JP2010008696A - Optical equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that an image blur correction mechanism is damaged if optical equipment is dropped or shocked in a use state thereof. <P>SOLUTION: When detecting abnormality of acceleration applied to the optical equipment in the use state thereof, a movable part is retracted outside of a correction range used when correcting image blur. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical apparatus having an image blur correction mechanism.

  In recent years, many optical devices (such as cameras) equipped with an image blur correction device have been proposed. However, there is a problem that when the optical apparatus is used, the image blur correction apparatus may be damaged if the apparatus is dropped or given an impact.

As a means to prevent damage to the image blur correction device, an invention is proposed in which the blur correction element is retracted outside the range used for image blur correction in a non-use state, thereby stably maintaining the optical element for image blur correction. (Patent Document 1). However, the invention described in Patent Document 1 cannot prevent breakage in use.
JP 2007-128055 A

  An object of the present invention is to provide an optical device that can prevent the image blur correction mechanism from being damaged even when it is subjected to an impact due to dropping or the like when the optical device is used.

  Therefore, the present invention holds an image blur correction lens, a movable member that holds the image blur correction lens and is movable in a direction perpendicular to the optical axis, and restricts movement of the movable member in the optical axis direction. And at least three balls that are sandwiched between the movable member and the fixed member and are movable relative to each of the movable member and the fixed member in a direction perpendicular to the optical axis, Controlling the relative movement of the ball within a restricted range, controlling at least three restricting portions provided on the movable member or the fixed member, driving means for driving the movable member, and driving of the driving means Control means, and the movable member is moved in a direction perpendicular to the optical axis in a state where the ball is located inside the limit range and within a correction range narrower than the limit range. Letting Therefore, an optical apparatus capable of performing image blur correction, and having an abnormality detection means for outputting an abnormality detection signal to the control means when detecting an abnormality in acceleration applied to the optical apparatus in the usage state of the optical apparatus. When the abnormality detection signal is input, the control unit drives the driving unit so that the ball is in the retracted position within the limit range and out of the correction range. It is an optical apparatus characterized by moving.

  According to the present invention, when an abnormality in the acceleration applied to the optical device is detected in the use state of the optical device, the movable portion is retracted outside the correction range used at the time of image blur correction, thereby preventing the image blur correction mechanism from being damaged. be able to.

  Hereinafter, the best mode for carrying out the present invention will be described.

(Configuration of camera device)
FIG. 2 is a configuration diagram in a case where the present invention is applied to a camera apparatus having a four-group variable magnification optical system having convex and concave projections.

  In FIG. 2, L1 is a fixed first lens group, L2 is a second lens group that performs a zooming operation by moving in the optical axis direction, and L3 is moved in a plane perpendicular to the optical axis to perform image blur correction operation. The third lens group L4 performs the focusing operation by moving in the optical axis direction.

  Reference numeral 2 denotes a moving frame that holds the second lens unit L2, 3 denotes a shift unit that enables the third lens unit L3 to move within a plane perpendicular to the optical axis, and 4 denotes a moving frame that holds the fourth lens unit L4. .

  The microcomputer 42 takes in a large number of signals and processes them. In addition, a large number of signals are output according to the input signal, and the camera is controlled. The imaging means 40 converts incident light into a photographing signal and outputs the photographing signal to the camera signal processing circuit 41. The camera signal processing circuit 41 outputs a signal to the microcomputer 42 after performing predetermined amplification and gamma correction on the photographing signal. Note that a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device) can be used as the imaging means.

  The aperture device 9 for changing the aperture diameter of the optical system is a so-called guillotine aperture device in which the aperture diameter is changed by moving two aperture blades in opposite directions by the aperture drive means 9a. An aperture sensor 44 detects the rotational position of the drive magnet of the aperture device 9 with a Hall element.

