JP5230346B2 - Optical unit with shake correction function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical unit with a shake compensation function for suppressing a stress generated in a flexible substrate from hindering appropriate swing of a movable module. <P>SOLUTION: The flexible substrate 300 led out from the movable module 1 to a Y axis direction and fixed on a fixing body 210 includes a second C-shaped folding part 302 folded in a Z axis direction between a led out part 330a and the fixing part 350a to the fixing body 210. Since deformation of the flexible substrate 300 generated when swinging the movable module 1 around an X axis is absorbed with the second folding part 302, stress generated in the flexible substrate 300 is reduced. Thus, the stress does not hinder the appropriate swing of the movable module 1. In addition, when the stress generated in the second folding part 302 is small, the movable module 1 is fluctuated quickly since necessary force for fluctuating the movable module 1 is small. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an optical unit with a shake correction function for correcting a shake by swinging a movable module on which a lens is mounted. More specifically, the present invention relates to an optical unit with a shake correction function that can prevent the proper swing of the movable module from being hindered by the stress generated in the flexible substrate drawn from the movable module.

In order to suppress the shake of the optical unit due to the hand shake of the user in optical devices such as a shooting optical device mounted on a mobile phone or a digital camera, a laser pointer, a portable or in-vehicle projection display device, etc. Some have a shake correction function. For example, an optical unit with a shake correction function described in Patent Document 1 includes a movable module in which the optical unit is mounted with a lens and a light emitting element or a lens and an imaging element, a fixed body that supports the movable module, and a shake. And an actuator that displaces the movable module. When the shake detection sensor detects a shake, the movable module is displaced by the actuator so as to cancel out the shake.
JP 2007-129295 A

  A flexible substrate may be used when wiring to a light emitting element or an imaging element mounted on a movable module. One side of the flexible substrate is electrically connected to the light emitting element and the image pickup element and pulled out from the movable module, and the other side is fixed to the fixed body and is electrically connected to a control circuit, a power feeding circuit, and the like.

  Here, when the flexible substrate is used for wiring between the movable module and the fixed body, it is necessary to elastically deform the flexible substrate when the movable module is swung in order to perform shake correction. However, when the flexible substrate is elastically deformed, stress (shape restoring force) is generated in the flexible substrate, and this stress acts on the movable module and affects its swinging. There is a problem of inhibiting movement.

  In view of the above problems, an object of the present invention is a vibration that can suppress or avoid that the proper swinging of the movable module is hindered by the stress generated in the flexible substrate drawn from the movable module. The object is to provide an optical unit with a correction function.

In order to solve the above-described problems, the present invention provides at least a movable module on which a lens is mounted, a fixed body that supports the movable module, a shake detection sensor that detects a swing of the movable module, and the shake detection sensor. in the detection result the movable module based on by swinging on the fixed body shake and a shake correction mechanism for correcting a shake of the movable module correcting function optical unit, between the fixed body and the movable module Includes a pivot portion that can swing the movable module with respect to the fixed body, and three directions orthogonal to each other in the fixed body are defined as an X axis, a Y axis, and a Z axis, respectively. When a direction along the Z-axis is provided, a flexible substrate is provided that is pulled out from the movable module in the Y-axis direction and fixed to the fixed body, Serial flexible substrate, between the fixed part of the drawer portion and the fixed portion from the movable module, the cross-sectional shape in the YZ plane folding the the folded portions of the C-shape by being folded in a Z-axis direction A flat plate portion connected to the lead-out portion through an overlapping portion, and the folding portion has a narrower width in the X-axis direction than the other portion of the flexible substrate, and the folding portion In the portion, an opening is formed in a central portion in the X-axis direction, a hole is formed in the flat plate portion, the pivot portion is disposed inside the hole, and the hole is It is characterized by being continuous to the opening .

  According to the present invention, the flexible substrate has a folded portion having a C-shaped cross section between a portion pulled out from the movable module and a portion fixed to the fixed portion. Therefore, the deformation of the flexible substrate that occurs when the movable module is swung for shake correction is absorbed and suppressed at the folded portion. As a result, the stress generated in the flexible substrate can be reduced, so that it can be suppressed or avoided that this stress acts on the movable module and hinders its proper oscillation. Further, since the folded portion is bent, the deformation of the flexible substrate when the movable module is swung is reduced, so that the stress generated in the flexible substrate is also reduced. As a result, the force required to swing the movable module can be reduced, so that the movable module can be swung quickly. Therefore, shake correction can be performed quickly and accurately.

The folded portion is formed by folding the flexible substrate drawn in the Y-axis direction in the Z-axis direction so that the cross-sectional shape in the YZ plane is C-shaped. Therefore, when the movable module is swung around the X-axis, The deformation of the flexible substrate can be absorbed. Therefore, in particular, the movable module can be swung quickly and accurately when shake correction around the X axis is performed.

Furthermore, since the folded portion is narrower in the X-axis direction than the other portions of the flexible substrate , the folded portion is deformed with a small force . Therefore, the stress generated by this deformation is also reduced. Therefore, the stress generated in the flexible substrate when the movable module is swung around the Y axis can be reduced.

Moreover, since the opening is formed in the center part in the X-axis direction in the folded portion, the width in the X-axis direction of the folded portion can be reduced.

  Further, in this case, in order to make the stress generated in the flexible substrate equal even when the movable module swings in any direction around the Y axis, the shape of the folded portion is symmetric about the Y axis. It is preferable that

  Here, many optical units such as cameras and laser pointers mounted on portable devices are used with the optical axis oriented horizontally, and in such usage, pitching is more preferable than rolling. Likely to happen. Therefore, in order to quickly and accurately correct the vertical shake around the X axis that is likely to occur, when the Z axis is leveled, the rotation of the movable module around the X axis is a vertical shake, and the Y axis The rotation around is preferably a roll.

  According to the present invention, the flexible substrate has a folded portion having a C-shaped cross section between a portion pulled out from the movable module and a portion fixed to the fixed portion. Therefore, the deformation of the flexible substrate that occurs when the movable module is swung for shake correction is absorbed and suppressed at the folded portion. As a result, the stress generated in the flexible substrate can be reduced, so that it can be suppressed or avoided that this stress acts on the movable module and hinders its proper oscillation. Therefore, shake correction can be performed accurately.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following description, the three directions orthogonal to each other in the fixed body will be described as the X axis, the Y axis, and the Z axis, respectively, and the direction along the optical axis L (lens optical axis) will be described as the Z axis. Therefore, in the following description, of the shakes in each direction, rotation around the X axis corresponds to so-called pitching (pitch), rotation around the Y axis corresponds to so-called yawing (roll), and Z axis The rotation around corresponds to so-called rolling.

(Embodiment)
(Overall configuration of optical unit with shake correction function)
FIG. 1 is an explanatory diagram showing an entire optical unit with a shake correction function to which the present invention is applied . FIGS . 1A , 1B , and 1C are optical units with a shake correction function to which the present invention is applied. FIG. 2 is a perspective view of the camera as viewed from the subject side (front side), a perspective view of the camera as viewed from the rear side opposite to the subject, and an explanatory view showing a state in which the optical unit with a shake correction function is mounted on a portable device such as a mobile phone.

  An optical unit 200 with a shake correction function (an optical unit with a camera shake correction function) shown in FIGS. 1A and 1B is a thin camera used for a mobile phone with a camera, and has a substantially rectangular parallelepiped shape as a whole. Yes. In this embodiment, the optical unit 200 with a shake correction function includes a substantially rectangular plate-shaped base 220 and a box-shaped fixed cover 260 that covers the base 220. The base 220 and the fixed cover 260 are mutually connected. It is fixed and constitutes a part of the fixed body 210. In the fixed body 210, the front end portion (subject end portion) of the fixed cover 260 has a shutter mechanism, a filter drive mechanism for switching various filters to appear on the optical axis and retracted from the optical axis, and In some cases, an accessory module containing a diaphragm mechanism is fixed.

