WO2010044221A1 - Unité optique équipée d’une fonction de correction de balancement - Google Patents

Unité optique équipée d’une fonction de correction de balancement Download PDF

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Publication number
WO2010044221A1
WO2010044221A1 PCT/JP2009/005237 JP2009005237W WO2010044221A1 WO 2010044221 A1 WO2010044221 A1 WO 2010044221A1 JP 2009005237 W JP2009005237 W JP 2009005237W WO 2010044221 A1 WO2010044221 A1 WO 2010044221A1
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WO
WIPO (PCT)
Prior art keywords
movable module
shake correction
shake
optical unit
module
Prior art date
Application number
PCT/JP2009/005237
Other languages
English (en)
Japanese (ja)
Inventor
武田正
唐沢敏行
武居勇一
石原久寛
長田章弘
南澤伸司
宮崎清史
柳澤克重
Original Assignee
日本電産サンキョー株式会社
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 日本電産サンキョー株式会社 filed Critical 日本電産サンキョー株式会社
Publication of WO2010044221A1 publication Critical patent/WO2010044221A1/fr

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    • 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
    • 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • 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
    • 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
    • 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 for correcting shake such as camera shake by swinging a module on which a lens is mounted.
  • optical equipment such as a shooting optical device mounted on a mobile phone or a digital camera, a laser pointer, or a portable or in-vehicle projection display device
  • the vibration or external vibration is transmitted, the optical axis is shaken. It's easy to do.
  • the movable module is supported by a fixed body via an elastic body, and an actuator is configured on each side of the movable module, so that the camera shake detection sensor Based on the detection result, a technique for correcting camera shake by swinging a movable module around the X axis and the Y axis orthogonal to the actuator optical axis direction (Z axis direction) has been proposed (see Patent Document 1).
  • an object of the present invention is to provide an optical unit with a shake correction function that can prevent the shake correction of a movable module from becoming uncontrollable due to resonance.
  • 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 the shake of the movable module, and the shake detection sensor In the optical unit with a shake correction function having a shake correction magnetic drive mechanism that swings the movable module on the fixed body based on a detection result to correct the shake of the movable module.
  • a vibration damper member is added between the movable module and the fixed body.
  • a configuration is adopted in which a spring member that supports the movable module in a swingable manner is provided between the movable module and the fixed body, and the vibration damper member is added to the spring member. Can do.
  • a support protrusion that protrudes from one side of the fixed body and the movable module, and a support receiving portion that supports the tip of the support protrusion on the other side are provided.
  • a support mechanism is configured, and the spring member applies an urging force in a direction in which the support protrusion and the support receiving portion abut on the movable module. If comprised in this way, it can prevent reliably that a movable module displaces to an optical axis direction.
  • the spring member includes a plate spring including the fixed body side connecting portion, the movable module side connecting portion, and an arm portion having both ends connected to the fixed body side connecting portion and the movable body module side connecting portion. It is preferable that When the movable module swings or when the movable module shake is corrected, the spring member is deformed, but if it is a leaf spring provided with an arm, the linearity of the deformation amount (displacement amount) and spring force is high. It is easy to perform shake correction of movable modules.
  • the vibration damping damper member may be configured to be added to a connecting portion between the fixed body side connecting portion and the arm portion. In such a position, since there are no movable parts in the periphery, the vibration damper member does not interfere with the periphery when the spring member is deformed.
  • the damping damper member is added to a flat plate portion formed on the spring member. According to such a configuration, since the region to which the damping damper member is added is flat and wide, the damping damper member can be added in an effective state for preventing resonance.
  • the damping damper member may be configured to be added to a connection portion between the movable module side connecting portion and the arm portion. According to such a configuration, the movable module can be provided with the damping damper member, so that the resonance of the movable module can be effectively prevented.
  • the shake detection sensor is preferably mounted on the movable module.
  • the shake of the optical axis is directly detected by the shake detection sensor, so that the shake can be corrected with high accuracy.
  • the shake detection sensor is mounted on the movable module via a sensor damping damper member.
  • the shake detection sensor when adopting a configuration in which the shake detection sensor is mounted on the movable module, the shake detection sensor is mounted on the movable module via the damping damper member. May be adopted.
  • an image sensor is mounted on the movable module on the rear side of the lens, and in this case, the shake detection sensor detects a shake at the time of photographing. That is, when the movable module is used for imaging, it is possible to prevent shake when pressing the shutter.
