JP4810216B2 - Stage device lock mechanism - Google Patents

Description

  The present invention relates to a locking mechanism for a stage device that locks a stage plate in a non-operating state when the stage plate that can freely move on a specific plane is in the non-operating state.

  As a prior art of the lock mechanism, for example, there is one described in Patent Document 1.

  This locking mechanism includes a cylindrical boss projecting from the rear surface of the stage plate, and a first contact member and a second contact member that are provided behind the stage plate and face each other across the boss. I have. Both the first contact member and the second contact member are linearly movable in a direction parallel to the stage plate.

When the stage plate enters a non-operating state in which camera shake correction is not performed, the first abutting member and the second abutting member move to a locked position where they approach each other. Then, since the substantially semicircular engagement recess formed on the opposing surfaces of the first contact member and the second contact member sandwiches the boss, the stage plate is locked by the first contact member and the second contact member. The
Japanese Patent No. 3431020

  However, since the lock mechanism has a complicated structure and a large number of parts, the manufacturing cost is increased.

  Furthermore, since a large lock mechanism is provided behind the stage device, the dimensions of the stage device, particularly the dimensions in the optical axis direction, are increased, and the camera is increased in size in the optical axis direction.

  Furthermore, when the lock mechanism of Patent Document 1 is applied to a hand shake correction device that can correct so-called rotational shake, another problem arises. In other words, the stage plate can be rotated in this type of camera shake correction apparatus. However, in Patent Document 1, since there is one boss, even if the boss is sandwiched between the first contact member and the second contact member, the rotation of the stage plate cannot be locked.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a stage device locking mechanism that is simple and inexpensive in structure, can minimize the increase in size of the stage device, and can regulate the rotation of the stage plate.

The locking mechanism of the stage apparatus of the present invention is fixed to one of a fixed support substrate, a stage plate supported so as to be relatively movable in a direction parallel to the fixed support substrate, and one of the opposing portions of the stage plate and the fixed support substrate. The magnetic force generating member, the magnetic member that is fixed to the other of the opposed portions, and that can adsorb the magnetic force generating member, and the stage plate, the magnetic force generating member and the magnetic material approach each other and act between them. Selectively move between a lock position where the stage plate is prevented from moving by an attractive force and an unlock position where the magnetic force generating member and the magnetic body are separated and no attractive force acts to prevent the movement between them. When the magnetic force generating member and the magnetic body provided on the side of the driving means and the fixed support substrate are attracted to each other, the magnetic force generating member and the magnetic body are in contact with those fixed to the stage plate ,Up Magnetic force generating member and said magnetic body is characterized by and a stopper to prevent the relative movement in a direction parallel to the plane of the suction surface of both.

It is preferable that the magnetic force generating member and the magnetic body have an attracting surface in surface contact with each other.
It is preferable that the lock position of the stage plate is located outside the range of the movement area during correction of the stage plate.

  When the magnetic force generation member and the magnetic body are attracted to each other on the fixed support substrate side, the magnetic force generation member and the magnetic body fixed to the stage plate are brought into contact with each other, thereby It is preferable to provide a stopper that prevents the magnetic body from relatively moving in a direction parallel to the two planar attracting surfaces.

  It is preferable to provide a restricting means for restricting the stage plate from moving in the direction opposite to the stopper when viewed from the magnetic force generating member when the stage plate is located at the lock position.

  The restriction means includes, for example, a movement range restriction pin protruding from one of the stage plate and the fixed support substrate, and a movement range restriction hole or a movement range restriction notch formed on the other side through which the movement range restriction pin is inserted. Can be realized.

  When the stage plate is located at the unlock position, it is preferable that the magnetic force generating member and the magnetic body are separated in the vertical direction and the horizontal direction. In this way, when the stage plate is located at the unlock position, the stage plate is not easily affected by the magnetic force of the magnetic force generating member.

  Of the magnetic force generating member and the magnetic body, one fixed to the stage plate may be adsorbed from above to one fixed to the fixed support substrate.

  The magnetic force generating member and the magnetic body may be attracted in the horizontal direction.

  A magnetic force generating device fixed to one of the stage plate and the fixed support substrate; and a driving coil that generates a driving force by receiving the magnetic force generated by the magnetic force generating device fixed to the other; Is practical.

  Since the lock mechanism of the present invention has a very simple structure using a magnetic force generating member and a magnetic body, it can be manufactured at low cost.

  Moreover, since the structure is simple, it is possible to reduce the size. Therefore, even if this lock mechanism is attached to the stage apparatus, it is possible to minimize the increase in size of the stage apparatus.

