JP2005250284A - Stage device and camera shake correction unit using stage device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stage device whose structure is simple, manufacturing cost is low, and size perpendicular to an electric substrate can be made small, and to provide a camera shake correction unit using the stage device. <P>SOLUTION: The stage device comprises: a fixed support substrate and the electric substrate which are parallel to each other; a guide mechanism which guides the electric substrate so as to be movable in an X direction and a Y direction orthogonal to each other with respect to the fixed support substrate within a plane to which the electric substrate belongs; and an electromagnetic system X-direction moving device and an electromagnetic system Y-direction moving device which relatively move the electric substrate in the X direction and the Y direction with respect to the fixed support substrate. The X-direction moving device and the Y-direction moving device include: a drive coil in which a current flows; and a magnetic force generating device which applies a magnetic force to the drive coil and relatively linearly moves the drive coil in its driving direction. In such a stage device, the drive coil is a flat plane coil in which windings are located within a flat plane parallel to the electric substrate. The drive coil is provided on one of the fixed support substrate and the electric substrate, whereas the magnetic force generating device is provided on the other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a stage apparatus that linearly moves an electric substrate in two orthogonal directions, and a camera shake correction apparatus for a camera that uses the stage apparatus.

  For example, Patent Document 1 discloses a conventional stage apparatus that can linearly move an electric substrate in two directions orthogonal to each other in one plane.

  This stage device is used as a camera shake correction device for a camera (digital camera), and an electric board on which an image sensor is mounted and two directions in which the electric board is parallel to the electric board and perpendicular to each other (the two directions are X directions). , Referred to as the Y direction), and a driving mechanism for applying linear driving forces in the X direction and the Y direction to the electric board.

The guide mechanism is supported by an X-direction guide mechanism that is movable in the X direction with respect to a fixed member fixed to the camera body, and is supported by the X-direction guide mechanism so as to be relatively movable in the Y direction, and supports the electric board. It consists of a Y-direction guide mechanism.
In addition, the drive device is provided between the X-direction guide mechanism and the Y-direction guide mechanism, and is provided between the fixing member and the X-direction guide mechanism, and applies an X-direction drive force to the X-direction guide mechanism. And a Y-direction drive device that applies a Y-direction drive force to the Y-direction guide mechanism.

  These X-direction drive device and Y-direction drive device are electromagnetic drive devices. Specifically, the X-direction drive device includes an X-direction magnetic force generator fixed on the fixed member side, and a flat X-direction drive coil provided on the X-direction guide mechanism side and facing the optical axis direction. It has. When a current is passed through the X direction driving coil, the X direction driving force acts on the X direction driving coil by the current and the magnetic force generated by the X direction magnetic force generator, and the X direction guide mechanism moves in the X direction. To do. The direction of the driving force is reversed by changing the direction of the current flowing through the X-direction driving coil.

  The Y direction drive device also includes a Y direction magnetic force generator provided on the X direction guide mechanism side, and a planar Y direction drive coil provided on the Y direction guide mechanism side and facing the optical axis direction. ing. When a current is passed through the Y-direction drive coil, the Y-direction drive force acts on the Y-direction drive coil by the current and the magnetic force generated by the Y-direction magnetic force generator, and the Y-direction guide mechanism becomes the X-direction guide mechanism. Move in the Y direction. This driving force is also reversed in direction by changing the direction of the current flowing in the Y-direction driving coil.

  Further, the camera shake correction device includes a sensor that detects camera shake generated in the camera, and a control circuit that supplies a predetermined current to the coils of the X direction drive device and the Y direction drive device in accordance with the amount of camera shake detected by the sensor. I have.

In the camera shake correction apparatus having such a configuration, when camera shake occurs, the sensor detects this, and depending on the detected direction and amount of camera shake, the X direction drive coil and the Y direction drive coil are Current is passed while adjusting the direction and size. When current flows through both coils, the X-direction guide mechanism and the Y-direction guide mechanism reciprocate linearly in the X direction and Y direction, respectively, to correct the camera shake.
JP-A-6-46314

  However, in this camera shake correction device, the X-direction drive coil and the Y-direction drive coil are provided on different members, and the X-direction magnetic force generator and the Y-direction magnetic force generator are provided on different members. The structure was complicated and the manufacturing cost was high.

