JPH1048686A - Driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve precision at the time of driving a body to be driven by providing first and second driving means driving the body to be driven whose load for driving is changed in accordance with the state of an equipment by one degree of freedom of the driving. SOLUTION: Since the reform of bellows connecting two faces and the gravity of inside sealing liquid in the case of using a device in a horizontal state are made as force by which a variable apex angle prism 1 is opened downward, the variable apex angle prism 1 requires driving force so as to make a prism apex angle zero, and the driving force is generated by energizing a bias coil 8. The prism apex angle of the variable apex angle prism is changed by effectively using voltage applied to a driving coil 7. The bias coil 8 is driven according to the information of the low frequency component of the applied voltage of the driving coil 7. Also, positioning to a position where the prism apex angle is zero and that is the control center of the variable apex angle prism 1 is feed-back control where a difference signal (c) is amplified and is applied to the driving coil 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for driving a driven part.

[0002]

2. Description of the Related Art As an example of a conventional driving device, Japanese Patent Application Laid-Open No.
There is a driving device incorporated in the light beam deflecting device disclosed in the publication No. 76061. The above publication discloses a system for correcting camera shake by driving only one side of a variable apex angle prism. As a driving means for changing the apex angle of the prism, a magnetic circuit including a magnet, a yoke, and a gap, , A so-called moving coil type electromagnetic actuator constituted by a drive coil disposed in the vehicle.

FIG. 10 shows load characteristics of such a variable apex angle prism. The horizontal axis represents the voltage between both ends applied to the drive coil, which corresponds to the drive load. Also,
The vertical axis represents the operation amount (deflection angle) of the variable apex angle prism, and the center line of both the horizontal axis and the vertical axis represents zero. Showing a drive load characteristic of the variable apex angle prism in the curve l ₂ in FIG. The driving load characteristics of the variable apex angle prism, which is the driven body, include the spring characteristics of the bellows connecting the two glass surfaces, the viscosity and mass of the internally enclosed liquid, and the mass of the movable part.

[0004]

However, in the system disclosed in the above-mentioned publication, the variable apex prism, which is the driven body, has a habit at the time of manufacturing a bellows connecting two glass surfaces, When the apparatus is used in a horizontal state, the self-weight of the internally enclosed liquid becomes a force in the direction in which the variable apex angle prism is opened downward, so that the prism apex angle, which is the reference operating position, is zero (variable apex angle). In order to keep the two glass surfaces of the corner parallel to each other), it is necessary to apply a voltage to the drive coil in a direction to cancel the load.

For this reason, the load characteristics are as shown in FIG.
Becomes characteristic load curve l ₂ is shifted either to the applied voltage capable widths in the drive coil, reduced amount of operation of the shifted direction (deflection angle), caused the operation insufficient to operate the amount should ensure However, in the opposite direction, there is a non-use voltage region that is not applied to the drive coil, and there is a problem that the performance of the actuator cannot be sufficiently exhibited.

Further, the load in the state where the prism apex angle is zero, which is the operation reference position, changes due to the posture of the equipment and the rigidity change and deformation of the bellows due to temperature and humidity. In all situations, the actuator capability must be set to guarantee the amount of movement of the apex angle prism.

Further, when the offset voltage applied to the drive coil changes to position the driven body at the reference position, the difference between the target position signal during feedback control and the actual position signal of the driven body is amplified. Since the offset voltage is the offset voltage, there arises a problem that the actual position of the driven body changes with respect to the target position signal for positioning the driven body at the reference position.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has a driving apparatus capable of improving the accuracy of driving a driven body whose load for driving changes depending on the state of equipment. It is intended to provide.

[0009]

In order to achieve the above-mentioned object, the present invention provides a first method for driving a driven body whose load for driving changes according to the state of equipment with one degree of freedom of driving.
This is a driving device having second driving means.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a block diagram of a main part of an image stabilizing apparatus for a video camera using a variable apex angle prism according to an embodiment of the present invention. Reference numeral 1 denotes a variable apex angle prism which is a driven body, and 1-1f and 1-1m which are transparent plates made of glass or the like (as described later, the transparent plate 1-1f is fixed to the apparatus main body, The transparent plate 1-1m is movably supported by the apparatus main body), the support frames 1-2f and 1-2m supporting the transparent plates 1-1f and 1-1m, and the support frame 1-2.
It is composed of a flexible bellows-like film 1-3 connecting f and 1-2m, and a high refractive index transparent liquid (not shown) filled in the formed internal space. The transparent plate and the support frame are bonded with an adhesive, and the support frame, the bellows film and the film forming the bellows are heat-welded to seal the enclosed transparent liquid.

