WO2006043358A1 - レンズ駆動装置、撮像装置、撮像機器、レンズ位置の調整方法及びレンズ駆動方法 - Google Patents
レンズ駆動装置、撮像装置、撮像機器、レンズ位置の調整方法及びレンズ駆動方法 Download PDFInfo
- Publication number
- WO2006043358A1 WO2006043358A1 PCT/JP2005/013691 JP2005013691W WO2006043358A1 WO 2006043358 A1 WO2006043358 A1 WO 2006043358A1 JP 2005013691 W JP2005013691 W JP 2005013691W WO 2006043358 A1 WO2006043358 A1 WO 2006043358A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- optical axis
- lens frame
- coil
- subject
- Prior art date
Links
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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
-
- 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
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
- G03B3/10—Power-operated focusing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
Definitions
- the present invention relates to a lens driving device that drives a lens, an imaging device using the lens driving device, an imaging device, a lens position adjusting method, and a lens driving method.
- Patent Documents 1 and 2 Conventionally, various methods for adjusting the initial position of a lens have been proposed for a camera that adjusts the focus by moving the lens! (For example, Patent Documents 1 and 2).
- a male screw formed on the outer peripheral surface of a lens frame that holds a lens and a female screw provided on a lens barrel on which an image sensor is mounted are screwed together, and the lens frame is rotated.
- This lens frame is moved in the optical axis direction with respect to the lens barrel, and the initial position of the lens with respect to the imaging surface of the imaging device is adjusted.
- the method described in Patent Document 2 is provided with a ring-shaped cam mechanism between the lens frame and the lens barrel, and this cam mechanism moves the lens frame relative to the lens barrel in the optical axis direction. Adjusting the initial position is a problem.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002- 374439 (paragraph 0009, FIG. 1)
- Patent Document 2 JP-A-7-67017 (paragraph 0017, FIG. 3)
- a lens driving device that drives a lens using a voice coil motor instead of the conventional stepping motor that meets the demand for downsizing of the imaging device has been proposed.
- the voice coil motor can be driven linearly, and unlike the stepping motor, it is not necessary to convert rotational motion into linear motion. Therefore, the imaging device can be made smaller than when a stepping motor is used. it can.
- the voice coil motor when used for lens driving, it is necessary to adjust the initial position of the lens when assembling the lens driving device. That is, in the case of a stepping motor, since it has a holding force even when no current is flowing (non-energized state), the lens is moved by the motor after the camera is started to focus the lens on the solid-state imaging device, and then The lens can be held at the in-focus position in a non-energized state.
- the lens cannot be held at an arbitrary position in a non-energized state. Therefore, it is necessary that the lens is in focus so that the subject and the composition can be determined during preview in a non-energized state (to reduce power consumption). In this case, it is effective to adjust the initial position of the lens so as to focus on infinity in a non-conductive state, that is, in a state where the lens is in the initial position.
- the present invention has been made in view of such problems, and an object thereof is to reduce the size of the lens driving device.
- a lens driving device includes:
- a fixed portion having a guide shaft that slidably engages with the guide hole and guides the lens frame in the optical axis direction;
- a yoke to which the magnet is attached
- the yoke is movable in the optical axis direction
- the lens driving device according to the present invention is configured as described above, the lens driving device itself can be downsized.
- FIG. 1 is a plan view of a lens driving device according to Embodiment 1 of the present invention.
- FIG. 2 is a side sectional view (a) of the lens driving device according to Embodiment 1 of the present invention and a sectional view (b) showing an enlarged part.
- FIG. 3 is a perspective view of a lens driving device according to Embodiment 1 of the present invention.
- FIG. 4 is a rear view of the lens driving apparatus according to Embodiment 1 of the present invention.
- FIG. 5 is a cross-sectional view showing a magnetic circuit of the lens driving device according to Embodiment 1 of the present invention.
- FIG. 6 is a perspective view of a lens driving device according to Embodiment 2 of the present invention.
- FIG. 7 is a diagram showing the shape of a lens eccentric pin according to Embodiment 2 of the present invention.
- FIG. 8 is a side view of a lens driving device according to Embodiment 3 of the present invention.
- FIG. 9 is an exploded perspective view of a lens driving device according to Embodiment 3 of the present invention.
- FIG. 10 is an exploded perspective view of a lens driving device according to Embodiment 3 of the present invention.
- FIG. 11 is a perspective view of an imaging apparatus according to Embodiment 4 of the present invention.
- FIG. 12 is a perspective view of an imaging apparatus according to Embodiment 4 of the present invention.
- FIG. 13 is an exploded perspective view of a shutter mechanism section according to Embodiment 4 of the present invention.
- 14 A sectional view for explaining the structure and operation of a lens driving device according to Embodiment 5 of the present invention.
- FIG. 16 is a cross-sectional view for explaining the operation of the lens driving device according to the fifth embodiment of the present invention.
- FIG. 17 is a timing chart illustrating an example of the operation of the lens driving device according to Embodiment 5 of the present invention.
- FIG. 18 is a timing chart for explaining another example of the operation of the lens driving device according to the fifth embodiment of the present invention.
- FIG. 19 is a cross-sectional view for explaining the structure and operation of a lens driving device according to Embodiment 6 of the present invention.
- FIG. 20 is a timing chart for explaining an example of the operation of the lens driving device according to the sixth embodiment of the present invention.
