JP6628550B2 - Lens barrel and imaging device - Google Patents

Description

  The present invention relates to a lens barrel that includes an anti-vibration lens unit and is stored in a main body of an imaging apparatus.

  In order to reduce image blur due to camera shake such as camera shake, an image pickup apparatus such as a digital camera moves an image stabilizing lens in a direction in which an optical axis extends (hereinafter, referred to as an optical axis direction) based on a camera shake detection result. Some have an optical image stabilizing function of shifting in a direction perpendicular to the direction.

  On the other hand, a lens barrel used in an imaging apparatus includes a retractable (collapsed) lens barrel that is stored in the main body of the imaging apparatus from a state protruding from the main body. Further, some of such retractable lens barrels have a lens retractable storage function in order to reduce the length in the optical axis direction in the retracted state, that is, to make the imaging device thinner. is there.

  The lens retracting and retracting function is to retract a part of the plurality of lenses in the lens barrel in a direction perpendicular to the optical axis from the optical axis during the retracting operation of the lens barrel, and to set the light vacated by the retracting. It is a function to move another lens to the space on the axis. In Japanese Patent Application Laid-Open No. H11-163, the anti-vibration lens is retracted from a position on the optical axis, and another lens arranged on the image surface side of the anti-vibration lens enters the space on the optical axis that has been vacated by the retreat. The disclosed lens barrel is disclosed.

JP-A-2005-045816

  However, in the lens barrel disclosed in Patent Literature 1, the image stabilizing lens is retracted to a retracted position beyond the original shift range for image stabilization. For this reason, it is necessary to provide a retraction mechanism for moving the anti-vibration lens to the retracted position in the shift drive unit that shifts the anti-vibration lens within the shift range, and the configuration of the shift drive unit including the retraction mechanism is complicated, and the shift The drive unit is easy to increase in size. This leads to an increase in the size of a lens barrel incorporating the shift drive unit and an imaging device in which the lens barrel is stored.

  The present invention provides a small retractable lens barrel having a lens retractable storage function and an imaging apparatus including the same.

  The lens barrel according to one aspect of the present invention performs a retracting operation into the main body of the imaging device from a state where the lens barrel protrudes from the main body. The lens barrel includes a first lens unit that can be shifted in a first direction and a second direction that are orthogonal to the optical axis and that are orthogonal to each other, and a first lens unit that includes a first lens unit and a second lens unit. A first shift actuator that shifts and drives the first lens unit in one of the directions, a second shift actuator that shifts and drives the first lens unit in the other of the first and second directions, and a first lens A second lens unit that is disposed closer to the image plane than the unit and retracts from the optical axis in the one direction during the storage operation. In the retracting operation, the first lens unit is shifted and driven by the first shift actuator to a side of the one direction opposite to the side on which the second lens unit is retracted, and is moved relative to the second lens unit. And moves to positions aligned in the first direction.

  An imaging apparatus as another aspect of the present invention includes a main body, and a lens barrel that performs an operation of storing the main body from a state protruding from the main body. The lens barrel is a lens unit having an anti-vibration function for reducing image shake due to shake of the imaging device, and is shiftable in a first direction and a second direction orthogonal to the optical axis and orthogonal to each other. A first lens unit, a first shift actuator for shifting and driving the first lens unit in one of the first and second directions, and a first and second direction for driving the first lens unit in the first and second directions. A second shift actuator that is driven to shift in the other direction, and a second lens unit that is disposed closer to the image plane than the first lens unit and retracts from the optical axis in the one direction during the storage operation. Having. The imaging device has control means for controlling the first and second shift actuators. In a state in which the lens barrel is stored in the main body, the first lens unit is arranged at a position aligned in the one direction with respect to the second lens unit retracted in the one direction. The control means controls the first shift actuator such that the first lens unit is shifted in the one direction in the retracting operation to the side opposite to the side on which the second lens unit is retracted. And