  • the vibration damping damper member is added to the spring member, so that it is possible to reliably avoid that the vibration correction of the movable module becomes uncontrollable due to the resonance. it can.
  • (A) 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
  • 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 diagram showing a state in which the optical unit with shake correction function is mounted on an optical device such as a mobile phone.
  • An optical unit with shake correction function 200 (an optical unit with shake correction function) shown in FIGS. 1A and 1B is a thin camera used for a camera-equipped mobile phone, and has a substantially rectangular parallelepiped shape as a whole. Yes.
  • the optical unit 200 with a shake correction function includes a substantially rectangular plate-shaped base 220 and a box-shaped fixed cover 260 placed above the base 220.
  • the base 220 and the fixed cover 260 are A part of the fixed body 210 is configured to be fixed to each other.
  • 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 direction of the optical axis L (the direction of the Z axis), 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.
  • a notch 262d 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. From one of the side plate portions 262, the lead-out portion 350 of the flexible substrate 300 is drawn out in the Y-axis direction through a notch 262d.
  • the drawer part 350 of the flexible substrate 300 is fixed to the side plate part 262 with an adhesive or the like.
  • the movable module 1 having a built-in focus mechanism for the lens is disposed, and as described later, a shake correction mechanism that performs shake correction by swinging the movable module 1 is configured.
  • the movable module 1 has a lens driving module 1a that incorporates a focusing mechanism for the lens, and this lens driving module 1a is held inside a rectangular tube-shaped module cover 160.
  • 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.
  • 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.
  • 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.
  • 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.
  • the case 18 is made of a ferromagnetic plate such as a steel plate and also functions as a yoke.
  • 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 constitutes the interlinkage magnetic field generator 4 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 body 2 and the movable 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a 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 a 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.
  • the lens driving module 1a of the present 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.
  • 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.
  • the inner surface is magnetized to the N pole in the upper half
  • the outer surface is magnetized to the S pole
  • the inner surface is magnetized to the S pole in the lower half.
  • the pole is magnetized.
  • 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 moving 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.
  • the upper half is a large-diameter cylindrical portion 12b having a large diameter
  • 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.
  • the inner peripheral shape is circular.
  • 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.
  • 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 portion
  • 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.
  • a recess sandwiched between the rib-shaped protrusion 131b formed at the center position is a second coil winding portion 132b.
  • 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.
  • 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.
  • 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.
  • 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.
  • the lens driving coils 30s and 30t are both wound in a rectangular tube shape.
  • 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.
  • 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.
  • 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.
  • 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. .
  • 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.
  • 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.
  • 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.
  • a device 500 such as a mobile phone
  • the Z axis is generally horizontally oriented. Therefore, there is a possibility that the vertical shake around the X axis and the horizontal shake around the Y axis may occur due to the shake when the shutter is pressed. Therefore, in this embodiment, a shake correction function described below with reference to FIGS. 4 to 16 is added.
  • the movable module 1 is provided with a shake detection sensor, and the movable module 1 arranged so as to be swingable around 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.
  • FIG. 4 to FIG. 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... Resonance measures for movable module 1 .. FIG. 15 and FIG. I will explain it.
  • FIGS. 4A and 4B are explanatory views showing a cross-sectional configuration of an optical unit 200 with a shake correction function to which the present invention is applied.
  • FIGS. 4A and 4B show the optical unit 200 with a shake correction function in FIG.
  • FIG. 2 is a longitudinal sectional view when cut at a position corresponding to the line Y1-Y1 ′ in a) and a longitudinal sectional view when cut at a position corresponding to the line X1-X1 ′ in FIG.
  • FIG. 5 is an explanatory view showing a cross-sectional configuration when the optical unit 200 with shake correction function to which the present invention is applied is cut at a position different from that in FIG. 4, and FIGS.
  • FIG. 6 and 7 are respectively an exploded perspective view of the optical unit 200 with a shake correction function to which the present invention is applied as seen from the front side, and an exploded perspective view of the optical unit 200 as seen from the rear side.
  • FIG. 8 is an explanatory diagram of the movable module 1 of the optical unit 200 with a shake correction function to which the present invention is applied and members connected to the movable module 1.
  • FIGS. 8A and 8B are diagrams of the movable module 1, respectively. They are the perspective view which looked at the member connected to this movable module 1 from the front side, and the perspective view seen from the back side.
  • the base 220, the rear stopper member 270, the front stopper member 290, and the fixed cover 260 are arranged from the rear side (lower side) to the front side (upper side). Are stacked and fixed in order.