- FIG. 21 is a timing chart for explaining another example of the operation of the lens driving device according to the sixth embodiment of the present invention.
- FIG. 22 is a perspective view for explaining a modification to the first to sixth embodiments of the present invention.
- the initial position of the lens is adjusted by moving the entire magnet and force acting actuator. That is, in the lens driving device according to the present embodiment, the guide shaft that restricts the movement of the movable portion is supported by the housing of the imaging device to which the lens driving device is attached, and the screw portion and the yoke formed on the guide shaft. It is possible to move the entire actuator by screwing together the screw part formed in
- FIG. 1 is a plan view showing a lens driving device 10 according to the present embodiment.
- FIG. 2A is a cross-sectional view (YZ cross-sectional view) of the lens driving device 10 taken along the line II—II shown in FIG.
- the lens driving device 10 is used as an autofocus mechanism (autofocus mechanism) for a single focus lens in an image pickup apparatus (for example, a small camera) mounted on an image pickup device (for example, a mobile phone).
- the lens driving device 10 moves the lenses 2a and 2b (FIG. 2 (a)) along the optical axis A, and forms an object image on the solid-state imaging device 91 (FIG. 2 (a)). It is something to be made.
- the lens driving device 10 includes a lens frame 3 that holds the lenses 2a and 2b so that their optical axes are coaxially positioned, and the lens frame.
- a guide shaft 4 that movably supports 3 and a yoke 6 to which the guide shaft 4 is fixed are provided.
- the direction of the optical axis A (FIG. 2 (a)) of the lenses 2a and 2b is the Z direction, and one direction in the plane perpendicular to the optical axis A (FIGS. 1 and 2).
- the left and right direction in (a) is the Y direction.
- the direction perpendicular to the Y direction in the plane perpendicular to the optical axis A is defined as the X direction.
- Z direction In this case, the direction of the force on the subject is set upward (ie, + Z direction), and in the opposite direction, that is, the direction of force on the solid-state imaging device 91 described later is set downward (ie, the ⁇ Z direction).
- the lens frame 3 is integrally formed so as to be adjacent to the frame portions 31, 32 holding the lenses 2a, 2b in the Y direction (the radial direction of the lenses 2a, 2b) with respect to the frame portions 31, 32.
- the support part 33 is provided.
- the support portion 33 has a shape that is long in the Y direction.
- a guide hole 35 penetrating in the Z direction is formed in the support portion 33 of the lens frame 3, and the above-described guide shaft 4 is slidably penetrated through the guide hole 35.
- FIG. 2 (b) is a view showing the lower end portion of the guide shaft 4, and FIG. 2 (a) is an enlarged view showing a portion surrounded by a circle B.
- a male screw 4 a is formed at the lower end of the guide shaft 4 and is screwed into a female screw 6 a formed on the yoke 6.
- the front end of the male screw 4a of the guide shaft 4 penetrates the yoke 6 and protrudes further downward, and is inserted into a recess 11a formed at the bottom of the housing 11 of the imaging device.
- the guide shaft 4 is positioned so as to be rotatable about the shaft center.
- the recess 11a is schematically illustrated in FIG.
- a groove 4b for rotating the guide shaft 4 about the shaft center with a tool is formed at the upper end of the guide shaft 4.
- the groove 4b may be a force-brush shape having a minus shape or another shape.
- the lens frame 3 can be moved in the Z direction along the guide shaft 4 by sliding between the guide shaft 4 and the guide hole 35.
- a stopper is provided at each position where the lens frame 3 contacts when the movement limit in the + Z direction and the movement limit in the Z direction are reached. Yes. The stopper will be described later with reference to FIGS.
- FIG. 3 is a perspective view of the lens driving device 10 shown in FIG. 1
- FIG. 4 is a rear view of the lens driving device 10 shown in FIG. 1 as viewed in the Y direction.
- the yoke 6 is formed, for example, by bending a plate-like member into a U-shape, and has a bottom 63 and walls 61 and 62 extending upward from both ends of the bottom 63 in the X direction.
- the bottom 63 is formed with a female screw 6a (FIG. 2 (b)) that is engaged with a male screw 4a formed at the lower end of the guide shaft 4.
- Magnets 7 are attached to the inner surfaces of the above-described walls 61 and 62 so as to sandwich the coil 5 in the X direction.
- each The magnet 7 faces the side of the coil 5 that extends in the Y direction.
- a rotation preventing member for example, a guide rib id shown in FIG. 6 is provided in the housing 11 of the imaging apparatus so that the yoke 6 does not rotate around the guide shaft 4.
- the wall 62 on the front side of the yoke 6 is cut away.
- the coil 5, the yoke 6, the magnet 7, and the guide shaft 4 (also functioning as a yoke) realize the function as the actuator.
- the movement limit in the + Z direction of the lens frame 3 is the position where the upper surface 33c of the projection 33b provided on the side surface of the support portion 33 and the bottom surface 7a of the magnet 7 are in contact with each other. It is.
- the movement limit of the lens frame 3 in the Z direction is a position where the bottom surface 33 a of the support portion 33 is in contact with the upper surface 63 a of the bottom portion 63 of the yoke 6.
- the yoke 6 and the guide shaft 4 are each made of a magnetic material, and constitute a magnetic circuit (described later) including the magnet 7.