  A control program according to another aspect of the present invention is a computer program used for an imaging apparatus having a main body and a lens barrel that performs a storage operation in a state where the main body is protruded from the main body. The lens barrel is a lens unit having an anti-vibration function for reducing image shake due to shake of the imaging device, and is shiftable in a first direction and a second direction orthogonal to the optical axis and orthogonal to each other. A first lens unit, a first shift actuator for shifting and driving the first lens unit in one of the first and second directions, and a first and second direction for driving the first lens unit in the first and second directions. A second shift actuator that is driven to shift in the other direction, and a second lens unit that is disposed closer to the image plane than the first lens unit and retracts from the optical axis in the one direction during the storage operation. Having. In a state where the lens barrel is stored in the main body, the first lens unit is arranged at a position aligned with the second lens unit retracted in the one direction in the one direction. In the storage operation, the control program causes the computer of the imaging apparatus to perform the first shift so that the first lens unit is driven to shift to the side opposite to the side on which the second lens unit is retracted in the one direction. The actuator is controlled.

  Advantageous Effects of Invention According to the present invention, it is possible to realize a compact and low power consumption retractable lens barrel while having a lens retracting and storing function, and to reduce the size, thickness, and power consumption of an imaging apparatus equipped with the same. Can be contributed to.

FIG. 1 is a diagram illustrating a configuration of an imaging apparatus including a lens barrel that is Embodiment 1 of the present invention. FIG. 2 is a block diagram illustrating a configuration of a shift lens drive control unit in FIG. 1. FIG. 3 is a diagram illustrating the positions of respective lens units in the extended state and the retracted state of the lens barrel in the first embodiment. FIG. 2 is a diagram illustrating a focus lens unit and a shift lens unit in a state where a lens barrel is extended and retracted according to the first embodiment. 5 is a flowchart illustrating the operation of the camera according to the first embodiment. FIG. 4 is a diagram illustrating a control gain for a shift lens unit according to the first embodiment. FIG. 3 is a diagram illustrating a position of a shift lens unit according to the first embodiment. 9 is a flowchart illustrating an operation of the camera according to the second embodiment of the present invention. FIG. 10 is a diagram illustrating an example of a shift driving force applied to a shift lens unit in the second embodiment. FIG. 13 is a diagram illustrating another example of the shift driving force applied to the shift lens unit in the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 illustrates a configuration of a camera (imaging device) including a retractable lens barrel according to a first embodiment of the present invention.

  A zoom lens unit 101 including a zoom lens and a holding frame for holding the zoom lens performs zoom (magnification) by moving in a direction in which the optical axis of the lens barrel extends (hereinafter, referred to as an optical axis direction). The zoom drive control unit 102 includes a zoom actuator (not shown) such as a motor, and controls driving of the zoom lens unit 101 (zoom driving).

  An anti-vibration shift lens unit (first lens unit) 103 including a shift lens and a holding frame for holding the shift lens has a first direction and a second direction orthogonal to the optical axis and orthogonal to each other. An image stabilizing operation for moving (shifting) and reducing image shake due to camera shake is performed. Camera shake is camera shake caused by hand shake or the like. The shift lens drive control unit 104 includes two shift actuators (not shown) that shift the shift lens unit 103 in the first direction and the second direction, respectively (described with reference to FIG. 2). The shift driving of 103 is controlled. In the power saving mode, the zoom drive control unit 102 and the shift lens drive control unit 104 stop supplying power to the zoom actuator and the shift actuator, respectively.

  The aperture / shutter unit 105 performs light amount adjustment and exposure control for an image sensor (image surface) described later. The aperture / shutter drive control unit 106 controls driving of the aperture / shutter unit 105.

  A focus lens unit (second lens unit) 107 including a focus lens and a holding frame for holding the focus lens is disposed closer to the imaging surface (image surface) than the shift lens unit 103, and moves in the optical axis direction to focus. Make adjustments. The focus drive control unit 108 controls the driving of the focus lens unit 107 by performing an AF operation.

  The imaging element 109 is configured by a photoelectric conversion element such as a CCD sensor or a CMOS sensor. The imaging element 109 photoelectrically converts a subject image formed by an imaging optical system including the zoom lens unit 101, the shift lens unit 103, the aperture / shutter unit 105, and the focus lens unit 107 to generate an imaging signal.