  The microcomputer 42 outputs an aperture driving signal to the aperture driving means 9a in accordance with an input signal from the camera signal processing circuit 41 and an input signal such as the rotation amount of the aperture driving unit from the aperture sensor 44, and adjusts the light amount. . Further, as will be described in detail later, a signal for driving the third lens unit L3 is output by passing a current through the image blur correction drive circuit 47. Similarly, when a current is passed through the fourth lens group driving circuit 45, a signal for driving the fourth lens group L4 is output. The third lens group L3 and the fourth lens group L4 are driven by a motor that obtains a driving force by passing a current through the coil. The recording means 43 records the image signal processed by the microcomputer 42 and recording conditions.

  An angular acceleration sensor 48 that detects angular acceleration by using a vibration gyro sensor, an inertial gyro sensor, a plurality of acceleration sensors, and the like outputs angular acceleration information to the microcomputer 42. Based on the obtained angular acceleration information, it is possible to detect the posture of the camera, camera shake, and the like, as will be described later.

  The acceleration sensor 49 outputs information on acceleration applied to the camera to the microcomputer 42 when the camera is in use. The microcomputer 42 determines the posture of the camera based on the acceleration information of the acceleration sensor 49, and makes a determination of normal position shooting or vertical position shooting. Further, when an abnormal acceleration is applied to the camera in the camera use state, the acceleration sensor 49 detects the abnormality of the acceleration and outputs it to the microcomputer 42. In addition, as an acceleration sensor of this invention, what was described in Unexamined-Japanese-Patent No. 2005-30937 etc. can be used, for example. The acceleration sensor described in the above document has three axes, but two axes and one axis may be combined to form three axes, or three single axes may be used to form three axes.

  Further, by detecting an abnormality in acceleration from the driving states of both the image blur correction drive circuit 47 and the fourth lens group drive circuit 45, the acceleration sensor 49 can be substituted. That is, when the optical axis of the camera is held in a substantially horizontal direction with respect to the ground, the third lens unit L3 is forced downward by its own weight, but the third lens unit L3 has a mechanism for holding the optical axis. Therefore, a holding current flows through the image blur correction drive circuit 47 in order to hold the optical axis. On the other hand, since the fourth lens unit L4 does not move by the force of its own weight, the holding electric energy does not flow through the fourth lens unit driving circuit 45. When the optical axis of the camera is held in a direction substantially perpendicular to the ground, the third lens unit L3 is not subjected to a force that shifts the lens optical axis due to its own weight, so that no holding current flows through the image blur correction drive circuit 47. Since the fourth lens group L4 does not have a holding mechanism in the optical axis direction, a holding current flows through the fourth lens group driving circuit 45.

  When the optical device is in the fall state, the third lens group L3 and the fourth lens group L4 are not subjected to their own weight, so the holding currents flowing through the image blur correction drive circuit 47 and the fourth lens group drive circuit 45 are both substantially zero. . Therefore, when the state in which the holding currents of both the image blur correction drive circuit 47 and the fourth lens group drive circuit 45 flow only at a value smaller than a predetermined value is longer than the predetermined time, it is determined that the camera has fallen. Thus, the sensor can detect a fall. In addition, what is necessary is just to set the predetermined value in consideration of the slight holding current and error which flow at the time of dropping. Also, for example, if it is desired to detect a fall from a height of 50 cm or more as a fall, a predetermined time may be set to 0.22 seconds (a time until a 50 cm drop hits the ground). .

  Note that the acceleration sensor 49 can detect vertical, horizontal, and longitudinal acceleration applied to the camera by using a triaxial acceleration sensor or a plurality of acceleration sensors.

  Reference numeral 50 denotes a zoom switch for instructing a zooming operation. Reference numeral 51 denotes a focus switch for instructing a focus operation. 52 is a power switch.

  The zoom motor 10 is a driving means for moving the second lens unit L2 in the optical axis direction to perform a zooming operation.

  The photo interrupter 11 is a second lens group initial position sensor for detecting the reference position of the second lens group L2. When the power switch 52 is turned on, the zoom motor 10 detects the initial position by the photo interrupter 11 based on a signal from the microcomputer 42, and the position control corresponding to the operation of the zoom switch 50 is performed by the number of steps from that position.

