JP4684903B2 - Imaging device - Google Patents

Description

The present invention relates to an imaging apparatus having a movable imaging element .

  2. Description of the Related Art There is known an image pickup apparatus that performs image shake (hand shake) correction on an image pickup surface by driving the image pickup element in a plane orthogonal to the optical axis. In order to smoothly move such a movable image sensor, the connection means between the image sensor and the image processing circuit may be formed of a flexible substrate. However, if friction (movement resistance) acts due to the flexible substrate coming into contact with the fixed member, the load on the drive mechanism may increase and affect the drive accuracy of the image sensor. In order to avoid this, in the support structure of the flexible substrate, it is necessary to provide a support portion by a fixing member with a sufficient distance from the imaging element, which is a factor that hinders downsizing of the imaging apparatus.

Accordingly, the present invention provides an image pickup apparatus including an image pickup element that moves in a plane orthogonal to the optical axis, and stably controls the image pickup element by suppressing a movement resistance that acts on a flexible substrate that comes out of the image pickup element while having a compact structure. The purpose is to drive with high accuracy.

An image pickup apparatus according to the present invention includes an image pickup device that can move in a plane orthogonal to the optical axis, a flexible substrate that extends from the image pickup device, and a rearward position in the optical axis direction of the image pickup device, together with the image pickup device. It is characterized by having a movable flexible substrate support member that is moved in the direction orthogonal to the optical axis and that allows the flexible substrate coming out of the image sensor to be along the surface on the image sensor side.

  Preferably, the movable flexible substrate support member is a plate-like member substantially parallel to the moving plane of the image sensor, and the flexible substrate coming out of the image sensor is brought into surface contact with the surface of the movable flexible substrate support member on the image sensor side. .

  A rear protective member that covers the rear of the imaging device may be provided behind the movable flexible substrate support member in the optical axis direction. It is preferable that the rear protection member is fixed to the imaging apparatus main body.

  A part of the flexible substrate can be fixed to the rear protection member. In this case, the rear protection member may be a plate-like member that is substantially parallel to the moving plane of the imaging device, and the flexible substrate may be fixed to the surface of the rear protection member opposite to the side facing the flexible substrate support member. The movable flexible substrate support member may prevent the flexible substrate coming out of the image sensor from coming into contact with the rear protection member in a region other than the fixed portion with respect to the rear protection member.

  In addition, an external display device that faces the outer surface of the imaging device is provided further rearward of the rear protective member, and the flexible substrate that has come out of the external display device extends into the space between the external display device and the rear protective member. Is preferred.

  In the above flexible substrate arrangement structure, an imaging element fixing member to which the imaging element is fixed, a holding member that holds the imaging element fixing member and is supported so as to be movable along a plane orthogonal to the optical axis, An inclination adjusting mechanism that changes a holding angle of the imaging element fixing member with respect to the holding member, and the movable flexible substrate support member may be fixed to the holding member.

The present invention also provides an imaging apparatus in which an imaging element movable in a plane orthogonal to the optical axis and a fixed substrate are connected by a flexible substrate, and is located behind the imaging element in the optical axis direction, and a part of the flexible substrate is fixed. And a flexible substrate that is located in the position in the optical axis direction between the rear protection member and the image sensor, is moved in the direction orthogonal to the optical axis together with the image sensor, and comes out of the image sensor on the surface on the image sensor side And a movable flexible substrate support member that is arranged along the line.

According to the image pickup apparatus of the present invention , it is possible to drive the image pickup element stably and with high accuracy by suppressing the movement resistance acting on the flexible substrate coming out of the image pickup element with a compact structure.

"Description of the entire digital camera to which the present invention is applied "
FIG. 1 shows the appearance of a digital camera 200 to which the present invention is applied . A zoom lens barrel 201, an optical viewfinder 203, and a strobe 204 are provided on the front of the camera body 202, and a shutter button 205 is provided on the upper surface of the camera body 202.

  The zoom lens barrel 201 of the digital camera 200 whose side cross section is shown in FIGS. 2 and 3 is extended from the camera body 202 to the subject side as shown in FIG. 2 at the time of shooting, and as shown in FIG. 3 when shooting is not performed. The body 202 is accommodated (collapsed). In FIG. 2, the zoom lens barrel 201 shows a photographing state in which the upper half section is the wide end and the lower half section is the tele end. As shown in FIGS. 5 and 6, the zoom lens barrel 201 includes a second group straight guide ring 10, a cam ring 11, a third feed cylinder 12, a second feed cylinder 13, a straight guide ring 14, and a first feed cylinder 15. A plurality of substantially concentric annular (cylindrical) members such as a helicoid ring 18 and a stationary ring 22 are provided, and a common central axis of these annular members is shown as a lens barrel central axis Z0 in FIGS.

  The imaging optical system of the zoom lens barrel 201 includes a first lens group LG1, a shutter S and an aperture A, a second lens group LG2, a third lens group LG3, a low-pass filter 25, and a CCD 60 in order from the object side. Each optical element from the first lens group LG1 to the CCD 60 is located on a common photographing optical axis (common optical axis) Z1 in the photographing state. The photographing optical axis Z1 is parallel to the lens barrel central axis Z0 and is eccentric downward with respect to the lens barrel central axis Z0. Zooming is performed by moving the first lens group LG1 and the second lens group LG2 along a photographing optical axis Z1 along a predetermined locus, and focusing is performed by moving the third lens group LG3 in the same direction. In the following description, the “optical axis direction” means a direction parallel to the photographing optical axis Z1, and the subject side is the front and the image plane side is the rear. In the plane perpendicular to the photographing optical axis Z1, the vertical direction is the Y axis, and the horizontal direction is the X axis.

  The fixed ring 22 is fixed in the camera body 202, and a fixed holder 23 is fixed to the rear part of the fixed ring 22. The fixed holder 23 supports a CCD 60 and a low-pass filter 25 so as to be movable in the X-axis direction and the Y-axis direction via the Y stage 71 and the X stage 21. At the rear of the fixed holder 23, an LCD (external display device) 20 for displaying images and photographing information is provided. The LCD 20 has its display screen facing the rear surface side of the camera body 202, and an LCD flexible substrate 20a extends from the lower part thereof.

  The third group lens frame 51 that holds the third lens group LG3 is guided straight in a direction parallel to the photographic optical axis Z1 via the guide shafts 52 and 53, and is urged forward by the third group frame urging spring 55. Has been. The third group lens frame 51 is abutted with an AF nut 54 guided in a straight line in the optical axis direction, and the AF nut 54 is screwed to a feed screw formed on the peripheral surface of the drive shaft of the focus motor 160. When the AF nut 54 is moved backward in accordance with the rotation of the drive shaft of the focus motor 160, the third group lens frame 51 is pressed by the AF nut 54 and moved backward. Conversely, when the AF nut 54 is moved forward, the third group lens frame 51 is moved forward following the AF nut 54 by the biasing force of the third group frame biasing spring 55. With the above structure, the third group lens frame 51 can be moved back and forth in the optical axis direction.

  As shown in FIG. 4, a zoom motor 150 is supported on the fixed ring 22. The driving force of the zoom motor 150 is transmitted to the zoom gear 28 (FIG. 5) via the reduction gear mechanism. The zoom gear 28 is pivotally attached to the fixed ring 22 by a zoom gear shaft 29 parallel to the photographing optical axis Z1.

  A helicoid ring 18 is supported inside the fixed ring 22. The helicoid ring 18 is rotationally driven by a zoom gear 28, and the helicoid ring 18 rotates in the direction of the optical axis while rotating through the helicoid mechanism from the housed state in FIG. 3 to the photographing state in FIG. 2 (and vice versa). In the imaging state of FIG. 2 (between the wide end and the tele end), the helicoid ring 18 is rotated at a fixed position without moving in the optical axis direction. The first feeding cylinder 15 is coupled with the helicoid ring 18 so as to rotate and move in the optical axis direction.

  A straight guide ring 14 is supported inside the first feeding cylinder 15 and the helicoid ring 18. The rectilinear guide ring 14 is linearly guided in the optical axis direction through a linear groove formed in the fixed ring 22, and relative rotation is possible with respect to the first feeding cylinder 15 and the helicoid ring 18 in the optical axis direction. They are engaged so as to move together.

  As shown in FIG. 5, the linear guide ring 14 has a through guide groove 14 a penetrating the inner peripheral surface and the outer peripheral surface. The penetrating guide groove 14 a has a lead groove portion that is inclined with respect to the photographing optical axis Z <b> 1 and a circumferential groove portion that is centered on the lens barrel central axis Z <b> 0, and is provided on the outer peripheral surface of the cam ring 11. The outer diameter protrusion 11a is slidably fitted. The outer diameter protrusion 11a is further engaged with a rotation transmission groove 15a formed on the inner peripheral surface of the first feeding cylinder 15 and parallel to the photographing optical axis Z1, and the cam ring 11 is rotated together with the first feeding cylinder 15. . When the outer diameter protrusion 11a is engaged with the lead groove portion of the penetrating guide groove 14a, the cam ring 11 is advanced and retracted in the optical axis direction while rotating by receiving the guide of the lead groove portion, and the circumferential direction of the penetrating guide groove 14a. When the outer diameter protrusion 11a is engaged with the groove portion, it rotates at a fixed position without moving in the optical axis direction. Similar to the helicoid ring 18, the cam ring 11 is rotated and retracted between the retracted state of FIG. 3 and the shooting state of FIG. 2 (and vice versa), and in the shooting state of FIG. 2 (between the wide end and the tele end) The ring 11 is rotated in place.