Reference numeral 2 denotes a part of a lens barrel of an optical system incorporating a camera shake correction device using a variable apex angle prism.
a, 3b, and 3c are a part of the lens group of the optical system. 4
Is a member on the fixed surface side of the variable apex angle prism 1 (transparent plate 1-1).
f, including the support frame 1-2f), and the support frame 1-2f and the fixed frame 4 are connected by a rotating bayonet type.

Reference numeral 5 denotes a front cover for determining the relative angular position of the support frame 1-2f with respect to the fixed frame 4, the outer periphery of which is fitted to the fixed frame 4, and which is assembled to the fixed frame 4 by elastic deformation of the material. attached. The front cover 5 is configured to bias the thrust and radial play between the support frame 1-2f and the fixed frame 4 by elastic deformation of the material, thereby supporting the support frame 1-2f.
Is also integrated with the fixed frame 4.

Reference numeral 6 denotes a movable frame attached to a movable member (including the transparent plate 1-1m and the support frame 1-2m) of the variable apex angle prism 1. The movable frame 6 is positioned on the support frame 1-2m, and is integrated with the support frame 1-2m by using the elastic deformation of the material to offset the play in the radial and thrust directions.

Reference numerals 7a and 7b denote cross sections of the drive coil 7 which constitutes a part of the first drive means, and 7a is wound in a direction perpendicular to the plane of the drawing and 7b is wound in a direction perpendicular to the plane of the drawing and in the direction opposite to 7a. Reference numerals 8a and 8b denote cross sections of the bias coil 8 forming a part of the second driving means, and 8a is perpendicular to the plane of the drawing, and 8b in the front direction is perpendicular to the plane of the drawing and the conducting wire is wound in the direction opposite to 8a.

The drive coil 7 and the bias coil 8 are integrally formed by simultaneous winding (they may be individually wound and integrated by bonding or the like). 6 are integrally fixed.

10 is a drive coil 7 and a bias coil 8
A magnetic circuit that acts on both
The set of the magnetic circuit 10 is a first driving unit, and the set of the bias coil 8 and the magnetic circuit 10 is a second driving unit. That is, the magnetic circuit 10 is also used as the first and second driving means. ) The yokes 10-2 and 10-3 for closing the magnetic flux generated by the magnet 10-1 magnetized to two poles, and the spacer 10-4 for keeping the interval between the magnet 10-1 and the yoke 10-3. (Not shown). The yoke 10-3 has a hole in the center.

Reference numeral 11 denotes an apex angle sensor for obtaining an electric output proportional to the apex angle of the prism formed by the variable apex angle prism 1, and an infrared light emitting diode 11-fixed to the movable frame 6 by a holding member 8. 1 infrared light emitting diode 11-1
11-2 provided on the fixed frame 4 for narrowing the infrared light beam emitted by the light emitting device, and a PSD 11-3 for generating an electric signal proportional to the light receiving position of the infrared light beam narrowed by the slit 11-2.
It consists of.

FIG. 2 shows a state in which the variable apex angle prism 1 has the apex angle α of the prism. The position of the infrared light emitting diode 11-1 with respect to the slit 11-2 is displaced, and the PSD 11
The light receiving position on the light receiving surface of the PSD 11-3 is shifted by X with respect to FIG. 1 and the vertex angle α of the prism can be known from the electric output proportional to the position. By energizing the coils 7 and 8, the prism apex angle is changed by the interaction force of the magnetic flux with the magnetic circuit 10, that is, the Lorentz force.