  Furthermore, the X direction driving coil and the Y direction driving coil are oriented in a direction parallel to the optical axis. For this reason, if each coil is lengthened in the optical axis direction in order to obtain a large driving force, the X-direction driving device and the Y-direction driving device are enlarged in the optical axis direction. As a result, the digital camera is moved in the optical axis direction. It will increase in size.

  An object of the present invention is to provide a stage device that has a simple structure, is low in manufacturing cost, and can be reduced in size in a direction perpendicular to an electric substrate, and a camera shake correction device for a camera using the stage device.

  The stage apparatus of the present invention includes a fixed support substrate and an electric substrate that are parallel to each other, and the electric substrate in the X direction and the Y direction that are orthogonal to each other in a plane to which the electric substrate belongs with respect to the fixed support substrate. A guide mechanism that movably guides, and an electromagnetic X-direction drive device and a Y-direction drive device that move the electric substrate relative to the fixed support substrate in the X direction and the Y direction. The X direction driving device and the Y direction driving device each have a driving coil through which a current flows, and a magnetic force generating device that applies a magnetic force to the driving coil to linearly move the driving coil in the respective driving directions. And the driving coil is a planar coil positioned in a plane in which a winding is parallel to the electrical substrate, and one of the fixed support substrate and the electrical substrate is The serial drive coil provided is characterized in that a said magnetic force generating device to the other. Thus, when the X direction driving coil and the Y direction driving coil are both provided on one of the fixed support substrate and the electric substrate, and the X direction magnetic force generating device and the Y direction magnetic force generating device are both provided on the other side, the structure In addition, the dimension of the stage device in the direction perpendicular to the electric substrate can be reduced.

  If the driving coil is provided on the electric board, the driving coil can be connected to the conductor of the electric board, so that it is not necessary to provide a new wiring for supplying power to the driving coil.

  It is practical to print the driving coil on the electric board.

  When the driving coil is provided on the electric board side, it is practical to form a protruding tongue piece on the electric board and mount it on the protruding tongue piece.

  It is practical that the magnetic force generator includes a magnet and a U-shaped yoke that surrounds the coil and that is magnetized by the magnet and forms a line of magnetic force with the magnet.

  In consideration of the transmission efficiency of the driving force from the X-direction driving device and the Y-direction driving device to the electric board, the driving coils of the X-direction driving apparatus and the Y-direction driving apparatus are provided on the electric board, When viewed from an orthogonal direction, an X-direction straight line passing through the center of the driving coil of the X-direction driving device in the X direction and a Y direction passing through the center of the driving coil of the Y-direction driving device in the Y direction It is preferable that the straight line overlap with the center of gravity of the electric substrate or the vicinity of the center of gravity.

  This stage device can be used as a camera shake correction device. Specifically, a camera incorporating the stage device, an image sensor having an imaging surface on the front surface that moves integrally with the electric board, a vibration detection sensor that detects vibration of the camera, and the vibration Based on the vibration information detected by the detection sensor, the above-described driving coil is provided with a control unit that supplies current so as to correct the camera shake, thereby obtaining a camera shake correction device.

  Further, a camera shake correction device includes a camera incorporating the stage device, a correction lens that moves integrally with the electric board, and a vibration detection sensor that detects vibration of the camera. Further, it is obtained by providing a control means for supplying a current to the drive coil so as to correct the camera shake based on the vibration information detected by the vibration detection sensor.

  According to the present invention, it is possible to obtain a stage apparatus having a simple structure and a low manufacturing cost, and a camera shake correction apparatus using the stage apparatus. Furthermore, since the driving coil is a planar coil parallel to the electric substrate, the dimension in the direction orthogonal to the electric substrate of the stage device and the camera shake correction device of the camera can be reduced.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, an optical system including a plurality of lenses L1, L2, and L3 is disposed in a digital camera (camera) 1, and a CCD (imaging device) 3 is disposed behind the lens L3. It is installed. The position of the imaging surface 3a of the CCD 3 orthogonal to the optical axis O of the camera optical system coincides with the imaging position of the camera optical system, and is fixed to the camera shake correction device 5 built in the digital camera 1. ing.