  The rectilinear guide ring 14 linearly guides the second group rectilinear guide ring 10 and the second feeding cylinder 13 in the optical axis direction by linear grooves formed on the inner peripheral surface thereof and parallel to the photographing optical axis Z1. The second group rectilinear guide ring 10 linearly guides the second group lens moving frame 8 supporting the second lens group LG2 in the optical axis direction, and the second feeding cylinder 13 supports the third feeding cylinder supporting the first lens group LG1. 12 is guided straight in the direction of the optical axis. The second group rectilinear guide ring 10 and the second feeding cylinder 13 are supported so as to be relatively rotatable with respect to the cam ring 11 and to move integrally in the optical axis direction.

  A second group cam follower 8 a provided on the outer peripheral surface of the second group lens moving frame 8 is engaged with the second group guide cam groove 11 b formed on the inner peripheral surface of the cam ring 11. Since the second group lens moving frame 8 is guided linearly in the optical axis direction via the second group linear guide ring 10, when the cam ring 11 rotates, the second group lens moving frame 8 follows the shape of the second group guide cam groove 11 b. Moves along a predetermined locus in the optical axis direction.

  As shown in FIG. 6, the second group lens frame 6 that holds the second lens group LG <b> 2 is supported on the inner side of the second group lens moving frame 8 so as to be rotatable about the retraction rotation shaft 33. The retraction rotation shaft 33 is an axis parallel to the photographing optical axis Z1, and the second lens group LG2 is moved to the photographing position (FIG. 2) on the photographing optical axis Z1 when the second group lens frame 6 swings. It is moved to the retracted position (FIG. 3) retracted above the optical axis Z1. The second group lens frame 6 is urged toward the photographing position by a torsion spring 39, and the second holder lens frame 6 is moved against the torsion spring 39 when the second group lens moving frame 8 is retracted to the fixed holder 23. A retracting cam projection 23a is provided for rotating to the retracted position.

  The second delivery cylinder 13 guided linearly in the optical axis direction by the second group linear guide ring 10 further guides the third extension cylinder 12 in the optical axis direction. The third feeding cylinder 12 has a first group cam follower 31 projecting in the inner diameter direction, and the first group cam follower 31 is slidably fitted in a first group guide cam groove 11 c formed on the outer peripheral surface of the cam ring 11. is doing. The first group lens frame 1 is supported in the third feeding cylinder 12 via the first group adjustment ring 2. The first group lens frame 1 holds the first lens group LG1.

  A shutter unit 100 having a shutter S and a diaphragm A is supported between the first lens group LG1 and the second lens group LG2. The shutter unit 100 is fixed inside the second group lens moving frame 8.

  The zoom lens barrel 201 having the above structure operates as follows. When the main switch 101 (FIG. 25) provided on the outer surface of the digital camera 200 is turned on in the lens barrel storage state of FIG. 3, the zoom motor 150 is driven in the lens barrel feeding direction under the control of the control circuit 102 (FIG. 25). . The zoom gear 150 is rotationally driven by the zoom motor 150, and the helicoid ring 18 and the first feeding cylinder 15 are rotated forward by the helicoid. The rectilinear guide ring 14 moves straight forward together with the first feeding cylinder 15 and the helicoid ring 18. At this time, the cam ring 11 to which the rotational force is applied from the first feeding cylinder 15 has a lead structure (penetration guide groove) provided between the linear movement of the linear guide ring 14 forward and the linear guide ring 14. The combined movement of the lead groove portion of 14a and the feeding portion by the outer diameter projection 11a) is performed. When the helicoid ring 18 and the cam ring 11 are drawn out to a predetermined position in front, the functions of the respective rotary feeding structures (helicoid, lead) are canceled and only the circumferential rotation about the lens barrel central axis Z0 is performed. become.

  When the cam ring 11 rotates, on the inner side, the second group lens moving frame 8 guided linearly through the second group linear guide ring 10 is in the optical axis direction due to the relationship between the second group cam follower 8a and the second group guide cam groove 11b. Is moved along a predetermined trajectory. 3, the second group lens frame 6 in the second group lens moving frame 8 is held at a retracted position away from the photographing optical axis Z1 by the action of the retracting cam projection 23a protruding from the fixed holder 23. The second group lens frame 6 is separated from the retracting cam projection 23a while the second group lens moving frame 8 is extended to the zoom region, and the optical axis of the second lens group LG2 is moved by the urging force of the torsion spring 39. It is rotated to a photographing position (FIG. 2) that coincides with Z1. Thereafter, the second group lens frame 6 is held at the photographing position until the zoom lens barrel 201 is moved again to the storage position.

  Further, when the cam ring 11 rotates, the third feeding cylinder 12 guided linearly through the second feeding cylinder 13 on the outside of the cam ring 11 is related to the first group cam follower 31 and the first group guiding cam groove 11c. Is moved along a predetermined locus in the optical axis direction.

  That is, the former positions of the first lens group LG1 and the second lens group LG2 with respect to the imaging surface (CCD light-receiving surface) are respectively the forward movement amount of the cam ring 11 with respect to the fixed ring 22, and the third position with respect to the cam ring 11. The sum is determined as the sum of the cam feed amount of the feed cylinder 12 and the latter is the sum of the forward movement amount of the cam ring 11 relative to the fixed ring 22 and the cam feed amount of the second group lens moving frame 8 relative to the cam ring 11. Determined. Zooming is performed by moving the first lens group LG1 and the second lens group LG2 on the photographing optical axis Z1 while changing the air interval between them. When the lens barrel is extended from the storage position of FIG. 3, first, the wide end extended state shown in the upper half section of FIG. 2 is obtained, and when the zoom motor 150 is further driven in the lens barrel extending direction, the lower half section of FIG. As shown in FIG. As can be seen from FIG. 2, in the zoom lens barrel 201 of the present embodiment, the distance between the first lens group LG1 and the second lens group LG2 is large at the wide end, and the first lens group LG1 and the second lens at the tele end. The group LG2 moves in the direction of mutual approach, and the interval is reduced. Such a change in the air gap between the first lens group LG1 and the second lens group LG2 is given by the locus of the second group guide cam groove 11b and the first group guide cam groove 11c. In the zoom region between the tele end and the wide end, the cam ring 11, the first feeding cylinder 15, and the helicoid ring 18 perform only the above-mentioned fixed position rotation, and do not advance or retreat in the optical axis direction.

  When the zoom lens barrel 201 is ready to shoot from the wide end to the tele end, the third lens group LG3 (third group) is driven by driving the AF motor 160 according to the subject distance information obtained by the distance measuring means. The lens frame 51) moves along the photographing optical axis Z1 to perform focusing.

  When the main switch 101 is turned off, the zoom motor 150 is driven in the lens barrel storage direction, and the zoom lens barrel 201 performs a retracting operation opposite to the above-described feeding operation, resulting in the retracted state of FIG. In the middle of the movement to the storage position, the second group lens frame 6 is rotated to the retracted position by the retracting cam projection 23 a and retracts together with the second group lens moving frame 8. When the zoom lens barrel 201 is moved to the storage position, the second lens group LG2 is stored at the same position as the third lens group LG3, the low-pass filter 25, and the CCD 60 in the optical axis direction (in the radial direction of the barrel). Overlap). Due to the retracting structure of the second lens group LG2 at the time of storage, the storage length of the zoom lens barrel 201 is shortened, and the thickness of the camera body 202 in the left-right direction in FIG. 3 can be reduced.

  The digital camera 200 includes an image shake correction device. This image shake correction apparatus moves the CCD 60 along a plane perpendicular to the photographing optical axis Z1 in accordance with the magnitude and direction of shake (hand shake) applied to the digital camera 200, and shakes the subject image picked up by the CCD 60. The control is performed by the control circuit 102 (FIG. 25). 7 to 9 show the shake correction unit IS including the CCD 60, and FIGS. 10 to 23 show a state in which the whole or a part of the shake correction unit IS is disassembled.

  The fixed holder 23 is provided with a pair of Y guide rods 73 and 79 in the Y-axis direction (vertical direction). The Y guide rods 73 and 79 have a guide hole 71a and a guide groove 71b ( FIG. 16) is movably supported. A pair of X guide rods 72 and 74 are provided on the Y stage 71 in the X-axis direction orthogonal to the Y guide rod 73, and the guide holes 21 a of the X stage 21 are provided in the X guide rods 72 and 74. The guide groove 21b (FIGS. 11 and 12) is supported movably. A CCD 60 and a low-pass filter 25 are fixed on the X stage 21. Therefore, the CCD 60 is supported by the fixed holder 23 through the Y stage 71 and the X stage 21 so as to be movable in two orthogonal directions on a plane perpendicular to the photographing optical axis Z1. The movable range of the X stage 21 in the X axis direction is restricted by the inner peripheral surface of the Y stage 71, and the movable range of the Y stage 71 in the Y axis direction is restricted by the inner peripheral surface of the fixed holder 23.

