JP2014092650A - Imaging unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging unit that is loaded with a camera shake correction mechanism suppressing generation of a collision sound or impact accompanied by an unexpected movement of a movable member, and capable of preventing generation of a pressing force toward an imaging optical system or an image pickup element.SOLUTION: An imaging unit 13 including an imaging optical system 12 and an image pickup element 22, and moving in a state with a retracting barrel housed and in a state with photographing paused comprises; a stationary member (33); and a movable member(41) that is movable to the stationary member having the image pickup element provided. In the movable member, there are provided that a first stopper part (41a) facing the stationary member at first intervals (La1 and La2) in a direction orthogonal to an optical axis when one (32a) of movable optical member housing members to be moved in a photographing optical axis OA direction accompanied by transition to the state with the retracting barrel housed and the state with the photographing paused is put into an extension position, and a second stopper part (41b) facing the movable optical member housing member at second intervals (Lb1 and Lb2) smaller than at the first intervals in the direction orthogonal to the optical axis when a movable optical member housing member is put into a retracting barrel position.

Description

  The present invention relates to an imaging unit having a camera shake correction function for correcting camera shake at the time of shooting, and an electronic device equipped with the imaging unit.

  In an imaging device, a digital camera (a digital still camera or a digital video camera) is used as an electronic device that causes a subject image to be received by an imaging device through a photographing optical system and generates a digital image corresponding to the subject image based on an image signal from the imaging device. )It has been known. As such a digital camera, a digital camera with a so-called camera shake correction function in which an image pickup unit having a camera shake correction mechanism for correcting camera shake at the time of shooting has been put into practical use in recent years.

  In the camera shake correction mechanism, for example, the imaging optical axis direction of the imaging optical system is set as the Z-axis direction, and the imaging element is moved along the XY plane orthogonal to the imaging optical axis according to the amount of blur of the subject image caused by camera shake. Some have adopted a moving structure. In this camera shake correction mechanism, a movable member provided with an image pickup element is held in a fixed range parallel to the XY plane so that it can move within a predetermined range on a fixed member provided in a housing with a fixed position relative to the photographing optical system. Has been. The movable member is moved in parallel with the XY plane orthogonal to the photographing optical axis by a voice coil motor that generates a driving force by appropriately energizing a coil disposed in a magnetic field formed by a permanent magnet, for example. . In the conventional imaging unit using this camera shake correction mechanism, for example, by detecting the tilt in the X-axis direction and the Y-axis direction using a camera shake detection sensor, and by changing the energization current to the coil based on this detection output, The camera shake is corrected by controlling the image sensor to move following the movement of the subject image due to camera shake.

  In this conventional imaging unit, it is desirable to stop energization of the coil from the viewpoint of reducing power consumption when camera shake correction is not performed. However, since the movable member is provided so as to be movable within a predetermined range, when the energization to the coil is stopped and the position control of the movable member is stopped, the movable member freely moves within the predetermined range. Therefore, there is a risk that a collision sound or an impact may be generated by contact with the end of the movable range.

  Thus, there is an imaging unit (camera with a camera shake correction function) provided with a lock mechanism that mechanically fixes and holds a movable member (imaging device) (for example, see Patent Document 1). In this structure, a locking member that is movable in the Z-axis direction by an internal thread member that is moved in the Z-axis direction to displace the fifth lens group in the photographing optical axis direction is provided, and a needle-like portion provided on the locking member Is inserted through a through hole provided in the movable member, so that the unintended movement of the movable member can be prevented even when the coil is not energized. For this reason, power consumption can be suppressed and generation | occurrence | production of the collision sound and impact accompanying unexpected movement of a movable member can be prevented.

  However, in the above-described conventional imaging unit (camera with camera shake correction function), the movable member moves in the direction parallel to the XY plane by fitting the needle-like portion of the locking member and the through hole of the movable member. Therefore, it is necessary to make the gap between the needle-like portion and the through hole viewed in a direction parallel to the XY plane as small as possible. For this reason, unless the mutual center positions of the needle-like part and the through hole viewed in the direction parallel to the XY plane are made to coincide with each other with extremely high accuracy, the needle-like part is moved when the movable member moves to the movement restricted state. And the inner peripheral wall surface of the through hole interfere with each other, and the XY plane is attached to the fifth lens group holding frame supported together with the locking member via the locking member provided with the needle-like portion. There is a possibility that a pressing force is applied in a parallel direction, or a pressing force in the Z-axis direction is applied to the movable member. The pressing force to the fifth lens group holding frame in the direction parallel to the XY plane acts to shift the position of the fifth lens group held there in the direction perpendicular to the photographing optical axis. The pressing force in the Z-axis direction to the movable member acts to shift the position of the image sensor held there in the imaging optical axis direction, so that the optical positional relationship between the imaging optical system and the image sensor Therefore, it is desirable to eliminate the possibility of such a pressing force being generated.

  The present invention has been made in view of the above circumstances, and prevents the generation of a pressing force on the imaging optical system and the imaging element while suppressing the occurrence of a collision sound and an impact caused by an unexpected movement of the movable member. An object of the present invention is to provide an imaging unit equipped with a camera shake correction mechanism that can perform the above-described operation.

  The image pickup unit according to claim 1 is an image pickup unit that obtains a subject image formed by a shooting optical system with an image pickup element, and retracts at least a part of a plurality of optical members of the shooting optical system to By moving at least a part of each of the optical members from the retracted storage state for storing the optical members to the subject side, the imaging standby state is established, and a plurality of optical member storage members that respectively hold the optical members, and a photographic optical axis. A position of the optical axis orthogonal to the orthogonal direction is fixed to the imaging optical axis and the fixing member is provided on the casing, and the imaging element is provided, and is parallel to a plane orthogonal to the imaging optical axis with respect to the fixing member. A movable member that is movably supported by the fixed member, and the movable member is arranged in the direction of the photographing optical axis in accordance with the transition between the retracted storage state and the photographing standby state among the optical member housing members. When one of the movable optical member housing members to be moved is set to the extension position on the subject side, the first stopper portion facing the fixed member at a first interval in the direction orthogonal to the optical axis, and the movable optical member housing When the member is in the retracted position on the image plane side, a second stopper portion is provided that faces the movable optical member housing member at a second interval smaller than the first interval in the direction orthogonal to the optical axis. It is characterized by.

  In the imaging unit according to the present invention, it is possible to prevent the generation of a pressing force on the imaging optical system and the imaging element while suppressing the occurrence of a collision sound and an impact caused by the unexpected movement of the movable member.

It is explanatory drawing which shows a mode that the state of the imaging unit 13 in the digital camera 10 as an example of the electronic device which concerns on this invention changed, (a) shows a retracted position, (b) shows an extended position. 2 is an explanatory diagram showing a control block in the digital camera 10. FIG. 3 is a schematic perspective view showing a configuration of an imaging unit 13. FIG. 3 is a front view showing the configuration of the imaging unit 13 as viewed from the negative side in the Z-axis direction. FIG. FIG. 5 is a front view similar to FIG. 4 showing the configuration of the imaging unit 13, but omitting the operation stage 41, the vertical side yoke 56, and the horizontal side yoke 57. 3 is a schematic perspective view showing a configuration of an operation stage 41. FIG. FIG. 4 is a front view showing the configuration of an operation stage 41 as viewed from the Z-axis direction negative side. It is sectional drawing obtained along the II line | wire shown in FIG. It is explanatory drawing which shows typically the action | operation stage 41 (the movable frame part 42 and the rotation control part 43) simplified, (a) shows a mode that it saw from the Z-axis direction positive side (object side), ( b) shows a state seen from the negative side in the Z-axis direction, and (c) shows a state seen from the negative side in the Y-axis direction. It is explanatory drawing which shows typically a mode that the lens barrel base 33 mentioned above was seen from the Z-axis direction negative side similarly to FIG. It is explanatory drawing which shows typically a mode that the imaging unit 13 mentioned above was seen from the Z-axis direction negative side similarly to FIG. 4A and 4B are schematic explanatory views showing the image pickup unit 13 in a cross section passing through two movable support balls 62 and a photographing optical axis OA, where FIG. It is explanatory drawing explaining a mode that the movement to the direction parallel to XY plane of the action | operation stage 41 with respect to the lens barrel base 33 is restrict | limited by the 1st stopper 64, (a) is an edge part of the X-axis direction positive | plus side And (b) shows a state existing at the end on the positive side in the Y-axis direction, and a state existing at the end on the negative side in the Y-axis direction, and (c) ) Shows the end on the negative side in the X-axis direction and the end on the negative side in the Y-axis direction, and (d) shows the end on the negative side in the X-axis direction and the end on the positive side in the Y-axis direction. It shows how it exists in the part. It is explanatory drawing explaining a mode that the movement to the direction parallel to XY plane of the action | operation stage 41 with respect to the lens barrel base 33 is restrict | limited by the 2nd stopper 65, (a) is an edge part of the Y-axis direction positive side (B) shows the state existing at the end on the positive side in the X-axis direction, (c) shows the state existing at the end on the negative side in the Y-axis direction, and (d) A state of being present at the end portion on the negative side in the axial direction is shown. FIG. 11 is an explanatory diagram showing a correction moving area CA defined by a first stopper 64 and a limited moving area RA defined by a second stopper 65 superimposed on a lens barrel base 33 similar to FIG. 10. It is a flowchart which shows an example of the content of the control processing of the transfer operation | movement from the imaging | photography standby state to a retracted storage state in the control part 21 (refer FIG. 2) which controls operation | movement of the digital camera 10 (imaging unit 13) comprehensively. It is a flowchart which shows an example of the content of the control processing of the transfer operation | movement from the imaging | photography standby state to a retracted storage state in the control part 21 which controls operation | movement of the digital camera 10 (imaging unit 13) comprehensively. It is explanatory drawing similar to FIG. 12 which shows imaging unit 13 'as another example, (a) shows a retracted position, (b) shows an extended position.

  Hereinafter, embodiments of an imaging unit according to the present invention and an electronic apparatus in which the imaging unit is mounted will be described with reference to the drawings.

  A schematic configuration of an imaging unit 13 as an example of an imaging unit according to the present invention and a digital camera 10 as an example of an electronic apparatus (imaging device) using the imaging unit 13 will be described with reference to FIGS. 1 to 8. To do. In the following description, the direction of the optical axis (see arrow OA (photographing optical axis OA) in FIG. 1B) of the imaging optical system 12 of the imaging unit 13 provided in the casing 11 described later with the digital camera 10 as a reference. Is the Z-axis direction (the subject side is the positive side (front side)). In addition, a direction orthogonal to the optical axis of the photographing optical system 12 (shooting optical axis OA (Z-axis direction)) is defined as an X-axis direction (the right side is a positive side when viewed from the front in FIG. 1). Further, a direction orthogonal to the X-axis direction and the Z-axis direction is taken as a Y-axis direction (the upper side is the positive side when FIG. 1 is viewed from the front). For this reason, a direction parallel to the XY plane is an optical axis orthogonal direction orthogonal to the optical axis of the imaging optical system 12 (imaging optical axis OA (Z-axis direction)).

  First, a digital camera 10 as an example of an electronic apparatus (imaging device) according to the present invention will be described with reference to FIGS. The digital camera 10 according to the present embodiment has a camera shake correction function (a camera shake correction mechanism 40 described later) that corrects camera shake by moving an image sensor 22 described later in a plane orthogonal to a shooting optical axis OA described later. . As shown in FIG. 1, the digital camera 10 has a casing 11 that has a rectangular parallelepiped shape as a whole, and a front surface of the casing 11 (a front side (Z-axis direction positive side) when FIG. 1 is viewed in front). ) Side is provided with an imaging unit 13 having a photographing optical system 12 (see FIG. 1B). The photographing optical system 12 includes an objective lens 12a (see FIG. 1B) disposed closest to the subject, a fixed lens (not shown), a focus lens 12b (see FIG. 5), a shutter unit, and an aperture unit ( A plurality of optical members (not shown). Each optical member as the photographing optical system 12 is held by the imaging unit 13 so as to be movable in the optical axis direction of the photographing optical system 12 (see arrow OA in FIG. 1B). In this specification, an optical axis line in the photographing optical system 12, that is, a rotationally symmetric axis serving as a central axis position of the optical element group in a photographing state is defined as a photographing optical axis OA (see FIG. 1B).

  The imaging unit 13 has a predetermined retracted position (collapsed storage state (see FIG. 1 (a))) and a predetermined extended position (imaging standby state (in the imaging standby state (the optical axis of the optical system 12)) along the imaging optical axis OA (Refer to FIG. 1 (b))). In the imaging unit 13, each optical of the imaging optical system 12 (see FIG. 1B) is shifted by moving between a retracted storage state (see FIG. 1A) and a shooting standby state (see FIG. 1B). A member (not shown) is moved as specified. In this embodiment, as described later, when the digital camera 10 is activated by the power button 14, the imaging unit 13 shifts to a shooting standby state (feeding position), and the digital camera 10 is deactivated by the power button 14. Then, the imaging unit 13 is set to shift to the retracted storage state (collapsed position).

  In the housing 11, a power button 14, a shutter button 15, and a mode switching dial 16 as operation units are provided on the upper surface (the upper surface when FIG. 1 is viewed from the front). The power button 14 is used to perform an operation (starting operation) for starting the digital camera 10 to be in an operating state and an operation (stopping operation) for stopping the digital camera 10 to be in a non-operating state. The operation of pushing down in the vertical direction is performed. The shutter button 15 is an operation to be pressed down in the vertical direction in order to execute the photographing operation of the subject. The mode switching dial 16 is an operation for rotating (rotating) around the rotation axis set inward in order to set various shooting modes (various still image modes, moving image modes, scene modes, etc.). It is something to do.

