JP2012159774A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device equipped with a handshake correction function mechanism capable of preventing the generation of pressing force to a photographic optical system and an image pickup device while suppressing power consumption.SOLUTION: An imaging device (10) is provided with a mounting stage 35 movable along a plane perpendicular to a photographic optical axis and can shift between a storage state and a photography stand-by state. The imaging device (10) includes a plurality of optical member housing frames for housing respective optical members, and housing frame driving means (23) for driving the respective optical member housing frames. The mounting stage 35 is provided with a first repulsive force generating part (41). One of the optical member housing frames (33) that is moved in the photographic optical axis direction by the shift between the storage state and the photography stand-by state is provided with a second repulsive force generating part (42) for generating repulsive force between it and the first repulsive force generating part (41). The first and second repulsive force generating parts have a positional relation where they face each other in the storage state so as to act the repulsive force in a direction orthogonal to the photographic optical axis and they are away from each other in the photography stand-by state.

Description

  The present invention relates to an imaging apparatus such as a digital still camera or a digital video camera (hereinafter referred to as “digital camera”) having a camera shake correction function for correcting camera shake during shooting.

  In the imaging apparatus, there is a digital camera that causes a subject image to be received by an imaging element (CCD or the like) through a photographing lens system (imaging optical system) and generates a digital image corresponding to the subject image based on an image signal from the imaging element. As such a digital camera, in recent years, a digital camera with a camera shake correction function having a camera shake correction function for correcting camera shake during shooting has been put into practical use.

  As such a camera shake correction unit, for example, an image sensor (CCD or the like) is placed in a plane perpendicular to the shooting optical axis direction (Z axis) of the shooting optical system (X−) according to the amount of blur of the subject image caused by the camera shake. Some have adopted a structure that moves in the Y plane. In such a conventional digital camera having a camera shake correction function, for example, the imaging element is mounted on a mounting stage provided at one end of a fixed cylinder that houses a lens barrel on the imaging optical axis. This mounting stage is provided so as to be movable in an XY plane perpendicular to the photographic optical axis as the Z-axis direction. The mounting stage is moved by, for example, a magnetic force formed by a permanent magnet and a coil facing the permanent magnet. In this conventional digital camera, for example, a camera shake detection sensor is used to detect the tilt between the Y-axis direction and the X-axis direction, and the energization current to the coil is changed based on this detection output. The camera shake is corrected by controlling the image sensor to move following the movement of the image.

  In this conventional digital camera, when camera shake correction is not performed, it is desirable to stop applying current to the coil from the viewpoint of reducing power consumption. However, since the mounting stage is movably provided at one end of the fixed cylinder, when the position control of the mounting stage using the magnetic force between the permanent magnet and the coil (hereinafter referred to as electrical holding) is stopped, There is a possibility that a collision noise or an impact may occur due to the movement within the movable range and contact with the end of the movable range.

  Therefore, some cameras with a camera shake correction function are provided with a lock mechanism that mechanically fixes and holds the mounting stage (imaging device) (for example, see Patent Document 1). In this structure, in order to displace the fifth lens group in the photographing optical axis direction, a locking member that can be moved in the Z-axis direction is provided by a female screw member that is moved in the Z-axis direction, and a needle provided on the locking member Since the mounting stage can be prevented from moving even in a state where the electrical holding is released, by inserting the shape portion through a through hole provided in the mounting stage, power consumption can be suppressed. It is possible to prevent the occurrence of collision noise and impact caused by unexpected movement of the mounting stage.

  However, in the above-described conventional camera with camera shake correction function, the movement of the mounting stage in the XY direction is restricted by the engagement between the needle-like portion of the locking member and the through hole of the mounting stage. Therefore, it is necessary to make the gap between the needle-like part and the through hole viewed in the XY direction as small as possible. For this reason, unless the center positions of the needle-like part and the through-hole viewed in the XY plane are matched with extremely high accuracy, the peripheral surface of the needle-like part is transferred when the placement stage moves to the movement restricted state. And the inner peripheral wall surface of the through hole interfere with each other, and the fifth lens group holding frame pivotally supported together with the locking member via the locking member provided with the needle-like portion is pushed in the XY direction. There is a possibility that pressure is applied or a pressing force in the Z-axis direction is applied to the mounting stage. The pressing force in the XY direction on the fifth lens group holding frame acts so as to shift the position of the fifth lens group held there in the direction orthogonal to the photographing optical axis. Since the pressing force in the Z-axis direction acts so as to shift the position of the image sensor held there in the photographing optical axis direction, it is desirable to eliminate the possibility of such pressing force being generated.

  The present invention has been made in view of the above circumstances, and an imaging apparatus equipped with a camera shake correction function mechanism capable of preventing generation of pressing force on an imaging optical system and an imaging element while suppressing power consumption. The purpose is to provide.

  The imaging apparatus according to claim 1, further comprising: a mounting stage that is movable along a plane in order to move an imaging element that acquires a subject image by a photographing optical system in a plane perpendicular to the photographing optical axis. A storage state in which at least a part of the plurality of optical members of the optical system is retracted and the optical members are stored, and a shooting standby state in which at least a part of the optical members are moved from the storage state to the subject side. An imaging apparatus capable of transition, comprising: a plurality of optical member housing frames that house each optical member; and a housing frame driving means that drives each optical member housing frame. A first repulsive force generator is provided, and one of the optical member storage frames that is moved in the direction of the photographic optical axis in accordance with the transition between the storage state and the photographing standby state is in contact with the first repulsive force generator. Without the first repulsive force generating part A second repulsive force generating portion for generating a force, and the first repulsive force generating portion and the second repulsive force generating portion are photographed when the respective optical member housing frames are moved by the housing frame driving means to enter a housed state. The optical frames are opposed to each other in a direction orthogonal to the optical axis, and are separated from each other when the respective optical member housing frames are moved by the housing frame driving means to enter a photographing standby state. Features.

  An imaging apparatus according to a second aspect is the imaging apparatus according to the first aspect, wherein the first repulsive force generation unit and the second repulsive force generation unit are arranged so that equal magnetic poles face each other. It is formed of a magnetic material.

  An imaging apparatus according to a third aspect is the imaging apparatus according to the first or second aspect, wherein, in the mounting stage, the imaging optical axes are set as intersections in a plane orthogonal to the imaging optical axis. The first repulsive force generator is provided in each of two orthogonal directions.

  An imaging apparatus according to a fourth aspect is the imaging apparatus according to the first or second aspect, wherein, in the mounting stage, the imaging stage is centered on the imaging optical axis in a plane orthogonal to the imaging optical axis. At least three first repulsive force generating portions are provided so as to surround the mounting stage.

  The imaging device according to claim 5 is the imaging device according to claim 1 or 2, wherein the first repulsive force generator has a cylindrical shape having an axis along the photographing optical axis direction. It is a magnetized material in which adjacent portions are different magnetic poles when viewed in the circumferential direction as the center, and the second repulsive force generator is long enough to be inserted into the inner space of the first repulsive force generator It is a magnetized material.

  An electronic apparatus according to a sixth aspect includes the imaging device according to any one of the first to fifth aspects.

  In the imaging apparatus according to the present invention, when the photographic optical system is in the storage position, the second repulsive force generation unit provided in the optical member storage frame is perpendicular to the first repulsive force generation unit of the mounting stage and the photographic optical axis. Since the repulsive force (repulsive force) acting between the first repulsive force generating portion and the second repulsive force generating portion, for example, at the end of the movable range of the mounting stage. The placement stage can be mechanically held by pressing or by restricting the movement of the placement stage using mutual repulsive force (repulsive force). Therefore, the optical member housing frame and the mounting stage are not brought into contact with each other, and a new member only for mechanical holding is placed between the optical member housing frame and the mounting stage without being brought into contact with each other. The placement stage can be mechanically regulated. In this way, since the mounting stage can be mechanically held without contact, the pressing force in the XY direction generated in the optical member housing frame can be made extremely small, and the mounting stage It is possible to reliably prevent a pressing force in the direction of the photographing optical axis.

  Further, in the photographing optical system, the movement to the photographing optical axis direction in accordance with the transition between the settling position and the photographing stand-by position makes it close to or away from the placement stage. Since the second repulsive force generating portion is provided in the optical member housing frame, it is not necessary to use a new drive mechanism only for mechanical holding, and thus an increase in power consumption can be prevented.

  In addition to the above-described configuration, if the first repulsive force generating portion and the second repulsive force generating portion are formed of a magnetized material arranged so that the same magnetic poles face each other, Mechanical holding of the mounting stage in a non-contact manner can be realized.

  In addition to the above-described configuration, in the mounting stage described above, the first repulsive force generator is provided in each of two directions orthogonal to each other with the imaging optical axis as an intersection in a plane orthogonal to the imaging optical axis. As a result, it is possible to more stably mechanically hold the mounting stage that is movable along a plane orthogonal to the photographing optical axis.

  In addition to the above-described configuration, at least three of the first repulsive force generators are provided in the mounting stage so as to surround the mounting stage around the imaging optical axis in a plane orthogonal to the imaging optical axis. As a result, the mounting stage can be mechanically held at a position where the repulsive forces (repulsive forces) generated by the three pairs of the first repulsive force generator and the second repulsive force generator are balanced.

