WO2011155316A1 - 振れ補正機能付き光学ユニット - Google Patents

振れ補正機能付き光学ユニット Download PDF

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Publication number
WO2011155316A1
WO2011155316A1 PCT/JP2011/061816 JP2011061816W WO2011155316A1 WO 2011155316 A1 WO2011155316 A1 WO 2011155316A1 JP 2011061816 W JP2011061816 W JP 2011061816W WO 2011155316 A1 WO2011155316 A1 WO 2011155316A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
shake correction
optical unit
correction function
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/061816
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
和出達貴
浅川新六
南澤伸司
柳澤克重
濱田吉博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Instruments Corp
Original Assignee
Nidec Sankyo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec Sankyo Corp filed Critical Nidec Sankyo Corp
Priority to US13/702,487 priority Critical patent/US8860828B2/en
Priority to CN201180028200.2A priority patent/CN102934021B/zh
Publication of WO2011155316A1 publication Critical patent/WO2011155316A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • H04N23/682—Vibration or motion blur correction
    • H04N23/685—Vibration or motion blur correction performed by mechanical compensation
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • H04N23/682—Vibration or motion blur correction
    • H04N23/685—Vibration or motion blur correction performed by mechanical compensation
    • H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G03B2205/0023—Movement of one or more optical elements for control of motion blur by tilting or inclining one or more optical elements with respect to the optical axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

Definitions

  • the present invention relates to an optical unit with a shake correction function mounted on a mobile phone with a camera or the like.
  • an optical unit for photographing includes a moving body including a lens, a lens driving mechanism for focusing that magnetically drives the moving body in the optical axis direction, and an imaging unit in which an imaging element is supported on a support.
  • the imaging unit is configured as a movable module that can be swung on the fixed body in order to suppress disturbance of a captured image due to a user's camera shake, and between the imaging unit (movable module) and the fixed body.
  • a shake correction drive mechanism using a permanent magnet and a single air-core coil is configured (see Patent Document 1).
  • Such a problem is not limited to correcting camera shake in an optical unit for imaging, but is a problem common to all cases of correcting shake in an optical unit.
  • an object of the present invention is to provide a shake correction function capable of minimizing the increase in assembly man-hours even when a shake correction drive mechanism is provided between the movable module and the fixed body. It is to provide an optical unit.
  • the shake correction drive mechanism includes a plurality of permanent magnets provided at locations spaced apart in the circumferential direction around the optical axis of the optical element on the outer peripheral surface of the movable module; A sheet-like coil integrally extending with a plurality of coil portions facing the permanent magnet and terminal portions electrically connected to the coil portions, extending in the circumferential direction in the fixed body; To do.
  • the optical unit with a shake correction function optical unit
  • permanent magnets are provided at a plurality of positions spaced apart in the circumferential direction around the optical axis on the outer peripheral surface of the movable module, and the fixed body extends in the circumferential direction.
  • the sheet-like coil provided with the some coil part which opposes a permanent magnet is provided.
  • a sheet-like coil is used, and in the case of such a sheet-like coil, a plurality of coil parts are provided integrally with the terminal part. Even when the coil portions are arranged at a plurality of locations, the sheet-like coil may be extended around the optical axis. Therefore, unlike the case of using a single air-core coil, it is not necessary to arrange coil portions at each of a plurality of locations around the optical axis and make electrical connection to each of them, so that the number of assembly steps can be reduced.
  • the coil section may employ a configuration in which a plurality of wiring layers are laminated on an insulating film via an insulating film. According to such a configuration, the distance between the movable module and the fixed body can be reduced as compared with the case where an air-core coil is used. Therefore, it is possible to reduce the size of the optical unit.
  • the sheet coil is fixed to a substrate opposite to the permanent magnet and a surface of the substrate opposite to the side facing the permanent magnet to form a plurality of voids constituting the coil portion.
  • a configuration including a core coil can be employed.
  • the terminal portion is directed to the outer side opposite to the side facing the permanent magnet in the sheet coil. According to this configuration, electrical connection to the coil portion can be easily performed.
  • the movable module may employ a configuration in which a movable range in a direction intersecting the optical axis is regulated by contact between the sheet coil and the permanent magnet.
  • a sheet-like coil unlike the air-core coil, the winding cannot be unwound even if it comes into contact with the permanent magnet, so the movable range of the movable module is regulated by bringing the sheet-like coil itself into contact with the permanent magnet. Can be used to do.
  • a resin layer is formed on a surface of the permanent magnet that faces the sheet-like coil. According to this configuration, when the movable range of the movable module is regulated by bringing the sheet-shaped coil and the permanent magnet into contact with each other, it is possible to reliably prevent the sheet-shaped coil and the permanent magnet from being damaged.
  • the distance between the permanent magnet and the sheet-like coil is increased as the distance from the swing center of the movable module in the optical axis direction increases.
  • the permanent magnet and the sheet-like coil face each other in parallel, and the average distance between the permanent magnet and the coil portion becomes narrow. It is possible to efficiently generate a force for swinging.
  • the permanent magnet and the sheet coil come into contact with each other, it is possible to avoid the corner portion of the permanent magnet from coming into strong contact with the sheet coil, so that the sheet coil and the permanent magnet can be reliably damaged. Can be prevented.
