WO2006025161A1 - レンズ駆動装置、撮像装置及び撮像装置のレンズ位置調整方法 - Google Patents
レンズ駆動装置、撮像装置及び撮像装置のレンズ位置調整方法 Download PDFInfo
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- WO2006025161A1 WO2006025161A1 PCT/JP2005/013234 JP2005013234W WO2006025161A1 WO 2006025161 A1 WO2006025161 A1 WO 2006025161A1 JP 2005013234 W JP2005013234 W JP 2005013234W WO 2006025161 A1 WO2006025161 A1 WO 2006025161A1
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- WIPO (PCT)
- Prior art keywords
- lens
- coil
- lens frame
- magnet
- driving device
- Prior art date
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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
- G03B5/04—Vertical adjustment of lens; Rising fronts
-
- 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
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- 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
- 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
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
-
- 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
-
- 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
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
- G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils
Definitions
- the present invention relates to a lens driving device, an imaging device, and a lens position adjusting method for the imaging device.
- the present invention relates to a lens driving device for moving a lens along an optical axis, an imaging device using the same, and a lens position adjusting method thereof.
- a so-called voice coil motor in which a coil is arranged in a magnetic circuit having a magnet or a yoke force is used instead of a DC motor or the like.
- a coil is wound around the lens frame and a magnet and a yoke are arranged in the fixed part.
- Patent Documents 1, 2, and 3 Specifically, a coil wound around the entire circumference of the lens frame (for example, see Patent Document 1), or a coil wound around a projection provided on the lens frame (for example, Patent Document 1) 2 and 3) have been proposed.
- Patent Document 1 Japanese Patent Laid-Open No. 6-201975 (Page 3-4, Fig. 10-12)
- Patent Document 2 JP 2000-137156 A (Page 4, Fig. 2)
- Patent Document 3 Japanese Patent Laid-Open No. 2002-350716 (Page 4, Fig. 3)
- Patent Document 4 Japanese Unexamined Patent Publication No. 2000-321475 (Page 3, Fig. 2)
- Patent Document 5 JP-A-62-88147 (Page 3, Figure 5)
- a display unit such as a liquid crystal display and a camera (imaging device) are generally arranged adjacent to each other. It is required to make the length in the direction in which the display unit and the camera are adjacent (for example, the vertical direction) as short as possible.
- a coil is wound around the entire circumference of the lens frame, and a magnet or a yoke is disposed so as to face the coil.
- a magnet or a yoke is disposed so as to face the coil.
- Patent Documents 2 and 3 even when a coil is wound around a projection or the like of a lens frame, a space for accommodating a flexible printed board for energizing the coil is provided. Since it must be provided around the lens frame, there is still a problem that the lens drive device becomes large.
- Patent Document 5 when a guide shaft that guides the lens frame in the optical axis direction is used as a yoke of a magnetic circuit, a coil is disposed so as to surround the guide shaft.
- the distance between the guide shaft and the lens must be kept relatively long, and the length of the lens frame in the longitudinal direction becomes large. There is.
- the present invention has been made to solve the above-described problems, and an object thereof is to reduce the size and weight of the lens driving device.
- the lens driving device has a first lens and an outer diameter larger than that of the first lens.
- a lens group including a second lens, a lens frame that holds the lens group, the lens frame having a guide hole formed substantially parallel to an optical axis direction of the lens group, and the guide
- a fixed portion including a guide shaft that slidably engages with the hole and guides the lens frame in the optical axis direction, a coil fixed to the lens frame so as to surround the guide shaft, and the fixed member.
- the fixed portion includes a magnet fixed so as to sandwich the coil between the guide shaft and a yoke that constitutes a part of a magnetic circuit including the magnet together with the guide shaft.
- the coil is arranged so as to be adjacent to a portion holding the first lens.
- the coil is wound around the guide shaft, and the coil is disposed so as to be adjacent to the portion holding the first lens having a small diameter in the lens frame. Even if the distance from the guide shaft is shortened, interference between the lens and the coil can be avoided, and as a result, the size of the lens driving device can be reduced. That is, the lens drive device can be reduced in size and weight.