As shown in FIGS. 2 to 13, the camera shake correction device 5 has the following structure.
As shown in FIGS. 2, 6, and 9, the fixed support substrate 10 having a square shape when viewed from the rear and having a square accommodation hole 10 a formed in the center thereof is a fixing means not shown. Thus, the body of the digital camera 1 is fixed so as to be orthogonal to the optical axis O and to be positioned at the center of the accommodation hole 10a. Two Y-direction guide portions 11 having the same shape made of an elastic material such as a synthetic resin are arranged in the Y direction (vertical direction) indicated by an arrow Y in FIG. The Y direction guide groove 12 linearly penetrates both Y direction guide portions 11 in the Y direction. As shown in FIG. 7, the Y-direction guide groove 12 includes a guide portion 12a having a circular cross-sectional view and an opening portion 12b that communicates the guide portion 12a with the outside. The guide parts 12a provided in the upper and lower Y-direction guide parts 11 are concentric with each other, and the opening width (L1) outside the opening part 12b is larger than the opening width (L2) of the communicating part with the guide part 12a.
On the right side of the rear surface of the fixed support substrate 10, two free end support portions 13 are juxtaposed in the Y direction. Both free end support portions 13 are respectively provided with Y-direction long holes 14 that penetrate the free end support portions 13 in the X direction (left-right direction) indicated by the arrow X in FIG. 2 and are long in the Y direction. Yes.

  As shown in FIGS. 2, 6, and 9, the Y-direction moving member 20 having an inverted U shape when viewed from the back is formed by bending a metal rod having a circular cross-sectional shape. The Y-direction moving member 20 includes a Y-direction rod-shaped portion 21 extending in the Y-direction and an X-direction rod-shaped portion extending from the upper and lower ends of the Y-direction rod-shaped portion 21 toward the right side in FIGS. 2, 6, and 9. Parts 22 and 23. The cross-sectional diameters of the X-direction rod-shaped portions 22 and 23 are substantially the same as the front-rear direction dimensions of the Y-direction long hole 14.

  The CCD 3 is fixed to the front surface of the base plate 30 that forms a square when viewed from the rear. As shown in FIG. 12, a hollow cover member 31 is fixed to the front surface of the base plate 30 so as to surround the CCD 3. Has been. The front surface of the cover member 31 is provided with a daylighting hole 31a having a square shape when viewed from the front (see FIG. 12), and when viewed from the front, the imaging surface 3a of the CCD 3 is completely exposed through the daylighting hole 31a. I have to. Further, a low-pass filter 32 made of a translucent material is disposed in the inner space of the cover member 31 so as to be in contact with the inner peripheral surface of the front portion of the cover member 31, and the imaging surface 3 a on the front surface of the CCD 3. Between the periphery and the low-pass filter 32, a front-viewing rectangular annular pressing member 33 that contacts the peripheral edge of the imaging surface 3a is provided.

  A pair of left and right X-direction guide portions 34 project from the upper end portion of the cover member 31, and a support portion 35 projects from the lower end portion. Both X-direction guide portions 34 are provided with X-direction guide holes 34 a penetrating the X-direction guide portions 34 in the X direction and having substantially the same cross-sectional shape as the X-direction rod-shaped portion 22. On the other hand, the support portion 35 is provided with a support groove 35a penetrating the support portion 35 in the X direction. As shown in FIG. 8, the lower end of the support groove 35 a is open, the Y-direction length is longer than the cross-sectional diameter of the X-direction rod-shaped portion 23, and the front-rear width is substantially the same as that of the X-direction rod-shaped portion 23. Are the same.