  • the coil portion has a first region in which the direction of the magnetic lines of force generated by the permanent magnet is substantially away from the swing center of the movable module and / or the direction of the magnetic lines of force extends to the swing center. It is preferable that the second region is disposed in the second direction. According to such a configuration, the direction of the electromagnetic force generated by supplying current to the coil portion substantially coincides with the tangential direction of the circle passing through the coil portion with the oscillation center as the center. That is, the direction of the electromagnetic force generated by supplying the current to the coil portion substantially coincides with the direction of generating the swinging force for swinging the movable module about the swinging center. Therefore, it is possible to increase the driving force of the shake correction driving mechanism by effectively using the magnetic flux generated by the permanent magnet.
  • the movable module may employ a configuration that holds an imaging element and a lens as the optical element.
  • permanent magnets are provided at a plurality of positions spaced apart in the circumferential direction around the optical axis on the outer peripheral surface of the movable module, and the permanent magnet extends in the circumferential direction to extend the permanent magnet.
  • a sheet-like coil having a plurality of coil portions facing each other is provided.
  • the sheet-like coil is used in the present invention, the distance between the movable module and the fixed body can be reduced as compared with the case where the air-core coil is used. Therefore, the size of the optical unit can be reduced.
  • the sheet-like coil since a plurality of coil portions are provided integrally with the terminal portion, the sheet-like coil extends around the optical axis even when the coil portions are arranged at a plurality of locations around the optical axis. Just do it. Therefore, unlike the case of using an air-core coil, it is not necessary to arrange coil portions at each of a plurality of locations around the optical axis and make electrical connection to each, so that the number of assembly steps can be reduced. Therefore, even when a shake correction drive mechanism is provided between the movable module and the fixed body, an increase in size and an increase in assembly man-hour can be minimized.
  • Imaging unit movable module
  • Lens optical element
  • Image sensor optical element
  • Lens drive mechanism 100
  • Optical unit 180 Oscillating fulcrum 200
  • Fixed body 250
  • Upper cover (fixed body) 410
  • Flexible wiring board 500
  • Shake correction drive mechanism 500x X side shake correction drive mechanism
  • 500y Y side shake correction drive mechanism 520
  • Permanent magnet 550
  • Sheet coil 560 Coil portion 600
  • Spring member 700 Lower cover (fixed body)
  • rotation around the X axis corresponds to so-called pitching (pitch)
  • rotation around the Y axis corresponds to so-called yawing (roll)
  • Z axis The rotation around corresponds to so-called rolling.
  • + X is attached to one side of the X axis
  • -X is attached to the other side
  • + Y is attached to one side of the Y axis
  • -Y is attached to the other side
  • one side of the Z axis is attached.
  • + Z is attached to the side (opposite the subject side)
  • -Z is attached to the other side (subject side).
  • FIG. 1 is an explanatory view schematically showing a state in which an optical unit with a shake correction function to which the present invention is applied is mounted on an optical device such as a mobile phone.
  • FIG. 2 is a perspective view showing an appearance and the like of an optical unit with a shake correction function to which the present invention is applied.
  • FIGS. 2A and 2B are perspective views of the optical unit as viewed from the subject side.
  • FIG. 6 is a perspective view of the optical unit when viewed from the side opposite to the subject side.
  • An optical unit 100 (an optical unit with a shake correction function) illustrated in FIG. 1 is a thin camera used for an optical device 1000 such as a mobile phone with a camera, and is supported by a chassis 1100 (device main body) of the optical device 1000. It is mounted with.
  • a shake such as a hand shake occurs in the optical apparatus 1000 during shooting, the captured image is disturbed. Therefore, in the optical unit 100 of the present embodiment, as will be described later, a movable module including the imaging unit 1 is supported so as to be swingable within the fixed body 200, and a gyroscope (not shown) mounted on the optical unit 100 is supported.
  • a shake correction drive mechanism see FIG. 1) Not shown).
  • flexible wiring boards 410 and 420 for feeding power to the imaging unit 1 and the shake correction drive mechanism are drawn out to the optical unit 100.
  • Reference numeral 420 is electrically connected to an upper control unit or the like provided on the main body side of the optical apparatus 1000 via a common connector 490 or the like.
  • the flexible wiring board 410 also has a function of outputting a signal from the imaging unit 1. For this reason, since the flexible wiring board 410 has a large number of wires, a flexible wiring board 410 having a relatively wide width is used.
  • FIG. 3 is a cross-sectional view schematically showing the configuration of the imaging unit 1 mounted on the optical unit 100 with a shake correction function to which the present invention is applied.
  • FIG. 4 is an exploded perspective view of the imaging unit 1 mounted on the optical unit 100 with a shake correction function to which the present invention is applied.
  • the imaging unit 1 includes, for example, a plurality of lenses 1a (see FIG. 1) as optical elements in the A direction (front side) approaching the subject (object side) along the optical axis L direction. ), And an optical element unit that moves in both directions in the B direction (rear side) approaching the side opposite to the subject (imaging element side / image side), and has a substantially rectangular parallelepiped shape.
  • the imaging unit 1 generally includes a movable body 3 that holds a plurality of lenses 1a (see FIG. 1) and an optical element such as a fixed aperture inside, and a lens drive that moves the movable body 3 along the optical axis L direction.
