JP2010096826A - Blur correcting device of camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blur correcting device of a camera that quickly performs blur correction. <P>SOLUTION: In the blur correcting device of the camera, which corrects image blur by moving a movable part 4 on which a holder 18 supporting an imaging device 11 is arranged, the movable part 4 is pressed from a plurality of directions perpendicular to an optical axis by holding parts 55a to 55d and elastically held so that a center of the imaging device 11 may be nearly aligned with the optical axis. By biasing an X coil 23 and Y coils 24a and 24b of the movable part 4 in such a state that the movable part 4 is held by the holding parts 55a to 55d, the movable part 4 is moved on a plane perpendicular to the optical axis, so as to perform blur correction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a camera shake correction apparatus.

  Conventionally, in a camera shake correction device, a lens frame provided with a lens is provided with a conical receiver, and a plunger is inserted into the receiver by a latch solenoid to lock the movement of the lens. It is disclosed.

When the image blur device described in Patent Document 1 is used, the lens can be held at the center position without being energized. The lock mechanism can be activated, and the operation time when the lens is locked can be shortened.
Japanese Patent Laid-Open No. 9-80561

  However, in the above invention, when moving a movable part having an image sensor or the like for blur correction, it is necessary to remove the lock. While the lock is released, there is a problem that the lens cannot be moved to correct the blur, and the movable part moves to a predetermined position and the time until the blur correction is started becomes long. Further, in order to reduce the time for unlocking, the operation of the locking mechanism may be performed quickly. In this case, it is necessary to increase the driving force for moving the locking mechanism, and the driving unit that operates the locking mechanism. There is a problem that the size is increased.

  The present invention has been invented to solve such problems, and is an image blur device for a camera that reduces the time required to start moving from a state in which the movable part is held neutral, thereby reducing the size of the drive part. With the goal.

  An aspect of the present invention includes an imaging device, a holder that supports the imaging device, a support unit that supports the holder so as to be movable in a plane perpendicular to the optical axis, and a holder that is electromagnetic in a plane perpendicular to the optical axis. And a drive unit that drives the support unit with force, and in a camera shake correction device for a camera that corrects image shake due to motion by moving the image sensor, the holder is pressed from a plurality of directions perpendicular to the optical axis. The pressing unit includes a holder position holding mechanism that elastically holds the holder so that the center of the image sensor substantially coincides with the optical axis, and the driving unit holds the holder in a state where the holder position holding mechanism elastically holds the holder. The holder is moved in a plane perpendicular to the optical axis against the pressing.

  According to this aspect, the image sensor can be moved by the drive unit while the holder position holding mechanism holds the holder. For example, the image sensor is also moved before the holder is released by the holder position holding mechanism. Can be made. Therefore, for example, without increasing the size of the drive unit, the image pickup element can be quickly moved to correct the blur.

  According to the present invention, blurring can be corrected quickly.

  A digital single-lens reflex camera according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic perspective view of a digital single-lens reflex camera (hereinafter referred to as a camera) 100.

  The camera 100 includes an image sensor 11, a lens mount unit 102, an input device unit 103, and a finder unit 104.

  The imaging device 11 outputs an electrical signal corresponding to light incident on the light receiving surface at a predetermined timing, and is called, for example, a CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor) sensor. It is an image pickup device of a type or other various types.

  The image sensor 11 is disposed at a predetermined position with respect to the housing 101 via the shake correction apparatus 1. Although details will be described later, the blur correction device 1 moves the image sensor 11 in the X direction, the Y direction, and the optical axis in accordance with the amount of movement of the camera 100 at the time of imaging, thereby receiving the light receiving surface of the image sensor 11. Reduce blurring of the subject image above.

  The lens mount unit 102 has a bayonet mechanism, and detachably fixes the imaging lens 110 on the optical axis O orthogonal to the light receiving surface of the imaging element 11.

  The input device unit 103 includes button switches such as a shutter button, an exposure correction button, and a self-timer button, dial switches such as a shooting mode switching dial, and a touch panel device. The input device unit 103 is used when an operator inputs operation instruction information to the camera 100.

  The finder unit 104 includes an optical finder or an electronic viewfinder. The operator can observe the state of the photographing range with an optical image or an electronic image through the finder unit 104.

  The blur correction apparatus 1 according to the first embodiment will be described with reference to FIG. FIG. 2 is a perspective view of the shake correction apparatus 1. In the following, the optical axis and the Z direction are matched, and the direction from the surface of the image sensor 11 to the subject direction is the plus direction of the Z direction. Further, a description will be given assuming that the horizontal direction when the camera 100 is in the normal position is the X direction and the vertical direction is the Y direction. The origins in the X direction and the Y direction are on the optical axis, and when the camera 100 is set at the normal position, the right side when the camera 100 is viewed from the imaging lens 110 side is the plus in the X direction, and the top is the plus in the Y direction. Further, the positive direction of the Z direction is indicated as the Z + direction, and the negative direction is referred to as the Z− direction. The same applies to the X and Y directions. In the following description, the subject side of the camera 100 is the front surface, and the photographer side is the back surface. In the drawings shown below, coordinate axes are shown in the lower left of the figure, but for convenience of explanation, the optical axis is shifted from the X axis, Y axis, and Z axis.

  The shake correction apparatus 1 includes an image sensor driving mechanism 2 and a neutral holding mechanism (holder position holding mechanism) 3.

  Here, the image sensor driving mechanism 2 will be described with reference to FIGS. FIG. 3 is a perspective view illustrating the image sensor driving mechanism 2. FIG. 4 is an exploded perspective view showing a part of the image sensor driving mechanism 2. FIG. 5 is an exploded perspective view showing a part of the image sensor driving mechanism 2. FIG. 6 is a perspective view of a part of the image sensor driving mechanism 2 as viewed from the back.

  The imaging element driving mechanism 2 includes a movable part 4 and a yoke 28, and the movable part 4 includes an imaging wax 12, a holder 18, and a dust prevention mechanism 14. The yoke 28 includes a magnetic circuit unit for the X coil 23 and Y coils 24a and 24b (drive unit).

  The imaging wafer 12 is made of aluminum die casting. The imaging device 12 fixes the imaging device 11 within the inner frame. An imaging board 13 is fixed to the back side of the imaging wafer 12. Further, in the imaging wafer 12, a magnet 16 and three stainless steel plates 17a to 17c having a thickness of 0.1 mm are fixed in a recess provided on the back side. The imaging board 13 is connected to the imaging device 11 and is connected to a main board of the external camera 100 (not shown). As a result, the image sensor 11 is connected to the main board of the camera 100. In addition, the imaging unit 12 includes a convex portion 20 that protrudes in the Y-direction.

  Pins (abutting portions) 15 a to 15 d are press-fitted and fixed to the image pickup case 12 so as to protrude to the front side at locations that are approximately four corners of the image pickup case 12. These four pins 15a to 15d may be provided integrally with the image pickup case 12 by die casting if the strength is sufficient.

  The holder 18 is made of polyphenylene sulfide resin containing glass fiber. The holder 18 is formed in a substantially L shape, and is fixed to the lower part and the side part of the imaging wrap 12 by screws 19a to 19c. The holder 18 is bonded to the imaging wrap 12 at a portion in contact with the imaging wrap 12. Thereby, the holder 18 is reinforced. In particular, the holder 18 is supported by the convex portion 20 of the imaging wafer 12, and the rigidity of the holder 18 is enhanced by the convex portion 20. In addition, the stainless steel plates 21a to 21d having a thickness of about 0.1 mm are bonded to the holder 18, so that the rigidity of the holder 18 is also enhanced.

