JP2000194027A - Image blurring correction mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely drive a correction lens by simple constitution. SOLUTION: A 1st and a 2nd actuators 110 and 120 are symmetrically positioned by interposing an optical axis OP. At the 1st actuator 110, a rod 112 whose end part abuts on a side surface 101A is moved forwards and backwards along an axis Y1 according to the rotation of a stepping motor 111. At the 2nd actuator 120, a rod 122 whose end part abuts on a side surface 102A is moved forwards and backwards along an axis Y2 according to the rotation of a stepping motor 121. Besides, a 3rd and a 4th actuators 130 and 140 are symmetrically positioned by interposing the optical axis OP. At the 3rd actuator 130, a rod 132 whose end part abuts on a side surface 103A is moved forwards and backwards along an axis X1 according to the rotation of a stepping motor 131. At the 4th actuator 140, a rod 142 whose end part abuts on a side surface 104A is moved forwards and backwards along an axis X2 according to the rotation of a stepping motor 141.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image blur correction mechanism for optical equipment.

[0002]

2. Description of the Related Art Conventionally, products equipped with a mechanism for correcting an optical image blur caused by a camera shake in an optical device such as a camera have been put to practical use. Such an image blur correction mechanism is
For example, one method is to drive the correction lens along two axes perpendicular to each other in a plane perpendicular to the optical axis so as to cancel the movement of the image due to the movement of the optical axis of another optical system of the optical apparatus. Is used to correct image blur.

[0003] The correction lens is driven as described above by forming a holding member for holding the correction lens in a double structure or separately providing a guide member for guiding a single holding member. The former holding member has a structure in which a frame member that can be driven in the horizontal direction and a frame member that can be driven in the vertical direction in a state where the optical device is normally supported are prepared, and one frame member is incorporated in the other frame member. have. Further, the latter holding member has a configuration in which guide members for guiding the single holding member along the vertical direction or the horizontal direction while the optical device is normally supported are separately provided.

[0004]

However, it is complicated to make the holding member of the correction lens a double structure, and in order to accurately drive the frame members to be incorporated, the size and shape of each frame member must be changed. High precision molding is required.
Further, when the guide member is provided, the guide member is required to have high-precision linearity along the horizontal direction or the vertical direction. That is, in any case, there is a problem that manufacturing is extremely difficult and a great deal of labor is required to realize smooth driving of the holding member.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an image blur correction mechanism having a simple structure and capable of accurately driving a correction lens.

[0006]

An image blur correction mechanism according to the present invention comprises: a correction optical system for correcting an image blur of an optical apparatus;
A first frame comprising a holding frame for holding the correction optical system, and first and second driving means for driving the holding frame along a first axis in a plane orthogonal to the optical axis of the correction optical system. A pair of drive mechanisms, and a second pair of drive mechanisms including a third drive unit and a fourth drive unit that drive the holding frame along a second axis orthogonal to the first axis in a plane. Prepared,
The first drive unit and the second drive unit, and the third drive unit and the fourth drive unit are respectively disposed with the optical axis of the correction optical system interposed therebetween.

Preferably, further, an angular velocity detecting means for detecting an angular velocity of a shake of an optical axis of a photographing optical system of the optical apparatus,
A shake angle calculation means for calculating a shake angle of the optical axis of the photographing optical system from the angular velocity, and first, second, third and fourth drive means for driving the correction optical system so that the shake angles are offset. Control means for calculating the amount, wherein the control means
The first pair of driving mechanisms includes a first driving unit and a second driving unit.
Are driven by the same amount, and the third driving unit and the fourth driving unit are driven by the same amount in the second pair of driving mechanisms.

Preferably, in the first pair of drive mechanisms, the first and second drive means are each formed of the same member, and in the second pair of drive mechanisms, the third and fourth drive means are provided. Are composed of the same members.

[0009] The first driving means and the second driving means are, for example, a first motor rotatable around an axis parallel to the first axis, respectively, and a first motor in response to rotation of the first motor. A first movable section movable along an axis, and the holding frame is moved in accordance with the movement of the first movable section of the first drive section and the first movable section of the second drive section. The third driving means and the fourth driving means are driven along the axis of the second motor, respectively, for example, a second motor rotatable around an axis parallel to the second axis, and a rotation of the second motor. A second movable part movable along the second axis in response to the movement of the second movable part of the third drive means and the second movable part of the fourth drive means. The holding frame is driven along a second axis.

In the first and second driving means, for example, the first motor is a stepping motor, and the first movable portion is a rod which supports the first motor and directly presses the holding frame. In the third and fourth driving means, for example, the second motor is a stepping motor, and the second movable portion is a rod that supports the second motor and directly presses the holding frame. .

In the first and second driving means, for example, the first motor is a DC motor, the first movable part is a feed screw for directly pressing the holding frame, and the first and second driving means are provided. The means further includes rotating the first motor in a first motor.
A first transmission means for converting the linear motion of the movable portion into a linear motion,
In the third and fourth driving units, for example, the second motor is a DC motor, the second movable unit is a feed screw that directly presses the holding frame, and the third and fourth driving units are
Further, there is provided second transmission means for converting the rotational motion of the second motor into the linear motion of the second movable part.

Preferably, the first, second, third and fourth driving means are each an electromagnetic coil having a coil and a permanent magnet, for example, the coil is fixed to a holding frame, and the permanent magnet is It is fixed inside.

[0013] Preferably, a first pair of position detecting mechanisms comprising first position detecting means and second position detecting means for detecting the position of the holding frame in a direction along the first axis, and a second pair of position detecting mechanisms. A second pair of position detection mechanisms including a third position detection unit and a fourth position detection unit for detecting a position of the holding frame in a direction along the axis of the first position detection unit and the second position detection unit. The position detecting means, and the third position detecting means and the fourth position detecting means are respectively disposed with the optical axis interposed therebetween.

Each of the first, second, third and fourth position detecting means is, for example, an encoder comprising a photo interrupter fixed inside the optical equipment and a code plate fixed to the end of the DC motor. .

Each of the first, second, third, and fourth position detecting means includes, for example, a light emitting element and a position detecting element for detecting the position of incident light, and the light emitting element and the position detecting element are engraved on a holding frame. It is arranged along the optical axis with the provided slit interposed.

Preferably, the ends of the first movable portions of the first drive means and the second drive means are always in contact with the holding frame, and the second movable means of the third drive means and the fourth drive means are movable. There is provided urging means for urging the holding frame so that the end of the portion always contacts the holding frame.

