WO2008131637A1 - Driving device for lens - Google Patents
Driving device for lens Download PDFInfo
- Publication number
- WO2008131637A1 WO2008131637A1 PCT/CN2008/000477 CN2008000477W WO2008131637A1 WO 2008131637 A1 WO2008131637 A1 WO 2008131637A1 CN 2008000477 W CN2008000477 W CN 2008000477W WO 2008131637 A1 WO2008131637 A1 WO 2008131637A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- front side
- lens carrier
- yoke ring
- rear side
- Prior art date
Links
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
-
- 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
Definitions
- the present invention relates to the field of camera lens driving devices; in particular, to a lens driving device for bumping and impact resistance specifically for focusing on a miniature camera; the present invention is mainly applied to a miniature camera having an autofocus function, and Combined with miniaturized, high-quality sensors, it is especially suitable for applications in mobile phones, computers, automobiles and robots. Background technique
- the electromagnetic force generated after the coil is energized resists the pre-pressure of the front side spring and the rear side spring to urge the lens support to move in the optical axis direction.
- the lens driving device comprises a yoke ring disposed on the base, a magnet and a coil are disposed in the yoke ring, and a lens carrier with a lens is disposed on the inner circumference of the coil
- the lens carrier is movable back and forth in the coil;
- the lens carrier is provided with a lens movement damping device for maintaining balance and stability during movement of the lens carrier; and the electromagnetic force generated after the coil is energized Resisting the damping force of the lens movement damping device to drive the lens carrier to move in the optical axis direction; and positioning means for preventing the lens carrier from being displaced and moved between the lens carrier and the yoke ring;
- the yoke ring is disposed as a "concave"-shaped cross-sectional structure with a central through hole and a square outer shape, and one side of the "concave"-shaped cross section is provided with an inner cavity outside the inner circle;
- the magnet is disposed at
- the positioning device may further include a plurality of openings of the yoke ring and a lens carrier: the outer circumference is provided with a plurality of ribs penetrating up and down; the opening portion is matched with the rib arch; To further prevent misalignment between the yoke ring and the lens carrier in operating conditions.
- Figure 1 is a front elevational view of the assembled state of the present invention
- Figure 3 is an exploded perspective view of the present invention
- the yoke ring can also be arranged in a polygonal shape and a polygonal inner cavity to meet the needs of various lens driving devices; for example, the yoke ring cavity is set to a pentagon, or a hexagon, or an octagon Inner cavity; the magnets 4 are respectively placed at the corners of the pentagon, or hexagonal, or octagonal cavity.
- the other side of the rear side spacer 7 is attached with a rear side spring 8
- the other side of the rear side spring 8 is attached with a base 9 .
- the base 9 is used for positioning and pressing the back side spacer 7 .
- the front side spring 3 and the rear side spring 8 serve as lens movement dampers for maintaining balance and stability during the movement of the lens carrier, and are resistant to bumps and impacts.
- a front side spring 3 is disposed between the front side spacer 2 and the magnet 4.
- the rear side spring 8 is disposed in a square outer shape and centrally provided with a rear side spring circular hole 84; the rear side spring is provided with a plurality of symmetrically disposed rear side spring spring wires 82 ; the rear side spring is provided with a plurality of symmetry A rear side recess 83 is disposed; the rear side recess cooperates with the lens carrier rib 62.
- the rear side spring is disposed between the rear side gasket and the base.
- the lens carrier 6 is disposed in the inner hole of the yoke ring 1 and is supported by the front side spring 3 and the rear side spring 8, and a coil 5 is disposed inside the yoke ring 1, and the coil 5 is fixed to the outer circumference of the lens carrier 6.
- the rear side spring 8 on the lens driving device is connected as a conductive terminal to the lead wire of the coil 5 to drive the power source, and an electric circuit is formed in the coil 5 through the terminal of the rear side reed 8.
- a current is passed through the coil 5
- an electromagnetic force is induced in a magnetic field formed inside the magnet 4 and the yoke ring 1, and the lens carrier 6 is moved forward or backward in the optical axis direction by the electromagnetic force, when the lens moves.
- the front side spring 2 and the rear side spring generate a reaction force.
- the reaction force is balanced with the electromagnetic force, the lens carrier 6 can be held at a certain position to achieve the purpose of the camera autofocus.