  Further, the casing 11 is provided with other operation switches 17 and a display unit 18 (see FIG. 2) on the rear surface (the surface on the back side (the negative side in the Z-axis direction when viewing FIG. 1 from the front)). The operation switch 17 is a direction instruction switch or various switches for setting each menu or the like. The display unit 18 includes a liquid crystal display or the like, and displays an image based on acquired (imaged) image data or image data recorded on a recording medium.

  As shown in FIG. 2, the digital camera 10 includes a control unit 21, an image sensor 22, a lens barrel drive unit 23, a position detection mechanism 24, a shake detection mechanism 25, and a camera shake correction mechanism 40. Have. The control unit 21 performs drive processing based on operations performed on the power button 14, the shutter button 15, the mode switching dial 16, and the operation switch 17 as operation units, image data generation processing based on signals from the image sensor 22, The control of the display unit 18, the lens barrel drive unit 23, and the camera shake correction mechanism 40, etc., is centralized by a program stored in the storage unit 21a. The control unit 21 acquires an image with the imaging element 22 via the photographing optical system 12 (see FIG. 1B), and appropriately displays the image on the display unit 18 provided on the back surface of the housing 11. Detection signals are input from the position detection mechanism 24 and the shake detection mechanism 25 to the control unit 21. The display unit 18, the image sensor 22, the lens barrel drive unit 23, and the camera shake correction mechanism 40 are supplied with electric power from a battery (not shown) via the control unit 21, and can execute each operation. .

  The imaging device 22 is configured by a solid-state imaging device such as a CCD (charge coupled device) image sensor or a CMOS image sensor. The imaging element 22 is provided in the imaging unit 13 on the imaging optical axis OA on the imaging plane side of the imaging optical system 12 via a camera shake correction mechanism 40 described later (see FIG. 12). The imaging element 22 converts the subject image formed on the light receiving surface 22a (see FIG. 6 and the like) through the photographing optical system 12 into an electrical signal (image data) and outputs the electrical signal (image data). The output electrical signal (image data) is transmitted to the control unit 21.

  The lens barrel drive unit 23 shifts the imaging unit 13 between a retracted retracted state (collapsed position (see FIG. 1A)) and an imaging standby state (feeding position (see FIG. 1B)). An optical member holding frame (not shown) that supports each optical member of the photographing optical system 12 is moved.

  The position detection mechanism 24 detects the position of an operation stage 41 (see FIG. 3 and the like) with respect to a lens barrel base 33, which will be described later. (See reference numerals 45 and 47 in FIG. 7 and the like).

  The shake detection mechanism 25 is a shake detection mechanism that detects a shake that occurs in the digital camera 10 itself (its housing 11), that is, a movement in space. In this embodiment, although not shown, the shake detection mechanism 25 includes a gyro sensor. The housing 11 is provided. The shake detection mechanism 25 can also be configured using an acceleration sensor.

  In the digital camera 10, when the control unit 21 recognizes that the shutter button 15 has been pressed, the image data of the subject image received by the light receiving surface 22 a (see FIG. 6) of the image sensor 22 through the photographing optical system 12 is recorded. To process. In the digital camera 10, an image based on the recorded image data can be appropriately displayed on the display unit 18 under the control of the control unit 21.

  Next, the configuration of the imaging unit 13 will be described with reference to FIGS. In the digital camera 10, an imaging unit 13 is provided on the inner side of the housing 11 although the illustration is omitted. As shown in FIGS. 3 to 6, the imaging unit 13 includes a fixed frame 31, a movable lens barrel 32 (see FIGS. 1 and 12) and a lens barrel base 33. As will be described later, the fixed frame 31 is integrally formed on the positive side in the Z-axis direction (subject side) of the lens barrel base 33 on which the camera shake correction mechanism 40 is provided, and has an inwardly cylindrical fixed cylinder portion 31a. Have The fixed cylinder portion 31 a is fixed to the front side (Z-axis direction positive side) of the lens barrel base 33. The lens barrel base 33 is provided with a camera shake correction mechanism 40 that corrects camera shake by moving the image sensor 22 in a plane orthogonal to the photographing optical axis OA. The configuration of the camera shake correction mechanism 40 will be described later. Although not shown in the drawings, a straight groove extending in the axial direction (Z-axis direction) and a cam groove extending obliquely with respect to the axial direction are formed on the inner peripheral surface of the fixed cylinder portion 31a.

  A movable lens barrel 32 (see FIGS. 1 and 12, etc.) is provided inside the fixed cylinder portion 31a. The movable lens barrel 32 is movable in the direction of the photographing optical axis OA with respect to the fixed barrel portion 31a in order to move the plurality of optical members of the photographing optical system 12 in the direction of the photographing optical axis OA. The movable barrel 32 is not shown clearly, but in the fixed barrel portion 31a, the movable barrel 32 rotates around the photographing optical axis OA and rotates in the direction of the photographing optical axis OA, or is photographed without rotating. It has a liner that moves in the direction of the optical axis OA, an optical member holding frame that holds each optical member of the photographing optical system 12, and the like. In the movable lens barrel 32, although not shown, a key portion and a cam follower provided on the rotating tube and the liner are inserted into the straight groove and the cam groove of the fixed tube portion 31a, so that the fixed tube portion 31a described above is inserted. It is possible to move against.

  In the movable lens barrel 32, although not shown, a gear groove is provided on the outer peripheral surface of the rotary cylinder, and the gear groove is provided on the output shaft of the motor constituting the lens barrel drive unit 23 (see FIG. 2). Gears are engaged. Although not shown, key protrusions, helicoids, and the like of optical member housing members (optical member holding frames, rotating cylinders, liners, etc.) provided inward are inserted into the inner peripheral surface of the rotating cylinder or liner. A straight groove, helicoid, etc. are provided. With such a configuration, when the driving force of the motor (not shown) is appropriately transmitted to the movable lens barrel 32 through the gear of the lens barrel driving unit 23 meshed with the gear groove, the fixed barrel portion A rotating cylinder (not shown) rotates around the photographic optical axis OA in 31a, and the rotating cylinder, liner, and optical member holding frame appropriately move in the direction of the photographic optical axis OA with respect to the fixed cylinder portion 31a.

  As a result, the imaging unit 13 shifts between the retracted retracted state (the retracted position (see FIG. 1A)) and the imaging standby state (the extended position (refer to FIG. 1B)) (advanced / retracted movement (advance and retract)) Then, each optical member (not shown) of the photographic optical system 12 (see FIG. 1B) is moved in the direction of the photographic optical axis OA in a predetermined manner, so that the fixed cylinder portion 31a is a rotating cylinder (not shown). It functions as an optical member housing member that houses each optical member (not shown) of the photographing optical system 12 (see FIG. 1B) together with a liner, an optical member holding frame, etc. (movable lens barrel 32). The movable lens barrel 32 takes the photographic light with respect to the fixed cylinder portion 31a in accordance with the transition between the retracted housing state (see FIG. 1A) and the photographing standby state (see FIG. 1B) of the optical member housing member. Functions as a movable optical member housing member that moves in the direction of the axis OA Further, the lens barrel driving unit 23 appropriately drives the optical member housing member (movable optical member housing member) by appropriately rotating the movable lens barrel 32 (its rotating barrel) with a motor (not shown). Functions as a means.

  In the imaging unit 13, although not shown in the drawing, when the imaging standby state is set (see FIG. 1B), the lens barrel drive unit 23 causes the focus lens 12b (see FIG. 5) to move the imaging optical axis OA (see FIG. 5). (Focusing optical path) and a focusing operation is performed in a predetermined manner. In the imaging unit 13, although not shown, when the retracted state is set (see FIG. 1A), the focus lens 12 b is also set to a predetermined retracted position by the lens barrel driving unit 23.

  The lens barrel base 33 of the imaging unit 13 has a plate shape parallel to the XY plane as a whole, and a movable lens barrel 32 (imaging optical system 12) movably held by a fixed frame 31, that is, a fixed cylinder portion 31a. Is provided on the negative side in the Z-axis direction (see FIG. 12). The lens barrel base 33 is provided with a holding opening 33a penetrating in the direction of the photographing optical axis OA (Z-axis direction) in a positional relationship including the photographing optical axis OA. The image pickup element 22 is provided in the holding opening 33a so as to be movable by the camera shake correction mechanism 40 (see FIG. 12 and the like).

  The camera shake correction mechanism 40 moves the operation stage 41 provided with the image sensor 22 within a plane (XY plane) perpendicular to the photographing optical axis OA direction (Z-axis direction) with respect to the lens barrel base 33. Correct camera shake. The operating stage 41 is provided in the lens barrel base 33 (its holding opening 33a), and has a movable frame portion 42 and a rotation restricting portion 43 as shown in FIGS. The movable frame portion 42 has a flat plate shape that is parallel to the XY plane as a whole, and the imaging element 22 is provided on the surface on the positive side in the Z-axis direction (subject side) (front side when viewed from the front in FIG. 6). (keeping. In this camera shake correction mechanism 40, a flexible substrate 22b (see FIG. 7) is attached to the back surface of the image sensor 22 provided in the movable frame portion 42 of the operation stage 41. The flexible substrate 22b electrically connects the image sensor 22 and the camera shake correction mechanism 40 to the control unit 21 (see FIG. 2).

  In addition, the movable frame portion 42 is provided with a vertical drive coil 44 and a vertical position detection sensor 45 (see FIG. 7) on the Y axis direction positive side as viewed from the image sensor 22, and also on the X axis direction positive side. Are provided with a horizontal drive coil 46 and a horizontal position detection sensor 47 (see FIG. 7). The vertical drive coil 44 and the horizontal drive coil 46 are coil members formed by winding an electric wire, although they are not clearly shown, and the operation stage 41 (movable frame portion 42) is attached to the lens barrel base 33 as will be described later. On the other hand, a driving force that moves parallel to the XY plane is generated.

  The vertical position detection sensor 45 detects the position of the operation stage 41 with respect to the lens barrel base 33 in the Y-axis direction in cooperation with a magnet (not shown) provided on the lens barrel base 33. In the embodiment, it is composed of a Hall element. The horizontal position detection sensor 47 detects the position of the operation stage 41 in the X-axis direction with respect to the lens barrel base 33 in cooperation with a magnet (not shown) provided on the lens barrel base 33. In this embodiment, it is composed of a Hall element. The vertical position detection sensor 45 and the horizontal position detection sensor 47 constitute the position detection mechanism 24 (see FIG. 2) described above in cooperation with a magnet (not shown) provided on the lens barrel base 33. For this reason, a state in which the photographing optical axis OA (Z-axis direction) is the horizontal direction and the Y-axis direction is the vertical direction is defined as a basic posture (normal posture) (see FIG. 1) of the digital camera 10 (housing 11). In the basic posture, the vertical position detection sensor 45 detects the position of the operation stage 41 in the vertical direction (vertical direction), that is, the image sensor 22 in cooperation with a magnet (not shown), and the horizontal position detection sensor 47 detects the magnet ( The position of the operation stage 41 in the horizontal direction, that is, the image sensor 22 is detected in cooperation with (not shown).

  Furthermore, the movable frame portion 42 is provided with three ball receiving portions 48. Each ball receiving portion 48 is formed such that the surface of the movable frame portion 42 is recessed toward the negative side in the Z-axis direction, and the positive side in the Z-axis direction is opened in a rectangular shape. Each of the ball receiving portions 48 is a portion that restricts a range of movement of a movable support ball 62 (see FIG. 5 and FIG. 8 and the like) described later with respect to the movable frame portion 42. Each ball receiving portion 48 is provided with a ball receiving plate 49 made of a magnetic material on the bottom surface (the surface on the negative side in the Z-axis direction inside the ball receiving portion 48) (see FIG. 8 and the like). The positions of the ball receiving plates 49 in the photographic optical axis OA direction (Z-axis direction) are equal to each other.

  As shown in FIG. 6, the movable frame portion 42 is attached to the rotation restricting portion 43 via a restricting shaft 51. The restriction shaft 51 has a rod shape extending in the X-axis direction and is fixed to the rotation restriction portion 43. The movable frame portion 42 supports the restriction shaft 51 so as to be movable in the X-axis direction. For this reason, the movable frame portion 42 can be moved in the X-axis direction with respect to the rotation restricting portion 43 via the restricting shaft 51. The rotation restricting portion 43 is provided with two bearing slits 52. The two bearing slits 52 are formed such that the surface of the rotation restricting portion 43 (the surface on the positive side in the Z-axis direction) is recessed toward the negative side in the Z-axis direction while extending in the Y-axis direction. A regulation pin 53 (see FIG. 5), which will be described later, can be received so as to be movable in the Z-axis direction.

  As shown in FIG. 5, the lens barrel base 33 provided with the operation stage 41 is provided with a regulation pin 53, a vertical drive magnet 54, and a horizontal drive magnet 55. The restricting pin 53 has a rod shape protruding in parallel to the Y-axis direction from the lens barrel base 33 toward the inside of the holding opening 33a, and the edge of the holding opening 33a on the Y axis direction positive side and the Y axis direction negative side. Is provided at the edge. Both restriction pins 53 are in a positional relationship corresponding to two bearing slits 52 (see FIG. 6) provided in the rotation restriction portion 43 of the operation stage 41.

  The vertical drive magnet 54 is a permanent magnet that is polarized and magnetized in the Y-axis direction, and a vertical drive coil 44 (see FIGS. 6 and 7, etc.) provided on the operation stage 41 (its movable frame portion 42). The positional relationship is opposite in the Z-axis direction. The horizontal drive magnet 55 is a permanent magnet that is polarized and magnetized in the X-axis direction, and a horizontal drive coil 46 (see FIGS. 6 and 7, etc.) provided on the operation stage 41 (its movable frame portion 42). The positional relationship is opposite in the Z-axis direction. Although not shown, the vertical drive magnet 54 and the horizontal drive magnet 55 are integrally provided with a plate-like member (yoke) made of a magnetic material on the positive side in the Z-axis direction (movable lens barrel 32 side). . A vertical yoke 56 is attached to the Z-axis negative side of the vertical drive magnet 54, and a horizontal yoke 57 is attached to the Z-axis negative side of the horizontal drive magnet 55 (see FIGS. 3 and 4).