  Further, if the magnetic force generating member and the magnetic body have an attracting surface in surface contact with each other, the rotation of the rotatable stage plate can be locked.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In the following description, as indicated by arrows in FIGS. 1 to 3, the horizontal direction of the camera shake correction device 30 of the digital camera 20 is defined as the X direction, the vertical direction is defined as the Y direction, and the front and back direction is defined as the Z direction.

  First, the hand shake correction device (stage device) 30 to which the lock mechanism 100 according to the present invention is attached will be described.

  As shown in FIG. 1, an optical system including a plurality of lenses L1, L2, and L3 is disposed in the digital camera 20, and a hand shake correction device 30 is disposed behind the lens L3. .

  The hand shake correction device 30 has a structure shown in FIGS.

  As shown in FIG. 2 to FIG. 7, the hand shake correction device 30 includes a front fixed support substrate 31 that is a horizontal rectangle made of a magnetic material such as soft iron, and a front shape that is substantially the same as the front fixed support substrate 31. A rear fixed support substrate (fixed support substrate) 32 made of a magnetic material is provided. The four portions of the front fixed support substrate 31 and the rear fixed support substrate 32 are connected to each other by four columnar columns (moving range regulating pins) (regulating means) 36 extending in the front-rear direction. 31 and the rear fixed support substrate 32 are parallel to each other. A rectangular window hole 33 is formed in the center of the front fixed support substrate 31. The front fixed support substrate 31 is fixed to the inner surface of the camera body of the digital camera 20 by three fixing screws (not shown).

  Supporting protrusions 38 having a prismatic shape are projected from four positions on the rear surface of the front fixed support substrate 31. The front half of a metal ball 39 is rotatably supported in a hemispherical recess (not shown) provided in the rear end surface of each support projection 38. Four support protrusions 40 protrude from the rear fixed support substrate 32 at positions facing the respective support protrusions 38, and are hemispherical recessed on the front end face of each support protrusion 40. The rear part of the metal ball 41 is rotatably supported by a recess (not shown).

  X magnets MX in which S and N poles are arranged in the X direction are fixed to the left and right ends of the rear surface of the front fixed support substrate 31, respectively. These left and right X magnets MX are arranged in the X direction, and the positions in the Y direction coincide with each other. Then, when the front fixed support substrate 31 and the rear fixed support substrate 32 pass the magnetic flux of the X magnet MX, an X magnetic circuit is formed between the left and right X magnets MX and the facing portion of the rear fixed support substrate 32. Is formed. That is, the front fixed support substrate 31 and the rear fixed support substrate 32 function as a yoke.

  On the other hand, a Y magnet MY in which the S pole and the N pole are arranged in the Y direction is fixed to the lower end portion of the rear surface of the front fixed support substrate 31. Then, the front fixed support substrate 31 and the rear fixed support substrate 32 pass the magnetic flux of the Y magnet MY, so that a Y magnetic circuit is formed between the opposing portions of the Y magnet MY and the rear fixed support substrate 32. ing. That is, the front fixed support substrate 31 and the rear fixed support substrate 32 function as a yoke.

  A reinforcing plate (stage plate) 61 having the same front shape as the electric substrate 60 is fixed to the rear surface of the flat electric substrate (stage plate) 60, and the electric substrate 60 and the reinforcing plate 61 are integrated. As shown in FIGS. 3 and 6, four balls 39 are rotatably contacted at four positions on the front surface of the electric board 60, and four balls 41 are disposed at four positions on the rear surface of the reinforcing plate 61. It is in contact with rotation. That is, the electric board 60 and the reinforcing plate 61 are sandwiched by the four balls 39 and the four balls 41 from the front and rear directions, and are both orthogonal to the optical axis O of the lenses L1 to L3 (the front fixed support board 31 and the rear board 31). And the side fixed support substrate 32).

  Accordingly, the electric board 60 and the reinforcing plate 61 can not only linearly move in the X and Y directions relative to the front fixed support board 31 and the rear fixed support board 32 from the initial position shown in FIG. And can move on an XY plane (perpendicular to the optical axis O) parallel to the Y direction. Furthermore, square movement range restricting holes (restricting means) 63 are formed at four locations of the electric substrate 60 and the reinforcing plate 61, and the corresponding struts 36 pass through the respective movement range restricting holes 63. The support column 36 and the movement range restriction hole 63 constitute a movement range restriction means, and the electric substrate 60 and the reinforcing plate 61 are connected to the front fixed support substrate 31 and the rear fixed support substrate 32. Relative movement is possible within the range of 63.