- the lens driving device of the present invention is characterized by a yoke ring 1 having a square outer shape; see Figs.
- the yoke ring circumferential positioning groove 11, the front side gasket circumferential positioning groove 21, the front side spring circumferential positioning groove 31, the lens carrier circumferential positioning groove 61, and the rear side gasket circumferential positioning groove 71 are all assembled with the jig
- the four-point positioning pin is matched.
- the circumferential positioning grooves are used as the reference for assembly positioning, and can be assembled on the same assembly positioning fixture, which not only improves the above-mentioned yoke ring, front side gasket, front side spring, lens carrier, and rear side gasket parts. The need for coaxiality, and simplifies the assembly process and improves production efficiency.
- the yoke ring circumferential positioning groove 11 In order to facilitate processing and assembly, the yoke ring circumferential positioning groove 11, the front side gasket circumferential positioning groove 21, the front side spring circumferential positioning groove 31, the lens carrier circumferential positioning groove 61, and the rear side gasket circumferential positioning groove
- the optimum setting of 71 is four and is evenly distributed in the circumferential direction.
- the yoke ring 1, the front side spacer 2, the front side spring 3, the rear side spacer 7, and the base 9 of the lens driving device of the present invention are all of a flat structure and are nested with each other, and they do not require a front side.
- the inlay fitting between the part and the rear part is simpler than the structure of each part of the existing lens driving device, thereby greatly improving the processability of each part.
- the front side spring 3 is provided with a front side spring wire 32 which is symmetrically arranged at the center of the front side reed
- the rear side spring 8 is provided with a rear side spring wire 82 which is symmetrically arranged at the center of the rear side spring, the front side spring spring
- the function of the central symmetrically uniform manner of the wire and the rear side spring wire is that when the lens carrier moves, the tangential force generated when the wire is deformed along the optical axis direction is canceled each other, thereby preventing the lens carrier from rotating. Offset; see Figure 3.
- the circular hole of the yoke ring 1 is provided with four opening portions 12, and the outer periphery of the lens carrier is provided with four rib arches 62 which are vertically penetrated; the yoke ring opening portion 12 cooperates with the lens carrier rib arch 62 to prevent the lens carrier Rotation, when the lens is screwed into the lens carrier, the lens carrier can be prevented from rotating to cause damage of the front and rear side reeds without the need of additional lens fixing means, which greatly facilitates the user to perform lens adjustment operation.
- the front portion of the rib arch 62 of the lens carrier is disposed with the yoke ring inner hole opening portion 12; the rear portion 621 of the rib arch 62 of the lens carrier is disposed with the base limiting portion 91 of the base 9, as shown in FIG. 2; Forming a front-rear limit between the lens carrier and the yoke ring and between the lens carrier and the base, thereby preventing damage to the lens driving device caused by vibration and impact.
- the magnet 4 has a triangular prism shape and is excellent in processing technology. Moreover, the triangular prismatic magnet can make full use of the effective space of the yoke ring 1 of the outer inner circle, which not only increases the effective thickness of the magnet, but also enhances the magnetic field strength generated by the magnet, and also improves the processing of the magnet. Processability and assembly processability, it is easy to ensure that the magnet is closely attached to the magnet during assembly. The inside of the yoke ring to weaken the magnetic resistance between the magnetic circuit.
- the outer circumference of the yoke ring of the lens driving device of the present invention is also an outer casing of the lens driving device, and the outer casing of the yoke ring is used as a main body to assemble the components in a nested manner, and the rear side gasket and
- the seamless nesting assembly method of the base prevents fine foreign matter and interference light from entering the inside of the lens driving device, thereby significantly improving assembly accuracy.
- the shape of the spring wire of the front and rear side reeds is vertically symmetrical, eliminating the rotational offset caused by the deformation, preventing the slight optical axis shift when the lens carrier moves, and therefore having good electrical and mechanical characteristics, and can be satisfied and miniaturized.