  The fixed cover 260 has a rectangular shape when viewed from the optical axis direction, and includes a rectangular top plate portion 261 on the front side. A rectangular opening 261 a is formed in the top plate portion 261, and four side plate portions 262 extend from the outer peripheral edge of the top plate portion 261 toward the rear. Of the four side plate portions 262, a notch 262a is formed at the rear end edge of the two side plate portions 262 located in the Y-axis direction, and of the two side plate portions 262 located in the Y-axis direction. The drawing portion 350 of the flexible substrate 300 is drawn out in the Y-axis direction through the notch 262a of the one side plate portion 262. The drawer part 350 of the flexible substrate 300 has its fixing part 350 a fixed to the side plate part 262 with an adhesive or the like.

  Inside the fixed cover 260, a movable module 1 incorporating a focusing mechanism for the lens and a camera shake correction mechanism for performing shake correction by swinging the movable module 1 are configured. The movable module 1 has a lens driving module 1a that incorporates a focusing mechanism for the lens, and the lens driving module 1a is held inside a rectangular tube-shaped module cover 160.

(Configuration of lens drive module)
FIG. 2 is an explanatory diagram of the lens driving module 1a configured in the movable module 1 of the optical unit 200 with a shake correction function to which the present invention is applied, and FIGS. 2 (a) and 2 (b) respectively show the lens driving module 1a. They are the external view seen from diagonally upward, and an exploded perspective view. FIG. 3 is an explanatory view schematically showing the operation of the lens driving module 1a shown in FIG. The left half of FIG. 3 shows a view when the moving body 3 is at an infinite position (normal shooting position), and the right half of FIG. 3 shows the moving body 3 in the macro position (close-up shooting position). The figure when it exists in is shown.

  2A, 2 </ b> B, and 3, the lens driving module 1 a is configured such that the lens moves along the direction of the optical axis L in the A direction (front side) approaching the subject (object side) and the side opposite to the subject ( This is for moving in both directions in the B direction (rear side) approaching the image sensor side / image side, and has a substantially rectangular parallelepiped shape. The lens driving module 1a generally includes a moving body 3 that holds three lenses 121 and a fixed diaphragm inside, a lens driving mechanism 5 that moves the moving body 3 along the direction of the optical axis L, and a lens driving mechanism. 5 and the support body 2 on which the moving body 3 and the like are mounted. The moving body 3 includes a cylindrical lens holder 12 that holds a lens 121 and a fixed diaphragm, and a lens driving coil holder 13 that holds lens driving coils 30s and 30t, which will be described later, on an outer peripheral side surface.

  The support 2 includes a rectangular plate-shaped image sensor holder 19 that positions the image sensor 15 on the side opposite to the object side, a box-shaped case 18 that covers the image sensor element 19 on the object side, and an inner side of the case 18. A rectangular plate-like spacer 11 is provided, and circular incident windows 110 and 18a for taking in light from the subject into the lens 121 are formed in the center of the case 18 and the spacer 11, respectively. A hole 19 a that guides incident light to the image sensor 15 is formed in the center of the image sensor holder 19.

  Further, in the lens driving module 1 a, the support 2 includes a substrate 154 on which the image sensor 15 is mounted, and the substrate 154 is fixed to the lower surface of the image sensor holder 19. Here, the substrate 154 is a double-sided substrate, and the flexible substrate 300 shown in FIG. 1 is connected to the lower surface side of the substrate 154.

  In this embodiment, the case 18 is made of a ferromagnetic plate such as a steel plate and also functions as a yoke. For this reason, the case 18 constitutes an interlinkage magnetic field generator 4 that generates an interlinkage magnetic field in the lens drive coils 30 s and 30 t held by the lens drive coil holder 13 together with a lens drive magnet 17 described later. The cage. The interlinkage magnetic field generator 4 constitutes the lens driving mechanism 5 together with the lens driving coils 30 s and 30 t wound around the outer peripheral surface of the lens driving coil holder 13.

  The support 2 and the moving body 3 are connected via metal spring members 14s and 14t. The spring members 14s and 14t have the same basic configuration, and an outer peripheral side connecting portion 14a held on the support body 2 side, an annular inner peripheral side connecting portion 14b held on the moving body 3 side, An arm-shaped leaf spring portion 14c that connects the outer peripheral side connecting portion 14a and the inner peripheral side connecting portion 14b is provided. Among the spring members 14 s and 14 t, the imaging element side spring member 14 s holds the outer peripheral side connecting portion 14 a on the imaging element holder 19, and the inner peripheral side connecting portion 14 b images the lens driving coil holder 13 of the moving body 3. It is connected to the element side end face. In the subject-side spring member 14 t, the outer peripheral side connecting portion 14 a is held by the spacer 11, and the inner peripheral side connecting portion 14 b is connected to the subject side end face of the lens driving coil holder 13 of the moving body 3. In this way, the moving body 3 is supported by the support body 2 so as to be movable in the direction of the optical axis L via the spring members 14s and 14t. The spring members 14s and 14t are both made of nonmagnetic metal such as beryllium copper or nonmagnetic SUS steel, and are formed by pressing a thin plate having a predetermined thickness or etching using a photolithography technique. It is. Of the spring members 14s and 14t, the spring member 14s is divided into two spring pieces 14e and 14f, and the ends of the lens driving coils 30s and 30t are connected to the spring pieces 14e and 14f, respectively. Further, in the spring member 14s, terminals 14d are formed on the spring pieces 14e and 14f, respectively, and the spring members 14s (spring pieces 14e and 14f) also function as power supply members for the lens driving coils 30s and 30t.

  In this embodiment, the ring-shaped magnetic piece 61 is held on the front end face of the lens driving coil holder 13, and the position of the magnetic piece 61 is the front side position with respect to the lens driving magnet 17. The magnetic piece 61 applies an urging force in the direction of the optical axis L to the moving body 3 by an attractive force acting between the magnetic piece 61 and the lens driving magnet 17. For this reason, since it is possible to prevent the moving body 3 from being displaced by its own weight when no current is applied, it is possible to keep the moving body 3 in a desired posture and to further improve the impact resistance. The magnetic piece 61 is disposed on the front end surface of the lens holder 12. When the magnetic piece 61 is not energized (origin position), the lens holder 12 is placed on the rear side by being attracted to the lens driving magnet 17. can do.

  In the lens driving module 1a of this embodiment, when viewed from the direction of the optical axis L, the lens 121 is circular, but the case 18 used for the support 2 has a rectangular box shape. Therefore, the case 18 includes a rectangular tube-shaped body portion 18c, and an upper plate portion 18g having an incident window 18a formed on the upper surface side of the rectangular tube-shaped body portion 18c. In this embodiment, the rectangular tube-shaped body portion 18c is a rectangular tube shape, and includes four side plate portions 18b at each position corresponding to a square side when viewed from the direction of the optical axis L. A lens driving magnet 17 is fixed to the inner surface of each of the four side plate portions 18b. Each of the lens driving magnets 17 is a rectangular flat permanent magnet. Each of the four lens driving magnets 17 is magnetically divided into two in the direction of the optical axis L, and in any case, the inner surface and the outer surface are magnetized to different poles. For example, in the four lens driving magnets 17, for example, the inner surface is magnetized to the N pole in the upper half, the outer surface is magnetized to the S pole, and the inner surface is magnetized to the S pole in the lower half. The pole is magnetized. For this reason, in the four lens driving magnets 17, the arrangement of the magnetic poles is the same between the adjacent permanent magnets, and the flux linkage lines for the coil can be generated efficiently.

  The movable body 3 includes a cylindrical lens holder 12 that holds the lens 121 and the like, and a lens driving coil holder 13 in which coils (lens driving coils 30s and 30t) are wound around the outer peripheral side surface. The holder 12 and the lens driving coil holder 13 constitute a side wall portion of the moving body 3. In the lens holder 12, the upper half is a large-diameter cylindrical portion 12b having a large diameter, and the lower half is a small-diameter cylindrical portion 12a having a smaller diameter than the large-diameter cylindrical portion 12b. The lens driving coil holder 13 includes a circular lens holder housing hole 130 for holding the lens holder 12 inside.