Preferably, a notch is formed in a part of the holding frame corresponding to the first, second, third and fourth driving means, and the first, second, third and third notches are formed. At least a part of each of the driving means 4 is disposed in the corresponding notch.

Preferably, the notch in which the first driving means is disposed and the notch in which the second driving means is disposed have a pressed surface orthogonal to the first axis. The first movable portion and the second movable portion abut against a pressed surface of the corresponding notch portion, which is orthogonal to the first axis, and the notch portion and the fourth drive in which the third driving means are provided. The notch in which the means is disposed has a pressed surface orthogonal to the second axis, and the third movable part and the fourth movable part are respectively orthogonal to the second axis of the corresponding notch. Abuts against the pressed surface.

Preferably, the holding frame restricts the movement of the holding frame along the optical axis of the correction optical system, and always keeps the optical axis of the correction optical system and the optical axis of another optical system of the optical device in parallel. Is provided.

Preferably, the supporting means is provided on the inner wall surface of the optical device, and a projecting member abutting on one plane of the holding frame orthogonal to the optical axis of the correction optical system, and orthogonal to the optical axis of the correction optical system. A pressing member that abuts a position corresponding to the protruding member on the other plane of the holding frame and is drivable along the optical axis of the correction optical system, and moves the pressing member toward the holding frame along the optical axis of the correction optical system. An urging member for urging is provided, and the holding frame is held between the protrusion and the pressing member by the urging force of the urging member.

Further, the image blur correcting mechanism according to the present invention comprises a correcting optical system for correcting image blur of an optical device, a holding frame for holding the correcting optical system, and a holding frame orthogonal to the optical axis of the correcting optical system. And a pair of driving units that are driven along the same axis in a plane, wherein the pair of driving units are arranged so that respective driving forces act on the holding frame with the optical axis interposed therebetween.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an image blur correction mechanism to which the first embodiment according to the present invention is applied, and shows a state in which an optical device on which the image blur correction mechanism is mounted is supported in a normal posture. . In this specification, "vertical direction"
Is a direction that coincides with the vertical direction when the optical device is supported in a normal posture, and the “lateral direction” is a direction that coincides with the horizontal direction when the optical device is supported in a normal posture.

Correction lens 1 for correcting image blur of optical equipment
0 is a correction lens frame 1 which is a single plate member having a substantially square shape.
00 is fixed at the center. First actuator 1
10 (first driving means) is positioned in a notch 101 formed at the left end of the correction lens frame 100 in FIG. 1, and includes a stepping motor 111 and a rod 11.
2 is a linear motion type actuator. The stepping motor 111 is fixed to the inner wall surface of the optical device (not shown), and is rotatable around an axis Y1 that coincides with the vertical direction when the optical device is supported in a normal posture. The rod 112 is supported so as to advance and retreat along the axis Y1 in accordance with the rotation of the stepping motor 111. The end of the rod 112 is in contact with a side surface 101A orthogonal to the axis Y1 among the side surfaces defining the cutout portion 101.

Similarly, the second actuator 120 (second driving means) is a direct-acting actuator composed of a stepping motor 121 and a rod 122, and is formed at the right end of the correction lens frame 100 in FIG. It is positioned in the notch 102. Stepping motor 1
Reference numeral 21 is fixed to the inner wall surface of the optical device (not shown), and is rotatable around an axis Y2 parallel to the axis Y1. The rod 122 moves along the axis Y2 according to the rotation of the stepping motor 121. Retreat. The end of the rod 122 is in contact with a side surface 102 </ b> A orthogonal to the axis Y <b> 2 among the side surfaces defining the notch 102.

As described above, the first actuator 110
Is positioned at the notch 101 at the left end of the correction lens frame 100, and the second actuator 120 is positioned at the notch 102 at the right end of the correction lens frame 100. That is, the first actuator 110 and the second actuator 120 are positioned symmetrically with respect to the optical axis OP of the correction lens 10.

The first actuator 110 and the second actuator 120 are each composed of the same member, that is, a linear motion actuator including a stepping motor and a rod.

In FIG. 1, a third actuator 130 (third driving means) is provided in a notch 103 formed at the upper end of the correction lens frame 100. The third actuator 130 includes a stepping motor 131 that is rotatable around an axis X1 coinciding with the horizontal direction when the optical device is supported in a normal posture, and a stepping motor 1.
Rod 1 that advances and retreats along axis X1 in accordance with the rotation of 31
32 is a linear motion type actuator. The stepping motor 131 includes stepping motors 111 and 121.
Similarly to the above, it is fixed to the inner wall surface of the optical device (not shown). The end of the rod 132 is in contact with the side surface 103A orthogonal to the axis X1 among the side surfaces defining the cutout portion 103.

In FIG. 1, a fourth actuator 140 (fourth driving means) is provided in a notch 104 formed at the lower end of the correction lens frame 100. The fourth actuator 140 is a direct-acting actuator including a stepping motor 141 rotatable around an axis X2 parallel to the axis X1, and a rod 142 that advances and retreats along the axis X2 in accordance with the rotation of the stepping motor 141. The stepping motor 141 is fixed to the inner wall surface of the optical device (not shown), like the stepping motors 111, 121, and 131. The end of the rod 142 is in contact with a side surface 104A orthogonal to the axis X2 among the side surfaces defining the cutout portion 104.

As described above, the third actuator 130
Is positioned in the notch 103 at the upper end of the correction lens frame 100, and the fourth actuator 140 is positioned in the notch 104 at the lower end of the correction lens frame 100. That is, the third actuator 130 and the fourth actuator 140 are positioned symmetrically with respect to the optical axis OP.

The third actuator 130 and the fourth actuator 140 are each composed of the same member, that is, a direct-acting actuator composed of a stepping motor and a rod.

Further, the outer shape of the correction lens frame 100 is a square plate-like member having four chamfered apexes, and the correction lens 10 is held so that the optical axis OP of the correction lens 10 penetrates the center thereof at right angles. Have been. Therefore, the correction lens 1
The center of gravity of the correction lens frame 100 including 0 is the correction lens frame 1
00, ie, substantially coincides with the optical axis OP. In other words, the first and second actuators 110, 120
Are positioned symmetrically along the horizontal direction with respect to the center of gravity, and the third and fourth actuators 130 and 140 are positioned symmetrically along the vertical direction with respect to the center of gravity.