  A CCD (imaging device) 65 is fixed to the front central portion of the electric substrate 60. As shown in FIG. 7, the CCD 65 has a rectangular shape when viewed from the front, and in FIG. 7 (when the electric board 60 is in the initial position), a pair of upper and lower X direction side edges 65X parallel to the X direction, A pair of left and right sides 65Y parallel to the Y direction (when the electric board 60 is in the initial position). A CCD holder 67 surrounding the CCD 65 is fixed to the front surface of the electric substrate 60 in an airtight state. As shown in FIG. 5, a window hole 68 is formed in the front wall of the CCD holder 67. An optical low-pass filter 69 is fitted and fixed between the front wall of the CCD holder 67 and the CCD 65, and an airtight state is maintained between the optical low-pass filter 69 and the front wall of the CCD holder 67. The imaging surface 66 of the CCD 65 always faces the optical low-pass filter 69 and the window hole 68 in the front-rear direction. The imaging surface 66 of the CCD 65 is an imaging surface on which an image transmitted through the lenses L1 to L3 and the optical low-pass filter 69 is formed. Further, when the electric substrate 60 is at the initial position (in the state shown in FIG. 7), the center of the imaging surface 66 of the CCD 65 is positioned on the optical axis O.

  Three tongue pieces 71, a tongue piece 72, and a tongue piece 73 project from the left and right two places and the lower end portion of the electric substrate 60.

  As shown in FIG. 7, the tongue piece 71 and the tongue piece 72 are positioned corresponding to the left and right X magnetic circuits, respectively (the left and right X magnets MX are opposed to each other in the front-rear direction). The X-direction drive coil CX having the same specifications is fixed to the front surfaces of the tongue piece 71 and the tongue piece 72. The X-direction driving coil CX is a coil parallel to the XY plane in which the coil wire is wound in a spiral shape more than 100 times (which is wound in the direction parallel to the electric board 60 and in the thickness direction of the electric board 60). Yes, the left and right X-direction drive coils CX are aligned in a direction parallel to the X-direction side 65X (aligned in the X direction in FIG. 7). In other words, the positions of the left and right X-direction drive coils CX in the direction parallel to the Y-direction side 65Y (the positions in the Y-direction in FIG. 7) coincide.

  The X direction drive coil CX, the front fixed support substrate 31, the rear fixed support substrate 32, and the X magnet MX constitute an X direction drive means.

  The tongue piece 73 is located at a position facing the Y magnetic circuit in the front-rear direction.

  A Y-direction drive coil CYA and a Y-direction drive coil CYB having the same specifications are fixed to the front surface of the tongue piece 73. Both the Y-direction driving coil CYA and the Y-direction driving coil CYB have coil wires wound in a spiral shape more than 100 times (in the direction parallel to the electric substrate 60 and in the thickness direction of the electric substrate 60). ) The coils are parallel to the XY plane, and the Y-direction driving coil CYA and the Y-direction driving coil CYB are arranged along the lower X-direction side 65X (in FIG. 3, they are arranged in the X direction). . In other words, the Y-direction driving coil CYA and the Y-direction driving coil CYB have the same position in the direction parallel to the Y-direction side 65Y (Y-direction position in FIG. 7).

  The Y direction driving coil CYA and the Y direction driving coil CYB, the front fixed support substrate 31, the rear fixed support substrate 32, and the Y magnet MY constitute a Y direction drive means.

  The X-direction driving coil CX, the Y-direction driving coil CYA, and the Y-direction driving coil CYB are electrically connected to a control unit configured by a CPU or the like built in the camera.

  The camera shake correction apparatus 30 having the above configuration performs a camera shake correction operation by causing a current to flow from the control unit to the X direction driving coil CX, the Y direction driving coil CYA, and the Y direction driving coil CYB.

  That is, when a current is passed through the X direction driving coil CX, a driving force in the direction of the arrow FX1 or FX2 in FIGS. 3 and 7 is generated in the X direction driving coil CX. Further, when a current is passed through the Y-direction driving coils CYA and CYB, the Y-direction driving coils CYA and CYB generate a driving force in the direction of the arrow FY1 or FY2 in FIGS.

  As is well known, when the camera body vibrates in the X direction or Y direction due to camera shake, the movement distance (camera shake amount) of the camera body in the X direction and Y direction is detected, and the CCD 65 is detected as the camera shake direction relative to the camera body. If the linear movement is made in the opposite direction by the same distance as the amount of camera shake, the camera shake (image shake) of the CCD 65 is corrected. Therefore, if the current flows from the control means to the X direction driving coils CX and the Y direction driving coils CYA and CYB so that the CCD 65 performs such a linear movement, camera shake in the X direction and the Y direction of the CCD 65 will occur. It is corrected.