- FIG. 1 is a plan view of a lens driving apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a side sectional view of the lens driving apparatus according to Embodiment 1 of the present invention.
- 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 side sectional view of a lens driving device according to Embodiment 2 of the present invention.
- FIG. 7 is a perspective view of a lens driving device according to Embodiment 2 of the present invention.
- FIG. 8 is a perspective view of a lens driving device according to a modification of Embodiment 2 of the present invention.
- FIG. 9 is a side sectional view of a lens driving apparatus according to Embodiment 3 of the present invention.
- FIG. 10 is a perspective view of a lens driving device according to Embodiment 3 of the present invention.
- FIG. 11 is a rear view of a lens driving device according to Embodiment 4 of the present invention.
- FIG. 1 is a plan view showing a lens driving device 10 according to Embodiment 1 of the present invention.
- FIG. 2 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) of a single focus lens in an imaging device (for example, a small camera mounted on a mobile phone). Specifically, the lens driving device 10 moves the lenses 2a and 2b (FIG. 2) along the optical axis A to form a subject image on the solid-state imaging device 91 (FIG. 2).
- the direction of the optical axis A (FIG. 2) of the lenses 2a and 2b is the Z direction, and one direction in the plane orthogonal to the optical axis A (the left-right direction in FIGS. 1 and 2) Is the Y direction.
- the direction orthogonal to the Y direction in the plane orthogonal to the optical axis A is defined as the X direction.
- the direction of force on the subject is upward (ie, + Z direction), and the direction of force on the solid-state image sensor 91 is downward (ie, -Z direction).
- the outer diameter of the upper lens 2a (referred to as the small diameter lens 2a) is smaller than the outer diameter of the lower lens 2b (referred to as the large diameter lens 2b).
- the lens driving device 10 has a lens frame 3 that holds the lenses 2a and 2b.
- the lens frame 3 has substantially ring-shaped frame portions 31 and 32 that hold the lenses 2a and 2b, respectively.
- the outer diameter of the large-diameter frame portion 32 that holds the large-diameter lens 2b is larger than the outer diameter of the small-diameter frame portion 31 that holds the small-diameter lens 2a.
- the frame portions 31 and 32 are formed so as to overlap in the direction of the optical axis A so that their centers coincide with the optical axis A.
- the lens frame 3 has a support portion 33 that is integrally formed so as to be adjacent to the frame portions 31 and 32 in the Y direction (radial direction of the lenses 2a and 2b).
- This support 33 is long in the Y direction. It has a shape.
- a guide hole 35 passes through the support portion 33 of the lens frame 3 in the Z direction, and the guide shaft 4 passes through the guide hole 35 so as to be slidable. The lower end of the guide shaft 4 is fitted in the hole of the yoke 6 fixed to the housing 11 of the imaging device.
- the lens frame 3 By sliding between the guide shaft 4 and the guide hole 35, the lens frame 3 can move in the Z direction along the guide shaft 4.
- stoppers (not shown) are provided at the positions where the lens frame 3 contacts when the movement limit in the + Z direction and the movement limit in the Z direction are reached. It has been.
- 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.
- the guide shaft 4 may be fitted to the yoke 6 as long as the magnetic lines of force of the magnet 7 can be passed.
- a coil holding portion 34 is formed above the support portion 33 of the lens frame 3 so as to be adjacent to the small diameter frame portion 31 holding the small diameter lens 2a in the Y direction.
- a coil 5 is wound around the coil holding portion 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 configuration described in the second embodiment to be described later may be used, or another configuration may be used.
- FIG. 3 is a perspective view showing a part of the lens driving device 10 shown in FIG.
- 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 by bending a plate-like member into a U-shape, and includes a bottom portion 63 to which the lower end of the above-described guide shaft 4 is fixed, and a wall extending upward from both ends of the bottom portion 63 in the X direction.
- Magnets 7 are attached to the inner surfaces of the walls 61 and 62 so as to sandwich the coil 5 in the X direction. Each magnet 7 faces the side of the coil 5 that extends in the Y direction.