That is, in the case of the square correction lens frame 100 shown in FIG. 1, the distance from the center of gravity to the surface 101A where the rod 112 is in contact and the distance from the center of gravity to the surface 102A where the rod 122 is in contact are They are set equal to each other. Similarly, the distance from the center of gravity to the surface 103A in contact with the rod 132 and the distance from the center of gravity to the surface 104A in contact with the rod 142 are set to be equal to each other.

With the above configuration, the correction lens frame 1
Since the points of application of the driving force are symmetrical in any driving direction with respect to the center of gravity of 00, the load applied to each driving means is equalized. Accordingly, there is no problem that only the member of one of the driving means is worn out due to the unbalanced driving, or only a specific portion of the correction lens frame 100 is worn out, which is desirable in terms of durability of each member. .

The coil spring 30 is positioned in the vicinity of the corner 100A between the notch 101 and the notch 104. One end of the coil spring 30 is engaged with a pin 31 provided on the plane of the correction lens frame 100, and the other end is engaged with a pin 32 fixed to an inner wall surface (not shown) of the optical device. And the correction lens frame 100 is moved to the optical axis OP.
In the direction perpendicular to the optical axis point in a direction perpendicular to the optical axis at 45 degrees. That is, the tip of the rod 112, 122, 132, 142 is always fixed to the side surface 1.
The correction lens frame 100 is urged so as to come into contact with 01A, 102A, 103A, and 104A with an equal urging force.

When the stepping motors 111 and 121 rotate forward, the rods 112 and 122 move along the axes Y1 and Y1, respectively.
Projecting along Y2, the correction lens frame 100 is driven in the V1 direction parallel to the axes Y1, Y2 against the urging force of the coil spring 30. When the stepping motors 111 and 121 rotate in reverse, the rods 112 and 122 respectively move along the axis Y.
1, the correction lens frame 100 is driven in the V2 direction parallel to the axes Y1 and Y2 by the urging force of the coil spring 30.

Similarly, stepping motors 131 and 1
When the 41 rotates forward, the rods 132 and 142 project along the axes X1 and X2, respectively, and the correction lens frame 100 is driven in the H1 direction parallel to the axes X1 and X2 against the urging force of the coil spring 30. When the stepping motors 131 and 141 reversely rotate, the rods 132 and 142 retreat along the axes X1 and X2, respectively, and the correction lens frame 100 is driven in the H2 direction parallel to the axes X1 and X2 by the urging force of the coil spring 30.

FIG. 2 is a sectional view taken along line AA of FIG. Corner 1 sandwiched between cutout portion 101 and cutout portion 103 of correction lens frame 100 inside the outer frame of the optical device
At positions corresponding to 00B (see FIG. 1), inner wall surfaces 40 and 41 that extend into the optical device at predetermined intervals are formed. Similarly, the notch 102 and the notch 104 of the correction lens frame 100 inside the outer frame of the optical device.
The inner wall surfaces 50 and 51 extending into the optical device at predetermined intervals are formed at positions corresponding to the corners 100C (see FIG. 1) sandwiched between the optical devices. Inner wall surfaces 40 and 50
Are positioned such that the side surfaces on the inner wall surfaces 41 and 51 sides are included in the same plane, and the same plane is orthogonal to the optical axis of another optical system of the optical apparatus. Correction lens frame 1
00 is disposed such that the corner 100B is positioned between the gap defined by the inner wall surface 40 and the inner wall 41, and the corner 100C is positioned between the gap defined by the inner wall 50 and the inner wall 51. Is done.

A projection 42 projecting toward the correction lens frame 100 is formed on the side surface of the inner wall surface 40 facing the corner 100B. A hole 43 having a predetermined depth is formed at a position corresponding to the protrusion 42 on a side surface of the inner wall surface 41 facing the corner 100B. Hole 4
A pin 44 is provided on 3, and a compression spring 45 is provided between the end of the pin 44 and the bottom of the hole 43. The pin 44 constantly presses the corner 100B by the urging force of the compression spring 45. A point SP1 indicated by a broken line in FIG. 1 is a position where the projection 42 comes into contact with the corner portion 100B and is pressed by the pin 44.

On the side surface of the inner wall surface 50 facing the corner portion 100C, a projection 52 projecting toward the correction lens frame 100 is formed. The protrusion 52 has the same height as the protrusion 42. A hole 53 having a predetermined depth is formed at a position corresponding to the projection 52 on a side surface of the inner wall surface 51 facing the corner 100C. Hole 5
3 is provided with a pin 54, and a compression spring 55 is provided between the end of the pin 54 and the bottom of the hole 53. Due to the urging force of the compression spring 55, the pin 54 is always
0C is pressed. Point SP2 indicated by a broken line in FIG.
However, the projections 52 come into contact with the
This is the position that is pressed.

The corner 100A of the correction lens frame 100
(See FIG. 1), and a corner 100D (see FIG. 1) sandwiched between the notch 102 and the notch 103.
Are formed at the positions corresponding to the inner wall surfaces (not shown) extending toward the inside of the optical device in the same manner as the inner wall surfaces 40, 41, 50, and 51, and the corner portions 100A and 100D correspond respectively. It is positioned in the gap defined by the inner wall surface. Furthermore, like the corners 100B and 100C,
A protrusion (not shown) having the same height as the protrusions 42 and 52 abuts the corners 100A and 100D, and the pin 4
Pins (not shown) similar to the pins 4 and 54 press the corners 100A and 100D by the urging force of the compression spring. The points SP3 and SP4 in FIG.
This is the position at which the protrusion comes into contact at 0D and is pressed by the pin.

That is, the correction lens 1 fixed to the correction lens frame 100 by the above-described protrusions, pins, and compression springs.
0 is always kept parallel to the optical axis of another optical system of the optical apparatus, and the optical axis OP of the correction lens frame 100
The correction lens frame 100 is supported inside the optical device while the movement along is controlled.

The biasing force of the compression spring is adjusted so as not to hinder the driving of the correction lens frame 100 by the first to fourth actuators 110, 120, 130, 140. Further, the points SP1 to SP4 and the correction lens frame 100 are relatively positioned so as not to come off from the above-described protrusions and holes even when the correction lens frame 100 is driven to the maximum.

