CN1831576A - Lens drive apparatus - Google Patents

Lens drive apparatus Download PDF

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Publication number
CN1831576A
CN1831576A CNA2005101161904A CN200510116190A CN1831576A CN 1831576 A CN1831576 A CN 1831576A CN A2005101161904 A CNA2005101161904 A CN A2005101161904A CN 200510116190 A CN200510116190 A CN 200510116190A CN 1831576 A CN1831576 A CN 1831576A
Authority
CN
China
Prior art keywords
spring
carriage
location division
lens
urceolus portion
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CNA2005101161904A
Other languages
Chinese (zh)
Other versions
CN100381850C (en
Inventor
白木学
关口直树
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shicoh Engineering Co Ltd
Original Assignee
Shicoh Engineering Co Ltd
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 Shicoh Engineering Co Ltd filed Critical Shicoh Engineering Co Ltd
Publication of CN1831576A publication Critical patent/CN1831576A/en
Application granted granted Critical
Publication of CN100381850C publication Critical patent/CN100381850C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • 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
    • G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
    • 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
    • G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • 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

Abstract

The lens driving device of the present invention has springs to support the bearer to the outer barrel, a coil and a magnet. The coil is powered to produce electromagnetic force for the bearer to move toward the optical axis of the lens; the springs are plate springs with ring top view; and locating parts are set in the bearer or the springs for locating the bearer and the outer barrel. The present invention makes it possible for the bearer to move toward the optical axis of the lens smoothly without deformation of the springs caused by the transverse deviation and loosing of the bearer and change of motor in characteristics.