Returning to FIG. 1 again, reference numeral 12 denotes a connecting member for connecting the fixed frame 4 and the lens barrel 2, and is screwed to the fixed frame 4. The above-described magnetic circuit 10 includes a spacer 10-4.
Is fixed by the fixed frame 4 and the connecting member 12, and is fixed at a predetermined position by being sandwiched between the two members. The PSD 11-3 also includes the fixed frame 4 and the connecting member 12.
And is fixed by screw tightening.

Next, the configuration of the image blur correction apparatus according to the present embodiment will be described with reference to FIG. 3 which is a block diagram schematically showing the configuration. 1 are denoted by the same reference numerals.

Reference numeral 1 denotes a variable apex angle prism, and reference numeral 20 denotes a photographing optical system in which the variable apex angle prism 1 is disposed at the forefront. 2
Reference numeral 1 denotes a vibrating gyroscope, which is an angular velocity sensor, whose detection axis is fixed to a fixed portion of the apparatus so as to coincide with the drive axis of the movable surface of the variable apex prism 1, and outputs a signal proportional to the angular velocity of the apparatus. I do. The angular velocity signal undergoes processing such as BPF (band pass filter) by a signal processing circuit 22 and is integrated by an integrator 23 to become an angle signal a of the device.

An apex angle sensor 11 detects the apex angle of the variable apex angle prism 1 and outputs a signal proportional to the apex angle formed by the variable apex angle prism 1. This signal is subjected to amplification, filter processing, and the like by the signal processing circuit 24 to become an apex angle signal b.

In the addition circuit 25, the angle signal a of the apparatus and the apex angle signal b of the variable apex angle prism 1 are added with opposite polarities, and a difference signal c is obtained. The difference signal c is amplified by the amplifier 26 and the signal d
The driving signal is converted into a driving signal by the driving circuit 27, and the driving coil 7 is energized to change the prism apex angle of the variable apex angle prism 1 by interaction with the magnetic circuit.

The drive circuit 27 is, for example, a push-pull circuit centered on the voltage Vc shown in FIG. In the block configuration so far, the signal c works in the direction of becoming zero, that is, the difference between the angle signal a of the apparatus and the apex angle signal b of the variable apex angle prism 1 becomes zero.

Reference numeral 28 denotes a drive signal d proportional to the voltage applied to the drive coil 7 which is a part of the first drive means.
Is an LPF (low-pass filter) that passes only the low-frequency component of the above, and the obtained signal e is proportional to the steady-state component (average value) of the voltage applied to the drive coil 7.

In the adder circuit 29, Vc, which is the reference potential of the drive circuit 27, and the signal e are added with opposite polarities, and a difference signal f is obtained. The difference signal f is amplified by the amplifier 30 and the driving circuit 31
Is converted into a drive signal, and the bias coil 8 is energized to change the vertex angle of the variable vertex angle prism 1 by interaction with a magnetic circuit.

The bias coil 8 and the drive coil 7 are controlled in a steady state (control in which the vertex angle of the variable vertex angle prism 1 becomes zero in order to change the vertex angle of the variable vertex angle prism 1 in the same direction by energization. At the center position, the difference signal f acts in a direction to become zero, that is, the voltage applied to both ends of the drive coil 7 becomes zero.

Therefore, the characteristic of the deflection angle of the variable apex angle prism with respect to the voltage applied to the drive coil 7 is represented by the curve l
_It looks like ₁ . The horizontal axis in FIG. 5 is the voltage between both ends applied to the driving coil 7, the vertical axis representing the driving load represents the deflection angle of the variable apex angle prism, and both the horizontal axis and the vertical axis have zero center lines. Represents

The variable apex angle prism 1 serving as a driven body has a halo of a bellows 1-3 connecting two surfaces, and when the apparatus is used in a horizontal state, the own weight of the internally enclosed liquid has a variable apex angle. In order to be the force of opening the prism downward,
Driving force is required to make the prism apex angle zero,
This driving force is generated by energizing the bias coil 8. Therefore, the load characteristic l ₁ of the variable apex angle prism with respect to the applied voltage of the drive coil 7 becomes substantially uniform left and right with respect to zero applied voltage as shown in FIG.
The apex angle of the variable apex angle prism can be changed by effectively using the voltage that can be applied to the drive coil 7.

