₁ and the movable portion of the movable portion is magnetized to the S pole are magnetized in N-pole. The fourth permanent magnet 12d, the magnet 12d ₂ of the seventh magnet 12d ₁ and 8 in the same way that the first permanent magnet 12a, is disposed so as to line up in the X direction.

  The first permanent magnet 12a, the second permanent magnet 12b, and the fourth permanent magnet 12d may have both the S pole and the N pole reversed. The third permanent magnet 12c may have the S pole and the N pole reversed. The magnets of the first permanent magnet 12a, the second permanent magnet 12b, the third permanent magnet 12c, and the fourth permanent magnet 12d may be separated or partly separated. By making it a separate body, processing becomes simple, and it becomes possible to manufacture easily at low cost.

  Moreover, the method of fixing each magnet to the base part 11 is not specifically limited, such as an adhesive, screwing or caulking. In 1st Embodiment, it fixes to the base part 11 with the adhesive agent as an example.

The movable portion 15, the movable body 15 _1, a first coil receiving portion 15a as a first direction coil receiving portion, and a second coil housing portion 15b of the first direction coil receiving portion, the second direction coil receiving portion and A third coil storage portion 15c as a rotational direction coil storage portion. The coil section 16 includes a first coil 16a as a first direction first coil, a second coil 16b as a first direction second coil, a third coil 16c as a second direction coil, and a rotation direction coil. A fourth coil 16d.

Movable body 15 ₁ is made of, for example, a non-magnetic material such as aluminum alloy or synthetic resin, having an imaging element 15 _2, etc. for photoelectrically converting the received light. Movable body 15 _1, Other, mounting the electric element or the like for processing a video signal or the like based on received light amount filter group and the imaging element was detected consisting ultrasound filter and infrared cut filter or the like (not shown). Movable body 15 _1, than the coil receiving portion 15a to 15c, a long length in the Z direction orthogonal to the X and Y directions.

The first coil housing portion 15a is provided at a position corresponding to the first permanent magnet 12a projecting in one respect to the center of gravity from the periphery of the movable body 15 _1. The first coil housing portion 15a is formed with a first coil housing recess 15a ₁ having an opening on the first permanent magnet 12a side corresponding to the first coil 16a, and the first coil 16a is formed in the first coil housing recess 15a ₁ . Is stored. A first rolling element storage recess 15a ₂ is formed inside the first coil storage recess 15a ₁ .

The second coil housing portion 15b is provided at a position corresponding to the second permanent magnet 12b to protrude to one with respect to the center of gravity from the periphery of the movable body 15 _1. The second coil storage portion 15b is formed with a second coil storage recess 15b ₁ having an opening on the second permanent magnet 12b side corresponding to the second coil 16b, and the second coil storage recess 15b ₁ has a second coil 16b. Is stored. A second rolling element storage recess 15b ₂ is formed inside the second coil storage recess 15b ₁ .

The third coil receiving portion 15c, the third permanent magnet 12c and the fourth permanent protrudes other side opposite to the first coil housing portion 15a and the second coil housing portion 15b with respect to the center of gravity from the periphery of the movable body 15 ₁ It is provided at a position corresponding to the magnet 12d. The third coil receiving portion 15c, the third coil 16c and the third coil housing recess 15c ₁ and the fourth coil housing recess obtained by the third permanent magnet 12c and the fourth opening permanent magnet 12d side to correspond to the fourth coil 16d 15d ₁ is formed, the third coil 16c and the fourth fourth coil 16d in the coil housing recess 15d ₁ is stored in the third coil housing recess 15c _1. Further, a third rolling element storage recess 15c ₂ is formed inside the third coil storage recess 15c. Further, a position detection storage recess 15d ₂ is formed inside the fourth coil storage recess 15d ₁ .

  The first coil 16a is composed of a winding made of an electric conductor, has a core portion formed of a core such as air inside the winding, and is installed facing the first permanent magnet 12a. The second coil 16b is formed of a winding of an electric conductor, has a core portion formed of a core such as air inside the winding, and is disposed to face the second permanent magnet 12b. The 3rd coil 16c consists of a winding of an electric conductor, has a core part formed from cores, such as air, inside the winding, and is installed facing the 3rd permanent magnet 12c. The fourth coil 16d is formed of a winding of an electric conductor, has a core portion formed of a core such as air inside the winding, and is installed to face the fourth permanent magnet 12d.

Note that, as shown in FIG., Open surface of the coils 16a, 16b, 16c are on the X-Y plane, that is, is formed in a plane parallel to the light-receiving surface of the image sensor 15 ₂ (the imaging plane). The aperture axis of each coil 16a, 16b, 16c are orthogonal direction to the X-Y plane, that is, is formed in a direction orthogonal to the light receiving surface of the image sensor 15 ₂ (the imaging plane).