  An X stage biasing spring 87 x is stretched between a spring hooking protrusion 21 v provided on the X stage 21 and a spring hooking protrusion 23 vx provided on the fixed holder 23. The X stage biasing spring 87x is a tension spring that biases the X stage 21 to the right when viewed from the front (front) of the zoom lens barrel 201 and to the left when viewed from the back. Further, a Y stage biasing spring 87 y is stretched between a spring hooking protrusion 71 v provided on the Y stage 71 and a spring hooking protrusion 23 vy provided on the fixed holder 23. The Y stage urging spring 87y is a tension spring and urges the Y stage 71 downward.

  As shown in FIGS. 16 and 17, a Y moving member 80 is supported on one side of the Y stage 71. The Y moving member 80 is a member that is long in the Y-axis direction, and has position restriction flanges 80a and 80b in the vicinity of the upper and lower ends thereof. A guide pin 80c projects downward from the lower position restriction flange 80a, and a pair of guide holes 80d are formed in the upper position restriction flange 80b. The Y moving member 80 is further provided with a nut abutting portion 80e and a rectilinear groove 80f (FIG. 16) at a position adjacent to the position restricting flange 80b, and a linear portion between the position restricting flange 80a and the position restricting flange 80b. A spring hooking projection 80g is provided. The rectilinear groove 80f is a groove facing in the Y-axis direction.

  The Y stage 71 has a position restricting flange 71c facing the position restricting flange 80a and a position restricting flange 71d facing the position restricting flange 80b, and a guide pin 80c is slidably fitted to the position restricting flange 71c. A hole 71e is formed, and a pair of guide pins 71f that are slidably fitted into the pair of guide holes 80d project from the position regulating flange 71d. A spring hooking projection 71g is provided in a linear portion between the position restriction flange 80a and the position restriction flange 80b.

  Due to the relationship between the guide hole 71e and the guide pin 80c, and the guide pin 71f and the guide hole 80d, the Y stage 71 and the Y moving member 80 guide and support each other so as to be relatively movable in the Y-axis direction. A tension coupling spring 81y is stretched between the spring latching projection 71g of the Y stage 71 and the spring latching projection 80g of the Y moving member 80, and the urging force of the tension coupling spring 81y is applied to the position regulation flange 80a and the position regulation flange 80a. The direction in which the flange 71c, the position restriction flange 80b and the position restriction flange 71d are brought into contact with each other, that is, the Y stage 71 acts upward and the Y moving member 80 acts downward.

  In addition to the X guide rods 72 and 74 that guide and support the X stage 21, the fixed holder 23 is provided with a pair of X guide rods 77 and 78 that face in the X-axis direction. The first X moving member 75 is movably supported. As shown in FIGS. 14 and 15, the first X moving member 75 is a member that is long in the X-axis direction, and position restricting flanges 75 a and 75 b are provided in the vicinity of both sides thereof. A pair of guide holes 75c through which the X guide rod 77 is inserted are formed so as to penetrate both the position restricting flanges 75a and 75b, and only one guide hole 75d through which the X guide rod 78 is inserted is formed in the position restricting flange 75a. The The position restricting flange 75a is formed with a pair of guide holes 75e positioned between the guide hole 75c and the guide hole 75d. The position restricting flange 75b has a guide pin 75f that faces the X-axis direction separately from the guide hole 75c. Is protruding. The first X moving member 75 is further provided with an interlocking protrusion 75g below the position restricting flange 75a, and a spring hooking protrusion 75h at a linear portion between the position restricting flange 75a and the position restricting flange 75b.

  The second X moving member 76 has position restricting flanges 76a and 76b spaced apart in the X-axis direction, and a pair of guides slidably fitted into the guide hole 75e of the first X moving member 75 on one position restricting flange 76a. A pin 76c is projected, and a guide hole 76d into which the guide pin 75f of the first X moving member 75 is slidably fitted is formed in the other position regulating flange 76b. The second X moving member 76 is further provided with a nut contact portion 76e and a rectilinear groove 76f at a position adjacent to the position restricting flange 76a, and a spring hooking protrusion 76g on a linear portion between the position restricting flange 76a and the position restricting flange 76b. Is provided. The rectilinear groove 76f is a groove facing the X-axis direction.

  Due to the sliding relationship between the guide pin 76c and the guide hole 75e and between the guide hole 76d and the guide pin 75f, the first X moving member 75 and the second X moving member 76 guide and support each other so as to be relatively movable in the X-axis direction. A tension coupling spring 81x is stretched between the spring hooking protrusion 75h and the spring hooking protrusion 76g, and the biasing force of the tension coupling spring 81x is the position restriction flange 75a, the position restriction flange 76a, and the position restriction flange 75b. It acts in the direction in which the restriction flange 76b is brought into contact.

  The interlocking protrusion 75g of the first X moving member 75 is in contact with a transmission roller 21c (FIGS. 12 and 13) provided on the X stage 21, and the X-axis from the first X moving member 75 to the X stage 21 by this contact portion. Directional moving force is transmitted. The transmission roller 21c is rotatably supported by an axis parallel to the photographing optical axis Z1, and when the X stage 21 moves in the Y axis direction together with the Y stage 71, the transmission roller 21c moves on the contact surface of the interlocking protrusion 75g. Roll. Since the roller contact surface on the interlocking projection 75g side is a flat surface facing the Y-axis direction, the X stage 21 can be moved without applying a force in the Y-axis direction to the first X moving member 75 by rolling the transmission roller 21c. It can be moved in the Y-axis direction.

  As shown in FIG. 11, an X-axis drive motor 170x that is a drive source in the X-axis direction and a Y-axis drive motor 170y that is a drive source in the Y-axis direction are motor brackets 23bx and 23by provided in the fixed holder 23. It is fixed to. Both the X-axis drive motor 170x and the Y-axis drive motor 170y are stepping motors, and feed screws 171x and 171y are formed on the drive shafts. An X drive nut 85x is screwed to the feed screw 171x, and a Y drive nut 85y is screwed to the feed screw 171y. The X drive nut 85x is linearly guided in the X-axis direction by the rectilinear groove 76f of the second X moving member 76, and abuts against the nut abutting portion 76e. The Y drive nut 85y is linearly guided in the Y-axis direction by the rectilinear groove 80f of the Y moving member 80, and abuts against the nut abutting portion 80e. The nuts 85x and 85y can be detached by releasing screwing from both ends of the corresponding feed screws 171x and 171y. Nut biasing springs 89x and 89y are arranged between the X drive nut 85x and the X axis drive motor 170x and between the Y drive nut 85y and the Y axis drive motor 170y. Each of the nut biasing springs 89x and 89y is a compression coil spring, and when the nuts 85x and 85y are disengaged from the corresponding feed screws 171x and 171y toward the drive motors 170x and 170y, the biasing force for re-engaging them. Is given. When the nuts 85x and 85y are disengaged from the corresponding distal ends of the feed screws 171x and 171y (opposite to the drive motors 170x and 170y), the biasing force of the X stage biasing spring 87x and the Y stage biasing spring 87y Thus, an urging force in the re-threading direction is applied.

  The structure of the above shake correction unit IS is schematically shown in FIG. In FIG. 24, the shake correction unit IS is viewed from the back side of the digital camera 200. 24, part of the positional relationship between the X guide rod 78 and the guide pin 76c is different from that in FIGS. As can be seen from this schematic diagram, in the drive mechanism in the X-axis direction, the first X moving member 75 and the second X moving member 76 have the position restricting flange 75a abutting against the position restricting flange 76a and the position restricting flange 75b being the position restricting flange. In the state of abutting on 76b, it is elastically coupled by the urging force of the tension coupling spring 81x. The urging force of the X stage urging spring 87x acts on the first X moving member 75 via the transmission roller 21c that contacts the interlocking protrusion 75g. The urging force of the X stage urging spring 87x acts on the left in FIG. 24, that is, in the direction in which the position restricting flanges 75a and 75b are separated from the position restricting flanges 76a and 76b. Is set stronger than the biasing force of the X stage biasing spring 87x. Therefore, the first X moving member 75 and the second X moving member 76 maintain the elastic coupling state in which the position restricting flange 75a and the position restricting flange 76a, and the position restricting flange 75b and the position restricting flange 76b are in contact with each other, and the X stage as a whole. The biasing spring 87x is biased leftward in FIG. Then, the movement of the second X moving member 76 to the left in FIG. 24 is restricted by the nut abutting portion 76e coming into contact with the X driving nut 85x. Therefore, the position of the X driving nut 85x is the first in the X axis direction. This is the reference position for the 2X moving member 76 and the first X moving member 75.

  When the drive shaft of the X-axis drive motor 170x is rotationally driven, the X drive nut 85x screwed with the feed screw 171x is linearly moved in the X-axis direction, and the X-axis direction positions of the second X moving member 76 and the first X moving member 75 are moved. Change. For example, when the X drive nut 85x is moved to the right in FIG. 24, the X drive nut 85x presses the nut contact portion 76e, and against the X stage biasing spring 87x, the second X moving member 76 and the first The 1X moving member 75 is moved integrally to the right in the figure. When the first X moving member 75 is moved to the right in FIG. 24, the interlocking protrusion 75g presses the transmission roller 21c, and the X stage 21 is also moved to the right in FIG. Conversely, when the X drive nut 85x is moved to the left, the second X moving member 76 and the first X moving member 75 follow the X drive nut 85x and are integrated to the left by the biasing force of the X stage biasing spring 87x. Moved to. At this time, the X stage 21 is moved to the left in the figure following the first X moving member 75 by the biasing force of the X stage biasing spring 87x. The interlocking protrusion 75g and the transmission roller 21c are always kept in contact with each other by the biasing force of the X stage biasing spring 87x.