  In addition to the above-described configuration, the first repulsive force generator has a cylindrical shape having an axis along the photographing optical axis direction, and the adjacent portions viewed in the circumferential direction around the axis are different magnetic poles. When it is a magnetic material and the second repulsive force generating part is a long magnetized material that can be inserted into the inner space of the first repulsive force generating part, ), The relative movement of the second repulsive force generating portion can be restricted, so that the mounting stage is mechanically held at the position where the second repulsive force generating portion is the central position in the first repulsive force generating portion. can do.

  In addition, since the mechanical holding can be performed by restricting the relative movement of the second repulsive force generating portion at the center position in the first repulsive force generating portion (the inner space), a single first repulsive force can be obtained. It is possible to provide a simple configuration in which the generating unit is provided on the mounting stage and the single second repulsive force generating unit is provided in the optical member housing frame. In other words, it can be realized only by providing a pair of the first repulsive force generating part and the second repulsive force generating part.

1 is a front view showing a digital camera 10 as an example of an imaging apparatus according to the present invention. 2 is an explanatory diagram showing a control block in the digital camera 10. FIG. In order to explain the configuration of the lens barrel 13, FIG. It is typical explanatory drawing which shows the state in which the lens barrel 13 was accommodated in the retracted position in the fixed cylinder part 13a in the cross section obtained along the II line | wire of FIG. It is explanatory drawing similar to FIG. 4 which shows the state by which the lens barrel 13 was drawn | fed out from the fixed cylinder part 13a. In order to explain the characteristic configuration of the digital camera 10, it is an explanatory diagram schematically showing a perspective view of a mounting stage 35 provided on a base plate 34. In order to explain the characteristic configuration of the digital camera 10, it is an explanatory view schematically showing a state in which a mounting stage 35 is provided on a base plate 34 in a front view. It is explanatory drawing typically shown by a perspective view in order to demonstrate the structure of both the 1st magnet 41 and the 2nd magnet 42, and the positional relationship of both. It is explanatory drawing for demonstrating the positional relationship between each 1st magnet 41 of the mounting stage 35, and each 2nd magnet 42 of the liner 33, and those effect | actions, (a) is that the mounting stage 35 is an origin position. (B) shows the mechanical holding state of the mounting stage 35. FIG. 6 is an explanatory diagram showing an enlarged view of the periphery of FIG. 5 in order to explain the positional relationship between the first magnet 41 and the second magnet. 5 is a flowchart illustrating an example of the content of a control process of a transition operation to a shooting standby state in a control unit 21. 5 is a flowchart illustrating an example of the content of control processing of a transition operation from a photographing standby state to a storage state in a control unit 21. FIG. 9 is an explanatory diagram similar to FIG. 7 for describing a characteristic configuration of a digital camera 102 according to a second embodiment. It is explanatory drawing similar to FIG. 4 for demonstrating the structure of the digital camera 102 obtained along the II-II line | wire of FIG. It is explanatory drawing similar to FIG. 5 for demonstrating the structure of the digital camera 102 obtained along the II-II line | wire of FIG. FIG. 10 is an explanatory view similar to FIG. 9 showing a mechanical holding state of the mounting stage 35 in the digital camera 102. FIG. 7 is an explanatory diagram similar to FIG. 6 for describing a characteristic configuration of a digital camera 103 according to a third embodiment. It is explanatory drawing similar to FIG. 4 for demonstrating the structure of the digital camera 103 obtained along the III-III line | wire of FIG. It is explanatory drawing similar to FIG. 5 for demonstrating the structure of the digital camera 103 obtained along the III-III line | wire of FIG. It is explanatory drawing for demonstrating the structure of the 1st magnet 413, (a) is shown with a typical perspective view, (b) is shown with the front view which looked at (a) from upper direction (object side). Yes. It is explanatory drawing for demonstrating the structure of the 2nd magnet 423, (a) is shown with a typical perspective view, (b) is shown with the front view which looked at (a) from upper direction (object side). Yes. It is explanatory drawing for demonstrating the positional relationship of the 1st magnet 413 and the 2nd magnet 423. FIG. FIG. 17 is an explanatory view similar to FIGS. 9 and 16 showing a mechanical holding state of the mounting stage 353 in the digital camera 103. FIG.

  Embodiments of an image pickup apparatus according to the present invention will be described below with reference to the drawings.

  A digital camera 10 of Example 1 as an example of an imaging apparatus according to the present invention will be described with reference to FIGS. In FIG. 9, for ease of understanding, the mounting stage 35 is shown in a circle and the moving area MA with respect to the mounting stage 35 is highlighted. Are not necessarily consistent.

  The digital camera 10 according to the first embodiment has a camera shake correction function that corrects camera shake by moving the imaging device in a plane perpendicular to the photographing optical axis direction. As shown in FIG. 1, the digital camera 10 is provided with a lens barrel 13 to which a photographing optical system 12 as a photographing optical system is attached on the front side of the camera body 11. Although not shown, the photographing optical system 12 includes a plurality of optical members such as a fixed lens, a zoom lens, a focus lens, a shutter unit, and a diaphragm unit. The lens barrel 13 is located along a photographing optical axis of the photographing optical system 12 between a predetermined retracted position (stored state (see FIG. 4)) and a predetermined extended position (photographing standby state (see FIG. 5)). It can be moved. In the following, the photographing optical axis direction is taken as the Z-axis direction, and the plane perpendicular thereto is taken as the XY plane (see FIG. 3). In this specification, the optical axis in the photographic optical system 12, that is, the rotationally symmetric axis of each optical member is used as the photographic optical axis of the photographic optical system 12, that is, the digital camera 10.

  As shown in FIG. 2, the digital camera 10 supervises control of image data generation processing based on signals from the image sensor 22, driving of the lens barrel driving unit 23, the display unit 24, and the camera shake correction mechanism 30. It has the control part 21 performed automatically. The control unit 21 acquires an image with the imaging element 22 via the photographing optical system 12 (see FIG. 1), and appropriately displays the image on the display unit 24 provided on the rear surface side of the camera body 11. Detection signals are input to the control unit 21 from the position detection element 25 and the shake detection element 26.

The position detection element 25 detects the position of a mounting stage 35 to be described later. In the first embodiment, the position detection element 25 is configured by a Hall element and is provided on the mounting stage 35. The camera shake detection element 26 detects camera shake occurring in the digital camera 10 itself (its camera body 11). In the first embodiment, the camera shake detection element 26 is composed of a gyro sensor and is provided in the camera body 11. The shake detection element 26 can also be configured using an acceleration sensor. The lens barrel drive unit 23 is configured to move the lens barrel 13 between the housed state (see FIG. 4) and the photographing standby state (see FIG. 5). Each optical member of the photographing optical system 12 (see FIG. 1). A plurality of optical member housing frames for holding and housing each (not shown) are moved.
(Configuration of lens barrel 13)
As shown in FIGS. 3 to 5, the lens barrel 13 includes a fixed frame 31, a rotating cylinder 32, and a liner 33. As will be described later, the fixed frame 31 is integrally formed on the front side (subject side) of the base plate 34 on which the camera shake correction mechanism 30 is provided, and has a cylindrical fixed cylinder portion 31a (FIG. 3) inward. See). A rectilinear groove 31b and a cam groove 31c along the axial direction are formed on the inner peripheral surface of the fixed cylinder portion 31a. A key portion 33a (described later) of the liner 33 is engaged with the rectilinear groove 31b, and a cam follower 32a (described later) of the rotary cylinder 32 is engaged with the cam groove 31c. A rotating cylinder 32 is provided inside the fixed cylinder portion 31a.

  The rotary cylinder 32 has a cylindrical shape that can be inserted into the fixed cylinder portion 31a. A helicoid cam follower 32 a and a gear portion 32 b are formed on the outer peripheral surface of the base end portion of the rotating cylinder 32. The cam follower 32a is engaged with the cam groove 31c of the fixed cylinder portion 31a. Further, although not shown, a gear provided on the output shaft of the motor constituting the lens barrel drive unit 23 is screwed into the gear portion 32b. With such a configuration, when the driving force of a motor (not shown) is appropriately transmitted to the rotating cylinder 32 through a gear (not shown) screwed to the gear part 32b, Rotates around the photographing optical axis. At this time, since the cam follower 32a is engaged with the cam groove 31c of the fixed cylinder portion 31a in the rotary cylinder 32, the rotary cylinder 32 is fixed to the fixed cylinder portion 31a (fixed) by the guiding action of the cam follower 32a and the cam groove 31c. It moves in the direction of the photographic optical axis with respect to the frame 31). A liner 33 is provided inside the rotating cylinder 32.

  The liner 33 has a cylindrical shape that can be inserted into the rotary cylinder 32. A key portion 33 a is provided on the outer peripheral surface of the liner 33. The key portion 33a is formed to protrude from the base end portion, and engages with the rectilinear groove 31b of the fixed cylinder portion 31a. Although not shown, a guide groove provided along a surface orthogonal to the photographing optical axis is provided on the outer peripheral surface of the liner 33, and a key protrusion (not shown) of the rotary cylinder 32 is engaged. Combined. With such a configuration, the rotary cylinder 32 and the liner 33 move integrally in the photographing optical axis (shooting optical path) direction (Z-axis direction) and can be relatively rotated around the photographing optical axis. ing. Further, the liner 33 is prevented from rotating relative to the fixed cylinder portion 31a.

