JP2010192749A - Flexible printed circuit board and image blur correcting device using the same, imaging apparatus, and method of fabricating flexible printed circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible printed circuit board which is used for an optical hand shake correction device etc., and connects a device such as an imaging element to a wiring board and a connection member such as a connector provided at a fixed position, in which the load of displacement of the device on the flexible board is lightened. <P>SOLUTION: In an FPC (Flexible Printed Circuit Board) 8 led out from a sensor unit 1 driven to be displaced in two dimensions (x, y), the lead-out portion 81 of the FPC 8 is bent along an optical axis (z), and belt-like portions 84, 85 are extended therefrom to the right and left to form a loop. Leading ends of the belt-like portions 84, 85 are fixed as fixed portions 82, 83 to a support portions 24 of a fixed member 2 with screws 89, and connection portions 86, 87 extending therefrom are connected to another substrate and a connector. The two-dimensional displacement is therefore absorbed by deformation (flexure) of the loop, and the two belt-like portion 84, 85 each decrease the number of lines of itself in spite of an increase in the number of lines due to an increase in th number of pixels, an increase in the number of frames in a second, etc., to reduce problems associated with arrangement space. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flexible printed circuit board suitably used for an image blur correction apparatus that optically corrects an image blur in an imaging apparatus, a method for producing the same, and the image blur correction apparatus and the imaging apparatus.

  The image blur correction device of the imaging device has advantages such as enabling a slow shutter and eliminating the need for a tripod for night shooting. Among them, optical correction is advantageous in terms of resolution and the like compared with electronic correction, and has become the mainstream of image blur correction apparatuses. The optical image blur correction is performed by displacing an optical component such as a correction lens provided in the lens or an imaging element provided in the imaging apparatus main body in a direction orthogonal to the optical axis. In such an image blur correction device, the displaced optical component and the wiring board or connector provided at the fixed position are connected by a flexible printed board, and due to its flexibility, the force load at the time of the displacement is reduced. Mitigation has been done.

  FIGS. 17 and 18 are typical prior arts for performing image blur correction due to camera shake by driving the sensor unit 301 including the image sensor 306 in the x (left and right) and y (up and down) directions perpendicular to the optical axis z. FIG. 17 is a perspective view of the image blur correction unit on the camera body side, FIG. 17 is a perspective view looking up from the lower right of the back surface, and FIG. 18 is a front view. This image blur correction unit is used in a camera in which an imaging lens barrel and a sensor unit 301 are fixed integrally. The sensor unit 301 is moved by an actuator in the x and y directions perpendicular to the optical axis z. Displace. A strip-shaped flexible printed circuit board 302 is drawn upward from the sensor unit 301, folded back from the front, fixed to the base 303, and then drawn backward, and the end 304 is connected to another wiring. Connected to the board or connector. In other words, the flexible printed circuit board 302 is bent with respect to the direction in which the belt-shaped flexible printed circuit board 302 is wound with a degree of freedom corresponding to the movable distance of the image blur correction unit. The flexible printed board 305 drawn upward from the base 303 is for the actuator and does not move.

  Therefore, the displacement of the sensor unit 301 in the y direction is absorbed by the deflection, and the load on driving the sensor unit 301 can be suppressed. However, with respect to the displacement in the x direction, the band-shaped flexible printed circuit board 302 is twisted, resulting in a large load. Here, the image blur correction performance is degraded by the load on the flexible printed circuit board 302. For this reason, if the image pickup device 306 is high-definition, that is, the number of pixels is increased or high-speed reading is performed, that is, the number of frames is increased for a second, the number of lines of the flexible printed circuit board 302 is increased, the width is increased, and the load is increased. There is a problem that it is large, that is, the waist becomes strong and driving becomes difficult. Further, even if the image pickup device 306 is changed from CCD to CMOS, various signal processing circuits can be mounted on the device side in the CMOS, so that the number of lines is drastically increased.

  On the other hand, Patent Document 1 is an image blur correction device on the lens side. A belt-like flexible printed circuit board is drawn from the upper end of an image blur correction unit equipped with a correction lens and connected to a fixed position. At this time, the deflection is set in such a way that the deflection in consideration of the vertical movement amount of the unit and the horizontal movement can be absorbed.

JP 2000-214508 A

  Since Patent Document 1 is image blur correction on the lens side, the number of lines of the flexible printed circuit board is not large, and the width (length in the depth direction) of the band is not a problem. However, if the same method is applied to an apparatus having a large number of lines such as the image blur correction apparatus on the camera body side as described above, the width of the band becomes wide, resulting in a problem of arrangement space.

  An object of the present invention is to reduce a problem of arrangement space with respect to an increase in the number of lines and a flexible printed board capable of reducing a driving load, an image blur correction apparatus using the same, an imaging apparatus, and a flexible printed board. Is to provide a creation method.

  The flexible printed circuit board of the present invention is a flexible printed circuit board for drawing out wiring from a device driven to be displaced in a two-dimensional direction to a fixed position. The flexible printed circuit board is connected to the device and is drawn in a direction substantially orthogonal to the two-dimensional direction. A drawer part, connected to the drawer part, branched into two sets, extending in a direction away from each other, forming a substantially loop, and connecting to the belt part, and being fixed at the fixed position Part.