  In this embodiment, when the lens driving coil holder 13 is viewed from the direction of the optical axis L, the inner peripheral shape is circular. However, the outer peripheral side surface 131 that defines the outer peripheral shape of the lens driving coil holder 13 is a quadrangle. The four surfaces 132 are provided at positions corresponding to the four sides. On the outer peripheral side surface 131 of the lens driving coil holder 13, rib-shaped protrusions 131 a, 131 b, 131 c are formed at both ends and the center position in the direction of the optical axis L over the entire periphery, and the image sensor side end A recess sandwiched between the rib-shaped protrusion 131a formed at the center and the rib-shaped protrusion 131b formed at the center is a first coil winding section 132a, and the rib-shaped protrusion 131c formed at the subject side end. And a recess sandwiched between the rib-shaped protrusion 131b formed at the center position is a second coil winding portion 132b.

  In the lens driving coil holder 13, each of the four surfaces 132 is removed so as to avoid a square corner portion with respect to each of the first coil winding portion 132 a and the second coil winding portion 132 b. A rectangular through hole (through holes 133a, 133b) is formed, and the through holes 133a, 133b penetrate the side wall of the lens driving coil holder 13 in the inner and outer directions. In this manner, in the present embodiment, the through holes 133a and 133b of the lens driving coil holder 13 form a hollow portion that is recessed inward on the outer peripheral side surface 131 of the movable body 3. However, in the circumferential direction, the through holes 133a and 133b are circumferential length dimensions of each surface 132 (rectangular shape) sandwiched between adjacent corner portions on the outer peripheral side surface 131 of the lens driving coil holder 13. It is formed with a dimension of about 1/3 of the dimension of the side. For this reason, a thick column portion 134 extending in the direction of the optical axis L is formed in the corner portion of the lens driving coil holder 13 with an equal thickness.

  In the lens driving coil holder 13 configured as described above, the lens driving coil 30s is wound around the first coil winding portion 132a, and the lens driving coil 30t is wound around the second coil winding portion 132b. It has been turned. Here, since the first coil winding portion 132a and the second coil winding portion 132b are quadrangular when viewed from the direction of the optical axis L, the lens driving coils 30s and 30t are both wound in a rectangular tube shape. ing. Each of the four lens driving magnets 17 is magnetically divided into two in the direction of the optical axis L, and in any case, the inner surface and the outer surface are magnetized to different poles, and therefore, the two lens driving magnets are driven. The winding directions in the coils 30s, 30t are opposite.

  The thus configured lens driving coil holder 13 is arranged inside the case 18. As a result, the four side portions of the lens driving coils 30 s and 30 t face the lens driving magnet 17 fixed to the inner surface of the rectangular cylindrical body portion 18 c of the case 18.

(Operation of lens drive mechanism)
In the lens driving module 1a of the present embodiment, the moving body 3 is normally located on the imaging element side (imaging element side), and in such a state, a current in a predetermined direction flows through the lens driving coils 30s and 30t. Then, the lens driving coils 30s and 30t each receive an upward (front) electromagnetic force. Accordingly, the moving body 3 to which the lens driving coils 30s and 30t are fixed starts to move toward the subject side (front side). At this time, an elastic force that restricts the movement of the moving body 3 is generated between the spring member 14 t and the front end of the moving body 3 and between the spring member 14 s and the rear end of the moving body 3. For this reason, when the electromagnetic force which moves the moving body 3 to the front side and the elastic force which regulates the movement of the moving body 3 balance, the moving body 3 stops. At this time, the moving body 3 can be stopped at a desired position by adjusting the amount of current flowing through the lens driving coils 30 s and 30 t according to the elastic force acting on the moving body 3 by the spring members 14 s and 14 t. .

  In the lens driving module 1a, the lens 121 is circular. Regardless of the lens shape, the lens driving coils 30s and 30t are square, and the lens driving magnet 17 has an inner peripheral surface on the support 2. It is a plate-like permanent magnet fixed to each of a plurality of inner surfaces corresponding to the sides of the rectangular tube body 18c of the case 18 formed in a quadrangle. For this reason, even when there is not enough space on the outer peripheral side of the moving body 3 between the moving body 3 and the support body 2, the facing area between the lens driving coils 30s and 30t and the lens driving magnet 17 is large. , Can exert a sufficient thrust.

  For the lens driving module 1a configured as described above, it is necessary to electrically connect the imaging device 15 and the lens driving coils 30s and 30t to a control unit (not shown) of the apparatus main body. Therefore, in this embodiment, the flexible substrate 300 (see FIG. 1) is disposed on the opposite side to the subject side with respect to the lens driving module 1a, and the imaging element 15 and the lens driving coil 30s are arranged on the wiring pattern formed on the flexible substrate 300. , 30t are electrically connected.

(Overall configuration of image stabilization mechanism)
As shown in FIG. 1C, the optical unit 200 with shake correction function of this embodiment is mounted on a device 500 such as a mobile phone and used for photographing. In such a device 500, when shooting, the Z axis is generally horizontally oriented. Accordingly, there is a possibility that vertical shake around the X axis and horizontal shake around the Y axis may occur due to camera shake when the shutter is pressed. Therefore, in this embodiment, a camera shake correction function described below with reference to FIGS. 4 to 14 is added. In such a shake correction mechanism, a shake detection sensor is provided in the movable module 1, and the movable module 1 arranged so as to be swingable about the X axis and the Y axis with respect to the fixed body 210 is swung by the shake correction magnetic drive mechanism. It has a configuration to let you.

Therefore, the overall configuration of the sequentially movable module 1 and the fixed body 210 shown below for each configuration of the shake correction mechanism configured in the optical unit 200 with the shake correction function according to the present embodiment.
Detailed configuration of movable module 1 FIG. 4, FIG. 5, FIG. 6 to FIG.
Configuration of support mechanism for movable module 1 FIG. 4, FIG. 5, FIG. 11 and FIG.
Configuration of movable range limiting mechanism for movable module 1...
I will explain it.

  FIG. 4 is an explanatory diagram showing a cross-sectional configuration of an optical unit with a shake correction function to which the present invention is applied, and FIGS. 4 (a) and 4 (b) each show an optical unit with a shake correction function to which the present invention is applied. FIG. 2 is a longitudinal sectional view when cut at a position corresponding to the line Y1-Y1 ′ in FIG. 1A and a longitudinal sectional view when cut at a position corresponding to the line X1-X1 ′ in FIG. . FIG. 5 is an explanatory diagram showing a cross-sectional configuration when the optical unit with a shake correction function to which the present invention is applied is cut at a position different from that in FIG. 4, and FIGS. FIG. 1A is a longitudinal sectional view of the optical unit with a shake correction function to which the invention is applied, taken at a position corresponding to the line C1-C1 ′ in FIG. 1A, and corresponds to the line C2-C2 ′ in FIG. It is a longitudinal cross-sectional view when cut | disconnecting in the position to perform. 6 and 7 are respectively an exploded perspective view of the optical unit with a shake correction function to which the present invention is applied as seen from the front side, and an exploded perspective view as seen from the rear side. FIG. 8 is an explanatory diagram of a movable module of an optical unit with a shake correction function to which the present invention is applied and members connected to the movable module, and FIGS. 8A and 8B each show a shake to which the present invention is applied. It is the perspective view which looked at the movable module of the optical unit with a correction function, and the member connected to this movable module from the front side, and the perspective view seen from the rear side.

  In this embodiment, as shown in FIGS. 4, 5, 5, and 6, for the fixed body 210, the base 220, the rear stopper member 270, the front stopper member 290, and the fixing cover 260 are sequentially stacked and fixed. It has a structure. Although detailed configurations of these members will be described later, the base 220 has a function of supporting the movable module 1 so as to be swingable, and the rear stopper member 270 and the front stopper member 290 are configured to be swingable. The fixed cover 260 functions as a housing of the optical unit 200 with a shake correction function and also has a function of holding the shake correction coils 230x and 230y.