  • the moving body 3 includes a cylindrical lens holder 12 that holds a lens 1 a and a fixed diaphragm (not shown), and a coil holder 13 that holds the lens holder 12 on the inner side.
  • the lens driving coils 30s and 30t constituting the lens driving mechanism 5 are held.
  • the support 2 is positioned on the side opposite to the subject side ( ⁇ Z side), and a spring holder 19 that holds a spring described later, and the substrate 15 is positioned on the side opposite to the subject side ( ⁇ Z side) with respect to the spring holder 19.
  • a rectangular plate-shaped substrate holder 16, a box-shaped case 18 that covers the spring holder 19 on the subject side, and a rectangular plate-shaped spacer 11 that is disposed inside the case 18 are provided.
  • the image sensor 1b is mounted on the substrate surface facing the surface.
  • the spring holder 19 holds a filter 1c such as an infrared filter.
  • incident windows 11a and 18a for taking in light from the subject into the lens 1a are formed.
  • windows 16a and 19a for guiding incident light to the image sensor 1b are formed in the center of the substrate holder 16 and the spring holder 19.
  • 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 a linkage magnetic field generator that generates a magnetic field interlinking the lens drive coils 30s and 30t together with the lens drive magnet 17 described later.
  • the lens driving mechanism 5 is configured together with the lens driving coils 30 s and 30 t wound around the outer peripheral surface of the coil holder 13.
  • the support body 2 and the moving body 3 are connected to each other via a spring member 14t and a metal spring member 14s provided at positions separated in the optical axis direction.
  • a spring member 14s is used on the imaging element 1b side
  • a spring member 14t is used on the subject side.
  • the spring members 14 s and 14 t have the same basic configuration, and an outer peripheral side connecting portion 141 held on the support body 2 side, an annular inner peripheral side connecting portion 142 held on the movable body 3 side, A narrow arm portion 143 that connects the outer peripheral side connecting portion 141 and the inner peripheral side connecting portion 142 is provided.
  • the outer peripheral side connecting part 141 is held by the spring holder 19, and the inner peripheral side connecting part 142 is connected to the imaging element side end of the coil holder 13 of the moving body 3.
  • the arm portion 143 extends in an arc shape in the circumferential direction.
  • the outer peripheral side connecting portion 141 is held by the spacer 11, and the inner peripheral side connecting portion 142 is connected to the subject side end 142 of the coil holder 13 of the moving body 3.
  • the arm portion 143 extends in an arc shape in the circumferential direction while meandering in the radial direction.
  • the moving body 3 is supported by the support body 2 via the spring members 14s and 14t so as to be movable in the direction of the optical axis.
  • 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. is there.
  • the spring member 14s is divided into two spring pieces, and each end of the lens driving coils 30s and 30t is connected to the spring piece.
  • terminals 14a and 14b are connected to the two spring pieces, respectively, and the spring member 14s also functions as a power supply member for the lens driving coils 30s and 30t.
  • a ring-shaped magnetic piece 61 is held at the subject side end of the coil holder 13, and the position of the magnetic piece 61 is a position on the subject side with respect to the lens driving magnet 17. For this reason, the magnetic piece 61 applies a biasing 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, at the time of non-energization (origin position), the lens holder 12 can be placed still on the image sensor 1b side by the attractive force of the lens driving magnet 17 and the magnetic piece 61.
  • the magnetic piece 61 acts as a kind of yoke, and can reduce leakage magnetic flux from a magnetic path formed between the lens driving magnet 17 and the lens driving coils 30s and 30t.
  • a rod-like or spherical magnetic body may be used as the magnetic piece 61. If the magnetic piece 61 is formed in a ring shape, there is an effect that the attractive force attracting the lens driving magnet 17 when the lens holder 12 moves in the optical axis direction is isotropic. Further, when the lens driving coils 30 s and 30 t are energized, the magnetic piece 61 moves in a direction away from the lens driving magnet 17, so that no extra force is exerted to press the lens holder 12 toward the image sensor 1 b. Therefore, the lens holder 12 can be moved in the optical axis direction with a small amount of electric power.
  • the lens 1a when viewed from the direction of the optical axis L, the lens 1a (see FIG. 1) is circular, but the case 18 used for the support 2 has a rectangular box shape. Accordingly, the case 18 includes a rectangular tube-shaped body portion 18c, and an upper plate portion 18b having an incident window 18a formed on the upper surface side of the rectangular tube-shaped body portion 18c.
  • a lens driving magnet 17 is fixed to a side surface corresponding to a square corner inside the rectangular cylindrical body portion 18c, and each of the lens driving magnets 17 is composed of a triangular prism-like permanent magnet.
  • Each of the four lens driving magnets 17 is divided into two in the direction of the optical axis, and in any case, the inner surface and the outer surface are magnetized to different poles. For this reason, the winding directions of the two lens driving coils 30 s and 30 t are opposite to each other around the coil holder 13.
  • the moving body 3 configured as described above is disposed inside the case 18.
  • the lens driving coils 30 s and 30 t each constitute the lens driving mechanism 5 so as to face the lens driving magnet 17 fixed to the inner surface of the rectangular tubular body 18 c of the case 18.
  • the moving body 3 is normally located on the imaging element side (one side in the Z-axis direction). In such a state, the moving body 3 is directed to the lens driving coils 30s and 30t in a predetermined direction.