  According to the above configuration, the image pickup device is used in an optical image blur correction device that mounts an image pickup device and drives the image pickup device to move in a two-dimensional (x, y) direction orthogonal to the optical axis (z). In a flexible printed circuit board that connects between a device such as the image sensor and a connection member such as a wiring board or connector provided at a fixed position, the device has a direction substantially orthogonal to the two-dimensional (optical axis). (Z)) Connect the drawer part drawn in the direction, and it should be noted that by providing a band-like part that branches into two sets of left and right from the drawer part and extends in a direction away from each other to form a substantially loop is there. And the tip of the belt-shaped part becomes a fixed part and is fixed at the fixed position. After being fixed, it is extended to other fixed parts as necessary, or at that position a connector, a wiring board, etc. Connected to. Note that each of the two sets of the band-like portions branched to the left and right may be further divided into a plurality of groups.

  Accordingly, the strips extend in directions away from each other in one of the two dimensions to form a substantially loop including a component in the other dimension of the two dimensions. Two-dimensional displacement is absorbed by deformation (deflection) of the loop. As a result, in the case of an image sensor, for example, as the device, high-definition, that is, increase in the number of pixels, high-speed reading, that is, increase in the number of frames per second, or change of the image sensor from CCD to CMOS, Even if the number increases, the number of lines per set can be reduced by the strips split into the two sets, so that the problem of the arrangement space can be reduced, and the load of the flexible substrate against the displacement of the device can be reduced and driven. The above effect can be reduced. In addition, when the flexible substrate is branched into two sets, since the shape is symmetrical in the branching direction, when the image sensor is displaced, there is little difference in load in the reciprocating displacement direction, and the image blur correction performance is stabilized. be able to.

  In the flexible printed board of the present invention, the fixing portions are stacked on each other and fixed at a common fixing position. Further, the fixing portion extends in a direction substantially orthogonal to the two-dimensional direction and the separating direction. The terminal portions are pulled out with a space therebetween.

  According to the above configuration, the fixed portion provided at the end of the belt-shaped portion that forms the substantially loop and fixed at the fixed position is stacked on the common position, for example, stacked together and screwed with the same screw. Is used. As a result, the fixed position composed of a support piece or the like extending from the base can be shared by two sets of belt-shaped portions.

  Then, when sharing the fixed position between the two sets of belt-shaped parts in this way, from the fixed part that is fixed to the fixed position, the two dimensions extend in a substantially orthogonal direction and are spaced from each other in the separation direction. By opening and drawing out terminal portions connected to connectors and other wiring boards, the terminals can be taken out even when two sets of fixing portions are stacked as described above.

  Furthermore, the flexible printed board of the present invention is formed by slit formation and bending formation from a band-shaped body, both end portions where the slit is not formed become the drawing portion and the fixing portion, respectively, and both side portions of the slit are the above-mentioned portions A boundary between the lead-out part and the fixing part and the belt-like part is folded in a mountain or a valley, and the vicinity of the boundary between the lead-out part and the fixing part is in the slit in the belt-like part. It is characterized in that it is folded at a predetermined angle with respect to a valley or a mountain.

  In addition, in the method for producing a flexible printed circuit board according to the present invention, when creating a flexible printed circuit board for drawing out wiring from a device driven to be displaced in a two-dimensional direction to a fixed position, both ends of the belt-like body are left and slits are formed. Thus, both the end portions where the slits are not formed are the drawer portion and the fixing portion, respectively, and the step between the both side portions of the slit is the strip portion, and the boundary between the drawer portion and the fixing portion and the strip portion, The method includes a step of folding a mountain or a valley, and a step of folding the valley or mountain at a predetermined angle with respect to the slit in the vicinity of the boundary between the drawing portion and the fixing portion in the belt-shaped portion.

  According to said structure, the said flexible printed circuit board is produced from one strip | belt-shaped body (strip) by slit formation and bending formation. Specifically, first, slits are formed in the band-like body while leaving both ends thereof, and the both end portions are used as the lead-out portion and the fixing portion, respectively, and both side portions of the slit parallel to each other in the state are the band-like shape. Part. Next, in forming the belt-like portion in the loop, the boundary between the lead-out portion and the fixing portion and the belt-like portion is folded in a mountain or valley, and then, in the belt-like portion, the lead-out portion and the fixing portion Can be realized by folding the valley or mountain at a predetermined angle with respect to the slit.

  Therefore, a complicated three-dimensional shape having a loop can be created from one strip (strip), and waste when cutting the strip from the material sheet of the flexible printed circuit board is reduced. The number of picks can be dramatically increased and the cost can be reduced. Moreover, since there is one fixing part, one connector can be provided.

  Furthermore, the flexible printed circuit board according to the present invention is characterized in that the predetermined angle is substantially equal between the drawer portion side and the fixed portion side in the belt-like portion on each side of the slit.