  Although not shown inside the liner 33, an optical member holding frame for holding each optical member (not shown) of the photographing optical system 12 (see FIG. 1) and the optical member holding frame for photographing light. Other rotating cylinders and other liners for moving in the axial direction are provided as appropriate. Although not shown, the inner surface of the liner 33 is provided inward to appropriately move each optical member (not shown) of the photographing optical system 12 (see FIG. 1) in the photographing optical axis direction. A rectilinear groove, a helicoid, and the like that are engaged with key projections, helicoids, and the like of each optical member housing frame (optical member holding frame, rotating cylinder, liner, and the like) are provided. For this reason, the fixed cylinder portion 31a, the rotary cylinder 32, and the liner 33, together with an optical member holding frame (not shown), other rotary cylinders, other liners, etc., each optical member (see FIG. 1) (see FIG. 1). It functions as an optical member housing frame for housing (not shown). The lens barrel drive unit 23 functions as an accommodation frame drive unit that appropriately drives the optical member accommodation frame by appropriately rotating the rotating cylinder 32 with a motor (not shown).

In the lens barrel 13, the driving force of the lens barrel drive unit 23 (see FIG. 2) (the motor thereof) is transmitted through a gear (not shown) in which the rotary cylinder 32 is screwed into the gear portion 32b. The gear is transmitted as appropriate and rotated in the fixed cylinder portion 31a. As a result, the lens barrel 13 shifts between a predetermined retracted position (stored state (see FIG. 4)) and a predetermined extended position (photographing standby state (see FIG. 5)), and the photographing optical system 12 (see FIG. 1). ) Each optical member (not shown) is moved in a predetermined manner.
(Configuration of the image stabilization mechanism 30)
The camera shake correction mechanism 30 corrects camera shake by moving the mounting stage 35 (image sensor 22) in a plane (XY plane) perpendicular to the photographing optical axis direction (Z-axis direction). As shown in FIGS. 6 and 7, the mounting stage 35 holds an image sensor 22 such as a CCD. Although not shown, the mounting stage 35 is held slidably in the X-axis direction by a slide frame, and the slide frame is held movably in the Y-axis direction by a slide holding frame fixed to the base plate 34. Thus, the base plate 34 is held movably along the XY plane. Although not shown, the slide frame has a pair of guide rods extending in the X-axis direction along both sides of the placement stage 35 as seen in the Y-axis direction. The mounting stage 35 is held by being slidably inserted into both sides in the Y-axis direction. Although not shown, the slide holding frame has a pair of guide bars extending in the Y-axis direction along both sides of the mounting stage 35 viewed in the X-axis direction. The slide frame is held by being slidably inserted into both sides in the X-axis direction. As a result, the mounting stage 35, that is, the image pickup device 22 held there, is placed on the base plate 34 to which the slide holding frame is fixed, that is, the photographing optical system 12 (see FIG. 1) of the lens barrel 13 (its photographing optical axis). On the other hand, it is movable along the XY plane within a predetermined range.

  Although not shown in the drawings, the above-mentioned slide holding frame is formed integrally with the permanent magnet so as to surround the slide frame, adjacent to the Y-axis direction or the X-axis direction, as viewed in the XY plane. Two yokes are provided. Two coils are provided on the back side of each yoke (the side opposite to the subject) so as to face each yoke in the Z-axis direction. In the mounting stage 35, each coil is fixed to an extending portion that extends to a position facing the yoke in the Z-axis direction on the back surface side (the side opposite to the subject) of the slide holding frame.

  In the camera shake correction mechanism 30, a magnetic force is appropriately generated in each coil, and an attractive repulsive force due to both magnetic forces is generated between each of the coils facing each other in the Z-axis direction (a permanent magnet formed integrally therewith). By appropriately acting, the mounting stage 35 can be moved in the X-axis direction and the slide frame (not shown) can be moved in the Y-axis direction. As described above, the mounting stage 35 is provided with the position detection element 25 (see FIG. 2) for detecting the position of the mounting stage 35.

  In the camera shake correction mechanism 30, under the control of the control unit 21 (see FIG. 2), the applied current to each coil is controlled based on the shake detection information detected by the above-described shake detection element 26 (see FIG. 2). . By this control, an attractive repulsion force by a magnetic force is appropriately applied between each coil and the yoke (permanent magnet formed integrally therewith). With this suction repulsive force, the mounting stage 35 is moved in the X-axis direction and the slide frame (not shown) is moved in the Y-axis direction so as to cancel camera shake. Here, in the camera shake correction mechanism 30, since this movement uses the attractive repulsion force due to the magnetic force, the position detection element 25 (see FIG. 2) will appropriately move to the set movement target position. Servo control is performed based on the position information.

  At this time, in the camera shake correction mechanism 30 (the control unit 21), the origin position in the XY plane in the movement range of the placement stage 35 (movement area MA (see FIG. 9 described later)) is set. In addition, the camera shake correction mechanism 30 (control unit 21) sets the movement target position based on the shake detection information from the shake detection element 26 (see FIG. 2), and the movement direction from the origin position to the movement target position and The movement amount is calculated, and the mounting stage 35 is moved in the movement direction by the movement amount. Note that the position of the mounting stage 35 in the XY plane is controlled by the attractive repulsive force due to the magnetic force, that is, the mounting stage 35 is controlled by controlling the current applied to each coil. In the following, the state of being in an arbitrary position is referred to as electrical holding.

  In the camera shake correction mechanism 30, the origin position in the electrical holding described above is determined by the slide frame and the slide holding frame so that the mounting stage 35 can be moved equally regardless of the moving direction on the XY plane. It coincides with the center position in a range (movable area MA (see FIG. 9) described later) that is freely movable on the XY plane. This is because it is not known in which direction on the XY plane the camera shake occurs, so that the mounting stage 35, that is, the imaging device 22 is moved in any direction on the XY plane with respect to the base plate 34. It is desirable to be able to move. Further, in the camera shake correction mechanism 30, the above-described origin position is positioned on the photographing optical axis in order to suppress image deterioration due to the influence of aberrations in the photographing optical system 12.

  For this reason, in the camera shake correction mechanism 30, in the electrically held state, the mounting stage 35, that is, the image sensor 22 is moved on the XY plane so as to cancel camera shake with reference to the origin position on the photographing optical axis. To correct camera shake. The origin position 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. For this reason, in the digital camera 10, that is, the camera shake correction mechanism 30, the control unit 21 controls the electric current applied to each coil based on the data of the origin position stored in the storage unit 21a (see FIG. 2). In the target holding state, the mounting stage 35, that is, the image sensor 22 can be moved to the origin position set on the photographing optical axis, and can be maintained at the origin position.

  In the digital camera 10 according to the first embodiment, the mounting stage 35 is provided with two first magnets 41 (41A and 41B when individually described). In the following description, in the placement stage 35 set as the origin position, the direction from the center position of the movement with respect to the base plate 34 toward the outside along the XY plane is defined as the radial direction of the placement stage 35, and the center position. Is the center position of the mounting stage 35. The first magnets 41 are provided so as to have a positional relationship of 90 degrees apart when viewed in the circumferential direction (rotation angle) centered on the center position of the mounting stage 35. In the first embodiment, both the first magnets 41 are positioned in the X-axis direction and the other (41B) is in the Y-axis direction when viewed from the center of the image sensor 22 held on the mounting stage 35. It is provided in the outer peripheral wall surface 35a of the mounting stage 35 so that it may be located.

  Both the first magnets 41 are plate-like members formed of a magnetic material (magnetized material), and as shown in FIG. 8, have a plate-like shape that is curved along the outer peripheral wall surface 35a. Both the first magnets 41 are attached to the mounting stage 35 by bonding the bonding surface 41a to the outer peripheral wall surface 35a. Both the first magnets 41 are provided on the mounting stage 35 so that the radial direction of the mounting stage 35 is the magnetization (magnetization) direction. In the first embodiment, the bonding surface 41a side is the S pole, The opposite surface 41b side located on the opposite side is the N pole.

  Further, in the digital camera 10 according to the first embodiment, the liner 33 is provided with the second magnet 42 (42A and 42B when individually described) (see FIGS. 4, 5 and 9, etc.). As shown in FIGS. 5 and 9, both the second magnets 42 are mounted on the mounting stage 35 when the lens barrel 13 (the liner 33) is in a predetermined retracted position (stored state (see FIG. 4)). The position is set so that the first magnets 41 provided on the outer peripheral wall surface 35 a are opposed to each other in the radial direction of the mounting stage 35. Further, as shown in FIG. 5, when the lens barrel 13 (liner 33) is set to a predetermined extended position (photographing standby state), both the second magnets 42 are arranged in the radial direction of the mounting stage 35. The position is set so that the facing relationship with the one magnet 41 is eliminated. In the first embodiment, as shown in FIG. 9, both the second magnets 42 have an X axis as viewed from the central axis of the optical member housing frame including the liner 33, that is, the photographing optical axis of the photographing optical system 12. And the other (42B) is provided on the inner peripheral wall surface 33b of the liner 33 so as to be positioned in the Y-axis direction.