  In the drive mechanism in the Y-axis direction, the Y stage 71 and the Y moving member 80 are tensioned in a state where the position restricting flange 71c is in contact with the position restricting flange 80a and the position restricting flange 71d is in contact with the position restricting flange 80b. It is elastically coupled by a coupling spring 81y. The Y stage 71 is urged downward in FIG. 24 by the Y stage urging spring 87y, that is, in a direction in which the position restricting flanges 71c and 71d are separated from the position restricting flanges 80a and 80b. The force is set stronger than the biasing force of the Y stage biasing spring 87y. Therefore, the Y stage 71 and the Y moving member 80 maintain the elastic coupling state in which the position restricting flange 71c and the position restricting flange 80a and the position restricting flange 71d and the position restricting flange 80b are in contact with each other, and the Y stage biasing spring as a whole. It is biased downward by 87y. Since the downward movement of the nut abutting portion 80e against the Y drive nut 85y is restricted, the position of the Y drive nut 85y is the reference position of the Y moving member 80 and the Y stage 71 in the Y axis direction. It becomes.

  When the drive shaft of the Y-axis drive motor 170y is rotationally driven, the Y drive nut 85y screwed with the feed screw 171y is linearly moved in the Y-axis direction, and the Y-axis position of the Y moving member 80 and the Y stage 71 changes. For example, when the Y drive nut 85y is moved upward in FIG. 24, the nut contact portion 80e is pressed against the Y drive nut 85y, and the Y moving member 80 and the Y stage 71 are resisted against the Y stage biasing spring 87y. Are integrally moved upward in FIG. Conversely, when the Y drive nut 85y is moved downward, the urging force of the Y stage urging spring 87y causes the Y moving member 80 and the Y stage 71 to move integrally downward following the Y drive nut 85y.

  When the Y stage 71 moves in the Y axis direction, the X stage 21 supported on the Y stage 71 also moves in the Y axis direction. On the other hand, since the first X moving member 75 with which the transmission roller 21c provided on the X stage 21 abuts does not move in the Y-axis direction, when the X stage 21 moves up and down together with the Y stage 71, the transmission roller 21c and the interlocking projection 75g The contact location changes. As described above, at this time, the transmission roller 21c rolls on the contact surface of the interlocking protrusion 75g, and the X stage 21 is moved in the Y axis direction without applying a moving force in the Y axis direction to the first X moving member 75. Can be made.

  From the above structure, by driving the X-axis drive motor 170x forward and backward, the X stage 21 can be moved forward and backward in the X-axis direction, and by driving the Y-axis drive motor 170y forward and backward, The Y stage 71 and the X stage 21 supported by the Y stage 71 can be moved forward and backward in the Y-axis direction.

  As shown in FIGS. 14 and 15, the first X moving member 75 is provided with a plate-like position detector 75 i in the vicinity of the position restricting flange 75 a. Further, as shown in FIG. 16, the Y stage 71 is provided with a plate-like position detecting portion 71h in the vicinity of the position restricting flange 71c. As shown in FIGS. 18 and 19, the photo interrupter 103 capable of detecting the passage of the position detector 75 i provided in the first X moving member 75 and the passage of the position detector 71 h provided in the Y stage 71 are detected. A photo interrupter 104 is provided. By detecting the passage of each position detector 75i, 71h by the photo interrupters 103, 104, the first X moving member 75 (that is, the X stage 21) in the X axis direction and the initial position of the Y stage 71 in the Y axis direction are detected. can do.

  As shown in the block diagram of FIG. 25, the digital camera 200 includes an X gyro sensor (angular velocity sensor) 105 and a Y gyro sensor (angular velocity sensor) 106 for detecting a moving angular velocity around the X axis and the Y axis. The speed (size) and direction of the shake are detected by the gyro sensors 105 and 106. Subsequently, the control circuit 102 obtains a moving angle by time-integrating the angular velocities in the X- and Y2-axis directions detected by the X gyro sensor 105 and the Y gyro sensor 106, and determines the moving angle from the moving angle (imaging surface of the CCD 60). The X stage 21 (the first X moving member 75 and the second X moving member 76) and Y for each axial direction for calculating the amount of movement of the image in the X axis direction and the Y axis direction and canceling the image shake are calculated. The drive amount and drive direction (drive pulses of the X-axis drive motor 170x and the Y-axis drive motor 170y) of the stage 71 (Y moving member 80) are calculated. Based on this calculated value, the X-axis drive motor 170x and the Y-axis drive motor 170y are driven and controlled. Thereby, the shake of the subject image picked up by the CCD 60 is suppressed. The image blur correction mode can be entered by turning on the shooting mode changeover switch 107 (FIG. 25). When the shooting mode changeover switch 107 is turned off, the image blur correction function is stopped and normal shooting can be performed. . The shooting mode changeover switch 107 further operates in the first follow-up mode in which the X-axis drive motor 170x and the Y-axis drive motor 170y are always driven to perform shake correction in the image shake correction mode, and the photometry switch 108 and the release switch 109 are operated. The second follow-up mode in which the shake correction is performed by driving each X-axis drive motor 170x and Y-axis drive motor 170y only at times can be selected. Note that the photometry switch 108 is turned on when the shutter button 205 is half-pressed, and the release switch 109 is turned on when the shutter button 205 is fully pressed.

  In the above image blur correction apparatus in the digital camera 200, the driving force transmission mechanism from each of the drive motors 170x and 170y to the CCD 60 (X stage 21) to be driven absorbs a load and an impact and feed screws 171x and 171y. It has a structure that prevents damage. This damage prevention structure is constituted by a first X moving member 75 and a second X moving member 76 that are spring-coupled in the drive mechanism in the X-axis direction, and a Y-stage 71 that is spring-coupled in the drive mechanism in the Y-axis direction. And the Y moving member 80.

  For example, when the X drive nut 85x is driven to the right in FIG. 24 by the X axis drive motor 170x, the X stage 21 comes into contact with the Y stage 71 to reach the movement restriction end, or the X stage 21 moves due to other causes. The first X moving member 75 and the second X moving member 76, which normally move together, resist the urging force of the tension coupling spring 81x, and the position restricting flanges 75a and 76a and the position restricting flanges 75b and 76b. Move relative to each other in the direction of separating them. Specifically, the second X moving member 76 can move alone to the right in FIG. 24 with respect to the first X moving member 75 that is prevented from moving together with the X stage 21. As a result, even if the X stage 21 becomes immovable, the X drive nut 85x can move along the feed screw 171x, so that an excessive load is not applied and the screwed portion is bitten. There is no risk of damage to other power transmission parts. When the X drive nut 85x is driven to the left in FIG. 24 by the X axis drive motor 170x, the X drive nut 85x moves in a direction away from the nut contact portion 76e. No motor driving force acts on the 1X moving member 75, and even if the movement of the X stage 21 is hindered, no excessive force is applied to the driving force transmission mechanism.

  The drive mechanism in the Y-axis direction has the same function. For example, when the Y drive nut 85y is driven upward in FIG. 24 by the Y axis drive motor 170y, the Y stage 71 comes into contact with the fixed holder 23 to reach the movement restricting end, or the Y stage 71 (or X When the movement of the stage 21) is hindered, the Y moving member 80 and the Y stage 71, which normally move together, resist the biasing force of the tension coupling spring 81y, and the position restriction flanges 71c, 80a and the position restriction flange 71d. , 80b are moved relative to each other in the direction of separating them. Specifically, the Y moving member 80 can move alone upward in FIG. 24 with respect to the Y stage 71 whose movement is prevented. As a result, even if the Y stage 71 cannot move, the Y drive nut 85y can move along the feed screw 171y, so that an excessive load is not applied and the screwed portion is bitten. There is no risk of damage to other power transmission parts. Note that when the Y drive nut 85y is driven downward in FIG. 24 by the Y axis drive motor 170y, the Y drive nut 85y moves in a direction away from the nut abutting portion 80e, and therefore the Y moving member 80 and the Y stage 71 are moved. No motor driving force is applied to the driving force transmission mechanism, and even if the movement of the Y stage 71 is hindered, no excessive force is applied to the driving force transmission mechanism.