  A flexible substrate 300 and a spring member 280 shown in FIGS. 4 to 8 are arranged between the base 220 and the movable module 1, and the flexible substrate 300 and the spring member 280 are connected to the movable module 1. The flexible substrate 300 has a function of electrically connecting the shake detection sensor 170 and the shake correction magnetic drive mechanism to the outside, and the spring member 280 has a function of urging the movable module 1 toward the base 220. ing.

(Detailed configuration of movable module 1 and arrangement of camera shake detection sensor 17)
FIGS. 9 and 10 are an exploded perspective view and a perspective view, respectively, of the movable module 1 and the flexible substrate 300 used in the optical unit 200 with a shake correction function to which the present invention is applied, as viewed from the front side.

  As shown in FIGS. 4 to 10, the movable module 1 includes a module cover 160 that holds the lens driving module 1 a inside. The module cover 160 has a rectangular shape when viewed from the Z-axis direction, and four side plate portions 162 extend from the outer peripheral edge of the rectangular top plate portion 161 to the rear side. In the module cover 160, the top plate portion 161 has a circular opening 161a.

  A rear end portion of the module cover 160 is open, and a metal sensor cover 180 is connected to the rear end portion of the module cover 160 so as to cover the opening. In performing this connection, in the present embodiment, a module cover side flange portion 168 is formed at each of the four corners of the module cover 160 at the rear end portion thereof so as to project outward in a plane orthogonal to the Z axis. Has been. Further, at the front end portion of the sensor cover 180, a sensor cover side flange portion 188 is formed at each of the four corner portions so as to project outward in a plane orthogonal to the Z axis. 188 and the module cover side flange portion 168 are formed so as to overlap in the Z-axis direction. Small holes 188 a and 168 a are formed in the sensor cover side flange portion 188 and the module cover side flange portion 168.

  In this embodiment, a cylindrical member 199 having a female screw formed on the inner peripheral surface is fixed to the shaft portion with the shaft portion of the screw 198 passing through the small holes 188a and 168a. When the sensor cover 180 and the module cover 160 are connected in this manner, the module cover side flange portion 168 and the sensor cover side flange portion 188 are provided on the outer peripheral surface of the movable module 1 as shown in FIGS. The protrusions 103 projecting outward at the four corners of the movable module 1 are formed.

  The sensor cover 180 includes a bottom plate portion 181 and four side plate portions 182 that stand on the front side at the outer peripheral edge of the bottom plate portion 181, and of the four side plate portions 182, the side plate portion 182 that faces in the Y-axis direction. Has a notch 182a formed at the front edge thereof. For this reason, a gap that opens in the Y-axis direction is formed between the sensor cover 180 and the module cover 160 in a state where the sensor cover 180 and the module cover 160 are connected. Therefore, a part of the flexible substrate 300 can be disposed between the sensor cover 180 and the lens driving module 1a, and the drawer portion 350 of the flexible substrate 300 can be pulled out from the movable module 1 from one side in the Y-axis direction.

  Here, the flexible substrate 300 folds a substantially rectangular sheet extending in the Y-axis direction in the Z-axis direction at three locations in the longitudinal direction (first, second, and third folded portions 301, 302, and 303). It is a stacked shape. For this reason, the flexible substrate 300 includes a lead-out portion 350 to the outside, a first flat plate portion 310 connected to the lead-out portion 350, and a second flat plate portion connected to the first flat plate portion 310 via the first folded portion 301. 320, a third flat plate portion 330 connected to the second flat plate portion 320 via the second folded portion 302, and a fourth flat plate portion connected to the third flat plate portion 330 via the third folded portion 303. 340, and the first flat plate portion 310, the second flat plate portion 320, the third flat plate portion 330, and the fourth flat plate portion 340 are overlapped in order from the rear side to the front side in the Z-axis direction. The first and third folded portions 301 and 303 are bent at an acute angle. The second folded portion 302 has a shape in which the cross-sectional shape in the YZ plane is gently curved into a C shape.

  In the flexible substrate 300, the first flat plate portion 310 and the second flat plate portion 320 are disposed on the rear side (lower side) of the sensor cover 180, and the third flat plate portion 330 and the fourth flat plate portion 340 are arranged on the front surface of the sensor cover 180. And the lens driving module 1a. Accordingly, one side of the flexible substrate 300 sandwiching the second folded portion 302 is routed inside the movable module 1, and the other side of the flexible substrate 300 sandwiching the second folded portion 302 is from the movable module 1. The configuration extends to the outside.

  In the flexible substrate 300, the camera shake detection sensor 170 is mounted on the lower surface of the third flat plate portion 330, and the lower surface of the camera shake detection sensor 170 is bonded and fixed to the sensor cover 180. Accordingly, in the flexible substrate 300, the third flat plate portion 330, the third folded portion 303, and the fourth flat plate portion 340 drawn around inside the movable module 1 are displaced integrally with the movable module 1, and in the flexible substrate 300, Of the first flat plate portion 310, the first folded portion 301, and the second flat plate portion 320 that are drawn out from the movable module 1, the portion close to the drawing portion 330 a from the movable module 1 swings the movable module 1. Follow and deform.

  A metal plate 380 is fixed to the upper surface of the third flat plate portion 330 via a flexible double-sided tape 370. Therefore, the lower surface side of the camera shake detection sensor 170 is shielded by the sensor cover 180, and the upper surface side of the camera shake detection sensor 170 is shielded by the metal plate 380. Further, the metal plate 380 is interposed between the camera shake detection sensor 170 and the image sensor 15 (see FIG. 2), and has a function of shielding the lower surface side of the image sensor 15. The image sensor 15 and the lens driving coils 30s and 30t described with reference to FIG. 2 are electrically connected to the fourth flat plate portion 340 of the flexible substrate 300 directly or via a wiring member (not shown). ing. In this embodiment, the camera shake detection sensor 170 is a surface mount type gyro sensor (angular velocity sensor), and is a sensor that detects an angular velocity of two axes, preferably two axes orthogonal to each other.

  In the flexible substrate 300, the first flat plate portion 310 and the second flat plate portion 320 arranged on the rear side of the sensor cover 180 are formed with large-diameter round holes 310a and 320a. This is a cut-out portion for arranging a support mechanism 400 for swingably supporting the movable module 1 on the rear surface side of the cover 180. Thus, in this embodiment, the flexible substrate 300 is arranged so as to avoid the support mechanism 400 by forming a cutout in the flexible substrate 300. For this reason, the space sandwiched between the base 220 and the movable module 1 can be effectively utilized as a space for routing the flexible substrate 300. Further, in the first flat plate portion 310, the first folded portion 301, the second flat plate portion 320, and the second folded portion 302, a slit 300a is formed in the center portion in the width direction. It extends continuously from the hole 310 a formed in the first flat plate portion 310 to the folded portion 302.

(Configuration of support mechanism 400)
FIG. 11 is an explanatory diagram of members constituting a support mechanism and the like in an optical unit with a shake correction function to which the present invention is applied. FIGS. 11 (a), 11 (b), 11 (c), and 11 (d) each show a book. The perspective view which looked at arrangement of the base of an optical unit with a shake amendment function to which an invention was applied, a spring member, and a sensor cover from the front side, the perspective view seen from the back side, the exploded perspective view seen from the front side, and the exploded perspective view seen from the back side is there. 12A and 12B are respectively an explanatory view and a cross-sectional view of the arrangement of the base, the spring member, and the sensor cover of the optical unit with a shake correction function to which the present invention is applied as viewed from the front.

  As shown in FIG. 11, the bottom plate portion 181 of the sensor cover 180 described with reference to FIGS. 4, 5, 9, and 10 has a circular portion 186 at the center thereof recessed backward, and the circular portion 186. A central portion of the ridge is formed with a recess 187 that protrudes forward and opens at the lower surface.

