CN100388037C - Lens driving device - Google Patents
Lens driving device Download PDFInfo
- Publication number
- CN100388037C CN100388037C CNB021605602A CN02160560A CN100388037C CN 100388037 C CN100388037 C CN 100388037C CN B021605602 A CNB021605602 A CN B021605602A CN 02160560 A CN02160560 A CN 02160560A CN 100388037 C CN100388037 C CN 100388037C
- Authority
- CN
- China
- Prior art keywords
- magnetite
- supporting frame
- framework
- spring
- supporting
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Lens Barrels (AREA)
Abstract
The present invention relates to a lens driving device which comprises a front lens driving unit, a back lens driving unit, a static magnetic field unit comprising a magnet and a magnet supporting member for supporting the magnet, a framework containing the static magnetic field unit, the front lens driving unit and the back lens driving unit, a front spring and a back spring, wherein the magnet supporting member is in a cage-shaped structure, and the magnet is embedded between supporting columns of the cage body; the front spring is arranged between a front supporting frame connected in the front lens driving unit and the framework, and the back spring is arranged between a back supporting frame connected in the back lens driving unit and the framework. The framework forms a ring shape and also comprises an inner wall and an outer wall, and the magnet is arranged between the inner wall and the outer wall; a front coil forms a ring shape and is arranged in the clearance between the magnet and the outer wall, and a back coil also forms a ring shape and is arranged in the inner side clearance between the magnet and the inner wall. A notch is arranged on the inner wall of the framework, and a plurality of bulges matched with the size of the notch are arranged on the inner periphery of the annular back supporting frame.
Description
Technical field
The present invention relates to a kind of gearing, particularly a kind of lens driver that is used to realize portable type miniature camera zoom function.
Background technology
As everyone knows, lens driver is generally combined by step motor and feed screw gear train.Fig. 5 shows the typical structure of this drive unit.As shown in Figure 5, in lens driver 100, the roller end of step motor 101 is inserted the gearing mesh of gear 102 backs and feed screw 103 ends, thus the circular motion of stepper motor 101 rotating shafts is transformed to the rectilinear motion of feed screw 103, because lens 105 are fixed on guiding and drive on the nut 104 of feed screw 103, so the rotational angle of step motor has determined the position of lens 105.
But said lens drive unit 100 comprises parts such as step motor 101, gear 102, feed screw 103 and nut 104, and complex structure is bulky, and lens 105 bearing accuracies of this device are not enough.
Summary of the invention
The purpose of this invention is to provide a kind of lens driver, it has the light and lens position advantage of high precision of structure.
Comprise according to lens driver of the present invention:
Comprise front lens, hold front lens front lens mount, supporting front lens mount preceding supporting frame and be installed on before the front lens driver element of preceding coil on the supporting frame;
Comprise the back supporting frame of rear lens, supporting rear lens and be installed on the rear lens driver element of the back coil of back on the supporting frame;
Comprise the static magnetic field unit of the magnetite supporting member of magnetite and supporting magnetite, wherein said magnetite supporting member is a cage structure, and magnetite embeds between the cage pillar body;
The framework that holds static magnetic field unit, front lens driver element and rear lens driver element;
Be connected interior preceding supporting frame of described front lens driver element and the front spring between the framework; And
Be connected interior back supporting frame of described rear lens driver element and the rear spring between the framework,
Wherein, described framework is ring-type and comprises inner and outer wall, described magnetite is placed between inwall and the outer wall, described before coil be ring-type and be placed on magnetite and outer wall between the gap in, described back coil be ring-type and be placed on magnetite and inwall between interior side clearance in, the inwall of described framework is provided with otch, and described back supporting frame is that ring-type and its inner circumference are provided with some projectioies that match with the otch size.
In the said lens drive unit, because the inwall of described framework is provided with otch, is convenient to the back carriage and runs through its otch, so rear lens can be put into the magnetite inboard, make equipment miniaturization.In addition, because the magnetite supporting member is the cage type shape, so improved intensity.
In the said lens drive unit, reasonablely be that front spring and rear spring have the power of outside extension when being in last location.Like this,, front spring and rear spring also can assemble, so the distortion of initial stage spring constant that can keep away rabbit even if being directed to rear.
Description of drawings
Fig. 1 is the diagrammatic cross-section according to lens driver of the present invention.
Fig. 2 is and another diagrammatic cross-section of lens driver shown in Figure 1 that this section and section shown in Figure 1 are the angle of 60 degree.
Fig. 3 is the parts decomposition view of lens driver shown in Figure 1.
Fig. 4 is the diagrammatic cross-section under the lens driver duty illustrated in figures 1 and 2.
Fig. 5 is the synoptic diagram of prior art lens driver.
Embodiment
Below by accompanying drawing the specific embodiment of the present invention is described, similar or identical parts adopt identical label to represent in the accompanying drawing.