  • the lens driving coils 30s and 30t each receive an electromagnetic force directed toward the subject side (the other side in the Z-axis direction). 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.
  • 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. .
  • FIG. 5 is a cross-sectional view showing the internal structure of the optical unit 100 with a shake correction function to which the present invention is applied.
  • FIGS. 5A and 5B are a YZ cross-sectional view of the optical unit 100 and the optical unit 100.
  • FIG. It is XZ sectional drawing of. In FIG. 5, only the case 18, the substrate holder 16, and the substrate 15 are illustrated for the imaging unit 1, and the other members are not illustrated.
  • FIG. 6 is an exploded perspective view of the optical unit 100 with a shake correction function to which the present invention is applied as viewed from the subject side.
  • FIG. 7 shows the optical unit 100 with a shake correction function to which the present invention is applied as viewed from the subject side. It is a disassembled perspective view when it sees from the opposite side.
  • the optical unit 100 includes a fixed body 200, an imaging unit 1, a spring member 600 that is supported by the fixed body 200 so as to be displaceable, and an imaging unit.
  • a shake correction drive mechanism 500 that generates a magnetic drive force that causes the imaging unit 1 to be displaced relative to the fixed body 200 between the unit 1 and the fixed body 200 is provided.
  • the outer peripheral portion of the imaging unit 1 is composed of a case 18 (see FIG. 4) used for the support 2 in the imaging unit 1.
  • the fixed body 200 includes an upper cover 250, a spacer 280, and a lower cover 700, and the upper cover 250 includes a rectangular tubular body 210 surrounding the imaging unit 1 and an opening on the subject side of the rectangular tubular body 210. And an end plate part 220 for closing the part.
  • the end plate 220 is formed with a window 220a through which light from the subject enters.
  • the end of the rectangular tubular body 210 opposite to the subject (+ Z side
  • a cutout 219 is formed at two locations facing each other in the Y-axis direction in the rectangular tubular body 210, and one of the two cutouts 219 in the Y-axis direction + Y cutout 219. Is used when the flexible wiring board 420 is connected to a terminal portion of a sheet coil 550 described later. Further, notches 218 used for engagement with a spacer 280 described later are formed on the four surfaces of the rectangular tube-shaped body portion 210, and two of the notches 218 located in the Y-axis direction are formed. The notch 218 is connected to the notch 219 to form an integral notch.
  • a notch 217 connected to the notch 218 is formed on the lower end side of two locations facing each other in the Y-axis direction.
  • the Y-axis The notch 217 on one side + Y in the direction is used to pull out the flexible wiring board 410 to the outside.
  • the spacer 280 includes a rectangular frame portion 281 that is sandwiched between the rectangular tubular body 210 of the upper cover 250 and the lower cover 700, and a columnar portion 283 that protrudes from the corner portion of the frame portion 281 toward the subject. , And an engaging protrusion 285 that protrudes outward at the side portion of the frame portion 281.
  • the engaging protrusion 285 is engaged with the notch 218 cut out in a square shape in the rectangular tube-shaped body 210 of the upper cover 250, and the spacer 280 and the Positioning with the cover 250 is performed.
  • the lower cover 700 is a press-processed product for a metal plate, and includes a substantially rectangular bottom plate portion 710 and four side plate portions 720 that stand from the outer peripheral edge of the bottom plate portion 710 toward the subject.
  • the side plate part 720 sandwiches the frame part 281 of the spacer 280 between the square cylindrical body part 210 of the upper cover 250.
  • a notch 728 is formed in the side plate portion 720 located on one side + Y in the Y-axis direction, and the center portion of the notch 728 has the side plate portion 720. A part is left as a plate-like protrusion 729.
  • a window-shaped notch 726 is also formed in the side plate portion 720 located on the other side ⁇ Y in the Y-axis direction of the side plate portion 720, and the side plate portion 720 is formed at the center of the notch 726. Is left as a crosspiece 727.
  • the cutout 728 is used to pull out the flexible wiring substrate 410 to the outside, as will be described later.
  • the cutout 726 interferes with the side plate portion 720 of the lower cover 700. It is used to prevent from doing.
  • the bottom plate portion 710 of the lower cover 700 has a hole 711 formed at the center thereof, and is positioned adjacent to the hole 711 on the other side ⁇ X in the X-axis direction and to the hole 711 in the Y-axis direction.
  • Concave portions 716 and 717 that are recessed in a rectangular shape are formed at adjacent positions on the other side.
  • the inner surfaces of the bottom portions 716a and 717a of the recesses 716 and 717 are substantially mirror surfaces, and the bottom portions 716a and 717a are the first photo reflector 580 and the second photo reflector mounted on the substrate surface of the substrate 15 opposite to the subject side. Used as a reflection surface for the reflector 590.
  • a swing fulcrum for swinging the imaging unit 1 between the imaging unit 1 and the lower cover 700 of the fixed body 200 180 is provided, and the imaging unit 1 is biased toward the lower cover 700 by the spring member 600 via the swing fulcrum 180.
  • the swing fulcrum 180 is constituted by a steel ball 181 positioned in a hole 711 formed in the bottom plate portion 710 of the lower cover 700 and a support plate 183 fixed to the bottom surface 151 of the substrate 15.
  • the imaging unit 1 can swing around the contact position between the steel ball 181 and the support plate 183 as a swing center.