Description

Lens driver
Technical field
The present invention relates to lens driver.
Background technology
Patent documentation 1 (TOHKEMY 2004-280031 communique) has disclosed the lens driver that a kind of utilization makes carriage move to the optical axis direction of lens to the electromagnetic force that coil electricity produced, and it has yoke roughly cylindraceous, loads the urceolus portion of yoke, has the carriage of lens, with spring, coil and the magnet of bearing bracket in urceolus portion.
But, in the prior art that above-mentioned patent documentation 1 is disclosed, owing to only use spring-loaded in urceolus portion on carriage, so when transverse force acts on the carriage, carriage just produces off normal or loosening, and spring produces distortion, and the characteristic of motor is changed.In addition, when horizontal force acts on the carriage, when bracket locations produces off normal, gap between carriage and the urceolus portion can not be held in necessarily, between the inner peripheral surface of the outer peripheral face of carriage and urceolus portion sliding friction takes place, and carriage is difficult to successfully to move to the optical axis direction of lens.
Summary of the invention
The object of the present invention is to provide a kind of lens driver, its can prevent the horizontal off normal of carriage or the loosening spring that is produced distortion, can prevent that motor characteristic from changing and carriage is successfully moved to the optical axis direction of lens.
For achieving the above object, the 1st technical scheme of the present invention is, a kind of lens driver, utilization makes carriage move to the optical axis direction of lens to the electromagnetic force that coil electricity produced, it has yoke roughly cylindraceous, load the urceolus portion of yoke, have the carriage of lens, with spring, coil and the magnet of bearing bracket in urceolus portion, be characterized in that spring is the leaf spring of overlooking to circular, either party at carriage or spring is provided with the location division, to positioning between carriage and the urceolus portion.
The 2nd technical scheme of the present invention is, it is characterized in that, in technical scheme 1 described invention, spring have the bracket side of being installed in interior ring, be installed in the outer shroud of urceolus portion side, the location division radius vector that is located at the spring side is darted to foreign side on the interior ring of spring, and the outboard end of location division is relative with the inner peripheral surface of urceolus portion.
The 3rd technical scheme of the present invention is, it is characterized in that, in technical scheme 2 described inventions, spring has a plurality of arms that interior ring and outer shroud are coupled together, and arm is provided with along the annular direction devices spaced apart ground of spring, is provided with the location division between arm.
The 4th technical scheme of the present invention is, it is characterized in that in technical scheme 1 described invention, the location division radius vector is darted on the carriage to foreign side, and the outboard end of location division is relative with week in the outer shroud of spring.
Adopt the invention of technical scheme 1, because the location division that between the either party of carriage or spring is provided with carriage and urceolus portion, positions, therefore, can limit carriage to laterally moving by the location division, even transverse force acts on carriage, carriage also is difficult to off normal or takes place become flexible, like this, camber of spring can be prevented, the variation of motor characteristic can be prevented.
Owing to laterally moving, so the gap between carriage and the framework can be held in necessarily, be difficult to take place sliding friction by location division restriction carriage between the inner peripheral surface of carriage and urceolus portion, carriage can be successfully moves to the optical axis direction of lens.
Adopt the invention of technical scheme 2, obtain and the identical effect of technical scheme 1 described invention, and,, obtain save spaceization and cost-savingization so when the location division is set, needn't use other member owing in spring, be equipped with the location division.
Adopt the invention of technical scheme 3, obtain and the identical effect of technical scheme 2 described inventions, and because the location division is located between the arm of spring, so can effectively utilize the free space of spring, when spring forming, available equal dies is carried out moulding to arm and location division, is easy so make.
Adopt the invention of technical scheme 4, obtain and the identical effect of technical scheme 1 described invention, and,, obtain save spaceization and cost-savingization so when the location division is set, needn't use other member because the location division is located on the carriage.
Description of drawings
Fig. 1 is the longitudinal section of the lens driver of this example, and (a) that pulled out expression by dot-and-dash line is the cut-open view that concerns between expression front side spring and the urceolus portion, (b) is the cut-open view that concerns between expression rear side spring and the urceolus portion.
Fig. 2 is the vertical view of front side spring shown in Figure 1.
Fig. 3 is the vertical view of rear side spring shown in Figure 1.
Fig. 4 is the exploded perspective view of the lens driver of this example.
Embodiment
With reference to the accompanying drawings, describe example of the present invention in detail.Fig. 1 is the longitudinal section of the lens driver of this example, and (a) that pulled out expression by dot-and-dash line is the cut-open view that concerns between expression front side spring and the urceolus portion, (b) is the cut-open view that concerns between expression rear side spring and the urceolus portion.Fig. 2 is the vertical view of front side spring shown in Figure 1.Fig. 3 is the vertical view of rear side spring shown in Figure 1.Fig. 4 is the exploded perspective view of the lens driver of this example.
The lens driver 1 of this example is contained on the automatic focus lens of mobile phone, has: yoke 3 roughly cylindraceous; The urceolus portion (base 5, framework 6) of yoke 3 is installed; Be configured in the carriage 7 of interior all sides of yoke 3; Be configured in the coil 10 of the outer circumferential side of carriage 7; Be configured in the front side spring 9 of carriage 7 fore-and-aft directions; And rear side spring 11.
The cross section of yoke 3 roughly is a コ word shape, is equipped with the magnet 13 of ring-type in the コ word.Magnet 13 is that ring-type and edge circumferentially are divided into circular-arc 4.