  The imaging signal processing unit 110 generates a video signal from the imaging signal output from the imaging device 109. The video signal processing unit 111 performs processing on the video signal according to its use, and generates image data.

  The display unit 112 displays the image data output from the video signal processing unit 111. The posture information control unit 114 performs settings for the video signal processing unit 111 and the display unit 112 according to the posture of the camera. The operations of the imaging element 109 and the display unit 112 are controlled by the display control unit 113.

  The power supply unit 115 supplies power to the entire camera. The external input / output terminal unit 116 is a terminal for inputting / outputting a communication signal and a video signal with the outside. The operation unit 117 includes operation members such as buttons, dials, and touch panels that can be operated by the user. For example, it includes a power button for switching power on / off, a mode selection button for selecting a still image capturing mode and a moving image capturing mode, and a zoom button for instructing start of zoom and a zoom direction (wide-angle direction or telephoto direction). Further, the operation unit 117 causes the shift lens unit 103 and the imaging button capable of performing two-stage operations (half-press operation and full-press operation) for starting the imaging preparation operation and the imaging operation to perform an image stabilization operation (image stabilization). ON) or an anti-shake selection button for selecting whether or not (anti-shake OFF).

  The storage unit 118 stores various data such as image data obtained by imaging. The main control unit 119 controls the zoom drive control unit 102, the shift lens drive control unit 104, the aperture / shutter drive control unit 106, and the focus drive control unit 108 to enable the image pickup device 109 to capture a good subject image. I do. In addition, the main control unit 119 controls the imaging signal processing unit 110, the video signal processing unit 111, the display control unit 113, and the attitude information control unit 114 to enable good generation and display of a video signal. In the present embodiment, a control unit is configured by the main control unit 119 and the shift lens drive control unit 104.

  In the camera configured as described above, when the power button provided on the operation unit 117 is turned on, the lens barrel, which has been in the retracted state, is extended (projects) from the camera body, and the camera is ready to take an image. It becomes. The extension operation of the lens barrel and the storage operation described later are performed by driving a zoom actuator that drives the zoom lens unit 101 for zooming.

  When a zoom button provided on the operation unit 117 is operated, the main control unit 119 causes the zoom drive control unit 102 to drive the zoom lens unit 101 according to the operation direction (wide-angle direction or telephoto direction) of the zoom button. .

  Then, when the imaging button provided on the operation unit 117 is half-pressed, the main control unit 119 causes the focus drive control unit 108 to perform the AF operation, and drives the focus lens unit 107 to perform focus adjustment. . Further, the main control unit 119 causes the aperture / shutter drive control unit 106 to perform a setting operation so that the aperture / shutter unit 105 can obtain an appropriate exposure.

  When the imaging button is fully pressed, the main control unit 119 causes the imaging element 109 to perform photoelectric conversion of a subject image, and causes the imaging signal processing unit 110 to generate image data. Then, the generated image data is stored in the storage unit 118 or displayed on the display unit 112.

  After the image capturing is enabled, if the image stabilization ON is selected with the image stabilization selection button provided on the operation unit 117, the main control unit 119 instructs the shift lens drive control unit 104 to perform an image stabilization operation. . The shift lens drive control unit 104 that has received the instruction of the image stabilization operation performs the image stabilization operation until the instruction of the image stabilization OFF is given.

  When the power button is turned off, the lens barrel that has been in the extended state (projected state) performs a storing operation and is stored in the camera body. The movement of each lens unit in the lens barrel during the storage operation at this time will be described later.

  FIG. 2 shows the configuration of the shift lens drive control unit 104. The shift lens drive control unit 104 has a pitch shake sensor 201 that detects camera shake in the pitch direction as a vertical direction, and a yaw shake sensor 202 that detects camera shake in the yaw direction as a horizontal direction. Each shake sensor is constituted by a gyro sensor (angular velocity sensor), and outputs a shake signal indicating an angular velocity.