  Both the second magnets 42 are plate-like members formed of a magnetic material (magnetization material), and are curved following the inner peripheral wall surface 33b (see FIG. 9) of the liner 33, as shown in FIG. It has a plate shape. Both the second magnets 42 are attached to the liner 33 by being bonded to a recess (see FIGS. 4, 5, 8, 10 and the like) formed on the inner peripheral wall 33b. Yes. Both the second magnets 42 are provided on the liner 33 so that the radial direction of the mounting stage 35 is the magnetization (magnetization) direction. In the first embodiment, the bonding surface 42a side is the S pole, and the opposite side thereof. The opposite surface 42b side located at the center is an N pole.

  In addition, both the second magnets 42 can be present by moving the mounting stage 35 with respect to the base plate 34 when viewed in the direction along the XY plane (hereinafter referred to as a moving region MA (see FIG. 9)). It is provided in an outer position than (also called). That is, as described above, the slide frame is movable within a predetermined range in the Y-axis direction with respect to the slide holding frame fixed to the base plate 34, and the mounting stage 35 is X with respect to the slide frame. Since it can move in a predetermined range in the axial direction, as shown in FIG. 9, if the mounting stage 35 is disc-shaped, the moving area MA has a rectangular shape as a whole and has four corners. Is equal to the outer peripheral shape of the mounting stage 35. Both the second magnets 42 are located outside the moving area MA so as not to interfere with the mounting stage 35 and both the first magnets 41 provided there regardless of the position of the mounting stage 35. Is provided. In the first embodiment, since both the first magnets 41 are provided on the outer peripheral wall surface 35a of the mounting stage 35, both the second magnets 42 consider the thickness dimension of both the first magnets 41 from the moving area MA. It is provided at the position. Specifically, as shown in FIG. 10, when the placement stage 35 is at the origin position, the first magnet 41 provided there is within the movement area MA (see FIG. 9) of the placement stage 35. It is assumed that by the movement at, a predetermined dimension α can be moved toward the second magnet 42 side. On the other hand, the second magnet 42 has an additional dimension β added to the movable distance α from the facing surface 41b of the first magnet 41 when the facing surface 42b of the second magnet 42 is at the origin position. The position is set so as to leave an interval.

  Next, the operation of both the first magnets 41 and both the second magnets 42 accompanying the operation of the lens barrel 13 will be described. In the lens barrel 13 (digital camera 10 (see FIG. 1)), when it is in the shooting standby position (position shown in FIG. 5), the rotating cylinder 32 and the liner 33 are within the fixed cylinder portion 31a. The position is projected (displaced) to the opposite side (subject side). At this time, as described above, the opposing relationship between the second magnets 42 and the first magnets 41 in the radial direction of the mounting stage 35 is eliminated (see FIG. 5). At this time, the mounting stage 35 (imaging device 22) is not affected by the magnetic force acting between the first magnets 41 and the second magnets 42 from the viewpoint of movement with respect to the base plate 34. Thus, the camera shake correction mechanism 30 becomes operable. Hereinafter, this is referred to as a released state.

  In the lens barrel 13 (digital camera 10 (see FIG. 1)), if there is a request for shifting from the shooting standby position (position shown in FIG. 5) to the retracted position (position shown in FIG. 4), the lens barrel. The driving force of the drive unit 23 (see FIG. 2) (the motor thereof) is appropriately transmitted to the gear, the rotating cylinder 32 is rotated in the fixed cylinder portion 31a, and the rotating cylinder 32 and the liner 33 are fixed with the rotation. It is accommodated in the frame 31 (its fixed cylinder part 31a). As a result, in the lens barrel 13, each optical member (not shown) of the photographing optical system 12 (see FIG. 1) moves in a predetermined manner and shifts to a predetermined retracted position (stored state (see FIG. 4)). To do.

Thus, when the liner 33 is in the retracted position (position shown in FIG. 4), the two second magnets 42 provided on the liner 33 are mounted on the first magnets 41 of the mounting stage 35. It will oppose in the radial direction of the mounting stage 35 (refer FIG. 4 etc.). Then, as shown in FIG. 9A, the opposing surface 41b of the first magnet 41A and the opposing surface 42b of the second magnet 42A are opposed to each other in the X-axis direction when viewed in the direction along the XY plane. The opposing surface 41b of the first magnet 41B and the opposing surface 42b of the second magnet 42B are opposed to each other in the Y-axis direction. At this time, both the first magnets 41 and the two second magnets 42 have the radial direction of the mounting stage 35 as a magnetization (magnetization) direction, and both the first magnets 41 have an N pole on the facing surface 41b side. And both the 2nd magnets 42 are made into the north-pole at the opposing surface 42b side. For this reason, a repulsive force (repulsive force) acts between the first magnets 41 and the second magnets 42 in the direction along the XY plane. Here, when viewed in a direction along the XY plane, the liner 33 is provided with a fixed position with respect to the fixed frame 31 and the base plate 34 fixed thereto via the rotating cylinder 32 and the fixed cylinder portion 31a. Yes. On the other hand, the mounting stage 35 is provided movably in a direction along the XY plane with respect to the base plate 34. In addition, relative rotation between the liner 33 and the base plate 34 is prevented. For this reason, when the electrical holding by the camera shake correction mechanism 30 is released, the mounting stage 35 is repulsive (repulsive) between the first magnets 41 and the second magnets 42 as shown in FIG. Force) in the movement area MA, the position moves to the position farthest from the first magnet 41B in the X-axis direction and farthest from the first magnet 41A in the Y-axis direction. Then, the mounting stage 35 can be moved by the end plate in the moving area MA, that is, by the base plate 34 via the slide holding frame and the slide frame, by the repulsive force (repulsive force) between the first magnets 41 and the second magnets 42. It is pressed against the end of the support structure, and movement relative to the base plate 34 is restricted. Hereinafter, this is referred to as a holding state, and the holding state due to the repulsive force (repulsive force) between the first magnets 41 and the second magnets 42 is referred to as mechanical holding. That is, in the digital camera 10, when the photographing optical system 12 is changed from the photographing standby state (see FIG. 5) to the housed state (see FIG. 4) by the lens holding frame driving means (lens barrel driving unit 23), A repulsive force (repulsive force) acts between the first magnet 41 and the two second magnets 42 to move the mounting stage 35 in the direction perpendicular to the photographic optical axis (Z axis) (movement along the XY plane). Is mechanically regulated. For this reason, both the first magnets 41 function as a first repulsive force generating unit, and both the second magnets 42 function as a second repulsive force generating unit.
(Transition to standby mode)
Next, the transition operation to the shooting standby state in the digital camera 10 of the first embodiment will be described. FIG. 11 is a flowchart showing an example of the content of the control process of the transition operation to the photographing standby state in the control unit 21 that controls the operation of the digital camera 10 in an integrated manner. Hereafter, each step of the flowchart of FIG. 11 which is an example of the control process in the control part 21 in the operation | movement to transfer to this imaging | photography standby state is demonstrated.

  In step S1, when a power switch (not shown) of the digital camera 10 (not shown) is turned on, the process proceeds to step S2 in order to enter the photographing standby state, that is, to shift from the storage state to the photographing standby state.

  In step S2, since a power switch (not shown) is turned on in step S1, control for setting the lens barrel 13 to the photographing standby position is started so that the photographing optical system 12 can be photographed. Proceed to step S3. In step S2, the lens barrel drive unit 23 (see FIG. 2) is driven and controlled, so that the lens barrel 13 is moved from the retracted position (see FIG. 4) to the front (object side) photographing standby position (FIG. 5). To see). As a result, the liner 33 of the lens barrel 13 is also moved toward the object side in the direction of the photographic optical axis with respect to the mounting stage 35, and the photographic optical system 12 is ready to shoot (see FIG. 5). As a result, as described above, the opposing relationship between the second magnets 42 and the first magnets 41 in the radial direction of the mounting stage 35 is canceled, and both the first magnets 41 and the second magnets 42 are brought into contact with each other. It becomes a release state.

  In step S3, following the start of the control for setting the lens barrel 13 in the photographing standby position in step S2, the control for electrically holding the mounting stage 35 at the origin position is started, and this flowchart is ended. In this step S3, in the state of electrical holding by the camera shake correction mechanism 30, the mounting stage 35 (imaging element 22) is moved to the origin position set on the optical axis and maintained at the origin position. Control to start. That is, in step S3, the mounting stage 35 is electrically held at the origin position by controlling the current applied to each coil based on the origin position data stored in the storage unit 21a. In the first embodiment, when the lens barrel 13 (liner 33) is set in the shooting standby state in step S2, both the first magnet 41 and the second magnet 42 are released in the course of the operation, that is, the machine. Before the target holding is released, an operation of setting the mounting stage 35 in step S3 to the origin position by electrical holding is executed. This is to prevent the mounting stage 35 from being in a state where both mechanical holding and electrical holding are released.

