WO2009145072A1 - レンズ駆動装置 - Google Patents

レンズ駆動装置 Download PDF

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Publication number
WO2009145072A1
WO2009145072A1 PCT/JP2009/059040 JP2009059040W WO2009145072A1 WO 2009145072 A1 WO2009145072 A1 WO 2009145072A1 JP 2009059040 W JP2009059040 W JP 2009059040W WO 2009145072 A1 WO2009145072 A1 WO 2009145072A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
leaf spring
pair
driving device
lens holder
Prior art date
Application number
PCT/JP2009/059040
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
智彦 大坂
貴 石沢
Original Assignee
ミツミ電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ミツミ電機株式会社 filed Critical ミツミ電機株式会社
Priority to CN200980119061.7A priority Critical patent/CN102047164B/zh
Publication of WO2009145072A1 publication Critical patent/WO2009145072A1/ja

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Classifications

    • 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
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • 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
    • H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb

Definitions

  • the present invention relates to a lens driving device, and more particularly, to an autofocus lens driving device used for a portable small camera.
  • the camera mobile phone is equipped with a portable small camera.
  • This portable small camera uses an autofocus lens driving device.
  • various autofocus lens driving devices have been proposed.
  • Patent Document 1 Japanese Patent Laid-Open No. 2006-258969 discloses a camera-equipped mobile phone in which the time required for autofocus is reduced.
  • the camera-equipped mobile phone (lens driving device) disclosed in Patent Document 3 includes a holder (lens holder) having a cylindrical portion with a lens (lens holder, lens barrel) attached to one end, and the holder (lens holder).
  • a drive coil fixed so as to be positioned around the cylindrical portion of the holder, a yoke having a permanent magnet facing the drive coil And a pair of leaf springs that support the holder (lens holder) so as to be displaceable in the optical axis direction while being positioned in the radial direction.
  • One of the pair of leaf springs is called an upper leaf spring (front spring), and the other is called a lower leaf spring (rear spring).
  • the inner peripheral end of the upper leaf spring (front spring) is sandwiched between the upper end (front end) of the holder and the stopper, and is fitted to the holder (lens holder).
  • the lens driving device disclosed in Patent Document 1 is provided on the outer side in the optical axis direction of the lower leaf spring, and sandwiches the lower leaf spring with the end surface in the optical axis direction of the yoke.
  • it further has a REIT electrode (power supply member) disposed between the lower leaf spring and the actuator base.
  • the sheet-like electrode has a ring-shaped portion (electrode portion) formed in a substantially circular ring shape made of a polyimide sheet material, and an extending portion extending radially outward from the ring-shaped portion.
  • the extending portion extends to the outside of the actuator base through the insertion hole of the actuator base.
  • the extension part is connected to the module substrate and serves to supply a current to the drive coil. Electric power can be supplied to the drive coil by soldering the tips of the pair of lead wires of the drive coil to terminal portions provided on the ring-shaped portion of the sheet-like electrode.
  • the sheet-like electrode since the sheet-like electrode has flexibility, it is necessary to perform derivation to the module substrate on the side surface of the lens driving device. Since the sheet electrode has flexibility, it is difficult to solder the extended portion of the sheet electrode to the module substrate. Further, there is a risk that the extending portion of the sheet-like electrode protrudes outside the outer shape of the lens driving device.
  • An object of the present invention is to provide a lens driving device including a power supply member that can be easily soldered to a module substrate.
  • Another object of the present invention is to provide a lens driving device including a power supply member that does not protrude outside the outer shape of the lens driving device.