  The vertical yoke 56 is a plate-like member made of a magnetic material formed integrally with a permanent magnet (not shown) whose opposite poles are opposite to the vertical drive magnet 54 in the Z-axis direction. The vertical yoke 56 is positioned so as to face the vertical drive magnet 54 in the Z-axis direction with the vertical drive coil 44 provided on the operation stage 41 (the movable frame portion 42) interposed therebetween (FIG. 4, FIG. 4). FIG. 5 and FIG. 7). The vertical side yoke 56 (permanent magnet formed integrally therewith) cooperates with the vertical drive coil 44 and the vertical drive magnet 54 (plate-like member formed integrally therewith) of the operation stage 41, so-called voice. Configure a coil motor.

  The horizontal yoke 57 is a plate-like member made of a magnetic material integrally formed with a permanent magnet (not shown) whose opposite poles are opposite to the horizontal drive magnet 55 in the Z-axis direction. The horizontal yoke 57 is in a positional relationship facing the horizontal drive magnet 55 in the Z-axis direction with a horizontal drive coil 46 provided on the operation stage 41 (its movable frame portion 42) interposed (FIG. 4). FIG. 5 and FIG. 7). The horizontal yoke 57 (permanent magnet formed integrally therewith) cooperates with the horizontal drive coil 46 and the horizontal drive magnet 55 (plate member formed integrally therewith) of the operation stage 41, so-called voice. Configure a coil motor.

  For this reason, in the vertical drive coil 44, when a current flows appropriately, the vertical yoke 56 (permanent magnet formed integrally therewith) and the vertical drive magnet 54 (formed integrally therewith) opposed in the Z-axis direction. A force in the Y-axis direction (hereinafter also referred to as a vertical driving force) acts on the plate member. Further, in the horizontal drive coil 46, when a current appropriately flows, a horizontal yoke 57 (permanent magnet formed integrally therewith) and a horizontal drive magnet 55 (formed integrally therewith) opposed in the Z-axis direction. A force in the X-axis direction (hereinafter also referred to as a horizontal driving force) acts on the plate member. As a result, in the camera shake correction mechanism 40, an appropriate current is supplied to the vertical drive coil 44 and the horizontal drive coil 46, so that the operation stage 41 (the movable frame portion 42) has an XY plane with respect to the lens barrel base 33. The vertical driving force and the horizontal driving force that are moved in a direction parallel to the horizontal axis (along the XY plane) can be appropriately applied. The current value that flows to the vertical drive coil 44 and the horizontal drive coil 46 is controlled by the control unit 21.

  The lens barrel base 33 is provided with installation recesses 58 at three locations. Each installation recess 58 is formed such that the back surface (surface on the negative side in the Z-axis direction) of the lens barrel base 33 is recessed toward the positive side in the Z-axis direction, and the negative side in the Z-axis direction is opened in a rectangular shape. In addition, the lens barrel base 33 is opened toward the inside of the holding opening 33a. Each installation recess 58 receives each ball receiving portion 48 of the movable frame portion 42 and restricts the range of movement of a movable support ball 62 (see FIG. 5 and FIG. 8), which will be described later, with respect to the lens barrel base 33. Become. For this reason, each installation recess 58 is in a positional relationship facing the corresponding one of the three ball receiving portions 48 provided in the operation stage 41 (its movable frame portion 42) in the Z-axis direction. (See FIG. 8).

  In each installation recess 58, a ball support plate 59 and a ball support magnet 61 are provided. Each ball support plate 59 is a flat plate member that is rectangular when viewed in the Z-axis direction, and is disposed on the bottom surface of each installation recess 58 (the surface on the positive side in the Z-axis direction inside the installation recess 58). . Each ball support plate 59 forms the same plane continuous with the bottom surface of each installation recess 58 (see FIG. 8), and the positions in the photographic optical axis OA direction (Z-axis direction) are equal to each other. Each ball support magnet 61 is formed of a permanent magnet, and is fixed so as to be embedded in the bottom surface of each installation recess 58 on the back side of each ball support plate 59, that is, on the positive side in the Z-axis direction of each ball support plate 59. (See FIGS. 8 and 12).

  As shown in FIGS. 5 and 8, a movable support ball 62 is provided on the ball support plate 59 inside each installation recess 58. Each movable support sphere 62 is a sphere made of a magnetic material and has the same size. Each movable support ball 62 is based on the size of each ball receiving portion 48 of the operation stage 41 (its movable frame portion 42) and the size of each installation recess 58 (each ball support plate 59). Is also a small diameter dimension (size dimension). Each movable support ball 62 is arranged on the corresponding ball support plate 59 (Z-axis direction negative side). Then, each movable support ball 62 faces the ball support magnet 61 via the ball support plate 59 in the Z-axis direction, so that it is attracted to and supported by the ball support plate 59, that is, the lens barrel base 33 (the back surface thereof). The At this time, each movable support ball 62 is attracted by the ball support magnet 61 and is disposed on the flat ball support plate 59, so that the ball support plate is maintained while being supported by the suction. It is possible to move while rolling on 59.

  The lens barrel base 33 having such a configuration is provided with the operation stage 41 to constitute a camera shake correction mechanism 40. That is, each regulating pin 53 of the lens barrel base 33 is inserted into each bearing slit 52 of the rotation regulating portion 43 of the operation stage 41, and each installation recess 58 of the lens barrel base 33 (movable support ball 62 arranged there). As a positional relationship in which the corresponding ball receiving portions 48 of the operation stage 41 (movable frame portion 42) are arranged, the operation stage 41 is directed from the back side of the lens barrel base 33 (see FIGS. 3 and 4). Thereby, as shown in FIG. 8, the movable support balls 62 provided on the ball support plates 59 of the respective installation recesses 58 of the lens barrel base 33 are moved to the respective ball receiving portions 48 of the movable frame portion 42 of the operation stage 41. In the Z-axis direction (photographing optical axis OA direction). Then, since each ball receiving plate 49 made of a magnetic material is provided in each ball receiving portion 48 of the movable frame portion 42 of the operation stage 41, the ball receiving plate 49 is supported by the movable support ball 62 and the ball support. By facing the ball support magnet 61 in the Z-axis direction via the plate 59, the movable frame portion 42, that is, the operation stage 41 is attracted and supported by each ball support plate 59, that is, the lens barrel base 33 (the back surface). The

  At this time, each ball receiving plate 49 has a flat plate shape and is attracted by the magnetic force of the ball support magnet 61, so that the operation stage 41 is supported by the magnetic force while maintaining the state supported by the lens barrel base 33. The sphere 62 can move while relatively rolling. Further, as described above, the ball receiving plates 49 have the same size and the same size, and the ball receiving plates 49 are positioned at the same position in the Z-axis direction on the operation stage 41 (movable frame portion 42). The ball support plates 59 are at equal positions in the Z-axis direction on the lens barrel base 33 (the back surface thereof). For this reason, the operation stage 41 (movable frame portion 42) is in the photographic optical axis OA direction (Z-axis direction) with respect to the lens barrel base 33 by three movable support balls 62 provided between the lens barrel base 33 and the movable stage 41. The lens barrel base 33 is supported along a plane (XY plane) perpendicular to the optical axis, that is, smoothly and stably movable in the direction orthogonal to the optical axis, and in the photographing optical axis OA direction (Z-axis direction). The position with respect to is properly defined. Since this operation stage 41 is disposed in the holding opening 33a of the lens barrel base 33, the movable stage 41 can be moved with respect to the lens barrel base 33 in a direction parallel to the XY plane (correction moving region described later). CA (see FIG. 15)) is defined by the holding opening 33a (the inner peripheral surface thereof) and the operation stage 41 (a first outer peripheral surface 41c (see FIG. 12 etc.) of the first plate-like portion 41a described later).

  At this time, the movable frame portion 42 can be moved in the X-axis direction with respect to the rotation restricting portion 43 by way of the restricting shaft 51, and the rotation restricting portion 43 is supported by each bearing slit 52 in the lens barrel base 33. Therefore, when the operation stage 41 is moved in a direction parallel to the XY plane, the Z axis direction is centered with respect to the lens barrel base 33. It is prevented from rotating. Thereby, the imaging device 22 held by the operation stage 41 is parallel to the XY plane within a predetermined range with respect to the lens barrel base 33, that is, the imaging optical system 12 (its imaging optical axis OA) of the imaging unit 13. Can be moved in any direction (perpendicular to the optical axis).

  In this state, as described above, the vertical yoke 56 (permanent magnet formed integrally therewith) and the vertical drive magnet 54 (plate member formed integrally therewith) provided on the lens barrel base 33. ), A vertical drive coil 44 provided on the movable frame portion 42 of the operation stage 41 is present, and a horizontal yoke 57 provided on the lens barrel base 33 (permanent magnet formed integrally therewith). ) And a horizontal drive magnet 55 (a plate member formed integrally therewith), there is a horizontal drive coil 46 provided in the movable frame portion 42 of the operation stage 41 (FIGS. 4, 5 and (See FIG. 7). Therefore, with respect to the lens barrel base 33, that is, the imaging optical system 12 (its imaging optical axis OA) of the imaging unit 13, an XY plane within a predetermined range (correction moving area CA (see FIG. 15 described later)). Since the vertical driving force and the horizontal driving force can be appropriately applied to the operation stage 41 (movable frame portion 42) that is movable along the movement direction, the camera shake correction mechanism 40 operates under the control of the control unit 21. The image sensor 22 held by the stage 41, that is, the movable frame portion 42, can be moved in a direction parallel to the XY plane. Note that the position of the operation stage 41 (movable frame portion 42) in a direction parallel to the XY plane in a predetermined range (correction moving area CA) is controlled by using both voice coil motors in this way. The state, that is, the state where the operation stage 41 (movable frame portion 42) is at an arbitrary position in the predetermined range (correction moving area CA) by controlling the current applied to the vertical drive coil 44 and the horizontal drive coil 46, Hereinafter, it is referred to as electrical holding.

  For this reason, in the imaging unit 13 of the present embodiment, the lens barrel base 33 (the fixed frame 31 fixed thereto) functions as a fixing member provided in the housing 11 with its position relative to the photographing optical axis OA fixed. . Further, the operation stage 41 (movable frame portion 42) functions as a movable member that is movable along the XY plane with respect to the lens barrel base 33 and provided with the imaging element 22. Further, the vertical drive coil 44 and the horizontal drive coil 46 provided on the operation stage 41 (movable frame portion 42) are provided on the movable member so as to generate a driving force for moving the movable member relative to the fixed member. The vertical drive magnet 54, the horizontal drive magnet 55, the vertical side yoke 56, and the horizontal side yoke 57 provided on the lens barrel base 33 function as a movable side drive mechanism, and move the movable member relative to the fixed member. In order to generate the driving force to be moved, the movable side drive mechanism unit functions as a fixed side drive mechanism unit provided on the fixed member so as to exist on both sides of the movable side drive mechanism unit viewed in the direction of the photographing optical axis OA. .

  Next, the characteristic part of the imaging unit 13 (digital camera 10 equipped with the imaging unit 13) as an example of the imaging unit according to the present invention will be described with reference to FIGS. FIG. 9 is an explanatory view schematically showing the operation stage 41 (the movable frame portion 42 and the rotation restricting portion 43) described above in a simplified manner, and (a) is a view from the Z axis direction positive side (subject side). (B) shows a state seen from the Z axis direction negative side, and (c) shows a state seen from the Y axis direction negative side. FIG. 10 is an explanatory diagram schematically showing the lens barrel base 33 described above as viewed from the negative side in the Z-axis direction as in FIG. FIG. 11 is an explanatory diagram schematically illustrating the above-described imaging unit 13 as seen from the Z-axis direction negative side in the same manner as FIG. FIG. 12 is a schematic explanatory view showing the imaging unit 13 in a cross section passing through the two movable support balls 62 and the photographing optical axis OA, where (a) shows the retracted position and (b) shows the extended position. . FIG. 13 is an explanatory diagram for explaining how the movement of the operation stage 41 in the direction parallel to the XY plane with respect to the lens barrel base 33 is limited by the first stopper 64, and FIG. FIG. 2B shows a state that exists at the end on the Y axis direction positive side, and (b) shows a state that exists at the end on the positive side in the X axis direction and at the end on the negative side in the Y axis direction. (C) shows an end on the negative side in the X-axis direction and the end on the negative side in the Y-axis direction, and (d) shows an end on the negative side in the X-axis direction and in the Y-axis direction. A state of being present at the end on the positive side is shown. FIG. 14 is an explanatory diagram for explaining the movement of the operation stage 41 in the direction parallel to the XY plane with respect to the lens barrel base 33 by the second stopper 65. FIG. (B) shows the state existing at the end on the positive side in the X-axis direction, (c) shows the state present at the end on the negative side in the Y-axis direction, d) shows a state of being present at the end on the negative side in the X-axis direction. FIG. 15 is an explanatory diagram showing the correction moving area CA defined by the first stopper 64 and the limited moving area RA defined by the second stopper 65 superimposed on the lens barrel base 33 similar to FIG.