- the above-described solid-state imaging device 91 is fixed to the housing 11 by the package being bonded to the housing 11 with an adhesive or the like.
- a circuit board 92 is fixed and electrically connected to the solid-state image sensor 91. Note that both the solid-state image sensor 91 and the circuit board 92 may be fixed to the casing 11 with an adhesive! Alternatively, only the circuit board 92 may be fixed to the casing 11 with an adhesive, and the solid-state image sensor 91 may be indirectly fixed to the casing 11.
- 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. This magnetic piece 8 is arranged so that it is always located on the + Z side (that is, the subject side) of the center position of the magnet 7 in the Z direction when the lens frame 3 is in the movable range in the Z direction. .
- 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 the center position in the Z direction of the magnet 7 (that is, the position having the highest magnetic flux density).
- the movable range of the lens frame 3 is determined so that the magnetic piece 8 is always located on the + Z direction side (subject side) from the center of the magnet 7 in the Z direction.
- the urging force is acting.
- 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 magnet 7 overlaps a part of the large-diameter frame portion 32 (indicated by reference numeral 32a) that holds the large-diameter lens 2b.
- a gap C slightly larger than the moving amount 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 Even if moves in the Z direction, it does not touch the magnet 7.
- the effect of the first embodiment will be described.
- the coil 5 is wound around the entire circumference of the large-diameter frame portion 32 or the small-diameter frame portion 31, the magnet 7 must be arranged so as to face the coil 5.
- the dimensions will increase.
- the coil 5 is wound around the coil holding portion 34 adjacent to the small-diameter frame portion 31, and thus the magnet 7 is made large. It is possible to dispose the inner portion in the X direction with respect to the outer diameter of the diameter frame portion 32. As a result, the X direction dimension of the lens driving device 10 can be reduced. That is, the lens driving device 10 can be reduced in size and weight.
- the coil holding portion 34 is formed adjacent to the small diameter frame portion 31, it is compared with the case where the coil holding portion 34 is formed adjacent to the large diameter frame portion 32.
- the coil 5 can be arranged at a position close to the optical axis A.
- the coil 5 can be disposed at a position closer to the optical axis A. As a result, the size of the lens driving device 10 in the Y direction can be further reduced.
- the pair of magnets 7 are arranged so as to sandwich the coil 5 in the X direction, the shape of the lens driving device 10 in the Y direction can be further reduced.
- the magnetic piece 8 attached to the lens frame 3 can obtain a restoring force for returning the lens frame 3 to a predetermined position (a movement limit in one Z direction) when no power is supplied, it is necessary to provide a panel or the like. It is possible to further reduce the size of the lens driving device 10 that is essential. Since the light weight coil is arranged on the lens frame 3 on the movable side, it is possible to reduce the weight of the lens frame 3 and drive the lens frame 3 with a small current.
- the voice coil motor components coil, yokes, magnets, etc.
- the size around the lenses 2a and 2b can be reduced.
- the difference in drive current due to the posture difference during shooting is reduced, and the guide shaft 4 and the guide hole 35 Since the frictional force is also reduced, it becomes possible to drive the lenses 2a and 2b with a smaller driving power.
- the guide shaft 4 is used as a part of the magnetic circuit, for example, a projection is provided on the yoke 6 (in addition to the guide shaft 4), and the lens frame 3
- the lens frame 3 can be further reduced in size as compared with the case where a hole for inserting the protrusion is formed.
- FIG. 6 is a YZ sectional view showing the lens driving device 20 according to the second embodiment of the present invention.
- FIG. 7 is a perspective view showing the lens driving device 20 shown in FIG. 6 with a part cut away. 6 and 7, the same components as those described in Embodiment 1 (FIGS. 1 to 5) are denoted by the same reference numerals.
- the second embodiment is characterized by the configuration of the lead 12 for supplying current to the coil 5.
- the lead 12 is, for example, a plate-like member, and includes a side portion 12d extending downward along the side surface of the coil 5 (surface opposite to the lens 2a, 2b side) and the side surface of the support portion 33.
- the lower end force of the side portion 12d is also bent at the lower side of the lens frame 3 (toward the inside of the coil 5), and the folded portion 12b folded back in a substantially V shape at the end of the folded portion 12c. have.