  The base 220 arranged to face the sensor cover 180 on the rear side has a configuration in which four side plate parts 222 are erected from the outer peripheral edge of the rectangular bottom plate part 221 to the front side, and the side plate part is opposed in the Y-axis direction. A notch 222a for pulling out the flexible substrate 300 described with reference to FIG. 9 and FIG.

  In the base 220, a support protrusion 227 protruding forward is formed at the center portion of the bottom plate portion 221, and a hemispherical small protrusion 227 a is formed on the front end surface of the support protrusion 227. Accordingly, as shown in FIG. 12A, when the sensor cover 180 is disposed on the front side of the base 220, the support protrusion 227 of the base 220 is attached to the sensor cover 180 as shown in FIGS. 4, 5, and 12B. And the small protrusion 227 a comes into contact with the bottom lower surface 187 a of the recess 187.

  In this manner, in this embodiment, a bipot portion is formed between the base 220 of the fixed body 210 and the sensor cover 180 of the movable module 1 by the bottom lower surface 187a of the recess 187 and the small protrusion 227a of the support protrusion 227. The pivot portion constitutes a support mechanism 400 that can swing the movable module 1 with respect to the fixed body 210. The support mechanism 400 is located behind the camera shake detection sensor 170 with respect to the camera shake detection sensor 170. Are arranged at positions overlapping in the optical axis direction.

  In FIG. 11 again, the base 220 is a pressed product of a metal plate. In the bottom plate portion 221, a concave portion 226 recessed rearward is provided between the outer peripheral region 221a and the central region 221b where the support protrusion 227 is formed. The recess 226 is formed so as to surround three sides of the central region 221b where the support protrusion 227 is formed. Further, in the bottom plate portion 221 of the base 220, a slit 228 is formed in the central region 221b so as to surround three sides of the region where the support protrusion 227 is formed, and the slit 228 extends in the Y-axis direction. The support protrusion 227 is formed at the tip of the leaf spring portion 229 formed in the above. Therefore, when the leaf spring portion 229 is deformed in the Z-axis direction, the entire support mechanism 400 is displaced in the Z-axis direction.

  Here, the leaf spring portion 229 is positioned slightly in front of the rear surface of the base 220. For this reason, as shown in FIGS. 4A and 4B, the rear surface of the leaf spring portion 229 is positioned in front of the rear surface of the base 220 and the rear end edge of the fixed cover 260 by a predetermined dimension G10.

(Configuration of the spring member 280)
A spring member 280 that biases the movable module 1 toward the base 220 is disposed between the sensor cover 180 and the base 220 of the movable module 1. The spring member 280 is a flat spring having a flat rectangular shape, which is made of metal such as phosphor bronze, beryllium copper, nonmagnetic SUS steel, or the like, and used to press a thin plate having a predetermined thickness or photolithography technology. It is formed by etching.

  In the spring member 280, fixed body side connecting portions 281 that are connected to the fixed body 210 are formed at four corner portions. In this embodiment, the fixed body side connecting portion 281 is fixed to the rear stopper member 270 shown in FIGS. 4 to 7 among a plurality of members constituting the fixed body 210. For this reason, small holes 281a are formed in the fixed body side connecting portion 281 of the spring member 280, while small protrusions 277a are formed at four corners on the rear surface of the rear stopper member 270. Therefore, if the small protrusion 277a of the rear stopper member 270 is fitted into the small hole 281a of the spring member 280, the spring member 280 and the rear stopper member 270 are positioned, and then bonded or crimped, the fixed body side connecting portion 281 can be connected to the fixed body 210.

  A substantially rectangular movable module side connecting portion 282 that is connected to the sensor cover 180 of the movable module 1 is formed in the central portion of the spring member 280, and the sensor cover 180 has a central region in the movable body connecting portion 282. A circular hole 282a into which a circular portion 186 protruding rearward from the bottom plate portion 181 is formed is formed. In the spring member 280, the movable module side connecting portion 282 is fixed to the rear surface of the bottom plate portion 181 of the sensor cover 180 by a method such as adhesion.

  The spring member 280 is a gimbal spring including four narrow arm portions 283 having both ends connected to a central movable module side connecting portion 282 and four fixed body side connecting portions 281. In this embodiment, each of the four arm portions 283 is configured to extend in the X axis direction or the Y axis direction along the side portion of the movable module side connecting portion 282. Here, the movable module side connecting portion 282 is located in front of the fixed body side connecting portion 281. For this reason, the arm portion 283 biases the movable module 1 toward the base 220. In this embodiment, the four arm portions 283 all extend from the fixed body side connecting portion 281 in the same circumferential direction, and the four arm portions 283 have the same shape and size around the optical axis. They are arranged at equiangular intervals. For this reason, all the four arm portions 283 are rotationally symmetric at 90 degrees, 180 degrees, and 270 degrees.

  Here, the first flat plate portion 310 and the second flat plate portion 320 of the flexible substrate 300 described with reference to FIGS. 9 and 10 are disposed between the spring member 280 and the base 220 on the rear side of the sensor cover 180. Is done. Therefore, in the spring member 280, the two fixed body side connecting portions 281 are connected by the beam portion 284 in the X axis direction, but the beam portion 284 is not formed in the Y axis direction, and the space between the fixed body side connecting portions 281 is not provided. There is a notch. For this reason, the flexible substrate 300 can be passed between the fixed body side connecting portions 281 on one side in the Y-axis direction.

  Further, on the rear surface of the bottom plate portion 181 of the sensor cover 180, the portion overlapping the arm portion 283 of the spring member 280 in the Z-axis direction is compared to the region where the movable module side connecting portion 282 of the spring member 280 is connected. It is a recess 181e that is recessed toward the front side. Therefore, the bottom plate portion 181 of the sensor cover 180 is not in contact with the arm portion 283 at all, and the bottom plate portion 181 and the arm portion 283 of the sensor cover 180 are in contact even when the movable module 1 is swung. There is nothing.

(Configuration of shake correction magnetic drive mechanism)
Furthermore, in this embodiment, as a camera shake correction magnetic drive mechanism for correcting camera shake that generates a magnetic force that swings the movable module 1, the movable module 1 is swung around the X axis with the support mechanism 400 as a fulcrum. A shake correction magnetic drive mechanism 250x and a second shake correction magnetic drive mechanism 250y that swings the movable module 1 about the Y axis with the support mechanism 400 as a fulcrum are configured. The configurations of the drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y will be described below.

  First, in the movable module 1, on the outer surfaces of the two side plate portions 162 of the module cover 160 that face each other in the Y-axis direction, a rectangular plate-shaped camera shake correction magnet 240x (which constitutes the first camera shake correction magnetic drive mechanism 250x) A rectangular plate-shaped camera shake correction magnet constituting the second camera shake correction magnetic drive mechanism 250y is provided on the outer surface of the other two side plate portions 162 facing each other in the X-axis direction. 240y (second camera shake correction magnet) is held. Here, each of the image stabilization magnets 240x and 240y is a rectangular flat permanent magnet. In this embodiment, the image stabilization magnets 240x and 240y are constituted by two flat plate permanent magnets arranged in the Z-axis direction. In these flat plate permanent magnets, the outer surface side and the inner surface side are magnetized to different poles. ing. Moreover, the magnetization direction is reverse in the two flat permanent magnets arranged in the Z-axis direction. As for the camera shake correction magnets 240x and 240y, two permanent magnets may be magnetized with different polarities.

  In addition, in the fixed body 210, the image stabilization coil 230x (the first image stabilization) constituting the first image stabilization magnetic drive mechanism 250x is disposed in the two side plate portions 262 of the fixed cover 260 facing each other in the Y-axis direction. For the camera shake correction coil 230y (second camera shake correction) constituting the second camera shake correction magnetic drive mechanism 250y, in the two side plate portions 262 of the fixed cover 260 facing each other in the X-axis direction. Coil) is held. The camera shake correction coils 230x and 230y face the camera shake correction magnets 240x and 240y, respectively. In addition, two effective sides located in the Z-axis direction in the camera shake correction coils 230x and 230y respectively face the two flat permanent magnets arranged in the Z-axis direction in the camera shake correction magnets 240x and 240y. doing.