A magnet-side first sliding portion 13a ₁ is installed on the surface of the first permanent magnet 12a on the first coil 16a side. A magnet-side second sliding portion 13b ₁ is installed on the surface of the second permanent magnet 12b on the second coil 16b side. A magnet-side third sliding portion 13c ₁ is installed on the surface of the third permanent magnet 12c on the third coil 16c side.

A coil-side first sliding portion 13a ₂ is installed on the bottom surface of the first rolling element housing recess 15a ₂ . A coil side second sliding portion 13b ₂ is installed on the bottom surface of the second rolling element housing recess 15b ₂ . A coil-side third sliding portion 13c ₂ is installed on the bottom surface of the third rolling element housing recess 15c ₂ .

First rolling elements 14a, second rolling member 14b, and the third rolling elements 14c, respectively, the first rolling member accommodating recess 15a _2, the second rolling member housing recess 15b _2, and the third rolling element housing recess 15c ₂ Although most of it is buried inside, a part of the movable part 15 is accommodated so as to protrude from the surface of the movable part 15 toward the magnet side. Therefore, the 1st rolling element 14a, the 2nd rolling element 14b, and the 3rd rolling element 14c are arrange | positioned at the core part inside the coil | winding of the 1st coil 16a, the 2nd coil 16b, and the 3rd coil 16c, respectively. .

  Thus, the 1st rolling element 14a, the 2nd rolling element 14b, and the 3rd rolling element 14c are arranged in the core part inside the winding of the 1st coil 16a, the 2nd coil 16b, and the 3rd coil 16c, respectively. Therefore, compared with the case where the installation positions of the first rolling element 14a, the second rolling element 14b, and the third rolling element 14c are arranged outside the first coil 16a, the second coil 16b, and the third coil 16c, respectively. Thus, the space can be used effectively, and the apparatus can be reduced in size.

Between the magnet side first sliding part 13a ₁ and the coil side first sliding part 13a ₂ , the first rolling element 14a is sandwiched so as to be rotatable. Between the magnet side second sliding portion 13b ₁ and the coil-side second sliding portion 13b _2, the second rolling element 14b is rotated movably clamped. Between the magnet side third sliding portion 13c ₁ and the coil-side third sliding portion 13c _2, the third rolling element 14c is pinched rotatably moved.

First rolling elements 14a, second rolling member 14b, and the third rolling elements 14c, respectively, between the magnets side first sliding portion 13a ₁ and the coil-side first sliding portion 13a _2, magnet-side second sliding Since it is sandwiched between the part 13b ₁ and the coil side second sliding part 13b ₂ and between the magnet side third sliding part 13c ₁ and the coil side third sliding part 13c ₂ , the first rolling element 14a, second rolling member 14b, and the third rolling element 14c is, the first permanent magnet 12a, the second permanent magnet 12b, and the third permanent magnet 12c, and the first rolling member accommodating recess 15a _2, the second rolling element housing recess 15b ₂ and the third rolling element housing recess 15c ₂ are not in direct contact with each other.

  Accordingly, the first coil storage portion 15a, the second coil storage portion 15b, the third coil storage portion 15c, and the first permanent magnet 12a, the second permanent magnet 12b, and the third permanent magnet 12c are damaged by friction. It is possible to reduce the influence of melting and the like.

  In addition, the first rolling element 14a, the second rolling element 14b, and the third rolling element 14c themselves can be less affected by damage, melting, and the like that are caused by friction.

Inside the first coil housing portion 15a of the fixed portion 19 side of the coil-side first sliding portion 13a _2, the first magnetic body 17a as an urging portion 17 is embedded. In addition, a first Hall element 18a serving as a position detection unit 18 is embedded on the fixing unit 19 side of the first magnetic body 17a.

Inside the second coil housing portion 15b of the coil-side second sliding portion 13b ₂ of the fixed portion 19 side, the second magnetic body 17b as a biasing portion 17 is embedded.

Inside the third coil receiving portion 15c of the coil-side third sliding portion 13c ₂ of the fixed portion 19 side, and the third magnetic body 17c of the biasing portion 17 is embedded. In addition, a second Hall element 18b as a position detection unit 18 is embedded on the fixing unit 19 side of the third magnetic body 17c. Furthermore, the position detection housing recess 15d _2, third Hall element 18c of the position detecting section 18 is embedded.