Base 5 is that resin is made, and has the base portion 5a of general planar shape, the base side connecting portion 5b on upright four angles that are located at base portion 5a, is provided with at the inner peripheral surface of base side connecting portion 5b yoke 3 is given the fixing jut 5c of crimping.In addition, the periphery at base side connecting portion 5b is formed with the holding section 24 that engages with the portion that is stuck 29 of framework 6.
Framework 6 is that resin is made, and has the upper wall portions 6a of general planar shape, the frame side connecting portion 6b on upright four angles that are located at upper wall portions 6a, is provided with at the inner peripheral surface of frame side connecting portion 6b yoke 3 is given the fixing jut 6c of crimping.In addition, the periphery at frame side connecting portion 6b is formed with the portion that is stuck 29 that engages with the holding section 24 of base 5.In addition, be formed with circular peristome 6d, be installed in the position that lid 15 on the carriage 7 is positioned at peristome 6d at upper wall portions 6a.
Between the outer rim 15a of the inner peripheral surface of peristome 6d and lid 15, be formed with predetermined gap.When optical axis direction moved, the outer rim 15a of lid 15 did not just contact with the inner peripheral surface 6e of framework 6 at carriage 7.
Front side spring 9 is leaf springs of overlooking to roughly circular, ring 9a and outer shroud 9b in being provided with.In ring 9a be circular, outer shroud 9b is big circular of ring 9a in the radius ratio, has a plurality of arm 9c that both are coupled together between interior ring 9a and outer shroud 9b.Annular direction devices spaced apart along front side spring 9 is provided with arm 9c, is provided with spring side location division 9d between arm 9c.Spring side location division 9d radius vector is dashed forward to foreign side and is established, and corresponding to prominent the establishing of spring side location division 9d, outer shroud 9b is the shape of radius vector to foreign side's depression.In addition, be formed with the roughly notch part 9f of semicircle shape on spring side location division 9d, the pin that the spline during assembling is used just can insert this part.
The interior ring 9a of front side spring 9 is gripped by carriage 7 and lid 15, and outer shroud 9b is clamped and fixed between the yoke 3 and framework 6 that is fixed on the base 5.And the outboard end 9e of spring side location division 9d is relative with the inner peripheral surface 6e of framework 6.In addition, between outer shroud 9b and yoke 3, accompany the place ahead dividing plate 17.
Rear side spring 11 is leaf springs of overlooking to roughly circular, and interior ring 11a is circular, and outer shroud 11b is big circular of ring 11a in the radius ratio, has a plurality of arm 11c that both are coupled together between interior ring 11a and outer shroud 11b.Arm 11c is provided with along the annular direction devices spaced apart ground of rear side spring 11.
Interior ring 11a is fixed on the optical axis direction rear end of carriage 7, and outer shroud 11b is clamped and fixed between the base portion 5a and rear dividing plate 19 of base 5.
In addition, under front side spring 9 and rear side spring 11 state (load does not act on the state of spring) before assembling, ring 9a, 11a and outer shroud 9b, 11b are positioned on the roughly same plane in it, and precompressed acts on spring during assembling, produces ladder between interior ring 9a, 11a and outer shroud 9b, the 11b.
Carriage 7 is roughly cylindric, and its internal fixation has lens 12.In addition, have flange part 21, on flange part 21, be provided with radius vector to the prominent bracket side location division 23 of establishing of foreign side in the rear end side of carriage 7.The outboard end 23a of bracket side location division 23 is relative with interior all 11d of the outer shroud 11b of rear side spring 11.
Below, the assembling and the action effect of the lens driver of this example are described.The assembling of lens driver 1 is that installation rear side spring 11 is configured in the inside of yoke 3 with magnet 13 and the coil 10 that is fixed on the carriage 7, and is installed in by rear dividing plate 19 on the base portion 5a of base 5 on carriage 7.And the interior ring 9a of placement front side spring 9 between dividing plate 17 and the yoke 3 is fixing with lid 15 forwardly, and framework 6 is installed on the base 5, uses the fixedly outer shroud 9b of front side spring 9 of framework 6.
Under the state of having assembled front side spring 9, the spring side location division 9d outboard end 9e of interior ring 9a is relative with the inner peripheral surface 6e of framework 6, and restriction carriage 7 is to laterally moving.In addition, under the state of having assembled rear side spring 11, the outboard end 23a of the bracket side location division 23 of carriage 7 is relative with interior all 11d of outer shroud 11b, and restriction carriage 7 is to laterally moving.
In this example, because the inner peripheral surface 6e of the outboard end 9e of spring side location division 9d and framework 6 relatively and limit carriage 7 to laterally moving, so even transverse force acts on carriage 7, carriage 7 also is difficult to off normal or generation is become flexible.Like this, the distortion of the arm 11c of the arm 9c of front side spring 9 and rear side spring 11 can be prevented, the variation of motor characteristic can be prevented.
In addition, because restriction carriage 7 is to laterally moving, so gap (part of representing with symbol 29 among Fig. 1) and the gap (part of representing with symbol 31 among Fig. 1) between magnet 13 and the coil 10 between gap (part of representing with symbol 27 among Fig. 1), yoke 3 and the coil 10 between the gap between carriage 7 and the framework 6 (the middle part of representing with symbol 25 of Fig. 1 (a)), carriage 7 and the yoke 3 can be held in necessarily, carriage 7 can be successfully moves to the optical axis direction of lens 12.
Owing to being located in the spring, spring side location division 9d encircles on the 9a, thus when the location division is set, needn't use other member, but save spaceization and cost-savingization.
Since spring side location division 9d is located between the arm 9c of spring, the free space of spring can effectively be utilized, and, can prevent the distortion of the relative side knock of location division 9d by enlarging the area of location division 9d.In addition, when spring forming,, be easy so make because available same mould carries out moulding to arm 9c and spring side location division 9d.
In addition, the present invention is not limited to above-mentioned example, without departing from the spirit and scope of the present invention, can do various distortion and implement, and this is self-evident.
Lens driver 1 is not limited to the camera of mobile phone, also can be used for digital camera.

