CN101498828A - Lens shift mechanism employing double-coil - Google Patents

Abstract

The invention relates to a lens shifting gear making use of a twin coils and is suitable for used on an automatic focusing module or a zoom lens module. The lens module at least comprises a container, a lens and a lens shifting gear; wherein, the lens containing a lens group and a lens clamp is sleeved in the container and slide moving approaching or away from the direction of the object in an optical shaft. The invention is characterized in that the lens shifting gear is composed of a first coil and a second coil in pre-and-post arrangement; one of the two coils is arranged in the periphery of the lens and combines the lens to form a simultaneous sliding and moving interlock object, and the other coil keeps steady and not moves; after conducted with electricity current, the first coil and the second coil produce repelling or attraction magnetic force, thus driving the lens interlock object to slide and shift in optical shaft direction.

Description

Utilize the lens shift mechanism of twin coil

Technical field

What the present invention relates to is the lens group that a kind of lens shift mechanism (lens displacement mechanism) supply is used in an automatic focusing or zoom, especially a kind of two solenoids that utilize of finger are arranged with same central shaft, and make wherein that a coil is installed on the camera lens clamping part with synchronous transitional slide, and another coil relative fixed maintenance is motionless, magnetic force by being produced between the two coil adjacent both ends carries out transitional slide with driving and controls lens again.

Background technology

At present on the portable electric devices such as the digital camera that uses, mobile phone, mobile computer with shoot function, standing have (an auto-focusing that can focus automatically, be called for short AF) or miniature lens module (the compact camera module of zoom (zooming), be called for short CCM), and described camera lens module comprises basically: a cavity volume (housing); One camera lens is made up of eyeglass group (lens group) and a camera lens clamping part (lensholder), can be set in the cavity volume and can be on optical axis direction the front and back transitional slide; With a lens shift mechanism (lens displacement mechanism), or be called detent (actuator), it mainly produces shift motion in order to drive described camera lens on optical axis, to reach the effect of automatic focusing or zoom.

The design packet of common lens shift mechanism contains:a kind of piezo-electric motor (piezoelectricmotor) that is called, it is to utilize piezoelectricity (piezoelectric) material principle to form, but general employed piezoelectric can't tolerate the high temperature (260 ℃ of of of of of of about) of reflow (reflow) operation, and the special piezoelectric that can tolerate reflow high temperature is quite expensive, so be unfavorable for mass production or reduce manufacturing cost.Another is called voice coil motor (voice coil motor, be called for short VCM), it is to utilize electromagnetic force to cooperate formation with elastic component (as spring or shell fragment), but (260 ℃ of of of of of of about) will damage voice coil motor or reduce magnetic force when reflow high temperature, as utilize neodymium, iron metals constitutes, can't be though its magnetic force is by force enough by reflow temperature (its magnetic force only remains 1/5 or also few approximately), and as utilizing samarium, cobalt metals constitutor, though it can be by reflow temperature but magnetic force then strong inadequately (its magnetic force can weaken 1/2 or more than), therefore above-mentioned existing piezo-electric motor and voice coil motor all can not use the reflow mode when assembling, cause on volume production efficient to be restricted; The structural design of therefore existing lens shift (control) mechanism is unfavorable for using the mass production processing of reflow mode.

But and for the design of the reflow mass production of lens shift mechanism, having a kind of is to utilize marmem (shaped memory alloy, abbreviation SMA) lens shift mechanism, it is to utilize the characteristic of pyrocondensation cold expanding of SMA with the drive force source as detent (actuator), as US5,185,621A, US5,279,123A, US5,459,544A, US6,307,678B2, US6,449,434B1, WO2005001540, US20020136548, US2007058070, US2007047938, JP64000938, JP9127398, JP62067738, JP3196781, JP2006329111, JP2005275270, JP2005195998, JP2005156892, JP2004184775, JP2004129950, JP2004069986, JP2004038058, JP2000056208 etc., still, the action of SMA pyrocondensation cold expanding is slow and (length) stroke that produced is also limited, make the lens shift amount limited relatively, can't simple and easyly reach the effect of automatic focusing or zoom.