  • the spring member 600 includes a fixed-side connection portion 620 that is sandwiched between the side plate portion 720 of the lower cover 700 and the frame portion 281 of the spacer 280 in the fixed body 200, and a movable-side connection portion 610 that is connected to the imaging unit 1.
  • the plate-like spring member is provided with a plurality of arm portions 630 extending between the movable side connecting portion 610 and the fixed side connecting portion 620, and both ends of the arm portion 630 are respectively connected to the movable side connecting portion 610 and the fixed portion. It is connected to the side connecting part 620.
  • the movable side connecting portion 610 of the spring member 600 is fixed to a step portion 168 formed on the outer peripheral side of the substrate holder 16 on the rear end side of the imaging unit 1.
  • the spring member 600 is made of a nonmagnetic metal such as beryllium copper or a nonmagnetic SUS steel material, and is formed by pressing a thin plate having a predetermined thickness or etching using a photolithography technique.
  • the imaging unit 1 is closer to the subject side than the steel ball 181. Is placed, the imaging unit 1 is pushed up to the subject side by the steel ball 181. Therefore, in the spring member 600, the movable side connecting portion 610 is pushed up to the subject side relative to the fixed side connecting portion 620, and the arm portion 630 of the spring member 600 moves the imaging unit 1 to the opposite side to the subject side. Energize.
  • the imaging unit 1 is biased toward the bottom plate portion 710 of the lower cover 700 by the spring member 600 via the swing fulcrum 180, and the imaging unit 1 can swing by the swing fulcrum 180. It will be in the state supported by the fixed body 200 in the state.
  • FIG. 8 is an explanatory diagram showing the configuration of a shake correction drive mechanism configured in the optical unit 100 with a shake correction function to which the present invention is applied, and FIGS. 8A and 8B are shake correction drive mechanisms.
  • FIG. 6 is a perspective view and a plan view of the camera when viewed from the subject side.
  • FIG. 9 is an explanatory diagram of a sheet-like coil used in the shake correction drive mechanism of the optical unit 100 with a shake correction function to which the present invention is applied, a perspective view when the sheet-like coil is viewed from the subject side, and the sheet It is a perspective view when a coil-like coil is seen from another angle.
  • the shake correction drive mechanism 500 is configured by the coil unit 560 and the permanent magnet 520 that generates a magnetic field linked to the coil unit 560.
  • flat permanent magnets 520 are respectively fixed to the four outer surfaces 18 e, 18 f, 18 g, and 18 h of the rectangular cylindrical body portion 18 c of the case 18.
  • Coil portions 560 are disposed on the inner surfaces 211, 212, 213, and 214 of the cylindrical body portion 210.
  • Permanent magnet 520 is magnetized with different poles on the outer surface side and inner surface side.
  • the coil part 560 is formed in the square frame shape, and an upper and lower long side part is utilized as an effective side.
  • the permanent magnets 520 and the coil portions 560 disposed at two positions sandwiching the imaging unit 1 on both sides in the Y-axis direction constitute a Y-side shake correction drive mechanism 500y.
  • the imaging unit 1 is swung about an axis line X0 extending in the X-axis direction through the swinging fulcrum 180.
  • the permanent magnet 520 and the coil portion 560 disposed at two positions sandwiching the imaging unit 1 on both sides in the X-axis direction constitute an X-side shake correction drive mechanism 500x, and an arrow Y1 in FIG.
  • the imaging unit 1 is swung around an axis Y0 extending in the Y-axis direction through the swing fulcrum 180.
  • sheet coils extending along the four inner surfaces 211, 212, 213, and 214 of the upper cover 250 are used.
  • 550 is used, and in the sheet-like coil 550, four coil portions 560 are integrally formed with a predetermined interval.
  • the sheet-like coil 550 has a shape extending in a band shape when unfolded, and is folded along the four inner surfaces 211, 212, 213, and 214 of the upper cover 250, and the inner surface 211 of the upper cover 250. To 214 by surface bonding or the like. In this state, both end portions 551 and 552 of the sheet coil 550 are close to each other through the slit 555.
  • the sheet-like coil 550 has a structure in which a coil portion 560 made of fine copper wiring is formed on a printed circuit board using a conductive wiring technique, and a plurality of layers of copper wiring (coil portion 560) is an insulating film. Are formed in multiple layers. The surface of the copper wiring (coil portion 560) is also covered with an insulating film.
  • an FP coil Fe Pattern Coil (registered trademark) manufactured by Asahi Kasei Electronics Corporation can be exemplified.
  • one end portion 551 of the sheet-like coil 550 is formed with a protruding portion 553 that protrudes in a rectangular shape on the opposite side to the subject side, and the protruding portion 553 includes four coil portions 560.
  • a plurality of terminal portions 565 are formed by the extending conductive layer.
  • the terminal portion 565 faces the outer side opposite to the inner side facing the permanent magnet 520 in the sheet-like coil 550.
  • a notch 219 is formed in the upper cover 250 at a portion overlapping the terminal portion 565.
  • the terminal part 565 (projection part 553) of the sheet-like coil 550 is exposed on the outer surface, the sheet-like coil 550 and the flexible wiring board 420 are directed toward the optical axis L in the notch 219.
  • the bent end portion 425 is electrically connected by solder or the like.