  The fourth lens group position sensor 54 includes an optical scale (not shown) and an optical sensor (not shown). The optical sensor has a light emitting unit and a sensor for measuring the amount of light reflected from the optical scale by the light emitting unit. The optical scale and the optical sensor detect the amount of reflected light from the optical scale. It is arranged at a position facing each other with a predetermined interval necessary for this.

  The microcomputer 42 outputs a drive signal to the fourth lens group drive circuit 45 in response to an input signal from the fourth lens group position sensor 54 and a signal from the focus switch 51 and the like. The fourth lens group driving circuit 45 drives the fourth lens group L4 in the optical axis direction according to an input signal from the microcomputer 42.

(Configuration of image blur correction device)
Next, in the present invention, the configuration of the shift unit 3 which is a main part of image blur correction will be described with reference to FIG. FIG. 3 is an exploded perspective view showing the structure of the shift unit of the present invention.

  The third lens unit L3 is guided to a guide mechanism (described later) in a plane perpendicular to the optical axis in a vertical direction for correcting image blur in the pitch direction and in a horizontal direction for correcting image blur in the yaw direction. It is positioned at an arbitrary position around the optical axis while being regulated. Note that the pitch direction means a change in angle in the vertical direction of the camera, and the yaw direction means a change in angle in the horizontal direction of the camera.

  The shift barrel (holding member) 21 is a movable member that holds the third lens unit L3. A shift base (support substrate) 19 serving as a base of a fixed portion of the shift unit 3 is a front-side fixed member that restricts the movable member in the optical axis direction. The sensor base 23 is a rear-side fixing member, the position of which is determined by two positioning pins, and is coupled to the shift base 19 with two screws.

  Reference numerals 22 a, 22 b, and 22 c denote three balls held between the shift base 19 and the shift lens barrel 21. The three balls are preferably made of, for example, SUS304 (austenitic stainless steel) so as not to be attracted to a driving magnet, which will be described later, disposed in the vicinity.

  The surfaces on which the balls 22a, 22b and 22c are in contact are 19a, 19b and 19c on the shift base 19 side, and 21a, 21b and 21c on the shift lens barrel 21 side, respectively. Each abutment surface is perpendicular to the optical axis of the optical system, and when the three balls have the same outer diameter, the shift lens has a small difference between the positions of the respective surfaces in the optical axis direction. Holding and moving guidance can be performed while keeping the group L3 perpendicular to the optical axis.

  The compression coil spring 20 is an urging means that urges the shift barrel 21 to the shift base 19 with the three balls 22a, 22b, and 22c interposed therebetween, and is compressed between the shift barrel 21 and the sensor base 23. is set up. One end of the compression coil spring 20 is fitted in the shift barrel 21 substantially coaxially with the optical axis of the third lens unit L3. The other end is fitted to the sensor base 23 substantially coaxially with the optical axis of the lens, and is adhered to the sensor base 23 so that the angular position of the shift barrel 21 positioned at the other end is a normal position. It is fixed with. Lubricating oil having such a viscosity that the balls do not easily fall off the contact surfaces even when the balls are not sandwiched between the shift base 19 and the shift lens barrel 21 is applied between the three balls and the respective contact surfaces. Has been. As a result, it is possible to prevent the position of the ball from easily shifting even if the inertial force exceeding the urging force is applied to the shift barrel 21 and the ball is not clamped. As a material of the compression coil spring 20, a material that is not attracted to a detection magnet and a drive magnet, which will be described later, is suitable. Therefore, a phosphor bronze wire or the like is suitable.

  Next, driving means for the third lens unit L3 will be described. Although the driving means are provided in the vertical direction and the horizontal direction, since each has the same configuration with an angle of 90 degrees, only the vertical direction will be described here. Further, in the following, the numbers indicating the parts in the figure are represented by attaching a suffix p to the vertical component and y to the horizontal component.

  The driving means of the third lens unit L3 includes a driving magnet 24p magnetized in two radial directions with respect to the optical axis, a yoke 25p for closing the magnetic flux on the front side in the optical axis direction of the driving magnet 24p, and driving. It comprises a yoke 27 and a coil 26p for closing the magnetic flux on the rear side of the magnet 24p in the optical axis direction. The coil 26p is bonded and fixed to the shift barrel 21. The yoke 27 is fixed to the shift base 19 by the magnetic force of the magnet so as to form a space in which the coil 26p moves with respect to the driving magnet 24p, and constitutes a magnetic circuit.