Other has a kind of is to utilize coil electricity to produce the characteristic of magnetic force with the drive force source as detent (actuator), as US7,262,927, US7,196,978, US7,002,879, US6,961,090, US6,687,062, US6,594,450, US6,504,813, US5,745,447, US5,708,633, US5,642,232, US5,485,315, US5,070,489, US4,891,799, US4,684,797, US4,654,515, US4,341,204, US4,341,203, US4,305,383, US4,243,848, US4,123,145, US20070133110, US6,492,889, US6,654,185, US6,424,472, JP10064111, JP60243615, JP10246848, JP10319326, JP11024125, JP2005037865, JP20030302721, JP2005070609, JP2005227705, JP2004280031, JP2005173431, JP2006071702, JP3124292U, JP2005258355, EP1164601, WO2007026830 etc., and described prior art major part is to utilize coil and magnet combo to use are as enclosing within a coil or peripheral annular arrangement is provided with one or several magnet, produce magnetic field and magnetic pole after making coil electricity, and can with magnetic field of setting up by one or several magnet and magnetic pole between form the magnetic force that repels each other or inhale mutually and move to drive camera lens, just the lens shift mechanism of prior art all is provided with magnet or the same item material uses to cooperate coil, as US6,424,472 open lens group 1 as shown in Figure 1, it is to utilize a coil 10 to be located at the bottom of the periphery of a lens mount (lens seat) 11, establishes a camera lens clamping part (lens holder) 13 again in described lens mount 11 inner cavity volumes (receptacle) 12, it utilizes magnetic conductive metal material (magnetic conductive metal material) to make and inner clamps is provided with eyeglass 14, can be moved down (is magnetically attracted to move down ward) by magnetic attraction and work as coil 10 energising rear lens clamping parts 13; And for example WO2007026830 (is US7,298,562) open lens group 2 as shown in Figure 2, it mainly is to utilize two coils 20,20 ' to be folded in outer the placing of the sleeve (sleeve) 22 that is provided with lens barrel (lens barrel) 21 in respectively, and be located on forward and backward two disconnected positions, and described sleeve 22 can utilize magnetic material (magnetic material) to make; Setting firmly one again on the inner edge surface of a lens mount (yoke) 23 made from ferromagnetic material (ferromagnetic material) is vertically at optical axis X (magnetize din the direction perpendicular to the optical axis) to projecting inward ring-shaped magnet (ring-shaped magnet) 24 and its magnetic, and before ring-shaped magnet 23 is positioned at, back two coils 20, between 20 ', then when two coils 20, after the 20 ' energising, preceding, back two coils 20,20 ' and ring-shaped magnet 24 between the electromagnetic force that produces can carry out front and back slip with respect to fixing magnet 24 in order to order about sleeve 22 and interior dress lens barrel 21 thereof; But magnet that the lens shift mechanism of above-mentioned prior art is set or magnetic conductive metal material all are not suitable for using the reflow mode when assembling, cause on volume production efficient and also be restricted, and one or several magnet to reach drive camera lens move institute must enough magnetic field intensitys (or driving magnetic force) itself must have suitable thickness or volume, enclose within the coil or the periphery no matter cause described magnet to be arranged on, formed lens shift mechanism (lens displacement mechanism, or being called detent actuator) shared volume can increase relatively, be unfavorable for the miniaturization requirement of camera lens module (CCM, compact camera module); It is to utilize forward and backward two coils 20,20 ' to divide the forward and backward Fang Bingke that is opened in ring-shaped magnet 23 to move forward and backward to aforementioned again WO2007026830 case as shown in Figure 2, in its structure not but still have the shortcoming that magnet 23 is set, and within the lens mount (yoke) 22 because of include at least two coils 20,20 ' with magnet 23 and three between mobile space cause fore-and-aft direction space or the relative increasing of distance, so still have further room for improvement.

Summary of the invention

Fundamental purpose of the present invention is to provide a kind of lens shift mechanism that utilizes twin coil, supply is used in the camera lens module, described lens shift mechanism is to utilize two solenoids (electromagnetic coil) such as one first coil and one second coil and constitute to arrange before and after the light shaft coaxle of camera lens, and wherein a coil be installed on the camera lens clamping part and can with the synchronous transitional slide of camera lens clamping part, another coil is relative fixed and keep motionless then, again by selecting different coil winding kenel such as a left side/right-turn coil between two coils or controlling different the direction of the winding current, make between the two coil adjacent both ends produce magnetic force with drive and controls lens in the enterprising line slip displacement of optical axis, to promote lens shift mechanism or selectivity and the convenience of its camera lens module on structural design, at the automatic camera lens module of focusing or zoom, and make the camera lens module can anti-reflow (reflow) high temperature and improve the possibility of mass production for applicable.

