WO2009133691A1 - Unité optique avec fonction de correction de vibrations - Google Patents

Unité optique avec fonction de correction de vibrations Download PDF

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Publication number
WO2009133691A1
WO2009133691A1 PCT/JP2009/001914 JP2009001914W WO2009133691A1 WO 2009133691 A1 WO2009133691 A1 WO 2009133691A1 JP 2009001914 W JP2009001914 W JP 2009001914W WO 2009133691 A1 WO2009133691 A1 WO 2009133691A1
Authority
WO
WIPO (PCT)
Prior art keywords
movable module
optical axis
shake correction
driving
correction function
Prior art date
Application number
PCT/JP2009/001914
Other languages
English (en)
Japanese (ja)
Inventor
鶴田稔史
宮崎清史
武田正
石原久寛
柳澤克重
唐沢敏行
武居勇一
長田章弘
南澤伸司
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
Priority claimed from JP2008147187A external-priority patent/JP5106254B2/ja
Priority claimed from JP2008334724A external-priority patent/JP5140573B2/ja
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
Priority to CN2009801158880A priority Critical patent/CN102016708B/zh
Publication of WO2009133691A1 publication Critical patent/WO2009133691A1/fr
Priority to US12/914,448 priority patent/US8224169B2/en

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Classifications

    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • 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
    • 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
    • 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
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/002—Details of arrangement of components in or on camera body

Definitions

  • the present invention relates to an optical unit with a shake correction function mounted on a camera-equipped mobile phone or the like.
  • An imaging optical device mounted on a portable device includes a moving body including a lens, a lens driving mechanism 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.
  • various types of camera shake correction mechanisms are mounted in order to suppress disturbances in captured images caused by user camera shakes.
  • Such camera shake correction mechanisms include those for camera shake correction provided in the shooting unit.
  • a structure in which the lens is shifted in a direction to cancel out the shake, a structure in which the image pickup element is shifted in a plane perpendicular to the optical axis, and the like have been put into practical use.
  • the structure in which the camera shake correction mechanism is incorporated in the photographing unit can be used in a photographing optical device mounted on a relatively large portable device such as a digital camera, but it can be used in a small portable device such as a camera-equipped cellular phone.
  • a photographing optical device mounted on a relatively large portable device such as a digital camera
  • a small portable device such as a camera-equipped cellular phone.
  • the mounted optical device for photographing since the photographing unit is small, it is impossible to incorporate the camera shake correction mechanism in the photographing unit.
  • a camera shake correction mechanism be configured between the imaging unit and the stationary body that supports the imaging unit in the optical apparatus for imaging.
  • the imaging unit is mounted on the stationary body. It is comprised as a movable module which can be displaced in the direction which cross
  • Such a camera shake correction mechanism described in Patent Document 1 has a structure in which an imaging unit is elastically urged by a leaf spring against a pivot portion formed on a fixed body so that the imaging unit can be displaced using the pivot portion as a fulcrum.
  • the imaging unit is swung around the X axis orthogonal to the optical axis by the first imaging unit driving mechanism provided at one position on one side shifted from the pivot portion, and on the other side shifted from the pivot portion.
  • the imaging unit is swung around the Y axis orthogonal to the optical axis by a second imaging unit drive mechanism provided at one location.
  • the first photographing unit driving mechanism disposed at one position on one side with respect to the pivot portion, or the second photographing unit driving disposed at one position on one side with respect to the pivot portion.
  • the mechanism has a problem that it is difficult to obtain a stable thrust because the driving ability fluctuates even if the positional relationship between the driving mechanism and the pivot portion is slightly shifted.
  • an object of the present invention is to improve the configuration of a shooting unit driving mechanism for shake correction with respect to a movable module having a lens such as a shooting unit to reliably correct shake such as camera shake.
  • An object is to provide an optical unit with a shake correction function.
  • an object of the present invention is to improve an arrangement of a magnet and a coil constituting a photographing unit driving mechanism for shake correction with respect to a movable module, and to provide an optical with a shake correction function capable of quickly correcting shake with less power consumption. To provide a unit.
  • an object of the present invention is to provide an optical unit with a shake correction function capable of avoiding magnetic influences on the outside and magnetic influences from the outside even when a magnetic drive mechanism is employed. .
  • the movable module in the optical unit with a shake correction function, which includes a movable module in which at least a lens is supported by a support, and a fixed body that supports the movable module, the movable module includes: It is supported on the fixed body so as to be displaceable at least in a direction intersecting the optical axis of the lens, and the movable module is placed on the optical axis on the fixed body between the movable module and the fixed body. It has a movable module driving mechanism for shake correction that generates a pair of magnetic driving forces that are displaced in a direction crossing each other at two locations facing each other with the optical axis in between. .
  • the movable module is supported so as to be displaceable with respect to the fixed body, and a movable module driving mechanism for displacing the movable module is provided between the movable module and the fixed body, so that the shake correction is performed.
  • a movable module driving mechanism for displacing the movable module is provided between the movable module and the fixed body, so that the shake correction is performed.
  • the movable module driving mechanism is disposed only on one side with respect to the optical axis in order to generate a magnetic driving force for displacing the movable module by the movable module driving mechanism disposed at two positions on both sides of the optical axis.
  • the driving ability is stable. That is, when the distance from the optical axis of the movable module drive mechanism is shifted to the one where the driving force is weakened, the other movable module drive mechanism is shifted to the one where the driving force is increased. Therefore, according to the present invention, the shake can be corrected with high accuracy.
  • the movable module drive mechanism is preferably swung based on the detection result of the shake detection sensor that detects the inclination of the movable module.
  • This shake detection sensor is preferably a sensor that is mounted on the movable module at a position opposite to the subject side with respect to the image sensor and detects an angular velocity of two orthogonal axes.
  • each of the movable module drive mechanisms includes a movable module drive magnet held on one of the movable module side and the fixed body side, and a movable module drive coil held on the other side. Can be adopted.
  • the movable module when three directions orthogonal to each other are defined as an X axis, a Y axis, and a Z axis, respectively, and a direction along the optical axis is a Z axis, the movable module is interposed between the movable module and the fixed body.
  • a driving mechanism a first movable unit that generates a magnetic driving force that is paired at two positions facing each other across the optical axis in the X-axis direction to displace the movable module in one of the X-axis direction and the Y-axis direction.
  • a magnetic drive force is generated that is paired with the module drive mechanism at two locations facing each other across the optical axis in the Y-axis direction to displace the movable module in the other of the X-axis direction and the Y-axis direction.
  • the second movable module drive mechanism is preferably configured. If comprised in this way, since a movable module can be displaced to a X-axis direction and a Y-axis direction, if they are synthesize
  • the movable module may be configured to be supported on the fixed body by a spring member connected to the movable module and the fixed body. If comprised in this way, it can be set as the structure where the movable module was supported on the fixed body so that displacement was possible by simple structure.
  • a plurality of wire suspensions extending from the fixed body along the optical axis direction can be used. If comprised in this way, since the position of a movable module can be controlled accurately, it is not necessary to monitor a lens position with a sensor.
  • the movable module is supported by the fixed body via the wire suspension extending in the optical axis direction at each of three or more places surrounding the optical axis. If comprised in this way, when a movable module is displaced, there exists an advantage that the attitude
  • the spring member is disposed as a first spring member and a second spring member on both sides of the movable module drive mechanism in the optical axis direction, and the movable module is driven by the movable module.
  • a configuration that swings around an axis that intersects the optical axis can be employed by a magnetic driving force generated by the mechanism. If comprised in this way, the center of the thrust which a movable module drive mechanism will displace the attitude
  • the center of the restoring torque can be arranged between the first spring member and the second spring member.
  • the center of the thrust that causes the movable module driving mechanism to displace the posture of the movable module, and the restoring torque that the first spring member and the second spring member that are deformed by the displacement of the movable module are returned to their original shapes. It is also possible to match the center of. As a result, since the force acting on the first spring member and the second spring member when the movable module swings becomes small, the movable module drive mechanism can swing the movable module with a small torque. Further, the spring force of the first spring member and the second spring member that support the movable module in a swingable manner may be small. Therefore, the movable module can be displaced efficiently.
  • the center of gravity of the movable module is located between the first spring member and the second spring member in the optical axis direction. If comprised in this way, when the attitude
  • the movable module can be efficiently displaced. Further, since the movable range of the movable module is reduced, for example, when a regulating member that regulates the movable range of the movable module is disposed, the gap between the movable module and the regulating member can be narrowed. As a result, the impact that occurs even when the movable module collides with the restricting member when the optical unit with shake correction function is impacted or the like is reduced, so that deformation of the movable module can be prevented. Therefore, the optical unit with a shake correction function can be a device that is resistant to impact. Furthermore, since a structure for supporting the movable module is not required outside the movable module in the Z-axis direction, the optical unit with a shake correction function can be made thin in the Z-axis direction.
  • the movable module driving mechanisms for shake correction that make a pair at two locations facing each other with the optical axis in between are respectively disposed at two locations separated in the optical axis direction, and the spring member is The movable module is arranged between the movable module driving mechanisms arranged at two positions separated in the optical axis direction, and the movable module intersects the optical axis by a magnetic driving force generated by the movable module driving mechanism.
  • the center of the thrust that causes the movable module drive mechanism to displace the posture of the movable module, and the center of the restoring torque that the spring member deformed by the displacement of the posture of the movable module tries to return to the original shape Can be placed between the two locations.
  • the center of the thrust that causes the movable module drive mechanism to displace the posture of the movable module and the center of the restoring torque that the spring member deformed by the displacement of the movable module tries to return to the original shape are matched. You can also. Therefore, the swing center of the movable module can be arranged at a position close to the spring member.
  • the movable module drive mechanism can swing the movable module with a small torque. Further, the spring force of the spring member that supports the movable module in a swingable manner may be small. Therefore, the movable module can be displaced efficiently.
  • the center of gravity of the movable module is preferably located between two locations separated in the optical axis direction.
  • the movable module can be efficiently displaced. Further, since the movable range of the movable module is reduced, for example, when a regulating member that regulates the movable range of the movable module is disposed, the gap between the movable module and the regulating member can be narrowed. As a result, the impact that occurs even when the movable module collides with the restricting member when the optical unit with shake correction function is impacted or the like is reduced, so that deformation of the movable module can be prevented. Therefore, the optical unit with a shake correction function can be a device that is resistant to impact. Furthermore, since a structure for supporting the movable module is not required outside the movable module in the Z-axis direction, the optical unit with a shake correction function can be made thin in the Z-axis direction.
  • the spring member includes an inner peripheral side connecting portion connected to the movable module, an outer peripheral side connecting portion connected to the fixed body, and an outer peripheral side extending from the inner peripheral side connecting portion.
  • the gimbal spring includes a plurality of arm portions connected to the connecting portion.
  • the gimbal spring is an inner peripheral side connecting portion connected to the movable module, an outer peripheral side connecting portion connected to the fixed body, and a plurality of links extending from the inner peripheral side connecting portion and connected to the outer peripheral side connecting portion.
  • the gimbal spring exhibits a substantially uniform biasing force in all directions, so the posture of the movable module is stable and magnetic drive for camera shake correction is provided. Control over the mechanism is very easy. With this configuration, even when a strong impact is applied to the optical unit with shake correction function and the movable module moves in a wide range, the arm portion may be deformed following the displacement of the movable module and the spring member may be damaged. Absent.
  • the movable module is displaced in the optical axis direction by switching the energization direction to the movable module drive coil provided in the movable module drive mechanism that is paired at two positions facing each other with the optical axis in between. It is preferable to execute a first mode for generating a driving force to be generated and a second mode for generating a driving force for displacing the movable module in a direction intersecting the optical axis.
  • position of a movable module can be fixed in the state displaced to the optical axis direction, and 2nd In the mode, the movable module can be swung. That is, by simultaneously using the first mode and the second mode, the movable module can be swung in a floating state.
  • the movable module drive coils provided in the movable module drive mechanism paired at two positions facing each other with the optical axis in between can be energized in independent directions
  • the electromagnetic force acting between the movable module driving coil and the movable module driving magnet on one side with the optical axis in between, and the other side with the optical axis in between Selecting the energization direction of each of the movable module driving coils so that the electromagnetic force acting between the movable module driving coil and the movable module driving magnet is in the same direction in the optical axis direction
  • the electromagnetic force acting between the movable module driving coil and the movable module driving magnet on one side with the optical axis in between
  • Each movable module drive so that the electromagnetic force acting between the movable module drive coil and the movable module drive magnet on the other side sandwiching the shaft is opposite to the optical axis direction. It is preferable to select the energizing direction of the coil for use.
  • the movable module driving coils included in the movable module driving mechanism paired at two positions facing each other with the optical axis in between are connected in series, and the optical axis is interposed between the optical axes.