- a coil holding portion 34 (FIG. 2 (a)) is formed above the support portion 33 of the lens frame 3.
- a coil 5 is wound around the coil holding part 34 so as to surround the periphery of the guide shaft 4.
- the coil 5 is wound in a substantially rectangular shape so as to have two sides in the X direction and two sides in the Y direction.
- the solid-state image sensor 91 is fixed to the housing 11 of the imaging device by bonding its knock to the housing 11 with an adhesive or the like.
- a circuit board 92 is fixed and electrically connected to the solid-state imaging element 91.
- both the solid-state imaging element 91 and the circuit board 92 may be fixed to the casing 11 with an adhesive, and only the circuit board 92 is fixed to the casing 11 with an adhesive.
- 91 may be fixed to the housing 11 indirectly.
- the housing 11 and the circuit board 92 form a fixing portion. Note that the image sensor 91 and the guide shaft 4 fixed to these may be included in the fixed portion.
- a magnetic piece 8 made of a magnetic material is fixed on the upper surface of the lens frame 3 so as to be positioned above the coil 5.
- the magnetic piece 8 is always positioned above the center position of the magnet 7 in the Z direction (+ Z side, that is, the subject side) when the lens frame 3 is in the movable range in the Z direction. Is arranged. This is because the magnetic piece 8 tends to move to the approximate center in the Z direction of the magnet 7 when energization to the coil 5 is stopped. Position that contacts the upper surface 63a of the bottom 63 This is because the lens frame 3 is held in place.
- FIG. 5 is a schematic diagram for explaining a magnetic circuit of the lens driving device 10 and corresponds to a cross-sectional view (XZ cross-sectional view) taken along line IV—IV in FIG.
- the two magnets 7 are arranged symmetrically with respect to the guide shaft 4 in the X direction.
- Each magnet 7 is magnetized in the X direction so that the surface fixed to the yoke 6 has an N pole and the side facing the coil 5 has an S pole.
- the side force in the Y direction of the coil 5 is located between the S pole of the magnet 7 and the guide shaft 4.
- the magnetic field lines of N poles of the magnet 7 travel along the wall parts 61 and 62 and the bottom part 63 of the yoke 6 and further pass through the guide shaft 4 to the S pole of the magnet 7 via the coil holding part 34 and the coil 5. Reach.
- a current is passed through the coil 5 an electromagnetic force in the axial direction of the guide shaft 4 (that is, the Z direction) is generated in the coil 5 due to the action of the current and the magnetic field generated by the magnet 7.
- a current is supplied to the coil 5 in a direction in which an electromagnetic force in the + Z direction (upward) is generated.
- the magnetic piece 8 is always urged by the magnetic field generated by the magnet 7 toward a substantially central position in the Z direction of the magnet 7 (that is, a position having the highest magnetic flux density). As described above, this utilizes the property that when the energization of the coil 5 is stopped, the magnetic piece 8 tends to move to the approximate center of the magnet 7 in the Z direction.
- the movable range of the lens frame 3 is determined so that the magnetic piece 8 is always located at the + Z direction side (subject side) from the center of the magnet 7 in the Z direction.
- the urging force in the Z direction is acting. From the viewpoint of obtaining a large urging force, it is desirable that the magnetic piece 8 is made of a soft magnetic material such as nickel! /.
- the lens frame 3 When an electromagnetic force in the + Z direction is generated by passing a current in the coil 5 in a predetermined direction, the lens frame 3 causes the magnetic piece 8 to receive from the magnet 7—the guide shaft against the urging force in the Z direction. Move along +4 in the + Z direction.
- the magnitude of the electromagnetic force can be changed by changing the value of the current flowing through the coil 5, and the lens frame 3 is moved to the guide shaft 4 until the + Z direction electromagnetic force and the Z direction biasing force are balanced. Can be moved along.
- the lens frame 3 when the lens frame 3 is at the limit of movement in one Z direction, the light from the object at infinity is reflected.
- the images 2a and 2b form an image on the imaging surface of the solid-state imaging device 91. From this state, by moving the lenses 2a and 2b in the + Z direction (subject side), a subject image at a closer position can be formed on the solid-state image sensor 91. As a result, any subject from infinity to a close position can be photographed with autofocus.
- the magnet 7 overlaps the upper side of a part (indicated by reference numeral 32a) of the large-diameter frame portion 32 that holds the large-diameter lens 2b.
- a gap C larger than the movement amount E of the lens frame 3 is formed between the portion 32a of the large-diameter frame 32 and the magnet 7, the lens frame 3 Does not touch the magnet 7 even if it moves in the Z direction.
- the lens driving device 10 of the present embodiment when the groove 4b formed at the upper end of the guide shaft 4 is used to rotate with a tool, the male screw 4a formed on the guide shaft 4 rotates. Since the male screw 4a of the guide shaft 4 and the female screw 6a formed on the yoke 6 are screwed together, the yoke 6 moves in the optical axis A direction by rotating the guide shaft 4.
- the lens frame 3 is urged in the Z direction by the magnetic piece 8 and the magnet 7, and the bottom surface 33a of the lens frame 3 and the top surface 63a of the bottom 63 of the yoke 6 are in contact with each other. If it is moved in the direction, the lens frame 3 is also moved at the same time, and the focal position of the lenses 2a, 2b and the imaging surface of the solid-state imaging device 91 can be adjusted.