  • 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 (biasing member) shown in FIGS. 4 to 8 are arranged between the base 220 and the movable module 1.
  • the flexible substrate 300 and the spring member 280 are attached to the movable module 1. It is connected.
  • 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. Yes.
  • FIGS. 9 and 10 are an exploded perspective view 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, and an exploded perspective view as viewed from the rear side.
  • the movable module 1 includes a module cover 160 that holds the lens driving module 1a 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.
  • the top plate portion 161 has a circular opening 161a.
  • the rear end of the module cover 160 is open, and a metal sensor cover 180 is connected to the rear end of the module cover 160 so as to cover the opening.
  • the rear end portion of the module cover 160 is provided with a bent portion 169 protruding outward, and the bent portion 169 is a surface intersecting the Z axis at four corner portions.
  • a module cover side flange portion 168 is provided which projects outwardly inwardly (in the plane orthogonal to the Z axis in this embodiment).
  • the sensor cover 180 includes a bottom plate portion 181 and four side plate portions 182 that stand up frontward at the outer peripheral edge of the bottom plate portion 181, and each of the four corner portions has a Z at the front edge of the side plate portion 182.
  • a sensor cover side flange portion 188 is formed to project outward in a plane intersecting the axis (in this embodiment, in a plane orthogonal to the Z axis).
  • the sensor cover side flange portion 188 and the module cover side flange portion 168 are formed 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. Therefore, in this embodiment, a cylindrical member 199 having an inner peripheral surface formed with a female screw is fixed to the shaft portion with the shaft portion of the screw 198 passing through the small holes 188a and 168a.
  • 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 side plate portion 182 opposed in the Y-axis direction has a notch 182a formed at the front end 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.
  • the flexible substrate 300 has a shape in which a substantially rectangular sheet extending in the Y-axis direction is bent at three locations in the longitudinal direction (folded portions 301, 302, 303). 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, a second flat plate portion 320 connected to the first flat plate portion 310 via a bent portion 301, A third flat plate portion 330 connected to the second flat plate portion 320 via the bent portion 302; and a fourth flat plate portion 340 connected to the third flat plate portion 330 via the bent portion 303.
  • the 2nd flat plate part 320, the 3rd flat plate part 330, and the 4th flat plate part 340 are the shapes folded in order from the rear side to the front side in the Z-axis direction.
  • the bent portions 301 and 303 are bent at an acute angle, while the bent portion 302 is gently curved into a U shape.
  • 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 formed of the sensor cover 180 and the lens. It arrange
  • the shake detection sensor 170 is mounted on the lower surface of the third flat plate portion 330, and the lower surface of the shake detection sensor 170 is bonded and fixed to the sensor cover 180. Accordingly, the portion of the flexible substrate 300 drawn inside the movable module 1 is displaced integrally with the movable module 1, and the portion of the flexible substrate 300 drawn out from the movable module 1 is moved to the movable module 1. The near portion is deformed following the swing of the movable module 1.
  • a reinforcing metal plate 380 is fixed to the upper surface of the third flat plate portion 330 via a flexible double-sided tape 370.
  • the metal plate 380 is interposed between the 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 imaging element 15 described with reference to FIG. 2 is electrically connected to the fourth flat plate portion 340 of the flexible substrate 300 via the substrate 154 (double-sided substrate), and the lens driving coils 30s and 30t are also spring pieces.
  • the shake detection sensor 170 is a surface mount type gyroscope (angular velocity sensor) and detects angular velocity of two axes, preferably two axes orthogonal to each other.
  • 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.
  • 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.
  • a slit 300a extending in the Y-axis direction is formed at the center portion in the width direction.
  • the first flat plate portion 310 continuously extends from the hole 310 a to the bent portion 302. Therefore, the flexible substrate 300 can be easily deformed in the width direction (X-axis direction) as much as the slit 300a and the holes 310a and 320a are formed. Further, since the arrangement of the flexible substrate 300 is symmetric in the X-axis direction, the force exerted by the flexible substrate 300 on the movable module 1 is the same even when the movable module 1 swings in any direction around the Y-axis.
  • the movable module 1 can be properly swung, so that the shake correction can be reliably performed.
  • the flexible substrate 300 is provided with the bent portions 301 and 302 in the Y-axis direction at the portion drawn from the movable module 1, when the flexible substrate 300 is deformed when the movable module 1 is swung around the X-axis. The shape restoring force of this is unlikely to affect the swing of the movable module 1.