  The holder 18 is provided with a plurality of depressions on the front side, and Hall elements 22a to 22f are fixed to these depressions.

  Further, the holder 18 includes stainless steel plates 21a to 21d on the front side, an X coil 23 on the back side corresponding to the X + direction, and Y coils 24a and 24b on the back side corresponding to the Y− direction. Y coils 24a and 24b are mounted side by side in the X direction. The X coil 23 and the Y coils 24 a and 24 b are bonded to the holder 18. The holder 18 has a plurality of convex portions on the back surface side, and the convex portions are fitted into holes inside the X coil 23 and the Y coils 24a and 24b. That is, the X coil 23 and the Y coils 24a and 24b are positioned with respect to the holder 18 by the convex portions. The holder 18 is made of a synthetic resin having a high degree of freedom in order to facilitate the positioning of the Hall elements 22a to 22f, the X coil 23, and the Y coils 24a and 24b.

  The Hall elements 22a to 22f, the X coil 23, and the Y coils 24a and 24b are soldered to a flexible board that is affixed to the surface of the holder 18 (not shown). Connected to the board.

  The dust prevention mechanism 14 includes a glass plate, a piezoelectric element, and the like, and shakes off dust by vibrating the glass plate. The dust prevention mechanism 14 is attached to the front side of the image sensor 11.

  The yoke 28 is made of flat iron. The yoke 28 has a substantially rectangular shape and has a hole 28a near the center. The yoke 28 is around the hole 28a, and three brass ball receivers 27a to 27c and magnets 29, 30a, and 30b are fixed to the front side.

  The ball receivers 27a to 27c are provided at positions facing the stainless steel plates 17a to 17c of the imaging unit 12. The ball receivers 27a to 27c are formed in a cylindrical shape having an open front side, and stainless steel plates 26a to 26c having a thickness of 0.1 mm and support balls 25a to 25c (support portions) are disposed inside the cylinder. The ball receivers 27a to 27c have stainless steel plates 26a to 26c bonded to the bottom, and support balls 25a to 25c are supported by the stainless steel plates 26a to 26c.

  The support balls 25a to 25c are made of steel. The support balls 25a to 25c are in contact with the stainless steel plates 17a to 17c of the imaging unit 12 on the front side. In other words, the support balls 25 a to 25 c are provided between the stainless steel plates 26 a to 26 c of the yoke 28 and the stainless steel plates 17 a to 17 c of the imaging wax 12, and support the imaging wax 12 movably with respect to the yoke 28. . Wear can be reduced by supporting the imaging wafer 12 with the support balls 25a to 25c.

  The support balls 25a to 25c may be ceramic balls instead of steel balls. The support balls 25a to 25c can be made inexpensive by being made of steel. However, the control of the movable portion 4 may be difficult due to the influence of the magnets 29, 30a, and 30b. However, if the ball is made of ceramic, there is no influence of the magnets 29, 30a and 30b, and the movable part 4 can be easily controlled.

  When the movable part 4 is above the yoke 28 in the direction of gravity, the movable part 4 can be supported only by the support balls 25a to 25c. However, when the posture of the camera 100 is changed, the movable part 4 is separated from the support balls 25a to 25c in the Z direction and comes off. In the present embodiment, it is assumed that the attractive force generated by the magnetic force generated between the magnet 16 fixed to the imaging wafer 12 and the yoke 28, and between the stainless steel plates 21a to 21d and the magnets 30a and 30b works, and the posture of the camera 100 changes. However, the movable part 4 does not come off.

  The image sensor driving mechanism 2 includes magnets 29, 30a and 30b, an X coil 23, Y coils 24a and 24b, ball receivers 27a to 27c, support balls 25a to 25c, yokes 31 and 32, and the like. The The image sensor driving mechanism 2 drives the movable unit 4 around the X and Y directions and the Z axis.

  The magnet 29 is attached to the front side of the yoke 28 and closer to the X + direction than the hole 28a. The magnet 29 is provided at a position facing the X coil 23 attached to the holder 18. The magnet 29 is so-called differently poled with the front side in the X + direction being the S pole and the front side in the X− direction being the N pole, with the broken line in FIG. 4 as the boundary. The broken line portion is actually a neutral region having no magnetic pole of about 0.2 to 0.4 mm.

  The magnets 30a and 30b are provided on the lower side of the yoke 28, and are arranged side by side in the X direction. The magnet 30 a is provided at a position facing the Y coil 24 a attached to the holder 18. The magnet 30a is magnetized differently so that the front side in the Y + direction is an S pole and the front side in the Y− direction is an N pole. The magnet 30 b is provided at a position facing the Y coil 24 b attached to the holder 18. The magnet 30b is magnetized differently so that the front side in the Y + direction is an N pole and the front side in the Y− direction is an S pole.

  The yokes 31 and 32 are made of iron. The yoke 31 is provided so as to cover the magnet 29 and a part of the holder 18. The yoke 32 is provided so as to cover the magnets 30 a and 30 b and a part of the holder 18. The yokes 31 and 32 are bonded and fixed to the yoke 28.

  With the above configuration, the image sensor 11 can move around the X direction, the Y direction, and the Z axis with respect to the yoke 28.

  Next, the neutral holding mechanism 3 will be described with reference to FIGS. 7 and 8 are front views of the shake correction apparatus 1. 9 and 10 are exploded views showing a part of the neutral holding mechanism 3. FIG. 11 is a front view of a part of the neutral holding mechanism 3. 12 is a cross-sectional view taken along the line PP in FIG. 10 and 12, some parts such as the base 45 are omitted for the sake of explanation.

  The neutral holding mechanism 3 includes a base 45, a rotary blade 37, a coil 36, a yoke 33, a magnet 34, a yoke 35, springs 52a to 52d, holding portions (pressing portions) 55a to 55d, a lock spring ( Rotation prevention unit) 72.

  The base 45 is made of polyphenylene sulfide resin containing glass fiber. The base 45 has a substantially rectangular shape, and has a hole 68 at a substantially central portion as shown in FIG. FIG. 13 is an enlarged view of the vicinity of the center of the base 45. The hole 68 includes a curved portion 66, and linear portions (regulating portions) 67 a to 67 d that are connected to the curved portion 66 and are formed on the radially outer side of the curved portion 66. The straight line portion 67a is formed by a wall portion 63a substantially parallel to the Y axis and a wall portion 64a substantially parallel to the X axis. Similarly, the straight portions 67b to 67d are formed of wall portions 63b to 63d and wall portions 64b to 64d. Inside the hole 68, a part of the rotary wafer 37, the image sensor 11 and the like are arranged.

  In the present embodiment, the straight portions 67a to 67b are substantially parallel to the X axis or the Y axis. However, the present invention is not limited to this, and the details are so as to be outside the holding portions 55a to 55d described later. What is necessary is just to provide.