  Thus, the first magnetic body 17a, the second magnetic body 17b, and the third magnetic body 17c are housed inside the annular first coil 16a, second coil 16b, and third coil 16c, respectively. Compared to the case where the first magnetic body 17a, the second magnetic body 17b, and the third magnetic body 17c are arranged outside the annular first coil 16a, second coil 16b, and third coil 16c, respectively, a space is reduced. It can be used effectively and the apparatus can be miniaturized.

  The first magnetic body 17a, the second magnetic body 17b, and the third magnetic body 17c are always urged so as to be attracted to the first permanent magnet 12a, the second permanent magnet 12b, and the third permanent magnet 12c, respectively. . The first magnetic body 17a, the second magnetic body 17b, and the third magnetic body 17c are attracted to the first permanent magnet 12a, the second permanent magnet 12b, and the third permanent magnet 12c, respectively. A pressurizing force is always applied to the base part 11 side and pressed.

As a result, the first rolling element 14a abuts on the magnet side first sliding part 13a ₁ and the coil side first sliding part 13a ₂ , and the second rolling element 14b becomes the magnet side second sliding part 13b ₁ and the coil side. Abutting on the second sliding portion 13b ₂ , the third rolling element 14c abuts on the magnet side third sliding portion 13c ₁ and the coil side third sliding portion 13c _2, and is movable with respect to the base portion 11. It becomes possible to hold the position of the portion 15 accurately.

  Further, the position detection is performed by the first hall element 18a, the second hall element 18b, and the third hall element 18c, so that the movable portion 15 can be accurately moved with respect to the base portion 11.

Fixing unit 19 is formed of a magnetic material such as iron plate-shaped, in a state sandwiched movably the movable portion 15 is supported on the base body 11 _1. The fixing portion 19 may be installed at a position facing at least the first permanent magnet 12a, the second permanent magnet 12b, the third permanent magnet 12c, and the fourth permanent magnet 12d.

  The movable portion 15 may be connected to and supported by the urging member such as a spring with respect to the fixed portion 11. By being connected by the urging member, it is possible to return to a predetermined position without energizing the coil.

  The operation of the shake correction apparatus 10 of the first embodiment will be described.

  In the first embodiment, the first permanent magnet 12a and the first coil 16a form a first X-direction linear actuator LA1 as a first linear actuator that moves the movable portion 15 in the X-direction as the first direction. To do. Moreover, the 2nd permanent magnet 12b and the 2nd coil 16b form 2nd X direction linear actuator LA2 as a 1st linear actuator which moves the movable part 15 to the X direction as a 1st direction. Further, the third permanent magnet 12c and the third coil 16c form a Y-direction linear actuator LA3 as a second linear actuator that moves the movable portion 15 in the Y-direction as the second direction. Further, the fourth permanent magnet 12d and the fourth coil 16d form a rotational direction linear actuator LA4 as a third linear actuator that moves the movable portion 15 in the direction of rotation about the center of gravity G.

  The first coil 16a, the second coil 16b, the third coil 16c, and the fourth coil 16d are each connected to a power source (not shown), and are configured such that a current flows through a switch for turning on / off the power source.

  In the first embodiment, when a current is simultaneously supplied to the first coil 16a and the second coil 16b, the movable portion 15 moves by the driving force in the X direction. However, the first X-direction linear actuator LA1 and the second X-direction linear actuator LA2 are displaced upward with respect to the center of gravity G, that is, in the Y direction. Therefore, a moment is generated and the movable part 15 moves so as to rotate around the center of gravity G.

  Therefore, a current is passed through the fourth coil 16d, and the movable part 15 is driven so as to move in the direction opposite to the moving direction by the first X-direction linear actuator LA1 and the second X-direction linear actuator LA2 around the center of gravity G. The force is generated by the rotational direction linear actuator LA4. The rotation direction linear actuator LA4 of the first embodiment generates a driving force in the first direction.

  Therefore, the driving force generated by the first X-direction linear actuator LA1 and the second X-direction linear actuator LA2 and the driving force generated by the rotational direction linear actuator LA4 cancel each other out of the center of gravity G. Reduce the influence of driving force.

  When a current is passed through the third coil 16c, the driving force of the Y-direction linear actuator LA3 is on a straight line passing through the center of gravity G, so that the movable portion 15 moves in the Y direction.

  The movable portion 15 is always attracted to the first permanent magnet 12a, the second permanent magnet 12b, and the third permanent magnet 12c by the first magnetic body 17a, the second magnetic body 17b, and the third magnetic body 17c, respectively. Since it is biased, the first rolling element 14a, the second rolling element 14b, and the third rolling element 14c with respect to the rolling of the first rolling element 14a, the second rolling element 14b, and the third rolling element 14c. It is possible to move while maintaining contact with each other, and it is possible to move smoothly while maintaining a certain distance from the base portion 11. Therefore, it is possible to correct the shake with high accuracy.