As shown in FIGS. 11 and 12, an electric substrate 36 is fixed to the rear surface of the base plate 30. A number of conductors (not shown) are formed on the electrical substrate 36, and the CCD 3 is electrically connected to the conductors. Two protruding tongue pieces 36a and 36b are formed on the electric board 36, and flat X-direction driving coils (for driving) parallel to the electric board 36 are respectively provided on the rear surfaces of the protruding tongue pieces 36a and 36b. A coil) CX and a Y-direction driving coil (driving coil) CY are formed by printing.
As shown in FIG. 13, the X-direction driving coil CX has a spiral shape in which each side forms a straight line, and includes a right side CX1, a left side CX2, an upper side CX3, and a lower side CX4.
As shown in FIG. 14, the Y-direction driving coil CY also has a spiral shape in which each side forms a straight line, and includes a right side CY1, a left side CY2, an upper side CY3, and a lower side CX4. The X-direction driving coil CX and the Y-direction driving coil CY are illustrated as being wound several times for convenience, but are actually wound several tens of times.
Both ends of the X-direction driving coil CX and the Y-direction driving coil CY are connected to the conducting wire of the electric board 36, respectively. Further, as shown in FIG. 13, when viewed from the rear, the X-direction straight line LX, which is a straight line in the X direction passing through the center of the X-direction driving coil CX, is an electric board 36, a base plate 30, a cover member 31, It overlaps with the gravity center G of the X-direction moving body composed of the low-pass filter 32, the pressing member 33, and the CCD 3. On the other hand, a Y-direction straight line LY, which is a Y-direction straight line passing through the center of the Y-direction driving coil CY, is a Y-direction moving body obtained by adding the Y-direction moving member 20 to the X-direction moving body in the non-operating state of FIG. And the center of gravity (slightly shifted from the center of gravity G).

U-shaped yokes YX and YY made of a magnetic material such as metal are fixed at two positions on the rear surface of the fixed support substrate 10, and magnets MX and MY are provided on the inner surfaces of the yokes YX and YY. Yes. The magnet MX of the yoke YX has N poles and S poles arranged in the X direction, and the magnet MY of the yoke YY has N poles and S poles arranged in the Y direction.
As shown in FIG. 12, the tip of the yoke YY faces the magnet MY, and a magnetic circuit is formed between them.
Although not shown, similarly, the tip of the yoke YX forms a magnetic circuit with the magnet MX.

  The left side of FIGS. 2, 6, 9 and 11 with the cover member 31 positioned in the receiving hole 10a and the protruding tongue pieces 36a and 36b positioned in the yokes YX and YY, respectively. The Y-direction moving member 20 is moved closer to the cover member 31, and the X-direction rod-shaped portion 22 is passed through the X-direction guide holes 34a of both X-direction guide portions 34 and the X-direction rod-shaped portion 23 is passed through the support groove 35a. Then, the electric board 36 can move relative to the Y-direction moving member 20 in the X direction.

  Then, as shown in FIG. 6, the Y-direction moving member 20 integrated with the base plate 30, the cover member 31, both the X-direction guide portions 34, the support portion 35, and the electric board 36 in this way is shown in FIG. It is moved linearly from the left side to the right side, the free ends of both X-direction rod-like portions 22, 23 are fitted into the Y-direction long holes 14 of both free-end support portions 13, and the Y-direction rod-like portion 21 is opened. It is made to fit in the part 12b. When the Y-direction rod-shaped portion 21 is fitted into the opening 12b, the cross-sectional diameter of the Y-direction rod-shaped portion 21 is narrower than the outer opening width (L1) of the opening 12b, but wider than the inner opening width (L2). The opening 12b is elastically deformed in the expanding direction. When the Y-direction bar-shaped portion 21 is further moved to the right side in FIG. 6, the Y-direction bar-shaped portion 21 is fitted with the guide portion 12a being prevented from coming off, and the opening 12b is elastically restored to the original shape. 11 and FIG. 12, the camera shake correction device 5 is completed.