  The base 45 includes claw portions 46a to 46d protruding in the Z + direction. The nail | claw parts 46a-46d contact the surface of the front side of the rotation wax 37, and the outer peripheral surface of the rotation wax 37, and regulate the rotation wax 37 so that sliding is possible. Although not shown, the base 45 includes a protrusion that protrudes in the Z + direction. The convex portion is in contact with the back surface of the rotary drum 37, and the rotary drum 37 is supported by the base 45 in the Z-direction. Since the convex portion is in contact with the back surface of the rotary casing 37, the sliding resistance between the base 45 and the rotary casing 37 can be reduced.

  The rotary wax 37 is made of polyphenylene sulfide resin containing glass fiber. The rotary wax 37 is held by the base 45 so as to be rotatable around the optical axis (Z direction). The rotary wax 37 includes concave portions 80a to 80d on the inner peripheral side and escape portions 39a to 39d on the outer peripheral side.

  The recesses 80a to 80d are connected to each other by the first inner circumferences 43a to 43d, the first inner circumferences 43a to 43d, and the transition portions 42a to 42d, and are provided on the outer sides of the first inner circumferences 43a to 43d. Inner circumferences 41a to 41d.

  The escape portions 39a to 39d are used when the rotary blade 37 is attached to the base 45. When attaching the rotary brace 37 to the base 45, the claws 46a to 46d of the base 45 are aligned with the escape portions 39a to 39d, and the claws 46a to 46d are inserted into the escape portions 39a to 39d. Thereafter, the claw portions 46 a to 46 d are slidably contacted with the rotary bag 37 by rotating the rotary drum 37, and the rotary drum 37 is attached to the base 45.

  Further, the rotary waft 37 includes a stopper 44 protruding in the outer peripheral direction. The stopper 44 comes into contact with the stopper receivers 47 a and 47 d provided on the base 45, so that the rotation of the rotating back 37 is restricted in the Z direction. The stopper receiver 47b is a separate body from the base 45, and after the rotating brace 37 is attached to the base 45 as described above, it is fitted into the base 45 and bonded thereto. As a result, even if the rotary blade 37 is rotated after being attached to the base 45, the positions of the claw portions 46a to 46d and the escape portions 39a to 39d are not aligned, and the rotary blade 37 is detached from the base 45. To prevent.

  Further, the rotary blade 37 includes a convex portion 38 that protrudes toward the back surface and has a substantially L-shaped cross section. The convex portion 38 is bent and protrudes so as to bend outward. A coil 36 is bonded to the back side of the surface parallel to the XY plane of the convex portion 38. The convex portion 38 is provided with a convex portion that fits into the inner circumference of the hole of the coil 36, and the convex portion fits into the inner circumference of the coil 36 to determine the position of the coil 36.

  The coil 36 is provided on the back surface of the convex portion 38 of the rotary casing 37. As shown in FIG. 11, the sides at both ends in the circumferential direction of the coil 36 are on a line passing through the center of rotation of the rotary casing 37, and both ends are non-parallel sides.

  The yoke 33 is made of iron. The yoke 33 is the same surface as the surface on which the magnet 29 is provided, and is provided on the opposite side of the hole 28a of the yoke 28 from the location on which the magnet 29 is provided in the X direction. A magnet 34 is attached to the front side of the yoke 33. Note that the yoke 28 may be protruded in the Z + direction by pressing or the like without providing the yoke 33.

  The magnet 34 is provided on the yoke 33 and is provided so as to face the coil 36. The magnet 34 is thinner than the magnets 29, 30a, and 30b. The position of the magnet 34 in the Z direction is adjusted by the protrusion amount (height) of the yoke 33 in the Z + direction. The magnet 34 is magnetized differently so that the front side in the Y + direction is an N pole and the front side in the Y− direction is an S pole. In FIG. 10, the boundary between the magnetic poles is indicated by a broken line, but in actuality, it is a neutral region having no magnetic pole of about 0.2 mm to 0.4 mm.

  The yoke 35 is made of iron. The yoke 35 is attached to the yoke 33 so as to cover the yoke 33, the magnet 34, the coil 36, and the convex portion 38 of the rotary blade 37.

  The yoke 35 is screwed into the screw hole 51b of the yoke 31 so that the base 45 holding the rotary casing 37 is fixed to the image sensor driving mechanism 2, and then the base 45 and the rotary casing 37 from the X-direction. Between the convex portion 38 and the convex portion 38. After the yoke 35 is inserted between the base 45 and the convex portion 38 of the rotary casing 37, the yoke 35 is bonded to the yoke 33, and the screw 50a is screwed into the screw hole 51a of the yoke 35, whereby the image sensor driving mechanism. 2, the base 45 is firmly fixed.

  Positioning of the base 45 and the image sensor driving mechanism 2 is performed by engaging pins 85a and 85b provided in the yoke 28 and holes 86a and 86b provided in the base 45.

  The springs 52a to 52d will be described using the spring 52a.

  The spring 52a is made of phosphor bronze. The spring 52a is fixed to a convex portion 48a provided on the base 45 and projecting to the front side via a bent portion (second elastic portion) 53a and further adhered thereto. On the spring 52a, a convex portion 54a and a holding portion 55a, which are synthetic resins, are formed by Outert molding.

  The spring 52a is not limited to phosphor bronze and may be beryllium copper or stainless steel. Moreover, although the convex part 54a etc. were formed with the synthetic resin, the part which has these functions by bending a spring may be made with a metal spring itself. Cost reduction can be achieved by eliminating outsert molding. Moreover, you may integrally form the convex part 54a etc. and the part of the spring 52a with synthetic resins, such as a polyester elastomer. By devising the thickness and shape, the molded product can have elasticity. By manufacturing with synthetic resin, the price can be reduced.

  One end of the spring 52a is fixed so as to sandwich the convex portion 48a, and the other end is fixed to the holding portion 55a. The direction of the spring 52a is changed by the bent portion 53a in the vicinity of the convex portion 48a. The spring 52a whose direction has been changed is provided along the first inner circumference 43a or the second inner circumference 41a of the recess 80a of the rotary drum 37. And the direction of the spring 52a is changed by the bending part (1st elastic part) 56a, and the holding | maintenance part 55a is formed in the front-end | tip part. That is, the spring 52a generates an elastic force by the bent portions 53a and 56a.

  The convex part 54a formed in the place provided along the 1st inner periphery 43a or the 2nd inner periphery 41a is the 1st inner periphery 43a or 2nd by the elastic force which generate | occur | produces by the bending part 53a. The inner periphery 41a of the inner surface 41a is abutted against and the rotary blade 37 is pressed.

  Further, when the convex portion 54a abuts on the first inner periphery 43a, the convex portion 54a is located on the inner side and the holding portion 55a is also on the inner side compared to the case where the convex portion 54a abuts on the second inner periphery 41a. To position. In this case, the holding portion 55a abuts on the pin 15a, the holding portion 55a presses the pin 15a, and the convex portion 54a further presses the rotating brace 37 by the elastic force generated by the bending portion 56a.

  That is, as will be described later, the spring 52a moves a rotary member 37 between a spring (bending portion) 56a for elastically holding the movable portion 4 and a holding portion set of the movable portion 4 including the spring 56a and the holding portion 55a. And a spring (bending portion) 53a for supporting the movement so as to be movable.

  Note that the bent portion 53a may be slid or rotated by sliding instead of a spring, and the bent portion 53a may be supported so as to move in accordance with the movement of the rotary waft 37.