  According to said structure, the angle which a strip | belt-shaped part protrudes to the side by the drawer | drawing-out part side, and the angle which protrudes to the side by the fixed part side can be made substantially equal mutually.

  Therefore, the twist of the belt-like portion can be reduced.

  The flexible printed circuit board according to the present invention is characterized in that the predetermined angles are all equal at 45 °.

  According to the above configuration, the left and right belt-like portions protrude equally to the side on both the drawer portion side and the fixed portion side.

  Therefore, the width of the flexible printed circuit board in the direction substantially perpendicular to the two-dimensional direction (depth direction) can be minimized.

  Furthermore, an image blur correction apparatus according to the present invention is an apparatus that optically corrects an image blur by displacing an image sensor in two directions orthogonal to the optical axis. And a fixed position.

  According to said structure, since the influence by the wiring increase of a flexible printed circuit board can be reduced, it is suitable for high definition and high-speed reading of an image pick-up element.

  The image blur correction device according to the present invention further includes a slider that holds the image sensor in a first direction perpendicular to the optical axis, and a slider that can be displaced in a second direction perpendicular to the optical axis. And a stripping direction of the strip portion is parallel to the second direction.

  According to the above configuration, when the image pickup device is optically corrected by displacing the image pickup device in two directions x and y intersecting the optical axis z, the image pickup device is mounted on a slider and the light Holds the slider so that it can be displaced in one of right and left x or up and down y perpendicular to the axis z, and further mounts the slider on a fixed member so that it can be displaced in the other of the left and right x or up and down y. When it implement | achieves by doing, let the separation direction of the said strip | belt-shaped part be parallel to said other direction.

  Therefore, by setting the direction in which the weight of the displacement body is large to the other direction and setting the branching / separating direction of the strip portion of the flexible printed circuit board in that direction, the load on the displacement drive actuator can be reduced, and the actuator as a whole can be reduced. Power can be suppressed.

  Furthermore, an image pickup apparatus according to the present invention is characterized in that the image blur correction apparatus includes a lens unit.

  According to the above configuration, it is possible to increase the definition of the image sensor and to perform high-speed reading.

  As described above, the flexible printed circuit board according to the present invention includes an image pickup device mounted in an image pickup apparatus, and optical image shake for driving the image pickup device in a two-dimensional (x, y) direction orthogonal to the optical axis (z). In a flexible printed circuit board that is used in a correction device or the like and connects between a device such as the image sensor and a connection member such as a wiring board or connector provided at a fixed position, the device includes the two-dimensional It is a belt-like shape that connects a drawer portion that is drawn in a substantially orthogonal direction (optical axis (z)) direction, and that branches into two sets on the left and right sides from the drawer portion and extends away from each other to form a substantially loop. A portion is provided, and the end of the belt-like portion is fixed to the fixing position as a fixing portion.

  Therefore, the band-shaped portion extends in a direction away from each other, which is one dimension of the two dimensions, and forms a substantially loop including a component in the other dimension of the two dimensions. The two-dimensional displacement is absorbed by the deformation (deflection) of the loop. As a result, in the case of an image sensor, for example, as the device, high-definition, that is, increase in the number of pixels, high-speed reading, that is, increase in the number of frames per second, or change of the image sensor from CCD to CMOS, Even if the number increases, the number of lines per set can be reduced by the strips split into the two sets, so that the problem of the arrangement space can be reduced, and the load of the flexible substrate against the displacement of the device can be reduced and driven. The above effect can be reduced.

  Further, the method for producing a flexible printed board of the present invention, as described above, forms slits in the belt-like body, leaving both ends thereof, so that the both end portions are the drawer portion and the fixing portion, respectively. To form both sides of the slits parallel to each other as the belt-like portion and forming the belt-like portion in the loop, the boundary between the lead-out portion and the fixing portion and the belt-like portion is folded into a mountain or a valley, and then In the belt-like portion, the vicinity of the boundary between the drawing portion and the fixing portion is realized by folding a valley or a mountain at a predetermined angle with respect to the slit.

  Therefore, a complicated three-dimensional shape having a loop can be created from a single strip (strip), and waste when cutting the strip from a material sheet of a flexible printed circuit board is reduced. The number of removals can be dramatically increased and the cost can be reduced. Moreover, since there is one fixing part, one connector can be provided.

  Furthermore, as described above, the image blur correction apparatus of the present invention is an apparatus that optically corrects image blur by displacing the image sensor in two directions orthogonal to the optical axis. Used for connection between the image sensor and a fixed position.

  Therefore, the influence of the increase in wiring of the flexible printed circuit board can be reduced, which is suitable for high-definition imaging devices and high-speed reading.

  Furthermore, an image pickup apparatus according to the present invention is characterized in that the image blur correction apparatus includes a lens unit.

  According to the above configuration, it is possible to increase the definition of the image sensor and to perform high-speed reading.