FIG. 3 is a block diagram of a correction lens drive circuit for correcting the movement of the optical axis in the vertical direction in the first embodiment. The V gyro sensor 151 detects and outputs the optical axis blur angular velocity in the vertical direction of the photographing optical system of the optical device.
An integrating circuit 152 is connected to the V gyro sensor 151. The optical axis shake angular velocity output from the V gyro sensor 151 is integrated by an integration circuit 152, converted into an optical axis angle shake amount, and output. An A / D converter 153 is connected to the integrating circuit 152, and the optical axis angle shift amount is converted into a digital value in the A / D converter 153.

The V step counter 154 counts the number of step drives of the first actuator 110 and the second actuator 120 by the stepping motor 111,
The addition or subtraction is performed according to the rotation direction of 121. In the first embodiment, when the stepping motors 111 and 121 rotate forward, the first and second actuators 11
When the step drive numbers of 0 and 120 are added and the rotation is reversed, the step drive numbers of the first and second actuators 110 and 120 are subtracted.

The comparison circuit 155 includes an A / D converter 153
And a V step counter 154 are connected, and the difference between the respective output signals is calculated. That is, A / D
The amount of blur of the optical axis of the photographing optical system output from the converter 153 and the amount of displacement of the first and second actuators 110 and 120
V step counter 15 is added to the driving amount per step driving.
The difference from the driving amount of the correction lens frame 100 obtained by integrating the number of steps calculated by 4 is calculated and output.

The pulse generator 156 is connected to the comparison circuit 155. The pulse generator 156 is connected to the comparison circuit 15
A drive pulse is applied to the first and second actuators 110 and 120 so that the difference output from 5 is eliminated.

That is, the first and second actuators 110 and 12 are operated by the above-described arithmetic processing of the comparison circuit 155.
0 are driven by the same amount.

The third and fourth actuators 13
Similar gyro sensors, step counters, comparison circuits, and the like are connected to 0 and 140, and similarly to the image shake correction in the vertical direction, the blur angle amount of the optical axis of the photographing optical system in the horizontal direction and the correction lens The third and fourth actuators 130,
140 are driven by the same amount.

FIG. 4 is a front view of an image blur correction mechanism to which the second embodiment according to the present invention is applied, and members similar to those of the first embodiment are denoted by the same reference numerals. In FIG. 4, a notch 201 is formed at the left end of the correction lens frame 200, and a first vertical driving unit 210 (first driving unit) is provided in the notch 201. The DC motor 211 of the first vertical driving means 210 is fixed to the inner wall surface of the optical device near the notch 201 (not shown), and is rotatable around the axis Y1. DC
A pinion gear 213 is fixed to the bottom end of the output shaft 212 of the motor 211. A flat gear 214 meshes with the pinion gear 213, and a feed screw 215 is fixed by caulking at the center of the flat gear 214. Feed screw 2
Reference numeral 15 passes through a hole of a bearing 216 fixed to the inner wall surface of the optical device by a method not shown. The feed screw 215 is screwed into a thread engraved on the inner wall surface of the hole of the bearing 216. An end of the feed screw 215 opposite to the end fixed by caulking to the spur gear 214 has a notch 2
01, a side surface 20 orthogonal to an axis parallel to the axis Y1
It is in contact with 1A.

That is, the first vertical driving means 210 rotates around the axis Y 1 of the DC motor 211, and the rotation is transmitted to the feed screw 215 via the output shaft 212, the pinion gear 213, and the flat gear 214. Then, since the bearing 216 is fixed to the inner wall surface of the optical device, the feed screw 215 advances and retreats along the axis Y1.

In the output shaft 212, a pinion gear 213
An encoder 21 is provided on the end opposite to the end on which the
7 (first position detecting means) is provided. A pair of photo interrupters 217 fixed to the inner wall surface of the optical device
A and a code plate 217B. The code plate 217B is fixed to an end of the output shaft 212. The pair of photo-interrupters 217A are arranged so that the phases generated by the respective pulses in accordance with the rotation of the code plate 217B are shifted by a predetermined amount. Therefore, the rotation direction of the code plate 217B can be detected by detecting which of the pair of photo interrupters 217A generates the pulse first. That is, the rotation amount and the rotation direction of the DC motor 211 are detected by the encoder 217.

In FIG. 4, a notch 202 is formed at the right end of the correction lens frame 200. Notch 2
02 is provided with a second vertical driving means 220 (second driving means). Second vertical driving means 220
Is a DC motor 221 rotatable about an axis Y2 parallel to the axis Y1, a pinion gear 223 fixed to the output shaft 222 of the DC motor 221, a flat gear 224 meshing with the pinion gear 223, and a feed fixed to the flat gear 224 by caulking. A screw 225 is provided similarly to the first vertical driving means 210. An end of the feed screw 225 opposite to the end fixed by caulking to the spur gear 224 has a notch 2
02, a side surface 20 orthogonal to an axis parallel to the axis Y2
It is in contact with 2A. An encoder 227 (second encoder) similar to the encoder 217 is provided on an end of the output shaft 222 opposite to the end to which the pinion gear 223 is fixed.
Position detecting means), and the encoder 227
Thus, the rotation amount and the rotation direction of the DC motor 221 are detected.

That is, the first and second vertical driving means 210 and 220 and the encoders 217 and 227 are positioned symmetrically with respect to the optical axis OP. Also, the first and second vertical driving means 210, 220
Each is composed of the same members, that is, a DC motor, a pinion gear, a spur gear, and a feed screw.

In FIG. 4, a notch 203 is formed at the upper end of the correction lens frame 200. Notch 2
03 is provided with first lateral driving means 230 (third driving means). First lateral driving means 230
Is a DC motor 231 rotatable around the axis X1,
A pinion gear 233 fixed to the output shaft 232 of the motor 231, a flat gear 234 meshing with the pinion gear 233,
A feed screw 235 caulked and fixed to the spur gear 234 is provided similarly to the first and second vertical driving means 210 and 220. An end of the feed screw 235 opposite to the end fixed by caulking to the spur gear 234 has a notch 2
03, a side surface 20 orthogonal to an axis parallel to the axis X1
It is in contact with 3A. An encoder 237 similar to the above-described encoder is disposed on an end of the output shaft 232 opposite to the end to which the pinion gear 233 is fixed.
A rotation amount and a rotation direction are detected.