  The springs 52b to 52d have the same configuration as the spring 52a.

  The holding portion 55a includes a wall portion 70a substantially parallel to the X axis and a wall portion 71a substantially parallel to the Y axis at locations facing the pins 15a. The wall portion 70a is in the Y + direction from the wall portion 64a of the base 45, and the wall portion 70b is in the X + direction from the wall portion 63a of the base 45.

  The walls 70a and 71a are not limited to a shape that is substantially parallel to the X-axis or the Y-axis, and may be any shape that is positioned on the inner side of the walls 63a and 64a of the base 45.

  The holding parts 55b to 55d have the same configuration as the holding part 55a.

  When the holding portions 55a to 55d are in contact with the holding portions 55a to 55d and the pins 15a to 15d as shown in FIG. 8, the YZ plane 65a and the ZX plane 65b perpendicular to the optical axis are orthogonal to each other. Placed in position.

  The lock spring 72 is fixed to a convex portion 49 provided on the base 45. The distal end 72b of the lock spring 72 enters the holes 40a and 40b provided in the rotary casing 37, thereby preventing the rotary casing 37 from rotating. As a result, the rotary casing 37 can be fixed without energizing the coil 36, and power consumption can be reduced.

  With the above-described configuration, the rotary unit 37 can be rotated to move the holding units 55a to 55d, and the movable unit 4 can be switched between the holding state and the released state by the holding units 55a to 55d.

  In the present embodiment, the rotary drum 37 is rotated by the drive mechanism including the coil 36 and the magnet 34, but may be driven by a stepping motor or the like. In this case, it is only necessary to provide a gear portion on the drive shaft and the rotary shaft of the motor so as to engage with each other.

  Next, the operation of this embodiment will be described.

  First, the position detection of the movable part 4 will be described.

  The amount of movement when the movable unit 4 is moved in the X direction and the Y direction is determined by measuring the amount of camera shake with a gyro. The movement of the movable part 4 is precisely performed based on the position information of the movable part 4 detected by the Hall elements 22a to 22f.

  Here, the position detection in the X direction will be described as an example.

  The Hall element 22e is arranged in a range covered by the magnetic flux generated by the first part 62a of the magnet 29, and the Hall element 22f is arranged in a range covered by the magnetic flux generated by the second part 62b of the magnet 29.

  The Hall elements 22e and 22f have the drive voltage relationship reversed and the direction of the magnetic field is reversed, but the extracted voltage is positive. The difference (A−B) and sum (A + B) between the signals A and B obtained from the hall elements 22e and 22f are calculated, and the difference is divided by the sum (A−B) / (A + B). And the position of the X direction of the movable part 4 is detectable.

  The Y direction is detected in the same manner as the X direction by position detection by the Hall elements 22a and 22b and position detection by the Hall elements 22c and 22d whose positions are different in the X direction. The Hall elements 22a to 22d can detect the position at two locations, and the position of the movable portion 4 around the optical axis can be detected based on the difference between the two locations.

  Next, the moving method of the movable part 4 will be described with reference to FIGS. 6 and 14 as an example in which the movable part 4 moves in the X direction. FIG. 14 is a diagram illustrating a state in which magnetic flux is generated in the X coil 23.

  The movable part 4 moves in the X direction by energizing the X coil 23. The magnetic flux generated by the X coil 23 is output from the first portion 62a of the magnet 29 toward the opposing yoke 31 across the side 58a of the X coil 23 as indicated by an arrow 60a in FIG. The magnetic flux that has reached the yoke 31 travels through the inside of the yoke 31 as indicated by an arrow 61a, and toward the second portion 62b of the magnet 29 that faces the side 58b of the X coil 23 as indicated by an arrow 60b. Further, the magnetic flux advances from the second part 62b of the magnet 29 through the inside of the yoke 28 as indicated by an arrow 61b and returns to the first part 62a of the magnet 29.

  The direction of the current flowing through the sides 58a and 58b of the X coil 23 is opposite and the direction of the magnetic flux is also reversed, so that the force in the X direction generated in the movable portion 4 is the same in the X direction.

  A force in the Y direction is generated on the remaining sides 59 a and 59 b of the X coil 23. However, since the direction of the force received from the magnetic fields indicated by the arrows 60a and 60b is reversed and cancels, the movable portion 4 does not move in the Y direction by the X coil 23.

  As described above, by causing a current to flow through the X coil 23, the movable unit 4 and the image sensor 11 can be moved in the X direction.

  As for the Y coils 24a and 24b, the direction of the side generating the force is changed by 90 degrees compared to the X coil 23 so that the force in the Y direction is generated. Therefore, the basic mechanism for moving the movable unit 4 and the image sensor 11 in the Y direction is the same as that of the X coil 23. Magnet 30a and magnet 30b are opposite magnetic poles, that is, magnetic poles changed by 180 degrees.

  The Y coil 24a and the Y coil 24b are not connected and are controlled independently. Since the movable part 4 is supported by the support balls 25a to 25c, it can rotate not only in the X direction and the Y direction but also in the Z direction. In this case, a difference is provided in the force generated by the Y coils 24a and 24b.

  As described above, the movable portion 4 and the image sensor 11 can be moved in the Y direction by passing a current through the Y coils 24a and 24b and by the sum of the forces generated by the Y coils 24a and 24b. Further, it is possible to control the movable unit 4 and the image sensor 11 so as not to rotate around the Z direction by the difference in force generated by the Y coils 24a and 24b.

  Note that the center in the Y direction of the X coil 23 serving as a driving point when moving in the X direction and the intermediate point in the X direction between the Y coils 24a and 24b serving as driving points when moving in the Y direction are imaged. It is not the center of the element 11 but coincides with the center of gravity of the movable part 4. In the Y direction, since there are Y coils 24 a and 24 b, the center of gravity is shifted in the Y− direction from the center of the image sensor 11. Therefore, the X coil 23 is fixed while being shifted from the center of the image sensor 11 in the Y-direction. Similarly, since there is an X coil 23 in the X direction, the center of gravity is shifted in the X + direction from the center of the image sensor 11. Therefore, the intermediate point between the Y coil 24 a and the Y coil 24 b is fixed while being shifted in the X + direction from the center of the image sensor 11.

  Next, a method for moving the movable part 4 will be described first. First, a method for moving the movable part 4 without rotating the rotary horn 37 will be described.

  In general, the rotary brace 37 of the neutral holding mechanism 3 is in the position shown in FIG. 8, that is, the position (first position) where the stopper 44 of the rotary brace 37 has moved until it hits the stopper receiver 47 b of the base 45. At this time, the distal end 72b of the lock spring 72 enters the hole 40b of the rotary casing 37, and the rotary casing 37 is locked so as not to rotate. With this lock, the rotary casing 37 can be fixed without continuing to pass a current through the coil 36 for driving the rotary casing 37.

  In this case, as shown in FIG. 8, the convex portions 54 a to 54 d of the springs 52 a to 52 d are pushed by the first inner circumferences 43 a to 43 d of the rotary blade 37. This pressing force is transmitted to the holding portions 55a to 55d via the bent portions 56a to 56d of the springs 52a to 52d. Therefore, a force toward the substantially central direction acts on the holding portions 55a to 55d, and the holding portions 55a to 55d come into contact with the pins 15a to 15d. Thereby, the movable part 4 is restrained in the XY directions, and the image pickup device 11 mounted on the movable part 4 is held substantially at the center.