Due to this transition to the shooting standby state, the digital camera 10 becomes ready for shooting, and the mounting stage 35 (imaging device 22) changes from the mechanically held state to the electrically held state by the camera shake correction mechanism 30. Transition. At this time, in the digital camera 10, an image acquired under the control of the control unit 21 is displayed on the display unit 24 (see FIG. 2), and the 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 30 is not executed, and when the camera shake correction switch (not shown) is turned ON, the camera shake correction mechanism 30 immediately. The camera shake correction by is executed.
(Transition to storage state)
Next, the transition operation from the shooting standby state to the storage state in the digital camera 10 of Embodiment 1 will be described. FIG. 12 is a flowchart illustrating an example of the content of the control process of the transition operation from the shooting standby state to the storage state in the control unit 21 that controls the operation of the digital camera 10 in an integrated manner. Hereinafter, each step of the flowchart of FIG. 12 which is an example of the control process in the control part 21 in the transition operation from the photographing standby state to the storage state will be described.

  In step S11, when a power switch (not shown) of the digital camera 10 (not shown) is turned off, the process proceeds to step S12 in order to enter the storage state, that is, to shift from the photographing standby state to the storage state.

  In step S12, since a power switch (not shown) is turned off in step S11, control for setting the lens barrel 13 to the retracted position is started, and the process proceeds to step S13. In step S12, the lens barrel drive unit 23 (see FIG. 2) is driven to control the lens barrel 13 (liner 33) from the photographing standby position (see FIG. 5) to the rear side (image sensor 22 side). To the retracted position (see FIG. 4). As a result, the photographing optical system 12 is stored (see FIG. 4), and both the second magnets 42 of the liner 33 are in the radial direction of the mounting stage 35 with respect to both the first magnets 41 of the mounting stage 35. Opposite (see FIG. 4 and FIG. 9A).

  In step S13, following the start of the control for setting the lens barrel 13 in the retracted position in step S12, the electrical holding of the mounting stage 35 is stopped, and this flowchart is ended. In step S13, electrical holding by the camera shake correction mechanism 30 is stopped, that is, application of current to each coil is stopped. At this time, since the liner 33 is stored in step S12, both the second magnets 42 of the liner 33 face both the first magnets 41 of the mounting stage 35 in the radial direction of the mounting stage 35. Since it is in the mechanical holding state, the mounting stage 35 does not move unintentionally. In the first embodiment, when the lens barrel 13 is set to the retracted position in step S12, a distance in which repulsive force (repulsive force) acts between the second magnets 42 and the first magnets 41 in the course of the operation. Then, the electrical holding of the mounting stage 35 in step S13 is stopped. This is to reduce power consumption while preventing the mounting stage 35 from colliding with both the mechanical holding action and the electric holding action.

  By the transition operation from the photographing standby state to the housed state, in the digital camera 10, the photographing optical system 12 is placed in the housed state and is brought into the housed state. At this time, the image display on the display unit 24 is also stopped.

  In the digital camera 10 according to the first embodiment of the present invention, when the imaging optical system 12 is in the storage position, both the second magnets 42 provided on the liner 33 as the optical member storage frame of the imaging optical system 12 are placed on the mounting stage. The first magnet 41 and the mounting stage 35 are opposed to each other in the radial direction. The repulsive force acting between the second magnets 42 and the first magnets 41 is used. The mounting stage 35 can be mechanically held. For this reason, the liner 33 (optical member housing frame), the mounting stage 35, and the new member only for mechanical holding without contacting the liner 33 (optical member housing frame) and the mounting stage 35 are provided. Mechanically restricting the mounting stage 35 to move in the direction perpendicular to the photographic optical axis (Z axis) (moving along the XY plane) with respect to the base plate 34 without being brought into contact with each other. That is, the mounting stage 35 can be mechanically held without contact. Thereby, in the transition to the mechanical holding of the mounting stage 35 or in the mechanical holding state, the pressing force in the XY direction generated in the liner 33 (optical member housing frame) can be made extremely small, It is possible to reliably prevent the pressing force in the Z-axis direction (photographing optical axis direction) from being generated on the mounting stage 35.

  In the digital camera 10, the stage 35 is moved in the Z-axis direction (photographing optical axis direction) in accordance with the transition between the settling position and the photographing standby position in the photographing optical system 12. Since both the second magnets 42 are provided on the liner 33 as an optical member housing frame that approaches or moves away from the mounting stage 35, it is necessary to use a new driving mechanism only for mechanical holding. In the digital camera in which the increase in power consumption can be prevented and the thickness of the lens barrel 13 in the optical axis direction can be reduced. In addition, a structure (both first magnet 41 and both second magnets 42) for mechanical holding can be provided without interfering with surrounding parts, wiring, and the like.

  Further, since both the first magnet 41 and both the second magnets 42 are used as the magnetizing material in the digital camera 10, the opposing surface 41b and the opposing surface 42b that are opposed to each other at the settling position are made to have the same magnetic pole. Since the repulsive force (repulsive force) can be generated between both the first magnets 41 and both the second magnets 42 simply by setting (N pole in the first embodiment), mounting in a non-contact manner with a simple configuration. The mechanical holding of the mounting stage 35 can be realized.

  In the digital camera 10, the mounting stage 35 is pressed against the end in the moving area MA by the repulsive force (repulsive force) between the first magnets 41 and the second magnets 42. Therefore, since only two sets of the first magnet 41 and the second magnet 42 need be used, the configuration can be simplified.

  In the digital camera 10, two first magnets 41 as first repulsive force generation units and two second magnets 42 as second repulsive force generation units are arranged in a circumferential direction (rotation) around the center position on the mounting stage 35. The mounting stage 35 that is movable along the XY plane can be mechanically held more stably because the positional relationship is 90 degrees apart from the angle.

  In the digital camera 10, both the second magnets 42 are set so as to have a distance obtained by adding the additional dimension β to the movable distance α from the first magnet 41 with respect to the mounting stage 35 at the origin position. That is, since it is provided at a position in consideration of the thickness dimension of both the first magnets 41 from the moving area MA, the placement stage 35 and the place therefor regardless of the place. Can be prevented from interfering with both the first magnets 41 provided in the. For this reason, both the first magnets 41 and the two second magnets 42 can be reliably prevented from hindering the transition between the settling position and the photographing standby position in the photographing optical system 12.

  In the digital camera 10, both the second magnets 42 for mechanical holding are attached to the liner 33 which is one of the optical member housing frames located closest to the image sensor 22 when the photographing optical system 12 is set to the retracted position. Therefore, both the second magnets 42 can be easily positioned in the radial direction of the mounting stage 35, and both the first magnets 41 can be simply provided on the outer peripheral wall surface 35 a of the mounting stage 35. Since the 1 magnet 41 and the both 2nd magnets 42 can be made to oppose in the direction along a XY plane, it can be set as a simple structure.

  In the digital camera 10, when the photographing optical system 12 (liner 33) is set in the photographing standby state (see step S2), both the first magnet 41 and the two second magnets 42 are released in the course of the operation, that is, the machine. Since the operation of setting the mounting stage 35 to the origin position by electrical holding is executed before the target holding is released (see step S3), the mechanical holding and the electrical holding of the mounting stage 35 are performed. It is possible to prevent a state in which both are released.

  Therefore, in the digital camera 10 according to the present invention, it is possible to prevent generation of pressing force on the photographing optical system 12 and the image sensor 22 while suppressing power consumption.

  In the first embodiment, the two first magnets 41 serving as the first repulsive force generating unit and the two second magnets 42 serving as the second repulsive force generating unit are arranged in a circumferential direction centered on the center position of the mounting stage 35 ( Although the positional relationship is 90 degrees apart when viewed in terms of the rotation angle), the mounting stage 35 is moved to the end of the moving region MA by the repulsive force (repulsive force) between the first repulsive force generator and the second repulsive force generator. As long as it can be pressed against the base plate 34 and the movement with respect to the base plate 34 can be restricted, it is not limited to the first embodiment described above.

  Next, a digital camera 102 according to the second embodiment of the present invention will be described. The second embodiment is an example in which the arrangement relationship and the number of the first repulsive force generating units and the second repulsive force generating units are different from those of the first exemplary embodiment. Since the basic configuration of the digital camera 102 according to the second embodiment is the same as that of the imaging apparatus 10 according to the first embodiment, the same reference numerals are given to portions having the same configuration, and detailed description thereof is omitted. . FIG. 13 is an explanatory diagram similar to FIG. 7 for describing a characteristic configuration of the digital camera 102 according to the second embodiment. FIG. 14 is an explanatory view similar to FIG. 4 for explaining the configuration of the digital camera 102 obtained along the line II-II in FIG. FIG. 15 is an explanatory view similar to FIG. 5 for explaining the configuration of the digital camera 102 obtained along the line II-II in FIG. FIG. 16 is an explanatory view similar to FIG. 9 showing the mechanical holding state of the mounting stage 35 in the digital camera 102.

  In the digital camera 102 according to the second embodiment, as illustrated in FIGS. 13 to 16, in the mounting stage 35, three first magnets 412 are provided as first repulsive force generating units. Each of the first magnets 412 has the same configuration as the first magnet 41 of the first embodiment, is formed of a magnetic material (magnetized material), and has an opposing surface 41b side as an N pole. The three first magnets 412 are provided so as to have a positional relationship of 120 degrees apart from each other when viewed in the circumferential direction (rotation angle) centered on the center position of the mounting stage 35. That is, the three first magnets 412 are provided on the mounting stage 35 so as to surround the mounting stage 35 when viewed in the direction along the XY plane.