The first rolling element 14a is sandwiched between the magnet side first sliding part 13a ₁ and the coil side first sliding part 13a ₂ , and the second rolling element 14b is clamped between the magnet side second sliding part 13b ₁ and the coil side _first sliding part 13a ₁ . sandwiched second sliding portion 13b _2, and the third rolling element 14c is sandwiched between the magnet side third sliding portion 13c ₁ and the coil-side third sliding portion 13c _2, first permanent magnets 12a, second permanent The magnet 12b, the third permanent magnet 12c, and the first rolling element storage recess 15a ₂ , the second rolling element storage recess 15b ₂ , and the third rolling element storage recess 15c ₂ are in direct contact with each other. Since there is no, it becomes possible to reduce the influence which friction receives between each member. Therefore, it is possible to achieve a long life of the parts and the device.

  Next, a second embodiment will be described.

  FIG. 4 is a diagram illustrating the base 11 of the shake correction apparatus 10 according to the second embodiment.

  The shake correction apparatus 10 according to the second embodiment is different from the first embodiment in the direction in which the poles of the fourth permanent magnets 12d of the rotation direction linear actuator LA4 as the third linear actuator are arranged. Description of other structures similar to those of the first embodiment is omitted.

The fourth permanent magnet 12d of the shake correcting device 10 of the second embodiment, the eighth magnet to the seventh magnet 12d ₁ and the movable portion of the movable portion is magnetized to the S pole are magnetized in the N pole consisting of 12d _2. The fourth permanent magnet 12d, the magnet 12d ₂ of the seventh magnet 12d ₁ and 8 in the same way that the third permanent magnet 12c, are disposed in alignment in the Y direction.

  Accordingly, the fourth permanent magnet 12d and the fourth coil 16d generate a driving force in the Y direction, and the rotational direction linear actuator LA4 as the third linear actuator that moves the movable portion 15 in the rotational direction around the center of gravity. Form.

  And when an electric current is sent through the 4th coil 16d, the movable part 15 moves to the rotation direction centering | focusing on the gravity center G. FIG.

  Note that the fourth permanent magnet 12d may have the S pole and the N pole reversed. In addition, the magnets of the fourth permanent magnets 12d may be separated or partly separated. By making it a separate body, processing becomes simple, and it becomes possible to manufacture easily at low cost.

  Next, a third embodiment will be described.

  FIG. 5 is a diagram illustrating the base 11 of the shake correction apparatus 10 according to the third embodiment.

  The shake correction apparatus 10 according to the third embodiment is different from the first embodiment in the direction in which the poles of the fourth permanent magnets 12d of the rotational direction linear actuator LA4 as the third linear actuator are arranged. Description of other structures similar to those of the first embodiment is omitted.

The fourth permanent magnet 12d of the shake correcting device 10 of the third embodiment, the eighth magnet to the seventh magnet 12d ₁ and the movable portion of the movable portion is magnetized to the S pole are magnetized in the N pole consisting of 12d _2. The fourth permanent magnet 12 d is installed so that the boundary line between the seventh magnet 12 d ₁ and the eighth magnet 12 d ₂ extends through the center of gravity G of the movable portion 15.

  Therefore, the fourth permanent magnet 12d and the fourth coil 16d generate a driving force in the rotation direction, and the rotation direction linear actuator LA4 as a third linear actuator that moves the movable portion 15 in the rotation direction around the center of gravity. Form. And when an electric current is sent through the 4th coil 16d, the movable part 15 moves to the direction rotated centering on the gravity center G. FIG.

  Note that the fourth permanent magnet 12d may have the S pole and the N pole reversed. In addition, the magnets of the fourth permanent magnets 12d may be separated or partly separated.

  Next, a fourth embodiment will be described.

  FIG. 6 is a diagram illustrating the base 11 of the shake correction apparatus 10 according to the fourth embodiment.

  The shake correction apparatus 10 according to the fourth embodiment is different from the third embodiment in that an X-direction linear actuator LA3 as a second linear actuator and a rotational-direction linear actuator LA4 as a third linear actuator are separated from each other. is there. Description of other structures similar to those of the first embodiment is omitted.

The fourth permanent magnet 12d of the shake correcting device 10 of the fourth embodiment, the eighth magnet to the seventh magnet 12d ₁ and the movable portion of the movable portion is magnetized to the S pole are magnetized in the N pole consisting of 12d _2. The fourth permanent magnet 12 d is installed so that the boundary line between the seventh magnet 12 d ₁ and the eighth magnet 12 d ₂ extends through the center of gravity G of the movable portion 15.