  In this way, the Y-direction moving member 20 is moved to the Y-direction long hole 14 and the Y-direction guide groove 12 simply by linearly moving the Y-direction moving member 20 from the left side to the right side in FIGS. 2, 6, and 9. Easy to install. Further, the Y-direction moving member 20 is linearly moved from the right side to the left side in FIGS. 2, 6, and 9 with a force sufficient to elastically deform the opening 12 b, thereby guiding the Y-direction moving member 20 in the Y-direction. It can be easily removed from the groove 12 and the Y-direction long hole 14.

  As described above, since the cross-sectional diameter of the X-direction rod-shaped portions 22 and 23 and the longitudinal dimension of the Y-direction long hole 14 are the same, the rotation of the Y-direction moving member 20 around the Y-direction rod-shaped portion 21 is restricted. As a result, the central axis of the Y-direction moving member 20 is always located on the XY virtual plane P (see FIG. 4) parallel to the X direction and the Y direction. Further, as shown in FIG. 4, the members of the Y direction guide portion 11, the free end support portion 13, and the base plate 30 are also located on the XY virtual plane P.

  As shown in FIG. 11, in the digital camera 1, the battery B, the vibration detection sensor S for detecting the vibration of the digital camera 1, and the battery B based on the vibration information detected by the vibration detection sensor S are generated. A control circuit (control means) C is provided for allowing the generated power to flow in both coils CX and CY while changing the direction and size. Both the battery B and the vibration detection sensor S are electrically connected to the control circuit C, and the control circuit C is electrically connected to the conducting wire of the electric board 36.

Of the components of the camera shake correction device 5 described above, the stage device is configured by components excluding the battery B, the vibration detection sensor S, and the control circuit C.
The Y-direction guide unit 11, the free end support unit 13, the Y-direction moving member 20, the cover member 31, the X-direction guide unit 34, and the support unit 35 constitute a guide mechanism.
Further, the magnet MX and the yoke YX constitute an X-direction magnetic force generator (magnetic force generator), and the magnet MY and the yoke YY constitute a Y-direction magnetic force generator (magnetic force generator).

Next, the operation of the camera shake correction apparatus 5 will be described.
When photographing with the digital camera 1, the light transmitted through the lenses L <b> 1 to L <b> 3 forms an image on the imaging surface 3 a of the CCD 3 through the accommodation hole 10 a and the low-pass filter 32. At this time, when shooting is performed with the camera shake correction switch (not shown) of the digital camera 1 turned on, if the camera shake (image shake) does not occur in the digital camera 1, the vibration sensor S does not detect the vibration. 5 maintains the inoperative state shown in FIGS. 2 to 5 and 11. On the other hand, when camera shake occurs in the digital camera 1, the vibration sensor S detects vibration of the digital camera 1, and this vibration information is sent to the control circuit C. Then, as will be described below, the control circuit C causes the current generated in the battery B to flow through the X direction driving coil CX and the Y direction driving coil CY while adjusting the size and direction thereof.

The cover member 31 (electrical board 36) is movable in the X direction within a range in which the right side CX1 of the X direction driving coil CX maintains a superposition relationship with the N pole of the magnet MX and the left side CX2 with the S pole in the front-rear direction. is there.
In the non-actuated state shown in FIG. 13, for example, when a current in the direction indicated by the arrow in FIG. 13 flows through the X direction driving coil CX, a linear force FX in the right direction in the X direction is generated on the right side CX1 and the left side CX2. By this force FX, the X direction guide part 34 and the support part 35 move to the right side along the X direction bar-like parts 22, 23, so that the electric board 36 also moves relative to the fixed support board 10 to the right side. At this time, forces are also generated on the upper side CX3 and the lower side CX4, but these forces cancel each other, so that no force is exerted on the electric board 36.