  As described above, in this embodiment, the first camera shake correction magnetic drive mechanism 250x configured to swing the movable module 1 around the X axis in pairs at two locations facing each other with the support mechanism 400 interposed therebetween in the Y axis direction is configured. In the first camera shake correction magnetic drive mechanism 250x, the two camera shake correction coils 230x are connected so that the movable module 1 generates a magnetic drive force in the same direction around the X axis when energized. Has been. Accordingly, the two first camera shake correction magnetic drive mechanisms 250x apply a moment in the same direction around the X axis passing through the support mechanism 400 to the movable module 1 when the two camera shake correction coils 230x are energized. Further, in the present embodiment, the second camera shake correction magnetic drive mechanism 250y is configured that makes the movable module 1 swing around the Y axis in pairs at two locations facing each other with the support mechanism 400 interposed therebetween in the X axis direction. In the second camera shake correction magnetic drive mechanism 250y, the two camera shake correction coils 230y are wire-connected so as to generate a magnetic drive force in the same direction around the Y axis when energized. ing. Accordingly, the two second camera shake correction magnetic drive mechanisms 250y apply a moment in the same direction around the Y axis passing through the support mechanism 400 to the movable module 1 when the two camera shake correction coils 230y are energized.

  Accordingly, the configuration is different from the configuration in which the first camera shake correction magnetic drive mechanism 250x is disposed only on one side with respect to the support mechanism 400 or the configuration in which the second camera shake correction magnetic drive mechanism 250y is disposed only on one side with respect to the support protrusion 227. Since the driving ability is stable, camera shake can be accurately corrected. For example, of the two first camera shake correction magnetic drive mechanisms 250x, the positional relationship between the camera shake correction magnet 240x and the camera shake correction coil 230x constituting the first camera shake correction magnetic drive mechanism 250x is two first camera shake correction. When one of the magnetic drive mechanisms for driving 250x deviates in a direction in which the magnetic driving force decreases, the other first magnetic shake correcting mechanism for vibration correction 250x is used for correcting the camera shake in one of the first shake correcting magnetic drive mechanisms 250x. Since the displacement of the position of the magnet 240x and the shake correction coil 230x is corrected, that is, the direction in which the magnetic drive force is increased, the drive capability of the first shake correction magnetic drive mechanism 250x is stable. . This effect is the same as in the second camera shake correction magnetic drive mechanism 250y.

  In this embodiment, in both the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y, magnets (camera shake correction magnets 240x and 240y) are provided on the movable module 1 side which is the movable body side. Since the coils (shake correction coils 230x and 230y) are held on the fixed body 210 side, the number of wires for the movable module 1 on the movable body side may be small, and the wiring structure can be simplified. . Further, on the fixed body 210 side, the number of turns of the camera shake correction coils 230x and 230y can be increased by devising the shape of the fixed cover 260 or the like, so that a large driving force can be exhibited.

  The rear end portion of the module cover 160 is bent slightly outward to enhance the magnetic flux collecting performance.

  The camera-equipped mobile phone equipped with the optical unit 200 with the shake correction function configured as described above is equipped with a camera shake detection sensor 170 such as a gyro sensor for detecting camera shake during shooting. Based on the detection result in, the control unit mounted on the camera-equipped mobile phone energizes one or both of the camera shake correction coil 230x and the camera shake correction coil 230y, and moves the movable module 1 around the X axis and in the Y direction. Swing in one and both around the axis. If such swinging is combined, the movable module 1 is swung with respect to the entire XY plane. Therefore, it is possible to surely correct all camera shakes assumed for a camera-equipped mobile phone or the like.

  In performing this camera shake correction, in this embodiment, the camera shake detection sensor 170 is mounted on the movable module 200 itself, and the control unit (not shown) is configured so that the angular velocity detected by the camera shake detection sensor 170 is zero. The camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y are closed-loop controlled. In addition, the control unit (not shown) controls the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnet so that the integrated value of the angular velocity detected by the camera shake detection sensor 170, that is, the angular displacement becomes zero. The drive mechanism 250y is controlled in a closed loop.

  Thus, in this embodiment, since the movable module 1 is swung around the support mechanism 400 configured on the rear side of the movable module 1, the deformation of the flexible substrate 300 is extremely small. Accordingly, since the shape restoring force when the flexible substrate 300 is deformed is small, the movable module 1 can be swung quickly.

  Here, when the swing fulcrum of the support mechanism 400 is used as a reference, the position in the Z-axis direction of the magnetic center position at which the magnetic force acts on the movable module 1 is separated from the center of the movable module 1 in the Z-axis direction. In the position. Therefore, there is an advantage that the magnetic drive force required for the first camera shake correction magnetic drive mechanism 250x and the second camera shake correction magnetic drive mechanism 250y to swing the movable module 1 may be small.

  On the other hand, when the swing fulcrum of the support mechanism 400 is used as a reference, the position in the Z-axis direction of the magnetic center position at which the magnetic force acts on the movable module 1 is the center of the movable module 1 in the Z-axis direction. If it is in a closer position, the movable module 1 can be swung greatly with a slight displacement, and there is an advantage that the response of hand shake correction is excellent.

(Configuration of movable range limiting mechanism for movable module 1)
FIG. 13 is an explanatory diagram of members that limit the movable range of the movable module 1 in an optical unit with a shake correction function to which the present invention is applied. FIGS. 13 (a), (b), (c), and (d) The perspective view seen from the front side, the perspective view seen from the rear side, the exploded perspective view seen from the front side, respectively, the state in which the rear side stopper member and the front side stopper member are arranged in the movable module of the optical unit with shake correction function to which the present invention is applied, It is the disassembled perspective view seen from the rear side. FIG. 14 is an explanatory diagram of the movable range of the movable module 1 in the optical unit with a shake correction function to which the present invention is applied. FIGS. 14A, 14B, and 14C are shakes to which the present invention is applied. In the optical unit with a correction function, a plan view of a state in which the rear stopper member is disposed on the movable module as viewed from the front side, a Y2-Y2 ′ cross-sectional view passing through the vicinity of the corner of FIG. 1A, and the corner of FIG. It is X2-X2 'sectional drawing which passes near.

  As shown in FIGS. 4, 5, 6, 7, and 13, in this embodiment, a rectangular frame-shaped front stopper member 290 and a rear stopper member 270 are arranged around the movable module 1, By these front side stopper member 290 and rear side stopper member 270, the movable module 1 is bidirectional in the X axis direction, bidirectional in the Y axis direction, bidirectional in the Z axis direction, bidirectional in the X axis direction, and in the Y axis direction. The movable range in both directions and around the Z axis is limited.

  That is, as shown in FIGS. 14A, 14 </ b> B, and 14 </ b> C, when viewed from the front side, the rear stopper 270 has four corner portions at the corner portions of the movable module 1 in the X-axis direction. And an inner wall 272a facing the protrusion 103 protruding in the Y-axis direction via a slight gap GX1 in the X-axis direction, and an inner wall facing the protrusion 103 via a slight gap GY1 in the Y-axis direction. 272b. Accordingly, the bidirectional movable range of the movable module 1 in the X-axis direction, in the Y-axis direction, in the bidirectional direction around the X axis, in the bidirectional direction around the Y axis, and in the bidirectional direction around the Z axis is limited. Next, as shown in FIGS. 14B and 14C, the rear stopper 270 includes a plate-like portion 274 that faces the protrusion 103 on the rear side in the Z-axis direction, and the front stopper 290 is A corner portion 297 of the frame portion faces the protrusion 103 on the front side in the Z-axis direction. For this reason, the bidirectional movable range in the Z-axis direction of the movable module 1 is limited.