  • FIG. 11 is an explanatory diagram of members constituting the support mechanism 400 and the like in the optical unit 200 with a shake correction function to which the present invention is applied, and FIGS. 11A, 11B, 11C, and 11D are respectively shown.
  • FIG. 4 is a perspective view of the base 220, the spring member 280, and the sensor cover 180 of the optical unit 200 with shake correction function as seen from the front side, a perspective view as seen from the rear side, an exploded perspective view as seen from the front side, and an exploded perspective view as seen from the rear side. .
  • 12A and 12B are an explanatory view and a cross-sectional view, respectively, of the base 220, the spring member 280, and the sensor cover 180 of the optical unit with shake correcting function 200 to which the present invention is applied, as viewed from the X-axis direction.
  • the bottom plate portion 181 of the sensor cover 180 described with reference to FIGS. 4, 5, 9, and 10 has a central circular portion 186 that is recessed rearward when viewed from the front side.
  • the central portion of the circular portion 186 is formed with a concave portion 187 (supporting receiving portion) that protrudes in a cylindrical shape with a bottom toward the front 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 bottomed cylindrical support protrusion 227 that protrudes to the front side (upper side) 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. . Therefore, as shown in FIG.
  • 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 allows the movable module 1 to swing with respect to the fixed body 210.
  • the support mechanism 400 is disposed on the rear side of the shake detection sensor 170 at a position overlapping the shake detection sensor 170 in the Z-axis direction.
  • the base 220 is a pressed product of a metal plate, and when viewed from the front side (upper side), the bottom plate portion 221 is provided between the outer peripheral region 221a and the central region 221b where the support protrusion 227 is formed.
  • a recess 226 that is recessed rearward is formed, and the recess 226 is formed so as to surround three sides of the central region 221b where the support protrusion 227 is formed.
  • 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 plate extending in the Y-axis direction by the slit 228.
  • a spring portion 229 is formed. Accordingly, the support protrusion 227 is formed at the tip of the leaf spring portion 229. 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.
  • 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.
  • 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, and the spring member 280 is connected to the bottom lower surface 187 a of the recess 187.
  • An urging force is generated in a direction in which the small protrusion 227a of the support protrusion 227 abuts.
  • the spring member 280 is a flat spring having a flat rectangular shape, and is formed by pressing a thin metal plate such as phosphor bronze, beryllium copper, nonmagnetic SUS steel, or the like, or etching using a photolithography technique. It is.
  • fixed body side connecting portions 281 connected to the fixed body 210 are formed at four corner portions.
  • 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.
  • 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.
  • 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.
  • a sensor is provided in the central region of the movable module side connecting portion 282.
  • a circular hole 282a into which a circular portion 186 protruding rearward from the bottom plate portion 181 of the cover 180 is formed is formed.
  • 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 has a gimbal spring shape 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.
  • 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.
  • the movable module side connecting portion 282 is positioned 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.
  • 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.
  • the spring member 280 includes a movable module side connecting portion 282 made of a flat plate portion having a large area, and is connected to the sensor cover 180 over a wide area by the movable module side connecting portion 282.
  • the spring member 280 generates a biasing force in a direction in which the bottom lower surface 187a of the recess 187 and the small protrusion 227a of the support protrusion 227 come into contact with each other, and when no external force is applied to the movable module 1, the optical axis of the movable module L is held in a posture parallel to the Z axis.
  • 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.
  • 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 even when the movable module 1 swings and the spring member 280 is deformed, the bottom plate portion 181 of the sensor cover 180 The arm portion 283 does not come into contact.
  • a rectangular plate-shaped shake correction magnet 240x (which constitutes the first shake correction magnetic drive mechanism 250x ( The first shake correction magnet) is held, and on the outer surfaces of the other two side plate portions 162 facing each other in the X-axis direction, a rectangular plate-like shake correction magnet constituting the second shake correction magnetic drive mechanism 250y is provided.
  • 240y (second shake correction magnet) is held.
  • each of the shake correction magnets 240x and 240y is a rectangular flat permanent magnet.
  • the shake correction magnets 240x and 240y are constituted by two flat plate permanent magnets arranged in the Z-axis direction, and these flat plate permanent magnets are magnetized to different poles on the outer surface side and the inner surface side. ing. Moreover, the magnetization direction is reverse in the two flat permanent magnets arranged in the Z-axis direction. In addition, regarding the shake correction magnets 240x and 240y, two permanent magnets may be magnetized with different polarities.