  When a current is passed through the coil 26p, a Lorentz force is generated due to repulsion between the magnetic lines generated in the magnet 24p and the coil 26p in a direction substantially perpendicular to the magnetization boundary of the two-pole magnetization of the driving magnet 24p. The lens barrel 21 can be moved. That is, it is a moving coil type driving means. Thereby, the third lens unit L3 held by the shift barrel 21 can be moved. In addition, since the said structure is arrange | positioned in the vertical and horizontal direction, the shift lens barrel 21 can be driven to two directions substantially orthogonal.

  Next, the image blur correction position sensor 46 will be described.

  In FIG. 3, 28p and 28y are magnets for detection magnetized in two poles in the radial direction with respect to the optical axis. Reference numerals 29p and 29y denote yokes for closing the magnetic fluxes on the front side in the optical axis direction of the detection magnets 28p and 28y, and both are fixed to the shift barrel 21. Reference numerals 30p and 30y denote Hall elements that convert magnetic flux density into electric signals, and are positioned and fixed to the sensor base 23. With the above configuration, each image blur correction position sensor 46 in the pitch direction and yaw direction of the shift barrel 21 is formed. The microcomputer 42 controls the drive of the above-described driving unit independently in the vertical direction and the horizontal direction based on the signal from the image blur correction position sensor 46.

(Guiding mechanism)
Next, details of the guide mechanism will be described with reference to FIGS. In the following, the ball 22b will be described, but the balls 22a and 22c have the same relationship.

  In FIG. 4A, the shift barrel 21 is in the center position (the lens group L3 coincides with the optical axis of the other lens group), and the ball 22b is also centered within the limit range of the restricting portion 21d. It is a figure which shows the state located in. The restricting portion 21d is provided around the contact surface 19b of the shift base 19 and restricts the movement of the ball 22b.

  FIG. 4B shows a state in which the shift barrel 21 is driven by the driving means in the downward arrow direction from the state shown in FIG. The shift barrel 21 is driven to a movable machine end (hereinafter abbreviated as a machine end) provided at another location, and is moved by a from the center position. As described above, since the ball 22b is held between the shift base 19 and the shift barrel 21, it rolls in the direction of the arrow in FIG. 4A and moves to the position in FIG. 4B. Since the rolling friction is sufficiently smaller than the sliding friction, the shift lens barrel 21 moves relative to the shift base 19 by the rolling of the ball without slipping between the ball and the contact surface. At this time, since the shift barrel 21 and the shift base 19 are moved in the opposite directions relative to the center of the ball, the movement amount b of the ball relative to the shift base 19 is equal to the movement amount a of the shift barrel 21. As shown in FIG. 4B, the movement amount b is half of a (a ÷ 2).

  FIG. 4C is a view of the shift base 19 and the ball 22b when FIG. 4A is viewed from the shift lens barrel 21 side, and the ball 22b is located at the center of the restricted range in the vertical and horizontal directions. Around the ball 22b, a restricting portion 21d forms a rectangular restriction range (the end of this restriction range is hereinafter abbreviated as a restriction end). The size of the limit end is represented by (r + b + c) from the center, where r is the radius of the ball. Note that c is a mechanical margin.

  Here, when the ball 22b is at a position deviated by c or more from the center of the limit range, when the shift barrel 21 is driven as shown in FIG. 5B, the ball is moved before the shift barrel 21 hits the machine end. 22b hits the limit end. Even if it is driven further, the shift barrel 21 slides with the ball 22b and is driven to the machine end while pressing the ball 22b against the limit end. If the shift barrel 21 is further returned to the center position from this state, the ball 22b rolls back to the distance c from the center of the control range.

  As described above, when the shift barrel 21 is driven to the machine end on both sides in the vertical and horizontal directions and returned to the center position, as shown in FIG. 5D, the ball 22b is initially in any position. In addition, the center position is positioned within a rectangle having a distance c from the center of the limit range. This series of operations is called a ball reset operation.