  • the imaging unit 1 is supported by the fixed body 200 so as to be swingable by the swing support point 180. Accordingly, when a large force is applied from the outside and the imaging unit 1 swings greatly, the arm portion 630 of the spring member 600 may be plastically deformed.
  • the sheet coil 550 and the permanent magnet 520 are opposed to each other through a narrow gap. In the case of the sheet-like coil 550, unlike the air-core coil, the winding cannot be unwound even if it contacts the permanent magnet 520.
  • the movable range in the X-axis direction and the Y-axis direction intersecting the optical axis L of the imaging unit 1 is regulated by the contact between the sheet-like coil 550 and the permanent magnet 520, No other stopper mechanism is provided to prevent the imaging unit 1 from swinging.
  • the Y-side shake correction drive mechanism 500 y swings the imaging unit 1 around the X axis about the swing fulcrum 180. Further, if the swing of the imaging unit 1 around the X axis and the swing around the Y axis are combined, the imaging unit 1 can be displaced with respect to the entire XY plane. Therefore, all shakes assumed in the optical unit 100 can be reliably corrected.
  • one end of the flexible wiring board 410 is connected to the substrate 15 of the imaging unit 1, and when the imaging unit 1 is swung, the flexible wiring board 410 is moved to the imaging unit 1.
  • the imaging unit 1 When a load is applied to the imaging unit 1, there is a problem in properly swinging the imaging unit 1.
  • the flexible wiring board 410 has a main body portion 415 positioned outside the optical unit 100 so that the connector 490 can be mounted and the flexible wiring board 420 can be connected, but the flexible wiring board 410 is positioned inside the optical unit 100.
  • the portion is a belt-like portion 411 having a narrower width dimension than the main body portion 415. Further, the belt-like portion 411 extends from one side + Y in the Y-axis direction toward the other side ⁇ Y, and then is folded back toward the one side + Y. After that, the end portion extends along the edge of the substrate 15. Is folded and fixed toward the substrate surface on the subject side.
  • the flexible wiring substrate 410 has a long dimension because the folded portion 413 is provided between the external main body portion 415 and the portion fixed to the substrate 15. Accordingly, the strip-like portion of the flexible wiring board 410 smoothly follows the shake of the imaging unit 1, so that a large element load is not applied to the imaging unit 1.
  • the strip-shaped portion 411 of the flexible wiring board 410 is formed with a slit 418 extending along the extending direction (Y-axis direction) of the strip-shaped portion 411 in the middle of the length direction.
  • the middle portion is divided into two narrow portions 416 and 417 in the width direction. For this reason, the rigidity of the strip-shaped portion 411 is relaxed. Accordingly, the strip-like portion of the flexible wiring board 410 smoothly follows the shake of the imaging unit 1, so that a large element load is not applied to the imaging unit 1.
  • the band-like portion 411 of the flexible wiring board 420 overlaps with the imaging unit 1 in the optical axis L direction, but the portion overlapping the swing fulcrum 180 is a circular hole 414 connected to the slit 418. For this reason, even if the belt-like portion 411 of the flexible wiring board 420 is arranged at a position overlapping the imaging unit 1 in the optical axis L direction, there is no problem in providing the swing fulcrum 180.
  • the side plate portion 720 located on one side + Y in the Y-axis direction among the side plate portions 720 of the lower cover 700 is formed with a notch 728 for pulling out the band-like portion 411 of the flexible wiring board 420.
  • a part of the side plate portion 720 is left as a plate-like protrusion 729 at the center portion.
  • an elliptical hole 419 is formed in the band-like portion 411 of the flexible wiring board 420 at a portion overlapping the plate-like protrusion 729. Therefore, when the strip-like portion 411 of the flexible wiring board 420 is pulled out from the notch 728 of the side plate portion 720, the plate-like protrusion 729 can be passed through the hole 419. There is no hindrance to pull out. Further, since the plate-like protrusion 729 is fitted into the hole 419, the band-like portion 411 of the flexible wiring board 420 can be positioned.
  • a window-shaped notch 726 is formed in the side plate portion 720 located on the other side ⁇ Y in the Y-axis direction among the side plate portions 720 of the lower cover 700.
  • the folded portion 413 of the flexible wiring board 410 is at the same height as the swing center of the imaging unit 1 at the swing fulcrum 180 (contact position between the steel ball 181 and the support plate 183). For this reason, the displacement of the belt-like portion 411 when the imaging unit 1 swings can be suppressed to a small value. Accordingly, since the influence of the flexible wiring board 410 on the imaging unit 1 can be reduced, the imaging unit 1 can be rocked with high accuracy.
  • the permanent magnets 520 are provided at a plurality of locations separated in the circumferential direction around the optical axis L on the outer peripheral surface of the imaging unit 1 that is a movable module.
  • the fixed body 200 is provided with a sheet-like coil 550 that includes a plurality of coil portions 560 that extend in the circumferential direction and face the permanent magnet 520. For this reason, when a shake such as a hand shake occurs in the optical unit 100, the imaging unit 1 can be swung by supplying power to the coil portion 560 of the sheet-like coil 550.
  • the inclination of the optical axis L can be corrected even if the optical unit 100 is shaken.
  • the distance between the imaging unit 1 and the fixed body 200 is set larger than that in the case where the air-core coil is used. Since it can be narrowed, the size of the optical unit 100 can be reduced.