Still a further object of the present invention is to provide a kind of lens shift mechanism that utilizes twin coil, and all or part of of wherein said camera lens clamping part further can utilize soft magnetic material (ferrite) to make as clamping part inner ring or outer ring; The characteristic that described soft magnetic material has easy magnetization and easily demagnetizes, its Main Ingredients and Appearance can be puron (wrought iron, soft iron), steel, silicon steel, magnesium-zinc alloy (Mg-Zn alloy), nickel zinc alloy (Ni-Znalloy), MnZn alloy (Mn-Zn alloy) or metallic glass (metallic glass) etc. that carbon content is very low, and can the high temperature of anti-the reflow; So, when two coils produce magnetic field between two coils behind the input current respectively, and can make the camera lens clamping part made from soft magnetic material also produce induced magnetism simultaneously, produce the stable electromagnetic force (electromagnetic force) of repelling each other or inhaling mutually to cooperate coil and carry out transitional slide to drive camera lens clamping part (being camera lens), and because of can improving the possibility of mass production by the high temperature of anti-the reflow.

Another object of the present invention is to provide a kind of lens shift mechanism that utilizes twin coil, it further can dispose an elasticity recovery spare (return spring element) on camera lens or its camera lens clamping part, magnetic force between the magnetic pole of the abutting end of two coils disappears or does not produce and does the time spent, described elasticity recovery spare can provide a relative restoring force to the camera lens clamping part, so that described camera lens returns back to original position and reaches automatic focusing or Zoom effect.

Description of drawings

Fig. 1 is prior art US6, the side schematic view of 424,472 lens group;

Fig. 2 is prior art US7, the side schematic view of 298,562 lens group;

Fig. 3 is the schematic perspective view of existing first embodiment of the invention;

Fig. 4 is Fig. 3 one side schematic view;

Fig. 5 is the schematic perspective view of second embodiment of the invention;

Fig. 6 is Fig. 5 one side schematic view;

Fig. 7 is the schematic perspective view of third embodiment of the invention;

Fig. 8 is Fig. 7 one side schematic view;

Fig. 9 is the schematic perspective view of fourth embodiment of the invention;

Figure 10 is Fig. 9 one side schematic view.

Description of reference numerals: 3-lens shift mechanism; 30-first coil; 31-second coil; 301,311-front end; 302,312-rear end; The 4-camera lens module; 40-cavity volume (housing); The 41-camera lens; 42-eyeglass group; 43-camera lens clamping part (lens older); 431-clamping part inner ring; 432-clamping part outer ring; 50-elasticity recovery spare (return spring element).

Embodiment

Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.

The following the disclosed embodiments of the present invention, be at the main composition assembly of lens shift mechanism of the present invention and explain, though therefore the following the disclosed embodiments of the present invention are to be applied in an automatic focusing or the zoom lens module, but with regard to the camera lens module that generally has automatic focusing or zoom function, except lens shift mechanism disclosed in this invention, other structure is the technology of General Notifications, therefore the personage who generally is familiar with this skill in this field understands, the constituent components of disclosed automatic focusing of the present invention or zoom lens module is not limited in following the disclosed embodiments structure, each constituent components of just described automatic focusing or zoom lens module is to carry out many changes, revise, even equivalent transformation, for example: the shaped design of cavity volume in the described camera lens module (housing) does not limit, and the inner space of camera lens module design does not just limit; Or the global shape or the structure kenel of the camera lens of being made up of eyeglass group (lens group) and a camera lens clamping part (lens holder) do not limit yet, camera lens as described (lens) can comprise the eyeglass group who is made of single eyeglass or several eyeglasses, and single eyeglass or eyeglass group generally can speak for sb. beforehand and be located in the fixture and combine formation one camera lens again with a camera lens clamping part (lens holder); Or the soft magnetic material of the shape of described camera lens clamping part (lensholder), structure kenel or use does not limit yet, it can make various different designs in assembling, form a camera lens module to be assembled into one for the shell that can cooperate described camera lens module, inner space, cavity volume (housing) or inner other constituent components etc.; Or other coil turn (turn) number, internal coil diameter (or internal coil diameter sectional area), coil height or electric current turnover direction and size etc. also do not limit between the present invention's two coils, and can calculate according to distracted law of faraday (Faraday-Lenz Law) and correlometer formula, as following formula (1)