  • An intermediate terminal is provided on a connection line between the movable module driving coil on one side sandwiched between and the movable module driving coil on the other side sandwiched between the optical axes.
  • the current passing through the movable module driving coil on the other side and the intermediate terminal passing through the movable module driving coil on the other side are energized in directions independent of each other. It is preferable that this is possible. If comprised in this way, the electricity supply direction with respect to each movable module drive coil can be switched easily.
  • the interval between the movable module driving coil on the one side and the intermediate terminal is different from the interval between the movable module driving coil on the other side and the intermediate terminal. It is preferable that a current of a value can be applied. If the first mode and the second mode are used at the same time, the current for the first mode and the current for the second mode flow at the same time. Therefore, different currents flow in the respective coils for driving the movable module. It will be.
  • this invention has a biasing means which presses the said movable module to the said fixed body in the said optical axis direction
  • the said movable module drive mechanism displaces the said movable module in the direction which cross
  • the optical unit with shake correction function when carried, for example, vibrations applied to the optical unit with shake correction function do not cause an abnormal noise or noise caused by collision between the movable module and the fixed body.
  • the timing of the first mode for generating the driving force for displacing the movable module in the optical axis direction and the second mode for generating the driving force for displacing the movable module in the direction intersecting the optical axis are adjusted.
  • the movable module can be immediately swung while being displaced in the optical axis direction from the state in which the movable module is fixed to the fixed body.
  • the urging means includes at least one of a mechanical spring using the spring member or another spring and a magnetic spring using the movable module driving magnet or another magnet. Can be adopted.
  • the movable module can be configured as an imaging unit in which an imaging element is held on the support.
  • the lens is included in a movable body supported on the support body so as to be movable in the optical axis direction.
  • the movable body is driven on the support body in the optical axis direction.
  • a lens driving mechanism is supported. With this configuration, even when the movable module has a lens driving mechanism, the shake of a mobile phone equipped with an optical unit with a shake correction function can be corrected by the displacement of the movable module. There is no need to incorporate a correction mechanism. Therefore, even when the movable module cannot be provided with a shake correction mechanism because the movable module is small, shake correction can be performed.
  • the lens driving mechanism may magnetically drive the movable body in the optical axis direction.
  • the movable module driving magnet is held on the movable module side, and the movable module driving coil is held on the fixed body side. If comprised in this way, since the number of wiring with respect to a movable module may be small, a wiring structure can be simplified. Further, since the number of turns of the movable module driving coil can be increased, a large driving force can be exhibited. Furthermore, since the movable module driving magnet having a smaller mass among the movable module driving coil and the movable module driving magnet is provided on the movable module on the movable body side, the weight of the movable module can be reduced. . Therefore, since the movable module can be displaced with a small force, the power consumption required for shake correction can be reduced. There is also an advantage of excellent response to vibration.
  • the movable module is an imaging unit in which an imaging device is held on the support, and the lens is included in a movable body supported on the support so as to be movable in the optical axis direction.
  • a lens drive mechanism that magnetically drives the movable body in the optical axis direction is supported on the support, and the movable module drive that makes a pair at two positions facing each other with the optical axis in between.
  • Each mechanism has the movable module driving magnet held on the movable module side, the movable module driving coil held on the fixed body side, and the movable module includes a cover portion surrounding the movable body on the outer peripheral side.
  • the lens driving mechanism includes a lens driving coil held on the outer peripheral surface of the movable body and a lens driving magnet held on the inner peripheral surface of the cover portion. And a preparative, the movable module drive magnets are preferably held on the outer circumferential surface of the cover portion.
  • the movable module driving coil is wound in a cylindrical shape that opens toward the movable module, and a part of the movable module driving magnet is located inside the movable module driving coil. Preferably it is. If comprised in this way, since the magnetic field linked with the movable module drive coil can be efficiently generated by the movable module drive magnet, the thrust on the movable module can be improved.
  • the fixed body includes a fixed body side yoke outside the movable module driving coil, and the fixed body side yoke includes an opening in a portion facing the movable module driving magnet. . If comprised in this way, since the magnetic field linked with the movable module drive coil can be efficiently generated by the movable module drive magnet, the thrust on the movable module can be improved.
  • a buffer member that interferes with the movable module side when the movable module is displaced in a direction intersecting the optical axis is preferably attached to the fixed body. If comprised in this way, when an impact is added to the optical unit with a shake correction function and the movable module is displaced in the direction crossing the optical axis, the impact when the movable module side hits the fixed body side can be absorbed.
  • the movable module preferably includes a movable module side yoke that covers the movable module driving magnet and the movable module driving coil on both sides in the optical axis direction. If comprised in this way, since a leakage magnetic flux can be reduced, the thrust with respect to a movable module can be improved.
  • the fixed body has a fixed cover that covers the movable module and the movable module drive mechanism on the outer peripheral side, and at least the movable module when viewed from a direction orthogonal to the optical axis in the fixed cover. It is preferable that at least a portion located in the magnetic flux region of the movable module driving magnet outside the driving magnet is made of a magnetic material. If comprised in this way, the leakage magnetic flux from the movable module drive mechanism to the outer side of a fixed cover can be decreased.
  • the magnetic material acts as a magnetic collecting yoke
  • the interlinkage magnetic flux interlinking with the movable module driving coil is increased, so that a large thrust can be obtained when the movable module driving mechanism displaces the posture of the movable module. Accordingly, the response to vibration is excellent.
  • the fixed cover preferably includes a first cover portion made of a nonmagnetic material and a second cover portion made of the magnetic material. Even if comprised in this way, the leakage magnetic flux from the movable module drive mechanism to the outer side of a fixed cover can be decreased. Further, since the magnetic material acts as a magnetic collecting yoke, the interlinkage magnetic flux interlinking with the movable module driving coil is increased, so that a large thrust can be obtained when the movable module driving mechanism displaces the posture of the movable module. Accordingly, the response to vibration is excellent. Furthermore, it is possible to reduce the influence of an external magnetic flux entering the shake correction magnetic drive mechanism and affecting the posture of the movable module. Furthermore, it is possible to easily realize a configuration in which the magnetic body does not exist at a location where the magnetic attractive force with the movable module driving coil becomes a load when the movable module is displaced.
  • the fixed body has a fixed cover that covers the outer periphery of the movable module and the movable module drive mechanism with a magnetic part, and the movable module is adjacent to the periphery of the optical axis in the drive magnet.
  • the drive magnets have different magnetic poles at positions adjacent to each other around the optical axis. If comprised in this way, since a magnetic flux will generate
  • the movable module includes a movable module side yoke holding the movable module driving magnet, and the movable module side yoke extends to a position facing the outer surface of the movable module driving magnet. It is preferable that a coil-side magnetic flux collecting yoke portion is provided. If comprised in this way, since a movable module drive mechanism is pinched
  • the movable module is supported so as to be displaceable with respect to the fixed body, and a movable module driving mechanism for displacing the movable module is provided between the movable module and the fixed body, so that the shake correction is performed.
  • a movable module driving mechanism for displacing the movable module is provided between the movable module and the fixed body, so that the shake correction is performed.
  • the movable module driving mechanism disposed at two positions on both sides sandwiching the optical axis generates a magnetic driving force that displaces the movable module in the same direction.
  • the drive capability is stable. That is, when the distance from the optical axis of the movable module drive mechanism is shifted to the one where the driving force is weakened, the other movable module drive mechanism is shifted to the one where the driving force is increased. Therefore, according to the present invention, the shake can be corrected with high accuracy.
  • FIGS. 7A and 7B are an external view and an exploded perspective view, respectively, of the photographing optical apparatus according to the first embodiment to which the present invention is applied as viewed obliquely from above on the subject side. It is a longitudinal cross-sectional view when the optical device for photography which concerns on Embodiment 1 is cut
  • (A), (b) is the external view which looked at the imaging
  • (A), (b) is an explanatory view showing the configuration of a coil holding member used in another optical imaging apparatus to which the present invention is applied, and another optical imaging apparatus to which the present invention is applied as an optical axis. It is a longitudinal cross-sectional view when cut
  • (A), (b) is the external appearance perspective view which looked at the to-be-photographed object's optical device which concerns on Embodiment 2 to which this invention was applied from diagonally upward, and an exploded perspective view, respectively. It is a longitudinal cross-sectional view when the optical device for photography which concerns on Embodiment 2 is cut
  • FIG. 10 is an explanatory diagram schematically showing an operation of energization control means energizing an imaging unit drive coil in Embodiment 2, wherein (a) is a case where a thrust force for moving the imaging unit in the Z-axis direction is applied to the imaging unit. (B) schematically shows a current flow when a moment for swinging the photographing unit is applied to the photographing unit.
  • FIG. 6 is a longitudinal sectional view of the photographing optical device according to the third embodiment when cut in parallel to the optical axis.
  • (A) is a top view of the leaf
  • (b) is the perspective view.
  • FIG. 6 is an explanatory diagram schematically showing an operation of energization control means for energizing an imaging unit driving coil in Embodiment 3, wherein (a) is a case where a thrust for moving the imaging unit in the Z-axis direction is applied to the imaging unit. (B) schematically shows a current flow when a moment for swinging the photographing unit is applied to the photographing unit.
  • (A) is the perspective view which looked at the imaging
  • (b) is the side view, (c) is a flexible printed circuit board. It is a fragmentary perspective view which shows a peripheral part.
  • FIG. 16 is a perspective view seen from obliquely above on the subject side in a state where a fixed cover, a part of a photographing unit driving coil, a first spring, a frame, and the like are removed from the photographing optical device shown in FIG. 15.
  • FIG. 6 is a perspective view of a photographing optical device in which a part of the fixed cover is made of a magnetic material and the other part is made of a nonmagnetic material. It is a longitudinal cross-sectional view which shows typically the example which added the change to the shape of the yoke of an imaging
  • the photographing optical device corresponds to an optical unit with a shake correction function.
  • three directions orthogonal to each other are defined as an X axis, a Y axis, and a Z axis, respectively, and a direction along the optical axis L (lens optical axis) is defined as a Z axis.
  • 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.
  • FIGS. 1A and 1B are an external view and an exploded perspective view, respectively, of the photographing optical device according to Embodiment 1 of the present invention viewed obliquely from above on the subject side.
  • FIG. 2 is a longitudinal sectional view of the photographing optical device according to the first embodiment of the present invention cut in parallel to the optical axis.
  • An imaging optical device (an optical unit with a shake correction function) 200 shown in FIGS. 1A, 1B, and 2 is a thin camera used for a camera-equipped mobile phone, and has a substantially rectangular parallelepiped shape as a whole. ing.
  • the imaging optical device 200 includes a rectangular plate-shaped base 220 and a box-shaped fixed cover 230 that covers the base 220.
  • the fixed body 210 is formed by the base 220 and the fixed cover 230. Is configured.
  • a rectangular window 230 a for light transmission is formed on the upper plate portion of the fixed cover 230.
  • a photographing unit 1 (movable module) and a shake correction mechanism for displacing the photographing unit 1 by displacing the photographing unit 1 are configured inside the fixed cover 230.
  • FIG. 4 is an explanatory diagram schematically showing the operation of the photographing unit 1 shown in FIG.
  • the left half of FIG. 4 shows a view when the moving body 3 is at a position at infinity (normal shooting position), and the right half of FIG. 4 shows the moving body 3 at the macro position (close-up shooting position). The figure when it exists in is shown.
  • the photographing unit 1 includes, for example, three lenses 121 along the direction of the optical axis L and the A direction (front side) approaching the subject (object side). , And a direction opposite to the subject (image sensor side / image side) in the B direction (rear side), and has a substantially rectangular parallelepiped shape.
  • the photographing unit 1 generally includes a moving body 3 that holds three lenses 121 and a fixed aperture inside, a lens driving mechanism 5 that moves the moving body 3 along the optical axis direction, a lens driving mechanism 5 and a movement. And a support body 2 on which a 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 coil holder 13 that holds lens driving coils 30s and 30t, which will be described later, on the outer peripheral side surface.
  • the support 2 includes a rectangular plate-shaped image sensor holder 19 that positions the image sensor 155 on the opposite side to the subject side, a box-shaped case 18 that covers the image sensor holder 19 on the subject side, and an inner side of the case 18.
  • a hole 19 a that guides incident light to the image sensor 155 is formed in the center of the image sensor holder 19.
  • the support 2 includes a plate 151 on which the image sensor 155 is mounted, and the plate 151 is fixed to the lower surface of the image sensor holder 19.
  • the case 18 is made of a ferromagnetic plate such as a steel plate and also functions as a yoke.
  • the case 18 constitutes a linkage magnetic field generator 4 that generates a linkage magnetic field in the lens drive coils 30 s and 30 t held by the coil holder 13 together with a lens drive magnet 17 described later.