The driving force (load) required to make the prism apex angle zero is changed by the rigidity change and deformation of the bellows 1-3 due to the attitude of the apparatus and the temperature and humidity. Since the bias coil 8 is driven based on the information of the low frequency component, the load on the drive coil 7 always keeps substantially uniform characteristics to the left and right with respect to the applied voltage of zero as shown in FIG. The voltage applied to the drive coil 7 at zero becomes almost zero.

The positioning of the variable apex angle prism 1 at the prism apex angle of zero, which is the control center, is performed by feedback control in which the difference signal c is amplified and applied to the drive coil 7, so that the magnitude of the difference signal c is large. That is, the difference between the angle signal a and the apex angle signal b of the device is proportional to the voltage applied to the drive coil 7.

Since the voltage applied to the drive coil 7 when the prism apex angle is zero is always controlled to be substantially zero, the difference signal c at the time when the prism apex angle is zero always has a small value regardless of the state of the apparatus. .

The vertical movement (pitching) has been described with reference to FIGS. 1, 2 and 3, but the left and right movement (yaw) has the same configuration, and is controlled independently of each other. Can be corrected.

(Second Embodiment) FIG. 6 shows a main part of a video camera having a driving device for a movable lens group of a photographing optical system according to a second embodiment of the present invention. FIG. 5 is a diagram illustrating a driving device portion of a zooming or focusing lens.

Reference numeral 101 denotes a first cylindrical lens barrel 102.
Is a lens to be moved, which is a driven body, 103
Is a moving ring holding the lens 102, and the lens 1
02 is fixed by a method such as heat caulking. Further, the moving ring 103 has bearings 103a and 103b integrally formed in a direction parallel to the optical axis and a fork-shaped receiving portion 103c formed in a substantially opposite direction.

Reference numerals 104 and 105 denote guide rods arranged in parallel with the optical axis, respectively.
3 and the guide rod 1
Numeral 05 is sandwiched between the fork-shaped receiving portions 103c of the moving ring 103, and the lens 102 is coaxial with another lens group (not shown) to guide the movement in the optical axis direction. Reference numeral 106 denotes a second lens barrel, which is positioned and connected to the first lens barrel I 101 by screwing or the like.
The guide shafts 104 and 105 are positioned and fixed in the holes of the lens barrel I101 and the lens barrel II 106, respectively.

Reference numeral 107 denotes a cylindrical coil bobbin formed substantially coaxially with the optical axis in front of the movable ring 103. The coil bobbin 107 includes a driving coil which forms a part of the first driving means, a driving coil 108 and a second driving coil. A bias coil 109 forming a part of the driving means is wound around the optical axis.

Reference numeral 110 denotes a cylindrical magnet which is magnetized toward the center in the radial direction. Reference numeral 111 denotes a yoke for closing the magnetic flux generated by the magnet 110. The cylindrical portion 111a and 111c and the donut-shaped disk portion 111b are integrally formed of a metal material having good magnetic permeability. It is fixed to the cylinder 106.

With this configuration, the drive coil 108 and the bias coil 109 which form a part of the first and second drive means and form a magnetic circuit shared by both of them.
Are arranged in a gap in a magnetic circuit formed by the magnet 110 and the yoke 111, so that when a voltage is applied, a force in the optical axis direction is received by magnetic interaction,
The lens 102 can be moved in the optical axis direction along the guides of the guide rods 104 and 105.

The load of the moving body, which is the driven body, is the friction between the mass of the moving body and the guide rod, the viscosity of oil, gravity, and the like.
The force required to hold the lens at a certain position varies depending on the orientation of the lens (for example, upward and downward), and the direction in which gravity acts changes.

Next, the position control of the lens will be described with reference to FIG. 7 showing the outline of the configuration of the apparatus of this embodiment. The same parts as those shown in FIG. 6 are denoted by the same reference numerals.

100 is a lens moving mechanism which is a driven body;
Reference numeral 121 denotes a position sensor for detecting the position of the lens 102, which can obtain an electric output according to the position of, for example, a slide volume. Reference numeral 122 denotes a microcomputer, and the output of the position sensor 121 is taken into the microcomputer via an A / D converter. In the microcomputer, the difference between the current lens position signal and the target position is calculated, amplification or filtering is performed, and the driving signal a is output via the D / A converter.