  Further, since the electric board 60 and the reinforcing plate 61 (CCD 65) can be rotated relative to the front side fixed support board 31 and the rear side fixed support board 32, the Y direction driving coil CYA and the Y direction driving coil CYB from the control means. When the directions of the currents flowing in the Y direction drive coils are reversed and Y direction driving coils CYA and Y direction driving coils CYB generate driving forces in opposite directions, the electric board 60 and the reinforcing plate 61 (CCD 65) rotate. Accordingly, when the camera body causes a so-called rotational shake, the Y direction driving coil CYA and the Y direction are supplied from the control means so that the electric board 60 and the reinforcing plate 61 (CCD 65) rotate in the direction opposite to the rotational shake direction. If a current is passed through the drive coil CYB, the rotational shake is corrected.

  FIG. 8 schematically shows the movement range of the center of the imaging surface 66 when performing the above-described camera shake correction operation (including the rotational shake correction operation). 60, the center of the reinforcing plate 61) moves within the correction moving area MA shown in FIG. When the electric board 60 and the reinforcing plate 61 are located at the initial positions in FIG. 7, the center of the imaging surface 66 is located at the point A that is the center point of the correction moving area MA.

  Next, the lock mechanism 100 to which the present invention is applied, which is mounted on the above-described hand movement correction device 30, will be described.

  The lock mechanism 100 includes the components described below.

  As shown in FIG. 2, a square hole 101 is formed at the center of the rear fixed support substrate 32. Furthermore, the left and right ends of the support plate 102 made of a non-magnetic material are fixed to the rear surface of the rear fixed support substrate 32 so as to straddle the square hole 101 in the left-right direction. As shown in FIGS. 2 and 5, the mounting portion 103, which is the central portion of the support plate 102, is located in front of the left and right end portions. A pair of left and right rectangular parallelepiped support members 105 are fixed to the front surface of the mounting portion 103 with fixing screws. Both the left and right support members 105 are formed of a magnetic material. On the upper surfaces of the left and right support members 105, prismatic yoke pieces (magnetic force generating members) 107 made of a magnetic material are integrally protruded as a pair of left and right (the yoke pieces 107 are a part of the support members 105. ). Further, a prismatic permanent magnet (magnetic force generating member) 106 is fixed to the upper surfaces of the left and right support members 105 in such a manner as to be sandwiched between the left and right yoke pieces 107. The upper surface (suction surface) of each yoke piece 107 is a plane parallel to the XZ plane. As shown in FIG. 3 and FIG. 7, the upper end of the permanent magnet 106 is positioned below the left and right yoke pieces 107, and the left and right yoke pieces 107 are magnetized by the magnetic lines of force emitted from the permanent magnet 106.

  Further, a pair of left and right stoppers 109 project from the upper surface of the attachment portion 103. As shown in FIG. 9, the stopper surface 110, which is the right side surface of the left and right stoppers 109, is a plane parallel to the YZ plane. The stopper surfaces 110 of the left and right stoppers 109 are aligned with the left side surface of the left yoke piece 107 fixed to the left and right support members 105 in a front view.

  On the other hand, an adsorption member 112 made of a magnetic material (for example, iron) is fixed to the rear surface of the reinforcing plate 61 with a fixing screw. At the lower end portion of the adsorption member 112, an adsorption piece (magnetic body) 113 is formed so as to form a part of the adsorption member 112 and whose lower surface (adsorption surface) is a plane parallel to the XZ plane.

  Next, the operation of the lock mechanism 100 configured as described above will be described.

  When the main power supply of the digital camera 20 is OFF, the center of the imaging surface 66 is located at a point C outside the correction moving area MA in FIG. 8, so that the hand shake correction device 30 is in the state shown in FIG. When the center of the imaging surface 66 is located at the point C, the lower surfaces of the left and right suction pieces 113 are attracted (surface contact) to the upper surfaces of the pair of left and right yoke pieces 107 as shown in FIG. The left side faces the stopper surfaces 110 of the left and right stoppers 109, respectively. The position of the electric board 60 and the reinforcing plate 61 at this time is the lock position (in contrast, the electric board 60 and the reinforcing plate 61 when the center of the imaging surface 66 is located in any of the correction moving areas MA). Position is unlocked position).