  In the digital camera 102, the liner 33 is provided with three second magnets 422 as the second repulsive force generation unit. Each of the second magnets 422 has the same configuration as that of the second magnet 42 of the first embodiment, is formed of a magnetic material (magnetized material), and has a facing surface 42b side as an N pole. Similarly to the second magnet 42 of the first embodiment, when the liner 33 is set to the retracted position (position shown in FIG. 14), each of the second magnets 422 is mounted on the second magnet 422. The liner 33 is provided so as to face each first magnet 412 of the placement stage 35 in the radial direction of the placement stage 35 (see FIG. 16 and the like).

  In the digital camera 102, when the liner 33 is in the retracted position (position shown in FIG. 14), the opposing surface 41b of each first magnet 412 and each second magnet 422 are viewed in the direction along the XY plane. The facing surface 42b faces in the radial direction of the mounting stage 35 (see FIG. 16 and the like). Then, as shown in FIG. 16, the three first magnets 412 are provided on the mounting stage 35 so as to surround the mounting stage 35 when viewed in the direction along the XY plane. A repulsive force (repulsive force) acts between the first magnet 412 and each second magnet 422 in the direction along the XY plane, so that the mounting stage 35 is a base plate at the center position, that is, the origin position in the moving area MA. Movement with respect to 34 is restricted. For this reason, in the digital camera 102, the mounting stage 35 can be mechanically held at the origin position.

  In the digital camera 102 according to the second embodiment, similarly to the digital camera 10 according to the first embodiment, the transition operation to the photographing standby state is performed and the transition operation to the storage state is performed. Then, when the photographing optical system 12 is placed in the retracted state and the liner 33 is set to the retracted position, the mounting stage 35 is mechanically held at the origin position.

  Since the digital camera 102 according to the second embodiment basically has the same configuration as that of the digital camera 10 according to the first embodiment, basically the same effects as those of the first embodiment can be obtained.

  In addition, in the digital camera 102 according to the second embodiment, three first magnets 412 are provided so as to surround the mounting stage 35 as first repulsive force generating units, and three second magnets 422 are used as second repulsive force generating units. Are positioned so as to face the corresponding first magnets 412 in the radial direction of the mounting stage 35. When the mounting stage 35 is positioned at the center position (origin position) in the moving area MA, three first magnets are provided. Since the positional relationship is set so that the repulsive force (repulsive force) generated by 412 and the three second magnets 422 is balanced, the mounting stage 35 is mechanically held at the center position (origin position) in the moving area MA. Can do.

  Further, in the digital camera 102, it is not necessary to press the mounting stage 35 against the end portion in the moving area MA in the mechanical holding state, so that the mounting stage 35 can be moved with respect to the base plate 34. Such a load can be further reduced.

  Furthermore, in the digital camera 102, when the photographing optical system 12 is in the retracted state, regardless of the position of the mounting stage 35 in the moving area MA, the mounting stage 35 is positioned at the center position (in the moving area MA) without causing power consumption. It can be moved to the origin position) and mechanically held at the center position (origin position). Here, in the electrical holding, basically, since the mounting stage 35 is set to the origin position, the transition from the mechanical holding to the electrical holding can be made smoother.

  In the digital camera 102, when the photographing optical system 12 (liner 33) is set in a photographing standby state (see step S2 in FIG. 11), both the first magnets 41 and the two second magnets 42 are in a released state in the course of the operation. That is, before the mechanical holding is released, an operation of setting the mounting stage 35 to the origin position by electrical holding is executed (see step S3). It is possible to prevent the state in which both the holding and the releasing are generated, and it is possible to stabilize the imaging element 22 (the mounting stage 35) by electrical holding when the imaging standby state is set. This is based on position information from the position detection element 25 (see FIG. 2) so that the camera shake correction mechanism 30 appropriately moves to the origin position by using the attractive repulsion force due to the magnetic force in the electrically held state. Although the servo control is performed, since the position of the mounting stage 35 in the mechanical holding is the origin position by the electric holding, the movement amount of the mounting stage 35 accompanying the shift from the mechanical holding to the electric holding is extremely small. (Theoretically does not move).

  In the digital camera 102, since the position of the mounting stage 35 in the mechanical holding is the origin position by the electric holding, when the digital camera 10 (shooting optical system 12) is in the shooting standby state, the camera shake immediately occurs. Appropriate camera shake correction by the correction mechanism 30 can be executed.

  In the digital camera 102, the position of the mounting stage 35 in the mechanical holding and the origin position in the electric holding are set so that the center of the image sensor 22 is positioned on the optical axis. When the optical system 12) is placed in a shooting standby state, it is possible to immediately perform appropriate camera shake correction by the camera shake correction mechanism 30 and to prevent image deterioration.

  In the digital camera 102, since the position of the mounting stage 35 in the mechanical holding and the origin position in the electric holding coincide with the center position in the moving area MA, the digital camera 102 (the shooting optical system 12) is in a shooting standby state. When the state is set, the camera shake correction mechanism 30 can immediately execute the camera shake correction, and the camera shake correction can be executed for the camera shake in any direction along the XY plane. It is possible to prevent image deterioration.

  Therefore, in the digital camera 102 according to the second embodiment, it is possible to prevent generation of pressing force on the photographing optical system 12 and the image sensor 22 while suppressing power consumption.

  In the second embodiment described above, the three first magnets 412 have a positional relationship of 120 degrees apart from each other when viewed in the circumferential direction (rotation angle) centered on the center position of the mounting stage 35. Although provided, when the mounting stage 35 is positioned at the center position (origin position) in the moving area MA, the repulsive forces (repulsive forces) generated by the three first magnets 412 and the three second magnets 422 are balanced. In addition, it is sufficient that at least three first repulsive force generating portions (first magnets 412) are provided on the mounting stage 35 so as to surround the center position of the mounting stage 35 when viewed in the direction along the XY plane. It is not limited to the above-described second embodiment.

  Next, a digital camera 103 according to Embodiment 3 of the present invention will be described. The third embodiment is an example in which the configurations of the first repulsive force generating unit and the second repulsive force generating unit are different from those of the first and second exemplary embodiments. Since the basic configuration of the digital camera 103 according to the third embodiment is the same as that of the image pickup apparatus 10 according to the first embodiment described above, the same reference numerals are given to portions having the same configuration, and detailed description thereof is omitted. . FIG. 17 is an explanatory diagram similar to FIG. 6 for describing a characteristic configuration of the digital camera 103 according to the third embodiment. 18 is an explanatory view similar to FIG. 4 for explaining the configuration of the digital camera 103 obtained along the line III-III in FIG. FIG. 19 is an explanatory view similar to FIG. 5 for explaining the configuration of the digital camera 103 obtained along the line III-III in FIG. 20A and 20B are explanatory views for explaining the configuration of the first magnet 413. FIG. 20A is a schematic perspective view, and FIG. 20B is a front view of FIG. 20A viewed from above (subject side). It is shown in the figure. FIG. 21 is an explanatory diagram for explaining the configuration of the second magnet 423, where (a) is a schematic perspective view, and (b) is a front view of (a) as viewed from above (subject side). It is shown in the figure. FIG. 22 is an explanatory diagram for explaining the positional relationship between the first magnet 413 and the second magnet 423. FIG. 23 is an explanatory view similar to FIGS. 9 and 16 showing a mechanical holding state of the mounting stage 353 in the digital camera 103.

  In the digital camera 103 according to the third embodiment, as illustrated in FIGS. 17 to 19, the mounting stage 353 is provided with a single first magnet 413 as a first repulsive force generator. The first magnet 413 is provided in an installation hole 353 b provided in the placement stage 353. The installation hole 353b is formed so as to penetrate the mounting stage 353 in the Z-axis direction, and has a circular cross-sectional shape along the XY plane. The first magnet 413 is fitted inside the installation hole 353b.

  The first magnet 413 has a cylindrical shape (see FIG. 20) and has an outer diameter dimension that can be fitted to the inner peripheral surface of the installation hole 353b. In addition, the first magnet 413 has an inner diameter dimension that can receive the second magnet 423 regardless of a change in relative positional relationship, as will be described later. As shown in FIG. 20, the first magnet 413 is formed by joining a plurality of magnetic materials (magnetization materials) whose magnetization (magnetization) direction is the radial direction (radial direction) from the axis. ing. In the first magnet 413, the adjacent portions are different magnetic poles when viewed in the circumferential direction around the axis. In the third embodiment, the first magnet 413 includes four magnets 413A, 413B, 413C, and 413D each having a fan-shaped cross section along the XY plane, with both end faces 413c viewed in the circumferential direction centering on the axis. It is formed by bonding. The magnet 413A and the magnet 413C have an adhesion surface 413a serving as an outer curved surface as an N pole and an opposing surface 413b serving as an inner curved surface positioned on the opposite side thereof as an S pole. In addition, the magnet 413B and the magnet 413D have an adhesion surface 413a that is an outer curved surface as an S pole, and an opposing surface 413b that is an inner curved surface located on the opposite side thereof as an N pole.