- the lens driving device 10 can be further downsized by reducing the structure for adjusting the initial lens position as described above.
- the entire actuator including the lens frame 3 and the yoke 6 can be moved in the optical axis direction with a simple configuration. Can be made.
- the movement limit in the + Z direction of the lens frame 3 is defined by the contact between the projection 33b of the lens frame 3 and the magnet 7, and the lens frame 3 is defined by the contact between the bottom surface 7a of the lens frame 3 and the bottom 63 of the yoke 6. Since the movement limit in the -Z direction of 3 is specified, the movement range of the lens frame 3 can be regulated without providing a separate stopper.
- the entire actuator consisting of the coil attached to the movable portion holding the lens, the magnet, and the yoke is driven. . That is, the lens driving device according to the present embodiment adjusts the initial position of the lens by moving the entire actuator including the yoke, coil, and magnet in the optical axis direction by the eccentric pin arranged on the side surface of the yoke. It is a configuration.
- FIG. 6 is a perspective view showing the lens driving device 12 according to Embodiment 2 of the present invention.
- FIG. 7 is a diagram showing the shape of the eccentric pin 15 used in the lens driving device 12 according to the present embodiment. 6 and 7, the same components as those described in Embodiment 1 (FIGS. 1 to 5) are denoted by the same reference numerals.
- a long hole 6 b is formed in one wall portion 61 of the yoke 6.
- the guide shaft 4 passes through a hole formed in the bottom surface 63 of the yoke 6 and is fitted to the bottom surface of the housing 11.
- the yoke 6 is movable in the optical axis A direction along the guide shaft 4. .
- a hole l ib is formed at a position facing the long hole 6 b formed in the wall portion 61 of the yoke 6.
- the guide rib l id provided on the inner side surface of the housing 11 fits to the side surface 6c of the other wall portion 62 of the yoke 6 and regulates the inclination when the yoke 6 moves in the optical axis A direction. ing.
- the length of the yoke 6 in the X direction is shown to be short in order to make it easy to apply a component between the components.
- the force is shown so that the guide rib l id is separated from the yoke 6.
- the outer side surface 6c of the wall 62 of the yoke 6 and the inner side surface of the housing 11 are opposed to each other with a narrow gap, and the guide rib l id prevents the yoke 6 from tilting or rotating. It is in contact with York 6.
- the eccentric pin 15 includes a cylindrical portion 15f, an eccentric pin 15g having a center at a position shifted in the radial direction with respect to the center of the tip surface of the cylindrical portion 15f, and a cylindrical portion 15f.
- a flange portion 15h formed at the rear end and a groove 15i for engaging a tool for rotating the eccentric pin 15 are configured.
- the hole l ib formed in the housing 11 has an inner diameter into which the cylindrical portion 15f can be inserted, as shown in FIG. 6, and a sliding reference surface 11c is formed on the inner side in the insertion direction. Is formed.
- the cylindrical portion 15f of the eccentric pin 15 is inserted into the hole l ib, the cylindrical side surface of the cylindrical portion 15f abuts against the sliding reference surface 11c, and the pin 15g passes through the hole l ib. It fits through the long hole 6b formed in the yoke 6 through.
- the yoke 6 In order to adjust the initial position of the lens, when the tool is engaged with the groove 15i and the eccentric pin 15g is rotated, the yoke 6 is light-transmitted through the elongated hole 6b fitted to the eccentric pin 15g. Move in axis A direction (Z direction). During this movement, the entire actuator consisting of the lens frame 3, the coil 5 and the magnet 7, which is connected only by the yoke 6, moves in the direction of the optical axis A.
- the eccentric pin 15 by using the eccentric pin 15, the lenses 2a and 2b that do not enlarge the lens driving device 12 (particularly in the lens radial direction) as in the first embodiment. It is possible to adjust the initial focal position between the image pickup surface of the solid-state image pickup device 91 and the solid-state image pickup device 91. That is, it is possible to adjust the initial position of the lens without increasing the size of the lens driving device 12. Furthermore, according to the present embodiment, since the eccentric pin 15 can be accommodated substantially within the thickness of the wall of the housing 11 of the imaging device, the size in the X direction of the imaging device can be reduced to / J. it can.
- the eccentric pin 15 is provided only on one wall portion 61 of the yoke 6 and the guide rib 1 Id is provided so as to contact only the one wall portion 62 of the yoke 6.
- the pin 15 may be provided on both wall portions 61 and 62, or the guide rib id may be provided so as to contact both wall portions 61 and 62.
- the shutter mechanism is provided on the subject side of the lens frame of the lens driving device.
- the shutter mechanism is mounted on the yoke.
- FIG. 8 is a side view showing the assembled state of the lens driving device 13 according to the present embodiment.
- FIG. 9 is a perspective view showing a state in which the lens driving device 13 is assembled.
- FIG. 10 is a perspective view showing a state before the shutter mechanism is attached to the yoke 6. 8 to 10, the same components as those described in Embodiment 1 (FIGS. 1 to 5) are denoted by the same reference numerals.
- the shutter mechanism 9 having the opening 9f (FIGS. 9 to 10) is disposed on the subject side of the lens 2a.
- the shutter mechanism section 9 has a housing 9g in which the opening 9f is formed that allows light incident on the lenses 2a and 2b (FIG. 2A, etc.) to pass therethrough.