- the high precision and high quality requirements of the sensor is also an outer casing of the lens driving device, and the outer casing of the yoke ring is used as a main body to assemble the components in a nested manner, and the rear side gasket and
- the seamless nesting assembly method of the base
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009536592A JP4903878B2 (ja) | 2007-04-27 | 2008-03-10 | レンズ駆動装置 |
EP08714930.8A EP2144104B1 (en) | 2007-04-27 | 2008-03-10 | Driving device for lens |
US12/445,837 US8009372B2 (en) | 2007-04-27 | 2008-03-10 | Lens driving device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200710068340.8 | 2007-04-27 | ||
CNA2007100683408A CN101038361A (zh) | 2007-04-27 | 2007-04-27 | 透镜驱动装置 |
CN2007103009008A CN101231373B (zh) | 2007-04-27 | 2007-12-28 | 一种透镜驱动装置 |
CN200710300900.8 | 2007-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008131637A1 true WO2008131637A1 (en) | 2008-11-06 |
Family
ID=38889384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2008/000477 WO2008131637A1 (en) | 2007-04-27 | 2008-03-10 | Driving device for lens |
Country Status (5)
Country | Link |
---|---|
US (1) | US8009372B2 (zh) |
EP (1) | EP2144104B1 (zh) |
JP (1) | JP4903878B2 (zh) |
CN (6) | CN101038361A (zh) |
WO (1) | WO2008131637A1 (zh) |
Cited By (3)
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JP2011109908A (ja) * | 2009-11-20 | 2011-06-02 | Lg Innotek Co Ltd | ボイスコイルモーター |
JP2011128454A (ja) * | 2009-12-18 | 2011-06-30 | Tdk Corp | レンズ保持装置 |
US9356501B2 (en) | 2009-02-17 | 2016-05-31 | Lg Innotek Co., Ltd. | Motor for driving lens |
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- 2007-12-28 CN CN2007103009008A patent/CN101231373B/zh not_active Expired - Fee Related
-
2008
- 2008-01-02 CN CNU2008200023412U patent/CN201152906Y/zh not_active Expired - Lifetime
- 2008-01-04 CN CNA2008100016682A patent/CN101221276A/zh active Pending
- 2008-01-04 CN CNB2008100016678A patent/CN100568040C/zh not_active Expired - Fee Related
- 2008-01-04 CN CNA2008100016767A patent/CN101221277A/zh active Pending
- 2008-03-10 WO PCT/CN2008/000477 patent/WO2008131637A1/zh active Application Filing
- 2008-03-10 JP JP2009536592A patent/JP4903878B2/ja not_active Expired - Fee Related
- 2008-03-10 US US12/445,837 patent/US8009372B2/en not_active Expired - Fee Related
- 2008-03-10 EP EP08714930.8A patent/EP2144104B1/en not_active Not-in-force
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9356501B2 (en) | 2009-02-17 | 2016-05-31 | Lg Innotek Co., Ltd. | Motor for driving lens |
US10088646B2 (en) | 2009-02-17 | 2018-10-02 | Lg Innotek Co., Ltd. | Motor for driving lens |
JP2011109908A (ja) * | 2009-11-20 | 2011-06-02 | Lg Innotek Co Ltd | ボイスコイルモーター |
JP2015146731A (ja) * | 2009-11-20 | 2015-08-13 | エルジー イノテック カンパニー リミテッド | ボイスコイルモーター |
JP2017070209A (ja) * | 2009-11-20 | 2017-04-06 | エルジー イノテック カンパニー リミテッド | ボイスコイルモーター |
JP2018139490A (ja) * | 2009-11-20 | 2018-09-06 | エルジー イノテック カンパニー リミテッド | ボイスコイルモーター |
JP2011128454A (ja) * | 2009-12-18 | 2011-06-30 | Tdk Corp | レンズ保持装置 |
Also Published As
Publication number | Publication date |
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EP2144104A1 (en) | 2010-01-13 |
CN101038361A (zh) | 2007-09-19 |
EP2144104B1 (en) | 2014-11-12 |
EP2144104A4 (en) | 2011-03-16 |
JP4903878B2 (ja) | 2012-03-28 |
CN101221277A (zh) | 2008-07-16 |
CN101231373A (zh) | 2008-07-30 |
US8009372B2 (en) | 2011-08-30 |
CN201152906Y (zh) | 2008-11-19 |
CN101221276A (zh) | 2008-07-16 |
CN101251636A (zh) | 2008-08-27 |
JP2010510531A (ja) | 2010-04-02 |
US20110013298A1 (en) | 2011-01-20 |
CN100568040C (zh) | 2009-12-09 |
CN101231373B (zh) | 2010-09-22 |
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