  The restraint is pushed by the elasticity of the bent portions 56a to 56d of the springs 52a to 52d. In this state, the movable part 4 is elastically held at a basic resonance frequency of 80 Hz. Due to this elasticity, a gap is generated between the holding portions 55a to 55d and the pins 15a to 15d, and the play does not occur. The holding portions 55a to 55d do not hit the pins 15a to 15d during operation and are not deformed.

  When correcting an image blur by moving the image sensor at the time of image capturing by a camera, in a normal apparatus, first, the constraint of the movable part is removed so that the movable part can move freely. Next, the amount of camera shake is measured by a gyro mounted on the camera, and based on this, the movable part is moved in the X and Y directions to reduce the camera shake.

  In this embodiment, in order to release the restraint of the movable part 4 and release the movable part 4, the rotating blade 37 is rotated. However, when correcting the blur, the measured camera without moving the rotating blade 37. Based on the blur amount of 100, the movable part 4 is moved in the X direction and the Y direction. At the same time, the rotating waft 37 is rotated to perform the operation of releasing the restraint of the movable portion 4.

  In this embodiment, since the movable part 4 is elastically held by the holding parts 55a to 55d, the springs 52a to 52d, etc., the movable part 4 moves within a small range without releasing the restriction of the movable part 4. Is possible. Therefore, for a small range of blur, the blur can be corrected without removing the constraint of the movable part 4. As a result, it is possible to perform shake correction quickly.

  When correcting the blur by releasing the restraint of the movable part, the amount of movement of the movable part at the start of the movement of the movable part is small, so the blur cannot be corrected quickly. However, in the present embodiment, the movable part 4 can be moved without moving the rotary casing 37 so that the movable part 4 can move over the entire movable range. As a result, it is possible to perform shake correction quickly.

  Next, a method for moving the movable part 4 by rotating the rotary drum 37 to release the restraint of the movable part 4 will be described.

  By passing an electric current through the coil 36, the rotary blade 37 is changed from the position of FIG. 8 to the position of FIG. 7, that is, the position where the stopper 44 of the rotary wafer 37 hits the stopper receiver 47 a of the base 45 (second position). The magnet 34 for applying a magnetic field to the coil 36 is magnetized with a different polarity. The magnet 34 receives forces on the sides 57a and 57b of the coil 36 in the XY plane direction in a direction perpendicular to each side, and the rotating wax 37 rotates. To do.

  When a current flows through the coil 36, the force generated by the coil 36 overcomes the pressing force from the side surface by the lock spring 72. Therefore, the rotary blade 37 moves until the stopper 44 hits the stopper receiver 47a of the base 45. Then, the leading end 72b of the lock spring 72 enters the hole 40a of the rotary casing 37, and the rotary casing 37 is locked so as not to rotate. When the rotary casing 37 is locked, the position of the rotary casing 37 is fixed without passing an electric current through the coil 36. The current of the coil 36 is supplied for a time that is added to the time required for the movement of the rotary drum 37, and then the current is controlled to zero. In addition, when the rotary casing 37 is moved from the state shown in FIG. 7 to the state shown in FIG.

  When the rotary drum 37 is rotated to the position shown in FIG. 7, the convex portions 54a to 54d of the springs 52a to 52d pass from the first inner circumferences 43a to 43d of the rotary wax 37 through the transition parts 42a to 42d and the second It comes into contact with the inner circumferences 41a to 41d. Since the second inner peripheries 41a to 41d are located outside the first inner peripheries 43a to 43d, the force for pressing the holding portions 55a to 55d by the springs 52a to 52d against the pins 15a to 15d of the movable portion 4 is small. Become. And the holding | maintenance parts 55a-55d leave | separate from the pins 15a-15d. The movable portion 4 can move by the gap generated thereby. The gap here is set so that the movable part 4 can move over the entire range.

  Further, the springs 52a to 52d have a role of absorbing an impact when the movable portion 4 moves to the end due to an external impact. When the movable part 4 moves to the end, the pins 15a to 15d hit the holding parts 55a to 55d, so that external impacts are absorbed by the springs 52a to 52d, and damage to the movable part 4 can be prevented.

  The positional relationship between the pins 15a to 15d and the base 45 is as shown in FIG. 13, and when the movable part 4 is released and the movable part 4 moves, any of the wall parts 63a to 63d and 64a to 64d of the base 45 is moved. Will hit the pins 15a to 15d. The wall parts 63a to 63d are stoppers in the X direction. When the movable part 4 moves in the X + direction, the pins 15b, 15c and the wall parts 63b, 63c hit, and when the movable part 4 moves in the X- direction, the pins 15a, 15d and the wall part 63a, 63d wins. This restricts the movement of the movable portion 4 in the X direction. The walls 64a to 64d are stoppers in the Y direction, and the operation is the same as that in the X direction although the direction is changed.

  FIG. 15 shows the vicinity of the pin 15a in detail. Even when the restraint of the movable portion 4 is released, the holding portion 55a is separated from the pin 15a, and the movable portion 4 is movable, the wall portions 70a and 71a of the holding portion 55a are inside the wall portions 63a and 64a. Therefore, for example, when the movable part 4 moves in the X-direction, the pin 15a hits the holding part 55a before hitting the wall part 63a. When the movable part 4 moves due to an external impact, the pin 15a does not directly contact the wall part 63a but contacts the wall part 71a after hitting the wall part 71a of the holding part 55a. Therefore, the impact can be absorbed by the spring 52a attached to the holding portion 55a. When the movable part 4 is moved to the end in the X-direction in order to correct the blur, it is possible to move while bending the spring 52a against the elasticity of the spring 52a. Therefore, the moving range of the movable part 4 is not affected.

  In this embodiment, the movable part 4 is elastically held at a basic resonance frequency of 80 Hz. In normal photographing, the optical axis is horizontal to the ground, and the image sensor 11 is perpendicular to the ground. As long as the Z direction is not perpendicular to the ground, the movable part 4 with the image sensor 11 exerts a force so that gravity moves toward the ground. Since the movable part 4 is elastically held, in a normal photographing posture, the movable part 4 falls to the ground side from the original position due to gravity. The amount of movement is determined by the elastic spring constant, and the basic resonance frequency is also determined by the spring constant. Therefore, if the basic resonance frequency is determined, the amount of movement is also determined.

  When the image sensor 11 is perpendicular to the ground and the basic resonance frequency is 80 Hz, the movable part 4 is lowered by 0.04 mm. When the fundamental resonance frequency is low, the amount of movement increases. If the amount of movement is large, the effect of holding the movable part 4 will be lost, so this amount of movement is preferably 0.1 mm or less. When the movement amount is 0.1 mm, the basic resonance frequency is 50 Hz. Therefore, when the basic resonance frequency is 50 Hz or more, the effect of holding the movable part is high and a high-performance device can be obtained.