Claims (4)

1. a lens driver has: yoke roughly cylindraceous; The urceolus portion of yoke is installed; Carriage with lens; With the spring of bearing bracket in urceolus portion; Coil and magnet, utilization makes carriage move to the optical axis direction of lens to the electromagnetic force that coil electricity produced, and it is characterized in that, spring is the leaf spring of overlooking to circular, either party at carriage or spring is provided with the location division, to positioning between carriage and the urceolus portion.
2. lens driver as claimed in claim 1, it is characterized in that, spring have the bracket side of being installed in interior ring, be installed in the outer shroud of urceolus portion side, the location division radius vector that is located at the spring side is darted to foreign side on the interior ring of spring, the outboard end of location division is relative with the inner peripheral surface of urceolus portion.
3. lens driver as claimed in claim 2 is characterized in that, spring has a plurality of arms that interior ring and outer shroud are coupled together, and arm is provided with on the annular direction devices spaced apart ground of spring, is provided with the location division between arm.
4. lens driver as claimed in claim 1 is characterized in that the location division radius vector is darted on the carriage to foreign side, and the outboard end of location division is relative with week in the outer shroud of spring.
CNB2005101161904A 2005-03-11 2005-10-19 Lens drive apparatus Expired - Fee Related CN100381850C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005068899A JP4654358B2 (en) 2005-03-11 2005-03-11 Lens drive device
JP2005068899 2005-03-11

Publications (2)

Publication Number Publication Date
CN1831576A true CN1831576A (en) 2006-09-13
CN100381850C CN100381850C (en) 2008-04-16

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Country Status (3)

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JP (1) JP4654358B2 (en)
KR (1) KR100728429B1 (en)
CN (1) CN100381850C (en)