Similarly, in FIG.
A notch 204 is formed at the lower end of the. A second lateral drive means 240 (fourth drive means) is provided in the notch 204. Second lateral driving means 2
40 is a D that is rotatable about an axis X2 parallel to the axis X1.
A pinion gear 243 fixed to the output shaft 242 of the C motor 241 and the DC motor 241, a flat gear 244 meshing with the pinion gear 243, and a feed screw 245 fixed to the flat gear 244 by caulking are also provided. Feed screw 2
The end opposite to the end fixed to the spur gear 244 at 45 is in contact with a side surface 204 </ b> A orthogonal to an axis parallel to the axis X <b> 2 in the notch 204. An encoder 247 similar to the above-described encoder is disposed on an end of the output shaft 242 opposite to the end to which the pinion gear 243 is fixed.
47 detects the amount and direction of rotation of the DC motor 241.

That is, the first and second lateral driving means 230 and 240 and the encoders 237 and 247 are positioned symmetrically with respect to the optical axis OP. Also, the first and second lateral driving means 230, 240
Each is composed of the same members, that is, a DC motor, a pinion gear, a spur gear, and a feed screw.

Further, in the second embodiment, the same coil spring 30 as that of the first embodiment is provided, and the tips of the feed screws 215, 225, 235, and 245 always face the side surfaces 201A, 202A, 203A, and 204A. The correction lens frame 200 is urged so as to abut against each other with an equal urging force.

That is, when the DC motor 211 rotates in the direction a1 around the axis Y1 and the DC motor 221 rotates in the direction b1 around the axis Y2, the feed screws 215 and 225 protrude along the axes Y1 and Y2, respectively. The frame 200 has axes Y1 and Y1 against the urging force of the coil spring 30.
It is driven in the V1 direction parallel to 2. When the DC motor 211 rotates in the direction a2 around the axis Y1, and when the DC motor 221 rotates in the direction b2 around the axis Y2, the feed screws 215 and 225 retreat along the axes Y1 and Y2, respectively. Driven in the V2 direction parallel to the axes Y1 and Y2 by the urging force of 30.

Similarly, when the DC motor 231 rotates in the direction c1 around the axis X1 and the DC motor 241 rotates in the direction d1 around the axis X2, the feed screws 235 and 245 protrude along the axes X1 and X2, respectively. Lens frame 2
00 is the axis X1, X2 against the urging force of the coil spring 30.
Is driven in the H1 direction parallel to When the DC motor 231 rotates in the direction c2 around the axis X1, and when the DC motor 241 rotates in the direction d2 around the axis X2, the feed screws 235 and 245 recede along the axes X1 and X2, respectively. Axis X by the urging force of 30
1 and driven in the H2 direction parallel to X2.

The correction lens frame 200 has the same square shape as the correction lens frame 100 according to the first embodiment, and holds the correction lens 10 so that the optical axis OP of the correction lens 10 passes through the central portion at right angles. Have been. That is, the distance from the center of gravity to the surface 201A where the feed screw 215 is in contact is equal to the distance from the center of gravity to the surface 202A where the feed screw 225 is in contact, and the surface 203A where the feed screw 235 is in contact from the center of gravity. And the feed screw 2 from the center of gravity
The distances to the surface 204A with which 45 is in contact are equal to each other. Therefore, since there is a point of application of the driving force symmetrically in any driving direction with respect to the center of gravity of the correction lens frame 200, the load applied to each driving unit is equalized. That is, similarly to the first embodiment, each member has a desirable configuration in terms of durability and the like.

Further, the correction lens frame 10 of the first embodiment
0, the corners 200A, 20A of the correction lens frame 200.
0B, 200C, and 200D are supported by a projection, a pin, and a compression spring provided on the inner wall surface of the optical device. Therefore, the optical axis OP of the correction lens 10 is always kept parallel to the optical axis of another optical system of the optical device, and the movement of the correction lens frame 200 along the optical axis OP is restricted.

FIG. 5 is a block diagram of a correction lens drive circuit for correcting the movement of the optical axis in the vertical direction in the second embodiment. As in the first embodiment, the V-gyro sensor 251 detects the optical axis blur angular velocity in the vertical direction of the photographing optical system of the optical apparatus, and the integration circuit 252 integrates the optical axis blur angular velocity and converts it into the optical axis angular blur amount. , A / D converter 253 converts the optical axis angle blur amount into a digital value.

The V counter 254 is connected to the encoder 217, detects the rotation amount and the rotation direction of the DC motor 211 based on the pulse train output from the pair of photo interrupters 217A, and controls the correction lens frame 200 by the DC motor 211. The drive amount is added or subtracted. Similarly,
The V counter 255 is connected to the encoder 227, detects the rotation amount and the rotation direction of the DC motor 221 based on the pulse train output from the pair of photointerrupters 227A, and corrects the correction lens frame 2 by the DC motor 221.
The drive amount of 00 is added or subtracted.

In the second embodiment, the DC motor 211
Rotates in the rotation direction a1 and the DC motor 221 rotates in the rotation direction b.
1, the driving amount of the correction lens frame 200 is added, and the DC motor 211 rotates in the rotation direction a2 and
When the motor 221 rotates in the rotation direction b2, the drive amount of the correction lens frame 200 is subtracted.

An A / D converter 253 and a V counter 254 are connected to the comparison circuit 256. Comparison circuit 256
Then, the difference between the optical axis angle shift amount of the digital value output from the A / D converter 253 and the drive amount of the correction lens frame 200 output from the V counter 254 is calculated, and the difference amount is reduced. The rotation information of the DC motor 211 is calculated and output to the D / A converter 258. D / A converter 2
58 converts the difference amount calculated by the comparison circuit 256 into an analog value and outputs the analog value to the DC motor 211. DC motor 2
Reference numeral 11 is driven in a predetermined direction by a predetermined amount based on an analog value output from the D / A converter 258. Similarly, the comparison circuit 257 includes an A / D converter 253 and a V counter 25.
5 is connected, and the difference between the optical axis angle shift amount of the digital value output from the A / D converter 253 and the drive amount of the correction lens frame 200 output from the V counter 255 is calculated, and the difference is calculated. The rotation information of the DC motor 221 is calculated so as to reduce the amount, and is output to the D / A converter 259.
In the D / A converter 259, the difference amount calculated by the comparison circuit 256 is converted into an analog value, and the DC motor 221
Output to The DC motor 221 is a D / A converter 259
Is driven in a predetermined direction in a predetermined amount based on the analog value output from the controller.