Reference numeral 123 denotes a drive circuit as shown in FIG. 4, for example, which applies a drive voltage to the drive coil 108. When the drive coil 108 is energized, the lens 102 is driven by the interaction with the magnetic circuit. In the block configuration up to this point, a feedback harp is formed in which the lens is driven in a direction in which the difference between the position of the lens calculated in the microcomputer and the target position becomes zero.

Reference numeral 124 denotes an LPF (low-pass filter) for passing only a low-frequency component of the drive signal a, which is proportional to the voltage applied to the drive coil, which is the first drive means. It is proportional to the steady component (average value) of the voltage applied to the coil 108. In the addition circuit 125, Vc, which is the reference potential of the drive circuit 123, and the signal b are added with opposite polarities, and a difference signal c is obtained. The difference signal c is amplified by the amplifier 126, converted into a drive signal by the drive circuit 127, and energized to the bias coil 109, whereby a drive force is applied to the lens by interaction with the magnetic circuit.

Bias coil 109 and drive coil 108
Means that a driving force is generated in the same direction by energization, so a steady state (a state where the lens is stopped at a certain target position)
Then, the difference signal c acts in the direction of becoming zero, that is, the voltage applied to both ends of the drive coil 108 acts to be zero.
9, the moving body can be driven using the entire range of the voltage range that can be applied by the drive coil 108.

The actual position of the lens is calculated in the microcomputer. The difference between the lens position and the target position is amplified and applied to the drive coil 108 for control. Regardless, the fact that the voltage applied to both ends of the drive coil 108 becomes zero when the lens is stopped means that the lens position error when the lens is stopped can be reduced.

(Third Embodiment) FIG. 8 is a main part configuration diagram showing a drive unit of a zooming or focusing lens of a video camera as a third embodiment of the present invention.

Reference numeral 201 denotes a disc-shaped first lens barrel;
2 is a lens to be moved, which is a driven body, 203
Is a moving ring holding the lens 202, and the lens 2
02 is fixed by a method such as heat caulking. Further, the movable ring 203 has bearings 203a and 203b integrally formed in a direction parallel to the optical axis and a fork-shaped receiving portion 203c formed in a substantially opposite direction.

Reference numerals 204 and 205 denote guide rods arranged in parallel with the optical axis, respectively.
3a and 203b, the guide rod 205 is sandwiched between the fork-shaped receiving portions 203c of the movable ring 203, and the lens 202 guides the movement in the optical axis direction coaxially with another lens group (not shown). .

Reference numeral 206 denotes a second lens barrel. Guide rods 204 and 205, which are positioned with respect to the first lens barrel 201 and are connected by screwing or the like, respectively, are provided for the barrel I 201 and the barrel II 206, respectively. It is positioned and fixed in the hole.

Reference numeral 207 denotes a step motor as first driving means fixed to the first lens barrel I 201, and 207 a denotes a lead screw formed on the output shaft of the step motor 207. It is supported by a bearing provided in the second lens barrel 206. or,
The movable ring 203 has a resilient lead screw 20.
When the lead screw 207a rotates, the moving ring 203 is moved in the direction of the optical axis.

Reference numeral 208 denotes a cylindrical coil bobbin formed substantially coaxially with the optical axis in front of the moving ring 203. The coil bobbin 208 is provided with a bias coil 209 forming a part of the second driving means. It is wound around.

A cylindrical magnet 210 is magnetized toward the center in the radial direction. 211 is a yoke for closing the magnetic flux generated by the magnet 210,
Cylindrical portions 211a and 211 and a donut-shaped disk portion 21
1b is integrally formed of a metal material having good magnetic permeability, and is fixed to the lens barrel II 206. With this configuration, a magnetic circuit forming a part of the second driving means is formed.

The bias coil 209 is a magnet 210
The yoke 211 is arranged in a gap in a magnetic circuit, so that when a voltage is applied, a force in the optical axis direction acts on the lens 202 by magnetic interaction.

Next, the position control of the lens will be described with reference to FIG. 9 showing the outline of the structure of the apparatus of this embodiment. The same parts as those shown in FIG. 8 are denoted by the same reference numerals.