When a current in the direction opposite to the arrow in FIG. 13 is passed through the X-direction driving coil CX, a linear force in the left direction in the X direction is generated on the right side CX1 and the left side CX2, and the electric board 36 has the X-direction rod-shaped portions 22, 23. And move to the left side relative to the fixed support substrate 10.
In this way, the control circuit C adjusts the direction of the current flowing through the X-direction drive coil CX, so that the right side CX1 is overlapped with the N pole, the left side CX2 is overlapped with the S pole, and the cover member 31 is accommodated in the housing hole 10a. The electric board 36 moves in the X direction (left-right direction) along the X-direction bar-shaped portions 22 and 23 within a range where the electric board 36 does not come into contact with.
Further, when power supply from the battery B to the X-direction drive coil CX is stopped, power in the X direction is lost at that moment, and the electric board 36 is stopped.
Further, since the magnitude of the current flowing through the X direction driving coil CX is proportional to the force generated, if the current supplied from the battery B to the X direction driving coil CX is increased, the force applied to the X direction driving coil CX is increased. Thus, if the current is reduced, the force applied to the X direction driving coil CX is reduced.

On the other hand, the cover member 31 (electrical board 36) moves in the Y direction within a range in which the upper side CY3 of the Y-direction driving coil CY maintains the overlapping relationship with the N pole of the magnet MY and the lower side CY4 in the front and rear direction. Is possible.
In the non-actuated state shown in FIG. 5, for example, when a current in the direction indicated by the arrow in FIG. 14 flows through the Y-direction driving coil CY, a linear force FY upward in the Y direction is generated on the upper side CY3 and the lower side CY4. . By this force FY, the Y-direction moving member 20 moves upward relative to the fixed support substrate 10 along the Y-direction guide groove 12 and the Y-direction long hole 14, so that the electric substrate 36 also moves upward. At this time, forces are also generated on the right side CY1 and the left side CY2, but these forces cancel each other, so that no force is exerted on the electric board 36.

When a current in the direction opposite to the arrow in FIG. 14 is passed through the Y-direction driving coil CY, a linear force in the Y-direction downward is generated on the upper side CY3 and the lower side CY4, and the electric board 36 is connected to the Y-direction guide groove 12 and the Y-direction driving groove CY. It moves relative to the fixed support substrate 10 along the direction long hole 14 downward.
By adjusting the direction of the current that the control circuit C passes through the Y-direction driving coil CY in this way, the upper side CY3 is overlapped with the N pole, the lower side CY4 is overlapped with the S pole, and the cover member 31 is accommodated in the housing hole 10a. The electric substrate 36 moves in the Y direction (up and down direction) along the Y direction guide groove 12 and the Y direction long hole 14 within a range where it does not contact with the Y direction.
Further, when power supply from the battery B to the Y-direction drive coil CY is stopped, the power in the Y direction is lost at that moment, and the electric board 36 is stopped.
Further, since the magnitude of the current flowing through the Y-direction driving coil CY is proportional to the force generated, if the current supplied from the battery B to the Y-direction driving coil CY is increased, the force applied to the Y-direction driving coil CY is large. Thus, if the current is reduced, the force applied to the Y-direction driving coil CY is reduced.

  As described above, the movement of the electric substrate 36 in the X direction and the Y direction changes the position of the CCD 3 fixed to the base plate 30 in the XY direction, and the camera shake correction is performed.

According to the present embodiment described above, both the coils CX and CY are formed on the electric board 36, and the yoke YX (and the magnet MX) and the yoke YY (and the magnet MY) are both provided on the fixed support board 10. The structure is simple and the manufacturing cost can be reduced.
Further, the X-direction driving coil CX and the Y-direction driving coil CY are provided on the electric board 36, and the conductive wire formed on the electric board 36 is connected to both the coils CX and CY. There is an advantage that it is not necessary to construct a new wiring for supplying power to the Y-direction driving coil CY.

  In addition, since the X-direction driving coil CX and the Y-direction driving coil CY have a planar shape parallel to the electric board 36, the number of turns of the X-direction driving coil CX and the Y-direction driving coil CY can be increased to increase the power. When trying to obtain, the X direction driving coil CX and the Y direction driving coil CY extend in the X direction and the Y direction. However, even if the number of turns of the X-direction driving coil C and the Y-direction driving coil CY is increased, the X-direction driving coil CX and the Y-direction driving coil CY do not increase in the optical axis O direction, and the yoke YX , YY does not increase in size in the optical axis O direction, so the digital camera 1 does not increase in size in the optical axis O direction.