  9 to 15, for easy understanding, the configuration of the characteristic part of the imaging unit 13 is simplified as follows, and the positional relationship described above, each figure, and the actual configuration are not necessarily described. It doesn't match. 9 and 11, the operation stage 41 (the movable frame portion 42 and the rotation restricting portion 43) is shown as a single member having a rectangular shape as a whole, and the vertical drive coil 44 and the side on the Y axis direction positive side are shown. The vertical position detection sensor 45 is arranged in parallel in the Y-axis direction and sandwiched between the two ball receiving portions 48, and the horizontal drive coil 46 and the horizontal position detection sensor 47 are arranged on the X axis direction positive side in the X axis direction. The remaining one ball receiving portion 48 is shown on the Y axis direction negative side. 10, FIG. 11, and FIG. 13 to FIG. 15, the holding opening 33a of the lens barrel base 33 is shown as a rectangular shape that matches the rectangular operation stage 41, and the holding opening 33a is an XY plane. And a vertical drive coil 44, a vertical position detection sensor 45, a horizontal drive coil 46, a horizontal position detection sensor 47, and each ball receiver. It is assumed that the portion 48 does not hit in a direction parallel to the XY plane. 10, 11, and 13 to 15, the vertical drive coil 44, the vertical position detection sensor 45, the horizontal drive coil 46, the horizontal position detection sensor 47, and each ball receiving portion 48 are partially configured. Is hidden behind the holding opening 33a (on the positive side in the Z-axis direction). Further, in FIG. 10, each installation recess 58 of the lens barrel base 33 is indicated by a ball support plate 59. Next, in FIG. 11, the restriction shaft 51 of the movable frame portion 42 (operation stage 41), the both bearing slits 52 of the rotation restriction portion 43 (operation stage 41), the restriction pin 53 of the lens barrel base 33, and the vertical side yoke 56. The horizontal yoke 57 is omitted. In FIG. 13, for easy understanding, the vertical drive coil 44, vertical position detection sensor 45, horizontal drive coil 46, horizontal position detection sensor 47, and each ball receiving portion 48 in the operation stage 41 (movable frame portion 42) are shown. It is indicated by a two-dot chain line. In FIG. 14, for easy understanding, the vertical drive coil 44, the vertical position detection sensor 45, the horizontal drive coil 46, the horizontal position detection sensor 47, and each ball receiver in the operation stage 41 (movable frame portion 42) are further illustrated in FIG. While being abbreviate | omitted as the part 48, the 1st plate-shaped part 41a is shown with the dashed-two dotted line.

  As shown in FIG. 9, in the imaging unit 13 (camera shake correcting mechanism 40), as described above, the operation stage 41 (movable frame portion 42) is provided with the three ball receiving portions 48 and the vertical drive coil. 44, a vertical position detection sensor 45, a horizontal drive coil 46, and a horizontal position detection sensor 47 are arranged. The operation stage 41 (movable frame portion 42) has a plate-like shape as a whole and forms the outer shape of the operation stage 41 (movable frame portion 42), and protrudes from the first plate-like portion 41a to the positive side in the Z-axis direction. And a second plate-like portion 41b having a plate shape.

  Since the first plate-like portion 41 a forms the outer shape of the operation stage 41 (movable frame portion 42), it is a plate member having a rectangular shape when viewed in the Z-axis direction in FIGS. 9 to 15. The first plate-like portion 41a has first intervals La1 and La2 (described later in FIG. 12A) in a direction parallel to the XY plane, inside the holding opening 33a (see FIG. 10) of the lens barrel base 33. The size is such that it can be placed and placed. The first intervals La1 and La2 will be described later. A second plate portion 41b is provided integrally with the first plate portion 41a.

  The second plate-like portion 41b has a plate-like shape provided so as to protrude from the first plate-like portion 41a toward the subject side when viewed in the Z-axis direction positive side, that is, in the photographing optical axis OA direction. 22 is provided. In other words, the second plate-like portion 41b protrudes from the first plate-like portion 41a to the positive side in the Z-axis direction so as to surround the image pickup device 22 in the operation stage 41 (movable frame portion 42). The place to be provided is formed. As described above, the second plate-like portion 41b is held so that the operation stage 41 (movable frame portion 42) can move in the optical axis orthogonal direction (direction parallel to the XY plane) with respect to the lens barrel base 33. In the closed state (see FIG. 12), the Z-axis direction (shooting optical axis OA) is provided so as to be present inside the fixed cylinder portion 31a of the fixed frame 31 formed integrally with the lens barrel base 33. The amount of protrusion from the first plate-like portion 41a in the direction) is set. Further, the second plate-like portion 41b is placed in the XY plane inside the movable barrel 32 (movable optical member housing member) at the retracted position in the state of being held in that way (see FIG. 12). The size is such that the second gaps Lb1 and Lb2 (see FIG. 12B) can be placed in parallel directions. In the present embodiment, the second plate-like portion 41b has a rectangular shape when viewed in the Z-axis direction, and a first described later of the movable lens barrel 32 via an elastic member 63 (see FIGS. 10 and 12, etc.) described later. The cylindrical member 32a (see FIG. 12) and a size that can be arranged with second intervals Lb1 and Lb2 (see FIG. 12B) in a direction parallel to the XY plane. . The second intervals Lb1 and Lb2 will be described later.

  As shown in FIG. 10, in the imaging unit 13 (camera shake correcting mechanism 40), as described above, the operating stage 41 (movable frame portion 42) can be moved in the direction parallel to the XY plane on the lens barrel base 33. A holding opening 33a is provided for distribution. The holding opening 33a is sized so that the first plate-like portion 41a of the operation stage 41 (movable frame portion 42) can be movably received in a direction parallel to the XY plane. 10, the first plate-like portion 41a is adapted to be rectangular when viewed in the Z-axis direction. In the lens barrel base 33, there is a window hole 33 b that connects an inner space of the holding opening 33 a and an inner space of the fixed cylinder portion 31 a of the fixed frame 31 formed integrally with the lens barrel base 33. Is provided. The window hole 33b has a size that does not contact the second plate-like portion 41b regardless of the movement of the operation stage 41 (movable frame portion 42) in the direction parallel to the XY plane with respect to the lens barrel base 33. It is a dimension.

  In the lens barrel base 33, a ball support plate 59 disposed in three installation recesses 58 is provided so as to surround the window hole 33b, and a vertical drive magnet 54 and a horizontal drive magnet 55 are provided. Yes. Each ball support plate 59 is provided with a movable support ball 62. In the lens barrel base 33, when viewed from the negative side in the Z-axis direction (image plane side in the photographing optical axis OA direction), the movable lens barrel provided inside the fixed cylinder portion 31a of the fixed frame 31 from the window hole 33b. 32 (movable optical member housing member).

  As shown in FIGS. 11 and 12, in the imaging unit 13 (camera shake correcting mechanism 40), as described above, the operation stage 41 (movable frame portion 42) is adsorbed and supported by the lens barrel base 33 with a magnetic force. . In the imaging unit 13 (camera shake correcting mechanism 40), the movable support ball 62 provided on each ball support plate 59 of the lens barrel base 33 moves while rolling on the ball support plate 59, and the movable frame portion 42. Are moved on the ball receiving plate 49 while rolling on the ball receiving plate 48, so that the operation stage 41 (movable frame portion 42 (the image pickup element held therein) is held inside the holding opening 33a of the barrel base 33. 22)) is movable in a direction parallel to the XY plane (a direction perpendicular to the optical axis) with respect to the lens barrel base 33 (its holding opening 33a). The operation stage 41 (movable frame portion 42 (imaging element 22)) is perpendicular to the vertical yoke 56 of the lens barrel base 33, the vertical drive magnet 54 (see FIG. 10), and the operation stage 41 (movable frame portion 42) therebetween. A vertical driving force is appropriately applied by the driving coil 44, and the horizontal side yoke 57 and the horizontal driving magnet 55 (see FIG. 10) of the lens barrel base 33 and the horizontal driving coil 46 of the operation stage 41 (movable frame portion 42) therebetween. Accordingly, a vertical driving force is appropriately applied to move the lens barrel base 33 (holding opening 33a) in a direction parallel to the XY plane.

  As described above, the movable lens barrel 32 is appropriately moved in the direction of the photographing optical axis OA in the inside of the fixed barrel portion 31a of the fixed frame 31 in which the lens barrel base 33 is integrally formed. In FIG. 10 and FIG. 12, etc., as the movable lens barrel 32, a first cylindrical member 32a fitted inside the fixed cylindrical portion 31a, a second cylindrical member 32b fitted inside the fixed cylindrical portion 31a, Is shown. The first cylindrical member 32a and the second cylindrical member 32b are rotating cylinders that move in the direction of the photographing optical axis OA while rotating about the photographing optical axis OA, and in the direction of the photographing optical axis OA without rotating. Or an optical member holding frame that holds each optical member of the photographing optical system 12.

  In the present embodiment, the first cylindrical member 32a moves from the fixed barrel portion 31a to the subject side (Z-axis direction positive side) in the direction of the photographic optical axis OA when the movable barrel 32 is in the extended position (shooting standby state). When the movable lens barrel 32 is in the retracted position (collapsed retracted state), the image surface side in the photographic optical axis OA direction (Z-axis direction negative side) is drawn out to the extended position (see FIG. 12A). To the retracted position (see FIG. 12B). In this retracted position, the rear end position 32c of the first cylindrical member 32a (the end on the image plane side in the photographing optical axis OA direction (end on the negative side in the Z-axis direction)) is the rear end position of the fixed cylindrical portion 31a. The positional relationship is aligned with (the image plane side in the photographic optical axis OA direction (Z-axis direction negative side)). For this reason, when the first cylindrical member 32a is in the retracted position, the rear end portion 32c is connected to the second plate-like portion 41b (a second outer peripheral surface 41d to be described later) of the operating stage 41 (movable frame portion 42). It is opposed in a direction parallel to the XY plane.

  An elastic member 63 is provided at the rear end portion 32c. The elastic member 63 prevents the second plate-like portion 41b and the rear end portion 32c of the operation stage 41 (movable frame portion 42) from directly contacting each other while preventing the second plate-like portion 41b and the rear end portion 32c from contacting each other. It is provided to absorb the shock when hitting. For this reason, the elastic member 63 is formed of a material that can be elastically deformed when the second plate-like portion 41b and the rear end portion 32c abut against each other. In this embodiment, the elastic member 63 is attached over the entire circumference of the inner peripheral wall surface of the rear end portion 32c of the first cylindrical member 32a (see FIG. 10 and the like). In this embodiment, the elastic member 63 is formed integrally with the first cylindrical member 32a using a mold and is provided at the rear end portion 32c. In addition, as long as the elastic member 63 is attached to the 1st cylindrical member 32a (rear end location 32c), it may be adhere | attached or welded and it is not limited to a present Example.

  In this embodiment, the second cylindrical member 32b fitted inward of the first cylindrical member 32a is the first cylindrical member 32a when the movable lens barrel 32 is in the extended position (photographing standby state). Are further extended to the subject side (Z-axis direction positive side) in the direction of the photographing optical axis OA to be the extended position (see FIG. 12A), and the movable lens barrel 32 is set to the retracted position (collapsed retracted state). Then, it moves to the image plane side (Z-axis direction negative side) in the photographic optical axis OA direction and is retracted into the first cylindrical member 32a to be the retracted position (see FIG. 12B). As shown in FIG. 12B, when the second cylindrical member 32b is in the retracted position, the tip (end on the subject side (Z-axis direction positive side) in the direction of the photographing optical axis OA) is the first cylinder. The rear end (the end on the image plane side in the photographing optical axis OA direction (the Z-axis direction negative side)) reaches the rear end portion 32c of the first cylindrical member 32a. It is supposed not to be. For this reason, the elastic member 63 provided at the rear end portion 32c of the first cylindrical member 32a is prevented from obstructing the movement of the second cylindrical member 32b to the retracted position.

  Due to such a configuration, in the imaging unit 13 (camera shake correcting mechanism 40), as shown in FIG. 12, the first plate-like portion 41a (the XY plane thereof) of the operating stage 41 (movable frame portion 42) is provided. The first outer peripheral surface 41c) present in the parallel direction (optical axis orthogonal direction) is the inner periphery of the opening present in the holding opening 33a of the lens barrel base 33 (in the direction parallel to the XY plane (optical axis orthogonal direction)). It faces the surface 33c) in a direction parallel to the XY plane. In the opposed first outer peripheral surface 41c and opening inner peripheral surface 33c, one of the intervals seen in the same radial direction from the photographing optical axis OA is defined as a first interval La1, and the other of the intervals is set as a first interval. Let it be La2.

  When the movable lens barrel 32 is in the retracted position (collapsed retracted state), the second plate-like portion 41b of the operating stage 41 (movable frame portion 42) (the second existing in the direction parallel to the XY plane) The outer peripheral surface 41d is a rear end portion 32c of the first cylindrical member 32a in the retracted position (in this embodiment, an elastic member 63 provided there (in the direction parallel to the XY plane). The peripheral surface 63a) is opposed to the XY plane in a direction parallel to the XY plane. In the opposed second outer peripheral surface 41d and the inner peripheral surface 63a of the elastic member 63, one of the intervals seen in the same radial direction as the first interval La1 and the first interval La2 is defined as a second interval Lb1. The other of the intervals is a second interval Lb2.

  Further, when the movable lens barrel 32 is set to the extended position (photographing standby state), the first cylindrical member 32a (movable lens barrel 32) is set to the extended position, whereby the operation stage 41 (movable frame portion 42). The second plate-like portion 41b (the second outer peripheral surface 41d) is disposed in the fixed barrel portion 31a of the fixed frame 31 into which the movable lens barrel 32 is fitted inward (in the cylinder portion existing in the direction parallel to the XY plane). The peripheral surface 31b) is opposed in a direction parallel to the XY plane. In the opposed second outer peripheral surface 41d and the cylindrical inner peripheral surface 31b of the fixed cylindrical portion 31a, the same radial direction as the first interval La1 (second interval Lb1) and the first interval La2 (second interval Lb2) One of the intervals viewed in step 3 is set as a third interval Lc1, and the other of the intervals is set as a third interval Lc2.

  The intervals are set so as to satisfy the following expression (1) regardless of the position of the operation stage 41 (movable frame portion 42) with respect to the lens barrel base 33 (holding opening 33a).

Lc1 + Lc2> La1 + La2> Lb1 + Lb2 (1)
In addition, this interval is expressed by the following formulas (2) and (3) when the center position of the operation stage 41 (movable frame portion 42) and the center position of the holding opening 33a of the lens barrel base 33 are matched. It is set to satisfy.