  Further, the shift lens drive control unit 104 includes a first shift actuator 207 that drives the shift lens unit 103 in a first direction (one direction) forming 45 degrees with respect to the pitch direction and the yaw direction. Further, a second shift actuator 208 that drives the shift lens unit 103 in a second direction (the other direction) orthogonal to the first direction is provided. Each shift actuator includes a shift lens unit 103 and a coil and a magnet provided on one and the other of a shift base member (not shown) that holds the shift lens unit 103 in a shiftable manner. The shift lens unit 103 is driven by an electromagnetic force (Lorentz force) generated by energizing the coil.

  In FIG. 2, the first and second shift actuators 207 and 208 are arranged in the pitch direction and the yaw direction with respect to the shift lens unit 103, but are actually rotated by 45 degrees with respect to the shift lens unit 103. It is arranged in each position.

  Further, the shift lens drive control unit 104 has a first shift position sensor 209 and a second shift position sensor 210 for detecting shift positions of the shift lens 103 in the first and second directions. Each shift position sensor is constituted by, for example, a Hall element. Further, the shift lens drive control unit 104 includes a posture detection unit 211 and an image stabilization control unit 203. The posture detection unit 211 detects the posture of the camera and outputs a posture detection signal.

  The image stabilization control unit 203 calculates shake amounts (angles) in the first and second directions by using shake signals from the pitch and yaw shake sensors 201 and 202. Then, based on the shake amount and the current actual shift position obtained from the first and second shift position sensors 209 and 210, first and second directions of the shift lens unit 103 for reducing image shake. The target shift position at is calculated. The image stabilization control unit 203 starts control of driving (energizing the coil) of the first and second shift actuators 207 and 208 so as to shift the shift lens unit 103 toward the calculated target shift position. As a result, the shift lens unit 103 starts shifting toward the target shift position in the first and second directions.

  Further, the image stabilization control unit 203 performs the first and second shifts such that the actual shift positions obtained by the first and second shift position sensors 209 and 210 approach the target shift positions in the first and second directions, respectively. The feedback control of the actuators 207 and 208 is performed. At this time, the anti-vibration control unit 203 controls the first and second shift actuators 207 and 208 by PID (Proportional-Integral-Derivative) control. That is, the control is performed by using three elements: the deviation between the actual shift position and the target shift position, its integral value, and its differential value. As the shift lens unit 103 reaches the target shift position in the first and second directions in this manner, image blur is suppressed.

  FIGS. 3A and 3B show the positions of the lens units in the lens barrel 301 in the extended state and the retracted state, respectively, as viewed from a direction orthogonal to the optical axis direction. FIGS. 4A and 4B show the focus lens unit 107 and the shift lens unit 103 in the lens barrel 301 in the extended state and the retracted state, respectively, as viewed from the image plane side in the optical axis direction. ing. In these figures, AXL indicates the optical axis. FIGS. 3A and 4A show a neutral state in which the shift lens unit 103 is not shifted with respect to the optical axis AXL due to a vibration reduction operation.

  The lens barrel 301 has a telescopic structure in which the lens barrel 301 extends long in the extended state extended from the camera main body 305 and contracts short in the retracted state stored in the camera main body 305. In the lens barrel 301 in the extended state, the fixed first lens unit 302, the zoom lens unit 101, the aperture / shutter unit 105, the shift lens unit 103, and the focus lens unit 107 are arranged in this order from the object side. Is arranged. Although the arrangement order of the aperture / shutter unit 105 and the shift lens unit 103 in FIG. 3A is different from the arrangement order shown in FIG. 1, the actual arrangement order may be any. Further, the aperture / shutter unit 105 and the shift lens unit 103 may be integrated.

  An image sensor 109 is arranged on the image plane side of the focus lens 107 in the camera body 305.

  As shown in FIG. 3B, when the lens barrel 301 is in the retracted state, the first lens unit 302, the zoom lens unit 101, the aperture / shutter unit 105, and the shift lens unit 103 are moved closer to the image sensor 109. Move to image side. Accordingly, the distance between the first lens unit 302, the zoom lens unit 101, the aperture / shutter unit 105, the shift lens unit 103, and the image sensor 109 becomes narrower than in the extended state. Further, the focus lens unit 107 is retracted in a first direction from a position on the optical axis AXL. More specifically, the focus lens unit 107 moves from the position on the optical axis AXL in the extended state shown in FIG. 4A to the optical axis AXL as shown by a black arrow in FIG. It rotates to the evacuation position, which is a position deviated in the direction 1, and retreats.