As illustrated in fig. 1 and 2, mainly comprise the front lens driver element according to lens driver 1 of the present invention, the rear lens driver element, the static magnetic field generation unit, front spring, rear spring and the framework that holds said units or parts, wherein the front lens unit comprises front lens 2, front lens mount 31, preceding supporting frame 3 and preceding coil 4, the rear lens driver element comprises rear lens 6, back supporting frame 7 and back coil 8, the static magnetic field generation unit comprises magnetite 10 and magnetite supporting member 21, front spring is connected between front lens the driver element interior front lens mount 31 and framework 11, and rear spring is connected between rear lens the driver element interior back supporting frame 7 and framework 11.It is worthy of note, below the position relation of alleged " preceding " and " back " all for object that camera is taken the photograph, that is, represent with " preceding " that from the position that taking the photograph object is nearer farther usefulness " back " is represented.
Before supporting frame 3 make by insulating material (for example synthetic resin etc.), and be shaped as ring-type as shown in Figure 3, the bottom of its inner circumference is provided with the projectioies 22 that adjacent spaces everywhere is 90 degree, therefore can the front lens mount 31 of packing into is fixing, and front lens 2 then is fixed in the front lens mount 31.At above-mentioned protruding 22 afterbody little protruding rib 23 can be set also, it is moving with the neighboring Zhe of following magnetite supporting member 21.The projection of supporting frame 3 upper end face before the outer end 5a of front spring 5 is fixed in.The bottom of supporting frame 3 neighborings before preceding coil 4 can be enclosed within is welded on the outer end 5a of front spring 5 behind the groove of supporting frame 3 neighborings before its lead passes.
Back supporting frame 7 is also made by insulating material (for example synthetic resin etc.), and shape also is a ring-type as shown in Figure 3, inside is provided with protruding 7a, rear lens 6 is fixed between the protruding 7a, back coil 8 is placed between the inside circumference and protruding 7a of back supporting frame 7, and the inner end 9b of rear spring 9 is fixed on the protruding 7b of supporting frame 7 bottom surfaces, back.
Radially magnetized magnetite 10 and magnetite supporting member 21 constitute the static magnetic field unit.Magnetite supporting member 21 is cage shape as shown in Figure 3 and is made by insulating material (for example synthetic resin etc.), comprise 4 pillar 21a between the supporting member upper and lower end face, four rectangular circular-arc magnetites 10 are embedded between 4 pillars, magnetite 10 are fixed in the magnetite supporting member 21 of cage shape thus.
Ring-shaped frame 11 can be made by wrought iron magnetic material, as shown in Figure 3, it comprises outer wall 11a, inwall 11b and bottom surface 11c, and outer wall 11a is higher than inwall 11b, inwall 11b serves as at interval otch 11d everywhere to be set with 90 degree, and the protruding 7a of back supporting frame 7 just in time can run through otch 11d.
The bottom surface of magnetite supporting member 21 is fixed on the bottom surface of framework 11, the projection of supporting frame 3 upper end face before the outer end 5a of front spring 5 is fixed in as mentioned above, and inner end 5b is fixed on the projection of magnetite supporting member 21 front end faces.Periphery upper surface at magnetite supporting member 21 is provided with protruding 21c, can not fall on the projection 22 before it is resisted against in the supporting frame 3, and suppressed along front spring 5 radially impulsive force and the shift in position that causes.
Before coil 4 be positioned at the outer side clearance that the outer wall 11a by magnetite 10 and framework 11 is constituted.Equally, back coil 8 is positioned at the side clearance that the inwall 11b by magnetite 10 and framework 11 is constituted.Having formed with magnetite 10 thus is top, via outer wall 11a, bottom surface 11c and the inwall 11b of framework 11, finally is back to a magnetic circuit of magnetite 10.
When back coil 8 inserts back supporting frame 7, its connection lead runs through the otch 11d of framework 11 and is welded on the inner end 9b of rear spring 9 along the side of protruding 7a, and the outer end 9a of rear spring 9 is fixed on the projection of bottom at magnetite supporting member 21 rears, this projection with leaf spring as power supply terminal.In addition, elongated rib (having 4 places) is set, thereby making that Zhe between itself and supporting frame 7 neighborings, back is moving becomes easier at the inside circumference of magnetite supporting member 21.
The outer end 9a of rear spring 9 is inlayed on the projection of magnetite supporting member 21 into, subsequently by press fit under the leaf spring 9aa.The inner 9b of rear spring 9 is embedded on the projection of back supporting frame 7, subsequently by press fit under the leaf spring 9bb.When after after supporting frame 7 inserts frameworks 11 because the lug boss 7b (4 places are arranged) of back carriage 7 is resisted against on the framework 11 bottom surface 11c,, promptly finish assembling after rear spring 9 is stretched so it is poor to produce section between outer end 9a and the inner 9b.Like this,, also be in the state of being stretched, so can avoid the intrinsic initial stage spring constant distortion of leaf spring even front spring 5 and rear spring 9 are positioned at rear.