The DC motors 231 and 241 are connected to a gyro sensor for calculating the optical axis shake angular velocity in the horizontal direction of the photographing optical system, a counter for detecting a pulse train of the encoders 237 and 247, and the like. Similarly to the image blur correction, the DC motors 231 and 241 are driven so that the difference between the blur angle of the optical axis of the photographing optical system in the horizontal direction and the drive amount of the correction lens frame 200 is eliminated.

FIG. 6 is a front view of an image blur correction mechanism to which the third embodiment according to the present invention is applied, and FIG. 7 is a sectional view taken along line BB of FIG. In FIG. 6, some members are omitted in order to clearly show the main part of the image blur correction mechanism. 6 and 7, the same members as those in the first embodiment and the second embodiment are denoted by the same reference numerals.

In FIG. 6, at the left end of the correction lens frame 300, a first vertical driving means 310 (first driving means) is provided. The first vertical driving means 310 includes a flat coil 311 fixed to the surface of the correction lens frame 300,
Yoke 312 and 3 fixed to inner wall surface 60 of optical device
13. Permanent magnet 31 attracted to yoke 312 by magnetic force
4. Permanent magnet 315 attracted to yoke 313 by magnetic force
It has.

The flat coil 311 is a flat coil having a thin axial thickness of a conductor wound around an axis parallel to the optical axis OP of the correction lens 10. In the flat coil 311, the axial dimension of the conductor wound around an axis parallel to the optical axis OP is a plane orthogonal to the axial direction, that is, the optical axis O.
It is smaller than the dimension in the plane direction parallel to the plane perpendicular to P. Furthermore, the conductor is not wound around an axis parallel to the optical axis OP, and an air core is formed.

Each of the yokes 312 and 313 has a U-shaped cross section. The upper half of the left end of the correction lens frame 300 is positioned in the recess of the yoke 312, and the lower half of the left end of the correction lens frame 300 is positioned in the recess of the yoke 313.

The permanent magnet 314 is a rectangular flat plate, and is positioned in the concave portion of the yoke 312 on the surface of the inner side surface 312 A facing the correction lens frame 300. Similarly, the permanent magnet 315 is also a rectangular flat plate so that the N pole side plane of the permanent magnet 314 is attracted to the yoke 312 and the S pole side plane faces the flat coil 311 on the correction lens frame 300. The inner surface 31 opposed to the correction lens frame 300 in the concave portion of the yoke 313 such that the pole side plane is attracted to the yoke 313 and the N pole side plane is opposed to the flat coil 311.
It is positioned on the surface of 3A.

That is, the flat coil 311 is affected by the magnetic flux density formed by the permanent magnet 314 and the yoke 312 on the upper side, and the permanent magnet 31 on the lower side.
5. It is positioned at a position affected by the magnetic flux density formed by the yoke 313. Therefore, the flat coil 3
When a current flows through the flat coil 311 when an electric current flows in the e1 direction, the correction lens frame 300 is driven in the V1 direction. When a current flows through the flat coil 311 in the e2 direction, the correction lens frame 300 is driven by the electromagnetic force. Are driven in the V2 direction.

In the correction lens frame 300, the flat coil 3
A slit 316 is engraved at a position corresponding to the winding axis of the 11 conductors (the center of the air core of the flat coil 311). The cross-sectional shape of the slit 316 is an elongated rectangle whose longitudinal direction extends in the horizontal direction. Inner wall surface 60 of optical equipment
At the position corresponding to the slit 316, the PSD (P
position Sensitive Device)
317 is provided. PS across slit 316
On the other side of D317, an LED (Light Emit
ing Diode) 318 is provided.

That is, the correction lens frame 300, PSD3
The LED 17 and the LED 318 are relatively positioned so that a light beam emitted from the LED 318 passes through the slit 316 and enters the PSD 317. Therefore, LED3
The amount of movement of the correction lens frame 300 in the V1 direction or the V2 direction is detected based on the output current of the PSD 317 that changes according to the amount of light flux emitted from the PSD 18 and incident on the PSD 317.

In FIG. 6, at the right end of the correction lens frame 300, a second vertical driving means 320 (second driving means) is provided. The second vertical driving means 320 has the same configuration as the first vertical driving means 310. That is, the second vertical driving means 320
00, a pair of yokes (not shown) fixed to the inner wall surface 60 of the optical device, a permanent magnet 324 attracted to each yoke by magnetic force,
The correction lens frame 300 is driven in the V1 direction or the V2 direction by an electromagnetic force when a current flows through the flat coil 321 in a predetermined direction.

Further, in the correction lens frame 300, at a position corresponding to the winding axis of the conductor of the flat coil 321 (the center of the air core portion of the flat coil 321), the slit 326 extending in the longitudinal direction of the cross-sectional shape extends in the horizontal direction. Is provided, and a PSD 327 is provided at a position corresponding to the slit 326 on the inner wall surface 60 of the optical device, and an LED 328 is provided on the opposite side of the PSD 327 across the slit 326. Like the PSD 327 and the LED 328 described above, the PS
V of the correction lens frame 300 based on the output current of D327.
The movement amount in one direction or the V2 direction is detected.

As described above, the first and second longitudinal driving means 310 and 320 are respectively positioned symmetrically with respect to the optical axis OP, and are permanently attached to the same member, that is, the flat coil and the yoke by magnetic force. It is composed of magnets.

In FIG. 6, first lateral driving means 330 (third driving means) is provided at the upper end of the correction lens frame 300, and second lateral driving means 340 (fourth driving means) is provided at the lower end. Drive means). The first and second horizontal driving units 330 and 340 have the same configuration as the first and second vertical driving units 310 and 320 described above. That is, the first lateral driving means 330 includes a flat coil 331 fixed to the surface of the correction lens frame 300, a pair of yokes (not shown) fixed to the inner wall surface 60 of the optical device, and a magnetic force applied to each yoke. The second lateral driving means 340 includes permanent magnets 334 and 335 which are attracted, and the flat coil 34 fixed to the surface of the correction lens frame 300.
1. A pair of yokes (not shown) fixed to the inner wall surface 60 of the optical device, and permanent magnets 344 and 345 attracted to the respective yokes by magnetic force. Flat coil 33
An electric current is caused to flow in predetermined directions at 1 and 341, and the correction lens frame 300 is driven in the H1 direction or the H2 direction by the electromagnetic force generated in each flat coil.

As described above, the first and second lateral driving means 330 and 340 are positioned symmetrically with respect to the optical axis OP, and are permanently attached to the same member, that is, the flat coil and the yoke by magnetic force. It is composed of magnets.