As already described, when the movable part 4 starts to move, it remains in an elastically held state. At this time, it is necessary to overcome the elasticity and move, but if the fundamental resonance frequency is high, a large force is required at this time. The relationship between the current flowing through the X coil 23 and the Y coils 24a and 24b that move the movable part 4 and the obtained acceleration is called acceleration sensitivity. Generally, in an apparatus like this embodiment, 100 to 200 (m / s ² ). / A. When driven at a frequency lower than the fundamental resonance frequency, the amount of movement is determined in proportion to the current due to the influence of elastic force. This is called displacement sensitivity. When the acceleration sensitivity is 100 to 200 (m / s ² ) / A and the basic resonance frequency is 80 Hz, the displacement sensitivity is 0.4 to 0.8 mm / A. The maximum current that can be passed through the coil is about 200 mA in consideration of power consumption. In a state where the restraint of the movable part 4 is not released, the movable part 4 can move by 80 to 160 μm.

  Actually, since the restraint of the movable part 4 is released at the same time when the movable part 4 is moved, it is sufficient to move the level exceeding 10 μm. The displacement sensitivity enabling movement of 20 to 40 μm exceeding 10 μm is 0.1 to 0.2 mm / A, and the basic resonance frequency at this time is 160 Hz. When the frequency is set to 160 Hz or less, a high-performance device with a small current value at the start of movement can be obtained.

  The effect of 1st Embodiment of this invention is demonstrated.

  When the movable part 4 that holds the image sensor 11 and performs blur correction is held near the center of the optical axis, the movable part 4 is moved by the holding parts 55a to 55d by the elastic force of the springs 52a to 52d from the direction perpendicular to the optical axis. Hold. Since the movable part 4 is elastically held by the holding parts 55a to 55d, the movable part 4 can be moved without rotating the rotary waft 37 and releasing the lock by the lock spring 72. Therefore, when performing blur correction, it is possible to eliminate dead time until the lock is released and to perform blur correction quickly. Further, in order to reduce the dead time, it is not necessary to increase the size of the movable portion 4, the small movable portion 4 can be used, and the camera 100 can be reduced in size.

  Further, when the movable part is not elastically held, for example, there is a slight gap between the pins 15a to 15d of the movable part 4 and the holding parts 55a to 55d due to tolerances even when the movable part is held. It is necessary to provide a gap. When the camera vibrates, this gap may cause the movable part to vibrate and generate a sound. In this embodiment, the movable part 4 is elastically held to prevent the generation of such a sound. Can do.

  The wall portions 70a to 70d and 71a to 71d of the holding portions 55a to 55d facing the pins 15a to 15d are arranged so as to be inside the wall portions 63a to 63d and 64a to 64d of the base 45. As a result, when the movable part 4 is released and the movable part 4 moves, the pins 15a to 15d are first inserted into the walls 70a to 70d and 71a to 71d of the holding parts 55a to 55d supported by the springs 52a to 52d. Abut against either. Then, after the impact is absorbed by any one of the springs 52a to 52d, it comes into contact with any of the wall portions 63a to 63d and 64a to 64d of the base 45. Therefore, the impact at the time of contact between the pins 15a to 15d and the base 45 can be reduced without separately using an impact absorbing material or the like. Thereby, damage to the movable part 4 can be prevented.

  First inner circumferences 43 a to 43 d and second inner circumferences 41 a to 41 d provided outside the first inner circumferences 43 a to 43 d are provided on the inner circumference of the rotary drum 37. By rotating the rotary drum 37, the projections 54a to 54d provided on the springs 52a to 52d and the first inner circumferences 43a to 43d or the second inner circumferences 41a to 41d come into contact with each other. Then, the holding and releasing states of the movable part 4 by the holding parts 55a to 55d are switched. Therefore, the thickness in the optical axis direction can be reduced.

  The holding portions 55a to 55d are provided so as to be plane-symmetric with respect to the YZ plane 65a and the ZX plane 65b perpendicular to the optical axis. As a result, the direction of the pressing force applied to the pins 15a to 15d by the holding portions 55a to 55d becomes symmetrical and balanced, so that the movable portion 4 rotates around the Z axis when pressed by the holding portions 55a to 55d. Can be prevented. Further, it is possible to prevent the image pickup device 11 from being held out of position and to obtain a high-performance camera 100 blur device.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  The second embodiment will be described with respect to differences from the first embodiment. In the second embodiment, the neutral holding mechanism is different. FIG. 16 is a schematic diagram illustrating the arrangement of the springs 120a to 120d of the neutral holding mechanism.

  The neutral holding mechanism is arranged so that the convex portions 121a to 121d of the base 45 and the springs 120a to 120d are plane-symmetric with respect to the YZ plane 65a and the ZX plane 65b. Since other configurations are the same as those in the first embodiment, description thereof is omitted here. In addition, about the thing of the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected.

  When the springs provided with the holding portions 55a to 55d are arranged so as to be rotationally symmetric, the holding portions 55a to 55d move with the bending amount of the bending portions 53a to 53d changing when the rotary waft 37 is rotated. . At this time, the holding portions 55a to 55d move so as to draw a circle by rotating around convex portions (fixed portions) 48a to 48d provided on the base 45 via the bent portions 53a to 53d. When the holding portions 55a to 55d move so as to draw a circle, a force that rotates around the Z axis may be transmitted to the movable portion 4 to the pins 15a to 15d.

  By making the springs 120a to 120d plane-symmetric, the movement directions of the holding sections 55a to 55d are also plane symmetrical when the holding sections 55a to 55d are moved. Therefore, during the movement, the change in the orientation of the holding portions 55a to 55d is also plane symmetric, so that the balance of the movement of the holding portions 55a to 55d accompanying the rotation of the rotary back 37 is maintained and the rotation of the movable portion 4 is prevented. Can do.

  The effect of 2nd Embodiment of this invention is demonstrated.

By making the springs 120a to 120d symmetrical with respect to the YZ plane 65a and the ZX plane 65b, the rotation of the movable section 4 can be prevented when the holding sections 55a to 55d are moved.
Next, a third embodiment of the present invention will be described with reference to FIG.

  In the third embodiment, parts different from the first embodiment will be described. In the third embodiment, the neutral holding mechanism is different. FIG. 17 is a schematic diagram illustrating the springs 122a to 122d of the neutral holding mechanism. FIG. 17A is a side view of the spring 122a, and FIG. 17B is a front view of the spring 122a. In the third embodiment, only the spring 122a is shown and described, but the springs 122a to 122d are arranged in plane symmetry with respect to the YZ plane and the ZX plane as in the second embodiment.

  The neutral holding mechanism is arranged so that the springs 122a to 122d extend in the Z direction. Since other configurations are the same as those in the first embodiment, description thereof is omitted here. In addition, about the thing of the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected.

  One end of the spring 122a is connected to the convex portion 123a of the base 45, the direction is changed in the Z + direction by the bent portion 124a, and the spring 122a extends in the Z + direction. Then, the direction is changed in the Z-direction by the bent portion 125a, and the other end portion is connected to the holding portion 55a. Further, the spring 122 a includes a convex portion 126 a in the middle thereof, and the convex portion 126 a abuts on the inner periphery of the rotary casing 37.

  The springs 122a to 122d are arranged in plane symmetry with respect to the YZ plane and the ZX plane. For this reason, the springs 122a to 122d are bent so that the holding parts 55a to 55d are inclined from the Z axis when the rotary drum 37 rotates, but a force that rotates around the Z axis is transmitted to the movable part 4. There is nothing. Therefore, a balance is achieved even in the process of movement of the holding portions 55a to 55d accompanying the rotation of the rotary drum 37, and the rotation of the movable portion 4 can be prevented.

