JPH10186437A - Driving force generating device applied to image blur preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the constitution of a driving force generating device, which generates driving force in two different directions by superposing and arranging two coils having nearly the shape of figure 8 and making magnetic field act on four areas where the coils cross each other. SOLUTION: The coils 1 and 2 have the same shape and present nearly the shape of figure 8. The coils 1 and 2 are stuck to be integrated perpendicularly to each other in a state where the longitudinal axis of the coil 1 is set in direction Y and the longitudinal axis of the coil 2 is set in direction X. A permanent magnet is provided so that the magnetic field may act in parallel with Z-axis direction near four areas where the windings of the coils 1 and 2 are superposed, and the magnetic field in four crossing areas is set to act in a reverse direction in the adjacent crossing areas. When a positive electrical signal and a negative electrical signal are inputted in the ends 1a and 1b of the coil 1, respectively, electromagnetic force is generated in the direction X from four linear areas where the magnetic field acts. In the case of applying the electrical signal having a reverse polarity, the electromagnetic force is generated in the reverse direction. When the electrical signal is applied to the ends 2a and 2b of the coil 2, the electromagnetic force in the direction Y is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving force generator applied to an image blur prevention device that generates a driving force using an electromagnetic force.

[0002]

2. Description of the Related Art Among actuators that use electromagnetic force, motors that generate rotational force have a long history, and various types of drive coils arranged around a rotation axis have been devised and put into practical use. Many embodiments including a voice coil type electromagnetic actuator that moves only in a straight traveling direction have been put to practical use. Well, the plane involved in this case,
Alternatively, an electromagnetic actuator that can be driven in a substantially planar direction (including a large-diameter cylindrical surface, a part of a spherical surface, or a substantially flat surface along a curved surface similar thereto, for example) often makes biaxial movement. The driving coils were separately arranged.

[0003]

However, the above-mentioned prior art has the following disadvantages.

[0004] In a motor that produces a rotational force, the rotational drive force must first be converted into a linear motion.
A configuration that does not cause interference between two drive shafts is required. In such a configuration, as a mechanism for producing a linear motion, for example, a screw rod such as a lead screw, a rack and pinion, or an end face cam is required, and the number of components constituting these mechanisms increases. In addition, there are disadvantages that the cost is increased due to an increase in the time and labor for assembling, that it is difficult to secure the required accuracy, and that the apparatus is enlarged.

[0005] In an electromagnetic actuator that produces a linear force, planar motion is produced by combining motions of two axes.
If a large space is required, including a mechanism to avoid shaft interference, or if an attempt is made to secure the movement balance of the driving object, a plurality of actuators must be placed at target positions with respect to the center of gravity of the moving object. There is a disadvantage that the cost of the magnetic force generator increases.

SUMMARY OF THE INVENTION An object of the present invention is to simplify the configuration of a driving force generator that generates driving force in two different directions, which can be applied to an image blur prevention device.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a magnetic head in a first direction and a position opposite to the magnetic field in the first direction and opposite to the magnetic field in the first direction. Magnetic field generating means for generating a magnetic field in a second direction, a current in a third direction crossing the magnetic field in the first direction, and a third direction crossing the magnetic field in the second direction A first driving force generating means for generating an electromagnetic force by flowing a current in a direction opposite to the current of the first direction, and intersecting the magnetic field in the first direction, and A current in a fourth direction different from the current and a current in a direction opposite to the current in the fourth direction intersecting with the magnetic field in the second direction flow, and an electromagnetic current in a direction different from the first driving force generating means is applied. Driving force applied to an image blur prevention apparatus having a second driving force generating means for generating a force And device, wherein the first, respectively the second driving force generating means, and is to generate a different direction of the electromagnetic force by interaction with the same magnetic field generated by said magnetic field generating means.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention. In each of the drawings, reference numeral 1 denotes a coil for generating a driving force in an X direction in the drawings, and 2 denotes a coil for generating a driving force in a Y direction in the drawings. The coils 1 and 2 have the same shape,
As shown in the figure, each of them has a substantially “8” shape.
It is also possible to make a coil wound in a thin oval or rectangular shape by twisting it 180 ° near the center. The coil 1 is bonded and integrated so that the longitudinal axis is directed in the Y direction and the coil 2 is directed perpendicular to the longitudinal axis in the X direction.