  Accordingly, the fourth permanent magnet 12d and the fourth coil 16d form a rotational direction linear actuator LA4 as a third linear actuator that moves the movable portion 15 in the direction of rotation about the center of gravity. And when an electric current is sent through the 4th coil 16d, the movable part 15 moves to the direction rotated centering on the gravity center G. FIG. Note that the fourth permanent magnet 12d may have the S pole and the N pole reversed.

  Next, a fifth embodiment will be described.

  FIG. 7 is a diagram illustrating the base 11 of the shake correction apparatus 10 according to the fifth embodiment.

  The blur correction apparatus 10 of the fifth embodiment is obtained by omitting the second X-direction linear actuator LA2 as the first linear actuator from the third embodiment. Description of other structures similar to those of the first embodiment is omitted.

The first permanent magnet 12A of the shake correcting device 10 of the fifth embodiment, the second magnet of the first magnet 12a ₁ and the movable portion side of the movable portion is magnetized to the S pole are magnetized in the N pole consisting of 12a _2. The first permanent magnet 12 d is installed so that the boundary line between the first magnet 12 a ₁ and the second magnet 12 a ₂ extends through the center of gravity G of the movable portion 15.

  Therefore, the first permanent magnet 12a and the first coil 16a form a first X-direction linear actuator LA1 as a first linear actuator that moves the movable portion 15 in the direction of rotation about the center of gravity G. And when an electric current is sent through the 1st coil 16a, the movable part 15 moves to a X direction.

  In addition, the 1st permanent magnet 12a may reverse a south pole and a north pole. Moreover, the magnets of the first permanent magnets 12a may be separated or partly separated.

  Next, a sixth embodiment will be described.

  FIG. 8 is a diagram illustrating a shake correction apparatus 20 before assembly according to the sixth embodiment. FIG. 9 is a view showing the blur correction device 20 before assembly of the sixth embodiment of FIG. 8 from the back side. FIG. 10 is a view showing a cross section corresponding to the BB cross section of FIG. 8 in the shake correcting apparatus 20 after assembly according to the sixth embodiment.

  The shake correction apparatus 20 of the sixth embodiment includes a base part 21, a magnet part 22, a sliding part 23, a rolling element part 24, a movable part 25, a coil part 26, an urging part 27, A position detection unit 28. The shake correction apparatus 20 according to the sixth embodiment has a structure in which the magnet unit 22 is installed on the movable unit 25, the coil unit 26 is installed on the base unit 21, and no fixed unit is used, and a part associated therewith is changed. It is. Description of other parts similar to those of the first embodiment is omitted.

The first support member 21a of the base portion 21, the second support member 21b, a third support member 21c, and a fourth support member 21d is at the other fixing member (not shown) such as a base main body 21 ₁ and the example camera case while sandwiching movably the movable portion 25 is for supporting the other fixing member to the base body 21 _1.

  The base portion 21 is provided with a coil housing portion 21 'including a first coil housing portion 21'a, a second coil housing portion 21'b, and a third coil housing portion 21'c.

The first coil housing portion 21'a is provided on the base body 21 ₁ at a position corresponding to the first permanent magnet 22a. The first coil storage recess 21′a ₁ is formed with a first coil storage recess 21′a ₁ having an opening on the first permanent magnet 22a side corresponding to the first permanent magnet 22a. the first coil 26a is stored in 'a _1. Further, on the inner side of the first coil housing recess 21'a _1, first rolling member accommodating recess 21'a ₂ is formed.

The second coil accommodating portion 21'b is provided on the base body 21 ₁ at a position corresponding to the second permanent magnet 22b. A second coil housing recess 21′b ₁ is formed in the second coil housing portion 21′b corresponding to the second permanent magnet 22b. The second coil housing recess 21′b ₁ has an opening on the second permanent magnet 22b side. the second coil 26b is accommodated in the 'b _1. In addition, a second rolling element storage recess 21′b ₂ is formed inside the second coil storage recess 21′b ₁ .

The third coil receiving portion 21'c are provided on the base body 21 ₁ at a position corresponding to the third permanent magnet 22c and the fourth permanent magnet 22d. The third coil housing recess 21′c is formed with a third coil housing recess 21′c ₁ having an opening on the third permanent magnet 22c side corresponding to the third permanent magnet 22c. the third coil 26c is accommodated in the 'c _1. In addition, the third coil storage portion 21′c is formed with a fourth coil storage recess 21′d ₁ having an opening on the fourth permanent magnet 22d side corresponding to the fourth permanent magnet 22d. the fourth coil 26d is accommodated in the recess 21'd _1. Further, a third rolling element storage recess 21′c ₂ is formed inside the third coil storage recess 21′c ₁ . Further, a position detection storage recess 21′d ₂ is formed inside the fourth coil storage recess 21′d ₁ .