  The effect of the third embodiment of the present invention will be described.

  By making the springs 122a to 122d symmetrical with respect to the YZ plane and the ZX plane, the rotation of the movable portion 4 can be prevented when the holding portions 55a to 55d are moved.

  Next, a fourth embodiment of the present invention will be described.

  In the fourth embodiment, parts different from the first and third embodiments will be described. In the fourth embodiment, the neutral holding mechanism is different. FIG. 18 is a cross-sectional view showing a part of the neutral holding mechanism. In the fourth embodiment, the springs 130a and 130c are displayed and described. However, the springs 130a to 130d are arranged symmetrically with respect to the YZ plane and the ZX plane as in the second embodiment.

  In the fourth embodiment, as in the third embodiment, the springs 130a to 130d are arranged so as to extend in the Z direction. In the first embodiment, the convex portions 54a to 54d are pushed and the holding portions 55a to 55d are moved by the rotary blade 37 that rotates around an axis parallel to the optical axis. It is moved by a slide 137 that moves in the axial direction. Since other configurations are the same as those in the first and third embodiments, description thereof is omitted here. In addition, about the thing of the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected.

  The spring 130a will be described. The spring 130a extends in the Z direction perpendicular to the XY plane, is provided with bent portions 131a, 132a, and 133a, and is fixed to the convex portion 135a of the base 45 at one end. A holding portion 55a is fixed to the other end. Moreover, the convex part 136a is attached in the middle. Although the bending parts 131a and 132a are divided into two places, they play the same role as the one bending part 124a in FIG. 17 of the third embodiment. The springs 130b to 130d have the same configuration.

  Although not shown, the slide wax 137 is supported so as to be movable in the optical axis direction. The slide wax 137 is arranged so as to surround a lens frame that holds a lens for photographing. Further, it is translated in the direction of the optical axis as shown by an arrow 138 by a driving mechanism using magnetic force including a coil, a magnet, a yoke, etc. (not shown).

  The convex portions 136 a to 136 d are shaped to fit into grooves (movement preventing portions) 139 a to 139 d provided on the inner side of the slide work 137. When in this position (second position), the holding portions 55a to 55d do not press the pin 15a of the movable portion 4, and the movable portion 4 is released and can move freely.

  Here, when the slide wax 137 is moved in the Z-direction, the convex portions 136a to 136d are pushed inward by the inclined surfaces 140a to 140d provided inside. When the slide wax 137 is further moved, the convex portions 136a to 136d fit into the grooves (movement preventing portions) 141a to 141d. When in this position (first position), the holding portions 55a to 55d press the pins 15a to 15d of the movable portion 4, and hold the movable portion 4 with the elasticity of the bent portions 133a to 133d of the springs 130a to 130d.

  The effect of 4th Embodiment of this invention is demonstrated.

  In the fourth embodiment, the member that pushes and moves the convex portions 136a to 136d is a slide 137 that moves in the optical axis direction, so that it can be disposed along a lens frame that holds a lens that exists in the optical axis direction. Therefore, the entire apparatus can be reduced in size.

  Next, a fifth embodiment of the present invention will be described.

  About 5th Embodiment, a different part from 1st Embodiment is demonstrated. In the fifth embodiment, the neutral holding mechanism is different. FIG. 19 is a schematic view of the neutral holding mechanism of the fifth embodiment.

  In the fifth embodiment, the configurations of the springs 150a to 150d, the holding portions 151a to 151d, and the pins 152a to 152d are different from those of the first embodiment. Since other configurations are the same as those in the first embodiment, description thereof is omitted here. In addition, about the thing of the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected.

  The pins 152a to 152d are fixed such that silicone gels 153a to 153d formed into a hollow cylindrical pipe shape insert the cores 154a to 154d into the central hole.

  The holding parts 151a to 151d are provided so as to be in contact with the silicone gels 153a to 153d even when the movable part 4 is not held, and are fixed to the springs 150a to 150d. It is desirable that the holding portions 151a to 151d have a circular arc shape at locations facing the silicone gels 153a to 153d.

  When the movable part 4 is not held by the holding parts 151a to 151d so that the movable part 4 moves in the XY direction, the silicone gel 153a only touches the holding part 151a lightly as shown in FIG. From here, when the movable part 4 moves, the core 154a provided in the movable part 4 and the holding part 151a lightly compress the silicone gel 153a. At this time, the elastic force acts on the movable portion 4 due to the elasticity of the silicone gel 153a, but the distance between the core 154a and the holding portion 151a is large, and the elastic force acting from the silicone gel 153a is small.

  Due to the small elastic force acting, for example, when the camera 100 is held so that the Y direction becomes the gravity direction, the movable portion 4 does not move to the extreme end in the Y direction due to the gravity. When photographing, the movable part 4 is once moved to the center position. However, since this distance is short, the time lag after the shutter is released can be shortened, and a high-performance apparatus can be obtained. If it is desired to move to the end, it may be moved against the elasticity. Thereby, the impact when moving the movable part 4 to the end can also be suppressed.

  Furthermore, the viscosity of the silicone gels 153a to 153d also has an effect of damping small vibrations of the movable part 4, which suppresses minute vibrations during movement, and has a high-performance device with good servo performance that moves the movable part 4. can do.

  When the movable part 4 moves so that the distance between the core 154a and the holding part 151a approaches, the silicone gel 153a is compressed, and the elastic force increases. Further, when the core 154a moves along the holding portion 151a, the silicone gel 153a is deformed and an elastic force works.

  On the other hand, when the movable part 4 moves so that the distance between the core 154a and the holding part 151a is increased, the silicone gel 153a and the holding part 151a are separated from each other, and the elastic force does not work, but other pins 152b to 152d other than the pin 152a. Any one of these moves so that an elastic force acts between the cores 154b to 154d and the holding portions 151b to 151d.

  Note that the silicone gel 153a and the holding portion 151a may be attached with the viscosity of the silicone gel 153a. According to this, even when the core 154a moves in the direction away from the holding portion 151a, the tension of the silicone gel 153a works as a force in the direction in which the tension is restored.

  When holding the movable part 4, the rotary waft 37 is rotated, and the holding part 151 a is moved as shown by an arrow 155 as shown in FIG. As a result, the core 154a is pushed by the silicone gel 153a and tries to move as indicated by the arrow 155. However, since the core 154c opposite to the core 154a is pushed by the holding portion 151c in the direction opposite to the arrow 155, the movable portion 4 does not move and the silicone gel 153a is deformed and compressed. This occurs with all of the silicone gels 153a-153d. Due to the deformation and compression of the silicone gels 153a to 153d, the elasticity is increased (the spring constant is increased), and the movable portion 4 is elastically held. The fundamental resonance frequency of the system that holds the movable part 4 is higher than before the holding parts 151a to 151d are moved.

  The holding portions 151a to 151d are fixed to the springs 150a to 150d, but the springs 150a to 150d do not have the bending portions 56a to 56d of the first embodiment, and the holding portions 151a to 151d can be moved by the bending portions 53a to 53d. I just support it. The elasticity when elastically holding the movable part 4 is not that of the springs 150a to 150d, but the elasticity of the silicone gels 153a to 153d.