  • a lens driving device is fixed to a lens holder having a cylindrical portion for holding a lens assembly, and the lens holder so as to be positioned around the cylindrical portion.
  • an upper leaf spring and a lower leaf spring that are supported by each other.
  • Each of the upper leaf spring and the lower leaf spring has an inner peripheral end attached to the lens holder and an outer peripheral end attached to the yoke.
  • the lens driving device can adjust the position of the lens holder in the optical axis direction by energizing the driving coil by the interaction between the magnetic field of the permanent magnet and the magnetic field generated by the current flowing in the driving coil.
  • This lens driving device is mounted between a base that sandwiches the yoke and attaches the outer end of the lower leaf spring between the yoke and the lower leaf spring and the base, and supplies power to the drive coil.
  • a supply member is sandwiched between the lower leaf spring and the base and electrically connected to the pair of lead wires of the drive coil, and the flexible printed circuit board.
  • a pair of sheet metal terminals having spring properties extending downward from the printed circuit board to the module board.
  • a power supply member for supplying power to the drive coil is sandwiched between the lower leaf spring and the base and electrically connected to the pair of lead wires of the drive coil, and the flexible printed circuit board. Since the power supply member can be easily soldered to the module substrate because the power supply member is composed of a pair of sheet metal terminals having a spring property extending downward from the printed circuit board to the module substrate, the power supply member is a lens driving device. It does not protrude beyond the outer shape of the.
  • FIG. 1 It is a perspective view of the lens drive device by one embodiment of the present invention. It is a disassembled perspective view of the lens drive device shown in FIG. It is front sectional drawing of the principal part of the lens drive device shown in FIG.
  • FIG. 1 is a perspective view showing the lens driving device 10.
  • FIG. 2 is an exploded perspective view of the lens driving device 10.
  • FIG. 3 is a front sectional view of the main part of the lens driving device 10.
  • an orthogonal coordinate system (X, Y, Z) is used. 1 to 3, in the orthogonal coordinate system (X, Y, Z), the X-axis direction is the front-rear direction (depth direction), the Y-axis direction is the left-right direction (width direction), and Z The axial direction is the vertical direction (height direction). In the example shown in FIGS. 1 to 3, the vertical direction Z is the optical axis O direction of the lens.
  • the optical axis O direction that is, the Z-axis direction is the front-rear direction.
  • the upward direction of the Z axis is the forward direction
  • the downward direction of the Z axis is the backward direction.
  • the illustrated lens driving device 10 is provided in a camera-equipped mobile phone capable of autofocusing.
  • the lens driving device 10 is for moving a lens assembly (lens barrel) (not shown) in the direction of the optical axis O.
  • the lens driving device 10 has a base 12 disposed on the lower side (rear side) in the Z-axis direction (optical axis O direction).
  • an image sensor arranged on the module substrate is mounted on the lower part (rear part) of the base 12.
  • the image sensor picks up a subject image formed by the lens assembly and converts it into an electrical signal.
  • the image pickup device is configured by, for example, a charge coupled device (CCD) image sensor, a complementary metal oxide (CMOS) image sensor, or the like. Therefore, a camera module is configured by a combination of the lens driving device 10, the module substrate, and the image sensor.
  • CCD charge coupled device
  • CMOS complementary metal oxide
  • the lens driving device 10 includes a lens holder 14 having a cylindrical portion 140 for holding a lens assembly (lens barrel), and a driving coil 16 fixed to the lens holder 14 so as to be positioned around the cylindrical portion 140. And a yoke 20 having a permanent magnet 18 facing the drive coil 16 and a pair of leaf springs 22 and 24 provided on both sides of the cylindrical portion 140 of the lens holder 14 in the optical axis O direction.