  The restricted range of ball movement may be provided as follows, for example. First, a quadrangle having four substantially parallel sides is provided in two substantially orthogonal directions in which the driving means generates a force. And this quadrilateral has a gap between the ball and the other side that is created when the ball is moved to two sides. The maximum mechanical movement in the same direction of the movable member or the maximum movement of the movable member during actual use. Try to be larger than half of the amount. In addition, the areas of the surfaces 19a, 19b, 19c and 21a, 21b, 21c that contact the balls of the shift base 19 and the shift lens barrel 21 are minimized. If the ball movement limit range is determined as described above, even if the ball is reset, the ball does not fall within the limit range in actual use, and the shift barrel 21 can be supported and guided only by rolling the ball. A possible configuration.

  The limit range of the ball movement may be any shape as long as the position of the ball can be correctly reset to the position where the ball does not hit the limit end in the actual use state by the ball reset operation. It may be square or circular.

  In addition, as described above, by applying lubricating oil between the ball and each contact surface, the sliding frictional force between the ball and the contact surface can be reduced to reduce the influence on the position control. I can do it.

  In this embodiment, the restricting portion 21d for restricting the movement of the ball is provided on the shift base 19, but it may be provided on the shift lens barrel side. Further, although an example using three balls has been shown, it is possible to use more balls.

(Image blur correction operation)
Next, the image blur correction operation by the shift unit 3 described above will be described.

  First, when the angular acceleration sensor 48 that detects angular acceleration detects camera shake, it outputs angular acceleration information to the microcomputer 42. The microcomputer 42 calculates the amount of movement of the image blur correction lens group L3 according to the change in the angle of the camera from the input angular acceleration information. Further, an input signal from the image blur correction position sensor 46 and a drive signal corresponding to the calculated movement amount are output to the image blur correction drive circuit 47, and the third lens unit L3 is driven in a direction orthogonal to the optical axis. Reduce image blur.

(Retraction operation of the shift barrel)
Next, the retracting operation of the shift barrel 21 when an abnormal acceleration is applied to the camera in the use state of the camera will be described with reference to FIG.

  When the acceleration sensor 49 detects abnormal acceleration, an abnormality detection signal is output to the microcomputer 42. When the microcomputer 42 receives the abnormality detection signal, the microcomputer 42 drives the shift barrel 21 so that the ball 22 is positioned at a retracted position outside the range used for image blur correction. The driving means of the shift barrel 21 is as described above. FIG. 1 shows a state in which the shift barrel 21 is at the center position and a state in which the shift barrel 21 is retracted to the retracted position. By retracting to the retracted position, even if the impact is caused by dropping or the like, image blur correction is performed among the surfaces 22a, 22b, and 22c that contact the shift base 19 and the ball and the surfaces 21a, 21b, and 21c that contact the shift barrel 21. It is possible to prevent dents and scratches from being made in the range used when performing. Note that the retracted position may be outside the range used for image blur correction, and is not limited to one place, and a plurality of places can be provided. For example, the movable machine end of the shift barrel 21 can be used.

When a state of falling in a direction perpendicular to the lens optical axis is detected, the shift barrel 21 of the shift unit 3 is moved to the machine end on the lower side in the dropping direction, and the machine end on the lower side in the dropping direction is moved. It can be made hard to break by receiving. In addition, when detecting a state of dropping substantially in the direction of the optical axis of the lens, the shift barrel 21 is moved to the shortest position of the machine end, so that it can reach the machine end even when the fall speed is high, and is damaged. Can be difficult. At this time,
Information on how the camera is falling can be obtained from the angular acceleration information detected by the angular acceleration sensor 48.

(Evacuation procedure)
Next, an example of a procedure for retracting the shift barrel 21 in the shift unit 3 when an abnormal acceleration is applied to the camera will be described with reference to FIG. FIG. 5 is a flowchart showing an example of the procedure for the retraction control of the shift barrel in the present invention.

  First, in step 1, the evacuation operation is started.