The four portions where the windings of the coils 1 and 2 overlap each other are formed as straight portions so that the coil wires cross each other at right angles. In the vicinity of the intersecting region, a permanent magnet or the like is provided so as to apply a magnetic field in parallel with the Z-axis direction in the drawing so as to connect the coils 1 and 2, and furthermore, at the four locations where the windings of the coils X and Y overlap. The magnetic field in the intersection region is set as shown in the drawing so that it acts in the opposite direction in the adjacent intersection region.

In the above configuration, when an electric signal of + and 1b is input to the end 1a of the coil 1 shown in the figure and the electric signal of-is applied to the end of the coil 1, in accordance with the well-known Fleming's left-hand rule in the region where the magnetic field of the coil wire acts. An electromagnetic force is generated, and the electromagnetic force is simultaneously generated from the four linear regions where the magnetic field acts in the X direction in the figure. With an electric signal of the opposite polarity, an electromagnetic force is generated in the direction opposite to the arrow in the X direction. In the case where an electric signal for driving is applied to the ends 2a and 2b of the two coils Y shown in the figure, an electromagnetic force in the Y direction can be generated in the same manner as in the case of the coil 1. Further, by controlling the electromagnetic force by the coils 1 and 2, an arbitrary driving force in the XY plane can be generated.

(Second Embodiment) The second embodiment relates to the shape of the coil element, and makes it easier to wind the coil in the first embodiment in accordance with the gist of the present invention. . Because of these contents, in the present embodiment, it is possible to apply a magnetic field to at least four intersection regions where the coils intersect each other as described in the description of the first embodiment. And only its arrangement will be described.

FIG. 3 is a view showing a second embodiment of the present invention, in which four coils 11a, 11b, 12a,
12b is integrated by bonding in an arrangement as shown in the figure. Here, the coils 1a and 11b correspond to the coil 1 of the above-described first embodiment. In the present embodiment, the coils 11a and 11b are each formed as a single coil, and one end of the coil 11a is formed. Are connected to one end of the coil 11b, and are connected so that a current flows in the opposite direction at the connecting portion 11e as shown in the figure.

The other end 11 of the coil 11a
c and the other end 11d of the coil 11b,
It corresponds to the two ends 1a and 1b of the coil 1 of the first embodiment, so that the coil of the present embodiment can perform the same function as in the first embodiment. In addition, the coils 12a and 12b of the present embodiment are configured in exactly the same manner as the coils 11a and 11b, and thus can perform a function corresponding to the coil 2 of the first embodiment. Since the application of the magnetic field to the four regions where the coils intersect is the same as in the first embodiment, the description is omitted here.

(Third Embodiment) FIG. 4 is a view showing a coil element used in a drive mechanism according to a third embodiment of the present invention. Except for the coil element, the first and second
Since this embodiment is the same as the embodiment, the description of the other components is omitted here. This coil is wound in opposite directions in the coil area A of 21 and the coil area B of 22. 21a is a winding start end of the winding and 22a is a winding end. Reference numerals 21b and 22b denote bobbins at the time of coil production, which are represented by cross-sectional shapes. Actually, the bobbins have a thickness in the direction of the plane of the paper and can be wound several rows a predetermined number of times in one step. However, it is removed when the coil is used.

Here, the structure of the coil of this embodiment will be described by explaining how to wind the coil. First, the bobbin 21 shown in FIG.
After a predetermined thickness of "b", the first winding is wound left and right, and the second winding is continuously wound in the same direction, and the bobbin 21b is wound when the second winding is completed. Next, the opposite bobbin 2 in the figure passes through the intersection of 23
2b, starting from the first step so as to be wound rightward in the opposite direction to the bobbin 21b. When the bobbin 21b is wound in two steps and returned to the original height, it starts passing through the intersection 23. The bobbin 21b is wound left and right as the third and fourth steps. The same applies to the intersection 23
, And wound around the bobbin so as to move to the opposite side, the respective regions divided into two in the longitudinal axis direction of the shape of a substantially “8”, which is the gist of the present invention, are respectively opposite to each other. While being formed as a coiled coil area, it is possible to easily realize one coil having a pair of substantially straight portions facing each other in the two divided areas in the same direction as the longitudinal axis, By arranging the coils so that their longitudinal axes are perpendicular to each other, a planar driving coil and a device can be provided.

The manner of applying a magnetic field to the coil element is the same as in the first and second embodiments.