The first coil 26a is installed in a first coil housing recess 21′a ₁ formed in the first coil housing portion 21′a so as to face the first permanent magnet 22a. The second coil 26b is disposed on the second coil housing recess 21'b ₁ formed in the second coil housing portion 21'b so as to face the second permanent magnets 22b. The third coil 26c is installed in a third coil housing recess 21′c ₁ formed in the third coil housing portion 21′c so as to face the third permanent magnet 22c. The fourth coil 26d is disposed in a fourth coil housing recess 21′d ₁ formed in the third coil housing portion 21′c so as to face the fourth permanent magnet 22d.

  Here, as shown in FIG. 8, an X direction as a first direction and a Y direction as a second direction orthogonal to the X direction are defined.

The movable portion 25 includes a movable body 25 _1, a first magnet housing portion 25a, a second magnet housing section 25b, and a third magnet housing unit 25c, a. The magnet unit 22 includes a first permanent magnet 22a, a second permanent magnet 22b, a third permanent magnet 22c, and a fourth permanent magnet 22d.

First magnet accommodating portion 25a is provided at a position corresponding to the first coil 26a protrudes from the movable body 25 _1. The first magnet storage portion 25a is formed in a box shape with the side facing the first coil 26a open, and stores the first permanent magnet 22a.

The second magnet housing portion 25b is provided at a position corresponding to the second coil 26b projects from the movable body 25 _1. The second magnet storage portion 25b is formed in a box shape with the side facing the second coil 26b open, and stores the second permanent magnet 22b.

The third magnet housing section 25c is provided at a position corresponding to the third coil 26c and the fourth coil 26d projecting from the movable body 25 _1. The third magnet storage portion 25c is formed in a box shape with the side facing the third coil 26c open, and stores the third permanent magnet 22c and the fourth permanent magnet 22d.

A structure in which the first rolling element 24a, the second rolling element 24b, and the third rolling element 24c are disposed in the core portion inside the windings of the first coil 26a, the second coil 26b, and the third coil 26c, respectively. and, first rolling elements 24a is sandwiched magnet first sliding portion 23a ₁ and the coil-side first sliding portion 23a _2, a second rolling member 24b and the second sliding portion 23b ₁ and the coil-side magnet side The structure sandwiched between the second sliding portion 23b ₂ and the third rolling element 24c between the magnet-side third sliding portion 23c ₁ and the coil-side third sliding portion 23c ₂ is the same as in the first embodiment. is there.

Inside the first coil housing portion 21'a of the base part 21 side of the coil-side first sliding portion 23a _2, the first magnetic body 27a of the biasing portion 27 is embedded. A first Hall element 28a as a position detection unit 28 is embedded on the base unit 21 side of the first magnetic body 27a.

Inside the second coil housing portion 21'b of the base part 21 side of the coil-side second sliding portion 23b _2, the second magnetic body 27b as a biasing portion 27 is embedded.

Inside the third coil receiving portion 21'c of the coil side third base portion 21 side of the sliding portion 23c _2, third magnetic body 27c of the biasing portion 27 is embedded. A second Hall element 28b as a position detection unit 28 is embedded on the base unit 21 side of the third magnetic body 27c. In addition, a position detection storage recess 21′d ₂ is formed inside the fourth coil storage recess 21′d _{1, and} a third Hall element 28c as a position detection unit 28 is embedded therein.

  The operation of the shake correction apparatus 20 of the sixth embodiment is the same as that of the first embodiment.

  According to the shake correction apparatus 20 of the sixth embodiment, in addition to the function and effect of the first embodiment, the fixing unit used in the first embodiment shown in FIG. Can be used effectively, and the apparatus can be reduced in weight.

  The shake correction apparatus according to the present embodiment as described above can be used for electronic photographing apparatuses, particularly digital cameras and video cameras. The embodiment is illustrated below.

  FIG. 11 is a diagram illustrating an imaging apparatus including the blur correction apparatus according to the first embodiment, and FIG. 12 is a diagram illustrating a blur correction apparatus and the like in the imaging apparatus.

  As shown in FIGS. 11 and 12, a digital camera 80 as an imaging apparatus including the shake correction apparatus 1 according to an embodiment of the present invention includes a camera body 81 and a photographic lens L that is interchangeably attached to the camera body 81. The lens unit 82 is provided.