  Then, the shift lens unit 103 moves (enters) into the space vacated by the retreat of the focus lens unit 107. As a result, the shift lens unit 103 is located at a position aligned with the focus lens unit 107 in the first direction. By having such a lens retracting storage function, the total length of the lens barrel 301 in the retracted state can be further reduced as compared with a case without the lens retracting storage function.

  However, if the shift lens unit 103 is simply inserted into the empty space where the focus lens unit 107 is retracted, it is necessary to increase the retreat amount of the focus lens unit 107 in order to avoid interference with the shift lens unit 103. . As a result, the diameter of the lens barrel 301 must be increased. Therefore, in the present embodiment, the fact that the shift lens unit 103 can be shifted is used, and the focus lens unit 107 in the first direction is retracted as shown by a white arrow in FIG. Is shifted by a predetermined shift amount to the opposite side to the shifted side. Thus, the shift lens unit 103 can be inserted into the empty space where the focus lens unit 107 is retracted without increasing the diameter of the lens barrel 301.

  The predetermined shift amount is a range of a shiftable amount for the vibration reduction operation of the shift lens unit 103, and may be any shift amount that can avoid interference between the shift lens unit 103 and the focus lens unit 107.

  In the present embodiment, the direction in which the focus lens unit 107 is retracted and the first direction in which the first shift actuator 207 can shift the shift lens unit 103 alone are matched. Therefore, it is not necessary to drive the second shift actuator 208 in order to shift the shift lens unit 103 in the retracting operation of the lens barrel 301. Therefore, power consumption can be reduced as compared with the case where both the first and second shift actuators 207 and 208 are driven.

  Next, the storing operation of the lens barrel from the extended state to the retracted state and its control will be described. During a period from the extended state of the lens barrel to the retracted state, the focus lens unit 107 is gradually retracted (rotated) from the optical axis to the retracted position while moving on the optical axis toward the image sensor. . The retracting operation of the focus lens unit 107 is performed, for example, by a cam formed on a cam ring (not shown) provided in the lens barrel and rotated around the optical axis in accordance with the retracting operation of the lens barrel. Just fine.

  During this time, the shift lens unit 103 also moves on the optical axis to the image sensor side, and shifts by a predetermined shift amount to the opposite side to the retracted side at least before the storage operation is completed. . Thereby, when the storing operation is completed, the focus lens unit 107 is at the retracted position, the shift lens unit 103 is at the position shifted by a predetermined shift amount, and the focus lens unit 107 and the shift lens unit 103 are arranged in the first direction. .

  The flowchart of FIG. 5 shows the operation of the camera including the operation of storing the lens barrel. The main control unit 119 as a computer controls the operation according to a camera control program which is a computer program. First, when the power button of the camera is turned on in step S101, the main control unit 119 drives the zoom actuator to extend the lens barrel from the retracted state. Thereafter, the main control unit 119 stops the extension of the lens barrel when the lens barrel has reached the wide-angle end (Wide position) in step S102 and is ready for imaging, and in step S103, the main unit in the camera shown in FIG. Start each part.

  Next, in step S104, the main control unit 119 determines whether or not the power button has been turned off. If the power button has not been turned off, the process returns to step S103 to maintain the activated state of the camera. On the other hand, if the power button has been turned off, the main control unit 119 proceeds to step S105 to start driving the zoom actuator to retract the lens barrel. If the shift of the shift lens unit 103 for avoiding interference (hereinafter, also referred to as a storage shift) is permitted in step S106, the process proceeds to step S107.

  Note that the storage shift of the shift lens unit 103 is permitted when a predetermined time has elapsed after the start of the storage operation or when the storage operation has advanced by a predetermined amount. This is for the following reason. For a while after the start of the storing operation, there is a case where the imaging by the imaging element 109 and the display of the image on the display unit 112 are still performed. If the storage shift of the shift lens unit 103 is performed during this time, the image displayed on the display unit 112 may be distorted or the like, giving the user a sense of discomfort. Also, it is desirable that the image stabilization operation by the shift lens unit 103 be enabled while the image is displayed on the display unit 112.