  As described above, the moving end of the X stage 21 in the X axis direction is determined by the inner peripheral surface of the Y stage 71, and the moving end of the Y stage 71 in the Y axis direction is determined by the inner peripheral surface of the fixed holder 23. Ideally, when the X stage 21 reaches the left and right moving ends, the driving force transmission from the feed screw 171x to the X drive nut 85x is interrupted, and when the Y stage 71 reaches the up and down moving ends, the feed screw It is preferable that transmission of the driving force from 171y to the Y driving nut 85y is cut off, but such an ideal relationship is not always obtained in consideration of the accuracy error of components. For example, when the X stage 21 (or Y stage 71) has reached the mechanical moving end and the screwing length of the drive nut 85x (85y) and the feed screw 171x (171y) is still sufficient, as described above. If the damage prevention structure is not provided, a load is applied by further motor driving, and the drive nut 85x (85y) and the feed screw 171x (171y) may be bitten. As a measure to prevent this, a sufficient margin is provided for the movable amount so that the X stage 21 and the Y stage 71 do not easily reach the moving end, and drive nuts are provided at both ends of the feed screw 171x (171y). It is conceivable that the drive nut 85x (85y) is configured to drop off when the screw thread engagement is released when 85x (85y) reaches. However, in this configuration, the movable range of the X stage 21 and the Y stage 71 must be increased more than necessary, and the entire apparatus may be increased in size. In addition, when the X stage 21 or the Y stage 71 has a movement failure at an intermediate position unrelated to the moving end, a large load is applied to the screwed portion regardless of the movable range of the X stage 21 or the Y stage 71. It will take. On the other hand, in the image shake correction apparatus of the present embodiment, the movement amount is reduced by the relative movement of the intermediate members (first X moving member 75 and second X moving member 76, Y stage 71 and Y moving member 80) provided in the drive mechanism. Since the error is absorbed, it is not necessary to increase the movable range of the X stage 21 and the Y stage 71 more than necessary. Further, as described above, even if the X stage 21 and the Y stage 71 become immovable at an intermediate position unrelated to the moving end, the relative movement of this intermediate member causes the movement amount of the drive nut 85x (85y) to Since the difference is absorbed, no load is applied to the screwed portion. In the present embodiment, the relative movement amount of the first X moving member 75 and the second X moving member 76 can absorb the position error regardless of the positional relationship between the X drive nut 85x and the X stage 21 in the respective movable ranges. Is set to Similarly, the relative movement amount of the Y stage 71 and the Y moving member 80 is set so that the position error can be absorbed regardless of the positional relationship between the Y drive nut 85y and the Y stage 71 in the respective movable ranges. Yes.

  The reason why a load is applied to the driving force transmission mechanism is not limited to the movement of the X stage 21 and the Y stage 71. The CCD 60, which is an optical element for shake correction, is supported so as to be movable in the X-axis and Y-axis directions. Therefore, when the digital camera 200 is dropped and a large external force is momentarily applied, it is driven by the motors 170x and 170y. Although no force is applied, the moving force may act on the X stage 21 holding the CCD 60 and the Y stage 71. The image blur correction apparatus according to the present embodiment can reliably absorb a load and an impact even in such a case.

  For example, when the X stage 21 is moved leftward in FIG. 24 by an external force other than the motor driving force, the first X moving member 75 is pressed in the same direction via the transmission roller 21c. Since this pressing direction is a direction in which the position restricting flanges 75a and 75b are separated from the position restricting flanges 76a and 76b, the first X moving member 75 can move independently while resisting the urging force of the tension coupling spring 81x. it can. At this time, only the elastic tensile force by the tension coupling spring 81x acts on the second X moving member 76, and the first X moving member 75 does not mechanically press the second X moving member 76. An excessive force is not applied from the second X moving member 76 to the X drive nut 85x. Further, when the X stage 21 is moved to the left in FIG. 24 by an external force, the transmission roller 21c is moved in a direction away from the interlocking protrusion 75g, and therefore the first X moving member 75 and the second X moving member 76 are moved. In any case, the moving force of the X stage 21 is not affected. In other words, even if the X stage 21 moves in either the forward or reverse direction by an external force or the like with the X-axis drive motor 170x stopped, an unreasonable force is applied to the screwed portion of the X drive nut 85x and the feed screw 171x. There is no.

  Further, when the Y stage 71 is moved downward in FIG. 24 by an external force other than the motor driving force, the pressing direction is a direction for separating the position restricting flanges 80a and 80b from the position restricting flanges 71c and 71d. The stage 71 can move alone while resisting the urging force of the tension coupling spring 81y. At this time, only the elastic tensile force by the tension coupling spring 81y acts on the Y moving member 80, and the Y stage 71 does not mechanically press the Y moving member 80. An excessive force is not applied to the Y drive nut 85y that is in contact with the Y drive nut 85y. In addition, when the Y stage 71 is moved upward in FIG. 24 by an external force, the Y moving member 80 is pressed upward by the contact relationship between the position restricting flanges 80a and 80b and the position restricting flanges 71c and 71d. This moving direction is a movement in a direction in which the nut abutting portion 80e moves away from the Y drive nut 85y, so that no moving force is applied to the Y drive nut 85y. In other words, even if the Y stage 71 moves in the forward or reverse direction due to an external force or the like with the Y-axis drive motor 170y stopped, an unreasonable force is applied to the threaded portion of the Y drive nut 85y and the feed screw 171y. There is no.

  As described above, in the image shake correction apparatus of the present embodiment, the X stage 21 and the Y stage 71 move unexpectedly due to an external force or the like when there is a movement failure of the X stage 21 or the Y stage 71 when the motor is driven. In any case, the moving force can be absorbed to prevent the drive mechanism from being damaged. In particular, since the load is not applied to the screwed portions of the drive nuts 85x and 85y and the feed screws 171x and 171y, the screw screwed portion is highly effective in preventing damage. Although the X stage 21 and the Y stage 71 can be driven with high accuracy by reducing the lead of the feed screws 171x and 171y, reducing the lead of the feed screw is disadvantageous in terms of strength. However, according to the configuration of the present embodiment, there is no possibility that a load is applied to the screwed portion, so that the leads of the feed screws 171x and 171y can be reduced.

  26 to 28 show another embodiment of the shake correction unit IS. In FIG. 26 to FIG. 28, the same reference numerals are given to members common to the above embodiments. This other embodiment is different from the above embodiment only in that one end of the X stage biasing spring 87x is engaged with the Y stage 71 instead of the fixed holder 23. That is, the X stage biasing spring 87 x is stretched between the spring hooking protrusion 21 v of the X stage 21 and the spring hooking protrusion 71 w of the Y stage 71. In this aspect, the same effect as the first embodiment can be obtained.

  In the above embodiment, the CCD 60 is unitized together with the low-pass filter 25 and the like, and this CCD unit is driven at the time of image blur correction. The detailed structure of the CCD unit is shown in FIG.

  As shown in FIGS. 29 to 34, the low-pass filter 25 and the CCD 60 are sandwiched between the X stage 21 and the CCD holding plate 61. More specifically, the low-pass filter 25 contacts the inside of the front end opening of the X stage 21, and the imaging surface of the CCD 60 is located on the back side of the low-pass filter 25 with the packing 26 interposed therebetween. The packing 26 is made of an elastically deformable material. The CCD 60 is fixed to the front surface of the CCD pressing plate 61 together with the CCD substrate 62. The CCD substrate 62 is extended to the rear side of the CCD pressing plate 61 and connected to one end of a flexible substrate 90 for image signal transmission. Yes. The other end of the flexible substrate 90 is connected to a fixed substrate on the control circuit 102 side. The CCD substrate 62 and the flexible substrate 90 are integrally formed.

  The CCD holding plate 61 has a front flat surface portion 61a that supports the CCD 60 and the CCD substrate 62, and three support leg portions 61b that protrude to both sides and a lower portion of the front flat surface portion 61a. The X stage 21 is formed with three concave portions 21d each having a shape to which the three support leg portions 61b fit. Each of the three support legs 61b of the CCD holding plate 61 is formed with a circular through hole 61c that penetrates in the front-rear direction. Three nuts 63 are fixed to the three recesses 21 d of the X stage 21 at positions facing the through holes 61 c, and spring accommodating holes 21 e are formed at positions adjacent to the nuts 63. A compression coil spring 64 is housed in the spring housing hole 21e. In addition, positioning holes 61d are formed in the two support legs 61b on both sides of the front plane portion 61a so as to be positioned below the through holes 61c. The two recesses 21d of the X stage 21 are respectively provided with the positioning holes 61d. A positioning protrusion 21f that can be fitted into the positioning hole 61d is provided.

  The three nuts 63 are metal members that are separate from the X stage 21, and are fixed in a state where the large-diameter flange portion 63 b is engaged with the large-diameter hole 21 g on the front side of the X stage 21. The cylindrical shaft portion 63a of the nut 63 passes through the bottom of the large-diameter hole 21g and protrudes rearward in the optical axis direction from the bottom surface of the recess 21d. As shown in FIGS. 35 and 36, the outer diameter size of the cylindrical shaft portion 63a of each nut 63 is set smaller than the inner diameter (opening diameter) of the through hole 61c. A screw hole 63c is formed in the axial direction of the cylindrical shaft portion 63a, and the CCD adjustment screw 65 is screwed into the screw hole 63c from the tip end side (backward in the optical axis direction) of the cylindrical shaft portion 63a. Can be combined. The CCD adjustment screw 65 has a screw shaft portion 65a having a male screw screwed into the screw hole 63c, and a head portion 65b having a diameter larger than that of the screw shaft portion 65a. Contrary to the cylindrical shaft portion 63a, the outer diameter of the head portion 65b is set larger than the inner diameter size (opening diameter) of the through hole 61c.