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CN101246246B (en) * 2007-02-13 2010-04-14 阿尔卑斯电气株式会社 Lens drive apparatus
WO2010075681A1 (en) * 2009-01-05 2010-07-08 Hong Kong Applied Science and Technology Research Institute Co. Ltd Miniature actuator and optical apparatus
US7791827B2 (en) 2008-12-10 2010-09-07 Hong Kong Applied Science And Technology Research Institute Co., Ltd. Miniature actuator and optical apparatus
WO2012022270A1 (en) * 2010-08-20 2012-02-23 爱佩仪光电技术（深圳）有限公司 Apparatus and actuator for controlling the inclination or rotation center of an optical system
CN102549470A (en) * 2009-08-20 2012-07-04 阿尔卑斯电气株式会社 Lens drive device
CN103051144A (en) * 2012-01-09 2013-04-17 金龙机电股份有限公司 Voice coil motor
CN102223047B (en) * 2006-11-23 2013-05-01 Lg伊诺特有限公司 Lens driving apparatus
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US10180558B2 (en) 2014-11-28 2019-01-15 Ability Enterprise Co., Ltd. Imaging module and electronic device using the same
CN111381342A (en) * 2018-12-28 2020-07-07 大阳科技股份有限公司 Lens driving module and electronic device
CN113395426A (en) * 2021-06-18 2021-09-14 新思考电机有限公司 Driving device, camera module and electronic equipment

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JP4932575B2 (en) * 2007-04-10 2012-05-16 日本電産サンキョー株式会社 Lens drive device
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KR101696927B1 (en) * 2009-09-15 2017-01-17 엘지이노텍 주식회사 Voice coil motor
JP6086290B2 (en) * 2012-09-20 2017-03-01 大日本印刷株式会社 Leaf spring, camera module drive mechanism and electronic device terminal

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US9939606B2 (en) 2006-11-23 2018-04-10 Lg Innotek Co., Ltd. Lens driving apparatus
CN102223047B (en) * 2006-11-23 2013-05-01 Lg伊诺特有限公司 Lens driving apparatus
US8451553B2 (en) 2006-11-23 2013-05-28 Lg Innotek Co., Ltd. Lens driving apparatus
US9921387B2 (en) 2006-11-23 2018-03-20 Lg Innotek Co., Ltd. Lens driving apparatus
CN101246246B (en) * 2007-02-13 2010-04-14 阿尔卑斯电气株式会社 Lens drive apparatus
US7791827B2 (en) 2008-12-10 2010-09-07 Hong Kong Applied Science And Technology Research Institute Co., Ltd. Miniature actuator and optical apparatus
WO2010075681A1 (en) * 2009-01-05 2010-07-08 Hong Kong Applied Science and Technology Research Institute Co. Ltd Miniature actuator and optical apparatus
CN102549470A (en) * 2009-08-20 2012-07-04 阿尔卑斯电气株式会社 Lens drive device
CN102375292B (en) * 2010-08-20 2016-05-11 林小军 Control device and the actuator of optical system inclination or center of rotation
CN102375292A (en) * 2010-08-20 2012-03-14 林小军 Device and actuator for controlling inclination or rotation center of optical system
WO2012022270A1 (en) * 2010-08-20 2012-02-23 爱佩仪光电技术（深圳）有限公司 Apparatus and actuator for controlling the inclination or rotation center of an optical system
CN103051144B (en) * 2012-01-09 2016-01-20 金龙机电股份有限公司 Voice coil motor
CN103051144A (en) * 2012-01-09 2013-04-17 金龙机电股份有限公司 Voice coil motor
US10180558B2 (en) 2014-11-28 2019-01-15 Ability Enterprise Co., Ltd. Imaging module and electronic device using the same
CN105721743A (en) * 2014-12-03 2016-06-29 佳能企业股份有限公司 Camera module and electronic device using same
CN105721743B (en) * 2014-12-03 2020-01-21 佳能企业股份有限公司 Camera module and electronic device using same
CN111381342A (en) * 2018-12-28 2020-07-07 大阳科技股份有限公司 Lens driving module and electronic device
CN113395426A (en) * 2021-06-18 2021-09-14 新思考电机有限公司 Driving device, camera module and electronic equipment

Also Published As

Publication number Publication date
CN100381850C (en) 2008-04-16
KR20060097543A (en) 2006-09-14
JP4654358B2 (en) 2011-03-16
JP2006251461A (en) 2006-09-21
KR100728429B1 (en) 2007-06-13

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Granted publication date: 20080416

Termination date: 20121019