Lc1>La1> Lb1 (2)
Lc2>La2> Lb2 (3)
Although the illustration of the intervals is not clearly shown, the above formulas (1), (2), and (3) are satisfied with respect to all the radiation directions from the photographing optical axis OA.

  Thus, the operation stage 41 (movable frame portion 42) basically has the first outer peripheral surface 41c of the first plate-like portion 41a abutting against the inner peripheral surface 33c of the holding opening 33a of the lens barrel base 33. The movement in the direction perpendicular to the optical axis (the direction parallel to the XY plane) with respect to the lens barrel base 33 (holding opening 33a) is restricted. Therefore, the first plate-like portion 41a (the first outer peripheral surface 41c) of the operation stage 41 (movable frame portion 42) and the holding opening 33a (the inner peripheral surface 33c thereof) of the lens barrel base 33 are the lens base. It functions as a first stopper 64 that defines a movable range of the operation stage 41 with respect to 33 in the direction perpendicular to the optical axis (direction parallel to the XY plane). In the first stopper 64, the first plate-like portion 41a (its first outer peripheral surface 41c) functions as a first stopper portion on the movable side, and the holding opening 33a (its inner peripheral surface 33c) is the first on the fixed side. Functions as a stopper.

  Therefore, as shown in FIG. 13, the operation stage 41 (movable frame portion 42) is an end portion on the positive side in the X-axis direction up to the position shown in FIG. Can move to the end on the side, and can move to the end on the positive side in the X-axis direction and the end on the negative side in the Y-axis up to the position shown in (b). It can move to the end on the negative side in the X-axis direction and to the end on the negative side in the Y-axis up to the position shown, and the end on the negative side in the X-axis direction to the position shown in FIG. It can move to the end on the positive direction side. Thereby, the range in which the operation stage 41 (movable frame portion 42) can move in the direction perpendicular to the optical axis (direction parallel to the XY plane) with respect to the lens barrel base 33 is within the first stopper 64 (holding opening 33a ( The opening inner peripheral surface 33c) and the first plate-like portion 41a (the first outer peripheral surface 41c)) are defined by the positions where they abut. Hereinafter, this is referred to as a correction moving area CA (see FIG. 15). In the example illustrated in FIG. 15, the correction moving area CA is equal to the holding opening 33a due to the above-described simplification of FIGS. It becomes. Therefore, the operation stage 41 (movable frame portion 42) basically has a correction moving region in the direction orthogonal to the optical axis (direction parallel to the XY plane) with respect to the lens barrel base 33 (its holding opening 33a). It is movable within the range of CA, that is, within the range of (first interval La1 + first interval La2).

  When the movable lens barrel 32 is in the retracted position (collapsed retracted state), the second outer peripheral surface 41d of the second plate-like portion 41b of the operating stage 41 (movable frame portion 42) is the first retracted position. It faces the inner peripheral surface 63a of the elastic member 63 at the rear end portion 32c of the cylindrical member 32a in the optical axis orthogonal direction (direction parallel to the XY plane) (see FIG. 12B). Since each interval described above is set so as to satisfy the above formulas (1), (2), and (3) with respect to all the radiation directions from the photographing optical axis OA, the limitation by the first stopper 64, that is, Before the holding opening 33a (opening inner peripheral surface 33c) and the first plate-like portion 41a (first outer peripheral surface 41c) contact each other, the elastic member of the second outer peripheral surface 41d of the second plate-like portion 41b and the rear end portion 32c. 63 will be in contact with the inner peripheral surface 63a of 63 (see FIG. 12B and FIG. 14). As a result, when the movable lens barrel 32 is set to the retracted position (collapsed retracted state), the second outer peripheral surface 41d of the second plate-like portion 41b of the operating stage 41 (movable frame portion 42) becomes the first cylindrical member. By hitting the inner peripheral surface 63a of the elastic member 63 at the rear end portion 32c of 32a, movement in the direction parallel to the XY plane with respect to the lens barrel base 33 (holding opening 33a) is restricted. Therefore, the second plate-like portion 41b (the second outer peripheral surface 41d) of the operation stage 41 (movable frame portion 42) and the elastic member 63 (the inner peripheral surface 63a) of the rear end portion 32c of the first cylindrical member 32a. Functions as a second stopper 65 that defines a movable range of the operation stage 41 with respect to the lens barrel base 33 in a direction perpendicular to the optical axis (direction parallel to the XY plane). In the second stopper 65, the second plate-like portion 41b (its second outer peripheral surface 41d) functions as a movable second stopper portion, and the elastic member 63 (the inner peripheral surface 63a) of the first cylindrical member 32a. Functions as a second stopper portion on the housing member side (fixed side).

  Therefore, as shown in FIG. 14, the operation stage 41 (movable frame portion 42) has an end portion on the positive side in the Y-axis direction up to the position shown in (a) in the elastic member 63 of the first cylindrical member 32a. Can move to the end on the X-axis direction positive side to the position shown in (b), and can move to the end on the Y-axis direction negative side to the position shown in (c). It is possible to move to the end portion on the negative side in the X-axis direction up to the position shown in (d). As a result, the movable stage 41 (movable frame portion 42) can move in the direction parallel to the XY plane with respect to the lens barrel base 33 within the second stopper 65 (the elastic member 63 of the first tubular member 32a). It is defined by the position where (the inner peripheral surface 63a) and the second plate-like portion 41b (the second outer peripheral surface 41d) hit each other. Hereinafter, this will be referred to as a restricted movement area RA (see FIG. 15). In the example shown in FIG. 15, the restricted movement area RA becomes rectangular as a whole due to the above-described simplification of FIGS. Becomes a shape along the inner peripheral shape of the first cylindrical member 32a (elastic member 63). The limited movement area RA is formed inside the correction movement area CA according to the settings satisfying the above-described equations (1), (2), and (3) for each interval. Therefore, when the movable barrel 32 is in the retracted position (collapsed retracted state), the operation stage 41 (movable frame portion 42) is perpendicular to the optical axis (X−) with respect to the lens barrel base 33 (its holding opening 33a). In the direction parallel to the Y plane, the movement is allowed within the limited movement area RA, that is, within the range of (second interval Lb1 + second interval Lb2). For this reason, the second stopper 65 that defines the limit movement area RA functions as a limit stopper that limits the movable range of the operation stage 41 (movable frame portion 42) to a range smaller than the correction movement area CA.

  Further, when the movable barrel 32 is set to the extended position (photographing standby state), the first cylindrical member 32a is set to the extended position, whereby the second plate-like portion 41b of the operation stage 41 (movable frame portion 42). The second outer peripheral surface 41d is opposed to the cylindrical inner peripheral surface 31b of the fixed cylindrical portion 31a of the fixed frame 31 in the optical axis orthogonal direction (direction parallel to the XY plane) (see FIG. 12A). . Since each interval described above is set so as to satisfy the above formulas (1), (2), and (3) with respect to all the radiation directions from the photographing optical axis OA, the second plate-like portion 41b ( Before the second outer peripheral surface 41d and the fixed cylindrical portion 31a (cylinder inner peripheral surface 31b) contact, the first stopper 64, that is, the holding opening 33a (opening inner peripheral surface 33c) and the first plate-like portion 41a (first outer peripheral surface). Surface 41c) (see FIG. 13). For this reason, the operation stage 41 (movable frame portion 42) is within the range of the correction moving area CA in the direction orthogonal to the optical axis (direction parallel to the XY plane) with respect to the lens barrel base 33 (its holding opening 33a). Within the range, that is, within the range of (first interval La1 + first interval La2). In other words, the second plate-like portion 41b (second outer peripheral surface 41d) of the operation stage 41 (movable frame portion 42) is the optical axis of the operation stage 41 (movable frame portion 42) inside the correction moving area CA. Preventing movement in the orthogonal direction (direction parallel to the XY plane) is prevented.

  In the camera shake correction mechanism 40 (control unit 21), on the XY plane with respect to the center position of the operation stage 41 having a substantially rectangular shape in the correction moving area CA (within the range limited by the first stopper 64). The origin position at is set. In the present embodiment, the origin position is coincident with the center position in the correction moving area CA described above and is located on the photographing optical axis OA. The origin position (the data) is stored in a storage unit 21a (see FIG. 2) provided in the control unit 21, and can be appropriately acquired by the control unit 21.

  Further, in the camera shake correction mechanism 40, when the movable lens barrel 32 is set to the extended position (photographing standby state), the shake from the camera shake detection mechanism 25 (see FIG. 2) is controlled under the control of the control unit 21 (see FIG. 2). Based on the detection information, a movement target position based on the center position of the operation stage 41 is set in the correction movement area CA, and a movement direction and a movement amount from the origin position to the movement target position are calculated. The current applied to the vertical drive coil 44 and the horizontal drive coil 46 is controlled so as to move the operation stage 41 by the moving amount. By this control, a horizontal driving force and a vertical driving force are appropriately applied, and the operation stage 41, that is, the imaging device 22 is moved on the XY plane in the correction moving area CA with respect to the imaging optical axis OA (lens barrel base 33). Can be moved to a predetermined position. At this time, the control unit 21 (see FIG. 2) causes the position detection mechanism 24 (see FIG. 2), that is, the vertical position detection sensor 45 and the horizontal position detection sensor to appropriately move the operation stage 41 to the set movement target position. Servo control is performed using the position detection information of the operation stage 41 from 47 (see FIG. 11 etc.) as feedback information.

  Therefore, in the digital camera 10, that is, the camera shake correction mechanism 40, when the movable lens barrel 32 is set to the extended position (shooting standby state), the control unit 21 controls the applied current to the vertical drive coil 44 and the horizontal drive coil 46. Then, the operating stage 41 is moved on the XY plane in the correction moving area CA so as to cancel the camera shake (see FIG. 13), and the image sensor 22 provided on the operating stage 41 is used to move the subject image due to the camera shake. The camera shake correction can be performed by following the movement. Further, in the digital camera 10, that is, the camera shake correction mechanism 40, the control unit 21 calculates the applied current to the vertical drive coil 44 and the horizontal drive coil 46 based on the data of the origin position stored in the storage unit 21 a (see FIG. 2). By controlling, the operation stage 41, that is, the image sensor 22 can be moved to the origin position set on the photographing optical axis OA and maintained at the origin position (electrical holding described above). be able to.

  In the camera shake correction mechanism 40 (control unit 21), when the movable lens barrel 32 is in the retracted position (collapsed retracted state), the optical stage orthogonal direction (XY plane) of the operating stage 41 (movable frame portion 42). The movable range in the (parallel direction) becomes a limited movement area RA smaller than the correction movement area CA due to the restriction of the second stopper 65. In this state, the position restricted by the second stopper 65, that is, the elastic member 63 (the inner peripheral surface 63a) of the first cylindrical member 32a and the second plate-like portion 41b (the movable frame portion 42) of the second stage 41b (the movable frame portion 42). The contact with the second outer peripheral surface 41d) restricts the movement of the operation stage 41 (movable frame portion 42) in the direction perpendicular to the optical axis with respect to the lens barrel base 33. In this state, since the limited movement area RA due to the restriction of the second stopper 65 is smaller than the correction movement area CA, even if the operation stage 41 (movable frame portion 42) moves unintentionally, it is caused by that. Impact can be suppressed. The second stopper 65 that defines the restricted movement area RA includes the second plate portion 41b (second outer peripheral surface 41d) of the operation stage 41 (movable frame portion 42) and the elastic member 63 of the first tubular member 32a. (The inner peripheral surface 63a), the impact due to the movement of the operation stage 41 (movable frame portion 42) can be absorbed by the elastic member 63.

  Next, a transition operation from the photographing standby state to the retracted storage state in the digital camera 10 of the present embodiment will be described. FIG. 16 is a flowchart showing an example of the contents of control processing of the transition operation from the photographing standby state to the retracted storage state in the control unit 21 (see FIG. 2) that comprehensively controls the operation of the digital camera 10 (imaging unit 13). It is. Below, each step of the flowchart of FIG. 16 which is an example of the control processing in the control part 21 in the transition operation | movement from this imaging | photography stand-by state to a retracted storage state is demonstrated.

  First, in the digital camera 10, the movable lens barrel 32 is set to the extended position (shooting standby state) in the shooting standby state in which the power button 14 (see FIG. 1 and the like) is turned on (operating state). As described above, the actuating stage 41 (movable frame portion 42), that is, the image sensor 22 is used for correction in the direction perpendicular to the optical axis (the direction parallel to the XY plane) with respect to the lens barrel base 33 (its holding opening 33a). It can move within the range of the movement area CA (see FIG. 15). For this reason, in the digital camera 10, the operation stage 41 (movable frame portion 42), that is, the image sensor 22 can be appropriately moved on the XY plane within the correction moving area CA by the camera shake correction mechanism 40. Therefore, camera shake correction can be performed.

  In step S11, when the power button 14 (see FIG. 1 etc.) of the digital camera 10 is turned off (non-operating state), in order to change to the retracted storage state, that is, to shift from the imaging standby state to the retracted storage state. Proceed to step S12.

  In step S12, since the power button 14 (see FIG. 1 and the like) is turned off (non-operating state) in step S11, the operation stage 41 (movable frame portion 42) is controlled to be electrically held at the origin position. Start and go to step S13. In this step S12, in the state of electrical holding by the camera shake correction mechanism 40, the operation stage 41 (movable frame portion 42 (imaging element 22)) is moved to the origin position set on the optical axis and at the origin position. Initiate control to keep being present. That is, in step S12, the current applied to the vertical drive coil 44 and the horizontal drive coil 46 (see FIG. 11 and the like) is controlled based on the origin position data stored in the storage unit 21a (see FIG. 2). The operation stage 41 (movable frame portion 42) is electrically held at the origin position.