B＝Ki/Ic (1)

Wherein, B is magnetic flux density (wb/m2), and K is a coil turn, and i is an electric current, and Ic is the length in magnetic line of force closed curve upper integral path.Can calculate the present invention's two coils other magnetic field intensity by formula (1), with as deriving or testing between two coils, promptly between the magnetic pole of the abutting end of two coils, can produce the foundation of the magnetic force size of repelling each other or inhaling mutually, with the weight that cooperates camera lens with the designing optimal driving force.

With reference to figure 3, shown in Figure 4, it is respectively the solid and the side schematic view of one embodiment of the invention.The present invention utilizes the lens shift mechanism 3 of twin coil, be to can be applicable in an automatic focusing or the focus lens module 4, wherein said camera lens module 4 comprises a cavity volume (housing) 40 basically at least, for a camera lens 41 can be on the optical axis directions X in the cavity volume 40 transitional slide; Described camera lens 41 generally comprises the camera lens clamping part (lens holder) 43 that an eyeglass group 42 and by single eyeglass (lens) or several eyeglasses (as two eyeglasses) formation supplies to be installed with described camera lens group 42, just eyeglass group 42 and camera lens clamping part 43 be form one can synchronization-moving camera lens 41, and be set in the cavity volume 40 and can be on optical axis X transitional slide, do not limit but described camera lens 41 comprises the structure or the assembling kenel of eyeglass group 42 or camera lens clamping part (lens holder) 43.

The present invention utilizes the lens shift mechanism 3 of twin coil to be characterised in that: utilize two coils, comprising one first coil 30 and one second coil 31 is that optical axis X arranges formation with same central shaft, and make a wherein coil, first coil 30 as present embodiment, be installed on the camera lens 41 as be installed in the outer of camera lens clamping part 43 and place, and being combined into the interlock body of transitional slide simultaneously with camera lens 41, and another coil keeps motionless as 31 relative fixed of second coil of present embodiment; Again by first coil 30 and second coil, 31 difference input current I1 and I2, make first coil 30 and second coil 31 produce a magnetic field H 1 and H2 respectively, and at each coil 30,31 front and back end 301,302 and 311,312 form N or S magnetic pole respectively, make two coils 30, between 31 adjacent two magnetic poles, between the front end (magnetic pole) 311 as the rear end (magnetic pole) 302 of present embodiment first coil 30 and second coil 31, the magnetic force that generation repels each other or inhales mutually, as present embodiment is the magnetic force that repels each other, and with described magnetic force as driving force, controls lens 41 is shifted in the enterprising line slip of optical axis X to drive also, confession the present invention utilizes the lens shift mechanism 3 applicable camera lens modules 4 at an automatic focusing or zoom of twin coil, to reach the effect of automatic focusing or zoom; Again for the electromagnetic force between two coils 30,31 is increased, the magnetic force direction that can make first coil 30 and second coil 31 is in the same way or oppositely, as N-S or N-N (S-S) or increase coil two ends current i (or increase voltage) or increase coil turn K.