- the upper end 13 (Fig. 7) of the side portion 12d is connected to the wire 15 of the coil 5 by a conductive method such as soldering.
- the bent portion 12c the lower end of the side portion 12d extending in the Z direction is also bent toward the inner side of the coil 5 by force.
- the bent portion 12c extends substantially in the Y direction toward the large-diameter frame portion 32, and the tip thereof reaches the vicinity of the large-diameter frame portion 32.
- the folded portion 12b is folded downward at the tip of the folded portion 12c so as to draw a V shape in the YZ plane.
- the bent part 12c and the folded part 12b are provided between the bottom part 63 of the yoke 6 and the support part 33.
- the folded portion 12b further protrudes through the hole 1 lb of the housing 11 that is longer than the folded portion 12c, and is fixed to the housing 11 with an adhesive 1 la or the like.
- the front end portion 12a of the folded portion 12b is bent downward and is connected to a terminal (external terminal) of the circuit board 92 through a solder 92a or the like or in a conductive manner such as being attached to a connector.
- the bent portion 12c and the folded portion 12b may be provided on the upper side of the lens frame 3 provided on the lower side of the lens frame 3.
- the lead 12 is not necessarily fixed to the housing 11, but a part of the lead 12 is fixed to a component fixed to the imaging apparatus (that is, a movable part such as the lens frame 3). And prefer to be.
- the lens driving device 20 since the lead 12 has the bent portion 12c and the folded portion 12b, when the lens frame 3 moves in the Z direction, the bent portion 12c.
- the bending angle of the V-shape between the lens and the folded portion 12b changes due to elastic deformation, so that the movement of the lens frame 3 can be followed. Thereby, it is possible to ensure electrical connection between the coil 5 and the circuit board 92 while allowing the lens frame 3 to move in the Z direction.
- the coil 5 and the lead 12 are assembled as one part by winding the wire 15 of the coil 5 around the frame member and fixing the lead 12 to the wire 15 by soldering or the like. (Partial assembly) is possible, and assemblability is improved.
- the lens driving device 10 Since the side portion 12d extends in the Z direction along the side surface of the coil 5, and the bent portion 12c and the folded portion 12b are located above or below the lens frame 3, the lens driving device There is no need to increase the 10 Y or X dimension. That is, the lens driving device 10 can be reduced in size and weight, and the problem that it is difficult to store the lead 12 (see Patent Document 4) can be solved.
- the tip 12a of the lead 12 is bent from the folded portion 12b to the circuit board 92 side. Therefore, the lead 12 can be directly soldered to the circuit board 92. As a result, the number of wiring components can be reduced. As a result, the fixing strength to the circuit board 92 can be improved by increasing the width of the lead 12 from the housing 11 to the circuit board 92.
- the lead 12 is a plate-like member, but is not limited to a plate-like member.
- a wire may be used.
- an insulation coating may be applied to the lead 12, or an insulating sheet or the like may be provided on the surface of the yoke 6 and the magnetic piece 8. .
- the bent portion 12c and the folded portion 12b are formed so as to draw a V-shape in the YZ plane.
- a part may be bent toward the inner side of the coil 5 on the upper side or the lower side of the lens frame 3.
- the bent portion 12c and the folded portion 12b may be formed so as to draw a U-shape in a plane slightly inclined from the XY plane.
- the bent portion 12c and the folded portion 12b are not only spaced apart in the X direction but also separated in the Z direction as indicated by an arrow H in the figure.
- FIG. 9 is a YZ sectional view showing the lens driving device 30 according to Embodiment 3 of the present invention.
- FIG. 10 is a perspective view showing a movable part of the lens driving device 30 shown in FIG. 9 and 10, the same components as those described in the first embodiment (FIGS. 1 to 5) and the second embodiment (FIGS. 6 to 8) are denoted by the same reference numerals.
- the third embodiment is characterized by the configuration of the lead 17 for supplying current to the coil 5.