  In step S107, the main control unit 119 reduces the control gain in the shift lens drive control unit 104 (the image stabilization control unit 203) in the second direction in which the interference between the shift lens unit 103 and the focus lens unit 107 does not occur. Change to That is, the control gain for the second shift actuator 207 is reduced. Thus, power consumption of the second shift actuator 207 can be reduced.

  FIG. 6 shows an example of changing the control gain in the second direction. The control gain in the second direction is kept normal until the storage operation is performed from the Wide position to the storage position. The normal control gain is a control gain (first control gain) set for the first and second shift actuators 207 and 208 when performing shift driving of the shift lens unit 103 in the image stabilizing operation. Thereafter, when the storage shift is permitted, the control gain in the second direction is gradually reduced from the normal control gain to 0 (second control gain). Thus, the retracting operation of the lens barrel is continued with the control gain in the second direction being zero.

  As a method of changing the control gain in the second direction, the feedback gain of the image stabilization control unit 203 with respect to the second shift actuator 208 may be reduced, or the amount of current applied to the coil of the second shift actuator 208 may be reduced. May be instructed directly and lowered.

  Next, in step S108, the main control unit 119 performs a storage shift of the shift lens unit 103 in the first direction. FIG. 7 shows a change in the position of the shift lens unit 103 in the first direction. The shift lens unit 103 in the neutral state is located on the optical axis between the Wide position and the Tele position (telephoto end). When the storage shift is permitted during the storage operation from the Wide position to the storage position, the storage shift of the shift lens unit 103 is started, and the storage shift of the shift lens unit 103 is completed before the storage operation is completed. . Thereafter, the shift lens unit 103 can enter a position aligned with the focus lens unit 107 in the first direction without interfering with the focus lens unit 107 at the retracted position.

  When the storing operation of the lens barrel is completed in step S109, the main control unit 119 shuts off the power supply to each unit of the camera.

  In the present embodiment, the retracting amount of the focus lens unit 107 can be reduced by performing the storing shift of the shift lens unit 103 in the storing operation of the lens barrel having the lens retracting storage function. In addition, the storage shift of the shift lens unit 103 is performed by driving only the first shift actuator 207. Therefore, according to the present embodiment, it is possible to realize a retractable lens barrel having a small (small diameter) and low power consumption while having a lens retracting and storing function. Therefore, it is possible to contribute to miniaturization and thinning of the camera including the lens barrel.

  Next, a second embodiment of the present invention will be described. The basic configuration of the camera according to the second embodiment is the same as that of the camera according to the first embodiment, and the same reference numerals as in the first embodiment denote constituent elements common to the first embodiment. The following mainly describes differences from the first embodiment.

  The interference prevention control unit 120 shown in parentheses in FIG. 1 shifts and drives the shift lens unit 103 so that the shift lens unit 103 does not interfere with other members in the lens barrel during the storage operation of the lens barrel. And controls the zoom drive control unit 102. The “other members” here include the focus lens unit 107 and other members. In the present embodiment, a control unit is configured by the main control unit 119, the shift lens drive control unit 104, and the interference prevention control unit 120.

  The flowchart of FIG. 8 shows the operation of the camera including the operation of storing the lens barrel. The main control unit 119 as a computer controls the operation according to a camera control program which is a computer program.

  Steps S201 to S206 are the same as steps S101 to S106 of the first embodiment (FIG. 5). When the storage shift of the shift lens unit 103 is permitted in step S206, the main control unit 119 proceeds to step S207. In step S207, the main control unit 119 determines whether or not another member in the lens barrel including the shift lens unit 103 and the focus lens unit 107 is interfering. The presence / absence of the interference is determined based on the integrated value of the deviation between the actual shift position and the target shift position calculated by the PID control at the Wide position where the interference does not occur, and storing the reference value and the reference value. The comparison is made with the current integrated value. If the current integrated value is larger than the reference value, it is determined that there is interference.