- the housing 9g is formed with a reference mounting surface 9a facing downward (in the direction opposite to the subject). As shown in FIG. 10, the mounting reference surface 9a abuts on the reference surfaces 64 formed on the upper ends (ends on the subject side) of the wall portions 61 and 62 of the yoke 6, and thereby the shutter mechanism portion 9 Positioning in the optical axis A direction (ie Z direction) is performed.
- the shutter mechanism 9 has a contact surface 9c facing outward in the X direction at a portion protruding to the lower side (opposite to the subject) of the housing 9g. As shown in FIG. 10, the contact surface 9c abuts against the side surface 6d on the X direction inside of the wall portions 61 and 62 of the yoke 6, thereby positioning the shutter mechanism portion 9 in the X direction.
- the shutter mechanism 9 has ribs 9d and 9e on both sides in the Y direction with respect to the contact surface 9c.
- the ribs 9d and 9e are in contact with positioning reference surfaces 66 and 67 provided on both end surfaces in the Y direction of the upper portions of the wall portions 61 and 62 of the yoke 6 (portions where the reference surface 64 is formed), whereby the shutter Positioning of mechanism part 9 in the Y direction is performed.
- the shutter mechanism section 9 has a claw 9b projecting from the lower side of the housing 9g, and the claw 9b is fitted into the notch 65 provided in the both wall sections 61, 62 of the yoke 6.
- the shutter mechanism 9 is fixed to the yoke 6.
- the lens driving device 13 when adjusting the initial position of the lenses 2a and 2b with respect to the imaging surface of the solid-state imaging device 91, uses the shutter mechanism.
- the part 9 moves together with the yoke 6 in the Z direction.
- the distance between the lens 2a and the shirter mechanism unit 9 is the same as the lens 2a when the focus position is moved from the infinity position to the close position. , 2b needs to be secured in addition to the amount of movement of the lenses 2a, 2b when adjusting the initial lens position, in addition to the amount of movement of the lenses 2b toward the subject.
- the lens driving device 13 since the shutter mechanism 9 is fixed to the yoke 6, the lens 2a, 2b and the shutter mechanism 9 are not adjusted when the initial lens position is adjusted. Move together.
- the distance between the lens 2a and the shutter mechanism unit 9 only needs to secure an amount by which the lenses 2a and 2b are moved toward the subject when the infinite force is moved to the close position. That is, by fixing the shutter mechanism 9 to the yoke 6, the distance between the lens 2a and the shutter mechanism 9 can be shortened.
- the diameter of the opening 9f provided in the shutter mechanism 9 and the shutter blade (not shown) for shielding the opening 9f can be reduced in size as the position of the opening 9f is closer to the lens 2a. . Therefore, if the shutter mechanism 9 is fixed to the yoke 6 as in the lens driving device 13 according to the present embodiment, the opening 9f is compared to the structure in which the shutter mechanism 9 is fixed to the housing 11. In addition, the shutter blades can be made smaller, and thus the shirt mechanism portion 9 can be reduced in size.
- a portion (abutting reference) that abuts against the casing of the imaging device is provided on the subject side of the shutter mechanism.
- FIG. 11 and FIG. 12 are perspective views showing an imaging apparatus 40 according to Embodiment 4 of the present invention. 11 and 12, the same components as those described in the first embodiment (FIGS. 1 to 5) are denoted by the same reference numerals.
- FIG. 13 is a schematic diagram illustrating a configuration example of a general shutter mechanism unit.
- a general shutter mechanism unit includes a housing 9g made of a resin molded product, a shutter blade 9i housed in the housing 9g, and a shutter blade 9i.
- the motor 9h is attached to the housing 9g, and a sheet metal 9j that covers the subject side of the housing 9g.
- an imaging device incorporating a lens driving device is mounted on an imaging device (for example, a mopile device such as a mobile phone having an imaging function)
- the surface on the subject side of the imaging device is the inner surface of the housing of the imaging device. It is generally fixed by pressing it with an elastic part such as a sponge from the opposite side of the subject.
- the shutter When the structural part is incorporated, the subject side is made of a thin sheet metal, so that it may be deformed by abutting against the inner surface of the housing of an imaging device such as a mobile device.
- the imaging device 40 has a protrusion formed integrally with the casing 9g on the subject side surface (upper surface) of the casing 9g of the shutter mechanism section 9.
- Protrusions 9k, 91 are used as a reference for contact.
- One protrusion 9k is formed at each end in the X direction of the housing 9g.
- the protrusion 91 is formed along one end of the housing 9g in the Y direction.
- a protruding portion 9m is formed on the substantially lower side (side opposite to the subject) of the housing 9g.
- the lens driving device is incorporated into the imaging device (for example, a built-in camera) after the adjustment of the initial lens position described in the first embodiment or the like is completed.
- the protrusion 9m of the shutter mechanism unit 9 is Bonded and fixed to the Y-direction end surface (mating surface) l lj of the housing 11 of the imaging device at the opposite position.
- the protrusion 91 of the shutter mechanism section 9 has a side surface (Y-direction rear end surface) that is bonded and fixed to the mating surface 1 lk that is the facing surface of the housing 11 of the imaging device, thereby increasing the strength.