  • the pair of leaf springs 22 and 24 support the lens holder 14 so as to be displaceable in the optical axis O direction with the lens holder 14 positioned in the radial direction.
  • one leaf spring 22 is called an upper leaf spring
  • the other leaf spring 24 is called a lower leaf spring.
  • the upper leaf spring 22 is also called a front spring
  • the lower leaf spring 24 is also called a rear spring.
  • the yoke 20 has a rectangular tube shape.
  • the yoke 20 includes a rectangular tube-shaped outer tube portion 202 and a rectangular ring-shaped end portion 204 provided at the upper end (front end) of the outer tube portion 202.
  • the drive coil 16 also has a substantially square cylindrical shape that matches the shape of the square cylindrical yoke 20.
  • the cylindrical portion 140 of the lens holder 14 has four contact portions 140-1 projecting radially outward at positions corresponding to the four corners of the drive coil 16.
  • the four corners of the drive coil 16 are bonded to these four contact portions 140-1. That is, the drive coil 16 is bonded at the four contact portions 140-1 of the cylindrical portion 140.
  • the permanent magnet 18 is composed of four permanent magnet pieces 182 having a triangular cross section disposed at the four corners of the yoke 20 and two permanent magnet pieces 184 having a rectangular cross section facing two opposing surfaces of the drive coil 16.
  • the permanent magnet 18 is composed of a total of six permanent magnet pieces 182 and 184 disposed at the four corners and two sides of the rectangular cylindrical outer cylinder portion 202 of the yoke 20.
  • the permanent magnet 18 is disposed on the inner peripheral surface of the outer cylindrical portion 202 of the yoke 20 at a distance from the drive coil 16.
  • the upper leaf spring (front spring) 22 is disposed on the upper side (front side) of the lens holder 14 in the optical axis O direction
  • the lower leaf spring (rear side spring) 24 is disposed on the lower side (rear side) of the lens holder 14 in the optical axis O direction. Be placed.
  • the upper leaf spring (front spring) 22 and the lower leaf spring (rear spring) 24 have substantially the same configuration.
  • the upper leaf spring (front spring) 22 has an inner peripheral end 222 attached to the lens holder 14 and an outer peripheral end 224 attached to the yoke 20.
  • Three arms are provided between the inner peripheral end 222 and the outer peripheral end 224. Each arm portion connects the inner peripheral end 222 and the outer peripheral end 224.
  • the lower leaf spring (rear spring) 24 has an inner peripheral end 242 attached to the lens holder 14 and an outer peripheral end 244 attached to the yoke 20.
  • Three arms are provided between the inner peripheral end 242 and the outer peripheral end 244. Each arm portion connects the inner peripheral side end 242 and the outer peripheral side end 244.
  • the inner peripheral end is also called an inner ring
  • the outer peripheral end is also called an outer ring.
  • the inner peripheral end 222 of the upper leaf spring (front spring) 22 is sandwiched and fixed between the lens holder 14 and the stopper 26.
  • the stopper 26 is fitted to the lens holder 14 so as to sandwich the inner peripheral end 222 of the upper leaf spring (front spring) 22 with the lens holder 14.
  • the outer peripheral side end 224 of the upper leaf spring (front spring) 22 is sandwiched and fixed between the yoke 20 and the cover 28.
  • a ring-shaped plate 34 is disposed between the outer end 224 of the upper leaf spring (front spring) 22 and the cover 28.
  • the stopper 26 has the following functions. That is, the stopper 26 has a function of closely contacting the inner peripheral end 222 of the upper leaf spring (front spring) 22 to the lens holder 14 with high accuracy. As a result, variations in VCM (voice coil motor) characteristics can be improved.
  • the stopper 26 has a function of improving the adhesive strength of the upper leaf spring (front spring) 22. Thereby, the impact resistance of the lens driving device 10 is improved. Further, the stopper 26 has a function of preventing deformation of the upper leaf spring (front spring) 22 when the lens driving device 10 is dropped. This also improves the impact resistance of the lens driving device 10.