  The first magnet 413 is provided on the mounting stage 353 with the outer peripheral surface formed by continuously connecting the adhesive surfaces 413a of the magnets 413A, 413B, 413C, and 413D adhered to the inner peripheral surface of the installation hole 353b. ing. In the first magnet 413, since the second magnet 423 is received inward, the inner peripheral surface (each inner curved surface) located on the opposite side to each bonding surface 413a forms each facing surface 413b. On the inner peripheral surface, when viewed in the circumferential direction around the axis, the opposing surfaces 413b of the magnets 413A and 413C are S poles, and the opposing surfaces 413b of the magnets 413B and 413D are N poles, Adjacent locations are different magnetic poles. In the first magnet 413, the magnet 413A and the magnet 413C are positioned in the X axis direction with respect to the axis, and the magnet 413B and the magnet 413D are positioned in the Y axis direction with respect to the axis when viewed in the direction along the XY plane. As described above, the mounting stage 353 is provided.

  Further, in the digital camera 103, as shown in FIGS. 18 and 19, the liner 333 is provided with a single second magnet 423 as a second repulsive force generation unit. The second magnet 423 has a cylindrical shape (see FIG. 21), and is provided to extend in the Z-axis direction from an extending portion 333c provided in the liner 333. The second magnet 423 is inserted inward of the first magnet 413 provided in the mounting stage 353 (its installation hole 353b) when the photographing optical system 12 is stored (see FIG. 18). At the same time, when the photographing optical system 12 is in a photographing standby state (see FIG. 19), the length dimension is set to be detached from the first magnet 413 of the mounting stage 353. Furthermore, the second magnet 423 is mutually axial with respect to the first magnet 413 of the mounting stage 353 (imaging device 22) at the origin position in electrical holding as seen in the direction along the XY plane. Are set to coincide with each other (see FIG. 23).

  The second magnet 423 has an outer diameter that allows the first magnet 413 to be inserted inward regardless of a change in the relative positional relationship. As described above, this is because the mounting stage 353 is movable with respect to the liner 333 within the movement region MA (see FIG. 23 and the like). Specifically, the second magnet 423 is a region where the first magnet 413 cannot exist inside the installation hole 353b when viewed in the direction along the XY plane, that is, the inner peripheral surface of the first magnet 413. The outer diameter dimension is within an area (hereinafter also referred to as a non-contact area EA (see FIG. 22)) inside an area where the facing surface 413b can be located. For this reason, the second magnet 423 is prevented from interfering with the first magnet 413 regardless of the state of the photographing optical system 12. As shown in FIG. 22, the non-contact area EA has a shape having four corners formed by four arcs equal to the inner peripheral surface (each facing surface 413 b) of the first magnet 413.

  When the second magnet 423 is inserted into the first magnet 413 of the mounting stage 353 (its installation hole 353b) at the origin position, the second magnet 423 is seen in the radial direction from both axes. A plurality of magnetic materials (magnetization materials) are joined to each other so that the same magnetic poles are opposed to each facing surface 413b (inner peripheral surface). On the outer peripheral surface (each opposing surface 423b described later) of the second magnet 423, the opposing surface 413b (inner peripheral surface) of the magnet 413A and the opposing surface 413b (inner peripheral surface) of the magnet 413C when viewed in a plane along the XY plane. ) And the opposite surface 413b (inner peripheral surface) of the magnet 413B and the opposite surface 413b (inner peripheral surface) of the magnet 413D in the Y axis direction are N. It is considered as a pole.

  In the third embodiment, the second magnet 423 is formed of two magnets 423A and 423B having a semicircular cross section along the XY plane, as shown in FIG. Each of the magnets 423A and 423B has a halved shape obtained by dividing a cylinder into two by a plane including its axis, and the flat surfaces 423c are joined to each other. The magnet 423A has an S pole on one side along the flat surface 423c and an N pole on the other side, and the magnet 423B has an S pole on the other side in the direction along the flat surface 423c and an N pole on one side. It is said that.

  In the second magnet 423, the outer peripheral surface formed by continuing the opposing surfaces 423b on the outer curved surfaces of the magnets 423A and 423B is opposed to the opposing surface 413b (inner peripheral surface) of the first magnet 413. . In the second magnet 423, the S pole side of the facing surface 423b of the magnet 423A faces the facing surface 413b (inner peripheral surface) of the magnet 413A in the X-axis direction, and the N pole side of the facing surface 423b faces the facing surface 413b of the magnet 413B ( The inner pole surface of the magnet 423B faces the facing surface 413b (inner circumferential face) of the magnet 413C in the X-axis direction, and the north pole side of the facing surface 423b faces the magnet 413D. The liner 333 (its extended portion 333c) is provided so as to face the surface 413b (inner peripheral surface) in the Y-axis direction (see FIG. 22).

  In the digital camera 103, when the liner 333 is in the retracted position (the position shown in FIG. 18), the second magnet 423 provided in the extending portion 333c is provided in the placement stage 353 (its installation hole 353b). The first magnet 413 is inserted inward. Then, as shown in FIG. 22, when viewed in a direction along the XY plane, a portion located in the Y-axis direction is an N pole in each facing surface 413 b that is an inner peripheral surface of the annular first magnet 413. In addition, the position located in the X-axis direction is the S pole, and the position located in the Y-axis direction is the N pole in each facing surface 423b that is the outer peripheral surface of the circular second magnet 423. Since the portion located in the X-axis direction is the S pole, repulsive force (repulsive force) acts in the direction along the XY plane between the first magnet 413 and the second magnet 423. This repulsive force (repulsive force) is directed to the center position from both edges viewed in the X-axis direction and from both edges viewed in the Y-axis direction in the first magnet 413 (installation hole 353b). It acts on the second magnet 423 so as to press it toward the back. For this reason, the movement of the second magnet 423 is restricted at the center position of the first magnet 413 (installation hole 353b), that is, the center position in the non-contact area EA. Here, when viewed in the direction along the XY plane, the liner 333 is provided with a fixed position relative to the fixed frame 31 and the base plate 34 fixed thereto via the rotating cylinder 32 and the fixed cylinder portion 31a. Yes. On the other hand, the mounting stage 353 is provided movably in a direction along the XY plane with respect to the base plate 34. In addition, relative rotation between the liner 333 and the base plate 34 is prevented. Therefore, when the electrical holding by the camera shake correction mechanism 30 is released, the placement stage 353 is restricted from moving relative to the base plate 34 at the center position in the movement area MA, that is, the origin position, as shown in FIG. . Thereby, in the digital camera 103, the mounting stage 353 can be mechanically held at the origin position.

  In the digital camera 103 according to the third embodiment, similarly to the digital camera 10 according to the first embodiment, the transition operation to the photographing standby state is performed and the transition operation to the storage state is performed. Then, when the photographing optical system 12 is in the retracted state and the liner 333 is set to the retracted position, the mounting stage 353 is mechanically held at the origin position.

  Since the digital camera 103 according to the third embodiment basically has the same configuration as that of the digital camera 10 according to the first embodiment, basically the same effects as those of the first embodiment can be obtained.

  In addition, in the digital camera 103 according to the third embodiment, a cylindrical first magnet 413 is provided on the mounting stage 353 as a first repulsive force generating unit, and a cylindrical second magnet 423 is provided as a second repulsive force generating unit. Each of the first magnets 413 can be inserted inwardly of the first magnet 413 so that when the second magnet 423 is positioned at the center position of the first magnet 413, the repulsive force (repulsive force) of both is balanced. Since the polarities of the facing surface 413b and the facing surfaces 423b of the second magnet 423 are set, the mounting stage 353 can be mechanically held at the center position (origin position) in the moving area MA.

  Further, in the digital camera 103, the first magnet 413 as the first repulsive force generating portion has a cylindrical shape, and the second magnet 423 as the second repulsive force generating portion can be inserted into the first magnet 413 in a cylindrical shape. The opposing surface 413b of the first magnet 413 and the opposing surface of the second magnet 423 so that the repulsive force (repulsive force) of both is balanced when the second magnet 423 is positioned at the center position of the first magnet 413. Since the polarity with respect to 423b is set, a simple configuration in which the single first magnet 413 is provided on the mounting stage 353 and the single second magnet 423 is provided on the liner 333 can be achieved. In other words, it can be realized only by providing a pair of the first repulsive force generating part and the second repulsive force generating part.

  Further, in the digital camera 103, it is not necessary to press the mounting stage 353 against the end in the moving area MA in the mechanical holding state, so that the mounting stage 353 can be moved with respect to the base plate 34. Such a load can be further reduced.

  In the digital camera 103, when the photographic optical system 12 is in the retracted state, the mounting stage 353 is moved to the center position (origin position) in the moving area MA without causing power consumption regardless of the position of the mounting stage 353 in the moving area MA. ) And can be mechanically held at the center position (origin position). Here, in the electrical holding, since the mounting stage 353 is basically set to the origin position, the transition from the mechanical holding to the electrical holding can be made smoother.