  • the sheet-like coil 550 since the plurality of coil portions 560 are integrally provided with the terminal portion 565, even when the coil portions 560 are arranged at a plurality of locations around the optical axis L, the sheet-like coil 550 is light-transmitted. What is necessary is just to make it extend around the axis L.
  • the number of assembly steps can be reduced. Therefore, according to this embodiment, even when the shake correction drive mechanism 500 is provided between the imaging unit 1 and the fixed body 200, the increase in size and the increase in the number of assembly steps can be minimized.
  • the terminal portion 565 is directed to the outer side opposite to the side facing the permanent magnet 520, electrical connection to the coil portion 560, that is, a flexible wiring board to the terminal portion 565 is provided. 420 can be easily connected.
  • the movable range in the direction intersecting the optical axis L is regulated by the contact between the sheet coil 550 and the permanent magnet 520.
  • the winding cannot be unwound even if it abuts on the permanent magnet 520, so that the sheet-like coil 550 itself and the permanent magnet 520 abut.
  • it can be used to regulate the movable range of the imaging unit 1.
  • FIG. 10 is an explanatory diagram of an optical unit 100 with a shake correction function according to an improvement of the embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the above embodiment, the same reference numerals are given to common portions, and descriptions thereof are omitted.
  • the sheet coil 550 and the permanent magnet 520 are opposed to each other.
  • the interval between the permanent magnet 520 and the sheet-like coil 550 is separated in the optical axis L direction from the swing center of the imaging unit 1 (see FIG. 5 and the like).
  • the swing fulcrum 180 is on one side + Z (opposite to the subject side) in the Z-axis direction
  • the distance between the permanent magnet 520 and the sheet-like coil 550 is from the one side + Z in the Z-axis direction to the other. Widening toward the side -Z (toward the subject side).
  • the permanent magnet 520 and the sheet-like coil 550 face each other in parallel on the side where the imaging unit 1 is inclined, and the average of the permanent magnet 520 and the coil portion 560. Since the distance becomes narrow, the shake correction drive mechanism 500 can efficiently generate a force for swinging the imaging unit 1. Further, as shown in FIG. 10C, when the permanent magnet 520 and the sheet coil 550 are in contact, it is possible to avoid the corner portion of the permanent magnet 520 from being in contact with the sheet coil 550 strongly. Further, the sheet coil 550 and the permanent magnet 520 can be reliably prevented from being damaged.
  • FIG. 11 is an explanatory diagram of an optical unit 100 with a shake correction function according to another improved example of the embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the above embodiment, the same reference numerals are given to common portions, and descriptions thereof are omitted.
  • the sheet coil 550 and the permanent magnet 520 are opposed to each other.
  • the upper and lower long sides are used as effective sides.
  • the permanent magnet 520 is composed of a first magnet piece 521 and a second magnet piece 522 arranged in the optical axis direction, and is magnetized so that magnetic poles located on the coil portion 560 side are different. ing. For this reason, the magnetic force line which the permanent magnet 520 generate
  • the direction of the magnetic lines of force of the first magnet piece 521 is a first region that is substantially away from the swing fulcrum 180 (see FIG. 5). 31 is formed.
  • the second region 32 in which the direction of the magnetic lines of force of the second magnet piece 522 is substantially directed to the swing fulcrum 180 is provided.
  • the center CL3 of the coil portion 560 in the optical axis direction is disposed above the contact surface 527 between the first magnet piece 521 and the second magnet piece 521, and the permanent magnet 520 and the coil portion 560 are arranged.
  • the center CL3 of the coil portion 560 is disposed on the subject side farther from the swing fulcrum 180 in the optical axis direction than the contact surface 527 serving as the magnetic center of the permanent magnet 520.
  • the center CL4 of the long side portion 560a of the coil portion 560 is disposed closer to the subject than the center CL1 that is the magnetic center of the first magnet piece 521, and is longer than the center CL2 that is the magnetic center of the second magnet piece 521.
  • the center CL5 of the part 560b is disposed on the subject side. That is, the long side portion 560 a is arranged in the first region 31 and the long side portion 560 b is arranged in the second region 32.
  • the direction of the electromagnetic force F1 generated in the long side portion 560a when the current is supplied to the coil 560 is centered on the swing fulcrum 180 and passes through the long side portion 560a. It is almost the same as the tangential direction of the circle.
  • the direction of the electromagnetic force F2 generated in the long side portion 560b when current is supplied to the driving coil 560 is substantially the same as the tangential direction of a circle centering on the swing fulcrum 180 and passing through the long side portion 560b. I'm doing it.
  • the directions of the electromagnetic forces F1 and F2 generated in the coil unit 560 when current is supplied to the coil unit 560 are directions in which a swinging force for swinging the imaging unit 1 around the swinging fulcrum 180 is generated. It is almost coincident. Therefore, the driving force of the shake correction drive mechanism 500 can be increased by effectively using the magnetic flux generated by the permanent magnet 520.
  • the center CL3 of the coil portion 23 is arranged at a position farther from the swing fulcrum 180 in the optical axis direction than the contact surface 527 of the permanent magnet 520, and therefore the contact surface 527 of the permanent magnet 520.