- the imaging device incorporating the lens driving device is mounted on an imaging device (for example, a mopile device such as a mobile phone having an imaging function)
- the projections 9k and 91 of the shutter mechanism unit 9 are imaged. Press against the inner surface of the device casing and hold it with a resilient component such as a sponge from the circuit board 92 side.
- the projections 9k and 91 are formed on the housing 9g of the shutter mechanism unit 9, and the projections 91k and 9m and the mating surfaces l lj and I lk of the housing 11 are bonded and fixed to each other. , 91 is increased in strength, so that deformation of the housing 9g of the shutter mechanism 9 is prevented.
- the protrusions 9k and 91 as the contact reference are formed integrally with the housing 9g of the shutter mechanism unit 9, and the protrusion 9m (close to the protrusion 9k) is formed.
- the strength of the projections 9k and 91, which are the abutting surfaces, is increased by bonding and fixing the side surfaces of the projections 91 and the projections 91 to the mating surfaces 1 lj and 1 lk of the housing 11. Even when the shutter mechanism unit 9 is attached to the imaging device 40 and is fixed to the inner surface of the casing of the imaging device, the deformation of the shutter mechanism unit 9 can be prevented.
- the light is incident using the shutter blade 9i of the shutter mechanism unit 9.
- the light blocking function was realized, in order to realize the light reduction function, the light reduction function may be realized using a light reduction mechanism equipped with a light reduction filter!
- an operation is performed in which an electric current is supplied to the coil 5 to move the lens frame 3 toward the solid-state image pickup element 91 and contact the reference plane. I started to do it.
- FIG. 14 to 16 are cross-sectional views for explaining the structure and operation of imaging apparatus 50 according to Embodiment 5 of the present invention.
- 14 to 16 the same components as those described in Embodiment 1 (FIGS. 1 to 5) are denoted by the same reference numerals.
- 17 and 18 are timing charts showing the operation of the imaging apparatus 50.
- FIG. 14 to 16 the same components as those described in Embodiment 1 (FIGS. 1 to 5) are denoted by the same reference numerals.
- 17 and 18 are timing charts showing the operation of the imaging apparatus 50.
- the lens frame 3 As shown in FIG. 14, in the lens driving device of the imaging device 50, the lens frame 3, the lenses 2a, 2b
- the coil 5 and the magnetic piece 8 constitute a lens frame unit 3a as a movable body.
- the magnetic piece 8 is urged toward the substantially central position in the Z direction of the magnet 7 by the magnetic field generated by the magnet 7, A so-called magnetic spring force is acting.
- the yoke 6 and the magnet 7 form a fixed portion with respect to the lens frame unit 3a which is a movable body.
- the imaging device 50 is in a posture to photograph a subject on the ground side (the direction of gravity G).
- the force applied to the lens frame 3 is the magnetic spring force F, lens
- the reference position of the lens frame 3 on the solid-state imaging device 91 side is determined by the contact between the bottom surface 33a of the lens frame 3 and the bottom 63 of the yoke 6.
- a surface that contacts the bottom surface 33a of the lens frame 3 at the bottom 63 of the yoke 6 is defined as a reference surface D.
- the imaging device 50 is in a posture to photograph a subject on the ground side (gravity G direction).
- the lens frame 3 is in contact with the reference plane D (the bottom 63 of the yoke 6) on the solid-state imaging device 91 side.
- F (b) is the magnetic spring force that prevents the lens frame 3 from separating the reference surface D force, that is, to create a gap between the bottom surface 33a of the lens frame 3 and the reference surface D.
- the magnetic spring force F (a) required to bring the frame 3 into contact with the reference plane D is
- the imaging device 50 is in a posture to photograph a subject opposite to the ground (that is, vertically above), and the lens frame 3 is in contact with the reference plane D (bottom 63 of the yoke 6). It is in. In this state, a current F is applied to the coil 5, and the thrust F required to move the lens frame 3 toward the subject is
- the thrust F is set to be small in order to reduce the magnet 7 and the coil 5. There is a need to.
- the magnet 7 and the coil 5 are reduced in size.
- the imaging device 50 is activated and a preview (displays the captured image on the display unit). At the start of shooting or recording (recording the captured image).
- FIG. 17 shows an operation in which a current is passed through the coil 5 and the lens frame unit 3a is moved when the imaging device 50 is activated.
- a current flows in the coil 5 in the reverse direction for a certain period of time.
- the “reverse direction” refers to the direction of current when generating an electromagnetic force that moves the lens frame 3 toward the bottom 63 of the yoke 6.
- the lens frame 3 abuts on the reference plane D and is held there.
- FIG. 18 shows an operation of moving the lens frame unit 3a before starting shooting immediately after the imaging device 50 is activated.
- the shooting start button is pressed (turned ON)
- a current is passed through the coil 5 in the reverse direction for a certain period of time.
- the lens frame 3 comes into contact with the reference plane D and is held there.
- the autofocus operation described in the first embodiment is performed.
- the image is in focus, recording of the captured image starts.
- the lens frame 3 it is possible to hold the lens frame 3 without separating the reference plane D (the bottom 63 of the yoke 6) force at the time of previewing or starting of shooting. In both cases, the magnetic spring force F can be reduced. As a result, the lens drive unit is small
- the imaging device 50 can be further downsized.