1 is a perspective view of an image blur correction unit that uses a flexible printed circuit board according to an embodiment of the present invention, and is a view looking down from the upper right of the back surface. FIG. 2 is a front view of the image blur correction unit in FIG. 1. FIG. 2 is a rear view of the image blur correction unit in FIG. 1. It is the perspective view which shows the said image blurring correction unit except the said flexible printed circuit board, and is the figure which looked up from the back lower left. FIG. 5 is a view of the image blur correction unit of FIG. FIG. 5 is a view of the image blur correction unit of FIG. FIG. 5 is a view of the image blur correction unit of FIG. FIG. 5 is a view of the image blur correction unit of FIG. 4 slightly looking down from the front right side. FIG. 5 is a view of the image blur correction unit of FIG. It is a perspective view for demonstrating the production method of the flexible printed circuit board concerning one embodiment of the present invention. It is a perspective view for demonstrating the production method of the flexible printed circuit board concerning other forms of implementation of this invention. It is a figure for demonstrating the mode of cutting out from the material sheet | seat of the flexible printed circuit board shown in FIG. It is a figure for demonstrating the mode of cutting out from the material sheet | seat of the flexible printed circuit board shown in FIG. It is the perspective view which looked at the imaging device comprised by providing the imaging lens barrel in the image blur correction unit from the front side. It is the perspective view which looked at the imaging device comprised by providing the imaging lens barrel in the image blur correction unit from the back side. It is a front view which shows typically the flexible printed circuit board of the other form of implementation of this invention. FIG. 2 is a perspective view of an image blur correction unit using a typical conventional flexible printed circuit board, as viewed from the lower right side of the back surface. FIG. 18 is a rear view of the image blur correction unit in FIG. 17.

(Embodiment 1)
1 to 3 are perspective views of an image blur correction unit 100 using a flexible printed circuit board 8 according to an embodiment of the present invention. FIG. 1 is a view from the upper right of the back, and FIG. 2 is a front view. FIG. 3 is a rear view. As shown in FIGS. 15 and 16, the image blur correction unit 100 is used integrally with an imaging lens barrel 200 and used in a camera, and the sensor unit 1 including the imaging element 11 is orthogonal to the optical axis z. By displacing in the x direction and the y direction, image blur is optically corrected.

  4 to 9 are perspective views showing the image blur correction unit 100 excluding the flexible printed circuit board (hereinafter referred to as FPC) 8, FIG. 4 is looking up from the lower left side of the back surface, and FIG. 6 is looking down from the upper right of the back, FIG. 7 is looking down from the upper right of the back, FIG. 8 is looking down slightly from the front right, and FIG. 9 is looking down slightly from the left of the front.

  A fixing member 2 made of a sheet metal product is provided on the front side of the camera body. After the image blur correction unit 100 is assembled, the imaging lens barrel 200 has three screws for the fixing member 2. 31 to 33 and springs 34 to 36 wound around them, and is supported without play, and by adjusting screws 31 to 33 with a hexagon wrench, the optical axis z of the sensor unit 1 and the optical axis of the imaging lens barrel 200 The adjustment is made so that and match. After the adjustment, the screws 31 to 33 are bonded and fixed to the fixing member 2 in order to prevent the screws 31 to 33 from loosening. Light enters from the imaging lens barrel 200 through the opening 21 formed in the fixing member 2 and forms an image on the imaging element 11.

  The sensor unit 1 is roughly sandwiched between the fixing member 2 arranged on the front side of the sensor unit 1 and a slider 4 made of a die cast product and arranged on the back side of the sensor unit 1. In addition, the fixed member 2 can be slidably displaced in the x direction together with the slider 4, and further supported by the slider 4 so as to be slidably displaced in the y direction.

  The image pickup device 11 is composed of a CCD, a CMOS, or the like, and the back side is mounted on a drawer portion 81 (see FIG. 10 described later) of the FPC 8. 4 to 9, for the sake of simplification, the FPC 8 in which a large number of wirings are formed and chip components are appropriately mounted is omitted as described above. The image sensor 11 mounted on the FPC 8 in this manner is further fitted from the back side into a recess 121 formed in the holder 12 made of a resin molded product or the like, and the shield plate 5 made of a sheet metal processed product is screwed 51 to 53. By being screwed to the holder 12, the sensor unit 1 is held and fixed to the holder 12.

  A support portion 54 formed on the upper end portion of the shield plate 5 holds and fixes the lead-out portion 81 of the FPC 8 from the image pickup device 11, and a support portion 24 formed on the upper end portion of the fixing member 2 is provided on the FPC 8. This is for receiving the fixing portions 82 and 83 (see FIG. 10 described later), changing the direction, and extending the image blur correction unit 100.