  In the fifth embodiment, the silicone gels 153a to 153d are used, but rubber may be used.

  Moreover, you may comprise holding | maintenance part 151a-151d with a silicone gel or rubber | gum.

  The effect of 5th Embodiment of this invention is demonstrated.

  In the fifth embodiment, by elastically holding the silicone gels 153a to 153d, the configuration of the springs 150a to 150d can be simplified, and the cost of the apparatus can be reduced.

  It goes without saying that the present invention is not limited to the above-described embodiments, and includes various modifications and improvements that can be made within the scope of the technical idea. Further, the above embodiments can be appropriately combined.

  For example, the magnets are magnetized differently in the form of N poles and S poles arranged on one magnet, but two general magnets with single poles may be arranged side by side. Since the number of magnets is doubled, the assembly cost is high, but single pole magnetization is easier than different pole magnetization, and the magnetization cost may be lower.

  In this case, the two magnets may be arranged with a gap between them without being closely arranged. The magnetic field is zero in the middle part between the N and S poles, and the force generated by the coil becomes weaker as it approaches that part. Therefore, it is common to design the coil so that it does not move near the middle of the N and S poles. If the coil does not move to the middle 1.5 mm, even if the magnet is separated by about 0.5 to 0.6 mm, the obtained force does not change and the force generated in the coil Is no problem.

This time, the magnet is fixed with a coil on the movable part side, but this relationship may be reversed. The movable part has a structure that freely moves in the XY plane by a steel ball. However, the movable part may be supported by a shaft or the like, restricted so as to move only in the X direction and the Y direction, and may not be rotated.
Further, although the image pickup element is moved to perform shake correction, the shake correction may be performed by moving an optical element such as a lens.

It is a schematic perspective view of the digital single-lens reflex camera of a 1st embodiment. It is a perspective view of the blurring correction apparatus of 1st Embodiment. It is a perspective view of the image sensor drive mechanism of the first embodiment. It is an exploded view which shows a part of image pick-up element drive mechanism. It is an exploded view which shows a part of image pick-up element drive mechanism. It is the perspective view which looked at a part of image pick-up element drive mechanism from the back. It is a front view of the blurring correction apparatus of 1st Embodiment. It is a front view of the blurring correction apparatus of 1st Embodiment. It is an exploded view which shows a part of neutral holding mechanism of 1st Embodiment. It is an exploded view which shows a part of neutral holding mechanism of 1st Embodiment. It is a rear view front view of a part of the neutral holding mechanism. It is PP sectional drawing of FIG. It is an enlarged view of a part of base of a 1st embodiment. It is a figure for demonstrating the operation | movement in X coil of 1st Embodiment. It is an enlarged view of the pin vicinity of 1st Embodiment. It is a figure which shows a part of neutral holding mechanism of 2nd Embodiment of this invention. It is a figure which shows a part of neutral holding mechanism of 3rd Embodiment of this invention. It is sectional drawing of a part of neutral holding mechanism of 4th Embodiment of this invention. It is the schematic of a part of neutral holding mechanism of 5th Embodiment of this invention. It is an enlarged view of the holding | maintenance part of 5th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shake correction apparatus 2 Image sensor drive mechanism 3 Neutral holding mechanism (holder position holding mechanism)
4 Movable part 11 Image sensor 15a-15d Pin (contact part)
23 X coil (drive unit)
24a, b Y coil (drive unit)
25a-25c support ball (support part)
28 Yoke 37 Rotating work 48a-48d, 135a-135d Convex part (fixed part)
52a to 52d, 120a to 120d, 122a to 122d, 130a to 130d, 150a to 150d Spring 53a to 53d, 124a to 124d, 133a to 133d Bending portion (second elastic portion)
55a-55d, 151a-151d Holding part (pressing part)
56a-56d, 125a-125d, 131a-131d, 132a-132d Bending part (first elastic part)
67 Straight section (regulation section)
72 Lock spring (rotation prevention part)
137 Slide work 139a to 139d Groove (Movement prevention part)
141a-141d groove | channel (movement prevention part)

Claims (15)

An image sensor;
A holder for supporting the imaging element;
A support part for supporting the holder movably in a plane perpendicular to the optical axis;
A camera driving unit that drives the holder with respect to the support unit by electromagnetic force in a plane perpendicular to the optical axis, and that moves the image sensor to correct image shake due to camera shake. In the device
A holder position holding mechanism that elastically holds the holder so that the center of the image sensor substantially coincides with the optical axis by a pressing portion that presses the holder from a plurality of directions perpendicular to the optical axis;
The drive unit moves the holder in a plane perpendicular to the optical axis against the pressing of the pressing unit in a state where the holder position holding mechanism elastically holds the holder. Camera shake correction device.   2. The camera shake correction device according to claim 1, wherein the pressing portion presses the holder from a plurality of directions perpendicular to the optical axis by a first elastic portion. The holder position holding mechanism is
A rotating wax rotating around the optical axis;
The rotation prevention part which prevents rotation of the said rotation wrap in the 1st position which elastically holds the said holder, and the 2nd position which releases the said holder is provided to Claim 1 or 2 characterized by the above-mentioned. The camera shake correction apparatus described. The holder position holding mechanism is
A slide wax that moves in the direction of the optical axis;
The movement prevention part which prevents the movement to the said optical axis direction in the 1st position which elastically holds the said holder, and the 2nd position which releases the said holder is provided, or characterized by the above-mentioned. 2. The camera shake correction apparatus according to 2.   5. The camera according to claim 1, wherein the holder holding mechanism includes a second elastic portion that attaches the pressing portion to the fixed portion so as to be movable in a direction perpendicular to the optical axis. Blur correction device.   The camera shake correction apparatus according to claim 5, wherein the first elastic portion and the second elastic portion are formed of the same member.   The camera shake correction apparatus according to claim 1, wherein the pressing portion is provided symmetrically with respect to two surfaces that are parallel to and orthogonal to the optical axis.   The camera shake correction device according to claim 5, wherein the fixing portion and the second elastic portion are provided symmetrically with respect to two surfaces that are parallel to and orthogonal to the optical axis. An abutting portion that moves integrally with the holder and abuts against the pressing portion when the holder holding mechanism holds the holder;
When the holder is released and moves, the holder comes into contact with the contact portion, and includes a restricting portion that restricts the movement of the holder,
When the holder is released, the pressing portion is positioned closer to the contact portion than the restricting portion, and when the contact portion is in contact with the restricting portion, the contact portion is 9. The camera shake correction device according to claim 1, wherein after the contact with the pressing portion, the contact portion contacts the restriction portion. 10.   10. When the holder is held by the holder position holding mechanism, a fundamental resonance frequency composed of the holder and the holder position holding mechanism is 50 Hz to 160 Hz. Camera shake correction device.   The pressing portion is in contact with the abutting portion even when the holder is released, and when the holder is held, the holder and the holder position holding mechanism are used rather than when the holder is released. The camera shake correction device according to claim 9, wherein the fundamental resonance frequency becomes higher.   The camera shake correction device according to claim 2, wherein the first elastic portion is a metal spring.   The camera shake correction device according to claim 2, wherein the first elastic portion is a synthetic resin.   The camera shake correction apparatus according to claim 2, wherein the first elastic portion is rubber.   The camera shake correction device according to claim 2, wherein the first elastic portion is a silicone gel.

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