- a current is passed through the coil 5 to move the lens frame 3 in the optical axis direction, and a frictional force F generated between the guide shaft 4 and the lens frame 3 is generated. Is changed from static friction to dynamic friction to reduce the frictional force F and the magnetic spring force F
- FIG. 19 is a cross-sectional view for explaining the structure and operation of imaging apparatus 60 according to Embodiment 6 of the present invention.
- the components described in the first embodiment (FIGS. 1 to 5)
- symbol is attached
- 20 and 21 are timing charts showing the operation of the imaging device 60.
- the frictional force F can be reduced by moving the lens frame 3 (that is, a dynamic frictional force is generated instead of a static frictional force).
- the frictional force F is also reduced by moving the lens frame 3 in one direction along the optical axis.
- Magnetic spring force F satisfies the following formula (6)
- the magnetic spring force F can be reduced by setting so that the lens drive
- the moving device can be downsized, and the imaging device 60 can be downsized.
- FIG. 20 shows the operation of causing the lens frame unit 3a to reciprocate in the direction of the optical axis by intermittently passing a current through the coil 5 when the imaging device 60 is started.
- a positive current is intermittently supplied to the coil 5. While the current in the positive direction flows through the coil 5, the lens frame 3 moves to the subject side by the thrust F. While no current flows through the coil 5, the lens frame 3 moves to the opposite side of the subject side (toward the bottom 63 of the yoke 6) by the magnetic spring force F.
- Lens frame 3 is
- the frictional force generated between the guide shaft 4 and the guide shaft 4 is the dynamic frictional force F (b).
- the lens frame 3 is attached to the bottom 63 (base) of the yoke 6.
- the preview screen is displayed.
- FIG. 21 shows a case where the lens frame unit 3a is operated before recording of a captured image is started.
- the shooting start button is pressed (turned on)
- a positive current is intermittently applied to coil 5 Washed away.
- Lens frame 3 moves
- the lens frame 3 is attached to the bottom 63 of the yoke 6 (standard
- the energization direction to the coil 5 is not limited to the forward direction, and may be the reverse direction. Further, instead of turning on / off the energization of the coil 5, the direction of the current flowing through the coil 5 may be switched between the forward direction and the reverse direction.
- the lens driving device can be downsized, and the imaging device 50 can be downsized.
- the yoke 6 is not limited to the imaging device in which the yoke 6 can move in the optical axis direction, and the yoke 6 is fixed to a fixed portion (for example, the housing 11 of the imaging device). Apply it to the imaging device.
- a mopile device such as a mobile phone having an imaging function is described as an example of an imaging device equipped with an imaging device.
- the lens driving according to Embodiments 1 to 6 is described.
- the device and the imaging device can be mounted on an imaging device such as a digital still camera.
- a magnetic spring using the magnetic piece 8 is used to bias the lens frame 3 toward the solid-state imaging device 91, but the subject side of the lens frame 3 or It is also possible to provide a biasing force to the lens frame 3 by providing a coil spring, a leaf spring or the like on the imaging element side.
- a pair of leaf springs 17 is provided on the subject side of the lens frame 3. This The leaf spring 17 is in contact with a contact portion (not shown) formed on the yoke 6 (FIG. 1 and the like) to urge the lens frame 3 toward the image sensor. Since the leaf spring 17 shown in FIG. 22 also functions as a power supply means for the coil 5, the force fixed to the coil 5 by the solder 18 is not limited to such a configuration.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
- Shutters For Cameras (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004303197 | 2004-10-18 | ||
JP2004-303197 | 2004-10-18 | ||
JP2005090817A JP3765825B1 (ja) | 2004-10-18 | 2005-03-28 | レンズ駆動装置、撮像装置、撮像機器及びレンズ位置の調整方法 |
JP2005-090817 | 2005-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006043358A1 true WO2006043358A1 (ja) | 2006-04-27 |