  • the interlinkage magnetic field generator 4 constitutes the lens driving mechanism 5 together with the lens driving coils 30 s and 30 t wound around the outer peripheral surface of the 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 coupling portion 14 a on the imaging element holder 19, and the inner circumferential side coupling portion 14 b is the imaging element side end surface of the coil holder 13 of the moving body 3. It is connected to.
  • 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 surface of the 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 subject-side end surface of the coil holder 13, and the position of the magnetic piece 61 is a position from the subject side 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 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-shaped or spherical magnetic body may be used as the magnetic piece 61.
  • the magnetic piece 61 is formed in a ring shape, there is an effect that the magnetic attractive force attracted to the lens driving magnet 17 when the lens holder 12 moves in the optical axis direction is isotropic.
  • the magnetic piece 61 is disposed on the subject-side end surface of the lens holder 12.
  • the magnetic piece 61 When the magnetic piece 61 is not energized (origin position), the magnetic piece 61 is attracted to the lens driving magnet 17 to bring the lens holder 12 to the imaging element side. Can stand still.
  • the magnetic piece 61 held on the end surface on the subject side of the lens holder 12 moves to a position farther away from the lens driving magnet 17, thereby extraneously pressing the lens holder 12 against the imaging element side. Power does not work. Therefore, the lens holder 12 can be moved in the optical axis direction with a small amount of electric power.
  • the lens 121 when viewed from the direction of the optical axis L, the lens 121 is circular, but the case 18 used for the support 2 is rectangular box-shaped. Accordingly, the case 18 includes a rectangular tube-shaped body portion 184, and an upper plate portion 185 in which an incident window 180 is formed on the upper surface side of the rectangular tube-shaped body portion 184.
  • the rectangular tube body 184 has a rectangular tube shape, and includes four side plate portions 181 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 181.
  • Each of the lens driving magnets 17 is made of a rectangular flat permanent magnet.
  • Each of the four lens driving magnets 17 is 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 coil holder 13 in which coils (lens driving coils 30s and 30t) are wound around the outer peripheral side surface.
  • the coil holder 13 constitutes 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 coil holder 13 includes a circular lens holder housing hole 130 for holding the lens holder 12 inside.
  • the inner peripheral shape when the coil holder 13 is viewed from the direction of the optical axis L, the inner peripheral shape is circular, but the outer peripheral side surface 131 that defines the outer peripheral shape of the coil holder 13 is a quadrangle, which corresponds to four sides of the quadrangle. Each surface is provided with four surfaces 132.
  • rib-like 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 are formed at the image sensor side end.
  • the concave portion sandwiched between the rib-shaped protrusion 131a and the rib-shaped protrusion 131b formed at the center position is a first coil winding section 132a, and the rib-shaped protrusion 131c formed at the subject side end and the center position A recess sandwiched between the rib-shaped protrusions 131b formed on the second coil winding portion 132b.
  • each of the four surfaces 132 has a rectangular shape formed by removing the first coil winding portion 132 a and the second coil winding portion 132 b so as to avoid a square corner portion.
  • Through holes are formed, and the through holes 133a, 133b penetrate the side wall of the coil holder 13 in the inner and outer directions.
  • the through holes 133 a and 133 b of the coil holder 13 constitute a hollow portion that is recessed inward on the outer peripheral side surface 131 of the moving body 3.
  • the through holes 133a and 133b have a circumferential length dimension (a square side dimension) of each surface 132 at a central portion sandwiched between adjacent corner portions on the outer peripheral side surface 131 of the coil holder 13.
  • the size is about 1/3.
  • a thick column portion 134 extending in the direction of the optical axis L is formed in the corner portion of the coil holder 13 with the same thickness.
  • the through holes 133a and 133b are formed over the entire width direction (direction of the optical axis L) of the first coil winding portion 132a and the second coil winding portion 132b, but the rib-like protrusions 131a, 131b, and 131c are formed. It is not formed to take. Therefore, the through holes 133a and 133b (thinned portions) are formed only in the middle part in the direction of the optical axis L of the coil holder 13 (moving body 3), and are formed at positions avoiding both ends.
  • 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. Yes.
  • the lens driving coils 30s and 30t are both wound in a rectangular tube shape.
  • Each of the four lens driving magnets 17 is divided into two in the optical axis direction, and in each case, the inner surface and the outer surface are magnetized to different poles, so that the two lens driving coils 30s and 30t The winding direction is opposite.
  • the through holes 133a and 133b have the same length in the direction of the optical axis L as the length of the first coil winding portion 132a and the second coil winding portion 132b in the direction of the optical axis L.
  • the first coil winding portion 132a and the second coil winding portion 132b are formed over the whole, but the lens driving coils 30s and 30t are formed of the first coil winding portion 132a and the second coil. It is wound over the entire winding part 132b and passes through the entire formation region of the through holes 133a, 133b. For this reason, the through holes 133a and 133b are closed at the outside by the lens driving coils 30s and 30t.
  • the through hole 133b located on the subject side in the direction of the optical axis L among the through holes 133a and 133b is opened on the inside.
  • the portion to be closed is closed by a large-diameter cylindrical portion 12b formed in the upper half portion of the lens holder 12, while the through hole 133a located on the image sensor side in the optical axis direction is formed in the lower half portion of the lens holder 12.
  • the formed small diameter cylindrical portions 12a are opposed to each other.
  • the coil holder 13 configured in this way 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 tube-shaped body portion 184 of the case 18.
  • the weight of the moving body 3 is reduced and the thrust of the moving body 3 is increased.
  • the through holes 133a and 133b are formed on the surface 132 that avoids the corners of the outer peripheral side surface 131 of the coil holder 13, the wall portions extending in the direction of the optical axis L are formed at the corners of the coil holder 13.
  • the portion is formed as a post portion 134. For this reason, even when the weight of the moving body 3 is reduced by forming the through holes 133a and 133b, the moving body 3 has sufficient strength.
  • the through holes 133a and 133b are formed in the corners of the coil holder 13, when the lens driving coils 30s and 30t are wound, the shape of the lens driving coils 30s and 30t is broken at the corners, and the lens driving coils are formed.
  • 30s and 30t cannot be wound in a square shape, in this embodiment, since the through holes 133a and 133b are formed in the surface 132 that avoids the corners, the lens driving coil 30s and the through holes 133a and 133b pass through the through holes 133a and 133b. Even when 30t is wound, the lens driving coils 30s and 30t can be wound in a square shape.
  • the through holes 133a and 133b are formed in the central portion of the polygonal side, the thick pillar portions 134 extending in the direction of the optical axis L are equivalent to the plurality of corner portions of the polygon. Therefore, the weight balance and strength balance in the circumferential direction of the movable body can be suitably ensured. Moreover, since the through holes 133a and 133b are formed in the middle of the coil holder 13 in the direction of the optical axis L, avoiding both ends, the strength of both ends of the coil holder 13 can be prevented from decreasing.
  • the moving body 3 is normally located on the image sensor side (image sensor side), and when a current in a predetermined direction is passed through the lens driving coils 30s and 30t in such a state.
  • the lens driving coils 30 s and 30 t 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 movement amount of the moving body 3 and the lens driving lens are used.
  • Linearity between the currents flowing through the coils 30s and 30t can be improved.
  • the two spring members 14s and 14t are used, a large balance force is applied in the direction of the optical axis L when the moving body 3 stops, and centrifugal force and impact are applied in the direction of the optical axis L. Even if another force such as a force is applied, the moving body 3 can be stopped more stably.
  • the moving body 3 in order to stop the moving body 3, the moving body 3 is not stopped by colliding with a collision material (buffer material) or the like, but is stopped using a balance between electromagnetic force and elastic force. Therefore, it is possible to prevent the occurrence of a collision sound.
  • a collision material buffer material
  • the case 18 has a box shape having an upper plate portion 185 on the upper surface of the rectangular tube-shaped body portion 184, and therefore is configured between the lens driving magnet 17 and the lens driving coils 30s and 30t.
  • the leakage magnetic flux from the magnetic path can be reduced. Therefore, it is possible to improve the thrust between the amount of movement of the coil holder 13 and the current flowing through the lens driving coils 30s and 30t. Further, when the photographing unit 1 is assembled to a mobile phone, the magnetic flux leakage to the surrounding electronic components can be reduced.
  • the lens 121 is circular, but the lens driving coils 30 s and 30 t are square regardless of the lens shape, and the lens driving magnet 17 has a rectangular inner peripheral surface in the support 2. It is a flat permanent magnet fixed to each of a plurality of inner surfaces corresponding to the sides of the rectangular tube-shaped body 184 of the case 18 formed in the above. 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 outer peripheral side surface (the outer peripheral side surface 131 of the coil holder 13) of the moving body 3 is the same square as the lens driving coils 30s and 30t.
  • the lens driving coils 30s and 30t can be wound into a quadrangle simply by winding the lens driving coils 30s and 30t around the outer peripheral surface (the outer peripheral side surface 131 of the coil holder 13).
  • the lens holder 12 is housed and mounted in the lens holder housing hole 130 after winding the lens driving coils 30s and 30t around the coil holder 13.
  • the configuration can be adopted, and when the lens driving coils 30s and 30t are wound, a situation such as damage to the lens 121 can be avoided.
  • the moving body 3 of the photographing unit 1 holds a magnetic piece 61 that generates a magnetic attractive force between the lens driving magnet 17 and the lens driving magnet 17 at a position closer to the subject in the optical axis direction than the lens driving magnet 17.
  • the position of the moving body 3 in the optical axis direction can be controlled with high accuracy. Therefore, the photographing unit 1 does not need to perform control for monitoring and feeding back the position of the lens 121 in the optical axis direction with a sensor or the like.
  • the position of the lens 121 in the optical axis direction is monitored and fed back by a sensor or the like. You may do it.
  • drum 184 and the lens drive coils 30s and 30t were square
  • a substantially square may be sufficient. That is, the rectangular cylindrical body 184 and the lens driving coils 30s and 30t may have a shape in which square corners are rounded, and further, the square corners are linearly shaved to form, for example, an octagon. However, a configuration in which a portion cut at a corner portion is short and has a shape similar to a quadrangle may be used.
  • the rectangular tubular body 184 and the lens driving coils 30s and 30t are rectangular, but the shape of the rectangular tubular body and the coil is not limited to a square as long as it is a polygon.
  • the lens driving magnet 17 may be a hexagonal shape, an octagonal shape, or the like.
  • the lens driving magnet 17 is fixed to all surfaces of the rectangular cylindrical body portion of the yoke, and every other position in the circumferential direction. You may employ
  • the outer shape of the coil holder 13 is also polygonal.
  • the coil holder 13 is cylindrical, and a lens wound in a polygon using protrusions formed on the outer peripheral side surface thereof.
  • a structure in which the driving coils 30 s and 30 t are fixed to the outer peripheral side surface of the coil holder 13 may be adopted.
  • the moving body 3 is divided into the lens holder 12 and the coil holder 13, and the body made of the concave portion or the hole formed by removing a part of the side wall portion of the moving body 3 with respect to the body of the lens holder 12.
  • the through holes 133a and 133b constituting the punched portion are formed, but a recess or a hole is formed by removing a part of the body portion of the lens holder 12, and the recess or the hole is used as a thinned portion. May be.
  • the moving body 3 is divided into the lens holder 12 and the coil holder 13.
  • the moving body may be configured as one component. If the concave portion or the hole formed by removing a part thereof is formed as the thinned portion, the weight of the moving body 3 can be reduced. Also in this case, it is preferable to adopt a configuration such as avoiding the corners when the through holes 133a and 133b are formed in the lens holder 12 in the above-described form.
  • the upper surface of the base 220 is formed with a cylinder at each of the four corner portions.
  • the four protrusions 226 hold the lower ends of a total of four suspension wires 190 (spring members).
  • the four suspension wires 190 extend in parallel to the optical axis L from positions sandwiched between the X axis and the Y axis among a plurality of places surrounding the optical axis L.
  • the suspension wire 190 is made of a nonmagnetic metal such as beryllium copper or a nonmagnetic SUS steel material.
  • a square cylindrical body 164 of the yoke 16 (shooting unit side yoke) is fixed to the outer peripheral surface of the support 2.
  • a rectangular frame-shaped flange portion 166 extending toward the outer peripheral side is formed at the subject side end of the body portion 164, and a total of four suspension wires 190 are formed at four corner portions of the flange portion 166.
  • a hole 169 that holds the upper end is formed. Therefore, the photographing unit 1 is supported by the fixed body 210 while being floated from the base 220 by the four suspension wires 190 and can be displaced in a direction intersecting the optical axis L.
  • a lower end portion of the body portion 164 on the image sensor 155 side of the yoke 16 is bent slightly inward, and a rectangular frame-shaped magnetic plate 168 constituting a part of the yoke 16 is formed on the lower surface of the bent portion 167. It is fixed.
  • the magnetic plate 168 protrudes greatly outside the body portion 164 of the yoke 16.