  The main control unit 119, which has determined that there is interference in step S207, proceeds to step S210, and shift-drives the shift lens unit 103 to the side where interference in the first direction and the second direction can be avoided through the interference prevention control unit 120. Performs two-axis control. At this time, in the first direction, there is a high possibility that interference between the shift lens unit 103 and the focus lens unit 107 during the retreat operation has occurred. Therefore, as shown in the upper part of FIG. 9, the interference prevention control unit 120 controls the first shift actuator 207 to avoid the interference, that is, to the side opposite to the retreat side of the focus lens unit 107 (the lower part in the figure). Side) to generate an oscillating shift driving force (torque). This eliminates interference between the shift lens unit 103 and the focus lens unit 107.

  On the other hand, in the second direction, the second shift actuator 208 sequentially generates vibratory shift driving forces in the positive and negative directions as shown in the lower part of FIG. This eliminates interference between the shift lens unit 103 and members other than the focus lens unit 107.

  Note that FIG. 9 illustrates a case in which each shift actuator periodically generates a short-time shift driving force a plurality of times to generate an oscillating shift driving force. However, as illustrated in FIG. During this period, the shift driving force may be continuously generated.

  Thereafter, in step S211, the main control unit 119 determines that the zoom lens unit 101 is in the vicinity of the zoom storage position, which is the position when the storage operation of the lens barrel is completed (within a predetermined movement amount up to the zoom storage position). Is determined. If the zoom lens unit 101 has not yet reached the vicinity of the zoom storage position, the main control unit 119 returns to step S207, and determines again whether there is interference. On the other hand, if the zoom lens unit 101 has reached the vicinity of the zoom storage position, the main control unit 119 proceeds to step S212 assuming that interference has continued, and rotates the zoom actuator in the reverse direction. Extend the lens barrel. After performing the zoom drive to the Wide position at which the interference is eliminated, the main control unit 119 returns to step S207.

  If it is determined in step S207 that there is no interference, the main control unit 119 proceeds to step S208. In step S208, the main control unit 119 stops driving the second shift actuator 208 and drives the first shift actuator 207 (that is, performs one-axis control) to perform the storage shift of the shift lens unit 103. Thereafter, in step S209, the main control unit 119 determines whether or not the storing operation of the lens barrel has been completed. If not completed, the process returns to step S207. If completed, the power supply to each unit of the camera is performed. Shut off supply.

  Also in the present embodiment, as in the first embodiment, the retracting amount of the focus lens unit 107 can be reduced by performing the storage shift of the shift lens unit 103 in the storing operation of the lens barrel having the lens retracting storage function. it can. In addition, the storage shift of the shift lens unit 103 is performed by driving only the first shift actuator 207. Therefore, also in the present embodiment, it is possible to realize a retractable lens barrel having a small (small diameter) and low power consumption while having a lens retracting and storing function. Therefore, it is possible to contribute to miniaturization and thinning of the camera including the lens barrel.

  In this embodiment, when interference between the shift lens unit 103 and other members occurs in the retracting operation of the lens barrel, a shift driving force is applied to the shift lens unit 103 or the lens is moved in order to eliminate the interference. The retracting operation is performed again by extending the lens barrel. For this reason, even if the interference once occurs, the storing operation of the lens barrel can be completed.

  In each embodiment, the retracting operation of the focus lens unit 107 from the optical axis and the storage shift of the shift lens unit 103 are performed on opposite sides in the first direction (one direction), and the storage shift is performed in the first direction. Has been described. However, the retreat operation and the storage shift may be performed on opposite sides in the second direction (one direction), and the storage shift may be performed by the second shift actuator 208. In this case, the second shift actuator 208 corresponds to a “first shift actuator”. As described above, the retracting operation and the storage shift may be performed in one of the first and second directions, and the storage shift is performed in the one of the first and second shift actuators in the shift lens unit 103. May be performed by a shift actuator that shift-drives the image.

  Further, in each embodiment, the case has been described where the first and second directions are at 45 degrees with respect to the pitch direction and the yaw direction. However, the first and second directions are referred to as the pitch direction and the yaw direction. One or the other of the directions may be used.

  Each of the embodiments described above is merely a representative example, and various modifications and changes can be made to each embodiment in practicing the present invention.