Family
ID=36202782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/013691 WO2006043358A1 (ja) | 2004-10-18 | 2005-07-27 | レンズ駆動装置、撮像装置、撮像機器、レンズ位置の調整方法及びレンズ駆動方法 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP3765825B1 (ja) |
KR (1) | KR100847980B1 (ja) |
TW (1) | TWI269900B (ja) |
WO (1) | WO2006043358A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009116310A1 (ja) | 2008-03-21 | 2009-09-24 | ソニー株式会社 | カメラモジュール |
CN110058377A (zh) * | 2018-01-19 | 2019-07-26 | 新思考电机有限公司 | 透镜驱动装置、摄像装置以及电子设备 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012113186A (ja) * | 2010-11-26 | 2012-06-14 | Mitsumi Electric Co Ltd | カメラモジュール |
TWI505015B (zh) * | 2013-06-27 | 2015-10-21 | Sintai Optical Shenzhen Co Ltd | 鏡頭 |
TWI631409B (zh) * | 2016-10-21 | 2018-08-01 | 揚明光學股份有限公司 | 光路調整機構與光學機構 |
CN117250717A (zh) * | 2016-09-30 | 2023-12-19 | 扬明光学股份有限公司 | 光路调整机构与光学机构 |
JP7304519B2 (ja) * | 2018-10-12 | 2023-07-07 | パナソニックIpマネジメント株式会社 | レンズ鏡筒 |
JPWO2022138573A1 (ja) * | 2020-12-25 | 2022-06-30 | ||
JPWO2022138542A1 (ja) * | 2020-12-25 | 2022-06-30 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59149117U (ja) * | 1983-03-24 | 1984-10-05 | 富士写真フイルム株式会社 | カメラのレンズ駆動装置 |
JPH0833385A (ja) * | 1994-07-12 | 1996-02-02 | Olympus Optical Co Ltd | ボイスコイルモータの制御装置 |
JPH08248295A (ja) * | 1995-03-09 | 1996-09-27 | Sony Corp | レンズ鏡筒 |
JP2002214504A (ja) * | 2001-01-19 | 2002-07-31 | Canon Inc | 光学装置および撮影装置 |
JP2004171012A (ja) * | 2004-01-05 | 2004-06-17 | Canon Inc | 撮像装置、及びその制御方法 |
-
2005
- 2005-03-28 JP JP2005090817A patent/JP3765825B1/ja not_active Expired - Fee Related
- 2005-07-27 KR KR1020077008707A patent/KR100847980B1/ko not_active IP Right Cessation
- 2005-07-27 WO PCT/JP2005/013691 patent/WO2006043358A1/ja active Application Filing
- 2005-08-03 TW TW094126303A patent/TWI269900B/zh active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59149117U (ja) * | 1983-03-24 | 1984-10-05 | 富士写真フイルム株式会社 | カメラのレンズ駆動装置 |
JPH0833385A (ja) * | 1994-07-12 | 1996-02-02 | Olympus Optical Co Ltd | ボイスコイルモータの制御装置 |
JPH08248295A (ja) * | 1995-03-09 | 1996-09-27 | Sony Corp | レンズ鏡筒 |
JP2002214504A (ja) * | 2001-01-19 | 2002-07-31 | Canon Inc | 光学装置および撮影装置 |
JP2004171012A (ja) * | 2004-01-05 | 2004-06-17 | Canon Inc | 撮像装置、及びその制御方法 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009116310A1 (ja) | 2008-03-21 | 2009-09-24 | ソニー株式会社 | カメラモジュール |
EP2256547A1 (en) * | 2008-03-21 | 2010-12-01 | Sony Corporation | Camera module |
EP2256547A4 (en) * | 2008-03-21 | 2011-08-31 | Sony Corp | CAMERA MODULE |
US8692931B2 (en) | 2008-03-21 | 2014-04-08 | Sony Corporation | Camera module |
CN110058377A (zh) * | 2018-01-19 | 2019-07-26 | 新思考电机有限公司 | 透镜驱动装置、摄像装置以及电子设备 |
CN110058377B (zh) * | 2018-01-19 | 2024-04-09 | 新思考电机有限公司 | 透镜驱动装置、摄像装置以及电子设备 |
Also Published As
Publication number | Publication date |
---|---|
TW200613794A (en) | 2006-05-01 |
JP2006146133A (ja) | 2006-06-08 |
KR20070044509A (ko) | 2007-04-27 |
KR100847980B1 (ko) | 2008-07-22 |
JP3765825B1 (ja) | 2006-04-12 |
TWI269900B (en) | 2007-01-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3765825B1 (ja) | レンズ駆動装置、撮像装置、撮像機器及びレンズ位置の調整方法 | |
JP4517297B2 (ja) | レンズユニット及び撮像装置 | |
JP6605255B2 (ja) | レンズユニット、カメラ、電子機器、レンズユニット組立方法、カメラの製造方法および電子機器の製造方法 | |
JP5292334B2 (ja) | レンズ鏡筒および撮像装置 | |
KR20070042080A (ko) | 렌즈 유닛 및 촬상 장치 | |
KR101504350B1 (ko) | 카메라 렌즈 모듈 | |
KR20060092067A (ko) | 렌즈유닛 및 촬상장치 | |
TW200947008A (en) | Camera module | |
JP4702612B2 (ja) | 撮像装置 | |
JP2007108434A (ja) | レンズ・シャッタ結合ユニット | |
JP2008233385A (ja) | ぶれ防止装置、レンズ鏡筒および光学機器 | |
US7995287B2 (en) | Lens barrel and imaging apparatus | |
JP2007108595A (ja) | レンズユニット及び撮像装置 | |
JP4687972B2 (ja) | レンズユニット及び撮像装置 | |
KR100746714B1 (ko) | 정보통신기기용 소형 카메라장치 | |
CN111107268B (zh) | 带手抖校正功能的摄像装置 | |
JP2006146255A (ja) | 撮像装置及びレンズ駆動方法 | |
JP3916628B2 (ja) | レンズ駆動装置及び撮像装置 | |
KR20100124135A (ko) | 이미지 촬상 장치용 렌즈 액츄에이터 | |
JP2017151312A (ja) | レンズ鏡筒、レンズユニット及びレンズユニットの製造方法 | |
KR100562720B1 (ko) | 통신기기용 소형 카메라장치 및 그를 구비한 통신기기 | |
TWI458226B (zh) | 電磁驅動裝置之抑制移動時傾斜的結構 | |
JP4423089B2 (ja) | 光量調節装置および光学機器 | |
JP4527051B2 (ja) | レンズ駆動装置及び撮像装置 | |
KR20100068701A (ko) | 렌즈 액츄에이터용 탄성 부재 및 이를 포함하는 렌즈 액츄에이터 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1020077008707 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 05766985 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: JP |