Fig. 4 is the diagrammatic cross-section under the lens driver duty shown in Figure 1.When coil 4 applies electric current forward, 10 pairs of coils of magnetite 4 produce electromagnetic force, this force transmission is to the preceding supporting frame 3, front lens mount 31 and the lens 2 that are fixed together with coil 4, make whole front lens driver element forwards (above in Fig. 4 being) move, thereby the front spring 5 of magnetite supporting member 21 and front lens mount 31 is fixed at the compressing two ends, when spring 5 is compressed to a certain degree, the reciprocal elastic force of its generation equates that with this electromagnetic force spring 5 this moment (also being the front lens driver element) is in the equilibrium position.Because the size of electromagnetic force is directly proportional with institute's galvanization in the coil 4, and the elastic force of front spring 5 is directly proportional with its displacement (being equal to the displacement of front lens driver element), therefore can make the front lens driver element produce required displacement by apply suitable current in coil 4.Equally, when coil 4 applies electric current backward, 10 pairs of coils of magnetite 8 produce electromagnetic force, this force transmission is to the back supporting frame 7 and the rear lens 6 that are fixed together with coil 8, make whole rear lens driver element forwards (above in Fig. 4 being) move, thereby the rear spring 8 of framework 11 and back supporting frame 7 is fixed at the compressing two ends, when spring 8 is compressed to a certain degree, the reciprocal elastic force of its generation equates that with this electromagnetic force spring 8 this moment (also being the rear lens driver element) is in the equilibrium position.Because the size of electromagnetic force is directly proportional with institute's galvanization in the coil 8, and the elastic force of rear spring 8 is directly proportional with its displacement (being equal to the displacement of rear lens driver element), therefore can make the rear lens driver element produce required displacement by apply suitable current in coil 8.
Because by passing to the displacement that suitable electric current is scalable front lens 2 and rear lens 6 in be at the front circle 4 and the back coil 8, so in camera, fixed lens can be arranged on than rear lens 6 more by on the position, back (being the below of rear lens 6 among Fig. 4), by regulating the relative position of these lens, subject is focused on the imaging plane that is made of the inductive coupling device.
In the process of assembling said lens drive unit, the lead of preceding coil 4 is drawn along the groove of preceding supporting frame 3 in advance, and magnetite 10 is packed in the magnetite supporting mass 21 in advance.Subsequently preceding coil 4 is enclosed within the bottom, neighboring of preceding supporting frame 3, the back supporting frame 7 interior also difference of then rear lens 6 and back coil 8 being packed into are fixed.
Next, back supporting frame 7 is packed in the magnetite supporting member 21, rear spring 9 and leaf spring 9aa, 9bb are fixed on the projection of lower surface of back supporting frame 7.Then, preceding supporting frame 3 and front end bar 32 are enclosed within magnetite supporting member 21 outsides, front spring 5 and leaf spring 5aa, 5bb are fixed between magnetite supporting member 21 and the front lens mount 31.The lead of the lead of back coil 8 and preceding coil 4 is welded to respectively on inner 9b, the outer end 5a, and front end bar 32 also is welded on the 5a of outer end.
Again next, with magnetite supporting member 21 framework 11 of packing into, and be fixed on the bottom surface 11c of framework 11.Front lens 2 is packed in the front lens mount 31 in advance, then front lens mount 31 is fixed on the forefront part of magnetite supporting member 21.
In the through hole part of the bottom surface of framework 11 11c, two outside power inputs on the preceding coil 4 are to introduce from 2 forward end bars 32; Then two outside power inputs on the coil 8 are introduced from two outer end 9a of rear spring 9.
Claims (2)
1. a lens driver is characterized in that, comprises:
Comprise front lens, hold front lens front lens mount, supporting front lens mount preceding supporting frame and be installed on before the front lens driver element of preceding coil on the supporting frame;
Comprise the back supporting frame of rear lens, supporting rear lens and be installed on the rear lens driver element of the back coil of back on the supporting frame;
Comprise the static magnetic field unit of the magnetite supporting member of magnetite and supporting magnetite, wherein said magnetite supporting member is a cage structure, and magnetite embeds between the cage pillar body;
The framework that holds static magnetic field unit, front lens driver element and rear lens driver element;
Be connected interior preceding supporting frame of described front lens driver element and the front spring between the framework; And
Be connected interior back supporting frame of described rear lens driver element and the rear spring between the framework,
Wherein, described framework is ring-type and comprises inner and outer wall, described magnetite is placed between inwall and the outer wall, described before coil be ring-type and be placed on magnetite and outer wall between the gap in, described back coil be ring-type and be placed on magnetite and inwall between interior side clearance in, the inwall of described framework is provided with otch, and described back supporting frame is that ring-type and its inner circumference are provided with some projectioies that match with the otch size, and described projection can run through described otch;
Be in the state of being stretched when wherein, front spring and rear spring are positioned at last location.