  In the following description, the incident optical axis entering the camera body 81 from the photographing lens L is indicated by “O”, the subject side is the front (front side) with respect to the incident optical axis O direction, and the imaging side is the rear (Back side). Further, among the directions orthogonal to the optical axis O, the left-right direction viewed from the front in the normal photographing state is the X direction as the first direction, and the up-down direction is the Y direction as the second direction. The X direction that is the first direction and the Y direction that is the second direction correspond to the X direction that is the first direction and the Y direction that is the second direction in the shake correction apparatus 1.

  The camera body 81 includes an exterior body 83 that also serves as a camera body that accommodates members constituting the digital camera 80, and is a ring-shaped for mounting the lens unit 82 interchangeably at a front position on the incident optical axis O. A mount portion 84 is provided. The exterior body 83 is provided with a grip portion (not shown) that is held by the operator's right hand when photographing from the left side as viewed from the front. Various switches and buttons (not shown) such as a release button are arranged on the top of the grip portion.

  Further, the camera body 81 includes a battery storage chamber 92 for storing the battery 91 inside the exterior body 83. Further, behind the battery storage chamber 92, a control circuit for performing control of the entire camera, image processing, compression processing, data storage processing, a memory such as SDRAM, a circuit board on which a power supply circuit and the like are mounted (see FIG. (Not shown). Further, the camera body 81 incorporates a shake state detection device (not shown) of the camera body 81 using, for example, a gyro sensor.

  As shown in FIGS. 11 and 12, the camera body 81 further includes a liquid crystal panel 86 having a panel display window 85 on the back side of the exterior body 83. The liquid crystal panel 86 is a TFT (Thin Film Transistor) type rectangular display panel that displays various information such as various setting / adjustment items as an image in addition to a photographed image. A hot shoe 87 for mounting an optical viewfinder, an electronic viewfinder, an external flash, a microphone, or the like is disposed on the top of the exterior body 83.

As shown in FIG. 11, a focal plane shutter 88 and an imaging unit 89 are disposed in the exterior body 83 of the camera body 81. The imaging unit 89 is displaceably supported in the imaging element 15 on ₂ XY plane is a CCD or CMOS sensor or the like, and a blur correction device 10 using the linear actuator. The shake correction device 10 operates to cancel the detected force in the shake direction based on the shake signal from the shake detection device. Imaging element 15 ₂ has a rectangular light receiving surface, the long sides of the light receiving surface is disposed along the X direction. A tripod screw portion 90 is provided on the bottom surface of the exterior body 83.

  FIG. 13 is a block diagram showing an internal circuit of a main part of the digital camera 80 of the present embodiment. In the following description, the processing unit is configured by, for example, the CDS / ADC unit 124, the temporary storage memory 117, the image processing unit 118, and the like, and the storage unit is configured by a storage medium unit or the like.

  As shown in FIG. 13, the digital camera 80 is connected to the operation unit 112, the control unit 113 connected to the operation unit 112, and the control signal output port of the control unit 113 via buses 114 and 115. The imaging drive circuit 116, the temporary storage memory 117, the image processing unit 118, the storage medium unit 119, the display unit 120, and the setting information storage memory unit 121 are provided.

The temporary storage memory 117, the image processing unit 118, the storage medium unit 119, the display unit 120, and the setting information storage memory unit 121 can mutually input and output data via the bus 122. Further, the imaging drive circuit 116, the image pickup element 15 ₂ and the CDS / ADC section 124 are connected.

  The operation unit 112 includes various input buttons and switches, and notifies the control unit 113 of event information input from the outside (camera user) via these buttons. The control unit 113 is a central processing unit composed of, for example, a CPU, and has a built-in program memory (not shown) and controls the entire digital camera 80 according to a program stored in the program memory.

Imaging element 15 _2, such as a CCD is driven and controlled by the imaging drive circuit 116, the quantity of light of each pixel of the object image formed through the photographic optical system 141 into an electric signal, and outputs to the CDS / ADC section 124 It is an image sensor.

  The CDS / ADC unit 124 amplifies the electric signal input from the image sensor 36 and performs analog / digital conversion, and raw video data (Bayer data, hereinafter referred to as RAW data) obtained only by performing the amplification and digital conversion. Is output to the temporary storage memory 117.

  The temporary storage memory 117 is a buffer made of, for example, SDRAM, and is a memory device that temporarily stores RAW data output from the CDS / ADC unit 124. The image processing unit 118 reads out the RAW data stored in the temporary storage memory 117 or the RAW data stored in the storage medium unit 119, and includes distortion correction based on the image quality parameter specified by the control unit 113. It is a circuit that performs various image processing electrically.