  Here, the front side stopper member 290 and the rear side stopper member 270 are made of resin, and are provided with shock absorption and vibration absorption, unlike metal. For this reason, even if the movable module 1 comes into contact with the front stopper member 290 and the rear stopper member 270, no excessive sound or vibration is generated.

  Further, in the support mechanism 400 shown in FIGS. 4, 5, and 12, the support protrusion 227 of the base 220 is fitted in the concave portion 187 of the sensor cover 180, and in this embodiment, the support module 400 also uses the support mechanism 400. Bidirectional movable ranges in the X-axis direction and in the Y-axis direction are limited. That is, as shown in FIG. 4, there is only a slight gap GX2 in the X-axis direction between the outer peripheral surface of the support protrusion 227 and the inner peripheral surface of the recess 187, and a slight amount in the Y-axis direction. Only the gap GY2 is vacant.

  Further, in the support mechanism 400 shown in FIGS. 4, 5, and 12, the small protrusion 227 a of the support protrusion 227 of the base 220 abuts on the bottom lower surface 187 a of the recess 187, and even in this support mechanism 400, Movement to the rear of the direction is restricted. Here, when the movable module 1 is suddenly displaced to the rear side in the Z-axis direction due to an impact such as dropping, the small projection is maintained until the projection 103 of the movable module 1 contacts the plate-like portion 274 of the rear stopper 270. The load on 227a and the bottom lower surface 187a of the recess 187 is concentrated, and the small protrusion 227a and the bottom lower surface 187a of the recess 187 may be deformed. However, in this embodiment, since the support protrusion 227 is formed at the tip end portion of the leaf spring portion 229 formed on the base 220, the entire support mechanism 400 is moved when displaced to the rear side in the Z-axis direction of the movable module 1. Displacement in the Z-axis direction. For this reason, when an impact such as dropping is applied, even if the load on the small protrusion 227a and the bottom lower surface 187a of the recess 187 is concentrated, the small protrusion 227a and the bottom lower surface 187a of the recess 187 are not likely to be deformed.

  Here, as shown in FIGS. 4A and 4B, the leaf spring portion 229 is positioned on the front side by a predetermined dimension G10 with respect to the rear surface of the base 220 and the rear end edge of the fixed cover 260. For this reason, even if the movable module 1 is suddenly displaced to the rear side in the Z-axis direction due to an impact such as dropping, and the leaf spring part 229 is displaced to the rear side, the leaf spring part 229 remains on the rear surface of the base 220 or the fixed cover 260. It does not protrude rearward from the rear edge.

(Effect by arrangement of flexible substrate 300)
In the optical unit 200 with shake correction function of the present embodiment, the flexible substrate 300 includes the first folded portion 301 and the second folded portion 302 between the portion 330 a pulled out from the movable module 1 and the portion 350 a fixed to the fixed body 210. Is formed. Therefore, the deformation of the flexible substrate 300 that occurs when the movable module 1 is swung for camera shake correction is absorbed and suppressed by the first folded portion 301 and the second folded portion 302. As a result, since the stress generated in the flexible substrate 300 can be reduced, it can be suppressed or avoided that this stress acts on the movable module 1 and hinders its proper oscillation. Further, since the first folded portion 301 and the second folded portion 302 are bent, the deformation of the flexible substrate 300 when the movable module 1 is swung is reduced, so that the stress generated in the flexible substrate 300 is also reduced. As a result, the force required to swing the movable module 1 can be reduced, so that the movable module 1 can be swung quickly.

  Here, as shown in FIG. 1 (c), the optical unit 200 with a shake correction function generally has the Z axis oriented horizontally when taking a picture. Therefore, as a camera shake when the shutter is pressed, The frequency of vertical runout is high. On the other hand, in the first folded portion 301 and the second folded portion 302, the flexible substrate 300 drawn in the Y-axis direction is folded in the Z-axis direction. In addition, since the second folded portion 302 has a C-shaped cross-sectional shape in the YZ plane and is easily bent, the deformation of the flexible substrate 300 can be absorbed when the movable module 1 is swung around the X axis. Therefore, the movable module 1 can be swung quickly and accurately when the vertical shake around the X axis is corrected.

  In this embodiment, the flexible substrate 300 includes the two folded portions 301 and 302 between the portion 330a pulled out from the movable module 1 and the portion 350a fixed to the fixed body 210. The fold-up portion may be one portion of the second fold-up portion 302, and in this case, the flexible substrate 300 is drawn in the U-shape as a whole. Is done. Further, the folded portion can be provided at three or more locations.

  Next, in this embodiment, the flexible substrate 300 includes the first fold portion 301, the second fold portion 302, and the second fold portion 302 through the first flat plate portion 310 to the second fold portion 302. Since the slit 300a and the holes 310a and 320a are formed so as to be continuous, the width in the X-axis direction is narrowed by the amount formed. As a result, deformation in the X-axis direction, which is the width direction, is facilitated, and the stress generated by the flexible substrate 300 and acting on the movable module 1 is also reduced by this deformation.

  In addition, since the shape in which the slit 300a and the holes 310a and 320a are formed is symmetric with respect to the Y axis, the flexible substrate 300 can be used even when the movable module 1 swings in any direction around the Y axis. The stress acting on the movable module 1 generated in the above becomes equivalent. As a result, the stress generated in the flexible substrate when the movable module 1 is swung around the Y axis can be prevented from acting on the movable module 1 in a balanced manner and affecting the swing. Camera shake correction can be performed reliably.

(Example of narrowing the folded part width)
Here, even if only the second folded portion 302 that is formed in a C shape is the portion that narrows the width in the X-axis direction, the deformation in the X-axis direction that is the width direction is facilitated, and the stress generated there Can be reduced.

  FIG. 15 is an explanatory view showing an example of the shape of the flexible substrate 300 that can be adopted when the width of the second folded portion 302 is narrowed. 15A is a cross-sectional view showing a state in which the second folded portion 302 is opened, and a right-side view is a cross-sectional view showing a state in which the second folded portion 302 is formed. 15B to 15E are plan views showing a state in which the second folded portion 302 is opened, and a right view is a plan view showing a state in which the second folded portion 302 is formed. Each figure on the right side and the figure on the left side correspond to the left and right sectional views of FIG.

  In the example shown in FIG. 15B, the width of the second folded portion 302 is reduced by forming a cutout portion 302a in which the flexible substrate 300 is cut out on one side in the X-axis direction. In FIG. 15C, the width of the second folded portion 302 is reduced by forming notched portions 302b and 302c obtained by notching the flexible substrate 300 from both sides in the X-axis direction. 15D and 15E, the rectangular opening 302d or the elliptical opening 302e is formed in the central portion of the flexible substrate 300 in the X-axis direction, thereby reducing the width of the second folded portion 302. ing. In the example shown in FIGS. 15C to 15E, the shape of the flexible substrate 300 whose width in the X-axis direction is narrowed is symmetric with respect to the Y-axis. The stress generated in the flexible substrate 300 and acting on the movable module 1 is equal even when it swings in any direction around it.

(Reference example)
In the above embodiment, one flexible substrate 300 in which the first and second folded portions 301 and 302 are formed is pulled out from the movable module 1 in the Y-axis direction. Also, by pulling out at equal angular intervals around the optical axis L, it is possible to suppress the stress generated in each flexible substrate from acting on the movable module 1 and affecting its oscillation. .

  FIG. 16A is a perspective view showing the optical unit 200A with shake correction function of this example, and FIGS. 16B and 16C each show the optical unit 200A with shake correction function shown in FIG. , A schematic longitudinal sectional view schematically showing the main part when cut at a position corresponding to the line Y1-Y1 ′, and a schematic view showing the main part when cut at a position corresponding to the line X1-X1 ′. FIG. Since this example has the same configuration as that of the above embodiment, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 16A to 16C, in this example, notches 262b are formed at rear end edges of the four side plate portions 262 (1) to 262 (4) constituting the fixed cover 260, respectively. (1) to 262b (4) are formed, and four flexible substrates 600 (1) to (4) having the same shape are drawn out from these notches 262b (1) to (4). Yes. As a whole, the flexible substrates 600 (1) to (4) include the image pickup element 15 and the lens driving coils 30s and 30t, the shake detection sensor 170 and the shake correction magnetic drive mechanism mounted on the lens drive module 1a and the outside. It bears the function of performing electrical connection.