- a lead 17 force for supplying current to the coil 5 is provided on the + Z direction side (subject side) of the lens frame 3. Energized in the Z direction. Since the lens frame 3 is urged in the Z direction using the lead 7, the magnetic piece 8 (FIG. 2, etc.) is not used in the third embodiment.
- the lead 17 is formed of, for example, a spring material and extends substantially upward along the side surface of the coil 5.
- the lower end 13 of the side portion 17c is connected to the coil 5 by a conductive method such as soldering.
- the bent portion 17b is also bent with the upper end force of the side portion 17c extending in the Z direction directed toward the inside of the coil 5.
- the bent portion 17b extends substantially in the Y direction toward the small-diameter frame portion 31, and the tip thereof reaches the vicinity of the small-diameter frame portion 31.
- the folded portion 17a is folded upward at the tip of the folded portion 17b so as to draw a V shape in the YZ plane.
- the folded portion 17a further protrudes through the hole l ib of the housing 11 that is longer than the folded portion 17b.
- the tip of the folded portion 17a is fixed to a terminal portion (external terminal) of the circuit board 92 via a connection portion (not shown).
- the V-shaped bending angle between the folded portion 17b and the folded portion 17a is narrowed in the space between the upper wall 11c of the housing 11 and the upper surface of the lens frame 3.
- the lead 17 tries to be elastically deformed so that the V-shaped bending angle between the bent portion 17b and the folded portion 17a is widened, and this inertia force urges the lens frame 3 in the ⁇ Z direction. ing.
- the lens frame 3 When no current flows through the coil 5, the lens frame 3 is at the movement limit in the -Z direction (ie, abuts against a stopper in one Z direction) due to the urging force of the lead 17.
- a current is passed through the coil 5, as described in Embodiment 1, an electromagnetic force in the + Z direction is generated by the current in the coil 5 and the magnetic field generated by the magnet 7.
- the lens frame 3 moves in the + Z direction to a position where the electromagnetic force in the + Z direction and the biasing force in the Z direction due to the elasticity of the lead 17 are balanced, and the subject image is formed on the solid-state image sensor 91.
- the lens frame 3 returns to the movement limit in the Z direction by the biasing force of the lead 17 in the ⁇ Z direction.
- the lens driving device 30 since the urging force of the lens frame 3 is generated by utilizing the elasticity of the lead 17, the magnetic piece 8 (FIG. 2 etc. ) Becomes unnecessary. Therefore, in addition to the effects of the second embodiment described above, the number of parts can be reduced and the image pickup apparatus can be further miniaturized.
- FIG. 11 is a rear view of the lens driving device 40 according to Embodiment 4 of the present invention when viewed in the Y direction. It is.
- the same components as those described in Embodiment 1 (FIGS. 1 to 5) are denoted by the same reference numerals.
- the relative position of the lenses 2a and 2b with respect to the solid-state image sensor 91 is adjusted by adjusting the position of the magnet 7 in the Z direction in the assembling process of the imaging device or the like. .
- the lens frame 3 is arranged so that the magnetic piece 8 is always on the + Z side with respect to the center of the magnet 7 in the Z direction.
- a movable range was defined.
- the lens frame 3 can be moved so that the magnetic piece 8 can be positioned on both the + Z side and the Z side of the center of the magnet 7 in the Z direction.
- a range of performance is defined.
- the magnetic piece 8 Since the magnetic piece 8 is urged toward the center in the Z direction of the magnet 7 having the highest magnetic flux density, the magnetic piece 8 is most stable in a state at the center C (assumed to be a stable position) C. That is, when no current flows through the coil 5, the lens frame 3 is stationary with the magnetic piece 8 in the stable position C. When the magnetic piece 8 moves in the + Z direction from the stable position C, the magnetic piece 8 receives a biasing force in the ⁇ Z direction from the magnet 7 according to the amount of movement. Further, when the magnetic piece 8 moves in the ⁇ Z direction from the stable position C, the magnetic piece 8 receives a force in the + Z direction from the magnet 7 according to the movement amount. Therefore, by adjusting the position of the magnet 7 in the Z direction (that is, changing the stable position C), the entire movement range of the lens frame 3 can be moved in the + Z direction or the Z direction.