  • the photographing unit 1, the fixed body 210, and the photographing unit driving mechanism (movable module driving mechanism) for shake correction that generates a magnetic driving force that displaces the photographing unit 1 in a direction intersecting the optical axis L.
  • the first imaging unit driving mechanism (first movable module driving mechanism) 250x for displacing the imaging unit 1 in the X-axis direction and the second imaging unit driving mechanism (the first imaging unit 1) for displacing the imaging unit 1 in the Y-axis direction 2 movable module driving mechanism) 250y and the configuration of the first photographing unit driving mechanism 250x and the second photographing unit driving mechanism 250y will be described below.
  • the cover portion 150 surrounding the movable body 3 on the outer peripheral side is formed by the rectangular tube-shaped body portion 184 of the case 18 and the body portion 164 of the yoke 16, and the four inner peripheries of the cover portion 150 are formed.
  • a lens driving magnet 17 is held on each of the side surfaces (the inner peripheral side surface of the rectangular tubular body 184 of the case 18).
  • the first photographing unit drive mechanism 250x is formed on each of the two outer peripheral side surfaces facing each other in the X-axis direction among the four outer peripheral side surfaces (the outer peripheral side surface of the body 164 of the yoke 16).
  • a rectangular plate-shaped imaging unit driving magnet (movable module driving magnet) 240x is held, and each of the other two outer peripheral surfaces facing each other in the Y-axis direction is a rectangle constituting the second imaging unit driving mechanism 250y.
  • a plate-shaped imaging unit driving magnet 240y is held.
  • a magnet having the same configuration can be used for the imaging unit driving magnet 240x and the imaging unit driving magnet 240y, and in this embodiment, both are made of rectangular flat permanent magnets.
  • the inner surface and the outer surface are magnetized to different poles.
  • the outer surface side is magnetized to the N pole and the inner surface side is magnetized to the S pole.
  • the magnetizing direction of the imaging unit driving magnet 240x and the imaging unit driving magnet 240y is not limited to the above pattern, and in this embodiment, the inner surface side of one of the opposing magnets is N-poles (the outer surface side is S-poles).
  • the inner surface of the other magnet may be S poles (the inner surfaces are N poles).
  • the two coil holding members 260 are formed on the four inner peripheral side surfaces of the rectangular tubular body 235 of the fixed cover 230 in a state where the projecting portion 262 on the lower end side is fitted in the notch 223 formed on the side portion of the base 220. It is fixed.
  • the coil holding member 260 is made of a nonmagnetic material.
  • the inner surfaces of the two coil holding members 260 facing each other in the X-axis direction are wound in a rectangular tube shape so that the opening is directed to the imaging unit driving magnet 240x.
  • the photographing unit driving coil (movable module driving coil) 230x is held, and the photographing unit driving coil 230x faces the photographing unit driving magnet 240x in the inner and outer directions. Further, the outer end portion of the imaging unit driving magnet 240x is in an inside of the imaging unit driving coil 230x, and the imaging unit driving magnet 240x is in each side of the imaging unit driving coil 230x. A magnetic field interlinking from the inside to the outside of the imaging unit driving coil 230x is formed.
  • the photographing unit 1 is paired at two positions facing each other with the optical axis L in the X-axis direction by the photographing unit driving coil 230x and the photographing unit driving magnet 240x.
  • a first photographing unit drive mechanism 250x that is displaced in the direction is configured.
  • the two imaging unit driving coils 230x are wired to connect the imaging unit 1 to generate a magnetic driving force in the same X-axis direction when energized, and drive the two first imaging unit drives.
  • the mechanism 250x has a push-pull configuration. For example, when one of the two first imaging unit driving mechanisms 250x applies the thrust indicated by the arrow A1 in FIG. 2 to the imaging unit 1, the other applies the thrust indicated by the arrow A2 in FIG.
  • the two first photographing unit drive mechanisms 250x simultaneously apply a magnetic driving force to the photographing unit 1 in the same direction in the X-axis direction.
  • the magnetization directions of the two imaging unit driving magnets 240x are different, and the two first imaging units are driven.
  • the drive mechanism 250x may have a push-pull configuration.
  • an imaging unit driving coil 230y wound in a rectangular tube shape so that the opening faces the imaging unit driving magnet 240y.
  • the photographing unit driving coil 230y is held in the inner and outer directions with respect to the photographing unit driving magnet 240y.
  • the outer end of the imaging unit driving magnet 240y is in the inside of the imaging unit driving coil 230y, and the imaging unit driving magnet 240y is in relation to each side of the imaging unit driving coil 230y.
  • a magnetic field linking from the inner side to the outer side of the imaging unit driving coil 230y is formed.
  • the photographing unit 1 is paired at two positions facing each other with the optical axis L in between in the Y-axis direction by the photographing unit driving coil 230y and the photographing unit driving magnet 240y.
  • a second imaging unit drive mechanism 250y that is displaced in the direction is configured.
  • the two imaging unit driving coils 230y are connected to each other so as to generate a magnetic driving force in the same Y-axis direction when energized, and drive the two second imaging unit.
  • the mechanism 250y has a push-pull configuration. For this reason, the two second imaging unit driving mechanisms 250y simultaneously apply a magnetic driving force to the imaging unit 1 in the same direction in the Y-axis direction.
  • the magnetization directions of the two imaging unit driving magnets 240y may be different, and the two second imaging unit driving mechanisms 250y.
  • the drive mechanism 250y may have a push-pull configuration.
  • a flat-plate-shaped buffer member 268 made of an elastic body such as rubber is fixed to the inner surface of the coil holding member 260 inside the imaging unit driving coils 230x and 230y. Is opposed to the imaging unit driving magnets 240x and 240y in a direction inside and outside through a predetermined gap.
  • the buffer member 268 has a function of absorbing the impact when the photographing unit driving magnets 240x and 240y hit when the photographing unit 1 is displaced in a direction crossing the Z-axis direction due to an impact applied to the photographing optical device 200. ing.
  • the yoke 16 (the photographing unit side yoke) provided in the photographing unit 1 is driven by the photographing unit by the flange portion 166 and the magnetic plate 168.
  • the magnets 240x and 240y and the photographing unit driving coils 230x and 230y are covered on both sides in the optical axis L direction.
  • a camera-equipped mobile phone equipped with the photographing optical device 200 configured in this manner is equipped with a shake detection sensor (not shown) such as a gyro sensor for detecting shake during shooting. Based on the detection result of the sensor, the control unit mounted on the camera-equipped mobile phone energizes one or both of the photographing unit driving coil 230x and the photographing unit driving coil 230y, and the photographing unit 1 is placed in the X axis. Displacement in one or both of the direction and the Y-axis direction. If such displacement is combined, the photographing unit 1 is displaced 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. When performing such shake correction, since the bending of the four suspension wires 190 surrounding the optical axis L is used, the photographing unit 1 is arranged so that the optical axis L moves in parallel without the optical axis L tilting. It is displaced to.
  • a shake detection sensor such as a
  • the shake detection sensor can adopt a configuration mounted on the photographing optical device 200 itself, and can also employ a configuration mounted on a device body outside the photographing optical device 200 in a camera-equipped mobile phone. Can do.
  • the photographing optical device 200 has a structure in which the photographing unit 1 is supported so as to be displaceable with respect to the fixed body 210 via a plurality of suspension wires 190.
  • An imaging unit driving mechanism (a first imaging unit driving mechanism 250x and a second imaging unit driving mechanism 250y) that displaces the imaging unit 1 is provided between the fixed body. For this reason, even when a shake such as a hand shake occurs when shooting with a camera-equipped mobile phone equipped with the optical device 200 for shooting, the shake can be corrected by the displacement of the shooting unit 1. Accordingly, since it is not necessary to incorporate a shake correction mechanism in the photographing unit 1, even when the shake correction mechanism cannot be provided in the photographing unit 1 because the photographing unit 1 is small, shake correction can be performed.
  • the first imaging unit drive mechanism 250x that is paired in two places on both sides sandwiching the optical axis L in the X-axis direction is disposed, and the optical axis L is sandwiched in the Y-axis direction.
  • a second imaging unit driving mechanism 250y is disposed in two pairs on both sides.
  • the two first photographing unit driving mechanisms 250x each generate a magnetic driving force that displaces the photographing unit 1 in the same direction, and the two second photographing unit driving mechanisms 250y each displace the photographing unit 1 in the same direction.
  • the magnetic driving force to be generated is generated.
  • the drive Since the ability is stable, shake can be corrected with high accuracy.
  • the other first imaging unit when the distance from the optical axis L of one first imaging unit drive mechanism 250x out of the two first imaging unit drive mechanisms 250x deviates in the direction in which the magnetic driving force decreases, the other first imaging unit. Since the distance from the optical axis L of the drive mechanism 250x is shifted in the direction in which the magnetic drive force increases, the drive capability of the first imaging unit drive mechanism 250x is stable. Similarly, when the distance from the optical axis L of one second imaging unit drive mechanism 250y out of the two second imaging unit drive mechanisms 250y deviates in the direction in which the magnetic driving force becomes smaller, the other second imaging unit drive mechanism 250y. Since the distance from the optical axis L of the unit driving mechanism 250y is shifted in the direction in which the magnetic driving force increases, the driving capability of the second imaging unit driving mechanism 250y is stable.
  • the positional relationship between the imaging unit driving magnet 240x and the imaging unit driving coil 230x constituting the first imaging unit driving mechanism 250x is one of the two first imaging unit driving mechanisms 250x, and the magnetic driving force is reduced.
  • the second imaging unit drive mechanism 250x is displaced, the direction in which the positional deviation between the imaging unit driving magnet 240x and the imaging unit driving coil 230x in the second imaging unit driving mechanism 250x is corrected, that is, Since the magnetic driving force is shifted in the increasing direction, the first imaging unit driving mechanism 250x has a stable driving capability.
  • the positional relationship between the imaging unit driving magnet 240y and the imaging unit driving coil 230y constituting the second imaging unit driving mechanism 250y is smaller than that of the two second imaging unit driving mechanisms 250y, and the magnetic driving force is reduced.
  • the other second imaging unit driving mechanism 250y corrects the positional deviation between the imaging unit driving magnet 240y and the imaging unit driving coil 230y in one imaging unit driving mechanism 250y, that is, Since the magnetic driving force is shifted in the increasing direction, the driving capability of the second photographing unit driving mechanism 250y is stable.
  • the photographing unit 1 is supported on the fixed body 210 by four suspension wires 190 extending from the base 220 of the fixed body 210 toward the subject side along the direction in which the optical axis L extends. Therefore, the photographing unit 1 can be configured to be displaceably supported on the fixed body 210 with a simple configuration, and the position of the photographing unit 1 can be accurately controlled. Therefore, it is necessary to monitor the lens position with a sensor. Absent. Further, in this embodiment, since the bending of the suspension wires 190 arranged at three or more places surrounding the optical axis L, or in this embodiment, four places are used, the photographing unit 1 is displaced when the photographing unit 1 is displaced. Therefore, the optical axis L is displaced so that it moves in parallel without tilting.
  • the magnets (shooting unit driving magnets 240x and 240y) are held on the photographing unit 1 side which is the movable body side, and the fixed body. Since the coils (photographing unit driving coils 230x and 230y) are held on the 210 side, the number of wirings to the photographing unit 1 on the movable body side may be small, and the wiring structure can be simplified. Further, since the number of turns of the photographing unit driving coils 230x and 230y can be increased on the fixed body 210 side, a large driving force can be exhibited.
  • the imaging unit driving magnets 240x and 240y having a smaller mass are provided on the imaging unit 1 on the movable body side.
  • the photographing unit 1 can be reduced in weight. Therefore, since the photographing unit 1 can be displaced with a small force, the power consumption required for shake correction can be reduced. Further, according to the present embodiment, there is an advantage that the response to vibration is excellent.
  • the yoke 16 (photographing unit side yoke) provided in the photographing unit 1 is connected to the photographing unit driving magnets 240x and 240y and the photographing unit driving coils 230x and 230y with the optical axis L by the flange portion 166 and the magnetic plate 168. Since both sides of the direction are covered, a large thrust can be obtained when the photographing unit 1 is displaced by the first photographing unit driving mechanism 250x and the second photographing unit driving mechanism 250y because the leakage magnetic flux is small. Therefore, according to this embodiment, there is an advantage of excellent response to vibration.
  • a cover 150 is provided that surrounds the support 2 and moving body 3 of the photographing unit 1 on the outer peripheral side, and the lens driving magnet 17 is held on the inner peripheral surface of the cover 150, and the outer peripheral surface of the cover 150 Since the photographing unit driving magnets 240x and 240y are held in the middle, the lens driving mechanism 5 and the photographing unit driving mechanism (the first photographing unit driving mechanism 250x and the second photographing unit driving mechanism 250y) are arranged. Magnetic interference can be prevented.