In the correction lens frame 300, at a position corresponding to the axis of winding of the conductor of the flat coil 331 (the center of the air core of the flat coil 331), a slit 336 whose longitudinal direction of the cross-sectional shape extends in the vertical direction is provided. Is provided, and a PSD 337 is provided at a position corresponding to the slit 336 on the inner wall surface 60 of the optical device, and an LED 338 is provided on the opposite side of the PSD 337 across the slit 336. Similarly, in the correction lens frame 300, the flat coil 3
At a position corresponding to the winding axis of the 41 conductor (the center of the air core portion of the flat coil 341), a slit 346 whose longitudinal direction of the cross-sectional shape extends in the longitudinal direction is engraved, and the slit 346 is formed on the inner wall surface 60 of the optical device. P at the position corresponding to the slit 346
SD347 is provided, and PSD is sandwiched between slits 346.
The LED 348 is provided on the opposite side of the 347. P
SD337 and LED338, and PSD347 and LED
With 348, the amount of movement of the correction lens frame 300 in the H1 direction or the H2 direction is detected.

Further, similarly to the correction lens frames 100 and 200 of the first and second embodiments, at the corners 300 A, 300 B, 300 C and 300 D of the correction lens frame 300, projections provided on the inner wall surface of the optical device, It is supported by pins and compression springs. Therefore, the optical axis OP of the correction lens 10
Is always kept parallel to the optical axis of another optical system of the optical device, and the movement of the correction lens frame 300 along the optical axis OP is regulated.

FIG. 8 is a block diagram of a correction lens driving circuit for correcting the movement of the optical axis in the vertical direction in the third embodiment. As in the first and second embodiments, the V gyro sensor 3
The optical axis deviation angular velocity in the vertical direction of the photographing optical system of the optical device is detected by 51, and the integration angle of the optical axis deviation angular velocity is calculated by the integration circuit 352 and converted into an optical axis angle deviation amount.

The PSD 317 has a V-direction position calculation circuit 35.
3 is connected, and calculates and outputs the vertical position of the correction lens frame 300 based on the current output from the PSD 317. Similarly, the PSD 327 is connected to a V-direction position calculation circuit 354, which calculates and outputs the vertical position of the correction lens frame 300 based on the current output from the PSD 327.

The comparing circuit 355 includes an integrating circuit 352 and V
The direction position calculation circuit 353 is connected. Comparison circuit 3
At 55, the difference between the optical axis angle blur amount output from the integration circuit 352 in the vertical direction of the optical axis of the photographing optical system and the vertical position information of the correction lens frame 300 output from the V direction position calculation circuit 353. The quantity is calculated. Further, the direction of the current flowing through the flat coil 311 is calculated and output by the comparison circuit 355 so that the correction lens frame 300 is driven and the difference amount is reduced. Comparison circuit 3
The output signal of 55 is amplified by the amplifier circuit 357 and output to the flat coil 311, and a current in a predetermined direction flows through the flat coil 311.

Similarly, the comparing circuit 356 includes the integrating circuit 35
2 and V direction position calculation circuit 354 are connected, and in a comparison circuit 356, an optical axis angle fluctuation amount in the vertical direction of the optical axis of the imaging optical system output from the integration circuit 352;
The difference between the correction lens frame 300 and the position information in the vertical direction output from the V-direction position calculation circuit 354 is calculated. Further, the direction of the current flowing through the flat coil 321 is calculated and output by the comparison circuit 356 so that the correction lens frame 300 is driven to reduce the difference amount. The output signal of the comparison circuit 356 is power-amplified by the amplifier circuit 358 and output to the flat coil 321, and a current in a predetermined direction flows through the flat coil 321.

In the third embodiment, a correction lens driving circuit having the same configuration as that of FIG. 8 is provided for correcting the movement of the optical axis in the horizontal direction. That is, the lateral gyro sensor, the blur angle amount in the horizontal direction of the optical axis of the photographing optical system calculated by the integration circuit, and the PSD 337.
And 347, a current is caused to flow through the flat coils 331 and 341 in a predetermined direction so that a difference between the correction lens frame 300 and the horizontal position detected based on the output current of the correction lens frame 300 decreases.

As described above, according to the first to third embodiments, two driving means for driving the correction lens frame in the same direction are provided with the optical axis OP of the correction lens 10 interposed therebetween. Linearity is easily maintained in driving the frame. That is, to maintain the linearity of the driving direction of the correction lens,
There is no need for a frame member or a guide member requiring high-precision dimensions and shapes. Therefore, smooth driving of the correction lens frame is easily performed, and manufacture of the image blur correction mechanism is also easy.

Further, since the driving force in the same direction is distributed to the two driving means, each driving means can be downsized.
As a result, downsizing of the entire optical device on which the image blur correction mechanism is mounted can be realized.

Further, according to the first and second embodiments, since each driving means is provided in the cutout provided in a part of the lens holding frame, the size of the entire apparatus can be reduced.

[0090]

As described above, according to the present invention, an image blur correction mechanism having a simple structure and capable of accurately driving the correction lens can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a correction control mechanism to which a first embodiment of the present invention is applied.

FIG. 2 is a sectional view of a correction control mechanism according to the first embodiment.

FIG. 3 is a block diagram of the first embodiment.

FIG. 4 is a front view of a correction control mechanism to which a second embodiment of the present invention is applied.

FIG. 5 is a block diagram of a second embodiment.

FIG. 6 is a front view of a correction control mechanism to which a third embodiment of the present invention is applied.

FIG. 7 is a sectional view of a correction control mechanism according to a third embodiment.

FIG. 8 is a block diagram of a third embodiment.