  In step S13, since control for electrically holding the operation stage 41 (movable frame portion 42) at the origin position is started in step S12, control for bringing the imaging unit 13 into the retracted storage state is started, and the process proceeds to step S14. move on. In step S13, the lens barrel drive unit 23 (see FIG. 2) is driven to control the image pickup unit 13 from the shooting standby state (see FIG. 1B and FIG. 12A) to the retracted storage state (see FIG. 1B). 1 (a) and 12 (b)). Then, since the movable lens barrel 32 is set to the retracted position (collapsed retracted state), the first cylindrical member 32a and the second cylindrical member 32b are set to the retracted position, and therefore the first cylindrical member 32a. The elastic member 63 (its inner peripheral surface 63a) and the second plate-like portion 41b (the second outer peripheral surface 41d) of the operation stage 41 (movable frame portion 42) held at the origin position are orthogonal to the optical axis ( In the direction parallel to the XY plane). As a result, the movement of the operating stage 41 (movable frame portion 42) relative to the lens barrel base 33 (its holding opening 33a) in the direction perpendicular to the optical axis is limited by the second stopper 65, and the movable range is corrected. The restricted movement area RA (see FIG. 15) is smaller than the area CA.

  In step S14, following the start of the control for setting the imaging unit 13 in the retracted position in step S13, the electrical holding of the operation stage 41 (movable frame portion 42) is stopped, and this flowchart is ended. In step S14, electrical holding by the camera shake correction mechanism 40 is stopped, that is, application of current to the vertical drive coil 44 and the horizontal drive coil 46 (see FIG. 11 and the like) is stopped. At this time, in step S13, the movable range in the direction parallel to the XY plane with respect to the lens barrel base 33 (its holding opening 33a) of the operating stage 41 (movable frame portion 42) is limited by the second stopper 65. Since RA (see FIG. 15) is used, even if the operation stage 41 (movable frame portion 42) moves unintentionally, the resulting impact is suppressed. In this embodiment, when the imaging unit 13 is set to the retracted position in step S13, if the first cylindrical member 32a is set to the retracted position in the course of the operation, the operation stage 41 (movable frame portion 42) in step S14. ) Stop electrical holding. This is to reduce power consumption while preventing the operation stage 41 (movable frame portion 42) from freely moving in the correction movement area CA. With this transition operation from the photographing standby state to the retracted storage state, in the digital camera 10 (see FIGS. 1 and 2), the photographing optical system 12 is in the retracted storage state, and the image display on the display unit 18 is stopped.

  Next, the transition operation from the retracted storage state to the shooting standby state in the digital camera 10 of the present embodiment will be described. FIG. 17 is a flowchart illustrating an example of the content of control processing of the transition operation from the shooting standby state to the retracted storage state in the control unit 21 that comprehensively controls the operation of the digital camera 10 (imaging unit 13). Below, each step of the flowchart of FIG. 17 which is an example of the control process in the control part 21 at the time of the transfer operation | movement from this imaging | photography standby state to a retracted storage state is demonstrated.

  In step S21, when the power button 14 (see FIG. 1 and the like) of the digital camera 10 is turned on (operating state), a step is taken to set the photographing standby state, that is, to shift from the retracted storage state to the photographing standby state. Proceed to S22.

  In step S22, since the power button 14 (see FIG. 1 and the like) is turned on (operating state) in step S21, the imaging unit 13 is set in a shooting standby state so that the shooting optical system 12 can be shot. Control is started and control proceeds to step S23. In step S22, the lens barrel drive unit 23 (see FIG. 2) is driven to control the imaging unit 13 from the retracted storage state (see FIGS. 1 (a) and 12 (b)) to the shooting standby state (FIG. 1 (b) and FIG. 12 (a)). Then, since the movable lens barrel 32 is set to the extended position (photographing standby state), the first cylindrical member 32a and the second cylindrical member 32b move from the fixed cylindrical portion 31a of the fixed frame 31 toward the extended position. It is extended to the subject side (Z-axis direction positive side) in the direction of the photographing optical axis OA. As a result, the second plate-like portion 41b (the second outer peripheral surface 41d) of the operation stage 41 (movable frame portion 42) becomes XY with the elastic member 63 (the inner peripheral surface 63a) of the first tubular member 32a. The state of facing in the direction parallel to the plane is released, and the state shifts to the state of facing the fixed tube portion 31a (the tube portion inner peripheral surface 31b) in the optical axis orthogonal direction (direction parallel to the XY plane). As a result, the movement of the operating stage 41 (movable frame portion 42) with respect to the lens barrel base 33 (its holding opening 33a) in the direction orthogonal to the optical axis is restricted by the second stopper 65, that is, the movable range is the restricted movement region. The state of RA is canceled. For this reason, the operation stage 41 (movable frame portion 42), that is, the image sensor 22 can move within the correction moving area CA in the direction orthogonal to the optical axis with respect to the lens barrel base 33 (its holding opening 33a). Thus, the camera shake correction mechanism 40 can perform camera shake correction.

  In step S23, following the start of the control for setting the imaging unit 13 in the shooting standby state in step S22, the control for electrically holding the operation stage 41 (movable frame portion 42) at the origin position is started. Exit. In step S23, in the state of electrical holding by the camera shake correction mechanism 40, the operation stage 41 (movable frame portion 42) (imaging element 22) is moved to the origin position set on the optical axis, and at the origin position. Initiate control to keep being present. That is, in step S23, the current applied to the vertical drive coil 44 and the horizontal drive coil 46 (see FIG. 11 and the like) is controlled based on the origin position data stored in the storage unit 21a (see FIG. 2). The operation stage 41 (movable frame portion 42) is electrically held at the origin position. In this embodiment, when the imaging unit 13 is set in the shooting standby state in step S22, the optical axis orthogonal to the lens barrel base 33 (the holding opening 33a) of the operating stage 41 (movable frame portion 42) in the course of the operation. The second stopper 65 restricts movement in the direction (direction parallel to the XY plane), that is, the second plate-like portion 41b (the second outer peripheral surface 41d) of the operation stage 41 (movable frame portion 42). Before the state of facing the elastic member 63 (the inner peripheral surface 63a) of the first cylindrical member 32a in the direction orthogonal to the optical axis is released, the operation stage 41 (movable frame portion 42) in step S23 is electrically held. The operation to set the origin position by is executed. This is to prevent the operation stage 41 (movable frame portion 42) from being free to move within the correction movement area CA.

  Due to this transition to the shooting standby state, the digital camera 10 (see FIGS. 1 and 2) is ready for shooting, and the movement of the operation stage 41 (movable frame portion 42) is restricted by the second stopper 65. Transition from a state (a state where the movable range is the restricted movement region RA) to a state where the movement is restricted by the first stopper 64 (a state where the movable range is the correction moving region CA) Then, the state shifts to an electrical holding state by the camera shake correction mechanism 40. At this time, an image acquired under the control of the control unit 21 is displayed on the display unit 18 (see FIG. 2), and a monitoring state is set. Here, when the camera shake correction switch (not shown) is OFF, the camera shake correction by the camera shake correction mechanism 40 is not executed, and when the camera shake correction switch (not shown) is turned ON, the camera shake correction mechanism 40 is immediately activated. The camera shake correction by is executed.

  Next, in the imaging unit 13 (digital camera 10), a vertical position detection sensor 45 and a horizontal position detection sensor 47 (see FIGS. 7 and 9) as the position detection mechanism 24 (see FIG. 2) configured by Hall elements. The output adjustment will be described.

  If the vertical position detection sensor 45 and the horizontal position detection sensor 47 are simply assembled, the output characteristics change for each different imaging unit 13 (digital camera 10). This is due to variations in the sensitivity of the vertical position detection sensor 45 and the horizontal position detection sensor 47 itself, and variations in the positions assembled to the operation stage 41 (movable frame portion 42) in each imaging unit 13 (digital camera 10). And the residual magnetic flux density of magnets (not shown) provided on the lens barrel base 33 that constitutes the position detection mechanism 24 (see FIG. 2) in cooperation with each other. Therefore, in the imaging unit 13 (digital camera 10), output adjustments of the vertical position detection sensor 45 and the horizontal position detection sensor 47 are performed for each solid in order to keep the variation generated for each solid within a predetermined range. .

  The output adjustment is performed as follows. It should be noted that the vertical position detection sensor 45 and the horizontal position detection sensor 47 can perform output adjustment by the same process except that the moving direction and the direction in which the position is detected are different. The output adjustment of the position detection sensor 47 will be described, and the output adjustment of the vertical position detection sensor 45 will be omitted.

  First, in the imaging unit 13 assembled as described above, the movable lens barrel 32 is set to the extended position (shooting standby state) (see FIGS. 1B and 12A). After that, the movement stage 41 (movable frame portion 42) is moved to the end on the positive side in the X-axis direction by the camera shake correction mechanism 40 to the position limited by the first stopper 64 ((a) or (b) in FIG. )), And the output value (output voltage) from the horizontal position detection sensor 47 is acquired, and the X axis is similarly moved to the position where the operation stage 41 (movable frame portion 42) is limited by the first stopper 64 by the camera shake correction mechanism 40. By moving to the end portion on the negative direction side (see (c) or (d) of FIG. 12), the output value (output voltage) from the horizontal position detection sensor 47 is acquired. Then, the difference V between the output values (output voltages) from the horizontal position detection sensor 47 at the both end positions in the X-axis direction is calculated. Here, since the operation stage 41 (movable frame portion 42) moves at both end positions limited by the first stopper 64, the amount of movement is represented by (La1 + La2) using the symbols shown in FIG. be able to. For this reason, the sensitivity S of the horizontal position detection sensor 47 can be expressed by the following equation (4). The sensitivity S refers to the output value (output voltage) of the horizontal position detection sensor 47 per unit length.

S = V / (La1 + La2) (4)
Here, since the moving amount (La1 + La2) is defined at the position limited by the first stopper 64 as described above, the first plate-like part 41a (the first part thereof) of the operating stage 41 (movable frame part 42) is provided. 1 outer peripheral surface 41c) and the size of the holding opening 33a of the lens barrel base 33 (the inner peripheral surface 33c). For this reason, compared with the number of elements that can cause variations in output characteristics that may exist in the horizontal position detection sensor 47 (Hall element) described above, the number of elements that cause variations can be reduced. In addition, the dimensions of the operation stage 41 and the lens barrel base 33 are easier to manage than other factors that may cause variations in output characteristics of the horizontal position detection sensor 47 (Hall element). Accordingly, the dimensional accuracy of the operation stage 41 and the lens barrel base 33 is set high, and the dimensions of the operation stage 41 and the lens barrel are accurately grasped by measuring those dimensions and accurately measuring the center value and variation of the dimensions. The influence of the dimensional variation of the base 33 can be made extremely small.

  Therefore, the difference between the output values (output voltages) of the horizontal position detection sensor 47 obtained by measurement using the above equation (4) by obtaining the movement amount (La1 + La2) using the center value of the above dimensions. From V, the sensitivity S of the horizontal position detection sensor 47 can be calculated. An adjustment coefficient for obtaining a desired output characteristic value based on the output value (output voltage) of the horizontal position detection sensor 47 can be obtained from the ratio between the sensitivity S and the desired sensitivity. From this, it is possible to obtain an adjustment coefficient for individual adjustment in the imaging unit 13 in which the horizontal position detection sensor 47 is mounted. In each imaging unit 13, slight variations in the dimensions of the operation stage 41 and the lens barrel base 33 are obtained. Other variations (individual differences between the respective imaging units 13) except for can be absorbed by the adjustment coefficient. Thereby, the output adjustment of the horizontal position detection sensor 47 (the same applies to the vertical position detection sensor 45) for each imaging unit 13 can be performed with extremely high accuracy.

  Next, in the imaging unit (13) that enables the operation stage (41) to move in the correction moving area (CA) in the direction parallel to the XY plane (direction perpendicular to the optical axis) as in the imaging unit 13. Technical issues will be described. If the second stopper 65 is not provided, the problem of this technique is that the same problem occurs in the image pickup unit 13. Therefore, for the sake of easy understanding, for example, the image pickup unit (13) of the present embodiment. The same reference numerals as those of the image pickup unit 13 are attached to the inner side of the parenthesis symbols.

  In the imaging unit (13), when the electrical holding state is released, the operation stage (41) is freely moved within the correction moving area (CA), and the end of the movable range is operated. There is a possibility that a collision sound or an impact may be caused by contact with the stage (41). In the conventional imaging unit (13) for preventing this, the needle-like portion of the locking member that is movable in the Z-axis direction by the female screw member that is moved in the Z-axis direction to displace the fifth lens group in the photographing optical axis direction Is provided with a lock mechanism for mechanically fixing and holding the operating stage (41) by inserting it through a through hole provided in the operating stage (41). , There is a risk of generating a pressing force on the photographing optical system and the image sensor. Further, since the locking mechanism is for fitting the needle-like portion of the locking member provided in association with the fifth lens group into the through hole of the movable member, the optical member holding frame for holding the fifth lens group The retracted position of the (movable lens barrel (32)) is limited by the position of the actuating stage (41) in the photographic optical axis direction, and the size of the digital camera (10) in the photographic optical axis direction is reduced. It will be an obstacle.

  Therefore, in the imaging unit (13), any of the first stopper (64) that defines the correction moving area (CA), that is, the operation stage (41) and the lens barrel base (33) (its holding opening (33a)). By providing an elastic member on either side, it is conceivable to reduce collision noise and impact due to contact between the operating stage (41) and the lens barrel base (33). If it is this structure, a collision sound can be reduced without applying a load to an action | operation stage (41), and the fall of quality can be prevented.