  • FIGS. 5A and 5B are explanatory views showing the configuration of the coil holding member used in another photographing optical apparatus to which the present invention is applied, and another photographing optical apparatus to which the present invention is applied. It is a longitudinal cross-sectional view when cut
  • the coil holding member 260 is made of a plate material in which no opening is formed. However, in this embodiment, as shown in FIGS.
  • an opening 265 made of a through hole is formed in a portion of the coil holding member 260 that is formed inside the imaging unit driving coils 230x and 230y, and is formed as a fixed body side yoke by a magnetic material. The opening 265 faces the imaging unit driving magnets 240x and 240y on the outside.
  • the coil holding member 260 functions as a back yoke (fixed body side yoke) of the coils 230x and 230y.
  • the degree to which the magnetic field generated by the imaging unit driving magnets 240x and 240y intersects with the imaging unit driving coils 230x and 230y can be increased, so the first imaging unit driving mechanism 250x and the second imaging unit driving mechanism 250y.
  • the driving efficiency can be increased.
  • the buffer member 268 shown in FIGS. 1 and 2 is omitted, but the example shown in FIGS. 5A and 5B is also used.
  • the buffer member 268 shown in FIGS. 1 and 2 may be provided.
  • FIG. 7 is a longitudinal sectional view of the photographing optical device according to the second embodiment of the present invention cut along the XZ plane.
  • the photographic optical device according to the second embodiment includes parts common to the photographic optical device 200 according to the first embodiment, common parts are denoted by the same reference numerals and description thereof is provided. Is omitted.
  • the photographic optical device 200 ⁇ / b> A includes a rectangular plate-shaped base 220 and a box-shaped fixed cover 230 that covers the base 220.
  • the base 220 and the fixed cover 230 constitute a fixed body 210.
  • the fixed cover 230 is rectangular when viewed from the optical axis L direction, and includes a rectangular upper plate portion 234 and a rectangular tube-shaped body portion 235 extending downward from the outer peripheral edge of the upper plate portion 234.
  • the upper plate portion 234 is formed with a circular window 230a for light transmission.
  • the photographing unit 1 and a shake correction mechanism for displacing the photographing unit 1 to perform shake correction are configured inside the fixed cover 230.
  • the photographing unit 1 includes a yoke 16 that covers the outer peripheral side thereof.
  • the yoke 16 is rectangular when viewed from the Z-axis direction, and includes a rectangular top plate portion 161 on the subject side and four side plate portions 162 extending rearward from the outer peripheral edge of the top plate portion 161.
  • a circular opening 161 a is formed in the top plate portion 161.
  • a rear end portion of the yoke 16 is opened, and an opening edge is formed with a flange portion bent outward.
  • a metallic sensor cover 186 is connected to the rear side of the yoke 16 using a flange portion so as to cover the opening.
  • a shake detection sensor 182 that detects the tilt of the photographing unit 1 is disposed.
  • a surface mount type gyro sensor angular velocity sensor
  • Such a gyro sensor is a sensor that detects an angular velocity of two axes, preferably two axes that are orthogonal to each other.
  • the gyro sensor is configured to detect an angular velocity of two axes including an X axis and a Y axis. .
  • the control unit (not shown) detects the integral value of the angular velocity detected by the shake detection sensor 182, that is, the angular displacement.
  • the first and second photographing unit drive mechanisms 250x and 250y are closed-loop controlled so that becomes zero.
  • a gap opening in the X-axis direction is formed between the sensor cover 186 and the yoke 16, and the flexible printed circuit board 183 is drawn out therefrom.
  • the flexible printed circuit board 183 has a shape in which a substantially rectangular sheet extending in the X-axis direction is folded in the Z-axis direction at three locations in the longitudinal direction.
  • the shake correction mechanism includes a magnetic driving force that swings the photographing unit 1 about the X axis and the Y axis on the fixed body 210, and a magnetic driving force that moves the photographing unit 1 on the fixed body 210 in the Z axis direction. It is generated in pairs at two locations facing each other with the optical axis L in between.
  • a photographing unit driving mechanism for shake correction a first photographing unit driving mechanism 250x that swings the photographing unit 1 around the X axis and moves in the Z axis direction, and a photographing unit 1 that swings around the Y axis.
  • a second photographing unit drive mechanism 250y is configured to be moved and moved in the Z-axis direction.
  • the first and second photographing unit drive mechanisms 250x and 250y are configured on the outer peripheral side of the yoke 16.
  • FIG. 8A is a plan view of the first leaf spring supporting the photographing unit 1
  • FIG. 8B is a perspective view thereof.
  • the photographing unit 1 is disposed on both sides of the photographing unit 1 drive mechanism in the Z-axis direction, and is connected to the photographing unit 1 and the fixed body 210. Member) and a second leaf spring 192 (second spring member).
  • the first and second leaf springs 191 and 192 have the same shape and have a flat rectangular shape.
  • the first and second leaf springs 191 and 192 are metallic gimbal springs such as phosphor bronze, beryllium copper, non-magnetic SUS steel, etc., and press working on a thin plate having a predetermined thickness or etching using photolithography technology. It is formed by.
  • first and second leaf springs 191 and 192 In the central portions of the first and second leaf springs 191 and 192, substantially rectangular inner peripheral side connecting portions 191a and 192a attached to the photographing unit 1 side are formed. Rectangular holes 191b and 192b are formed in the central region of the inner peripheral side connecting portions 191a and 192a.
  • the first leaf spring 191 is fixed to the yoke 16 by a method such as an adhesive so that the opening 161a is positioned inside the rectangular hole 191b.
  • the second leaf spring 192 is fixed to the sensor cover 186 by an adhesive or the like in a state where the circular portion 187 protruding rearward at the bottom plate portion of the sensor cover 186 is inserted into the rectangular hole 192b.
  • a rectangular frame-shaped outer peripheral side connecting portion 191c, 192c is formed on the outer peripheral side of the first and second leaf springs 191, 192.
  • the first leaf spring 191 has an outer peripheral side connecting portion 191 c fixed to the upper surface of a rectangular frame 193, and is attached to the inner peripheral surface of the fixed cover 230 via the frame 193.
  • the second leaf spring 192 has an outer peripheral side connecting portion 192 c fixed to the lower surface of a rectangular 194 frame, and is attached to the inner peripheral surface of the fixed cover 230 via the frame 194.
  • each arm portion 191d, 192d extends from the corner portion of the inner peripheral side connection portion 191a, 192a in the X axis direction and the Y axis direction, and is located at an outer circumferential position at an angular position 180 degrees around the optical axis L.
  • each arm part 191d, 192d is formed with a narrow width, and the thickness dimension and the width dimension are formed substantially the same.
  • the first and second leaf springs 191 and 192 can be deformed around the X axis, around the Y axis, in the X axis direction, the Y axis direction, and the Z axis direction. It is supported so as to be displaceable in the Y axis direction, the X axis direction, the Y axis direction, and the Z axis direction.
  • the center of gravity G of the photographing unit 1 is located between the first leaf spring 191 and the second leaf spring 192.
  • the first leaf spring 191 and the second leaf spring 192 are attached in a state that exerts a biasing force that biases the photographing unit 1 toward the base 220, and the shake correction mechanism is not operating. In the state, the photographing unit 1 is pressed against the base 220.
  • the imaging unit driving magnet 240x constituting the first imaging unit driving mechanism 250x is held on the outer surface of the two side plate parts 162 of the yoke 16 that face each other in the Y-axis direction in the imaging unit 1.
  • the imaging unit driving magnet 240y constituting the second imaging unit driving mechanism 250y is held on the outer surfaces of the other two side plate portions 162 facing each other in the X-axis direction.
  • the imaging unit driving magnets 240x and 240y are composed of two flat permanent magnets arranged in the Z-axis direction. In these flat permanent magnets, the outer surface side and the inner surface side are magnetized to different poles. Yes. Moreover, the magnetization direction is reversed in the two flat permanent magnets arranged in the Z-axis direction.
  • the pair of imaging unit driving magnets 240x facing each other with the optical axis L in between are arranged such that the magnetization direction is the same in the Z-axis direction when viewed from the optical axis L side.
  • the pair of imaging unit driving magnets 240y opposed to each other with the optical axis L interposed therebetween are arranged such that the magnetization direction is the same in the Z-axis direction when viewed from the optical axis L side. .
  • an imaging unit driving coil 230x constituting the first imaging unit driving mechanism 250x is held on the inner peripheral surface portion of the body 235 of the fixed cover 230 facing each other in the Y-axis direction, and the X-axis direction
  • a photographing unit driving coil 230y constituting the second photographing unit driving mechanism 250y is held on the inner peripheral surface portion of the body 235 of the fixed cover 230 facing each other.
  • the photographing unit driving coils 230x and 230y are opposed to the photographing unit driving magnets 240x and 240y, respectively, and the two effective sides positioned in the Z-axis direction in the photographing unit driving coils 230x and 230y are respectively photographing units.
  • the driving magnets 240x and 240y face each of the two flat permanent magnets arranged in the Z-axis direction.
  • the two imaging unit driving coils 230x are wound in the same direction as viewed from the optical axis L, and are connected in series.
  • An intermediate terminal 253 is provided on the connection line connecting the imaging unit driving coil 230x disposed on one side of the optical axis L and the imaging unit driving coil 230x disposed on the other side. (See FIG. 9).
  • each imaging unit driving coil 230y is wound in the same direction when viewed from the optical axis L, and is connected in series.
  • An intermediate terminal 253 is also provided on the connection line connecting the imaging unit driving coil 230y disposed on one side of the optical axis L and the imaging unit driving coil 230y disposed on the other side. ing.
  • the first imaging unit drive mechanism 250x and the second shake correction magnetic drive mechanism 250y control energization to the imaging unit drive coils 230x and 230y, respectively, based on the detection result of the shake detection sensor 182.
  • Energization control means (not shown) is provided.
  • FIG. 9 is an explanatory view schematically showing an operation (first mode and second mode) in which the energization control means energizes the pair of imaging unit driving coils 230x.
  • FIG. 9 (a) shows the operation in the first mode.
  • FIG. 9B schematically shows the flow of current when a thrust force for displacing the photographing unit 1 in the Z-axis direction is applied to the photographing unit 1, and
  • FIG. 9B crosses the photographing unit 1 with the optical axis L in the second mode.
  • the flow of current when a moment for swinging in the direction to be applied is applied to the photographing unit 1 is schematically shown.
  • FIG. 9 shows a state where only the pair of photographing unit driving coils 230x are taken out and viewed from a position away from the photographing unit 1 on one side of the optical axis L. For this reason, the two imaging unit drive coils 230x are wound in the same direction when viewed from the optical axis L, but are shown in FIG. 9 as being wound in opposite directions.
  • the energization control unit causes a current flowing from the imaging unit driving coil 230 x disposed on one side of the optical axis L to the intermediate terminal 253. Then, a current is passed from the intermediate terminal 253 through the imaging unit driving coil 230x disposed on the other side of the optical axis L. Then, since an electromagnetic force is generated between the movable module driving coil 230x and the movable module driving magnet 240x, the two first imaging unit driving mechanisms 250x are connected to the imaging unit 1 as indicated by an arrow F1. A thrust that is displaced in the direction of the optical axis L is applied. The same applies to the imaging unit driving coil 230y. Accordingly, the photographing unit 1 that has been pressed toward the base 220 by the urging force of the first and second leaf springs 191 and 192 moves in the Z-axis direction and becomes swingable.
  • the imaging unit driving coil 230y Therefore, if the swings around the X axis and the Y axis are combined, the photographing unit 1 can be swung with respect to the entire XY plane. Therefore, if the first mode is energized and the second mode is energized simultaneously, that is, if the second mode is superimposed on the first mode, the first and second leaf springs 191 and 192 are The photographing unit 1 that has been pressed toward the base 220 by the urging force moves in the Z-axis direction so as to be able to swing, and can swing the photographing unit 1 with respect to the entire XY plane. All shakes expected for camera-equipped mobile phones can be reliably corrected. If the energization in the first mode and the energization in the second mode are superimposed, currents having different current values flow through the two imaging unit driving coils 230x.
  • the first photographing unit driving mechanism 250x and the second photographing unit driving mechanism 250y are deformed by the displacement of the posture of the photographing unit 1 and the center of thrust that causes the posture of the photographing unit 1 to be displaced.
  • the plate spring 191 and the second plate spring 192 are configured such that the center of the restoring torque at which the plate spring 191 and the second plate spring 192 return to the original shape, the center of gravity G of the photographing unit 1 and the swing center of the photographing unit 1 coincide.
  • the movable module driving one side with the optical axis L in between is different. Electromagnetic force acting between the coil 230x and the movable module driving magnet 240x, and electromagnetic force acting between the movable module driving coil 230x on the other side sandwiching the optical axis L and the movable module driving magnet 240x. If the magnetizing direction of the imaging unit driving magnet 240x and the energizing direction of each movable module driving coil 230x are selected so that the same is the same in the optical axis L direction, the first mode can be executed. .