[Explanation of symbols]

 10 Correction lens 100, 200, 300 Correction lens frame 111, 121, 131, 141 Stepping motor 112, 122, 132, 142 Rod 211, 221, 231, 241 DC motor 215, 225, 235, 245 Feed screw 217, 227, 237,247 Encoder 311,321,331,341 Flat coil 312,322,332,342 Permanent magnet 313,323,333,343 Permanent magnet 317,327,337,347 PSD 318,328,338,348 LED

Claims (17)

[Claims] 1. A correction optical system for correcting image blur of an optical device, a holding frame for holding the correction optical system, and a first axis in a plane orthogonal to an optical axis of the correction optical system. A first pair of driving mechanisms including a first driving unit and a second driving unit that are driven along the axis, and the holding frame is moved along the second axis orthogonal to the first axis in the plane. A second pair of driving mechanisms each including a third driving unit and a fourth driving unit that are driven; the first driving unit and the second driving unit; and the third driving unit and the second driving unit. 4. The image blur correction mechanism according to claim 4, wherein each of the driving means is disposed so as to sandwich the optical axis of the correction optical system. 2. An angular velocity detecting means for detecting an angular velocity of a shake of an optical axis of a photographing optical system of the optical apparatus; a shake angle calculating means for calculating a shake angle of an optical axis of the photographing optical system from the angular velocity; Control means for calculating a drive amount of the first, second, third, and fourth drive means for driving the correction optical system so that the shake angle is offset. The first drive unit and the second drive unit are driven by the same amount in the first pair of drive mechanisms, respectively, and the third drive unit and the fourth drive unit are driven in the second pair of drive mechanisms. The image blur correction mechanism according to claim 1, wherein each of the first and second is driven by the same amount. 3. The first pair of drive mechanisms, wherein the first and second drive means are each formed of the same member, and wherein the second pair of drive mechanisms include the third and fourth drive mechanisms.
2. The image blur correction mechanism according to claim 1, wherein said driving means are formed of the same member. 4. The first driving means and the second driving means are respectively responsive to rotation of a first motor rotatable about an axis parallel to the first axis and rotation of the first motor. And a first movable part movable along the first axis. The first movable part of the first drive means and the first movable part of the second drive means The holding frame is driven along the first axis in response to the movement, and the third driving unit and the fourth driving unit are each rotatable around an axis parallel to the second axis. 2
And the second motor according to the rotation of the second motor.
A second movable portion movable along the axis of the second drive portion, in accordance with the movement of the second movable portion of the third drive means and the second movable portion of the fourth drive means. The image blur correction mechanism according to claim 3, wherein the holding frame is driven along the second axis. 5. In the first and second driving means,
The first motor is a stepping motor, the first movable portion is a rod that supports the first motor and directly presses the holding frame, and the third and fourth driving means 5. The device according to claim 4, wherein the second motor is a stepping motor, and the second movable portion is a rod that supports the second motor and directly presses the holding frame. 2. The image blur correction mechanism according to 1. 6. In the first and second driving means, the first motor is a DC motor, and the first movable portion is a feed screw for directly pressing the holding frame,
The first and second driving units further include a first transmission unit that converts a rotational motion of the first motor into a linear motion of the first movable unit, and the third and the fourth driving units. In the driving means, the second motor is a DC motor, the second movable portion is a feed screw that directly presses the holding frame, and the third and the fourth driving means further include: 5. The image blur correction mechanism according to claim 4, further comprising a second transmission unit that converts a rotational motion of a second motor into a linear motion of the second movable unit. 7. The image blur correction mechanism according to claim 3, wherein the first, second, third, and fourth driving units are each an electromagnetic coil including a coil and a permanent magnet. 8. The permanent magnet of the first, second, third and fourth driving means, wherein the coils of the first, second, third and fourth driving means are fixed to the holding frame. 8. The light source is fixed inside the optical device.
2. The image blur correction mechanism according to 1. 9. A first pair of position detection mechanisms comprising first position detection means and second position detection means for detecting the position of the holding frame in a direction along the first axis, A second pair of position detection mechanisms including a third position detection unit and a fourth position detection unit for detecting a position of the holding frame in a direction along a second axis, and the first position detection unit 8. The apparatus according to claim 6, wherein the second position detecting means and the third position detecting means and the fourth position detecting means are disposed with the optical axis interposed therebetween. 2. The image blur correction mechanism according to 1. 10. The first, second, third, and fourth position detecting means are each composed of a photo interrupter fixed inside the optical device and a code plate fixed to an end of the DC motor. The image blur correction mechanism according to claim 9, wherein the encoder comprises: 11. The first, second, third and fourth position detecting means each include a light emitting element and a position detecting element for detecting a position of incident light, wherein the light emitting element and the position detecting element are The image blur correction mechanism according to claim 9, wherein the image blur correction mechanism is provided along the optical axis with a slit formed in the holding frame interposed therebetween. 12. An end of said first movable portion of said first drive means and said second drive means is always in contact with said holding frame and said third drive means and said fourth drive means. 5. The image blur correction mechanism according to claim 4, further comprising: urging means for urging the holding frame such that an end of the second movable portion is always in contact with the holding frame. 13. A notch corresponding to the first, second, third, and fourth driving means is formed in a part of the holding frame, and the first, second, and third notches are formed. 5. The image blur correction mechanism according to claim 4, wherein at least a part of each of the fourth driving unit and the fourth driving unit is disposed in the corresponding notch. 14. The notch in which the first driving means is disposed and the notch in which the second driving means is disposed have a pressed surface orthogonal to the first axis. Wherein the first movable portion and the second movable portion abut against the pressed surface of the corresponding notch portion orthogonal to the first axis, and the third drive means is provided. The notch and the notch provided with the fourth driving means have a pressed surface orthogonal to the second axis, and the third movable part and the fourth 14. The image blur correction mechanism according to claim 13, wherein each of the movable portions abuts on the pressed surface orthogonal to the second axis of the corresponding notch. 15. A movement of the holding frame along the optical axis of the correction optical system is restricted, and the optical axis of the correction optical system is always parallel to the optical axes of other optical systems of the optical device. The image blur correction mechanism according to claim 1, further comprising a holding unit that holds the holding frame. 16. A projection member provided on an inner wall surface of the optical device, the projection member abutting on one plane of the holding frame orthogonal to the optical axis of the correction optical system, and a support member of the correction optical system. Abut on a position corresponding to the projecting member on the other plane of the holding frame orthogonal to the optical axis,
A pressing member that can be driven along the optical axis of the correction optical system; and a biasing member that biases the pressing member toward the holding frame along the optical axis of the correction optical system, 16. The holding frame is sandwiched between the protrusion and the pressing member by a biasing force of a biasing member.
2. The image blur correction mechanism according to 1. 17. A correction optical system for correcting an image blur of an optical device, a holding frame for holding the correction optical system, and the holding frame along a same axis in a plane orthogonal to an optical axis of the correction optical system. An image blur correction mechanism, comprising: a pair of driving means, each of which is disposed so that each driving force acts on the holding frame with the optical axis interposed therebetween.