  Further, the X-direction straight line LX overlaps with the center of gravity G of the X-direction moving body composed of the electric substrate 36, the base plate 30, the cover member 31, the low-pass filter 32, the pressing member 33, and the CCD 3 in the front-rear direction. The force generated in the working coil CX is efficiently transmitted to the electric board 36. On the other hand, the Y-direction straight line LY overlaps with the center of gravity of the Y-direction moving body obtained by adding the Y-direction moving member 20 to the X-direction moving body in the non-operating state, and this center of gravity is generated by the movement of the electric board 36 in the X direction. Even after a slight movement in the X direction, the force is generated in the Y direction driving coil CY efficiently transmitted to the electric board 36.

  In the above embodiment, the CCD 3 is fixed to the electric substrate 36, and the camera shake correction is performed by moving the CCD 3 in the X direction and the Y direction. For example, the CCD 3 is arranged behind the fixed support substrate 10, A circular mounting hole (not shown) is formed in the electric board 36, and a correction lens (not shown) is fitted and fixed in the mounting hole. The correction lens is fixed between the lens L1 and the lens L2 or between the lens L2 and the lens. You may arrange | position between L3. With this structure, it is possible to perform camera shake correction even when the correction lens is moved straight in the X direction and the Y direction. Further, a camera shake correction apparatus using such a correction lens can be applied to a silver salt camera by omitting the CCD 3.

  In this embodiment, both yokes YX and YY (and magnets MX and MY) are provided on the fixed support substrate 10 side, and both coils CX and CY are provided on the electric substrate 36 side. However, both coils are provided on the fixed support substrate 10 side. CX and CY may be provided, and both yokes YX and YY (and magnets MX and MY) may be provided on the electric substrate 36 side.

Note that the Y-direction rod-shaped portion 21 and the X-direction rod-shaped portions 22 and 23 constituting the Y-direction moving member 20 may not be complete linear members. For example, the Y-direction bar-shaped portion 21 only needs to be linear so that only the portion that fits into the guide portion 12a during movement in the Y direction faces the Y direction, and does not fit into the guide portion 12a during movement in the Y direction. The portion may be, for example, a curved shape when viewed from the front.
Further, if the Y-direction moving member 20 is highly rigid and hardly elastically deforms, the Y-direction guide portion 11 and the free end support portion 13 may be provided as one unit. Move smoothly in a straight line in the direction.

  The above is an embodiment in which the stage apparatus of the present invention is used for the camera shake correction apparatus 5. However, the use of the stage apparatus of the present invention is not limited to the camera shake correction apparatus 5, and an electric board is parallel to the electric board. It can be used for various devices that move in the direction and the Y direction.

1 is a longitudinal side view of a digital camera including a camera shake correction device according to an embodiment of the present invention. It is a rear view which shows the non-operation state of a camera shake correction apparatus, omitting an electric substrate and a yoke. It is the side view which abbreviate | omitted the stage of the camera-shake correction apparatus seen from the III arrow line direction of FIG. FIG. 4 is a bottom view of the camera shake correction device viewed from the direction of the arrow IV in FIG. 2. It is the side view which abbreviate | omitted the stage of the camera-shake correction apparatus seen from the arrow V direction of FIG. It is a rear view which shows the assembly state of a camera shake correction apparatus, abbreviate | omitting CCD, an electric substrate, and a yoke. It is sectional drawing which follows the VII-VII line of FIG. 6 which shows the state which fits a stage support member in the guide part of a Y direction guide part. It is sectional drawing which follows the VIII-VIII line of FIG. It is a rear view which shows the operating state of a camera-shake correction apparatus, abbreviate | omitting CCD, an electric board, and a yoke. It is the side view which abbreviate | omitted the stage of the camera-shake correction apparatus seen from the X arrow line direction of FIG. It is a rear view which shows a non-operation state of a camera shake correction device by breaking a yoke. It is sectional drawing which follows the XII-XII line | wire of FIG. It is an enlarged view which shows a X direction drive device typically. It is an enlarged view which shows a Y direction drive device typically.