  • the photographing unit 1 is provided with the first leaf spring 191 and the second leaf spring 192 that are disposed on both sides of the first and second photographing unit drive mechanisms 250x and 250y in the Z-axis direction.
  • the center of the thrust that causes the first photographing unit driving mechanism 250x and the second photographing unit driving mechanism 250y to displace the posture of the photographing unit 1, and the first leaf spring 191 and the first leaf spring 191 that are deformed by the displacement of the photographing unit 1 are used.
  • the center of the restoring torque at which the two leaf springs 192 try to return to the original shape can be disposed between the first and second leaf springs 191 and 192.
  • these positions can be matched between the first and second leaf springs 191 and 192. Therefore, the swing center of the photographing unit 1 can be disposed between the first and second leaf springs 191 and 192.
  • the force acting on the first and second leaf springs 191 and 192 is reduced when the photographing unit 1 is swung, so that the first and second photographing unit drive mechanisms 250x and 250y can perform the photographing unit 1 with a small torque. Can be swung.
  • the spring force of the first and second leaf springs 191 and 192 supporting the photographing unit 1 so as to be swingable may be small. Therefore, the photographing unit 1 can be displaced efficiently.
  • the center of gravity G of the photographing unit 1 is located at an intermediate position between the first leaf spring 191 and the second leaf spring 192. Therefore, when the posture of the photographing optical device 200A is changed, It can be reduced or avoided that the photographing unit 1 is inclined with respect to the photographing optical device 200A. As a result, it is not necessary to secure a range in which the photographing unit 1 tilts depending on the posture of the photographing optical device 200A as a movable range of the photographing unit 1, and thus the photographing optical device 200A can be downsized.
  • the photographing optical device 200A can be a device resistant to impact. Furthermore, since a structure for supporting the photographing unit 1 is not required outside the photographing unit 1 in the Z-axis direction, the photographing optical device 200A can be made thin in the Z-axis direction.
  • the first and second leaf springs 191 and 192 are deformable around the X axis, around the Y axis, in the X axis direction, the Y axis direction, and the Z axis direction. Deformation follows the displacement around the axis, X-axis direction, Y-axis direction, and Z-axis direction. Accordingly, the center of thrust by the first and second photographing unit drive mechanisms 250x and 250y, the center of restoring torque by the first plate spring 191 and the second leaf spring 192, and the center of the photographing unit 1 are the first plate spring 191. 2 and the second leaf spring 192, there is a possibility that the photographing unit 1 will move over a wide range when a strong impact is applied to the photographing optical device 200A. However, the arm portions 191d and 192d of the photographing unit 1 Since the deformation follows the displacement, the first and second leaf springs 191 and 192 are not damaged.
  • the imaging unit is controlled by controlling the energization to the imaging unit driving coils 230x and 230y of the first and second imaging unit drive mechanisms 250x and 250y by the first and second energization control means. 1 can be swung around the X axis and the Y axis, and the photographing unit 1 can be moved in the Z axis direction. Further, when the first and second photographing unit drive mechanisms 250x and 250y are not operating, the photographing unit 1 is pressed against the base 220 by the first and second leaf springs 191 and 192, and the shake correction mechanism operates.
  • the first and second photographing unit driving mechanisms 250x and 250y generate a magnetic driving force that separates the photographing unit 1 from the base 220 against the biasing force of the first and second leaf springs 191 and 192.
  • the photographing unit 1 is fixed to the base 220 and moves while the first and second photographing unit drive mechanisms 250x and 250y are not operating, such as when carrying the photographing optical device 200A. Absent. Therefore, when the photographic optical device 200A is carried, for example, vibrations applied to the photographic optical device 200A do not generate noise and noise that rattle between the photographing unit 1 and the fixed body 210.
  • the first and second leaf springs 191 and 192 exert the urging force that presses the photographing unit 1 against the base 220 when the first and second photographing unit drive mechanisms 250x and 250y are not operating.
  • this urging force may be exerted using a mechanical spring such as a leaf spring different from the first and second leaf springs 191 and 192.
  • a magnetic spring is configured by disposing a magnetic body that exerts a magnetic attractive force between the stationary unit 210 and the imaging unit driving magnet, and the imaging unit 1 is pressed against the base 220 against the magnetic spring. The biasing force may be exerted.
  • FIGS. 10A and 10B are an external view and an exploded perspective view, respectively, of the photographing optical device according to Embodiment 3 to which the present invention is applied as viewed obliquely from above on the subject side.
  • FIG. 11 is a longitudinal sectional view of the photographic optical device according to the third embodiment to which the present invention is applied, taken along the XZ plane. Since the photographing optical device according to the third embodiment includes portions common to the photographing optical device photographing according to the first embodiment, common portions are denoted by the same reference numerals and description thereof is provided. Is omitted.
  • FIG. 10 have a substantially rectangular parallelepiped shape as a whole.
  • a rectangular plate-shaped base 220 and a box-shaped fixed cover 230 that covers the base 220 are provided, and the base 220 and the fixed cover 230 constitute a fixed body 210.
  • the fixed cover 230 has a rectangular shape when viewed from the optical axis L direction, and includes a rectangular upper plate portion 234 and a rectangular tube-shaped body portion 235.
  • a circular window 230a for light transmission is formed in the rectangular upper plate portion 234.
  • the photographing unit 1 and a shake correction mechanism for displacing the photographing unit 1 to perform shake correction are configured inside the fixed cover 230.
  • a shake detection sensor 182 for detecting the tilt of the photographing unit 1 is disposed on the rear side of the photographing unit 1, and the shake detection sensor 182 is covered by a box-shaped sensor cover 186 attached from the rear side of the photographing unit 1. It has been broken.
  • the photographing unit 1 includes a front yoke 16a and a rear yoke 16b that cover the outer peripheral side from the front side and the rear side on the subject side.
  • the front yoke 16a has a rectangular shape when viewed from the Z-axis direction, and includes a rectangular top plate portion 161 and a side plate portion 162 extending rearward from the outer peripheral edge of the top plate portion 161.
  • a circular opening 161 a is formed in the top plate 161.
  • the rear end portion of the front yoke 16a is open, and the opening edge is bent outward.
  • the rear yoke 16 b includes a bottom plate portion 163 that covers the sensor cover 186 and a side plate portion 165 that extends forward from the outer peripheral edge of the bottom plate portion 163.
  • the front end of the rear yoke 16b is open, and the opening edge is bent outward.
  • the bent portion of the rear end portion of the front yoke 16a and the bent portion of the front end portion of the rear yoke 16b are in contact with each other and connected.
  • a gap 165a that opens in the X-axis direction is formed in the rear yoke 16b, from which a flexible printed circuit board 183 is drawn.
  • the flexible printed circuit board 183 has a shape in which a substantially rectangular sheet extending in the X-axis direction is folded in the Z-axis direction at three locations in the longitudinal direction.
  • the shake correction mechanism generates a magnetic driving force that swings the photographing unit 1 about the X axis and the Y axis on the fixed body 210 and a magnetic driving force that moves the photographing unit 1 on the fixed body 210 in the Z-axis direction. It is generated in pairs at two locations facing each other with the optical axis L in between.
  • the first photographing unit driving mechanism 250x that swings the photographing unit 1 around the X axis and moves in the Z axis direction, and the photographing unit 1 around the Y axis.
  • a second imaging unit drive mechanism 250y is configured to swing and move in the Z-axis direction.
  • the first photographing unit drive mechanism 250x includes a front photographing unit drive mechanism 251x configured on the outer peripheral side of the front yoke 16a and a rear photographing unit drive mechanism 252x configured on the outer peripheral side of the rear yoke 16b.
  • the front photographing unit drive mechanism 251x and the rear photographing unit drive mechanism 252x are arranged at two positions that are separated in the optical axis L direction.
  • the second photographing unit driving mechanism 250y is also configured on the outer peripheral side of the front photographing unit driving mechanism 251y configured on the outer peripheral side of the front yoke 16a and the rear yoke 16b.
  • the rear photographing unit driving mechanism 252y is configured, and the front photographing unit driving mechanism 251y and the rear photographing unit driving mechanism 252y are arranged at two positions separated in the optical axis L direction.
  • the front photographing unit drive mechanisms 251x and 251y are at the same position in the Z-axis direction, and the rear photographing unit drive mechanisms 252x and 252y are at the same position in the Z-axis direction.
  • FIG. 12A is a plan view of a leaf spring 195 supporting the photographing unit 1
  • FIG. 12B is a perspective view thereof.
  • the photographing unit 1 is supported by a single plate spring 195 that connects the photographing unit 1 and the fixed body 210.
  • the leaf spring 195 is disposed between the front photographing unit drive mechanisms 251x and 251y and the rear photographing unit drive mechanisms 252x and 252y in the Z-axis direction.
  • the leaf spring 195 has a planar rectangular shape. It is a metallic gimbal spring such as phosphor bronze, beryllium copper, non-magnetic SUS steel, and the like, and is formed by pressing a thin plate having a predetermined thickness or etching using a photolithography technique.
  • a frame-shaped inner peripheral side connecting portion 195a attached to the photographing unit 1 side is formed.
  • a rectangular hole 195b is formed in the central region of the inner peripheral side connecting portion 195a.
  • the front yoke 16a is inserted inside the rectangular hole 195b, and the inner peripheral connecting portion 195a is bent and fixed to the bent portion by a method such as an adhesive.
  • a rectangular frame-shaped outer peripheral side connecting portion 195 c is formed on the outer peripheral side of the leaf spring 195.
  • the leaf spring 195 has an outer peripheral side connecting portion 195 c fixed to a rectangular frame-shaped frame 196, and is attached to the inner peripheral surface of the fixed cover 230 via the frame 196.
  • each arm portion 195d extends in the X-axis direction or the Y-axis direction from the corner portion of the inner peripheral side connecting portion 195a and is at the angle of the outer peripheral side connecting portion 195c at an angular position about 90 degrees apart about the optical axis L. Connected to the department.
  • Each arm portion 195d is formed so as to be thin in the Z-axis direction and to have a predetermined width in the X-axis direction and the Y-direction. Accordingly, the leaf spring 195 can be deformed around the X axis, the Y axis, and the Z axis, and the photographing unit 1 is supported to be displaceable around the X axis, the Y axis, and the Z axis. Has been. Further, since the leaf spring 195 is difficult to deform in the X-axis direction and the Y-axis direction, the photographing unit 1 moves in the Z-axis direction but moves in the X-axis direction and the Y-axis direction. Hard to do.
  • the center of gravity of the photographing unit 1 is located between the front photographing unit driving mechanisms 251x and 251y and the rear photographing unit driving mechanisms 252x and 252y.
  • the leaf spring 195 is attached so as to urge the photographing unit 1 toward the base 220, and presses the photographing unit 1 against the base 220 when the shake correction mechanism is not operating.
  • the imaging unit driving magnet 240x constituting the first imaging unit driving mechanism 250x is composed of a magnet 241x of the front imaging unit driving mechanism 251x and a magnet 242x of the rear imaging unit driving mechanism 252x.
  • the magnets 241x and 242x are respectively held on the outer surfaces of the two side plate portions 162 and 165 of the front yoke 16a and the rear yoke 16b facing each other in the Y-axis direction.
  • the magnets 241x and 242x are composed of two flat permanent magnets arranged in the Z-axis direction. In these flat permanent magnets, the outer surface side and the inner surface side are magnetized to different poles.
  • the magnets 241x and 242x have the same arrangement in the magnetization direction when viewed from the optical axis direction.
  • the pair of magnets 241x and 242x facing each other with the optical axis L in between are arranged so that the magnetization direction is the same in the Z-axis direction.
  • the imaging unit driving magnet 240y constituting the second imaging unit driving mechanism 250y is composed of a magnet 241y of the front imaging unit driving mechanism 251y and a magnet 242y of the rear imaging unit driving mechanism 252y.
  • the magnets 241y and 242y are respectively held on the outer surfaces of the two side plate portions 162 and 165 of the front yoke 16a and the rear yoke 16b facing each other in the X-axis direction.
  • the magnets 241y and 242y are composed of two flat permanent magnets arranged in the Z-axis direction. In these flat permanent magnets, the outer surface side and the inner surface side are magnetized to different poles. In the two flat permanent magnets arranged in the Z-axis direction, the magnetization directions are reversed.
  • the magnets 241y and 242y have the same arrangement in the magnetization direction when viewed from the optical axis direction.
  • the pair of magnets 241y and 242y facing each other with the optical axis L in between are arranged such that the magnetization direction is the same in the Z-axis direction.
  • the imaging unit driving coil 230x that constitutes the first imaging unit driving mechanism 250x includes a coil 231x of the front imaging unit driving mechanism 251x and a coil 232x of the rear imaging unit driving mechanism 252x.