  In step 2, the save selection means 53 selects whether or not to perform a save operation. This is in order to avoid a situation where it is determined that the vehicle is in a gravity-free state at the time of shooting and falls or is abnormally accelerated and cannot be shot. When the evacuation selection means 53 is OFF, the process returns to step 2. When the evacuation selection means is ON, the process proceeds to step 3.

  In step 3, it is detected whether the output value of the acceleration sensor 49 is equal to or less than a predetermined first predetermined value or equal to or greater than a second predetermined value. When it is less than or equal to the first predetermined value, gravitational acceleration is not applied or is low, and there is a possibility of falling. Since there is a high possibility of collision with the ground or floor after dropping, the shift barrel 21 needs to be retracted. In addition, when the acceleration is equal to or higher than the second predetermined value, a state where it is shaken greatly with a strap can be considered. There is a high possibility that it will collide with another object after it is shaken greatly, so it is necessary to evacuate as before. Therefore, when the output value of the acceleration sensor 49 is not more than the first predetermined value or not less than the second predetermined value, the process proceeds to step 4. When the output value of the acceleration sensor 49 is not less than the first predetermined value or not greater than the second predetermined value, the process returns to Step 2.

  In addition, about each predetermined value, it can provide suitably. For example, if a value of 1/10 G or less is output when falling, the first predetermined value may be 1/10 G. Further, if a value of 2G or more is output when the camera is shaken largely, the second predetermined value may be set to 2G.

  In step 4, it is detected whether or not the output value of the acceleration sensor 49 continues for a first predetermined time during a state where the output value is equal to or lower than the first predetermined value, or for a second predetermined time during a state where the output value exceeds the second predetermined value. . This is because the output value of the acceleration sensor 49 may decrease or increase only for a short time due to vibration or the like, which may cause malfunction. In other words, malfunction is reduced by detecting that the first predetermined time or the second predetermined time is continued and then proceeding to the next step 5. If the first predetermined time or the second predetermined time is not continued, the process returns to step 2.

  Each predetermined time can be appropriately set depending on the strength of the camera device against an impact. For example, if it is desired to detect a fall from a height of 50 cm or more as a fall, the first predetermined time may be set to 0.22 seconds (the time until a 50 cm drop hits the ground).

  In step 5, the shift barrel 21 of the shift unit 3 is retracted to the retracted position. The evacuation operation is as described above. Proceed to step 6 after the operation of step 5 is completed.

  Step 6 determines whether or not the output value of the acceleration sensor 49 is equal to or less than a predetermined third predetermined value for a third predetermined time, or equal to or greater than a fourth predetermined value for a fourth predetermined time. To detect. In this case, there is a high possibility that the impact will increase, and there is a high possibility that the lens barrel and the optical apparatus will be greatly damaged. Otherwise, go to step 8.

  It should be noted that the third predetermined value and the fourth predetermined value can be provided as appropriate, similarly to the first predetermined value and the second predetermined value. For example, if a 5G value is output when the camera is swung further than before, the fourth predetermined value may be 5G. If it is desired to perform the operation of turning off the power simultaneously with the retracting operation of the shift lens barrel 21, the second predetermined value and the fourth predetermined value may be set to the same value.

  If it has become more than the fifth predetermined value within a predetermined time, it is possible that an abnormal acceleration is applied to the camera due to an impact such as a drop, and it is highly possible that the camera has failed. The power is turned off and the power is turned off. On the other hand, if the output value of the acceleration sensor 49 has not exceeded the fifth predetermined value within a predetermined time, it is unlikely that the optical device has failed. Thus, the shift barrel 21 is returned to the original position.

  Note that the fifth predetermined value can be provided as appropriate. For example, if the value output by the acceleration sensor 49 when receiving an impact due to dropping is 10G, the value may be set to 10G.

  The camera apparatus has been described as an example of the optical apparatus of the present invention, but the present invention can also be applied to other imaging apparatuses, lens barrels, binoculars, telescopes, microscopes, and other optical apparatuses.