Explanation of symbols

1 Digital camera (camera)
3 CCD (imaging device)
3a Image pickup surface 5 Camera shake correction device 10 Fixed support substrate 10a Housing hole 11 Y direction guide portion (guide mechanism)
12 Y direction guide groove 12a Guide part 12b Opening part 13 Free end support part (Guide mechanism)
14 Y direction long hole 20 Y direction moving member (guide mechanism)
21 Y-direction rod-shaped portion 22 23 X-direction rod-shaped portion 30 Base plate (guide mechanism)
31 Cover member 31a Daylighting hole 32 Low-pass filter 33 Holding member 34 X direction guide (guide mechanism)
34a X direction guide hole 35 Support part (guide mechanism)
35a Supporting groove 36 Electric board 36a 36b Protruding tongue B Battery B1 B2 B3 B4 Magnetic field lines (magnetic flux)
C Control means (control circuit)
CX X direction drive coil (drive coil)
CY Y-direction drive coil (drive coil)
GX Center of gravity of the X direction moving body LX X direction straight line LY Y direction straight line MX Magnet (magnetic force generator)
MY magnet (magnetic force generator)
O Optical axis P XY virtual plane S Vibration detection sensor X X direction Y Y direction YX Yoke (Magnetic force generator)
YY Yoke (Magnetic force generator)

Claims (8)

A fixed support substrate and an electric substrate parallel to each other;
A guide mechanism that guides the electric board with respect to the fixed support board so as to be movable in an X direction and a Y direction perpendicular to each other in a plane to which the electric board belongs;
An electromagnetic X-direction drive device and a Y-direction drive device that move the electric board relative to the fixed support substrate in the X direction and the Y direction. The X-direction drive device and the Y-direction drive device Are each a stage device comprising a driving coil through which a current flows and a magnetic force generator that exerts a magnetic force on the driving coil to linearly move the driving coil in the respective driving directions.
The driving coil is a planar coil located in a plane in which the winding is parallel to the electric board,
A stage apparatus, wherein the driving coil is provided on one of the fixed support substrate and the electric substrate, and the magnetic force generator is provided on the other. The stage apparatus according to claim 1, wherein
A stage apparatus in which the driving coil is provided on the electric substrate. The stage apparatus according to claim 2, wherein
A stage apparatus in which the driving coil is printed on the electric substrate. The stage apparatus according to claim 2 or 3,
A stage device in which the driving coil is mounted on a protruding tongue piece formed on the electric substrate. The stage apparatus according to any one of claims 2 to 4,
Magnetic generator
Magnets,
A yoke having a U-shaped cross section surrounding the coil, which is magnetized by the magnet and forms lines of magnetic force with the magnet;
A stage apparatus comprising: The stage apparatus according to any one of claims 1 to 5,
The driving coils of the X direction driving device and the Y direction driving device are provided on the electric board, and when viewed from a direction orthogonal to the electric board, the center of the driving coil of the X direction driving apparatus is the X direction. A stage device in which an X-direction straight line passing through and a Y-direction straight line passing through the center of the driving coil of the Y-direction driving device in the Y direction overlap with the center of gravity of the electric substrate or the vicinity of the center of gravity. A camera shake correction device using a stage device according to any one of claims 1 to 6,
A camera incorporating the stage device;
An image sensor having an imaging surface on the front surface that moves integrally with the electric substrate;
A vibration detection sensor for detecting the vibration of the camera;
Based on vibration information detected by the vibration detection sensor, control means for causing a current to flow through the driving coil so as to correct hand shake;
A camera shake correction device using a stage device comprising: A camera shake correction device using a stage device according to any one of claims 1 to 6,
A camera incorporating the stage device;
A correction lens for correcting camera shake, which moves integrally with the electric board;
A vibration detection sensor for detecting the vibration of the camera;
Based on vibration information detected by the vibration detection sensor, control means for causing a current to flow through the driving coil so as to correct hand shake;
A camera shake correction device using a stage device comprising:

Images