(Fourth Embodiment) A fourth embodiment is an example in which the coils for planar driving shown in the first to third embodiments are applied to binoculars capable of correcting camera shake during use. Is shown. The second embodiment (corresponding to FIG. 3) is used as the shape of the coil.

FIGS. 5 to 7 show a fourth embodiment of the present invention, and FIG. 5 is a diagram showing the overall configuration.
1, 1 'are right and left objective lenses, respectively, II,
II 'denotes right and left erect prisms, respectively.
Reference numerals I and III 'denote right and left eyepieces, respectively, which constitute an optical system of prism binoculars by these optical components. The objective lenses I and I 'have corresponding optical axes A and A' as shown, and are fixed to the lens frame 101 together. The erect prisms II and II 'are fixed to the right and left rear lens barrels 102 and 102' by right and left holding members 103 and 103 ', respectively, as shown in the figure.

The eyepieces III and III 'have optical axes B and B' different from the optical axes A and A ', respectively, by the erecting prisms II and II'. 102, 102 '. Rubber cover 1
Numerals 04 and 104 'cover the appearance of the rear lens barrels 102 and 102' as shown. Rear lens barrel 102, 1
02 ′ are bayonet fitting sliding portions 102a, 1
02a '.

Next, the erecting prisms II, II ', the rear lens barrels 102, 102', and the holding members 103, 10
3 ', eyepieces III and III', rubber cover 1
04, 104 'are rear unit lens barrel units 1
05, 105 '.

Reference numeral 106 denotes a binocular main body, and bayonet sliding holes 106, 1 around the optical axes A, A 'are formed in a rear end surface 106a.
06 ', and bayonet fitting sliding portions 102a, 102a' provided in the rear group barrels 102, 102 'are fitted and inserted therein, and the rear group barrel units 105, 105' are inserted by stoppers 106, 106 '. Are held rotatably about the optical axes A and A 'with respect to the main body 106.

The rear lens barrel units 105 and 105 'are rotatable in opposite directions about the optical axes A and A' by an interlocking mechanism (not shown), and the widths of the optical axes B and B 'are predetermined. The rotation angle is limited so that it can be changed in a range. Also, the optical axis A,
A protective glass 107, 107 'around A' is fixed, and a focus adjustment knob 108 set to rotate at a fixed position, described later, is rotatable at the center of the rear end surface 106a, and 106d is provided on the side surface. Protective cover is fixed.

Reference numeral 109 denotes a front group unit, which will be described later. The front group unit 109 has a front group unit main body 110 as a basic component.

The front group unit main body 110 has two rectilinear holes 110a and 110a 'at the right and left symmetric positions in front, a rectilinear hole 110b at the rear center, and a right angle with the three rectilinear holes at the rear center. Left and right rectilinear holes 110c are provided as shown in FIG. The two straight holes 110a, 11
The small diameter portions of the stepped rollers 111, 111 'are engaged with 0a', and the respective rollers are fixed to the binocular main body 109 by screws. Further, the unit main body 110 is held so as to be pressed against the binocular main body 106 because a coil spring (not shown) is tightened by the screw around the stepped roller. By these mechanisms, the front group unit main body 110
Are two rectilinear holes 110a, 110a 'provided at left and right symmetrical positions in front of the front group unit main body 110 to be engaged with the small diameter portions of the stepped rollers 111, 111'. The guide is set to be movable in the front-rear direction while being pressed against the binocular body 106 by the guide.

Since the two rectilinear holes 110a, 110a 'provided at the front of the front group unit main body 110 are set at right and left symmetrical positions, the unit main body 110 is provided with the two rectilinear holes 110a, 110a'. And stepped rollers 11
Even a slight rotation operation is allowed within the range of minute engagement of the engagement portion having a small diameter of 1,111 '.

Next, a straight hole 11 provided at the rear center portion
A small diameter of the stepped eccentric roller 112 is engaged with 0b, and a charging coil spring similar to that described above is fastened to the binoculars main body 106 with a screw. Instead of completely fixing the stepped eccentric roller 112 to the main body, the stepped eccentric roller 1
12 is set to, for example, a semi-tightened tapping screw so as to be slightly rotatable.
The small-diameter portion 12 is set to be slightly eccentric from the large-diameter portion and the center of the screw hole (the two are concentric).