  When the electric board 60 and the reinforcing plate 61 are moved to the lock position in this way, the left and right suction pieces 113 are attracted to the upper surfaces of the pair of left and right yoke pieces 107, respectively, so that the Y-direction drive coils CYA and Y are controlled from the control means. Unless an electric current is passed through the direction driving coil CYB, the electric board 60 and the reinforcing plate 61 cannot move in the Y direction. Further, when the electric board 60 and the reinforcing plate 61 are moved to the lock position, the left side surfaces of the left and right suction pieces 113 not only come into contact with the stopper surfaces 110 of the left and right stoppers 109, respectively, but as shown in FIG. Is in contact with the left side surface of the corresponding movement range restriction hole 63 (there is a gap between the support column 36 and the upper surface of the movement range restriction hole 63), so that the support column 36, the movement range restriction hole 63, and the stopper surface 110 Due to the action, the electric board 60 and the reinforcing plate 61 cannot be moved in the X direction. That is, the electric board 60 and the reinforcing plate 61 are locked so as not to move in all directions. Therefore, even if the digital camera 20 is vibrated, the electric board 60 and the reinforcing plate 61 do not move relative to the camera body.

  In this state, if the main power supply of the digital camera 20 is turned on and the camera shake correction switch SW is turned off, the current from the control means to the X direction driving coil CX, the Y direction driving coil CYA, and the Y direction driving coil CYB. 3 does not flow, the camera shake correction device 30 maintains the state of FIG.

  When the camera shake correction switch SW is turned on while the main power is on, current flows from the control means to the Y-direction drive coil CYA and the Y-direction drive coil CYB, and the suction force of the suction piece 113 and the yoke piece 107 is reduced. The electric substrate 60 and the reinforcing plate 61 are linearly moved upward by a force that overcomes the force, and the center of the imaging surface 66 is moved to the point B in FIG. 8 (at this time, the attracting member 112 and the attracting piece 113, the permanent magnet 106, The positional relationship with the yoke piece 107 is as shown in FIG. Subsequently, current flows from the control means to the X direction driving coil CX, the Y direction driving coil CYA, and the Y direction driving coil CYB, and the electric board 60 and the reinforcing plate 61 linearly move diagonally upward to the point A. The board | substrate 60 and the reinforcement board 61 move to the initial position of FIG.

  Thus, when the electric board 60 and the reinforcing plate 61 are moved to the initial position of FIG. 7 and the left and right suction pieces 113 are separated upward from the left and right yoke pieces 107, the electric board 60 and the reinforcing plate 61 are moved to the movement range restricting holes. It is possible to move within a range where 63 does not contact the support column 36 (a range where the center of the imaging surface 66 is located within the correction moving area MA in FIG. 8). No matter where the center of the imaging surface 66 is located in the correction moving area MA, the left and right attracting pieces 113 are spaced upward from the left and right yoke pieces 107 and are hardly affected by the magnetic field lines of the left and right yoke pieces 107. The camera shake correction operation by the electric substrate 60 (reinforcing plate 61) and the CCD 65 is smoothly performed.

  In this state, when the camera shake correction switch SW is turned off or the main power supply of the digital camera 20 is turned off, the control means applies the X direction driving coil CX, the Y direction driving coil CYA, and the Y direction driving coil CYB. An electric current is applied, and the electric board 60 and the reinforcing plate 61 are moved until the center of the imaging surface 66 moves to point B in FIG. 8 (see FIG. 9). Further, current flows from the control means to the Y-direction drive coil CYA and the Y-direction drive coil CYB, and the electric board 60 and the reinforcing plate 61 linearly move downward from this position, so that the center of the imaging surface 66 moves during correction. Move to point C, which is outside the range of area MA. Accordingly, the hand shake correction device 30 is locked again.

  As described above, according to the present embodiment, the lock position is determined by the lock mechanism 100 including the support column 36, the movement range regulating hole 63, the permanent magnet 106, the yoke piece 107, and the adsorption member 112 (adsorption piece 113). The electric board 60 and the reinforcing plate 61 can be reliably locked.

  Further, since the suction piece 113 that moves integrally with the electric board 60 and the reinforcing plate 61 is sucked to the upper side 107, the electric board 60 and the reinforcing board 61 are placed on the lower surface of the digital camera 20 in a state where the electric board 60 and the reinforcing plate 61 are located at the lock position. Even when an impact is applied (for example, when the lower surface of the digital camera 20 is placed on the top of a desk), the lock is not released. Further, if the electric board 60 and the reinforcing plate 61 are locked at the lock position, the left side surface of the left and right suction pieces 113 is contacted with the stopper surface 110 of the left and right stoppers 109 even if a left and right impact is applied to the digital camera 20. Since the respective abutments 36 abut on the left side surfaces of the corresponding movement range restricting holes 63, the electric substrate 60 and the reinforcing plate 61 are not unlocked.