Reference numeral 200 denotes a lens moving mechanism which is a driven body;
Reference numeral 221 denotes a reset switch for detecting a reference position of the lens 202. For example, a position where a photo interrupter in which an infrared light emitting diode and a phototransistor are opposed to each other with a space therebetween is obliquely illuminated by a part of the moving ring 203 is set as a reference position. It is something like

Reference numeral 222 denotes a microcomputer for controlling the position of the lens. The microcomputer 222 receives the output of the reset switch 221 from the input port and outputs a drive signal to the first and second driving means with respect to the reference position to control the lens position. . An attitude sensor 223 detects the attitude of the lens, and outputs an output corresponding to the attitude of the lens to the microcomputer 222 via an A / D converter.
Incorporated in.

Reference numeral 224 denotes a drive circuit for the step motor 207, which is output from an output port of the microcomputer 222.
The signal of the rotation direction of the step motor and the number of steps are converted, and the step motor 207 is rotated to move the lens 202 to a desired position. 225 is a bias coil 209
The drive circuit 225, which is a push-pull circuit as shown in FIG.
A drive signal for the bias coil 209 is output via the A converter. Here, the bias coil 209 is the attitude sensor 2
23, controlled by the microcomputer 222,
When the lens is upward, the voltage is ignited in the direction in which an upward force is generated on the moving body, canceling the force due to gravity, and canceling the load due to gravity on the stepping motor, which is the first driving means. . That is, the stepping motor, which is the first driving means for positioning the lens, can drive the lens with the maximum force obtained by the predetermined applied voltage in both directions before and after the optical axis regardless of the posture of the lens. is there. In addition, the stepping motor has a property that the stop position accuracy is deteriorated when the load acting on the motor is large. Good stopping accuracy of the lens position can also be obtained depending on the posture.

The above is the configuration of each embodiment. However, the present invention is not limited to the configuration of each embodiment, and any configuration can be achieved as long as the functions described in each claim can be achieved. Needless to say, it may be something.

In the present invention, the embodiments or their technical elements may be combined as needed.

The present invention also relates to a case where the whole or a part of the configuration of the claim or the embodiment forms one device or is combined with another device. It may be such as an element constituting a device.

According to the present invention, an angular accelerometer, an accelerometer, an angular velocimeter, a speedometer, an angular displacement meter, a displacement meter,
Further, any method may be used as long as the shake can be detected, such as a method of detecting the shake itself of the image.

According to the present invention, as a shake preventing means, a light beam changing means such as a shift optical system or a variable-length prism for moving an optical member in a plane perpendicular to the optical axis, or a photographing plane in a plane perpendicular to the optical axis is used. Any object may be used as long as it can prevent shake, such as a moving object, and a device that corrects 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 cameras, and further to such cameras, optical devices and other devices. The present invention can be also applied to the devices that are used or the components that make up these devices.

[0065]

As described above, according to the present invention,
The driven body can be driven with high accuracy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a first embodiment.

FIG. 2 is a sectional view of the variable apex angle prism of the first embodiment in an inclined state.

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

FIG. 4 is a drive circuit according to the first embodiment.

FIG. 5 is a diagram illustrating a load of a driven body on a first driving unit of the first embodiment.

FIG. 6 is a sectional view of a main part of the second embodiment.

FIG. 7 is a control block diagram of a second embodiment.

FIG. 8 is a main sectional view of the third embodiment.

FIG. 9 is a control block diagram of a third embodiment.

FIG. 10 is a diagram illustrating a load of a driven body in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Variable vertex angle prism 2 Lens barrel 4 Fixed frame 5 Front cover 6 Movable frame 7 Drive coil 8 Bias coil 10 Magnetic circuit 11 Vertex angle sensor

Claims (3)

[Claims] 1. A first method for driving a driven body having a load for driving that varies depending on the state of a device in one degree of freedom of driving.
A driving device having a second driving means. 2. The apparatus according to claim 1, wherein the first driving means performs positioning of the driven body, and the second driving means is controlled so as to cancel an offset component of a load of the driven body which changes depending on a state of the device. The drive device according to claim 1, wherein 3. The driving device according to claim 1, wherein the first and second driving units drive a movable member that moves to prevent image blur.