  • a shake correction coil 230x (first shake correction) constituting the first shake correction magnetic drive mechanism 250x is provided.
  • a shake correction coil 230y (second shake) constituting the second shake correction magnetic drive mechanism 250y is provided.
  • the correction coil is fixed by adhesion.
  • the shake correction coils 230x and 230y face the shake correction magnets 240x and 240y, respectively.
  • each end of the shake correction coils 230x and 230y is electrically connected to the outside through the flexible substrate 300 or another flexible substrate.
  • a small opening 262a is formed in the side plate portion 262 of the fixed cover 260. The opening 262a fixes the shake correction coils 230x and 230y to the side plate portion 262 and then applies a reinforcing adhesive. It is used for etc.
  • the first shake correction magnetic drive mechanism 250x that swings 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.
  • the two shake correction coils 230x generate a magnetic drive force in the same direction around the X axis when the two shake correction coils 230x are energized. Wired connection. Therefore, the two first shake correction magnetic drive mechanisms 250x apply moments in the same direction around the X axis passing through the support mechanism 400 to the movable module 1 when the two shake correction coils 230x are energized.
  • the second shake correction magnetic drive mechanism 250y is configured which 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.
  • the two 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. Therefore, the two second shake correction magnetic drive mechanisms 250y apply moments in the same direction around the Y axis passing through the support mechanism 400 to the movable module 1 when the two shake correction coils 230y are energized.
  • the module cover 160 is made of a magnetic material and functions as a yoke for the shake correction magnets 240x and 240y. Further, in the module cover 160, a bent portion 169 that is bent slightly outward is formed at the rear end, and the bent portion 169 has a function of improving the magnetic flux collecting performance.
  • a shake detection sensor 170 such as a gyroscope for detecting shake during shooting is mounted on the movable module 1. Based on the detection result of the shake detection sensor 170, the control unit mounted on the camera-equipped mobile phone energizes one or both of the shake correction coil 230 x and the shake correction coil 230 y, and moves the movable module 1 to X. Oscillate in one and both around the axis and around the Y axis. If such swinging is combined, the movable module 1 is swung with respect to the entire XY plane. Therefore, it is possible to reliably correct all the shakes assumed for a camera-equipped mobile phone or the like.
  • the 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 shake detection sensor 170 becomes zero.
  • the shake correction magnetic drive mechanism 250x and the second shake correction magnetic drive mechanism 250y are closed-loop controlled.
  • the control unit controls the first shake correction magnetic drive mechanism 250x and the second shake correction magnet so that the integral value of the angular velocity detected by the shake detection sensor 170, that is, the angular displacement becomes zero.
  • the drive mechanism 250y is controlled in a closed loop.
  • the shake detection sensor 170 is mounted on the movable module 1. For this reason, since the shake of the optical axis L is directly detected by the shake detection sensor 170, the shake can be accurately corrected.
  • the movable module 1 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.
  • 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 shake correction magnetic drive mechanism 250x and the second shake correction magnetic drive mechanism 250y to swing the movable module 1 may be small.
  • the position in the Z-axis direction of the magnetic center position where the magnetic force acts on the movable module 1 is the center in the Z-axis direction of the movable module 1 If it is in a closer position, the movable module 1 can be swung greatly with a slight displacement, so that there is an advantage of excellent response of shake correction.
  • FIG. 13 is an explanatory diagram of members that limit the movable range of the movable module 1 in the optical unit 200 with a shake correction function to which the present invention is applied, and FIGS. 13 (a), (b), (c), and (d). Respectively, a perspective view from the front side, a perspective view from the rear side, an exploded perspective view from the front side, and an exploded perspective view from the rear side of the movable module 1 in which the rear stopper member 270 and the front stopper member 290 are disposed. It is.
  • FIG. 13 is an explanatory diagram of members that limit the movable range of the movable module 1 in the optical unit 200 with a shake correction function to which the present invention is applied
  • FIGS. 13 (a), (b), (c), and (d). Respectively, a perspective view from the front side, a perspective view from the rear side, an exploded perspective view from the front side, and an exploded perspective view from the rear side of the movable module 1 in which the rear stopper member
  • FIG. 14 is an explanatory diagram of a mechanism for limiting the movable range of the movable module 1 in the optical unit 200 with a shake correction function to which the present invention is applied.
  • FIGS. FIG. 1A is a plan view of the optical unit with shake correction function to which the invention is applied as viewed from the front side when the rear stopper member is disposed on the movable module, and Y2- passes through the vicinity of the corner of the optical unit 200 with shake correction function in FIG.