  • the stopper 26 has a function of determining the mechanical stroke of the lens driving device 10.
  • the outer end 244 of the lower leaf spring (rear spring) 24 is fixed to the yoke 20 via the spacer 30.
  • the spacer 30 and the outer end 244 of the lower leaf spring (rear spring) 24 are sandwiched and fixed between the yoke 20 and the base 12.
  • An inner peripheral end 242 of the lower leaf spring (rear spring) 24 is fixed to the lower end (rear end) side of the lens holder 14.
  • a female screw 142 is cut on the inner peripheral wall of the cylindrical portion 140 of the lens holder 14.
  • a male screw that is screwed into the female screw 142 is cut on the outer peripheral wall of the lens assembly (lens barrel). Therefore, in order to attach the lens assembly (lens barrel) to the lens holder 14, the lens assembly (lens barrel) is rotated around the optical axis O with respect to the cylindrical portion 140 of the lens holder 14 and along the optical axis O direction. By screwing together, the lens assembly (lens barrel) is accommodated in the lens holder 14 and joined together with an adhesive.
  • a power supply member 32 is disposed between the lower leaf spring (rear spring) 24 and the base 12.
  • the power supply member 32 is for supplying power to the drive coil 16.
  • the power supply member 32 is sandwiched between the lower leaf spring 24 and the base 12, and is electrically connected to the pair of lead wires 162 of the drive coil 16. And a pair of sheet metal terminals 324 having spring properties extending downward to the module substrate.
  • each of the pair of sheet metal terminals 324 is housed in the base 12 and has an elastic contact portion 324-1 having a tip end portion 324-1a that elastically contacts the electrode 322a of the flexible printed circuit board 322. It has a rod-like extension part 324-2 extending from the elastic contact part 324-1 to the module substrate.
  • the base 12 has a pair of recesses 12a for receiving and holding the elastic contact portions 324-1 of the pair of sheet metal terminals 324.
  • the base 12 has a guide 122 having a pair of insertion holes 122a through which the rod-like extension portions 324-2 of the pair of sheet metal terminals 324 are inserted.
  • tip end portion 324-1a of the elastic contact portion 324-1 is plated with gold
  • the electrode 322a of the flexible printed circuit board 322 that is in contact with the tip end portion 324-1a of the elastic contact portion 324-1 is plated with gold.
  • the power supply member 32 is sandwiched between the lower leaf spring 24 and the base 12 and electrically connected to the pair of lead wires 162 of the drive coil 16, and the flexible print substrate 32.
  • the power supply member 32 can be easily connected to the module board by soldering because it is composed of a pair of spring metal terminals 324 extending downward from the board 322 to the module board.
  • the member 32 does not protrude outside the outer shape of the lens driving device 10.
  • a printed circuit board having low heat resistance can be used as the base 12.
  • each of the pair of sheet metal terminals is accommodated in the base and has an elastic contact portion having a tip portion that elastically contacts the electrode of the flexible printed circuit board, and the elastic contact portion.
  • the base may include a pair of recesses for accommodating and holding the elastic contact portions of the pair of sheet metal terminals, and a rod-shaped extension portion of the pair of sheet metal terminals. You may have a pair of insertion hole for inserting. It is preferable that the tip of the elastic contact portion is plated with gold, and the electrode of the flexible printed circuit board that is in contact with the tip of the elastic contact portion is plated with gold.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Studio Devices (AREA)
PCT/JP2009/059040 2008-05-26 2009-05-15 レンズ駆動装置 WO2009145072A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200980119061.7A CN102047164B (zh) 2008-05-26 2009-05-15 透镜驱动装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-136289 2008-05-26
JP2008136289A JP5083557B2 (ja) 2008-05-26 2008-05-26 レンズ駆動装置