The stepped eccentric roller 112 is linked to a diopter correction knob (not shown) rotatable within a predetermined range from the outside by a link member (not shown). With such a mechanism, the front group unit main body 110 can be rotated in the horizontal direction around the optical axis by rotating a diopter correction knob (not shown), and at the same time, the entire front group unit 109 is also rotated. It is possible to make a small horizontal rotation about the optical axis.

The left and right rectilinear holes 1 provided at the rear central portion
10c is engaged with the small diameter portion of the focusing step roller 113 and further extended to extend into the longitudinal groove 106 of the binocular main body 106.
e. The large-diameter portion of the focusing roller 113 has a threaded rod 113 that extends rearward in a direction perpendicular to the roller axis.
a is screwed and fixed, and the screw rod 11
3a is adapted to be screwed into the focus adjustment knob 108 set to rotate to a fixed position as shown in the figure, so that when the focus adjustment knob 108 set to rotate to the fixed position is rotated, The front group unit main body 11
0 can be moved in the optical axis direction, and accordingly, the entire front unit 109 can be moved in the optical axis direction at the same time.

The structure of the focus adjustment knob 108 set to rotate at a fixed position will be described. The focus adjustment knob 108 has a nut 108a with a flange attached to the binocular main body 10.
The part which is engaged with the hole of No. 6 and is projected outward with the flange inside is covered with an external member 108b via a buffer member 108c as shown in the figure, and the nut 108a with the flange is attached from the rear as shown in the figure. It is attached to the rear end surface 106a of the binocular main body 106 in a state where it has friction and can be rotated at a fixed position by being screwed in so as to be pulled in.

A mechanism in which a tap is cut at the front center of the nut 108a with a flange and the screw rod 113a is screwed so that the entire front unit 109 can be moved in the optical axis direction is described above. It is on the street.

Next, the front group unit 109 will be described in detail with reference to FIGS. FIG. 6 is a diagram showing in detail the configuration of the central portion of the front group unit shown in FIG. 5 and 6, reference numeral 114 denotes a drive unit which will be described later. The drive unit causes the lens frame 101 and the I and I 'objects fixed to the lens frame 101 to the front group unit main body 110. The lenses R and L can be integrally driven in a direction perpendicular or substantially perpendicular to the optical axes A and A '.

The lens frame 101 has a hole 1 spaced apart in the height direction.
Also, holes 101a 'and 101b' are provided at positions symmetrical to the left and right, respectively. Also, holes 101a, 101b, and 10 provided in the lens frame 101 are provided.
The attitude maintaining stands 115, 115 'which are formed in the shape of "U" in a horizontal view at left and right intervals corresponding to 1a', 101b 'and have holes at corresponding positions on the upper and lower surfaces are the front group unit main body. Screwed to 110.

The posture maintaining rods 116, 116 'whose both ends are bent at right angles are respectively provided with holes 101a, 101b and 101a', 101b 'provided in the lens frame 101.
And portions bent at right angles to the holes provided in the attitude maintaining tables 115 and 115 ', respectively, penetrate simultaneously. However, the upper and lower 2 provided on the posture maintaining tables 115, 115 '
Spacers 117, 117 'are provided between the upper and lower surfaces formed in a U-shape between the two holes, and the spacers 117, 117' are provided by the set screws 118, 118 'as shown in the figure, and the posture maintaining rods 116, 116' are respectively provided. , The posture maintaining bars 116 and 116 ′ are horizontally rotated around holes provided in the posture maintaining bases 115 and 115 ′ while the play in the vertical direction is restricted. Holes 101a, 101b and 101a ', 101 provided in the lens frame 101 of the attitude maintaining rods 116, 116'.
The length in the vertical direction penetrating through b 'is slightly longer than the distance between the holes, so that the lens frame 101 does not come off even if it moves slightly up and down.

For this reason, the lens frame 101 ends up with holes 101a provided in the lens frame 101 in the vertical direction.
101b and 101a ', 101b' can be translated so as to slide, and the posture maintaining rod 116,
By moving a circle having a radius equal to the length of the optical axis 116 'in the direction of the optical axis, it is possible to move in the direction perpendicular to the optical axis, and it is possible to always maintain a posture perpendicular to the optical axis. ing.

Next, the driving section 114 will be described in detail with reference to FIGS. FIG. 7 is an exploded perspective view showing a detailed configuration of the driving unit 114. The coil used here is the same as the coil shown in the second embodiment described above, except that the X direction matches the yaw direction and the Y direction matches the pitch direction.
In principle, there is no problem in the configuration of the coil described in the first embodiment or the third embodiment.