  Furthermore, by setting the lock position to the lower right corner (by placing the point C in FIG. 8 to the lower right of the point A), the following effects can be obtained.

  As a first effect, by setting the lock position below the initial position, it is possible to perform the hand shake correction operation when the shutter button is pressed extremely smoothly. That is, when a downward camera shake occurs in the digital camera 20 by pressing the shutter button, the electric board 60 and the reinforcing plate 61 move upward to cancel the camera shake. At this time, the electric board 60 and the reinforcing board 61 are moved. The attracting piece 113 that moves integrally with the permanent magnet 106 moves further upward from the permanent magnet 106. Therefore, the upward movement (hand shake correction operation) of the electric board 60 and the reinforcing plate 61 is hardly affected by the magnetic force of the permanent magnet 106, and the hand shake correction operation when the shutter button is pressed is performed very smoothly.

  Further, the following effect is obtained as the second effect. That is, since the lock position is set to the lower right rather than directly below the initial position, when the electric board 60 and the reinforcing plate 61 are positioned at the unlock position as compared with the case where the lock position is set directly below, the suction piece 113 and the yoke piece 107 ( The distance of the permanent magnet 106) is further increased. As a result, the attracting piece 113 (the electric board 60 and the reinforcing plate 61) is less affected by the magnetic force of the permanent magnet 106 during the hand shake correction operation. Such an effect can be similarly obtained when the lock position is set at the lower left corner (when the point C in FIG. 8 is positioned at the lower left of the point A).

  Furthermore, since the lock mechanism 100 has a small number of parts and a simple structure, the manufacturing cost can be kept low.

  In addition, the support member 105, the permanent magnet 106, the yoke piece 107, and the attracting member 112 are small in size, and all the components of the lock mechanism 100 including the support column 36 and the movement range regulating hole 63 are fixed to the front fixed support substrate 31 and the rear fixed. Since it is located between the support substrates 32, the hand movement correction device 30 itself is not enlarged in the optical axis O direction or other directions by the lock mechanism 100.

  Further, since the electric board 60 and the reinforcing plate 61 are locked when the center of the imaging surface 66 reaches the point C deviated from the correction moving area MA, if the structure of this embodiment is adopted, the camera shake correction operation is in progress. In addition, there is an advantage that a retracting mechanism for retracting the yoke piece 107 (support member 105, permanent magnet 106) or the attracting member 112 to a position where they do not contact each other is unnecessary.

  Further, even if the suction piece 113 and the yoke piece 107 are sucked, the force in the optical axis O direction does not reach the electric substrate 60 and the reinforcing plate 61 from the suction piece 113 and the yoke piece 107, so that the CCD 65 moves in the optical axis O direction when locked. Therefore, the focus of the CCD 65 is not affected.

  Next, a second embodiment of the locking mechanism of the present invention will be described mainly with reference to FIGS. The same members as those in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.

  As shown in FIGS. 10 and 11, the stopper 109 of the locking mechanism 100 of the present embodiment is located on the left side of the stopper 109 of the first embodiment. Therefore, the left side surface of the left yoke piece 107 and the position of the stopper surface 110 in the X direction do not match.

  In the first embodiment, the center of the imaging surface 66 moves from point A → point B → point C when the camera shake correction switch SW or the main power supply is turned off while the camera shake correction switch SW is ON. When the center of the imaging surface 66 moves to the point C, the suction piece 113 and the yoke piece 107 are sucked in the state shown in FIG. As shown in FIG. 10, since a gap is formed between the left side surface of the suction piece 113 and the stopper surface 110 at this time, the electric board 60 and the reinforcing plate 61 can move from the lock position to the left side by this gap. is there. However, since the permanent magnet 106 of this embodiment generates a stronger magnetic force than the permanent magnet 106 of the first embodiment, the electric board 60 and the reinforcing plate 61 actually move from the lock position to the left and right even when the digital camera 20 is vibrated. Never move.

  In such a locked state, when the camera shake correction switch SW is turned on while the main power supply of the digital camera 20 is on, a current flows from the control means to the X direction driving coil CX, and the center of the imaging surface 66 is shown in FIG. The electric board 60 and the reinforcing plate 61 slide to the left until it moves to the point D, and the camera shake correction device 30 is in the state shown in FIG. Subsequently, current flows from the control means to the Y-direction driving coil CYA and the Y-direction driving coil CYB, and the electric board 60 and the reinforcing plate 61 move upward. At this time (when the center of the imaging surface 66 is at point D), as shown in FIG. 11, the contact area between the suction piece 113 and the yoke piece 107 is smaller than that in FIG. 10 (only the left yoke piece 107 is sucked). Therefore, the suction force between the suction piece 113 and the yoke piece 107 is smaller than that in FIG. Therefore, the left and right suction pieces 113 can be moved by the upward driving force of the Y direction driving coil CYA and the Y direction driving coil CYB without passing a large current through the Y direction driving coil CYA and the Y direction driving coil CYB. The electric board 60 and the reinforcing plate 61 are returned to the initial positions shown in FIG.