Publications (1)

Publication Number Publication Date
WO2009145072A1 true WO2009145072A1 (ja) 2009-12-03

Family

ID=41376953

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/059040 WO2009145072A1 (ja) 2008-05-26 2009-05-15 レンズ駆動装置

Country Status (4)

Country Link
JP (1) JP5083557B2 (enrdf_load_stackoverflow)
CN (1) CN102047164B (enrdf_load_stackoverflow)
TW (1) TW200949409A (enrdf_load_stackoverflow)
WO (1) WO2009145072A1 (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009045223A1 (de) * 2009-09-30 2011-03-31 Carl Zeiss Smt Gmbh Optische Anordnung in einer Projektionsbelichtungsanlage für die EUV-Lithographie
JP5821356B2 (ja) * 2011-07-15 2015-11-24 ミツミ電機株式会社 レンズ駆動装置
KR101971639B1 (ko) 2011-11-30 2019-08-13 엘지이노텍 주식회사 보이스 코일 모터
KR101343197B1 (ko) 2012-09-07 2013-12-19 삼성전기주식회사 카메라 모듈
JP5996672B2 (ja) * 2012-12-26 2016-09-21 シャープ株式会社 レンズ駆動装置
US10114229B2 (en) 2014-01-02 2018-10-30 Lg Innotek Co., Ltd. Lens driving device and camera module comprising same
JP2016038505A (ja) * 2014-08-08 2016-03-22 惠州市大亜湾永昶電子工業有限公司 レンズ駆動装置
WO2016126061A1 (ko) * 2015-02-04 2016-08-11 엘지이노텍(주) 렌즈 구동장치 및 이를 포함하는 카메라 모듈
TWI579630B (zh) * 2015-11-20 2017-04-21 台灣東電化股份有限公司 鏡頭驅動模組
CN105467551A (zh) * 2015-12-26 2016-04-06 上海比路电子有限公司 用于光学变焦马达的一体化底座及其应用工艺
CN106772902B (zh) * 2017-01-10 2023-03-31 惠州萨至德光电科技有限公司 透镜驱动装置
CN110873942B (zh) * 2018-09-03 2024-07-16 新思考电机有限公司 透镜驱动装置、照相机装置及电子设备
KR102262571B1 (ko) * 2019-04-17 2021-06-09 엘지이노텍 주식회사 보이스 코일 모터
KR102109774B1 (ko) * 2019-04-17 2020-05-12 엘지이노텍 주식회사 보이스 코일 모터
KR102384414B1 (ko) * 2020-05-06 2022-04-08 엘지이노텍 주식회사 보이스 코일 모터
CN214540259U (zh) * 2020-12-04 2021-10-29 台湾东电化股份有限公司 光学系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003207708A (ja) * 2002-01-11 2003-07-25 Shicoh Eng Co Ltd レンズ駆動装置
JP2006005693A (ja) * 2004-06-18 2006-01-05 Nippon Telegr & Teleph Corp <Ntt> 波長変換器配置設計方法およびその装置
JP2006071702A (ja) * 2004-08-31 2006-03-16 Mitsubishi Electric Corp レンズ駆動装置及び撮像装置
JP2008072493A (ja) * 2006-09-14 2008-03-27 Mitsumi Electric Co Ltd カメラモジュール

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4617759B2 (ja) * 2004-07-30 2011-01-26 ミツミ電機株式会社 オートフォーカス用アクチュエータ
JP4696790B2 (ja) * 2005-08-31 2011-06-08 ミツミ電機株式会社 カメラ用アクチュエータ
JP4686739B2 (ja) * 2006-05-09 2011-05-25 シコー株式会社 レンズ駆動装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003207708A (ja) * 2002-01-11 2003-07-25 Shicoh Eng Co Ltd レンズ駆動装置
JP2006005693A (ja) * 2004-06-18 2006-01-05 Nippon Telegr & Teleph Corp <Ntt> 波長変換器配置設計方法およびその装置
JP2006071702A (ja) * 2004-08-31 2006-03-16 Mitsubishi Electric Corp レンズ駆動装置及び撮像装置
JP2008072493A (ja) * 2006-09-14 2008-03-27 Mitsumi Electric Co Ltd カメラモジュール

Also Published As

Publication number Publication date
CN102047164B (zh) 2013-05-15
CN102047164A (zh) 2011-05-04
JP2009282421A (ja) 2009-12-03
TW200949409A (en) 2009-12-01
JP5083557B2 (ja) 2012-11-28

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