Moreover, for first coil 30 or second coil, the 31 formed magnetic lines of force (magnetic path) can be reached concentrate or intensive effect to promote the stability of the electromagnetic force that produced between two coils 30,31, all or part of of described camera lens clamping part 43 can utilize soft magnetic material (ferrite) to make as clamping part inner ring 431 or outer ring 432; The characteristic that described soft magnetic material has easy magnetization and easily demagnetizes, it is very easy to be magnetized in externally-applied magnetic field, but its induced magnetization also disappears immediately when externally-applied magnetic field disappears, and just soft magnetic material itself does not have the magnetized ability of maintenance; And at present the soft magnetic material Main Ingredients and Appearance can be puron (wrought iron, soft iron), steel, silicon steel, magnesium-zinc alloy (Mg-Zn alloy), nickel zinc alloy (Ni-Zn alloy), MnZn alloy (Mn-Zn alloy) or metallic glass (metallic glass) etc. that carbon content is very low, all can tolerate reflow high temperature; Then behind two coils, 30,31 difference input currents, produce magnetic field between two coils 30,31, can make simultaneously the camera lens clamping part made from soft magnetic material (ferrite) produce induced magnetism, produce stable electromagnetic force (electromagnetic force) of repelling each other or inhaling mutually or the stability of promoting the electromagnetic force that produced between two coils 30,31 can cooperate coil 30,31, carrying out transitional slide stably and effectively to drive camera lens clamping part 43 (being camera lens 41); Described again lens shift mechanism structure that constitutes by the camera lens clamping part made from soft magnetic material and camera lens module also can the high temperature of anti-the reflow, can improve the possibility of mass production.

The present invention utilizes the lens shift mechanism 3 of twin coil can further dispose an elasticity recovery spare (return spring element) 50 on camera lens 41 again, when between two coils 30,31 or the magnetic force between the magnetic pole of the abutting end of two coils 30,31 when disappearing, described elasticity recovery spare 50 can provide a relative restoring force to camera lens 21, just to camera lens 41 provide one with two coils 30,31 between the opposite spring force of magnetic force, in order to camera lens 41 is returned back to the original position before the magneticaction; As for elasticity kenel such as compression (Compression) spring or extension formula (Extension) spring, the number of described elasticity recovery spare 50 or set up position etc. not limit, can need with the design of camera lens module 4 or two coils 30,31 between magnetic force direction change.

The present invention utilizes in the lens shift mechanism 3 of twin coil, the coil winding kenel of two coils 30,31, direction of current and elasticity recovery spare 50 patterns etc. can be made different choice with the need, and therefore lens shift mechanism 3 of the present invention can produce 64 kinds of different composition modes as shown in the following Table I at least:

Table one: 64 kinds of composition modes

First coil or

First coil, second coil, second coil is solid

Form first coil, the second the direction of the winding current direction of current and decide the spring pattern

1 left-handed 1 compression that enters

The 2 left-handed 1 extension formulas that enter

3 left-handed 2 compressions that enter

The 4 left-handed 2 extension formulas that enter

5 left-handed entering are flowed out 1 compression

6 left-handed entering are flowed out 1 extension formula

7 left-handed entering are flowed out 2 compressions

8 left-handed entering are flowed out 2 extension formulas

9 left-handed outflows enter 1 compression

10 left-handed outflows enter 1 extension formula

11 left-handed outflows enter 2 compressions

12 left-handed outflows enter 2 extension formulas

1 compression is flowed out in 13 left-handed outflows

1 extension formula is flowed out in 14 left-handed outflows

2 compressions are flowed out in 15 left-handed outflows

2 extension formulas are flowed out in 16 left-handed outflows

17 left-handed dextrorotation enter 1 compression

18 left-handed dextrorotation enter 1 extension formula

19 left-handed dextrorotation enter 2 compressions

20 left-handed dextrorotation enter 2 extension formulas

21 left-handed dextrorotation enter flows out 1 compression

22 left-handed dextrorotation enter flows out 1 extension formula

23 left-handed dextrorotation enter flows out 2 compressions

24 left-handed dextrorotation enter flows out 2 extension formulas

25 left-handed dextrorotation are flowed out and are entered 1 compression

The 1 extension formula that enters is flowed out in 26 left-handed dextrorotation

27 left-handed dextrorotation are flowed out and are entered 2 compressions

The 2 extension formulas that enter are flowed out in 28 left-handed dextrorotation