  • the center CL3 of the coil part 23 are compared with a case where the imaging unit 1 is oscillated around the oscillating fulcrum 180 as compared with the case where the center CL3 of the coil portion 23 is disposed at an equivalent position from the oscillating fulcrum 180 in the optical axis direction. large. Therefore, the driving force of the shake correction driving mechanism 500 can be increased.
  • the long side portion 560a of the coil portion 560 is disposed in the first region 31, and the long side portion 560b of the coil portion 560 is disposed in the second region 32.
  • the driving force of the shake correction drive mechanism 500 can be further increased.
  • a resin layer may be formed on the surface of the permanent magnet 520 that faces the sheet coil 550.
  • the permanent magnet 520 is attached to the imaging unit 1 and then the surface of the permanent magnet 520 is coated with resin, or the permanent magnet 520 whose surface is coated with resin is attached to the imaging unit 1. Any of the configurations attached to the above may be adopted. At that time, in the former case, only the surface of the permanent magnet 520 is coated with resin. In the latter case, it is possible to realize a configuration in which only the surface of the permanent magnet 520 is coated with resin, or a configuration in which the surface of the permanent magnet 520 and the back surface (surface on the imaging unit 1 side) are coated with resin.
  • the sheet-like coil 550 (FP coil) having the coil portion 560 having a configuration in which a plurality of wiring layers are laminated via an insulating film on the substrate is used.
  • a sheet-like coil 550 may be used which includes a substrate and a plurality of air-core coils that are fixed to a surface of the substrate opposite to the side facing the permanent magnet and constitute the coil portion 520.
  • the present invention may be applied to the optical unit 100 used in the camera-equipped mobile phone.
  • the present invention may be applied to the optical unit 100 used in a thin digital camera or the like.
  • the lens drive mechanism 5 which magnetically drives the moving body 3 containing the lens 1a to an optical axis direction is supported on the support body 2 in the imaging unit 1.
  • the present invention may be applied to a fixed focus type optical unit in which the lens driving mechanism 5 is not mounted on the imaging unit 1.
  • the optical unit 100 with a shake correction function to which the present invention is applied is fixed in a device having vibrations at regular intervals, such as a refrigerator or the like, in addition to a mobile phone, a digital camera, etc. It can also be used for a service that can obtain information inside the refrigerator when going out, for example, when shopping. In such a service, since it is a camera system with a posture stabilization device, a stable image can be transmitted even if the refrigerator vibrates. Further, the present apparatus may be fixed to a device worn at the time of attending school, such as a child, a student's bag, a school bag or a hat.
  • the guardian or the like can observe the image in a remote place to ensure the safety of the child.
  • a clear image can be taken even if there is vibration during movement without being aware of the camera.
  • a GPS is installed in addition to the camera module, the location of the target person can be acquired at the same time. In the event of an accident, the location and situation can be confirmed instantly.
  • the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front can be photographed in an automobile, it can be used as a drive recorder.
  • the optical unit 100 with a shake correction function to which the present invention is applied is mounted at a position where the front of the vehicle can be photographed, and peripheral images are automatically photographed at regular intervals and automatically transferred to a predetermined server. Also good. Further, by distributing this image in conjunction with traffic jam information such as car navigation VICS (Vehicle Information and Communication System), it is possible to provide a more detailed traffic situation. According to such a service, it is possible to record the situation at the time of an accident or the like by an unintended third party and use it for inspection of the situation as in the case of a drive recorder mounted on a car. In addition, a clear image can be acquired without being affected by the vibration of the automobile. In such an application, when the power is turned on, a command signal is output to the control unit, and shake control is started based on the command signal.
  • VICS Vehicle Information and Communication System
  • the optical unit 100 with a shake correction function to which the present invention is applied may be applied to shake correction of an optical device that emits light, such as a laser pointer, a portable or vehicle-mounted projection display device, or a direct-view display device. Good. Further, it may be used for observation without using an auxiliary fixing device such as a tripod for observation at a high magnification such as an astronomical telescope system or a binoculars system. In addition, by using a sniper rifle or a gun barrel such as a tank, the posture can be stabilized against vibration at the time of triggering, so that the accuracy of hitting can be improved.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Studio Devices (AREA)
PCT/JP2011/061816 2010-06-08 2011-05-24 振れ補正機能付き光学ユニット Ceased WO2011155316A1 (ja)

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US13/702,487 US8860828B2 (en) 2010-06-08 2011-05-24 Optical unit with shake correcting function
CN201180028200.2A CN102934021B (zh) 2010-06-08 2011-05-24 带抖动修正功能的光学单元

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JP2010131388A JP5755414B2 (ja) 2010-06-08 2010-06-08 振れ補正機能付き光学ユニット

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WO2010044195A1 (ja) * 2008-10-14 2010-04-22 日本電産サンキョー株式会社 撮影用光学装置
JP2010117708A (ja) * 2008-10-14 2010-05-27 Nidec Sankyo Corp 撮影用光学装置

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EP2670128A1 (en) * 2012-05-29 2013-12-04 Sony Corporation Image blur correction apparatus and imaging apparatus
CN104854504A (zh) * 2012-12-11 2015-08-19 日本电产三协株式会社 光学装置
CN105824165A (zh) * 2015-01-26 2016-08-03 日本电产三协株式会社 带抖动校正功能光学单元

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US8860828B2 (en) 2014-10-14
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