2. lens driver as claimed in claim 1 is characterized in that, described before supporting frame be that ring-type and its underpart periphery serve as that 4 ribs are set at interval with 90 degree, described magnetite supporting member is that ring-type and its serve as that 4 projectioies are set at interval with 90 degree foremost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021605602A CN100388037C (en) | 2002-12-31 | 2002-12-31 | Lens driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021605602A CN100388037C (en) | 2002-12-31 | 2002-12-31 | Lens driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1514296A CN1514296A (en) | 2004-07-21 |
| CN100388037C true CN100388037C (en) | 2008-05-14 |
Family
ID=34237915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021605602A Expired - Fee Related CN100388037C (en) | 2002-12-31 | 2002-12-31 | Lens driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100388037C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100367064C (en) * | 2004-10-22 | 2008-02-06 | 华宇电脑股份有限公司 | Lens driving mechanism |
| CN101288011B (en) * | 2005-09-02 | 2012-11-28 | 日本电产三协株式会社 | Lens drive device |
| KR100836776B1 (en) | 2005-12-02 | 2008-06-10 | 엘지이노텍 주식회사 | Elastic member for lens driving motor and motor for driving lens |
| TWI314665B (en) | 2006-01-12 | 2009-09-11 | Lite On Technology Corp | Digital camera module |
| CN101009773B (en) * | 2006-01-24 | 2010-10-13 | 光宝科技股份有限公司 | Digital camera module |
| CN101068091B (en) * | 2007-06-13 | 2010-09-01 | 宜兴市贵鑫磁电高科技有限公司 | Ultrasmall type voice coil motor |
| CN107315232B (en) * | 2016-04-26 | 2023-10-31 | 新思考电机有限公司 | Lens driving device, camera device equipped with lens driving device, and electronic apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5892629A (en) * | 1994-09-20 | 1999-04-06 | Matsushita Electric Industrial Co.,Ltd. | Objective lens actuator |
| CN1214459A (en) * | 1997-09-10 | 1999-04-21 | 柯尼卡株式会社 | Camera equipped with zoom lens |
| JP2002365514A (en) * | 2001-06-06 | 2002-12-18 | Shicoh Eng Co Ltd | Lens drive device |
-
2002
- 2002-12-31 CN CNB021605602A patent/CN100388037C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5892629A (en) * | 1994-09-20 | 1999-04-06 | Matsushita Electric Industrial Co.,Ltd. | Objective lens actuator |
| CN1214459A (en) * | 1997-09-10 | 1999-04-21 | 柯尼卡株式会社 | Camera equipped with zoom lens |
| JP2002365514A (en) * | 2001-06-06 | 2002-12-18 | Shicoh Eng Co Ltd | Lens drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1514296A (en) | 2004-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105024516B (en) | Voice coil motor array module | |
| CN201152906Y (en) | Lens driving apparatus | |
| CN103454749B (en) | A kind of closed loop lens drive motor | |
| CN101860166B (en) | Actuator and shockproof camera module | |
| CN101488698B (en) | Voice coil type focus motor | |
| CN104142553A (en) | Tri-axis close loop feedback controlling module for electromagnetic lens driving device | |
| CN106537213A (en) | Lens holder driving device and camera-equipped portable terminal | |
| KR20150113675A (en) | Dual camera lens module | |
| CN104407487A (en) | Voice coil motor capable of realizing OIS (optical image stabilization) through pure translational motion | |
| US7573660B2 (en) | Lens module and camera module having same | |
| CN100388037C (en) | Lens driving device | |
| CN101825759A (en) | Lens driving apparatus | |
| CN103792644B (en) | Lens mount driving means and portable equipment | |
| JP2008020668A (en) | Lens drive device | |
| US7417811B2 (en) | Lens module | |
| CN103454750A (en) | Optical anti-vibration motor | |
| CN101645641A (en) | Actuator | |
| CN101587221B (en) | The lens group of camera module | |
| US8014658B2 (en) | Image stabilizer and camera module having same | |
| JP2006309109A (en) | Electromagnetically actuated adjusting apparatus applied to lens | |
| CN204287688U (en) | A kind of voice coil motor being realized optical anti-vibration by pure translational movement | |
| CN112242785B (en) | Linear motor, lens assembly and electronic equipment | |
| CN107102495A (en) | The electronic installation of camera module and application the camera module | |
| JP6101906B2 (en) | Lens driving device, camera and camera-equipped mobile phone | |
| CN1465996A (en) | Lens driving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20141231 |
|
| EXPY | Termination of patent right or utility model |