  When this embodiment described above is adopted, the same effect as that of the first embodiment can be obtained.

  Further, even if the locking force is increased by using the permanent magnet 106 having a larger magnetic force than that of the first embodiment, the X-direction driving coil CX, the Y-direction driving coil CYA, and the Y-direction driving coil CYB when unlocked. There is an advantage that it is not necessary to increase the current flowing through the.

  As mentioned above, although this invention was demonstrated based on said each embodiment, this invention is not limited to these embodiment, It can implement by giving various deformation | transformation.

  For example, as a driving means for moving the electric board 60 and the reinforcing plate 61, the front fixed support board 31, the rear fixed support board 32, the X magnet MX, the Y magnet MY, the X direction driving coil CX, the Y direction Although the driving coil CYA and the Y-direction driving coil CYB are used, other driving means such as a motor may be used. Further, the X magnet MX and the Y magnet MY are fixed to the electric board 60 or the reinforcing plate 61, and the X direction driving coil CX, the Y direction driving coil CYA, and the Y direction driving coil CYB are connected to the front fixed support board 31 or You may fix to the back side fixed support substrate 32. FIG.

  Further, the attracting member 112 may be fixed to the front surface of the electric substrate 60, and the support member 105, the permanent magnet 106, and the yoke piece 107 may be provided on the rear surface of the front fixed support substrate 31. Further, the support member 105, the permanent magnet 106 and the yoke piece 107 may be provided on the electric substrate 60 or the reinforcing plate 61, and the attracting member 112 may be provided on the rear fixed support substrate 32 or the front fixed support substrate 31. Further, a permanent magnet may be used instead of the attracting member 112. Furthermore, electromagnets can be used instead of the permanent magnets.

  Further, as shown in FIG. 12, the direction of the permanent magnet 106, the yoke piece 107 and the attracting piece 113 may be rotated by 90 ° so that the yoke piece 107 and the attracting piece 113 are attracted in the X direction. If the yoke piece 107 and the suction piece 113 are sucked at the position where the center of the imaging surface 66 is located outside the range of the correction moving area MA in such a configuration, the suction force between the yoke piece 107 and the suction piece 113 will be described. Thus, the electric board 60 and the reinforcing plate 61 do not move in the left-right direction (horizontal direction) from the lock position.

  Further, instead of the movement range restriction hole 63, a movement range restriction notch (not shown) is formed at the peripheral edge of the electric board 60 and the reinforcing plate 61, and the column 36 is positioned so as to be relatively movable in the movement range restriction notch. Also good.

  Further, a hole (or notch) corresponding to the movement range restriction hole 63 is formed in the front fixed support substrate 31 or the rear fixed support substrate 32, and a pin corresponding to the support column 36 is protruded from the electric substrate 60 or the reinforcing plate 61. May be.

  Further, it goes without saying that an image pickup device other than the CCD 65, for example, a CMOS image sensor can be used.

  Furthermore, in the above embodiment, the lock mechanism of the present invention is applied to the hand shake correction device 30 in which the electric board 60 and the reinforcing plate 61 can rotate. However, the electric board 60 and the reinforcing plate 61 move linearly only in the X direction and the Y direction. It can be applied to a conventionally known camera shake correction apparatus, or a stage apparatus (apparatus in which a specific member can linearly move or rotate in the X direction or the Y direction) that has a different use from the camera shake correction apparatus. Of course it is possible.

1 is a longitudinal side view of a digital camera including a camera shake correction device according to a first embodiment of the present invention. It is a disassembled perspective view of a hand-shake correction apparatus. It is a rear view which abbreviate | omits a rear side fixed support substrate and shows the camera-shake correction apparatus in a locked state. It is a rear view of a front side fixed support substrate and its fixed component. It is sectional drawing which follows the VV arrow line of FIG. It is sectional drawing which follows the VI-VI arrow line of FIG. It is a rear view which abbreviate | omits a rear side fixed support substrate and shows the camera-shake correction apparatus in an unlocked state. It is a conceptual diagram which shows the movement area | region and movement position at the time of correction | amendment of the center of an imaging surface. It is a front view which shows a permanent magnet, a yoke piece, and an attracting member when the center of an imaging surface is located in the B point of FIG. It is the rear view which looked at the permanent magnet, the yoke piece, and the attraction | suction member from back in the locked state of 2nd Embodiment. Similarly, it is a rear view showing a state where the suction member slides to the left from the locked state and comes into contact with the stopper. It is a rear view of the permanent magnet and yoke piece and adsorption member of a modification.