  The storage medium unit 119 is detachably mounted with a card-type or stick-type storage medium such as a flash memory, and the RAW data transferred from the temporary storage memory 117 or the image processing unit 118 is attached to these flash memories. Image-processed image data is recorded and held.

  The display unit 120 is configured by a liquid crystal display monitor or the like, and displays captured RAW data, image data, an operation menu, and the like. The setting information storage memory unit 121 includes a ROM unit that stores various image quality parameters in advance, and a RAM unit that stores image quality parameters read from the ROM unit by an input operation of the operation unit 112.

  By adopting the lens system of the present invention as the photographic optical system 141, the digital camera 80 configured as described above can be a small-sized imaging device suitable for moving image capturing.

  In addition, this invention is not limited by this embodiment. That is, in the description of the embodiments, many specific details are included for illustration, but those skilled in the art can add various variations and modifications to these details without departing from the scope of the present invention. It will be understood that this is not exceeded. Accordingly, the exemplary embodiments of the present invention have been described without loss of generality or limitation to the claimed invention.

10, 20, 30, 40 ... blur correction devices 11, 21, 31, 41 ... base parts 12, 22, 32, 42 ... magnet parts 13, 23, 33, 43 ... sliding parts 14, 24, 34, 44 ... rolling element parts 15, 25, 35, 45 ... movable parts 16, 26, 36, 46 ... coil parts 17, 27, 37, 47 ... biasing parts 18, 28 ... position detecting part 19 ... fixed part 80 ... digital camera (Imaging device)
DESCRIPTION OF SYMBOLS 81 ... Camera body 82 ... Lens unit 83 ... Exterior body 84 ... Mount part 85 ... Panel display window 86 ... Liquid crystal panel 87 ... Hot shoe 88 ... Focal plane shutter 89 ... Imaging unit 90 ... Tripod screw part 91 ... Battery 92 ... Battery Storage chamber 112 ... Operation unit 113 ... Control units 114 and 115 ... Bus 116 ... Imaging drive circuit 117 ... Temporary storage memory 118 ... Image processing unit 119 ... Storage medium unit 120 ... Display unit 121 ... Setting information storage memory unit 122 ... Bus 124 ... CDS / ADC unit 141 ... shooting optical system

Claims (7)

A base,
A movable part movable with respect to the base part;
A magnet part installed on one of the base part or the movable part;
A coil part installed at a position facing the other magnet part of the base part or the movable part;
A plurality of rolling elements disposed between the base portion and the movable portion;
With
The magnet part and the coil part are:
A first direction magnet that forms a first direction linear actuator that is installed on one side with respect to the center of gravity of the movable part and generates a driving force in a first direction , and a position facing the first direction magnet and winding A first direction coil in which a first rolling element is disposed inside ,
A second direction magnet that forms a second direction linear actuator that is installed on the other side of the center of gravity of the movable part and generates a driving force in a second direction orthogonal to the first direction ; and the second direction magnet A second directional coil in which the second rolling element is disposed at the opposite position and inside the winding ;
A rotation direction magnet that forms a rotation direction linear actuator that is installed on the other side of the center of gravity of the movable portion and that generates a driving force in the rotation direction around the center of gravity of the movable portion , and a position facing the rotation direction magnet A rotating direction coil in which a third rolling element is disposed inside the winding ;
A shake correction apparatus comprising: The movable part is
A movable part body;
A first direction coil storage portion that protrudes from the periphery of the movable portion main body toward the center of gravity and stores the first direction coil;
A second direction coil storage portion that protrudes from the periphery of the movable portion main body to the other side with respect to the center of gravity, and stores the second direction coil;
A rotation direction coil storage part that protrudes from the periphery of the movable part main body to the other side with respect to the center of gravity, and stores the rotation direction coil;
The shake correction apparatus according to claim 1, wherein The first direction magnet has a first direction first magnet and a first direction second magnet spaced from the first direction first magnet,
The first direction coil includes a first direction first coil facing the first direction first magnet and a first direction second coil facing the first direction second magnet. The blur correction apparatus according to claim 1 or 2. The direction of rotation coil, the blur correction apparatus according to any one of claims 1 to 3, characterized in that for generating a driving force in the first direction. The shake correction apparatus according to any one of claims 1 to 3, further comprising a sliding portion that sandwiches the rolling element . 6. The shake correction apparatus according to claim 1, wherein the second direction magnet and the rotation direction magnet are integrated. The blur correction device according to any one of claims 1 to 6,
A body having the blur correction device;
An imaging apparatus comprising:

Images