  First, in order to realize the sliding displacement in the x direction, an ultrasonic linear actuator 22 is provided on the fixed member 2 side. The ultrasonic linear actuator 22 includes a piezoelectric element 221 that expands and contracts in the x direction, a rod 222 that is drawn out from the piezoelectric element 221 in the x direction, and a weight 229. The weight 229 is held and fixed to the fixing member 2 by a bracket 223, one end of the piezoelectric element 221 is bonded to the weight 229, and a rod 222 is bonded to the other end of the piezoelectric element 221. The rod 222 is supported on the fixing member 2 by a pair of brackets 224 so as to be freely expanded and contracted in the x direction. Corresponding to the rod 222, a belt-shaped receiving member 225 having a V-shaped cross section in the x direction is provided on the front side, and on the back side, on the upper end of the slider 4, the x direction is provided. A sliding portion 41 formed by forming a V-groove 411 is provided. An engagement piece 225 a provided on one side of the belt-shaped receiving member 225 is inserted into a recess 421 of a support piece 42 provided adjacent to the sliding portion 41, and the other side of the receiving member 225. The sensor unit 1 is sandwiched between the slider 4 and the fixing member 2 by the spring 61 being wound between the pair of engaging pieces 225 b provided in the section and the hook 43 provided at the upper end of the slider 4. Thus, sliding displacement in the x direction is possible.

  In the ultrasonic linear actuator 22 configured as described above, when the piezoelectric element 221 pushes the rod 222 gently, for example, in the extending direction with the weight 229 as a base, and retracts instantaneously, the support piece 42 is pushed out. By repeating such an operation, the slider 4 and the sensor unit 1 linked thereto are displaced in the extending direction. On the other hand, when the piezoelectric element 221 instantaneously pushes the rod 222 in the extending direction and gently retracts, the support piece 42 is pulled back to the retracted position, and by repeating such an operation, the slider 4 and the link are associated therewith. The sensor unit 1 is displaced in the degenerate direction.

  Next, in order to realize the sliding displacement in the y direction, an ultrasonic linear actuator 13 is provided on the right side of the back surface of the holder 12. Similarly to the ultrasonic linear actuator 22, the ultrasonic linear actuator 13 includes a piezoelectric element 131 that expands and contracts in the y direction, a rod 132 that is drawn out from the piezoelectric element 131 in the y direction, and a weight 139. It is prepared for. The weight 139 is held and fixed to the holter 12 by a bracket 123, one end of the piezoelectric element 131 is bonded to the weight 139, and a rod 132 is bonded to the other end of the piezoelectric element 131. The rod 132 is supported on the holder 12 by a pair of brackets 124 so that the rod 132 can expand and contract in the y direction. Corresponding to the rod 132, a belt-like receiving member 135 having a V-shaped cross section in the y direction is provided on the front side as in the case of the receiving member 225, and the slider 4 is provided on the back side. A sliding portion 44 is provided on the right side of the rear surface. The sliding portion 44 is formed by forming a V groove 441 extending in the y direction. An engaging piece provided on one side of the belt-shaped receiving member 135 is inserted into a recess 451 of a support piece 45 provided adjacent to the sliding portion 44, and the other side of the receiving member 135 is inserted. The sensor unit 1 is supported by the slider 4 and is slid in the y direction by the spring 62 being wound between the pair of engagement pieces 135b provided on the right side and the hook 46 provided on the right side of the back surface of the slider 4. Dynamic displacement is possible. The operation of the ultrasonic linear actuator 13 configured as described above is the same as that of the ultrasonic linear actuator 22 described above. Note that the FPC 80 drawn upward from the fixed member 2 is for the ultrasonic linear actuators 13 and 22 and does not move.

  Thus, one side in the x direction and one side in the y direction of the holder 12 are supported, and a pair of spheres 71 and 72 are provided on the front and rear sides on the side away from these sides. The slider 4 is slidably displaceable. Therefore, a recess 125 for accommodating the spherical body 71 is provided on the front side of the holder 12 facing the fixing member 2, and a recess 126 for accommodating the spherical body 72 is provided on the back side of the holder 12 facing the slider 4. Are formed respectively. The recess 125 is formed in a rectangular shape to allow displacement in the x and y directions on the fixing member 2 of the holder 12, and the recess 126 allows displacement of the holder 12 in the y direction on the slider 4. In order to allow, it is formed in a long hole, so that the holder 12 can be displaced in the x and y directions.

  A plurality of spheres 71 and 72 may be provided on each surface of the holder 12. Further, it is not always necessary to provide a pair on the front and rear surfaces. However, by providing a pair on the front and rear surfaces, the holder 12 can be clamped between the fixing member 2 and the slider 4 with good balance.

  The ultrasonic linear actuators 22 and 13 and the springs 61 and 62 connect one side in the x direction and one side in the y direction between the fixing member 12 and the slider 4, whereas the opposite side is the fixing member. 12 and a hook 49 formed on the slider 4 are connected by a tension of a spring 63. Further, the support member 24 is provided at the upper end of the fixing member 2, and a pair of hooks 291 and 292 are provided at the lower end. These hooks 291 and 292 are provided so that the slider 4 and the sensor unit 1 do not fall off in the optical axis z direction (backward direction) when an impact is applied.

  On the other hand, in order to detect the displacement of the holder 12, a holder 129 is formed on the side of the holder 12 opposite to the side on which the spherical bodies 71 and 72 are provided. A magnet 6 is mounted, and a Hall element 7 that covers the movable range of the holder 129 is provided on the fixed member 2 side correspondingly.