  • FIG. 2 is a Y2 ′ sectional view and an X2-X2 ′ sectional view passing through the vicinity of the corner of the optical unit 200 with a shake correction function in FIG.
  • a rectangular frame-shaped front stopper member 290 and a rear stopper member 270 are arranged around the movable module 1,
  • 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.
  • the rear stopper 270 when viewed from the front side, has four corners at the corners of the movable module 1 in the X-axis direction. Further, an inner wall 272a facing the protrusion 103 protruding in the Y-axis direction via a slight gap GX1 outside the X-axis direction and a slight gap GY1 outside the protrusion 103 in the Y-axis direction. And an inner wall 272b facing each other.
  • 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.
  • the rear stopper 270 includes a plate-like portion 274 that faces the protrusion 103 on the rear side in the Z-axis direction. Further, in the front stopper 290, the 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.
  • the front side stopper member 290 and the rear side stopper member 270 are made of resin, and have 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG. 15 is an explanatory diagram of a configuration for preventing the resonance of the movable module 1 in the optical unit 200 with a shake correction function to which the present invention is applied.
  • FIGS. 15A, 15B, and 15C are respectively It is the perspective view seen from the back side in the state which has arrange
  • the movable module is provided by the support mechanism 400 configured between the base 220 and the movable module 1. 1 is employed, and the movable module 1 is urged toward the base 220 by a spring member 280 disposed between the rear stopper member 270 and the movable module 1. For this reason, there is a possibility that resonance occurs in the movable module 1 when the movable module 1 swings due to the shake or when the shake correction is performed on the movable module 1.
  • a damping damper member 286 (the hatched portion in FIG. 15) is added to the spring member 280. For this reason, there is no possibility that resonance occurs in the movable module 1 when the movable module 1 swings due to the shake or when the shake correction is performed on the movable module 1. Therefore, since no overshoot or linking occurs at the resonance frequency during shake correction, the stabilization time can be shortened.
  • the shake detection sensor 170 is mounted on the movable module 1, when a disturbance that matches the natural frequency of the movable module 1 is applied to the shake detection sensor 170, the movable module is used when the shake correction is performed. 1 is caused to resonate, and the swing correction control becomes impossible, but such an abnormality can be avoided according to this embodiment.
  • a vibration absorbing member such as a vibration damping elastic sheet, a vibration damping resin material, or a vibration damping gel material in which a metal sheet or a resin sheet is attached to the spring member 280 with an adhesive material is used. Can do.
  • a vibration damper member 286 is attached to the surface.
  • Such a portion (a connecting portion between the fixed body side connecting portion 281 and the arm portion 283) is a portion that is smallly deformed even when the spring member 280 is deformed. Further, there is no movable part around the connection part between the fixed body side connecting part 281 and the arm part 283. Further, the flexible substrate 300 and the base 220 are disposed on the rear side of the spring member 280, but the connection portion between the fixed body side coupling portion 281 and the arm portion 283 is at a corner portion, and therefore the flexible substrate 300 exists. do not do. In addition, there is a sufficient gap between the spring member 280 and the base 220. For this reason, even if the spring member 280 is deformed, the vibration damper member 286 does not interfere with the surroundings.
  • FIG. 16 is an explanatory diagram of another configuration for preventing the resonance of the movable module 1 in the optical unit 200 with a shake correction function to which the present invention is applied.
  • FIGS. 16 (a), 16 (b), and 16 (c) are diagrams.
  • FIG. 4 is a perspective view seen from the rear side in which a spring member 280 and a rear stopper member 270 are arranged before and after the movable module 1, respectively, an exploded perspective view thereof, and a bottom view of the spring member.
  • the damping damper member 286 when the damping damper member 286 is added to the spring member 280, a connecting portion between the flat movable module side connecting portion 282 and the arm portion 283 on the rear surface (lower surface) of the spring member 280.
  • a vibration damper member 286 is attached to the surface.
  • the damping damper member 286 is attached to the movable module side connecting portion 282 by dividing it into a plurality of locations in the circumferential direction, but one annular damping damper member may be attached. .
  • the vibration damping damper member 286 can be attached in an optimum state to prevent resonance.
  • the flexible substrate 300 and the base 220 are disposed on the rear side of the spring member 280, but the movable module side connecting portion 282 has a sufficient gap between the flexible substrate 300 and the base 220. For this reason, even if the spring member 280 is deformed, the vibration damper member 286 does not interfere with the surroundings.