- the magnet 7 Adjust the Z position. By this adjustment, even if there is a manufacturing error of the lenses 2a and 2b and the solid-state image sensor 91, the focal planes of the lenses 2a and 2b can be made to exactly match the image plane of the solid-state image sensor 91. Further, even when the depth of focus becomes strict as the solid-state image sensor 91 is downsized, it can be dealt with.
- the pair of magnets 7 are fixed (temporarily fixed) to the wall portions 61 and 62 of the yoke 6 using a magnetic attractive force.
- the magnet 7 is moved in the Z direction using the adjustment jig 18 while measuring the position of the focal plane of the lenses 2a and 2b.
- magnet 7 is magnetically attracted to walls 61 and 62 of yoke 6.
- the magnet 7 is moved along the walls 61 and 62 so as to be shifted in the Z direction.
- the focal planes of the lenses 2a and 2b are exactly coincident with the imaging plane of the solid-state imaging device 91, the magnet 7 is fixed to the walls 61 and 62 with an adhesive (main fixing).
- the adhesive may be applied so as to surround a surface fixed to the wall portions 61 and 62 of each magnet 7, or may be injected between the magnet 7 and the wall portions 61 and 62.
- a groove for pouring the adhesive may be formed in the wall portions 61 and 62.
- adjustment of the relative position (focus adjustment) of the lenses 2a and 2b with respect to the solid-state imaging device 91 is performed by adjusting the position of the magnet 7 in the Z direction. Therefore, it is not necessary to provide the lens frame 3 with a focus adjusting screw or a ring cam, and as a result, the lens driving device 40 can be further downsized.
- the adjusting jig 18 described above may be mounted on a force imaging apparatus that is prepared separately from the imaging apparatus.
- the number of force lenses using the two lenses 2a and 2b is not limited to two, and may be three or more.
- the coil 5 is disposed adjacent to a portion of the lens frame 3 that holds a lens other than the lens with the largest diameter, the above-described lens driving device can be reduced in size and effect.
- Embodiments 1 to 4 described above two magnets 7 are provided on both sides of the coil 5 in the X direction.
- the number of magnets 7 is not limited to two, and one magnet 1 is provided on one side of the coil 5. You may have only one.
- the configuration in which the lead 12 is bent or curved on one side in the Z direction with respect to the lens frame 3 is the lens driving device described in the first embodiment (The force applied to the coil holding part 34 adjacent to the small-diameter frame part 31 of the lens frame 3) may be applied to other lens driving devices.
- the adjustment method by adjusting the position of the magnet 7 in the Z direction is applied to the lens driving device described in the first embodiment.
- the present invention may be applied to the lens driving device described above.
- the adjustment method may be applied to lens driving devices other than Embodiments 1 and 2.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004251688A JP3916628B2 (ja) | 2004-08-31 | 2004-08-31 | レンズ駆動装置及び撮像装置 |
JP2004-251688 | 2004-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006025161A1 true WO2006025161A1 (ja) | 2006-03-09 |
Family
ID=35999824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/013234 WO2006025161A1 (ja) | 2004-08-31 | 2005-07-19 | レンズ駆動装置、撮像装置及び撮像装置のレンズ位置調整方法 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP3916628B2 (ja) |