6 and 7, reference numeral 119 denotes a drive coil in the iodine direction, which corresponds to reference numeral 11 in FIG. 3, and reference numeral 120 denotes a drive coil in the pitch direction, which corresponds to reference numeral 12 in FIG. Embedded in 12
Reference numeral 1 denotes a holding plate, and magnets 122a and
122a ′ and 123a, 123a ′ into a square 122a
6A and 123A ', and 122A' and 123A are attached so as to be located diagonally, and between the lens frame and the magnet so that the lens frame 101 can move freely.
The front group unit body 11 with a gap as shown in FIG.
Screwed to 0. Magnets 122b, 122b ',
123b and 123b 'are the magnets 122a and 122b.
a ', 123a, and 123a' are fixed to the front group unit main body 110 with their positions and magnetization directions aligned.

The magnets 122a, 122b, 123a ', 1
The magnetizing direction of 23b 'is set backward in the optical axis direction, while the magnets 123a, 123b, 122a', 122b 'are magnetized.
Of the magnets 122a, 122b, 123
It is magnetized 180 ° opposite to the magnetization direction of a ′ and 123b ′ and forward in the optical axis direction.

The ends of the windings of the drive coils 119 and 120 are connected to a drive circuit (not shown), which is controlled by a control circuit (not shown).

Further, the present apparatus is provided with, for example, IRED and P
A position detecting device (not shown) based on a combination of SDs is incorporated. A camera shake amount detecting device using a vibration gyro sensor or the like (not shown) and a camera shake amount correcting drive signal based on the camera shake amount from the camera shake amount detecting device The drive coils 119 and 1 are connected through a control circuit and a drive circuit (not shown).
20 respectively.

Next, a drive current is supplied to each winding of the drive coils 119 and 120 in order to perform the camera shake correction drive in the above configuration. Then, together with the electromagnetic force based on Fleming's left-hand rule, the lens frame 1 or the objective lenses I and I 'perform an anti-vibration operation on the front-group unit main body 110 and pull the binocular main body 106. To perform the anti-shake operation.

In the above description, the focus can be adjusted by rotating the focus adjustment knob 108 and moving the entire front group unit 109 in the optical axis direction, and by rotating the diopter correction knob (not shown). By slightly rotating the entire front group unit 109 horizontally around the optical axis, the focus images by the left and right objective lenses can be minutely moved in the opposite directions to each other for the right eye and the left eye. When used together, left and right diopter corrections are possible.

As described above, according to each of the above-described embodiments, the planar driving coil and the device can be reduced in size.
Since the driving force can be concentrated at one point despite the shaft driving, the driving force can be arranged near the center of gravity of the driving object, and there is an effect that the driving object can be driven in a well-balanced manner without rotating the driving object in a plane driving or the like. Further, since the magnetic field applied to the place where the linear portions of the two coils overlap each other can be used in common in the coils in the X and Y directions, there is an effect that the magnetic field can be used efficiently.

In the above-described fourth embodiment, the magnet is provided integrally on the apparatus main body side and the coil is provided on the movable section side. On the contrary, the coil is provided on the apparatus main body side and the movable section side is provided. A magnet may be provided. With this configuration, it is not necessary to wire the movable part, and the manufacturing process can be simplified.

In each of the above embodiments, the magnets 122a, 123a, etc., which generate the lines of magnetic force, serve as the magnetic field generating means of the present invention.
19 and the coil 120 correspond to the first and second driving force generating means of the present invention, respectively.

The correspondence between the components of the embodiment and the components of the present invention has been described above. However, the present invention is not limited to the configuration of the embodiment, and the functions described in the claims or the components of the embodiment are not limited thereto. Needless to say, any configuration can be used as long as the function of the configuration can be achieved.

According to the present invention, as a shake preventing means, a light beam changing means such as a shift optical system or a variable apex angle prism for moving an optical member in a plane perpendicular to the optical axis, and a photographing plane in a plane perpendicular to the optical axis are used. The present invention can be applied to various image blur prevention devices such as a moving device and a device that corrects a shake by image processing.

The present invention is applicable to various types of cameras such as a single-lens reflex camera, a lens shutter camera, and a video camera, as well as optical devices and other devices other than the cameras, and further to those cameras, optical devices and other devices. Device or
The present invention can be applied to the constituent elements.