  • the damping damper member 286 is attached to the rear surface (lower surface) of the spring member 280, but the damping damper member 286 is attached to the front surface (upper surface) of the spring member 280. May be attached.
  • the connecting portion (the base portion of the arm portion 283) between the fixed body side connecting portion 281 and the arm portion 283, the movable module side connecting portion 282 and the arm portion 283, although the damping damper member 286 is attached to the connecting portion, the damping damper member 286 may be attached to the arm portion 283.
  • the first shake correction magnetic drive mechanism 250x that is paired in two places on both sides of the support protrusion 227 in the Y-axis direction is disposed.
  • a second shake correction magnetic drive mechanism 250y is arranged in two pairs on both sides of the support protrusion 227 in the X-axis direction.
  • the two first shake correction magnetic drive mechanisms 250x each generate a magnetic force that causes the movable module 1 to swing in the same direction
  • the two second shake correction magnetic drive mechanisms 250y each cause the movable module 1 to move. A magnetic force that swings in the same direction is generated.
  • the shake correction magnetic drive mechanism 250x is disposed only on one side with respect to the support protrusion 227, or a configuration in which the second shake correction magnetic drive mechanism 250y is disposed only on one side with respect to the support protrusion 227, and
  • the driving ability is stable, the shake can be corrected with high accuracy.
  • the positional relationship between the shake correction magnet 240x and the shake correction coil 230x constituting the first shake correction magnetic drive mechanism 250x is two first shake correction.
  • the other first shake correction magnetic drive mechanism 250x is used for shake correction in one of the first shake correction magnetic drive mechanisms 250x. Since the displacement of the magnet 240x and the shake correction coil 230x is corrected in the direction of correcting the positional deviation, 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. . Such an action is the same in the second shake correction magnetic drive mechanism 250y.
  • the support mechanism 400 including the bipot portion is configured between the base 220 of the fixed body 210 and the sensor cover 180 of the movable module 1, the movable module 1 is moved in the Z-axis direction. Can be prevented.
  • the gimbal spring-like leaf spring used as the spring member 280 has the long arm portion 283, the linearity of the deformation amount (displacement amount) and the spring force is high, so that it is easy to correct the shake of the movable module.
  • the damping damper member 286 is added to the spring member 280, resonance of the movable module 1 can be effectively prevented. Moreover, when the movable module 1 is swung, the vibration of the arm portion 283 can be quickly stopped, so that the vibration of the movable module 1 can also be stopped quickly.
  • the shake detection sensor 170 is mounted on the movable module 1, when a disturbance that matches the natural frequency of the movable module 1 is applied to the shake detection sensor 170, the movable module 1 is used when shake correction is performed. This makes it impossible to control the oscillation correction, but such an abnormality can be avoided according to this embodiment.
  • magnets (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. . Moreover, since the number of turns of the shake correction coils 230x and 230y can be increased on the fixed body 210 side, a large driving force can be exhibited.
  • the front stopper member 290, the rear stopper member 270, etc. are used to move the movable module 1 in the X axis direction, in the Y axis direction, in the Z axis direction, in the Z axis direction, and around the X axis.
  • Bidirectional, bi-directional movement around the Y-axis, and bi-directional movement around the Z-axis are limited. For this reason, since the movable module 1 is not displaced excessively, the plastic deformation of the spring member 280 can be prevented.
  • FIG. 17 is an explanatory diagram of a mode in which a vibration damper member is provided in a vibration detection sensor in an optical unit with a vibration correction function to which the present invention is applied.
  • the vibration damper member 286 is added between the movable module 1 and the fixed body 210.
  • a vibration damper member 176 may be added between the vibration detection sensor 170 and the sensor cover 180.
  • a flat plate-shaped damping damper member 176 is bonded to the sensor cover 180 with an adhesive 177, and the shake detection sensor 170 is bonded to the damping damper member 176 with an adhesive 178.
  • the shake detection sensor 170 is held by the sensor cover 180 via the vibration damping damper member 176 and is not in direct contact with the sensor cover 180.
  • Unnecessary vibration refers to the natural vibration of the combined body of the component parts of the movable unit module 1 or the natural vibration of the component parts alone.
  • resonance that occurs between the shake detection sensor 170 and the sensor cover 180 can also be reduced. In this way, it is possible to prevent the shake correction from becoming uncontrollable by preventing the shake detection sensor 170 from detecting unnecessary vibration.