  In the image blur correction unit 100 configured as described above, it should be noted that in the present embodiment, referring to FIGS. 1 to 3, the image sensor 11 and a wiring board or connector provided at a fixed position. In the FPC 8 that connects between connecting members such as the above, the image pickup device 11 includes the drawing portion 81 that is drawn in a direction substantially orthogonal to the two-dimensional (x, y) (optical axis (z)). Connecting and branching from the lead-out portion 81 into two sets on the left and right sides, and providing strip-like portions 84 and 85 that extend away from each other and form a substantially loop. The ends of the strips 84 and 85 become the fixing portions 82 and 83, and are fixed to the support portion 24 of the fixing member 2 by screws 89. The fixed ends become the connecting portions 86 and 87. Connected to a connector or a wiring board.

  FIG. 10 is a perspective view for explaining a method of creating the FPC 8. The FPC 8 is cut out from the material sheet on which the wiring pattern is formed, as shown in FIG. 10A, and is completed by mounting chip components on the back surface of the lead-out portion 81 as shown in FIG. 10A. . After the image pickup device 11 is soldered to the surface, the image pickup device 11 is fitted into the recess 121 of the holder 12 from the back side as described above, and the shield plate 5 is screwed to the holder 12 by screws 51 to 53. The image pickup device 11 is held and fixed to the holder 12 by being attached. The drawing portion 81 is configured by including a mounting portion 81a of the image pickup device 11 and an extending portion 81b drawn from the mounting portion 81a.

  The hole 81c formed in the mounting portion 81a is for the shield plate 5 to directly contact the image pickup device 11 for heat dissipation and grounding, and the shield plate 5 corresponds to the hole 81c by sheet metal processing. Further, a land for soldering the image pickup device 11 is formed around the hole 81c on the surface side of the drawer portion 81. When the shield plate 5 is fixed to the holder 12 on which the image sensor 11 is mounted in this way, the FPC 8 is valley-folded along the fold line 81d, and the extending portion 81b is bonded and fixed to the support portion 54 of the shield plate 5.

  Thereafter, when the assembly of the sensor unit 1 and the slider 4 to the fixing member 2 is completed as described above, the FPC 8 has the band-like portions 84 and 85 extending left and right from the extending portion 81b of the drawer portion 81 as shown in FIG. 3 and is elastically deformed in a loop shape as shown in FIG. 3, and the fixing portions 82 and 83 are fixed to the support portion 24 of the fixing member 2 by screws 89 as shown in FIG.

  With this configuration, the strips 84 and 85 extend in a direction away from each other, which is one dimension (x) of the two dimensions (x, y), and the two dimensions (x, y). ) In the other dimension (y) direction is formed, so that the two-dimensional displacement of the sensor unit 1 can be absorbed by the deformation (deflection) of the loop. Thereby, even if the number of lines of the FPC 8 increases due to high definition of the image sensor, that is, increase in the number of pixels, high speed readout, that is, increase in the number of frames per second, or change from the CCD of the image sensor to CMOS, The strips 84 and 85 branched into the two sets can reduce the number of lines per set, thereby reducing the problem of the arrangement space, reducing the load on the FPC 8 with respect to the displacement of the sensor unit 1, and driving. The impact can also be reduced.

  The sensor unit 1 is displaced in the y direction with respect to the slider 4, whereas the slider 4 on which the sensor unit 1 is mounted is displaced in the x direction with respect to the fixed member 2. Therefore, the load applied to the ultrasonic linear actuator 22 that performs displacement in the x direction is greater than the load of the ultrasonic linear actuator 13 that performs displacement in the y direction due to the weight of the driven portion. On the other hand, in the loop formed by the strips 84 and 85, the curvature of the loop hardly changes with respect to the movement of the sensor unit 1 in the x direction (separation direction), but the curvature changes with respect to the movement in the y direction. Therefore, the resistance due to the deflection of the FPC 8 is larger in the y direction. Therefore, by setting the branching / separating direction of the belt-like portion of the FPC 8 in the direction in which the weight of the driven portion is large (x direction), the load on the actuators 13 and 22 can be reduced, and the power of the actuators 13 and 22 as a whole is reduced. Can be suppressed. In particular, by forming the loop formed by the strips 84 and 85 in a bilaterally symmetric shape, the difference in load on the actuators 13 and 22 with respect to the displacement of the sensor unit 1 in the vertical and horizontal directions can be reduced. it can. In general, the performance of the two actuators 13 and 22 is matched to the one with a larger load. As a result, the load on the actuators 13 and 22 can be reduced, and the power of the actuators 13 and 22 can be suppressed as a whole. In addition, by forming the loop formed by the strips 84 and 85 in a symmetrical shape, the difference in load with respect to the displacement in the left and right reciprocal direction of the sensor unit 1 is small, and the image blur correction performance is stabilized. Can do.