The present invention may be applied to drive a movable member other than a movable member for preventing image blur.

[0049]

As described above, according to the present invention, it is possible to generate driving forces in two different directions by the same magnetic field, and to generate driving forces in two different directions. The configuration of the generator can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a planar driving coil according to a first embodiment of the present invention and lines of magnetic force to be applied.

FIG. 2 is a plan view showing a configuration of a planar driving coil according to the first embodiment of the present invention and lines of magnetic force to be applied.

FIG. 3 is a plan view showing a configuration of a planar driving coil according to a second embodiment of the present invention and lines of magnetic force to be applied.

FIG. 4 is a plan view showing a configuration of a planar driving coil according to a third embodiment of the present invention and lines of magnetic force to be applied.

FIG. 5 is a cross-sectional view showing the entire configuration of binoculars having a camera shake correction function using a planar driving coil according to a fourth embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a main part configuration of a binocular according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing an arrangement of coils and magnets of a driving unit for performing camera shake correction driving of binoculars according to a fourth embodiment of the present invention.

[Explanation of symbols]

1, 2, 11, 12, 21, 22 Coil 23 Intersection 101 Lens frame 109 Front group unit 110 Front group unit main body 114 Drive unit 115, 115 'Attitude maintaining base 116, 116' Attitude maintenance rod 119 Yaw direction driving coil 120 Pitch direction drive coils 122a, 122a ', 122b, 122b', 123
a, 123a ', 123b, 123b' magnet

Claims (9)

[Claims] 1. A magnetic field generating means for generating a magnetic field in a first direction and a magnetic field in a second direction opposite to the magnetic field in the first direction at a position different from the magnetic field in the first direction. A current in a third direction crossing the magnetic field in the first direction and a current in a direction opposite to the current in the third direction crossing the magnetic field in the second direction to generate an electromagnetic force; A first driving force generating means, a current in a fourth direction intersecting the magnetic field in the first direction, and a current in the fourth direction different from the current in the third direction of the first driving force generating means, and the second direction And a second driving force generating means for generating an electromagnetic force in a direction different from that of the first driving force generating means by flowing a current in a direction opposite to the current in the fourth direction crossing the magnetic field. A driving force generator applied to the image blur prevention device. 2. The first driving force generating means generates an electromagnetic force in a fifth direction by an interaction between a magnetic field in the first direction and a current in the third direction, and generates an electromagnetic force in a fifth direction. 2. An image blur prevention apparatus according to claim 1, wherein an electromagnetic force in a direction equal to said fifth direction is generated by an interaction between said magnetic field and a current in a direction opposite to said third direction. Driving force generator. 3. The method according to claim 2, wherein the second driving force generating means includes:
An electromagnetic force in a sixth direction is generated by the interaction between the magnetic field in the direction of the third direction and the current in the third direction, and the electromagnetic force in the sixth direction is generated by the interaction between the magnetic field in the second direction and the current in the third direction. 6
3. A driving force generator applied to an image blur prevention device according to claim 1, wherein said driving force generator generates an electromagnetic force in a direction equal to said direction. 4. A first conductive portion for flowing a current in the third direction of the first driving force generating means, and a second conductive portion for flowing a current in a direction opposite to the third direction. 4. A driving force generator applied to the image blur prevention device according to claim 1, wherein the driving force generator is arranged side by side in a direction perpendicular to the third direction. 5. A third conductive portion for flowing a current in the fourth direction of the second driving force generating means, and a fourth conductive portion for flowing a current in a direction opposite to the fourth direction. 5. A driving force generator applied to the image blur prevention device according to claim 4, wherein the driving forces are arranged side by side in the fourth direction. 6. The apparatus according to claim 1, wherein said first driving force generating means has a conductive portion for continuously guiding a current in said third direction and a current in a direction opposite to said third direction. A driving force generator applied to the image blur prevention device according to any one of Items 1 to 6. 7. The apparatus according to claim 1, wherein the second driving force generating means has a conductive portion for continuously guiding a current in the fourth direction and a current in a direction opposite to the fourth direction. A driving force generator applied to the image blur prevention device according to any one of Items 1 to 6. 8. The driving force generating device applied to the image blur prevention device according to claim 1, wherein said first and second driving force generating means include a coil. 9. A driving force generator applied to the image blur prevention device according to claim 1, wherein said magnetic field generator has a magnet.