  In the digital camera 103, when the photographing optical system 12 (liner 333) is set in the photographing standby state (see step S2 in FIG. 11), both the first magnets 413 and both the second magnets 423 are in the released state in the course of the operation. That is, before the mechanical holding is released, an operation of setting the mounting stage 353 to the origin position by electrical holding is executed (see step S3). It is possible to prevent a state in which both the holding and the releasing are generated, and it is possible to stabilize the imaging element 22 (the mounting stage 353) by electrical holding when the imaging standby state is set. This is based on position information from the position detection element 25 (see FIG. 2) so that the camera shake correction mechanism 30 appropriately moves to the origin position by using the attractive repulsion force due to the magnetic force in the electrically held state. Although the servo control is performed, since the position of the mounting stage 353 in the mechanical holding is the origin position by the electric holding, the movement amount of the mounting stage 353 accompanying the shift from the mechanical holding to the electric holding is extremely small. (Theoretically does not move).

  In the digital camera 103, since the position of the mounting stage 353 in the mechanical holding is the origin position by the electric holding, when the digital camera 10 (shooting optical system 12) is in the shooting standby state, the camera shake immediately occurs. Appropriate camera shake correction by the correction mechanism 30 can be executed.

  In the digital camera 103, the position of the mounting stage 353 in the mechanical holding and the origin position in the electric holding are set so that the center of the image sensor 22 is positioned on the optical axis. When the optical system 12) is placed in a shooting standby state, it is possible to immediately perform appropriate camera shake correction by the camera shake correction mechanism 30 and to prevent image deterioration.

  In the digital camera 103, since the position of the mounting stage 353 in the mechanical holding and the origin position in the electric holding coincide with the center position in the movement area MA, the digital camera 103 (the shooting optical system 12) is in shooting standby. When the state is set, the camera shake correction mechanism 30 can immediately execute the camera shake correction, and the camera shake correction can be executed for the camera shake in any direction along the XY plane. It is possible to prevent image deterioration.

  Therefore, in the digital camera 103 according to the third embodiment, it is possible to prevent generation of a pressing force on the photographing optical system 12 and the image sensor 22 while suppressing power consumption.

  In the third embodiment, the first magnet 413 is formed by the four magnets 413A, 413B, 413C, and 413D. However, the second magnet 423 is relatively guided to the center position of the first magnet 413. Thus, in order to apply a repulsive force (repulsive force) to the second magnet 423, the opposing surface 413 b that is the inner peripheral surface of the first magnet 413 is circumferentially centered about the axis of the first magnet 413. It suffices if the magnetic poles adjacent to each other are different from each other, and the present invention is not limited to the third embodiment.

  In the third embodiment, the second magnet 423 is formed by the two magnets 423A and 423B. However, the center position of the first magnet 413 is relatively aligned with the center position of the second magnet 423. In order to apply a repulsive force (repulsive force) to the first magnet 413, the magnetic poles at the portions of the facing surface 423b of the second magnet 423 are set according to the magnetic poles of the facing surface 413b of the first magnet 413. As long as it is, it is not limited to the above-described third embodiment.

  In each of the above-described embodiments, the digital camera 10 as an example of the imaging apparatus according to the present invention has been described. However, an imaging element that acquires a subject image by the imaging optical system is moved in a plane perpendicular to the imaging optical axis. And a storage stage in which at least a part of the plurality of optical members of the photographic optical system is retracted to store the optical members, and the optical elements from the storage state. An imaging apparatus capable of shifting to a shooting standby state in which at least a part of a member has been moved to the subject side, wherein a plurality of optical member housing frames for housing the optical members, and driving the optical member housing frames And a first repulsive force generating portion provided in the mounting stage, and in the direction of the photographic optical axis in accordance with the transition between the storage state and the imaging standby state of each optical member storage frame. Moved One is provided with a second repulsive force generating section that generates a repulsive force with the first repulsive force generating section without contacting the first repulsive force generating section, and the first repulsive force generating section and the second repulsive force generating section are provided. The generator is opposed to each other so that a repulsive force acts in a direction perpendicular to the photographic optical axis when the optical member storage frames are moved by the storage frame driving means to enter a storage state, and the generation frame driving means Any imaging apparatus may be used as long as the optical member housing frames are moved to enter a photographing standby state and are separated from each other. The present invention is not limited to the above-described embodiments.

  In each of the above-described embodiments, magnetic poles are set in the first magnets 41, 412, and 413 as the first repulsive force generating units and the second magnets 42, 422, and 423 as the second repulsive force generating units, respectively. However, by applying a repulsive force (repulsive force) between the first repulsive force generating portion and the second repulsive force generating portion, the mounting stage 35 and the like can be mechanically held as in each embodiment. As long as it is, it is not limited to the above-described embodiments.

  Further, in each of the above-described embodiments, the first magnets 41, 412, and 413 formed from the magnetized material as the first repulsive force generating portion and the second repulsive force generating portion, and the second magnets 42 and 422 as the second repulsive force generating portion. 423 is used, but the first repulsive force generation unit and the second repulsive force generation unit generate repulsive force (repulsive force) between each other without receiving power supply (no current is applied). However, the present invention is not limited to the above-described embodiments.

  In each of the above-described embodiments, the second repulsive force generation unit is provided in the liner 33. However, the second repulsive force generation unit is provided between the storage state and the photographing standby state in each optical member storage frame of the photographing optical system 12. It is only necessary to be provided in the optical member housing frame that is moved in the photographic optical axis direction by shifting, and is not limited to the above-described embodiments.

  In each of the above-described embodiments, when the lens barrel 13 (liner 33) is set in the photographing standby state in step S2, both the first magnet 41 and the second magnet 42 are released in the course of the operation, that is, the machine. Before the target holding is released, the operation of setting the mounting stage 35 in step S3 to the origin position by the electric holding is executed, but between the storage state of the photographing optical system 12 and the photographing standby state. Thus, since the first repulsive force generator and the second repulsive force generator are prevented from interfering with each other regardless of the transition, step S3 may be executed after step S2.

  In each of the above-described embodiments, when the lens barrel 13 is set to the retracted position in step S12, a distance in which repulsive force (repulsive force) acts between the second magnets 42 and the first magnets 41 in the course of the operation. Then, the electrical holding of the mounting stage 35 in step S13 is stopped, but the first repulsive force generating unit and the first repulsive unit are not related to the transition between the storage state of the photographing optical system 12 and the photographing standby state. Since interference with the 2 repulsive force generation unit is prevented, step S13 may be executed after step S12, or step S12 may be executed after step S13.

  In each of the above-described embodiments, the digital camera 10 is mechanically mounted with the mounting stage 35 or the like that holds the image sensor 22. However, a PDA (personal data assistant) or a mobile phone incorporating a camera function is mounted. It may be mounted on a portable information terminal device such as the above and other electronic devices, and is not limited to the above-described embodiments.

  As mentioned above, although the imaging device of the present invention has been described based on each embodiment, the specific configuration is not limited to each embodiment, and design changes, additions, and the like can be made without departing from the gist of the present invention. Permissible.

DESCRIPTION OF SYMBOLS 10, 102, 103 Digital camera (as an imaging device) 12 Imaging optical system 22 Imaging element 23 Lens barrel drive unit 32 (as a housing frame driving means) Rotating cylinder 33, 333 (As an optical member housing frame) Liner 35 (as member housing frame) 35, 353 mounting stage 41, 412, 413 first magnet (as first repulsive force generator) 42, 422, 423 second magnet (as second repulsive force generator)

JP 2010-8658 A

Claims (6)

A mounting stage that is movable along a plane perpendicular to the imaging optical axis to move an imaging device that acquires a subject image by the imaging optical system, and at least one of the plurality of optical members of the imaging optical system; An imaging apparatus capable of transitioning between a storage state in which the optical member is retracted by retracting a part and a photographing standby state in which at least a part of each optical member is moved from the storage state to the subject side,
A plurality of optical member housing frames that house the optical members, and housing frame driving means for driving the optical member housing frames,
The placement stage is provided with a first repulsive force generation unit,
One of the optical member housing frames that is moved in the direction of the photographic optical axis in accordance with the transition between the housed state and the photographing standby state includes the first repulsive force generating unit without contacting the first repulsive force generating unit. A second repulsive force generating part for generating repulsive force between
The first repulsive force generating unit and the second repulsive force generating unit cause repulsive force to act on each other in a direction perpendicular to the photographic optical axis when the optical member storage frames are moved to the storage state by the storage frame driving unit. An image pickup apparatus, wherein each of the optical member housing frames is moved by the housing frame driving means and separated from each other when the photographing standby state is established.   The imaging apparatus according to claim 1, wherein the first repulsive force generating unit and the second repulsive force generating unit are formed of a magnetized material disposed so that equal magnetic poles face each other.   The first repulsive force generating section is provided in each of two directions orthogonal to each other with the photographing optical axis as an intersection in a plane perpendicular to the photographing optical axis. The imaging device according to claim 1 or 2.   The mounting stage is characterized in that at least three first repulsive force generating portions are provided so as to surround the mounting stage around the imaging optical axis in a plane orthogonal to the imaging optical axis. The imaging device according to claim 1 or 2. The first repulsive force generating portion is a magnetized material that has a cylindrical shape having an axis along the photographing optical axis direction, and has different magnetic poles adjacent to each other in the circumferential direction around the axis,
The imaging apparatus according to claim 1, wherein the second repulsive force generation unit is a long magnetized material that can be inserted into an inner space of the first repulsive force generation unit.   An electronic apparatus comprising the imaging device according to any one of claims 1 to 5.