  As shown in FIGS. 16B and 16C, the flexible substrates 600 (1) and (3) are drawn from the rear portion of the movable module 1 to one side and the other side in the Y-axis direction. The side plate portions 262 (1) and (3) are fixed to each other. The flexible substrates 600 (2) and (4) are drawn from the rear portion of the movable module 1 toward one side and the other side in the X-axis direction, and are connected to the side plate portions 262 (2) and (4). Each is fixed. Each flexible substrate 600 (1) to (4) is drawn from the same position in the Z-axis direction.

  According to this example, the four flexible substrates 600 having the same shape drawn out from the movable module 1 and fixed to the fixed body 210 are drawn out at equal angular intervals around the optical axis. Therefore, when the movable module 1 is swung in one direction around the X axis and in the other direction, the stress acting on the movable module 1 is the same when the flexible substrate 600 is deformed. It becomes. Similarly, the movable module generated by the deformation of the flexible substrate 600 between the case where the movable module 1 is swung in one direction around the Y axis and the other direction for shake correction. The stress acting on 1 is the same. As a result, the stress generated in the flexible substrate 600 when the movable module 1 is swung can be prevented from acting on the movable module 1 in a balanced manner and affecting the swing. It is possible to suppress or avoid the inhibition of proper swinging. Therefore, shake correction can be performed accurately.

  Further, since the four flexible substrates 600 are pulled out from the movable module 1 at equal angular intervals and are fixed to the fixed body 210, in a state where the movable module 1 is not swung, depending on the rigidity of each flexible substrate 600, The movable module 1 is supported in an accurate posture with respect to the fixed body 210. As a result, since the offset of the tilt of the movable module 1 is eliminated, the angle at which the shake can be corrected increases.

Here, in order to pull out the four flexible substrates 600 of the same shape from the movable module 1, the four flexible substrates 600 may include dummy flexible substrates on which no wiring pattern is formed. . Further, if the plurality of flexible substrates 600 are drawn from the movable module 1 at equal angular intervals with the optical axis as the center, the number of the flexible substrates 600 may be two, three, or more than four.
(Other embodiments)
In the above embodiment, the present invention is applied to the optical unit 200 with a shake correction function using the lens driving module 1a in which the lens driving coils 30s and 30t are square cylinders and the lens driving magnet 17 is a flat plate. The present invention is applied to an optical unit with a shake correction function using a movable module having a configuration in which the driving coils 30s and 30t are cylindrical, the case 18 is a rectangular tube, and the lens driving magnet 17 is disposed at the corner of the case 18. You may apply.

  In the above embodiment, the example in which the present invention is applied to the optical unit 200 with the shake correction function used in the camera-equipped mobile phone has been described. However, the example in which the present invention is applied to the optical unit 200 with the shake correction function used in a thin digital camera or the like. May be explained. Moreover, in the said form, in addition to the lens 121 and the image pick-up element 15 in the movable module 1, the lens drive mechanism 5 which magnetically drives the moving body 3 containing the lens 121 in the direction of the optical axis L is supported on the support body 2. However, the present invention may be applied to a fixed focus type optical unit with a shake correction function in which the lens driving mechanism 5 is not mounted on the movable module 1.

  Furthermore, the present invention may be applied not only to photographing but also to an optical device that emits light, such as a laser pointer, a portable or vehicle-mounted projection display device.

It is explanatory drawing which shows the whole optical unit with a shake correction function to which this invention is applied. It is explanatory drawing of the lens drive module comprised in the movable module of the optical unit with a shake correction function to which this invention is applied. It is explanatory drawing which shows typically operation | movement of the lens drive module shown in FIG. It is explanatory drawing which shows the cross-sectional structure of the optical unit with a shake correction function to which this invention is applied. It is explanatory drawing which shows the cross-sectional structure at the time of cut | disconnecting the optical unit with a shake correction function to which this invention is applied in a position different from FIG. It is the disassembled perspective view which looked at the optical unit with a shake correction function to which the present invention is applied from the front side. It is the disassembled perspective view which looked at the optical unit with a shake correction function to which the present invention is applied from the rear side. It is explanatory drawing of the movable module of the optical unit with a shake correction function to which this invention is applied, and the member connected to this movable module. It is the disassembled perspective view which looked at the movable module and flexible substrate which were used for the optical unit with a shake correction function to which the present invention is applied from the front side. It is the disassembled perspective view which looked at the movable module and flexible substrate which were used for the optical unit with a shake correction function to which the present invention is applied from the rear side. It is explanatory drawing of the member which comprises a support mechanism etc. in the optical unit with a shake correction function to which this invention is applied. (A), (b) is explanatory drawing and sectional drawing which looked at the base of the optical unit with a shake correction function to which this invention was applied, a spring member, and the sensor cover from the X-axis direction, respectively. It is explanatory drawing of the member which restrict | limits the movable range of a movable module in the optical unit with a shake correction function to which this invention is applied. It is explanatory drawing of the mechanism which restrict | limits the movable range of a movable module in the optical unit with a shake correction function to which this invention is applied. It is explanatory drawing which showed the example of the shape of the flexible substrate 300 employable when forming the width | variety of a 2nd folding part narrowly. (A) is a perspective view which shows 200 A of optical units with a shake correction function which employ | adopted the reference example of arrangement | positioning of a flexible substrate, (b), (c) is the schematic longitudinal cross-sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Movable module 1a Lens drive module 160 Module cover 170 Camera shake detection sensor 180 Sensor cover 200, 200A Optical unit 210 with a camera shake correction function Fixed body 220 Base 230x Camera shake correction coil (first camera shake correction coil)
230y Hand shake correction coil (second shake correction coil)
240x image stabilization magnet (first image stabilization magnet)
240y image stabilization magnet (second image stabilization magnet)
250x First shake correction magnetic drive mechanism 250y Second shake correction magnetic drive mechanism 260 Fixed cover 270 Rear stopper member 280 Spring member (biasing means)
290 Front stopper member 300, 600 Flexible substrate 301, 302, 303 Folded part 330a Draw part 350a Fixed part 400 Support mechanism

Claims (3)

At least a movable module on which a lens is mounted, a fixed body that supports the movable module, a shake detection sensor that detects swinging of the movable module, and the movable module that is fixed based on a detection result of the shake detection sensor In an optical unit with a shake correction function having a shake correction mechanism that swings on the body and corrects the shake of the movable module,
Between the movable module and the fixed body, there is configured a pivot portion that can swing the movable module with respect to the fixed body,
When the three directions orthogonal to each other in the fixed body are the X axis, the Y axis, and the Z axis, respectively, and the direction along the optical axis is the Z axis,
Comprising a flexible substrate drawn from the movable module in the Y-axis direction and fixed to the fixed body;
The flexible substrate is folded in the Z-axis direction between a portion pulled out from the movable module and a portion fixed to the fixed portion, whereby a folded portion having a C-shaped cross section in the YZ plane and the folded portion. A flat plate portion connected to the drawer part through an overlapping portion,
The folded portion has a smaller width in the X-axis direction than the other portions of the flexible substrate,
In the folded portion, an opening is formed in the central portion in the X-axis direction,
A hole is formed in the flat plate portion,
The pivot portion is disposed inside the hole;
The optical unit with a shake correction function, wherein the hole is continuous with the opening . The optical unit with a shake correction function according to claim 1, wherein the shape of the folded portion is symmetric about the Y axis. 3. The shake correction according to claim 1, wherein when the Z-axis is horizontal, the rotation of the movable module about the X-axis is a pitching and the rotation about the Y-axis is a rolling. 4. Optical unit with function.

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