  Furthermore, in the FPC 8, the ends of the fixing portions 82 and 83 extend in a direction substantially orthogonal to the two-dimensional (x, y) (optical axis z direction) and are spaced apart from each other in the separation direction (x). Since the connecting portions 86 and 87, which are terminal portions connected to the connector and the wiring board, are drawn out, it is possible to take out the terminals of each of the two sets of strip portions 84 and 85 while fixing the fixing portion. The portions 82 and 83 can be stacked on each other and fixed with screws using the same screw 89. Thereby, the support part 24 extended from the fixing member 2 can be shared by the two sets of belt-like parts 84 and 85.

  By using such an FPC 8 for the connection between the image pickup device 11 of the image blur correction unit 100 and the fixing member 2, the influence due to the increase in the wiring of the FPC 8 can be reduced. Suitable for CMOS.

  FIG. 14 and FIG. 15 are perspective views of an imaging apparatus configured by including the imaging lens barrel 200 in the image blur correction unit 100 configured as described above, and FIG. 14 is a diagram viewed from the upper surface side. FIG. 15 is a view as seen from the back side. This imaging device is configured to include the image blur correction unit 100 housed in a main body housing (not shown) in an imaging lens barrel 200, and the FPC 8 is connected to the ultrasonic linear actuators 13 and 22 from the imaging element 11. FPC 80 is pulled out, and FPC 201 is pulled out from a zoom motor or a focus motor.

  In general, in the imaging lens barrel 200, the power from the zooming motor 202 is transmitted to the cam barrel 205 housed in the fixed barrel 204 via the gear box 203, and the cam barrel 205 is rotated by the rotation of the cam barrel 205. The zoom lens held by the straight movement cylinder is driven by the cam cylinder 205 and the internal straight movement cylinder (not shown) is driven while the front movement lens 206 is moved in the direction of the optical axis z. Is also displaced in the optical axis z direction. Note that a straight moving cylinder and a focus lens held by the cylinder are separately provided for focusing, and are driven by a small built-in motor.

  By configuring in this way, it is possible to realize an imaging device capable of achieving high definition and high-speed reading of the image sensor 11.

(Embodiment 2)
FIG. 11 is a perspective view for explaining a method of creating FPC 9 according to another embodiment of the present invention. The FPC 9 is similar to the FPC 8 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that the FPC 9 is cut out from the material sheet with a strip as shown in FIG. 11 (a), and formed and bent as shown in FIGS. 11 (b) to 11 (e). It is to be formed.

  Specifically, one end of the belt-like body is the drawer portion 81 and the other end is a fixed portion 92 to a connecting portion 96, and the slit 99 is formed between them, and both side portions of the slit 99 are belt-like portions. 94,95. Then, as shown in FIGS. 11 (b) to 11 (c), the fold lines 81d and 91d at the boundaries between the lead portion 81 and the fixing portion 92 and the strip portions 94 and 95 are valley-folded, respectively. Further, as shown in FIG. 11C through FIG. 11D and FIG. 11E, in the strip portions 94 and 95, in the vicinity of the boundary between the drawing portion 81 and the fixing portion 92, the broken lines 94a and 94b; 95a, By 95b, the surfaces of the slits 99 which are folded at a predetermined angle θ1, θ2 and are folded and in close contact with each other are bonded to each other. The valley fold and the mountain fold may be interchanged with each other depending on the direction in which the belt-like portions 94 and 95 and the fixing portion 92 are drawn with respect to the fixing portion 92 that is a vertical plane.

  When configured in this way, the FPC 8 shown in FIG. 10 described above could only be cut out from the material sheet of a prescribed size as shown in FIG. 12, whereas this FPC 9 shown in FIG. It can be cut out as shown in FIG. That is, in FIG. 12, there are 11 FPCs 8, whereas in FIG. 11, 23 FPCs 9 can be cut out. Therefore, a complicated three-dimensional shape having a loop can be created from a single strip (strip), and waste when cutting the strip of FPC 9 from the material sheet is reduced, and the number of strips taken can be reduced. This dramatically increases the cost.

  Angles θ1 and θ2 of the bent lines 94a and 94b; 95a and 95b may be equal to each other between the lead-out portion 81 side and the fixing portion 92 side in each strip-like portion 94 and 95, and coincide with each other between the strip-like portions 94 and 95. You don't have to. As a result, the angle at which the belt-like portions 94 and 95 protrude laterally on the drawer portion 81 side and the angle at which the belt-like portions 94 and 95 protrude laterally on the fixing portion 92 side can be made equal to each other. Can be reduced.

  For example, as indicated by a virtual line in FIG. 11 (e), it is possible to shift only the belt-like portion 95 side in the optical axis z (depth) direction (in FIG. 11 (e), θ2 is made small. ). As a result, interference with other components can be avoided. However, as the angles θ1 and θ2 deviate from 45 °, the width direction of the strips 94 and 95 approaches the horizontal (x) direction, which becomes a load when the sensor unit 1 moves in the horizontal (x) direction.

  Accordingly, if there is no circumstance such as avoiding the interference, the left and right belt-like portions 94 and 95 are both at the drawer portion 81 side and the fixing portion 92 side by making the angles θ1 and θ2 all equal at 45 °. It jumps out to the side equally, and the width in the optical axis z (depth) direction can be minimized.