Explanation of symbols

20 Digital camera (camera)
30 Hand shake correction device (stage device)
31 Front fixed support substrate (fixed support substrate) (drive means)
32 Rear side fixed support substrate (fixed support substrate) (drive means)
33 Window hole 36 Post (moving range regulating pin) (regulating means)
38 Protrusion for Support 39 Ball 40 Protrusion for Support 41 Ball 60 Electric Board (Stage Plate)
61 Reinforcement plate (stage plate)
63 Movement range regulation hole (regulation means)
65 CCD (imaging device)
66 Imaging surface 67 CCD holder 68 Window hole 69 Optical low-pass filter 71 72 73 Tongue piece 100 Lock mechanism 101 Square hole 102 Support plate (fixing member)
103 mounting portion 105 support member 106 permanent magnet (magnetic force generating member)
107 Yoke piece (magnetic force generating member)
109 Stopper 110 Stopper surface 112 Adsorption member 113 Adsorption piece (magnetic material)
CX X direction driving coil (driving means) (driving coil)
CYA CYB Y direction driving coil (driving means) (driving coil)
MA correction area MX X magnet (drive means) (magnetic force generator)
MY Y magnet (drive means) (magnetic force generator)
O Optical axis

Claims (9)

A fixed support substrate;
A stage plate supported so as to be relatively movable in a direction parallel to the fixed support substrate;
A magnetic force generating member fixed to one of the opposing portions of the stage plate and the fixed support substrate;
A magnetic body fixed to the other of the opposing portions and capable of adsorbing to the magnetic force generating member;
The stage plate is separated from the lock position where the magnetic force generating member and the magnetic body come close to each other and the movement of the stage plate is prevented by an attractive force acting between them, and the magnetic force generating member and the magnetic body are separated from each other. A driving means for selectively moving to an unlock position where an adsorption force that prevents movement between them is not acting;
When the magnetic force generating member and the magnetic body provided on the fixed support substrate side are attracted to each other, the magnetic force generating member and the magnetic body fixed to the stage plate are brought into contact with each other, thereby generating the magnetic force. A stopper that prevents the member and the magnetic body from moving relative to each other in a direction parallel to the planar attraction surface of the both;
A locking mechanism for a stage device, comprising: In the locking mechanism of the stage apparatus according to claim 1,
A locking mechanism for a stage apparatus, comprising a suction surface on which the magnetic force generating member and the magnetic body are in surface contact with each other. In the locking mechanism of the stage apparatus according to claim 1 or 2,
  The locking mechanism of the stage apparatus, wherein the locking position of the stage plate is located outside the range of the correction movement area of the stage plate. In the locking mechanism of the stage apparatus according to claim 3 ,
A locking mechanism for a stage apparatus, provided with restricting means for restricting movement of the stage plate in a direction opposite to the stopper when viewed from the magnetic force generating member when the stage plate is located at the lock position. In the locking mechanism of the stage device according to claim 4 ,
The regulation means
A movement range regulating pin protruding from one of the stage plate and the fixed support substrate;
A locking mechanism for a stage apparatus, comprising: a movement range restriction hole or a movement range restriction notch formed on the other side through which the movement range restriction pin is inserted. In the locking mechanism of the stage device according to any one of claims 1 to 5 ,
A locking mechanism for a stage apparatus in which the magnetic force generating member and the magnetic body are separated in the vertical direction and the horizontal direction when the stage plate is located in the unlock position. In the locking mechanism of the stage device according to any one of claims 1 to 6 ,
A stage mechanism locking mechanism in which a member fixed to the stage plate among the magnetic force generating member and the magnetic body is attracted from above to a member fixed to the fixed support substrate. In the locking mechanism of the stage device according to any one of claims 1 to 6 ,
A locking mechanism of a stage device in which the magnetic force generating member and the magnetic body are attracted in the horizontal direction. In the locking mechanism of the stage device according to any one of claims 1 to 8 ,
The driving means is
A magnetic force generator fixed to one of the stage plate and the fixed support substrate;
A driving coil that generates a driving force by receiving a magnetic force generated by the magnetic force generator fixed to the other;
A stage device locking mechanism comprising:

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