103 shift lens unit
107 Focus lens unit 119 Main control unit

Claims (8)

A lens barrel that performs a storing operation from the state protruding with respect to the main body of the imaging apparatus from the state protruding from the main body,
A first lens unit orthogonal to the optical axis and capable of shifting in a first direction and a second direction orthogonal to each other;
A first shift actuator that shift-drives the first lens unit in one of the first and second directions;
A second shift actuator that shifts the first lens unit in the other of the first and second directions;
A second lens unit that is disposed closer to the image plane than the first lens unit and retracts in the one direction from above the optical axis in the storing operation;
The first lens unit is shifted by the first shift actuator to a side of the one direction opposite to a side on which the second lens unit is retracted in the retracting operation, and the second lens unit is driven by the second lens unit. A lens barrel that moves to a position aligned with the unit in the first direction. An imaging apparatus having a main body and a lens barrel that performs an operation of storing the main body into the main body from a state protruding from the main body,
The lens barrel is
What is claimed is: 1. A lens unit having an anti-vibration function for reducing image shake due to shake of an image pickup apparatus, comprising: a first lens which is orthogonal to an optical axis and is shiftable in first and second directions orthogonal to each other Unit and
A first shift actuator that shift-drives the first lens unit in one of the first and second directions;
A second shift actuator that shifts the first lens unit in the other of the first and second directions;
A second lens unit that is disposed closer to the image plane than the first lens unit and retracts in the one direction from above the optical axis in the storing operation;
The imaging apparatus has control means for controlling the first and second shift actuators,
In a state in which the lens barrel is stored in the main body, the first lens unit is disposed at a position aligned in the one direction with respect to the second lens unit retracted in the one direction,
The control means controls the first shift actuator so that in the storing operation, the first lens unit is driven to shift to a side of the one direction opposite to a side on which the second lens unit is retracted. An imaging device characterized by controlling. The control means includes:
When a control gain for the first and second shift actuators when the first lens unit is shift-driven for the image stabilizing operation is a first control gain,
The imaging apparatus according to claim 2, wherein a second control gain for the second shift actuator in the storing operation is lower than the first control gain.   The control gain is characterized in that, in the storing operation, after the control gain for the second shift actuator is maintained at the first control gain, the control gain is lower than the first control gain during the storing operation. The imaging device according to claim 3. The control means includes:
Detecting the presence or absence of interference between the first lens unit and other members in the lens barrel in the storing operation;
The imaging apparatus according to any one of claims 2 to 4, wherein when the interference is detected, a shift driving force is generated in the first and second shift actuators. The control means includes:
In the image stabilizing operation, control of the first and second shift actuators is performed using a deviation between a target shift position and an actual shift position of the first lens unit, an integral value of the deviation, and a differential value of the deviation. Do
The imaging apparatus according to claim 5, wherein, in the storing operation, the interference is detected using the integrated value.   The control means drives the lens barrel in a direction protruding from the main body when the interference is not resolved even when the shift driving force is generated in the first and second shift actuators. The imaging device according to claim 5, wherein An imaging apparatus having a main body, and a lens barrel that performs a storage operation in the main body from a state protruding from the main body,
The lens barrel is
What is claimed is: 1. A lens unit having an anti-vibration function for reducing image shake due to shake of an image pickup apparatus, comprising: a first lens which is orthogonal to an optical axis and is shiftable in first and second directions orthogonal to each other Unit and
A first shift actuator that shift-drives the first lens unit in one of the first and second directions;
A second shift actuator that shifts the first lens unit in the other of the first and second directions;
A second lens unit that is disposed closer to the image plane than the first lens unit and retracts in the one direction from above the optical axis in the storing operation;
In a state where the lens barrel is stored in the main body, the first lens unit is arranged at a position aligned in the one direction with respect to the second lens unit retracted in the one direction. A computer program for causing a computer of the imaging apparatus configured to perform the operation of controlling the first and second shift actuators,
In the storing operation, the computer controls the first shift actuator so that the first lens unit is shifted and driven in the one direction in a direction opposite to a side on which the second lens unit is retracted. A control program for an image pickup apparatus, wherein