  When assembling the CCD unit, with the compression coil spring 64 being compressed and inserted into the three spring housing holes 21e, the three support leg portions 61b are respectively inserted into the corresponding recesses 21d and the CCD holding plate 61 The X stage 21 is approached. Then, the pair of positioning projections 21f are engaged with the positioning holes 61d, and the relative positions of the X stage 21 and the CCD 60 are determined. Further, as described above, since the outer diameter of the cylindrical shaft portion 63a of each nut 63 is smaller than the inner diameter (opening diameter) of the corresponding through hole 61c, when the CCD pressing plate 61 and the X stage 21 are brought close to each other, the cylindrical shape. The distal end portion of the shaft portion 63a enters the through hole 61c.

  Subsequently, the screw shaft portion 65 a of the CCD adjustment screw 65 is screwed into the screw hole 63 c of each nut 63. When the X stage 21 and the CCD holding plate 61 are brought close to each other, the compression coil spring 64 inserted into the recess 21d is compressed between the support leg portion 61b, and the CCD holding plate 61 is separated from the X stage 21 by its restoring force. It is pressed in the direction (backward in the optical axis direction) (FIG. 37). However, since the movement of the CCD pressing plate 61 in the same direction is restricted by the back surfaces of the heads 65b of the three CCD adjustment screws 65, the position of the CCD pressing plate 61 in the optical axis direction is defined. That is, the X stage 21 and the CCD holding plate 61 are coupled with the CCD 60 and the low-pass filter 25 sandwiched therebetween.

  In the CCD unit in which the X stage 21 and the CCD holding plate 61 are coupled, the CCD adjustment screws 65 are dispersedly arranged at three positions around the center of the imaging surface of the CCD 60. By changing the tightening amount, it is possible to change the angle of the CCD pressing plate 61, that is, the CCD 60 imaging surface with respect to the photographing optical axis Z1. For example, when the tightening amount of the CCD adjustment screw 65 is increased, the position of the head 65b that defines the position of the CCD pressing plate 61 in the optical axis direction is displaced forward, so that the CCD in contact with the CCD adjustment screw 65 with the increased tightening amount is provided. The support leg 61b of the pressing plate 61 is pushed forward. On the contrary, when the tightening amount of the CCD adjustment screw 65 is reduced, the position of the head 65b is displaced rearward in the optical axis direction, so that the support leg portion 61b of the CCD pressing plate 61 in contact with the CCD adjustment screw 65 having the reduced tightening amount is provided. Then, it is pushed backward by the biasing force of the compression coil spring 64. By changing the tightening balance of the three CCD adjustment screws 65, the tilt angle of the CCD 60 with respect to the photographing optical axis Z1 can be freely changed.

  FIG. 33 and FIG. 34 are cross-sectional views showing a case where the tightening adjustment of two CCD adjustment screws 65 located on the left and right sides of the front flat surface portion 61a among the three CCD adjustment screws 65 is performed. FIG. 33 shows a state where the tightening amounts of the left and right CCD adjusting screws 65 are substantially equal and the adjusting screw 65 is not tightened to the maximum tightening position (tightening end position) in the screw hole 63c. The peripheral structure of one CCD adjustment screw 65 at this time is shown enlarged in FIG. As can be seen from the figure, the supporting leg portion 61b of the CCD pressing plate 61 is brought into contact with the back surface of the head portion 65b by the urging force of the compression coil spring 64, but between the front end portion of the cylindrical shaft portion 63a and the head portion 65b. Since there is a space, there remains room for further tightening the CCD adjustment screw 65 to move the head 65b and the support leg 61b forward.

  FIG. 34 shows a state where the CCD adjustment screw 65 on the left side in the drawing is tightened to the maximum tightening position. As can be seen from FIG. 36 in which the vicinity of the CCD adjustment screw 65 is enlarged, the support leg portion 61 b that contacts the CCD adjustment screw 65 is pushed forward against the urging force of the compression coil spring 64, and the CCD pressure plate 61 and the CCD 60. Is tilted. At this time, the X stage 21 is not tilted, but the tilt on the CCD 60 side is absorbed by elastic deformation of the packing 26 in contact with the CCD 60 (see FIG. 34).

  As shown in FIG. 36, since the cylindrical shaft portion 63a of the nut 63 is inserted into the through hole 61c of the CCD pressing plate 61, the head 65b of the CCD adjustment screw 65 is at the tip of the cylindrical shaft portion 63a. It can be tightened until it abuts. At this time, the support leg 61b of the CCD pressing plate 61 is not sandwiched between the head 65b of the CCD adjustment screw 65 and the bottom surface of the recess 21d of the X stage 21, and is not in contact with the bottom surface of the recess 21d. Kept in a state. Since the support leg 61b is not clamped, the tilting of the CCD pressing plate 61 is prevented even at the position of the CCD adjusting screw 65 in the maximum tightened state when the tightening amount of the other CCD adjusting screw 65 is changed. There is no. That is, the entire screwing range of the screw shaft portion 65a of the CCD adjusting screw 65 and the screw hole 63c of the nut 63 can be used as the CCD tilt adjusting range.

“Description of the Characteristic Parts of the Present Invention”
In the CCD unit, after the X stage (holding member) 21 and the CCD pressing plate (imaging element fixing member) 61 are coupled, as shown in FIGS. 31 and 32, a movable plate (movable It is completed by attaching a flexible substrate supporting member) 91. The movable plate 91 is a plate-like member that is substantially parallel to a moving plane of the CCD (imaging device) 60, that is, a plane including the X axis and the Y axis. The X stage 21 is formed with a pair of locking holes 21h, a screw hole 21i, and a positioning projection 21k. The movable plate 91 has a pair of retaining arm portions 91a that engage with the pair of locking holes 21h. A through hole 91b and a positioning hole 91c are formed. With the distal ends of the pair of retaining arms 91a engaged with the corresponding locking holes 21h and the positioning protrusions 21k engaged with the positioning holes 91c, the movable plate fixing screw 92 is inserted into the screw hole 21i through the through hole 91b. The movable plate 91 is fixed to the X stage 21 by being screwed onto the X stage 21 (FIG. 32).

  This CCD unit is supported by the aforementioned drive mechanism so as to be movable in the X-axis direction and the Y-axis direction, thereby constituting a shake correction unit IS. The shake correction unit IS has a fixed cover (rear protection member) 93 that covers and protects the back side thereof. The fixed cover 93 is a plate-like member that is substantially parallel to a moving plane of the CCD 60, that is, a plane including the X axis and the Y axis, and is substantially parallel to the movable plate 91. As shown in FIG. 29, the fixed cover 93 has four through holes 93a distributed in the vicinity of the outer edge, and an annular contact surface 93b is formed around each through hole 93a. The four contact surfaces 93b are located on substantially the same plane. The fixed cover 93 is formed with three access holes 93c and two positioning holes 93d.

  8 and 9 show the shake correction unit IS in a state where the movable plate 91 and the fixed plate 93 are removed. As can be seen from FIG. Four screw holes 23c are formed in a positional relationship corresponding to the holes 93a, and contact surfaces 23d with which the positioning holes 93d can abut are formed around the screw holes 23c. The fixed holder 23 also has two positioning protrusions 23e that can be engaged with the positioning holes 93d of the fixed cover 93.

  When the fixed cover 93 is attached to the fixed holder 23, the two positioning protrusions 23e are engaged with the positioning holes 93d, respectively. Then, the four contact surfaces 93b abut against the corresponding contact surfaces 23d, and the four through holes 93a and the four screw holes 23c are positioned so as to overlap each other. Then, the fixing cover 93 is fixed to the fixing holder 23 as shown in FIG. 38 by screwing and tightening the cover fixing screws 94 to the screw holes 23c through the respective through holes 93a. As can be seen from FIG. 38, with the movable plate 91 and the fixed cover 93 attached, the heads 65b of the three CCD adjustment screws 65 are exposed through the access holes 93c, and the movable plate 91 and the fixed plate 93 are removed. Therefore, the above-described tilt adjustment operation of the CCD 60 can be performed.

  The control circuit 102 is provided on a fixed substrate in the camera. As described above, the fixed substrate on the control circuit 102 side and the CCD substrate 62 on the CCD 60 side are connected by the flexible substrate 90. As shown in FIGS. 2, 3, 12, and 40, the flexible substrate 90 includes a CCD side fixing portion 90 a integrated with the CCD substrate 62 on the back side of the CCD pressing plate 61, and a CCD side fixing portion 90 a. A U-shaped folded portion 90v1 folded upward at the lower end, a first vertical linear portion 90b extending upward along the Y axis from the folded portion 90v1, and a first vertical linear portion 90b A bent portion 90v2 bent forward at a substantially right angle, a first folded straight portion 90c extending forward from the folded portion 90v2 and passing through the upper portion of the zoom motor 150, and a first folded straight line A U-shaped folded portion 90v3 that is folded back about 180 degrees from the folded portion 90c, a second folded linear portion 90d that extends backward from the folded portion 90v3, and the second folded linear portion 90d. Bend downward at a substantially right angle A bent portion 90v4, a second vertical straight portion 90e extending downward from the bent portion 90v4, and a lateral extension from the lower end of the second vertical straight portion 90e along the X axis The laterally extending portion 90f and the connector portion 90g connected to the fixed substrate on the control circuit 102 side are provided. The first vertical linear portion 90b and the second vertical linear portion 90e are substantially parallel to each other, and the longitudinal direction thereof is substantially parallel to the Y axis. Further, the first folded linear portion 90c and the second folded linear portion 90d are substantially parallel to each other, and the longitudinal direction thereof is substantially parallel to the photographing optical axis Z1. 8, 9, 19, 21, and 23, the illustration of the flexible substrate 90 and the CCD substrate 62 is omitted, and the back side of the front flat portion 61 a of the CCD pressing plate 61 is shown. Yes.