  • the coils 231x and 232x are constituted by two rectangular flat coils arranged side by side in the Z-axis direction, and are respectively held on the inner peripheral surface portion of the body 235 of the fixed cover 230 facing each other in the Y-axis direction. ing.
  • Two effective sides positioned in the Z-axis direction in the coils 231x and 232x are respectively opposed to two flat permanent magnets arranged in the Z-axis direction in the magnets 241x and 242x.
  • the coils 231x and 232x When viewed from the optical axis L, the coils 231x and 232x are wound in the same direction, and the coils 231x and 232x disposed on one side of the optical axis L are disposed on the other side. 232x connected in series. More specifically, the coil 232x and the coil 231x arranged on one side of the optical axis L are connected in this order from the coil 232x and the coil 231x arranged on the other side of the optical axis L. . Further, an intermediate terminal 254 is provided on a connection line between one coil 231x of the optical axis L and the other coil 232x connected to the coil 231x (see FIG. 13).
  • the imaging unit driving coil 230y constituting the second imaging unit driving mechanism 250y includes a coil 231y of the front imaging unit driving mechanism 251y and a coil 232y of the rear imaging unit driving mechanism 252y.
  • the coil 231y and the coil 232y are configured by two rectangular flat coils arranged side by side in the Z-axis direction, and are respectively held on the inner peripheral surface portion of the body 235 of the fixed cover 230 facing each other in the Y-axis direction. Has been.
  • the two effective sides positioned in the Z-axis direction are respectively opposed to the two flat permanent magnets arranged in the Z-axis direction in the magnets 241y and 242y.
  • the coil 231y and the coil 232y are wound in the same direction when viewed from the optical axis L, and are disposed on the other side from the coil 231y and the coil 232y disposed on one side of the optical axis L.
  • the coil 231y and the coil 232y are connected in series so as to be continuous. More specifically, the coil 232y and the coil 231y arranged on one side of the optical axis L are connected in this order from the coil 232y and the coil 231y arranged on the other side of the optical axis L. .
  • An intermediate terminal 254 is also provided on a connection line between one coil 231y of the optical axis L and the other coil 232y connected to the coil 231y.
  • the first imaging unit drive mechanism 250x and the second shake correction magnetic drive mechanism 250y control energization to the imaging unit drive coils 230x and 230y, respectively, based on the detection result of the shake detection sensor 182.
  • First and second energization control means are provided.
  • the first energization control unit controls energization to the coils 231x and 232x
  • the second energization control unit controls energization to the coils 231y and 232y.
  • FIG. 13 is an explanatory view schematically showing an operation (first mode and second mode) in which the energization control means energizes the pair of imaging unit driving coils 230x.
  • FIG. 13 (a) shows the operation in the first mode.
  • FIG. 13B schematically shows a current flow when a thrust force that displaces the photographing unit 1 in the Z-axis direction is applied to the photographing unit 1, and
  • FIG. 13B crosses the photographing unit 1 with the optical axis L in the second mode.
  • the flow of current when a moment for swinging in the direction to be applied is applied to the photographing unit 1 is schematically shown.
  • FIG. 13 shows a state in which only the pair of photographing unit driving coils 230x are taken out and viewed from a position away from the photographing unit 1 on one side of the optical axis L. For this reason, the two imaging unit driving coils 230x are wound in the same direction when viewed from the optical axis L, but are shown in FIG. 13 as being wound in opposite directions.
  • the energization control means in the first mode, the energization control means generates a current from the imaging unit driving coils 231x and 232x arranged on one side of the optical axis L to the intermediate terminal 254.
  • a current passing through the photographing unit driving coils 231x and 232x disposed on the other side of the optical axis L is passed from the intermediate terminal 254.
  • an electromagnetic force is generated between the imaging unit driving coils 231x and 232x and the movable module driving magnets 241x and 242x. Therefore, as indicated by an arrow F1, the two first imaging unit driving mechanisms 250x are configured by the imaging unit.
  • a thrust that is displaced in the direction of the optical axis L is applied to 1.
  • the imaging unit driving coil 230y Accordingly, the photographing unit 1 that has been pressed toward the base 220 by the urging force of the leaf spring 195 moves in the Z-axis direction and becomes swingable.
  • the imaging unit driving coil 230y Therefore, if the swinging around the X axis and the Y axis is combined, the photographing unit 1 is swung with respect to the entire XY plane. Therefore, it is possible to correct all shakes assumed for a camera-equipped mobile phone or the like.
  • the center of the thrust by which the first photographing unit driving mechanism 250x and the second photographing unit driving mechanism 250y displace the posture of the photographing unit 1 and the leaf spring 195 deformed by the displacement of the photographing unit 1 are the original.
  • the center of the restoring torque to be restored to the shape, the center of gravity of the photographing unit 1, and the swing center of the photographing unit 1 are coincident.
  • the movable module driving one side with the optical axis L in between is different. Electromagnetic force acting between the coil 230x and the movable module driving magnet 240x, and electromagnetic force acting between the movable module driving coil 230x on the other side sandwiching the optical axis L and the movable module driving magnet 240x. If the magnetizing direction of the imaging unit driving magnet 240x and the energizing direction of each movable module driving coil 230x are selected so that the same is the same in the optical axis L direction, the first mode can be executed. .
  • the photographing unit 1 is provided by the leaf spring 195 disposed between the front photographing unit driving mechanisms 251x and 251y and the rear photographing unit driving mechanisms 252x and 252y that are arranged side by side in the Z-axis direction. It is supported. For this reason, the center of the thrust by which the first photographing unit driving mechanism 250x and the second photographing unit driving mechanism 250y displace the posture of the photographing unit 1 and the leaf spring 195 deformed by the displacement of the photographing unit 1 are the original. The center of the restoring torque to be restored to the shape can be disposed between the front photographing unit drive mechanisms 251x and 251y and the rear photographing unit drive mechanisms 252x and 252y.
  • these positions can be matched between the front photographing unit drive mechanisms 251x and 251y and the rear photographing unit drive mechanisms 252x and 252y. Accordingly, the swing center of the photographing unit 1 can be arranged at a position close to the leaf spring 195. As a result, since the force acting on the leaf spring 195 when the photographing unit 1 swings is reduced, the photographing unit drive mechanism can swing the photographing unit 1 with a small torque. Further, the spring force of the leaf spring 195 supporting the photographing unit 1 so as to be swingable may be small. Therefore, the photographing unit 1 can be displaced efficiently.
  • the center of gravity G of the photographing unit 1 is located between the front photographing unit driving mechanisms 251x and 251y and the rear photographing unit driving mechanisms 252x and 252y and is located near the leaf spring 195. It is possible to reduce or avoid tilting the photographing unit 1 with respect to the photographing optical device 200B when the posture of the photographing optical device 200B is changed. As a result, it is not necessary to secure a range in which the photographing unit 1 is tilted depending on the posture of the photographing optical device 200B as a movable range of the photographing unit 1, so that the photographing optical device 200B can be downsized.
  • the photographing unit 1 can be displaced efficiently. Further, since the movable range of the photographing unit 1 is reduced, for example, when a restricting member that restricts the movable range of the photographing unit 1 is disposed, the gap between the photographing unit 1 and the restricting member can be narrowed. . As a result, the impact that occurs even when the photographing unit 1 collides with the regulating member when the photographing optical device 200B receives an impact or the like is reduced, so that deformation of the photographing unit 1 can be prevented. Therefore, the photographing optical device 200B can be a device resistant to impact. Furthermore, since no structure for supporting the photographing unit 1 is required outside the photographing unit 1 in the Z-axis direction, the photographing optical device 200B can be configured thin in the Z-axis direction.
  • the leaf spring 195 can be deformed around the X axis, the Y axis, and the Z axis, and the photographing unit 1 is supported so as to be displaceable around the X axis, the Y axis, and the Z axis. ing. Therefore, when the center of the thrust by the first and second photographing unit drive mechanisms 250x and 250y, the center of the restoring torque by the leaf spring 195, and the center of the photographing unit 1 are close to each other, the photographing optical device 200B. If a strong impact is applied to the image capturing unit 1, the image capturing unit 1 may move in a wide range, but the image capturing unit 1 is difficult to move in the X axis direction and the Y axis direction. Further, in the Z-axis direction, the arm portion 195d is deformed following the displacement of the photographing unit 1, so that the leaf spring 195 is not damaged.
  • the energization control unit controls the energization of the first and second imaging unit drive mechanisms 250x and 250y to the coil 231x, the coil 232x, the coil 231y, and the coil 232y, so It is possible to swing around the axis and the Y axis, and it is possible to move the photographing unit 1 in the Z-axis direction. Further, the photographing unit 1 is pressed against the base by the leaf spring 195 when the first and second photographing unit drive mechanisms 250x and 250y are not operating, and when the shake correction mechanism is operated, the first and second photographing units are operated.
  • the unit driving mechanisms 250x and 250y generate a magnetic driving force that separates the photographing unit 1 from the base against the urging force of the leaf spring 195.
  • the photographing unit 1 is fixed to the base 220 and moves while the first and second photographing unit drive mechanisms 250x and 250y are not operating, such as when the photographing optical device 200B is being carried. There is nothing. Therefore, when the photographic optical device 200B is carried, for example, vibrations applied to the photographic optical device 200B do not generate noises and noises that rattle between the photographing unit 1 and the fixed body 210.
  • a magnetic spring is configured by disposing a magnetic body that exerts a magnetic attractive force between the fixed body 210 and the imaging unit 1 driving magnet, and the imaging unit 1 is pressed against the magnetic spring against the base. The biasing force may be exerted.
  • FIG. 14A is a perspective view of the photographing optical apparatus according to Embodiment 4 to which the present invention is applied as viewed obliquely from the upper side on the subject side
  • FIG. 14B is a side view thereof
  • FIG. ) Is a partial perspective view showing a peripheral portion of the flexible printed circuit board 183.
  • FIG. 14A and 14B, the fixed body 210 is indicated by a dotted line so that the support structure of the photographing unit 1 can be seen.
  • the optical device for photographing 200 ⁇ / b> C of this embodiment uses a wiring member having elasticity as a spring member that supports the photographing unit 1. More specifically, the flexible printed circuit board 183 for supplying power and transmitting signals between the photographing unit 1 and the shake detection sensor 182 and an external device is employed as a spring member.
  • the support structure of the photographing unit 1 except for the support structure of the photographing unit 1, the same structure as that of the optical device for photographing according to the second embodiment is provided. Therefore, the support structure of the photographing unit will be described, and other description will be omitted.
  • the photographing unit 1 has a rectangular shape when viewed from the optical axis L direction, and a shake detection sensor 182 and the shake detection sensor 182 are fixed to the rear side of the photographing unit 1.
  • a rectangular plate 188 is attached. From the vicinity of each corner portion of the plate 188, four flexible printed circuit boards 183 (1) to (4) connected to the shake detection sensor 182 are drawn out.
  • a relay flexible printed circuit board 183 (5) for supplying power and transmitting signals between the image capturing unit 1 and an external device is drawn out from the image capturing unit 1, and this relay flexible printed circuit board 183 (5 ) Is bent into a C-shape in the Z-axis direction and then connected to the lead-out portion of the flexible printed circuit board 183 (3).
  • the four flexible printed circuit boards 183 (1) to (4) are respectively fixed width portions 183a extending in the X-axis direction or the Y-axis direction along the outer peripheral edge of the plate 188 and the outer peripheral wall of the photographing unit 1. And a wide portion 183b formed at the end portion of the constant width portion 183a. The wide portion 183b is attached to the fixed cover 230 side.
  • the photographing unit 1 is supported by four flexible printed boards 183 (1) to (4) so as to be displaceable around the X axis, the Y axis, the X axis direction, the Y axis direction, and the Z axis direction.
  • the material of the film-like insulator constituting the flexible printed boards 183 (1) to (4) is selected. What is necessary is just to make it a highly rigid thing or to increase the number of layers currently formed in the thickness direction. Further, the spring constant can be increased by moving the attachment position to the fixed cover 230 to a position close to each corner portion of the plate 188 and shortening the length of the constant width portion 183a. Furthermore, a desired spring constant can also be ensured by changing the copper foil shape and the copper foil thickness of each flexible printed circuit board 183. Further, by attaching a separate part made of metal or resin to each flexible printed circuit board 183 (1) to (4), the spring constant of each flexible printed circuit board 183 (1) to (4) can be secured.
  • the wiring pattern is arranged on one surface side, and the other surface side is entirely made of copper foil, or the other surface A desired spring constant may be secured by attaching a metal plate to the side.
  • the copper foil or metal plate also functions as an electromagnetic shield.
  • the four flexible printed boards 183 (1) to (4) may include dummy flexible printed boards that are not used for power supply or signal transmission.