  However, when the elastic member is provided in this way, even if the output adjustment of the vertical position detection sensor (45) and the horizontal position detection sensor (47) is performed as described above, high accuracy cannot be obtained. In the above-described method, it is necessary to grasp the position where movement is restricted by the first stopper (64) with high accuracy. However, the operation stage (41) and the lens barrel base (33) are elastic members. When it is applied through the elastic member, the elastic deformation amount of the elastic member is changed by the applied force, so that it is difficult to manage the elastic deformation amount, and it is difficult to manage the thickness dimension of the elastic member. Therefore, the position where movement is restricted by the first stopper (64) cannot be grasped with high accuracy. For this reason, variations in the amount of elastic deformation of the elastic member and variations in the thickness dimension of the elastic member are included in the adjustment coefficient, resulting in a decrease in adjustment accuracy.

  On the other hand, in the imaging unit 13 of the embodiment according to the present invention (digital camera 10 equipped with the imaging unit 13), the correction moving area CA for correcting camera shake is limited by the first stopper 64, that is, the operation stage 41 (movable) Since the first outer peripheral surface 41c of the first plate-like portion 41a of the frame portion 42) is defined at a position where it contacts the inner peripheral surface 33c of the holding opening 33a of the lens barrel base 33, the vertical position detection sensor is obtained by the method described above. By adjusting the output of 45 and the horizontal position detection sensor 47, the output can be adjusted with extremely high accuracy.

  Further, in the imaging unit 13 (digital camera 10), when the movable lens barrel 32 is in the retracted position (collapsed retracted state), the operation stage 41 can move in the direction perpendicular to the optical axis (direction parallel to the XY plane). Since the range can be a limited movement area RA smaller than the correction movement area CA, even if the operation stage 41 moves unintentionally, the impact can be suppressed. For this reason, while being able to reduce the load to the action | operation stage 41, the collision sound and impact accompanying the movement of the action | operation stage 41 can be reduced.

  Further, in the image pickup unit 13 (digital camera 10), the range in which the lens unit 33 (its holding opening 33a) can move in the direction perpendicular to the optical axis is a limited movement area RA smaller than the correction movement area CA. Therefore, unlike the conventional configuration in which the needle-like portion is fitted into the through-hole, the movable lens barrel 32 is set in the retracted position. The range in which one (in the above-described embodiment, the first cylindrical member 32a) can move without being brought into contact with the operation stage 41 can be set as the restricted movement area RA, so that the transition is made between the imaging standby state and the retracted storage state. In this case, it is possible to prevent the pushing force in the direction of the photographing optical axis OA or the pushing force in the direction orthogonal to the optical axis from acting on the operation stage 41 and the photographing optical system 12 (each optical member). .

  In the imaging unit 13 (digital camera 10), the restriction movement area RA is defined by restriction by the second stopper 65 different from the first stopper 64 that defines the correction movement area CA. The movement area RA can be set to a range smaller than the correction movement area CA.

  In the imaging unit 13 (digital camera 10), the first plate-like portion 41a (the first outer peripheral surface 41c) of the operation stage 41 and the holding opening 33a (the inner peripheral surface 33c thereof) of the barrel base 33 are orthogonal to the optical axis. The first stopper 64 is formed by contact in the direction, and one of the second plate-like portion 41b (the second outer peripheral surface 41d) of the operation stage 41 and the movable lens barrel 32 (in the above-described embodiment, the first tubular member). 32a (the rear end portion 32c) is set so as to hit the first stopper 64 in the direction perpendicular to the optical axis (the second intervals Lb1 and Lb2 are set smaller than the first intervals La1 and La2). Since the two stoppers 65 are configured, the limited movement area RA can be set to a range smaller than the correction movement area CA with a simple configuration.

  In the imaging unit 13 (digital camera 10), the direction of the photographing optical axis OA with respect to the fixed cylinder portion 31a (fixed frame 31) as a fixed member in accordance with the transition between the photographing standby state and the retracted retracted state of the optical member housing member. Since the second stopper 65 is constituted by the cooperation of one of the movable lens barrels 32 (first cylindrical member 32a) as the movable optical member housing member that moves to the movable stage 41 and the operation stage 41, the configuration is simple. The range in which the operating stage 41 can move with respect to the lens barrel base 33 (holding opening 33a) is switched between the correction movement area CA and the limit movement area RA in accordance with the mode of transition between the photographing standby state and the retracted storage state. be able to.

  In the imaging unit 13 (digital camera 10), the movable lens barrel 32 (first cylindrical member 32a (rear end portion 32c)) in the retracted position is used as the second plate-like portion 41b (second outer periphery thereof) of the operation stage 41. By limiting the surface 41d) in the direction orthogonal to the optical axis, the range in which the lens base 33 (its holding opening 33a) can move in the direction orthogonal to the optical axis is limited to a smaller limit than the correction moving area CA. Since the region RA is used, it is possible to suppress an impact when the operation stage 41 moves unintentionally without consuming electric power.

  The imaging unit 13 (digital camera 10) moves in the direction perpendicular to the optical axis with respect to the lens barrel base 33 (the holding opening 33a) of the operation stage 41 by shifting between the imaging standby state and the retracted storage state. Range can be switched between the correction moving area CA and the limited moving area RA, and it is not necessary to provide a new drive mechanism only for the switching, so that a simple configuration can be achieved and the cost can be reduced. An increase can be prevented. This can contribute to miniaturization of the entire digital camera 10 and can contribute to a reduction in manufacturing cost of the digital camera 10.

  In the imaging unit 13 (digital camera 10), since the second stopper 65 that defines the restricted movement area RA hits through the elastic member 63, the impact when the operation stage 41 moves unintentionally is elastic. Since it can absorb with the member 63, the said impact can be suppressed more effectively.

  In the imaging unit 13 (digital camera 10), the correction stopper movement area CA is defined by the first stopper 64 and the restriction movement area RA is defined by the second stopper 65. Even if the elastic member 63 is provided between the second plate-like portion 41b (the second outer peripheral surface 41d) of the stage 41 and the movable lens barrel 32 (the first cylindrical member 32a (the rear end portion 32c)), the elasticity By providing the member 63, it is possible to prevent the output adjustment accuracy of the vertical position detection sensor 45 and the horizontal position detection sensor 47 from being affected by the method described above.

  In the imaging unit 13 (digital camera 10), the first cylindrical shape of the movable lens barrel 32 as a movable optical member housing member that moves in the direction of the photographing optical axis OA with respect to the fixed cylinder portion 31a (fixed frame 31) as the fixed member. Since the elastic member 63 is provided on the member 32a, the weight of the operating stage 41 that moves in the direction orthogonal to the optical axis with respect to the lens barrel base 33 (its holding opening 33a) for correcting camera shake is the elastic member. By providing 63, the increase can be prevented. For this reason, it is possible to perform camera shake correction more appropriately while more effectively suppressing an impact when the operation stage 41 moves unintentionally.

  In the imaging unit 13 (digital camera 10), since the elastic member 63 is molded integrally with the first cylindrical member 32a and provided at the rear end portion 32c, the assembling work can be facilitated. Since the repair process due to the poor attachment of the elastic member 63 to the first tubular member 32a can be greatly reduced, the time required for manufacturing can be shortened and the manufacturing cost can be reduced.

  In the imaging unit 13 (digital camera 10), since the elastic member 63 is attached over the entire circumference of the inner peripheral wall surface of the rear end portion 32c of the first cylindrical member 32a, the imaging light is applied to the fixed cylinder portion 31a. In the case of a movable optical member housing member that moves in the direction of the axis OA, a rotating cylinder that moves in the direction of the photographing optical axis OA while rotating about the photographing optical axis OA, and in the direction of the photographing optical axis OA without rotation. The same effect can be obtained with either the moving liner or the optical member holding frame that holds each optical member of the photographing optical system 12. For this reason, since any of the movable optical member housing members can be selected as the second stopper portion on the housing member side (fixed side), the change from the conventional configuration is extremely small and simple. It can be realized with a configuration.

  In the imaging unit 13 (digital camera 10), the operation stage 41 is formed into a plate shape that protrudes to the positive side in the Z-axis direction from the first plate portion 41a that forms a plate shape and forms the outer shape of the operation stage 41. A second plate-like portion 41b exhibiting the same, and the second plate-like portion 41b in a state where the operation stage 41 is held movably in the direction perpendicular to the optical axis with respect to the barrel base 33. The movable lens barrel 32 (movable) moves in the direction of the photographing optical axis OA inward of the fixed tube portion 31a of the fixed frame portion 31a formed integrally with the base 33. The second stopper 65 is configured by the rear end portion 32c (elastic member 63) of one first cylindrical member 32a of the optical member housing member) and the second outer peripheral surface 41d of the second plate-like portion 41b. From the movable mirror with a simple configuration The movement of the 32 collapsed position and the extended position, it is possible to switch the movable range of the actuation stage 41 for the lens barrel base 33 (holding opening 33a) between the correction movement area CA and limits the movement area RA.

  In the imaging unit 13 (digital camera 10), the fixed frame 31 formed integrally with the lens barrel base 33 in a state where the operation stage 41 is held movably in the direction orthogonal to the optical axis with respect to the lens barrel base 33. The second plate-like portion 41b is present inside the fixed cylinder portion 31a, and the second outer peripheral surface 41d of the elastic member 63 of the rear end portion 32c of the first cylindrical member 32a of the movable lens barrel 32 (inside thereof) Unlike the conventional configuration in which the needle-like portion is fitted into the through-hole, the movable mirror is arranged in the direction of the photographic optical axis OA because the restricted moving region RA is defined by being applied in the direction orthogonal to the optical surface 63a). Since there is no need to bring the cylinder 32 (first cylindrical member 32a) into contact with the operating stage 41, the retracted position of the movable lens barrel 32 (first cylindrical member 32a) is positioned in the direction of the photographing optical axis OA of the operating stage 41. Reduce restrictions by Bets can be, can be prevented from becoming an obstacle to reducing the size dimension in due to the photographing optical axis OA in defining the limits movement area RA.

  In the imaging unit 13 (digital camera 10), the elasticity of the rear end portion 32c of the first cylindrical member 32a of the movable lens barrel 32 (movable optical member housing member) of the second plate-like portion 41b (second outer peripheral surface 41d) thereof. The second interval (Lb1 and Lb2) in the direction orthogonal to the optical axis with respect to the member 63 (its inner peripheral surface 63a) is the holding opening 33a (on the lens barrel base 33 of the first plate-like portion 41a (its first outer peripheral surface 41c)). The size of the first plate-like portion 41a and the second plate-like portion 41b in the operating stage 41 is smaller than the first interval (La1 and La2) in the direction perpendicular to the optical axis with respect to the inner circumferential surface 33c). Since the dimensions only need to be set, the lens barrel base 33 (can be realized with a simple configuration, with very little change from the conventional configuration of the fixed barrel portion 31a (fixed frame 31) and the movable barrel 32. Holding open It is possible to switch the movable range of the actuation stage 41 for 33a) with a correction for the moving area CA and limits the movement area RA.

  In the imaging unit 13 (digital camera 10), the first of the movable lens barrel 32 moved in the direction of the photographic optical axis OA with respect to the fixed barrel portion 31a (fixed frame 31) with the transition between the shooting standby state and the retracted storage state. When the one cylindrical member 32a is in the retracted position, the elastic member 63 (the inner peripheral surface 63a) of the first cylindrical member 32a is connected to the second plate-like portion 41b (the second outer peripheral surface 41d) of the operating stage 41 and the optical axis. When the first cylindrical member 32a is in the extended position, the elastic member 63 (the inner peripheral surface 63a) and the second plate-like portion 41b (the second outer peripheral surface 41d) are made to face each other in the orthogonal direction to be the restricted movement region RA. ) In the direction orthogonal to the optical axis is canceled to form the correction moving area CA. Therefore, when the first cylindrical member 32a is in the extended position, that is, in the photographing standby state, the camera shake correction is appropriately performed immediately. To do Kill.

  In the imaging unit 13 (digital camera 10), when an operation for stopping the power button 14 (stop operation) is performed, a movable range of the operation stage 41 relative to the lens barrel base 33 (holding opening 33a) is corrected. Even if the application of current to the vertical drive coil 44 and the horizontal drive coil 46 is stopped as the entire operation is stopped, the operation stage 41 is not switched from the movement area CA to the restricted movement area RA. Impact when moving unintentionally can be suppressed.

  In the imaging unit 13 (digital camera 10), when the movable range of the operation stage 41 with respect to the lens barrel base 33 (holding opening 33a) is switched from the correction movement area CA to the restriction movement area RA, the operation stage 41 is first set to the origin. Since the electric holding control is performed at the position, the movable lens barrel 32 (first cylindrical member 32a) is moved when the first cylindrical member 32a of the movable lens barrel 32 is moved from the extended position to the retracted position. And the operation stage 41 can be surely prevented.

  In the imaging unit 13 (digital camera 10), the second stopper 65 is configured by the first cylindrical member 32a of the movable lens barrel 32 and the second plate-like portion 41b of the operation stage 41, which can easily ensure high rigidity. Therefore, the movable range of the operation stage 41 can be more reliably set as the limited movement area RA with a simple configuration, and the imaging optical axis can be connected to the imaging element 22 and the imaging optical system 12 (each optical member thereof). It can suppress that the force pushed to OA direction and the force pushed to an optical axis orthogonal direction act.

  In the digital camera 10 (electronic device) on which the imaging unit 13 is mounted, the above-described effects can be obtained, so that the use can be continued for a longer time and a more appropriate image can be acquired. it can.

  In the digital camera 10 (electronic device) on which the imaging unit 13 is mounted, when the first cylindrical member 32a of the movable lens barrel 32 is in the retracted position, the second movement is performed in the limited movement area RA smaller than the correction movement area CA. The second plate-like portion 41b (the second outer peripheral surface 41d) of the operation stage 41 (movable frame portion 42) as the stopper 65 and the movable barrel 32 (the first cylindrical member 32a (the rear end portion 32c)) are elastic. Since the contact is made through the member 63, the second plate-like portion 41b (the second outer periphery thereof) is provided even when an unexpected impact occurs in the digital camera 10 in which the power button 14 is turned off (non-operating state). Since the collision sound between the surface 41d) and the first cylindrical member 32a (rear end portion 32c) can be made extremely small, the quality of the digital camera 10 is deteriorated by the collision sound. It is possible to stop.