  As shown in FIG. 40, the movable plate 91 is fixed to the X stage 21 so as to be spaced apart from the front flat portion 61 a of the CCD pressing plate 61 in the optical axis direction, and between the CCD pressing plate 61 and the movable plate 91. A flexible substrate insertion space S1 is formed in the upper portion. A flexible board insertion space S2 is also formed between the fixed cover 93 and the LCD 20 located behind the fixed cover 93. The flexible substrate 90 has a folded portion 90v1 positioned in the flexible substrate insertion space S1, and a CCD-side fixed portion 90a and a first vertical linear portion 90b are disposed at front and rear positions sandwiching the flexible substrate insertion space S1. . The CCD side fixing portion 90 a is fixed to the rear surface side of the CCD pressing plate 61. One first vertical straight portion 90b is in contact (surface contact) with the front surface of the movable plate 91 and is guided by the movable plate 91 so as to extend from the folded portion 90v1 side to the bent portion 90v2 side. The second vertical linear portion 90e and the laterally extending portion 90f that extend to the rear of the first vertical linear portion 90b through the first folded linear portion 90c and the second folded linear portion 90d are a board insertion space. It extends in S <b> 2 and is supported on the rear surface of the fixed cover 93. A portion of the second vertical linear portion 90e and the side extending portion 90f are fixed to the rear surface of the fixed cover 93 using means such as double-sided tape.

  In this flexible substrate arrangement structure, a movable plate 91 is provided at a position in the optical axis direction sandwiched between a CCD holding plate 61 on which one end portion (CCD substrate 62) of the flexible substrate 90 is supported and a fixed support portion by a fixed cover 93. ing. As can be seen from FIG. 40, the flexible substrate 90 is supported and fixed to the rear surface side of the fixed cover 93 in the optical axis direction, but the movable plate 91 covers the extension region of the flexible substrate 90 on the front surface side of the fixed cover 93. The contact between the flexible substrate 90 and the fixed cover 93 is prevented. That is, the movable plate 91 functions as a protective member that prevents the flexible substrate 90 from coming into contact with a fixed member such as the fixed cover 93 or the fixed holder 23 except in a fixed region on the rear surface side of the fixed cover 93. In general, when the flexible substrate elastically deforms following the movement of the movable member and comes into contact with the fixed member, there is a risk that friction may occur and an operating resistance may be generated. However, the movable plate 91 is provided to contact the fixed member. By preventing this, the generation of friction can be suppressed. A part of the first vertical linear portion 90 b of the flexible substrate 90 is in surface contact with the front surface of the movable plate 91 with respect to the movable plate 91. Since the movable plate 91 is a movable member that is driven integrally with the CCD 60 in the X-axis and Y-axis directions, when the CCD 60 is driven during image blur correction, the first vertical linear portion 90b and the movable plate 91 are in this contact area. There is no extra friction between the two. As described above, the movable plate 91 functions as a movable support member that gives bending resistance to the flexible substrate 90 without causing friction in addition to the function as a protective member that prevents the fixed member and the flexible substrate 90 from contacting each other. Therefore, the stability of the flexible substrate 90 is improved, and more accurate driving can be realized with less load.

  Further, when the tilt adjustment of the CCD 60 described above is performed, the CCD pressing plate 61 is tilted with respect to the X stage 21 and the movable plate 91. When the holding angle of the CCD holding plate 61 is changed, a force for twisting the flexible substrate 90 is exerted via a fixing portion with the CCD holding plate 61. Since the flexible substrate 90 itself has flexibility, it can be accommodated by elastic deformation. However, when the elastic deformation portion comes into contact with other fixing members, the CCD 60 moves during image blur correction driving. When the flexible substrate 90 is caused to follow, an excessive load may be generated. In the flexible substrate arrangement structure of the present embodiment, when the inclination of the CCD 60 is adjusted, the folded portion located in the flexible substrate insertion space S1 between the CCD pressing plate 61 and the movable plate 91 as shown in FIG. Although 90v1 is twisted and elastically deformed, the first vertical linear portion 90b following the folded portion 90v1 is supported in surface contact with the front surface side of the movable plate 91, and therefore is ahead of the first vertical linear portion 90b. The twist of the flexible substrate 90 in the region is suppressed. In other words, the inclination of the CCD pressing plate 61 is adjusted in the space between the X stage 21 and the movable plate 91, and the flexible substrate 90 coming out of the CCD 60 is opposed to the CCD pressing plate 61 in the movable plate 91. I support it on the surface side. As a result, the twist of the flexible board caused by the tilt adjustment of the CCD 60 is absorbed in the CCD unit (folded portion 90v1) sandwiched between the X stage 21 and the movable plate 91, and the area of the flexible board 90 that extends outside the CCD unit. Therefore, there is no deformation that causes a moving load. That is, even if the inclination of the CCD 60 is adjusted, the drive accuracy of the CCD unit is not affected.

  The fixed cover 93 also has a function of protecting the LCD flexible substrate 20a extended from the LCD 20 against the movable shake correction unit IS. As shown in FIG. 40, the LCD flexible substrate 20 a extending from the lower portion of the LCD 20 is bent upward and extends into the flexible substrate insertion space S <b> 2 between the fixed cover 93 and the LCD 20. As shown in FIG. 41, the flexible substrate for LCD 20a is extended sideways along the back surface of the fixed cover 93, and the front end thereof is connected to the control circuit 102, although not shown. With this configuration, when the shake correction unit IS is driven in the X-axis and Y-axis directions during image shake correction, it is possible to prevent the movable portion from interfering with the LCD flexible substrate 20a.

  42 and 43 show different embodiments of the present invention. In this embodiment, a part of the arrangement structure of the flexible substrate 190 is different from the previous embodiment. Description of parts common to the previous embodiment is avoided, and reference numerals in the drawings are also common.

  As shown in FIG. 42, the flexible substrate 190 includes a CCD-side fixing portion 190a integrated with the CCD substrate 62 on the back surface side of the CCD pressing plate 61, and a U-side where the lower end portion of the CCD-side fixing portion 190a is folded upward. A bent portion 190v1, a vertical straight portion 190b extending upward from the folded portion 190v1 along the Y axis, and a bent portion obtained by bending the upper end portion of the vertical straight portion 190b forward at a substantially right angle. Portion 190v2, a first folded linear portion 190c extending forward from the bent portion 190v2 and passing through the upper portion of the zoom motor 150, and a U-shape obtained by folding the first folded linear portion 190c backward about 180 degrees A folded portion 190v3 and a second folded linear portion 190d extending rearward from the folded portion 190v3. Up to the second folded linear portion 190d is the same as the flexible substrate 90 of the previous embodiment, but the tip is different. The rear end portion of the second folded linear portion 190d is folded forward by about 180 degrees to form a U-shaped folded portion 190v4. The folded portion 190v4 extends over the upper surface of the support plate 193 located above the zoom motor 150, and is supported on the upper surface portion of the support plate 193 following the folded portion 190v4. Is formed. As shown in FIG. 43, a laterally extending portion 190f extending laterally along the X axis is formed following the upper surface support portion 190e, and a connector connected to the fixed substrate 102a on the control circuit 102 side at the tip thereof. A portion 190g is formed. At least a part of the upper surface support portion 190e and the laterally extending portion 190f is fixed on the support plate 193 by means such as double-sided tape.

  The flexible substrate 190 is different from the previous embodiment in that the flexible substrate 190 is not fixed to the rear fixed cover 93 and extends to the upper support plate 193 side. However, as in the previous embodiment, the movable plate 91 serves as a protective member that prevents the flexible substrate 190 from coming into contact with a fixed member such as the fixed holder 23 in the region until the flexible substrate 190 receives the support of the support plate 193. They are common in functioning. Therefore, by providing the movable plate 91, it is possible to suppress the generation of harmful friction that occurs between the flexible substrate 190 and other fixed members during image blur correction.

  As mentioned above, although this invention was demonstrated based on illustration embodiment, this invention is not limited to this. For example, the flexible substrates 90 and 190 according to the embodiment include a front extending portion including first folded linear portions 90c and 190c and second folded linear portions 90d and 190d, and the forward extending portions are driven by the CCD 60. This contributes to a reduction in operating resistance at the time, but in the flexible substrate arrangement structure of the present invention, it is possible to omit such a forward extending portion.