  • the imaging optical device 200C of the present embodiment flexible printing is performed for supplying power to the shake detection sensor 182 and the image sensor and transmitting signals between the shake detection sensor 182 and the image sensor and an external device. Since the photographing unit 1 is supported by the substrates 183 (1) to (4), no spring member is required. Therefore, the configuration of the photographing optical device 200C can be simplified. Further, since the flexible printed circuit boards 183 (1) to (4) are provided with the adhesive layer, a damping effect by the adhesive layer can be obtained.
  • the material for forming the fixed cover 230 and the base 220 is not particularly defined. However, if the fixed cover 230 and the base 220 are made of a magnetic material, the first and second photographing are performed. Magnetic flux leakage from the unit drive mechanisms 250x and 250y to the outside can be prevented. Further, it is possible to reduce the influence of the external magnetic flux entering the first and second photographing unit drive mechanisms 250x and 250y and affecting the posture of the photographing unit 1.
  • FIG. 15 is a longitudinal sectional view showing a configuration example of an imaging optical device in which the fixed cover 230 and the base 220 are formed of a magnetic material.
  • FIG. 16 is a view of the photographing optical device shown in FIG. 15 as viewed from obliquely above on the subject side, with the fixed cover 230, a part of the photographing unit driving coils 230x and 230y, the first spring 191 and the frame body 193 removed. It is a perspective view.
  • the photographing optical apparatus according to the present embodiment has a configuration corresponding to that of the photographing optical apparatus 200B according to the second embodiment, and therefore, corresponding parts are denoted by the same reference numerals and description thereof is omitted.
  • the fixed cover 230 and the base 220 are formed of a magnetic material.
  • the fixed cover 230 includes only a cylindrical body 235 having a rectangular tube shape.
  • the first and second photographing unit driving mechanisms 250x and 250y are covered with the fixed cover 230 made of a magnetic material, the first and second photographing unit driving mechanisms 250x, The leakage magnetic flux from 250y to the outside can be reduced. Further, since the fixed cover 230 acts as a magnetic collecting yoke, the linkage flux interlinking with the imaging unit driving coils 230x and 230y increases, and the first and second imaging unit driving mechanisms 250x and 250y change the posture of the imaging unit 1. A large thrust can be obtained when displacing. Accordingly, the response to vibration is excellent. Furthermore, it is possible to reduce external magnetic fluxes from entering the first and second photographing unit drive mechanisms 250x and 250y and affecting the posture of the photographing unit 1.
  • the fixed cover 230 is formed of a magnetic material
  • a magnetic attractive force is generated between the imaging unit driving magnets 240x and 240y attached to the imaging unit 1 and the fixed cover 230.
  • the displacement of the photographing unit 1 by the shake correction mechanism may be affected.
  • the imaging unit driving magnet 240x of the first imaging unit driving mechanism 250x and the imaging unit driving of the second imaging unit driving mechanism 250y which are adjacent to each other around the Z axis.
  • the magnet 240y is arranged so that the magnetic poles in the Z-axis direction face different directions.
  • the magnetic attraction force between the photographing unit driving magnets 240x and 240y attached to the photographing unit 1 and the fixed cover 230 is reduced by the upper plate. May act on the part to urge the photographing unit 1 in the Z direction.
  • the photographing unit 1 since the upper plate portion is removed from the fixed cover 230, the photographing unit 1 can be prevented from being biased in the Z direction by the magnetic attractive force. Therefore, it is possible to reduce the influence of the magnetic attraction force between them on the displacement of the photographing unit 1.
  • the base 220 when the base 220 is formed of a magnetic material, a magnetic attractive force is generated between the imaging unit driving magnets 240 x and 240 y attached to the imaging unit 1 and the base 220. If it is desired to avoid being biased downward in the Z direction by this magnetic attractive force, the base 220 may be formed from a non-magnetic material.
  • the fixed cover 230 is formed of a magnetic material, a magnetic attractive force is generated between the imaging unit driving magnets 240x and 240y attached to the imaging unit 1 and the fixed cover 230. Therefore, if the center of the imaging unit driving magnets 240x and 240y in the Z-axis direction is shifted from the center of the fixed cover 230 in the Z-axis direction, the imaging unit 1 is attracted toward one of the Z-axis directions. Magnetic attraction can be exerted.
  • the upper plate portion of the fixed cover 230 is removed, so that when the positions of the fixed cover 230 and the photographing unit 1 are adjusted during the assembly operation of the photographing optical device 200D, the subject side Since the gap between the fixed cover 230 and the photographing unit 1 can be monitored with an image sensor or the like and the positional relationship between the two can be confirmed, assembly with high positional accuracy becomes possible.
  • FIG. 17 is a perspective view of a photographing optical device in which a part of the fixed cover 230 is made of a magnetic material and the other part is made of a nonmagnetic material.
  • the fixed cover 230 when viewed from a direction orthogonal to the optical axis L, the fixed cover 230 includes a moving region that overlaps with the moving range of the photographic unit driving magnet (the hatched line in the figure).
  • the portion 230a is a magnetic material
  • the other portion 230b is a nonmagnetic material. Therefore, the fixed cover 230 includes a first cover part (part 230b) made of a nonmagnetic material and a second cover part (part 230a) made of a magnetic material.
  • the portion made of the magnetic material of the fixed cover 230 covers the first and second imaging unit driving mechanisms 250x and 250y from the outer peripheral side, so the first and second imaging unit driving mechanisms 250x,
  • the leakage magnetic flux from 250y to the outside can be reduced.
  • the fixed cover 230 acts as a magnetic collecting yoke, the linkage flux interlinking with the imaging unit driving coils 230x and 230y increases, and the first and second imaging unit driving mechanisms 250x and 250y change the posture of the imaging unit 1.
  • a large thrust can be obtained when displacing. Accordingly, the response to vibration is excellent.
  • the part formed from the magnetic material and the part formed from the non-magnetic material can be formed as separate parts and can be combined to form the fixed cover 230, or can be an integrally molded product. it can.
  • the fixed cover 230 is formed on this portion.
  • a plate-like magnetic body may be attached from the outside of the plate. As a magnetic body, what consists of well-known materials, such as iron, can be used.
  • FIG. 18 is a longitudinal sectional view of the XZ plane of the photographing optical apparatus schematically showing the peripheral portion of the yoke 16 of the photographing optical apparatus of this embodiment.
  • the yoke 16 includes a rectangular top plate 161 on the subject side having an opening 161a formed in the center, and four side plates 162 extending rearward from the outer peripheral edge of the top plate 161.
  • the relay plate portion 197 extends from the lower end edge of the side plate portion 162 to the outer peripheral side, and the coil-side magnetic flux collecting yoke portion 198 extends from the outer peripheral edge of the relay plate portion 197 to the front side. is doing.
  • the photographing unit driving coils 230x and 230y are attached to the fixed cover 230 so as to have a gap between them and the fixed cover 230 in the direction orthogonal to the optical axis L.
  • the imaging unit driving magnets 240x and 240y are opposed to each other on the opposite side of the imaging unit driving coils 230x and 230y.
  • the fixed cover 230 is made of a nonmagnetic material.
  • the imaging unit driving magnets 240x and 240y and the imaging unit driving coils 230x and 230y of the first and second imaging unit driving mechanisms 250x and 250y are surrounded by the yoke 16, so Leakage magnetic flux from the second photographing unit drive mechanisms 250x and 250y can be reduced. Further, since the linkage flux interlinking with the imaging unit driving coils 230x and 230y increases, a large thrust is obtained when the first and second imaging unit driving mechanisms 250x and 250y displace the attitude of the imaging unit 1. Can do. Accordingly, the response to vibration is excellent. Furthermore, it is possible to reduce external magnetic fluxes from entering the first and second photographing unit drive mechanisms 250x and 250y and affecting the posture of the photographing unit 1.
  • the vertical cross-sectional shape of each of the photographing unit driving coils 230x and 230y is set to a long lower trapezoidal shape so that the movable unit is movable.
  • the vertical cross-sectional shape of each of the photographing unit driving coils 230x and 230y is made rectangular.
  • the magnets (shooting unit driving magnets 240x and 240y) are held on the photographing unit 1 side which is the movable body side, and the fixed body.
  • the shooting unit driving coil is held on the shooting unit 1 side, which is the movable body side, and a shooting unit on the fixed body 210 side.
  • a configuration in which the driving coil is held may be employed.
  • the photographing unit 1 is displaced in the X-axis direction by the first photographing unit driving mechanism 250x, and the photographing unit 1 is displaced in the Y-axis direction by the second photographing unit driving mechanism 250y.
  • the photographing unit driving magnet and the photographing unit driving coil may be arranged so that the photographing unit 1 is displaced in the Y-axis direction by 250x and the photographing unit 1 is displaced in the X-axis direction by the second photographing unit drive mechanism 250y. Good.
  • the imaging unit driving magnet is configured by arranging two magnets magnetized in a single pole so that the magnetizing directions are opposite to each other, but one magnet is magnetized in two poles. It can also be used.
  • both the first photographing unit drive mechanism 250x and the second photographing unit drive mechanism 250y are provided for the photographing unit 1, but only the shake in the direction in which the shake is likely to occur when the user uses it.
  • the present invention may be applied when only one of the first photographing unit drive mechanism 250x and the second photographing unit drive mechanism 250y is provided so as to correct.
  • the present invention is applied to the photographing optical device 200 using the photographing unit 1 in which the lens driving coils 30 s and 30 t are square cylinders and the lens driving magnet 17 is a flat plate.
  • the present invention may be applied to a photographing optical apparatus using a photographing unit having a configuration in which 30s and 30t are cylindrical, the case 18 is a rectangular tube, and the lens driving magnet 17 is disposed at a corner portion of the case 18. .
  • the example in which the present invention is applied to the photographing optical device 200 used in the camera-equipped mobile phone has been described.
  • the example in which the present invention is applied to the photographing optical device 200 used in a thin digital camera or the like is described. Also good.
  • the lens driving mechanism 5 that magnetically drives the moving body 3 including the lens 121 in the optical axis direction in addition to the lens 121 and the imaging device 155 in the photographing unit 1 is supported on the support 2.
  • the present invention may be applied to a fixed focus type optical apparatus for photographing in which the lens driving mechanism 5 is not mounted on the photographing unit 1.
  • the photographing unit including the lens and the imaging element is described as the movable module.
  • the present invention can be applied to an optical unit including at least a lens as the movable module. Examples of the unit include a laser pointer and a portable or vehicle-mounted projection display device.
  • the lens driving mechanism 5 magnetically drives the moving body 3 including the lens 121 in the optical axis direction.
  • the piezoelectric body is used to move the moving body 3 including the lens 121 in the optical axis direction.
  • a lens driving mechanism that drives the lens.
  • a lens driving mechanism using a piezoelectric element for example, a cylindrical piezoelectric element is used as a stator, a rotor is pressed against an annular end surface of the stator, and high-frequency alternating current is applied to the piezoelectric element to generate ultrasonic vibrations in the stator.
  • the rotor is rotated by rotating the rotor, the rotational motion of the rotor is converted into a linear motion, and the moving body is moved in the optical axis direction.

Abstract

L'invention porte sur un dispositif d'imagerie optique qui améliore la structure d'un mécanisme d'entraînement d'unité d'imagerie pour une correction de vibrations dans une unité d'imagerie et peut corriger de façon fiable les vibrations. L'invention concerne en particulier un dispositif d'imagerie optique (200) dans lequel une unité d'imagerie (1) est déplacée pour corriger les vibrations, l'unité d'imagerie (1) étant supportée sur un objet fixe (210) par un total de quatre fils de suspension (190). Un premier mécanisme d'entraînement d'unité d'imagerie (250x) et un second mécanisme d'entraînement d'unité d'imagerie (250y) sont disposés sous la forme d'une paire à deux positions de chaque côté de l'axe optique L. Dans les mécanismes d'entraînement d'unité d'imagerie, des aimants d'entraînement d'unité d'imagerie (240x), (240y) sont maintenus sur le côté unité d'imagerie (1), qui est le côté mobile, et des bobines d'entraînement d'unité d'imagerie (230x), (230y) sont maintenues sur le côté objet fixe (210).
PCT/JP2009/001914 2008-04-30 2009-04-27 Unité optique avec fonction de correction de vibrations WO2009133691A1 (fr)

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CN2009801158880A CN102016708B (zh) 2008-04-30 2009-04-27 带抖动修正功能的光学单元
US12/914,448 US8224169B2 (en) 2008-04-30 2010-10-28 Optical unit with shake correcting function

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JP2008118578 2008-04-30
JP2008-118578 2008-04-30
JP2008-147187 2008-06-04
JP2008147187A JP5106254B2 (ja) 2008-06-04 2008-06-04 撮影用光学装置
JP2008-334724 2008-12-26
JP2008334724A JP5140573B2 (ja) 2008-04-30 2008-12-26 振れ補正機能付き光学ユニット

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CN110531480A (zh) * 2014-03-05 2019-12-03 Lg伊诺特有限公司 透镜移动单元和包含该透镜移动单元的摄像头模块
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