The schematic diagram of the shift unit which shows the state which retracted the shift barrel of this invention to the retracted position The figure which shows the structure of the camera of this invention The disassembled perspective view which shows the structure of the shift unit of this invention The figure for demonstrating the guide mechanism of this invention Flowchart of shift barrel retract control in the present invention

Explanation of symbols

L3 Third lens group 3 Shift unit 19 Shift base 19b Contact surface of ball and shift base 20 Compression coil spring 21 Shift lens barrel 21b Contact surface of ball and shift lens 21d Restricting portion 22 Ball 23 Sensor base 24 Driving magnet 25 27, 29 Yoke 26 Coil 28 Magnet for detection 30 Hall element 42 Microcomputer 48 Angular acceleration sensor 49 Acceleration sensor 52 Power switch

Claims (7)

  An image blur correction lens, a movable member that holds the image blur correction lens and is movable in a direction perpendicular to the optical axis, and a fixed member for restricting movement of the movable member in the optical axis direction; , At least three balls that are sandwiched between the movable member and the fixed member and are movable relative to the movable member and the fixed member in a direction perpendicular to the optical axis, and relative movement of the balls. There are at least three restricting portions provided on the movable member or the fixed member that are restricted within a restriction range, a drive unit that drives the movable member, and a control unit that controls the drive of the drive unit. And moving the movable member in a direction perpendicular to the optical axis in a state where the ball is located inside the correction range and within a correction range narrower than the limit range. Supplement An abnormality detecting means for outputting an abnormality detection signal to the control means when detecting an abnormality in acceleration applied to the optical equipment in a use state of the optical equipment, and the control means When the abnormality detection signal is input, by driving the driving means, the movable member is moved so that the ball is within the limit range and is outside the correction range. Optical equipment characterized by.   The optical apparatus according to claim 1, wherein the retracted position is a position where the ball and the restricting portion come into contact with each other.   The optical device according to claim 1 or 2, further comprising posture detection means for detecting and outputting posture information of the optical device, wherein the retracted position varies depending on an output of the posture detection means. The optical apparatus according to claim 1 or 2.   The abnormality detecting means is composed of an acceleration sensor, and the output value of the acceleration sensor is not more than a first predetermined value for a first predetermined time, or more than a second predetermined value for a second predetermined time. 4. The optical apparatus according to claim 1, wherein the movable member is moved to the retracted position.   When the output value of the acceleration sensor is equal to or less than a third predetermined value for a third predetermined time, or when the output value is equal to or greater than a fourth predetermined value for a fourth predetermined time, The optical apparatus according to claim 4, wherein:   The output value of the acceleration sensor is not less than or equal to the third predetermined value for the third predetermined time and not greater than or equal to the fourth predetermined value for the fourth predetermined time; If the output value of the acceleration sensor has never exceeded the fifth predetermined value within a predetermined time, the movable member retracted to the retracted position by the driving means is returned from the retracted position. The optical apparatus according to claim 5, wherein:   4. The optical apparatus according to claim 1, wherein a focusing lens group that performs a focusing operation by moving in an optical axis direction, and a focusing lens group that drives the focusing lens group. 5. The image blur correction driving means is constituted by a motor that drives the movable member by passing a current through the coil, and the motor coil constituting the image blur correction driving means is When the optical axis of the optical device is held in a substantially horizontal direction with respect to the ground, the holding current is held so as to hold the optical axis of the image blur correction lens with respect to the weight of the image blur correction lens. When the optical axis of the optical device is held in a direction substantially perpendicular to the ground, the holding current does not flow, and the focusing lens group driving means allows the current to flow through the coil. To drive the focusing lens group When the optical axis of the optical device is held in the vertical direction, the coil of the motor that is constituted by a motor and that constitutes the focusing lens group driving unit is adapted to the weight of the focusing lens group. The holding current flows so as to hold the optical axis of the focusing lens group, and the holding current does not flow when the optical axis of the optical device is held in a horizontal direction, The holding current flowing in the motor coil constituting the image blur correction driving means and the holding current flowing in the motor coil constituting the focusing lens group driving means are detected, and both the holding currents are determined from a predetermined value. 4. The optical apparatus according to claim 1, further comprising: a unit that determines that an abnormal acceleration is applied to the optical apparatus when the smaller state is longer than a predetermined time. 5.

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