  Therefore, in the imaging unit 13 according to the present invention, the generation of the collision sound and the impact accompanying the unexpected movement of the operation stage 41 (movable frame portion 42) as the movable member is suppressed to the imaging optical system 12 and the imaging element 22. Generation of pressing force can be prevented.

  In the above-described embodiments, the imaging unit 13 as an example of the imaging unit according to the present invention has been described. However, the imaging unit is an imaging unit that acquires an object image formed by the imaging optical system using an imaging device, and the imaging optical Retracting at least a part of a plurality of optical members of the system to house each optical member, and moving the at least a part of each optical member to the subject side to move to a subject standby state; A plurality of optical member housing members for holding each of the above, a fixing member that is provided in the housing with a position relative to the photographing optical axis fixed when viewed in a direction orthogonal to the optical axis perpendicular to the photographing optical axis, and the imaging element, A movable member supported by the fixed member so as to be movable in parallel with a plane orthogonal to the photographing optical axis with respect to the fixed member. When one of the movable optical member housing members that are moved in the photographing optical axis direction in accordance with the transition between the retracted housing state and the photographing standby state is set to the extension position on the subject side, the fixed member and the optical axis orthogonal direction When the first stopper portion and the movable optical member housing member facing each other at a first interval are set to the retracted position on the image plane side, the first spacing is perpendicular to the movable optical member housing member and the optical axis. Any imaging unit may be used as long as the imaging unit is provided with a second stopper portion that is opposed to each other with a smaller second interval, and is not limited to the above-described embodiment.

  In the above-described embodiment, the rear end portion 32c of the first cylindrical member 32a of the movable lens barrel 32 as the movable optical member housing member, that is, the second stopper portion on the housing member side (fixed side) of the second stopper 65 is used. The elastic member 63 is provided. However, as long as the second stopper 65 is applied in the direction perpendicular to the optical axis via the elastic member 63, the elastic member 63 may be provided on the movable second stopper portion, and provided on both. However, the present invention is not limited to the above-described embodiments. An imaging unit 13 ′ as an example of a configuration provided in the movable second stopper portion is shown in FIG. The imaging unit 13 ′ is replaced with the first cylindrical member 32a except that the elastic member 63 is attached around the second plate-like portion 41b (the second outer peripheral surface 41d) of the operation stage 41. The configuration is the same as that of the imaging unit 13. In the example of FIG. 18, the imaging unit 13 ′ is molded integrally with the operation stage 41 using a mold and is provided on the second plate-like portion 41 b (second outer peripheral surface 41 d). The elastic member 63 may be bonded or welded as long as it is attached to the second plate-like portion 41b (second outer peripheral surface 41d). In this imaging unit 13 ′, since the elastic member 63 is provided on the operation stage 41 (the second plate-like portion 41 b), the size is reduced as compared with the case where the elastic member 63 is provided on the movable optical member housing member. Can be made easy. In the imaging unit 13 ′, the elastic member 63 is provided around the second plate-like portion 41 b (the second outer peripheral surface 41 d) of the operation stage 41, but the operation stage 41 is Z with respect to the lens barrel base 33. Since the rotation about the axial direction is prevented, the rear end portion 32c of the first cylindrical member 32a of the movable barrel 32, that is, the second plate-like portion 41b (second stopper portion on the movable side), that is, The second stopper 65 may be provided only at a location where it can come into contact with the second stopper portion on the housing member side (fixed side). In this example, it can be provided only at the four corners of the second plate-like portion 41b that has a rectangular shape when viewed in the Z-axis direction. With such a configuration, further downsizing can be facilitated.

  Further, in the above-described embodiment, the second stopper 65 is configured by the first cylindrical member 32a fitted inside the fixed cylinder portion 31a in the movable barrel 32. However, the retracted storage state and the photographing standby state As long as it is one of the movable optical member housing members that are moved in the direction of the photographic optical axis OA in accordance with the transition, the invention is not limited to the above-described embodiment.

  In the above-described embodiment, the elastic member 63 is attached over the entire circumference of the inner peripheral wall surface of the rear end portion 32c of the first cylindrical member 32a, but the rear end of the first cylindrical member 32a of the movable lens barrel 32 is used. The location 32c, that is, the second stopper 65 on the housing member side (fixed side) of the second stopper 65 is provided only at a location where the second plate-like portion 41b (movable side second stopper portion) of the operation stage 41 can come into contact. It may be present and is not limited to the above-described embodiments. In the case of such a configuration, the second stopper portion on the housing member side (fixed side) of the second stopper 65 is movable so as to move in the direction of the photographing optical axis OA in accordance with the transition between the retracted storage state and the photographing standby state. Of the optical member housing members, an optical member that holds each optical member of the photographic optical system 12 that moves in the direction of the photographic optical axis OA without rotating, or a liner that moves in the direction of the photographic optical axis OA without rotating. Must be one of the holding frames.

  In the embodiment described above, in the operation stage 41 (movable frame portion 42) as the movable member, the first stopper 64 (movable side) is formed by the first plate-like portion 41a that forms a plate shape as a whole and forms the outer shape of the operation stage 41. The second stopper 65 (the second stopper portion on the movable side) is formed by a second plate-like portion 41b that protrudes from the first plate-like portion 41a to the positive side in the Z-axis direction and exhibits a plate shape. However, when one of the movable optical member housing members (movable lens barrel 32) (the first cylindrical member 32a in the embodiment) is set to the extension position on the subject side, the fixed member (lens barrel base) is formed. 33) and the first stopper portion and the movable optical member housing member (first cylindrical member 32a) facing each other at a first interval (La1, La2) in the direction orthogonal to the optical axis are the retracted positions on the image plane side. And first in the direction perpendicular to the optical axis with the movable optical member housing A second stopper portion which is opposed at a small second gap (Lb1, Lb2) than septum, as long as it has a not intended to be limited to the embodiments described above.

  In the above-described embodiment, the operation stage 41 provided with the image sensor 22 by the camera shake correction mechanism 40 has a predetermined range (correction) in a direction parallel to the XY plane perpendicular to the photographing optical axis OA with respect to the lens barrel base 33. The movable member provided with the imaging element (imaging element 22) is fixed to the imaging optical axis with respect to the fixed member that is held movably in the movement area CA). What is necessary is just to be hold | maintained so that a movement in the direction parallel to XY plane orthogonal to OA is possible, It is not limited to an above-described Example.

  In the above-described embodiment, the correction moving area CA has a rectangular shape as a whole, and the restricted moving area RA has a rectangular shape. However, the restricted moving area RA is fixed to the fixed member (lens barrel base 33). As long as the movable member (actuation stage 41) is provided within the correction moving area CA, which is a range in which the movable member 41 is movable, it is not limited to the above-described embodiment.

  In the above-described embodiment, the second plate portion 41b constituting the second stopper 65 (the second stopper portion on the movable side) has a rectangular shape when viewed in the Z-axis direction, but from the photographing optical axis OA. The first distance (La1) in the direction perpendicular to the optical axis with respect to the fixed member (lens barrel base 33) of the first stopper 64 (first stopper portion on the movable side) of the movable member (operation stage 41) with respect to any radial direction. , La2), the optical axis of the movable optical member housing member (first cylindrical member 32a) that is the retracted position of the second stopper 65 (second stopper portion on the movable side) of the movable member (operation stage 41). What makes the 2nd space | interval (Lb1, Lb2) in an orthogonal direction small, ie, the structure which reaches | attains the position restrict | limited by the 2nd stopper 65, before reaching the position restrict | limited by the 1st stopper 64. Z-axis direction In shape seen well be a polygonal shape be circular, but is not limited to the aforementioned embodiments.

  In the above-described embodiment, the imaging unit 13 provided and configured in the digital camera 10 is shown. However, the subject image formed by the imaging optical system is acquired by the imaging element, and the imaging element is moved by the movable member. As long as it is movable in the direction perpendicular to the optical axis with respect to the fixed member, the imaging unit is an imaging unit in which the imaging optical system and the imaging element are housed in a housing and the housing is detachable from the imaging device body. It may be an imaging unit provided in a housing (imaging device main body) of an imaging device (digital camera) in which each cylindrical part holding the imaging optical system is detachable. It is not limited to.

  In the above-described embodiment, the imaging unit 13 is mounted on the digital camera 10. However, the subject image formed by the imaging optical system is acquired by the imaging element, and the imaging element is fixed to the fixed member by the movable member. The present invention relates to an electronic device as a portable information terminal device such as a PDA (personal data assistant) incorporating a camera function or a mobile phone as long as the electronic device is movable in the direction orthogonal to the optical axis. The configuration of the imaging unit can be applied, and is not limited to the above-described embodiment. This is because many of such portable information terminal devices include functions and configurations that are substantially the same as those of the digital camera 10 although the appearance is slightly different. Similarly, the configuration of the imaging unit according to the present invention may be employed in an electronic apparatus as an image input device.

  As described above, the photographing apparatus of the present invention has been described based on the embodiments. However, the specific configuration is not limited to the embodiments, and design changes and additions are allowed without departing from the gist of the present invention. The

DESCRIPTION OF SYMBOLS 10 Digital camera (as an example of an electronic device) 11 Housing 12 Imaging optical system 13, 13 'Imaging unit 22 Imaging element 31 Fixed frame 31a (as an example of a fixing member) Fixed cylinder portion 32 (of a movable optical member housing member) Movable lens barrel 32a (as an example) First cylindrical member 32b (as an example of a movable optical member housing member) Second tubular member 33 (as an example of a movable optical member housing member) Lens barrel base 41 Actuating stage 41a (as an example of a movable member) 41a First plate portion 41b Second plate portion 41c First outer peripheral surface 41d (as an example of a first stopper portion) As an example of a second stopper portion Of the second outer peripheral surface 42 (as an example of the movable member) movable frame portion 63 elastic member 64 first stopper 65 second stopper La1, La2 first interval Lb1, L 2 second interval OA photographing optical axis CA correcting movement region RA limit movement area

JP 2010-008658 A

Claims (10)

An imaging unit that acquires an image of a subject formed by an imaging optical system using an imaging device,
Retracting at least a part of the plurality of optical members of the photographing optical system and moving the at least a part of each optical member from the retracted storage state storing the respective optical members to the subject side,
A plurality of optical member housing members each holding the optical members;
A fixing member that is provided in the housing with a position relative to the photographing optical axis fixed in a direction orthogonal to the optical axis perpendicular to the photographing optical axis;
A movable member that is provided with the imaging element and is supported by the fixed member so as to be movable in parallel with a surface perpendicular to the photographing optical axis with respect to the fixed member;
In the movable member, one of the movable optical member accommodating members that are moved in the direction of the photographing optical axis in accordance with the transition between the retracted retracted state and the photographing standby state among the optical member accommodating members is an extension position on the subject side. Then, when the movable member holding member is set to the retracted position on the image plane side, the movable optical member is moved to the first stopper portion facing the fixed member at a first interval in the direction orthogonal to the optical axis. An imaging unit, comprising: a housing member; and a second stopper portion that faces the second member in a direction orthogonal to the optical axis at a second interval smaller than the first interval.   The imaging unit according to claim 1, wherein the second stopper portion and the movable optical member housing member are in contact with each other via an elastic member provided on at least one side.   The imaging unit according to claim 2, wherein the elastic member is provided in the movable optical member housing member.   The imaging unit according to claim 3, wherein the movable optical member housing member and the elastic member are integrally molded.   The imaging unit according to claim 2, wherein the elastic member is provided on the movable member.   The imaging unit according to claim 5, wherein the movable member and the elastic member are integrally molded. The movable member includes a first plate-like portion that is movable in the direction perpendicular to the optical axis inside the fixed member, and an inner portion of the first plate-like portion as seen in the photographing optical axis direction. A second plate-like portion formed continuously with the first plate-like portion and provided with the imaging device,
The first stopper portion is formed by a first outer peripheral surface existing in the direction perpendicular to the optical axis in the first plate-shaped portion,
The said 2nd stopper part is formed in the 2nd outer peripheral surface which exists in the said optical axis orthogonal direction in a said 2nd plate-shaped part, The any one of Claims 1-6 characterized by the above-mentioned. Imaging unit.   The second plate-like portion is provided so as to project from the first plate-like portion toward the subject side, and holds the movable optical member accommodation member among the optical member accommodation members so as to be movable in the photographic optical axis direction. The imaging unit according to claim 7, wherein the imaging unit is present inside a fixed cylinder portion provided on the fixing member. An imaging unit that acquires an image of a subject formed by an imaging optical system using an imaging device,
Retracting at least a part of the plurality of optical members of the photographing optical system and moving the at least a part of each optical member from the retracted storage state storing the respective optical members to the subject side,
A plurality of optical member housing members each holding the optical members;
A fixing member that is provided in the housing with a position relative to the photographing optical axis fixed in a direction orthogonal to the optical axis perpendicular to the photographing optical axis;
A movable member that is provided with the imaging element and is supported by the fixed member so as to be movable within a correction moving region set in parallel to a surface orthogonal to the photographing optical axis with respect to the fixed member;
Among the optical member housing members, between the movable member and one of the movable optical member housing members that are moved in the photographing optical axis direction in accordance with the transition between the retracted housing state and the photographing standby state, the movable optical member is provided. When the member receiving member is set to the retracted position on the image plane side, the optical axis orthogonal direction is set to set a limited movement area as a movable range of the movable member with respect to the fixed member inside the correction movement area. When the movable optical member housing member is set to the extension position on the subject side, the limitation that the movable range of the movable member relative to the fixed member is not hit in the optical axis orthogonal direction to be the correction moving region. An image pickup unit provided with a stopper. An electronic apparatus comprising the imaging unit according to any one of claims 1 to 9.