It is a front view of the digital camera which is embodiment of this invention. It is a sectional side view in the imaging state of the digital camera. FIG. 2 is a side cross-sectional view of the digital camera in a lens barrel storage state. It is a perspective view of the zoom lens barrel in the storage state of the digital camera. It is a disassembled perspective view of a part of zoom lens barrel. It is a disassembled perspective view of a different part of a zoom lens barrel. It is a front perspective view of a shake correction unit constituting the image shake correction apparatus. It is a rear perspective view of the shake correction unit in a state where the movable plate and the fixed cover are removed. FIG. 9 is a rear perspective view of a shake correction unit having a different angle from FIG. 8. It is a disassembled perspective view of a shake correction unit. It is the disassembled perspective view which expanded and showed the fixed holder vicinity in a shake correction unit. It is a front perspective view of the state which decomposed | disassembled the X stage, CCD, and the CCD pressing board. It is a back perspective view of a CCD unit in a state where a flexible substrate and a movable plate are removed. It is a front perspective view which shows the decomposition | disassembly state of a 1st X moving member and a 2nd X moving member. It is a back perspective view showing the disassembly state and assembly state of the 1st X movement member and the 2nd X movement member. It is a front perspective view which shows the decomposition | disassembly state of a Y moving member and a Y stage. It is a back perspective view which shows the decomposition | disassembly state and assembly state of a Y moving member and a Y stage. It is a front perspective view of the state where the fixed holder is removed from the shake correction unit. It is the back perspective view. FIG. 4 is a front perspective view of a state in which a drive motor, a photo interrupter, and an urging spring are further removed from the shake correction unit. It is the back perspective view. It is a front perspective view of a state where the second X moving member and the Y moving member are further removed from the shake correction unit. It is the back perspective view. It is a figure which shows typically the structure of a shake correction unit. It is a block diagram which shows the main electric circuit structures of the digital camera of FIG. 1 thru | or FIG. It is a front perspective view which shows another embodiment of a shake correction unit. It is the back perspective view. It is a figure which shows typically the shake correction unit of another form of FIG.26 and FIG.27. It is a disassembled perspective view of a CCD unit. It is a disassembled perspective view of the CCD unit seen from the back. FIG. 4 is a rear perspective view of the CCD unit in a state where an X stage and a CCD pressing plate are fixed. FIG. 32 is a rear perspective view of a state where the movable plate is further fixed from the state of FIG. 31 to complete the CCD unit. FIG. 3 is a cross-sectional view of an image shake correction unit before adjusting a CCD tilt. FIG. 3 is a cross-sectional view of an image shake correction unit in a state in which the inclination of the CCD is adjusted. It is sectional drawing which expanded and showed the periphery of one adjustment screw among the two adjustment screws shown in FIG. It is sectional drawing which expanded and showed the periphery of one adjustment screw among the two adjustment screws shown in FIG. It is sectional drawing of an image blur correction unit which shows the cross-sectional position which passes along the compression coil spring of a CCD unit. It is a back perspective view of the shake correction unit in a state where a movable plate and a fixed cover are attached. FIG. 5 is a rear perspective view of a shake correction unit that is shown with a part of the fixed cover cut away. It is a longitudinal cross-sectional view of a part of the shake correction unit, showing the arrangement structure of the flexible substrate coming out of the CCD. It is a perspective view which shows the relationship between the flexible substrate for LCD extended from LCD, and a fixed cover. It is a sectional side view of a lens barrel storage state of a digital camera which is another embodiment with a different flexible substrate arrangement structure. FIG. 43 is a perspective view of a zoom lens barrel and an LCD unit in the digital camera of FIG. 42.

Explanation of symbols

8 Second group lens moving frame 10 Second group linear guide ring 11 Cam ring 12 Third feed cylinder 13 Second feed cylinder 14 Straight guide ring 15 First feed cylinder 18 Helicoid ring 20 LCD
20a LCD flexible substrate 21 X stage (holding member)
21a Guide hole 21b Guide groove 21c Transmission roller 21d Recess 21e Spring storage hole 21f Positioning protrusion 21g Large diameter hole 21h Locking hole 21i Screw hole 21k Positioning protrusion 21v Spring hook protrusion 22 Fixed ring 23 Fixed holder 23a Retraction cam protrusion 23bx 23by Motor bracket 23c Screw hole 23d Abutting surface 23e Positioning projection 23vx 23vy Spring hook projection 25 Low pass filter 26 Packing 28 Zoom gear 60 CCD (imaging device)
61 CCD holding plate (Imaging element fixing member)
61a Front plane portion 61b Support leg portion 61c Through hole 61d Positioning hole 62 CCD substrate 63 Nut (tilt adjustment mechanism)
63a Cylindrical shaft portion 63b Flange portion 63c Screw hole 64 Compression coil spring (tilt adjustment mechanism)
65 CCD adjustment screw (tilt adjustment mechanism)
65a Screw shaft portion 65b Head 71 Y stage 71a 71e Guide hole 71b Guide groove 71c 71d Position regulating flange 71f Guide pin 71g 71v 71w Spring hooking projection 71h Position detecting portion 72 74 X guide rod 77 78 X guide rod 73 79 Y guide rod 75 1X moving member 75a 75b Position restricting flange 75c 75d 75e Guide hole 75f Guide pin 75g Interlocking protrusion 75h Spring hooking protrusion 75i Position detecting portion 76 2X Moving member 76a 76b Position restricting flange 76c Guide pin 76d Guide hole 76e Nut abutting portion 76f Straight groove 76g Spring hooking protrusion 80 Y moving member 80a 80b Position regulating flange 80c Guide pin 80d Guide hole 80e Nut abutting portion 80f Straight groove 80g Spring hooking protrusion 81x 81y Tensile coupling spring 8 x X drive nut 85y Y drive nut 87x X stage biasing spring 87y Y stage biasing spring 89x 89y Nut biasing spring 90 Flexible substrate 90a CCD side fixing part 90b First vertical linear part 90c First folding linear part 90d First 2 fold linear portion 90e second vertical rectilinear part 90f side extending portion 90g connector portion 90v1 90v3 folded portion 90v2 90v4 bent portion 91 movable plate (flexible substrate support member)
91a Stop arm portion 91b Through hole 91c Positioning hole 92 Movable plate fixing screw 93 Fixed cover (rear protection member)
93a Through hole 93b Contact surface 93c Access hole 93d Positioning hole 94 Cover fixing screw 100 Shutter unit 101 Main switch 102 Control circuit 103 104 Photo interrupter 105 X gyro sensor 106 Y gyro sensor 107 Shooting mode changeover switch 170x X axis drive motor 170y Y Axis drive motor 171x Feed screw 171y Feed screw 190 Flexible substrate 190a CCD side fixing portion 190b Vertical straight portion 190c First folded straight portion 190d Second folded straight portion 190e Upper surface support portion 190f Side extending portion 190g Connector portion 190v1 190v3 190v4 Folding part 190v2 Bending part 200 Digital camera 201 Zoom lens barrel 202 Camera body IS Shake correction unit LG1 First lens group LG2 Second lens group The third lens group G3 S1 S2 flexible board insertion space Z0 lens barrel axis Z1 photographing optical axis

Claims (9)

An imaging device movable in a plane perpendicular to the optical axis;
A flexible substrate extending from the imaging device;
A movable flexible substrate support member that is positioned rearward in the optical axis direction of the image pickup device, is moved in the direction orthogonal to the optical axis together with the image pickup device, and has a flexible substrate extending from the image pickup device along a surface on the image pickup device side When,
An imaging device comprising: 2. The imaging apparatus according to claim 1, wherein the movable flexible substrate support member is a plate-like member substantially parallel to a moving plane of the image sensor, and the flexible substrate coming out of the image sensor is the image sensor of the movable flexible substrate support member. An imaging device in surface contact with the side surface. The imaging apparatus according to claim 1 or 2 wherein, in the optical axis direction rear of the flexible substrate support member of the movable and has an image pickup apparatus having a backward protection member covering the back of the imaging element. The imaging apparatus according to claim 3, wherein the imaging device portion of the flexible substrate is fixed to the rear protective member. 5. The imaging device according to claim 4, wherein the rear protection member is a plate-like member substantially parallel to a moving plane of the imaging element, and the flexible substrate is on a surface opposite to the flexible substrate support member facing side of the rear protection member. Fixed,
The movable flexible substrate support member is an image pickup device that prevents the flexible substrate coming out of the image pickup element from coming into contact with the rear protection member in a region other than the fixed portion with respect to the rear protection member. The imaging apparatus according to any one of claims 3 to 5, the backward protection member is captured is fixed with respect to the imaging device main unit. 7. The imaging device according to claim 3, further comprising an external display device that faces the outer surface of the imaging device further behind the rear protection member, and exits from the imaging device that exits the external display device. An imaging device in which a flexible substrate different from the flexible substrate extends into a space between the external display device and the rear protection member. The imaging apparatus according to any one of claims 1 to 7,
An image sensor fixing member to which the image sensor is fixed;
A holding member that holds the imaging element fixing member and is supported so as to be movable along a plane orthogonal to the optical axis;
An inclination adjusting mechanism for changing a holding angle of the image sensor fixing member with respect to the holding member;
With
The movable flexible substrate support member is an imaging device fixed to the holding member. In an imaging apparatus including a flexible substrate that connects an imaging element movable in a plane perpendicular to the optical axis and a fixed substrate,
A rear protective member that is located behind the imaging element in the optical axis direction and to which a part of the flexible substrate is fixed;
A movable flexible substrate that is located in the optical axis position between the rear protective member and the image sensor, is moved in the direction orthogonal to the optical axis together with the image sensor, and the flexible substrate that comes out of the image sensor is placed on the surface on the image sensor side A support member;
An imaging apparatus comprising:

Images