  In the FPC 9, the fixing portion 92 may be divided into two by the slit 99. However, as described above, by cutting out from the material sheet with a strip and leaving the both ends to form the slit 99, only one fixing portion 92 and one connector can be provided.

  Moreover, in the above-mentioned embodiment, although two sets of strip | belt-shaped parts 84,85; 94,95 branched to right and left were comprised by one set, each strip | belt-shaped part 841,851; 842 of Fig.16 (a). , 852, each set may be further divided into a plurality of groups. Further, the number of divisions may be uneven, such as 1: 2 or 2: 1, and may be folded and stacked as indicated by arrows.

  Furthermore, in the drawer portion 81, as shown in FIG. 16B, two extending portions 81b may be drawn from the mounting portion 81a. Accordingly, as shown in FIG. 16C, two loops can be formed in the vertical direction. In this case, the shape is symmetrical in the left-right x direction and the up-down y direction, the load in the reciprocating direction of each ultrasonic linear actuator 13, 22 is the same, and the image blur correction performance can be further stabilized.

  In the above description, the image blur correction unit 100 according to the present embodiment is used for a camera whose lens cannot be exchanged, but may be used for a single-lens reflex camera. In addition to the ultrasonic linear actuators 13 and 22, a voice coil motor, a stepping motor, or the like can be used as the actuator.

DESCRIPTION OF SYMBOLS 1 Sensor unit 11 Sensor main body 12 Holder 125, 126 Recess 129 Holder 13, 22 Ultrasonic linear actuator 131, 221 Piezoelectric element 132, 222 Rod 135, 225 Receiving member 139, 229 Weight 2 Fixing member 24, 54 Support part 31- 33 Screws 34 to 36 Spring 4 Slider 41, 44 Sliding part 42, 45 Support piece 43, 46, 49 Hook 5 Shield plate 6 Permanent magnet 61, 62, 63 Spring 7 Hall element 71, 72 Spherical body 8, 9 FPC
80, 201 FPC
81 drawer part 81a mounting part 81b extension part 81c hole 81d, 91d; 94a, 94b; 95a, 95b broken line 82, 83; 92 fixing part 84, 85; 94, 95; 841, 851; 842, 852 87; 96 Connecting portion 89 Screw 99 Slit 100 Image blur correction unit 200 Imaging lens barrel

Claims (9)

In a flexible printed circuit board for drawing out wiring from a device driven to be displaced in a two-dimensional direction to a fixed position,
A drawer connected to the device and drawn in a direction substantially orthogonal to the two-dimensional;
A belt-shaped portion that is connected to the drawer portion and is branched into two sets, and they extend in a direction away from each other to form a substantially loop;
A flexible printed circuit board comprising: a fixing portion that is connected to the belt-like portion and is fixed to the fixing position. The fixing portions are stacked on each other and fixed at a common fixing position,
2. The flexible printed circuit board according to claim 1, further comprising: a terminal portion extending from the fixing portion in a direction substantially orthogonal to the two dimensions and spaced from each other in the separation direction. It is formed by slit formation and bending from a belt-like body, both end portions where the slit is not formed become the lead-out portion and the fixing portion, respectively, and both side portions of the slit become the belt-like portion,
The boundary between the drawer part and the fixing part and the belt-like part is folded in a mountain or valley,
2. The flexible printed circuit board according to claim 1, wherein, in the belt-shaped portion, the vicinity of the boundary between the lead-out portion and the fixed portion is folded into a valley or a mountain at a predetermined angle with respect to the slit.   4. The flexible printed circuit board according to claim 3, wherein the predetermined angle is substantially equal between the drawer portion side and the fixed portion side in the belt-like portion on each side of the slit.   The flexible printed circuit board according to claim 4, wherein the predetermined angles are all equal at 45 °. In an apparatus that optically corrects image blur by displacing the image sensor in two directions orthogonal to the optical axis,
An image blur correction apparatus using the flexible printed circuit board according to any one of claims 1 to 5 for connection between the image sensor and a fixed position. A slider that holds the image sensor in a displaceable manner in a first direction orthogonal to the optical axis;
A fixing member that holds the slider so as to be displaceable in a second direction orthogonal to the optical axis,
The image blur correction apparatus according to claim 6, wherein a separation direction of the belt-shaped portion is parallel to the second direction.   An image pickup apparatus comprising the lens unit in the image blur correction apparatus according to claim 6 or 7. In creating a flexible printed circuit board for pulling out wiring from a device driven to move in a two-dimensional direction to a fixed position,
Remaining both ends of the band-shaped body, forming slits, both the end portions where the slits are not formed as a drawer part and a fixing part, respectively, and forming both side parts of the slit as the band-shaped part;
A step of folding a mountain or a valley at the boundary between the drawer portion and the fixing portion and the belt-shaped portion;
A method for producing a flexible printed circuit board, comprising: a step of forming a valley or a mountain at a predetermined angle with respect to the slit in the vicinity of the boundary between the drawn portion and the fixed portion.

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