KR (2) | KR100899063B1 (ja) |
TW (1) | TWI281052B (ja) |
WO (1) | WO2006025161A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2169439A1 (en) * | 2008-09-29 | 2010-03-31 | Sony Corporation | Lens driver, camera module, imaging apparatus, and camera-equipped mobile terminal |
US20220086315A1 (en) * | 2020-09-16 | 2022-03-17 | Samsung Electro-Mechanics Co., Ltd. | Camera module |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007094364A (ja) * | 2005-09-02 | 2007-04-12 | Nidec Sankyo Corp | レンズ駆動装置 |
US8009371B2 (en) | 2005-09-02 | 2011-08-30 | Nidec Sankyo Corporation | Lens driving apparatus |
JP5083557B2 (ja) * | 2008-05-26 | 2012-11-28 | ミツミ電機株式会社 | レンズ駆動装置 |
JP5669300B2 (ja) * | 2010-08-18 | 2015-02-12 | 新シコー科技株式会社 | レンズ駆動装置、オートフォーカスカメラ及びカメラ付きモバイル端末装置 |
CN102508393B (zh) * | 2011-11-22 | 2014-05-28 | 吴江市博众精工科技有限公司 | 一种平照相机机构调整模组 |
CN102508394B (zh) * | 2011-11-22 | 2014-06-18 | 吴江市博众精工科技有限公司 | 一种能调整好检测工具位置的调整模组 |
JP6942547B2 (ja) * | 2017-07-13 | 2021-09-29 | 日本電産サンキョー株式会社 | 振れ補正機能付き光学ユニットの揺動体姿勢調整方法および振れ補正機能付き光学ユニット |
Citations (5)
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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 |
JPH0493907A (ja) * | 1990-08-06 | 1992-03-26 | Matsushita Electric Ind Co Ltd | レンズ駆動装置 |
JPH0829668A (ja) * | 1994-07-18 | 1996-02-02 | Olympus Optical Co Ltd | 光学素子移動装置 |
JPH1172693A (ja) * | 1997-08-29 | 1999-03-16 | Canon Inc | カメラのレンズ駆動装置 |
JP2003075708A (ja) * | 2001-09-07 | 2003-03-12 | Sony Corp | 撮像装置用のレンズ装置および該レンズ装置に使用されるフレキシブルプリント配線板 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60142824U (ja) * | 1984-03-01 | 1985-09-21 | セイコーインスツルメンツ株式会社 | 光ピツクアツプ |
JPS6288147A (ja) * | 1985-10-14 | 1987-04-22 | Mitsubishi Electric Corp | 光学手段駆動装置 |
-
2004
- 2004-08-31 JP JP2004251688A patent/JP3916628B2/ja not_active Expired - Fee Related
-
2005
- 2005-07-19 WO PCT/JP2005/013234 patent/WO2006025161A1/ja active Application Filing
- 2005-07-19 KR KR1020087007163A patent/KR100899063B1/ko not_active IP Right Cessation
- 2005-07-19 KR KR1020077004825A patent/KR100849306B1/ko not_active IP Right Cessation
- 2005-08-03 TW TW094126302A patent/TWI281052B/zh not_active IP Right Cessation
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 |
JPH0493907A (ja) * | 1990-08-06 | 1992-03-26 | Matsushita Electric Ind Co Ltd | レンズ駆動装置 |
JPH0829668A (ja) * | 1994-07-18 | 1996-02-02 | Olympus Optical Co Ltd | 光学素子移動装置 |
JPH1172693A (ja) * | 1997-08-29 | 1999-03-16 | Canon Inc | カメラのレンズ駆動装置 |
JP2003075708A (ja) * | 2001-09-07 | 2003-03-12 | Sony Corp | 撮像装置用のレンズ装置および該レンズ装置に使用されるフレキシブルプリント配線板 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2169439A1 (en) * | 2008-09-29 | 2010-03-31 | Sony Corporation | Lens driver, camera module, imaging apparatus, and camera-equipped mobile terminal |
US8228420B2 (en) | 2008-09-29 | 2012-07-24 | Sony Corporation | Lens driver, camera module, imaging apparatus, and camera-equipped mobile terminal |
US20220086315A1 (en) * | 2020-09-16 | 2022-03-17 | Samsung Electro-Mechanics Co., Ltd. | Camera module |
US11711602B2 (en) * | 2020-09-16 | 2023-07-25 | Samsung Electro-Mechanics Co., Ltd. | Camera module |
Also Published As
Publication number | Publication date |
---|---|
KR20070039166A (ko) | 2007-04-11 |
JP3916628B2 (ja) | 2007-05-16 |
KR100899063B1 (ko) | 2009-05-25 |
KR100849306B1 (ko) | 2008-07-29 |
TWI281052B (en) | 2007-05-11 |
TW200609555A (en) | 2006-03-16 |
KR20080036242A (ko) | 2008-04-25 |
JP2006071702A (ja) | 2006-03-16 |
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