  • damping damper member 286 is added to the spring member 280 as a configuration in which the damping damper member is mounted between the movable module 1 and the fixed body 210, and a configuration in which the damping damper member is mounted on the movable module 1.
  • the example which provided the damping damper member 176 of the shake detection sensor 170 and the sensor cover 180 was demonstrated.
  • the natural frequency of the connection portion between the sensor cover 180 and the module cover 160, the natural frequency of the sensor cover 180 alone, the natural frequency of the module cover 160 alone, or A natural frequency in fixing the shake detection sensor 170 can be considered. Therefore, depending on which natural frequency is to be attenuated, if a damping damper member is added to the optimum location in place of the damping damper members 176 and 286 or in addition to the damping damper members 176 and 286, Good.
  • both the first shake correction magnetic drive mechanism 250x and the second shake correction magnetic drive mechanism 250y are provided for the movable module 1 as the shake correction magnetic drive mechanism.
  • the present invention is applied to the case where only one of the first shake correction magnetic drive mechanism 250x and the second shake correction magnetic drive mechanism 250y is provided so as to correct only the shake in the direction in which the shake is likely to occur. Only one of the first shake correction magnetic drive mechanism 250x or the second shake correction magnetic drive mechanism 250y may be provided so that two pairs are formed on both sides of the support protrusion 227.
  • the magnets (shake correction magnets 240x and 240y) are held on the movable module 1 side which is the movable body side.
  • the structure in which the coils (shake correction coils 230x and 230y) are held on the fixed body 210 side is adopted, but the shake correction coil is held on the movable module 1 side, which is the movable body side, and the shake on the fixed body 210 side.
  • a configuration in which a correction magnet is held may be employed.
  • the spring member 280 including the plurality of arm portions 287 linearly extending in the same circumferential direction is used as the biasing member, but the plurality of arm portions 287 are in the same direction. As long as the arm portion 287 is curved, the arm portion 287 may be curved and extended.
  • the spring member 280 is used as an urging member for urging the movable module 1 toward the base 220.
  • the urging member the movable module 1 is directed toward the base 220 by a magnetic action.
  • a magnetic spring that biases the movable module 1 and a spring member that mechanically biases the movable module 1 toward the base 220 may be used.
  • the magnetic spring a configuration in which a magnetic body is disposed on the rear side with respect to the shake correction magnets 240x and 240y in the fixed body 210 is employed. If comprised in this way, the state where the movable module 1 is supported by the support mechanism 400 can be maintained reliably.
  • the movable module 1 is biased toward the base 220 only by the magnetic spring, and the spring member 280 is in a non-deformed state in which no biasing force is generated. It can be.
  • the spring member 280 is deformed and exerts an urging force.
  • the spring member 280 remains flat during the period when the movable module 1 is not swinging. For this reason, since the part in which the force applied to the spring member 280 and the amount of deformation of the spring member 280 have linearity can be used effectively, the movable module 1 can be properly swung, and shake correction can be performed. It can be done reliably.
  • the small protrusion 227a is formed at the tip of the support protrusion 227, but the entire support protrusion 227 may be formed in a hemispherical shape.
  • the support protrusion 227 is formed on the base 220 and the recess 187 is formed on the sensor cover 180.
  • the support protrusion is formed on the sensor cover 180, and the recess that receives the support protrusion is formed on the base 220. May be.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.

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Abstract

La présente invention concerne une unité optique équipée d’une fonction de correction de balancement. Le déplacement dans le sens de l’axe optique d’un module mobile peut être supprimé et on évite que la correction de balancement devienne incontrôlable à cause de la résonance. En particulier, dans une unité optique (200) équipée d’une fonction de correction de balancement, un module mobile (1) est soutenu par un mécanisme de support (400) configuré entre une base (220) et le module mobile (1), et le module mobile (1) est poussé vers la base (220) au moyen d’un élément ressort (280) disposé entre un élément butée du côté arrière (270) et le module mobile (1). En outre, sur une partie raccordement entre une section raccordement du côté du corps fixe (281) et une section bras (283) sur la surface inférieure de l’élément ressort (280), un élément amortisseur suppresseur de vibrations (286) est mis à adhérer. Ainsi, la résonance du module mobile (1) est supprimée.
PCT/JP2009/005237 2008-10-14 2009-10-08 Unité optique équipée d’une fonction de correction de balancement WO2010044221A1 (fr)

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CN104460180A (zh) * 2014-12-19 2015-03-25 深圳市世尊科技有限公司 一种开环平移实现光学防抖的音圈马达

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