1 compression is flowed out in 29 left-handed dextrorotation

1 extension formula is flowed out in 30 left-handed dextrorotation

2 compressions are flowed out in 31 left-handed dextrorotation

2 extension formulas are flowed out in 32 left-handed dextrorotation

Left-handed 1 compression that enters of 33 dextrorotation

The left-handed 1 extension formula that enters of 34 dextrorotation

Left-handed 2 compressions that enter of 35 dextrorotation

The left-handed 2 extension formulas that enter of 36 dextrorotation

Left-handed the entering of 37 dextrorotation flowed out 1 compression

Left-handed the entering of 38 dextrorotation flowed out 1 extension formula

Left-handed the entering of 39 dextrorotation flowed out 2 compressions

Left-handed the entering of 40 dextrorotation flowed out 2 extension formulas

The left-handed outflow of 41 dextrorotation enters 1 compression

The left-handed outflow of 42 dextrorotation enters 1 extension formula

The left-handed outflow of 43 dextrorotation enters 2 compressions

The left-handed outflow of 44 dextrorotation enters 2 extension formulas

1 compression is flowed out in the left-handed outflow of 45 dextrorotation

1 extension formula is flowed out in the left-handed outflow of 46 dextrorotation

2 compressions are flowed out in the left-handed outflow of 47 dextrorotation

2 extension formulas are flowed out in the left-handed outflow of 48 dextrorotation

49 dextrorotation dextrorotation enter 1 compression

50 dextrorotation dextrorotation enter 1 extension formula

51 dextrorotation dextrorotation enter 2 compressions

52 dextrorotation dextrorotation enter 2 extension formulas

53 dextrorotation dextrorotation enter flows out 1 compression

54 dextrorotation dextrorotation enter flows out 1 extension formula

55 dextrorotation dextrorotation enter flows out 2 compressions

56 dextrorotation dextrorotation enter flows out 2 extension formulas

57 dextrorotation dextrorotation are flowed out and are entered 1 compression

The 1 extension formula that enters is flowed out in 58 dextrorotation dextrorotation

59 dextrorotation dextrorotation are flowed out and are entered 2 compressions

The 2 extension formulas that enter are flowed out in 60 dextrorotation dextrorotation

1 compression is flowed out in 61 dextrorotation dextrorotation

1 extension formula is flowed out in 62 dextrorotation dextrorotation

2 compressions are flowed out in 63 dextrorotation dextrorotation

2 extension formulas are flowed out in 64 dextrorotation dextrorotation

Wherein, as first, two coil 30,31 coil winding kenel can be selected left-handed (Left) or dextrorotation (Right) respectively, first, two coil 30,31 direction of current can be selected to enter (Input) respectively or flow out (Output), first, two coil 30,31 set-up mode can be selected one, and another then maintains static in order to be installed on the camera lens clamping part 43 synchronously transitional slide, elasticity recovery spare 50 can be selected compression (Compression) spring or extension formula (Extension) spring, therefore lens shift mechanism 3 of the present invention can produce 64 kinds of different composition modes at least, again wherein, the coil 30/31 that is installed on the camera lens 41 can be arranged within the camera lens clamping part 43 or the outside, and camera lens clamping part 43 can design different structures or use different soft magnetic material (ferrite) again.

Several preferred embodiments in the option table one, explanation as back respectively:

＜the first embodiment〉form for No. 55 in the table one

With reference to figure 3, Fig. 4, in the present embodiment, the coil winding kenel of first coil 30 is dextrorotation (Right), the coil winding kenel of second coil 31 is dextrorotation (Right), the direction of current I1 of first coil 30 is for entering (Input), the direction of current I2 of second coil 31 is for flowing out (Output), and second coil 31 is set at and maintains static, and elasticity recovery spare 50 is compression (Compression) spring; So, the front and back ends 301,302 of first coil 30 forms N, S magnetic pole respectively, and the front and back ends 311,312 of second coil 31 forms S, N magnetic pole respectively, cause between the front end 311 of the rear end 102 of present embodiment first coil 30 and second coil 31 and produce the magnetic force that repels each other, and with described magnetic force as driving force, to drive camera lens 41 (camera lens clamping part 43) in the enterprising line slip displacement of optical axis directions X, to reach the effect of automatic focusing or zoom.

All or part of of described again camera lens clamping part 43 further can utilize soft magnetic material to make as clamping part inner ring 431 or outer ring 432, and the concentration magnetic line of force produces stable electromagnetic force can cooperate first coil 30; Present embodiment camera lens clamping part 43 is to make with nickel zinc alloy, first coil 30 is arranged on camera lens clamping part 43 outsides, produce magnetic field when 30 energisings of first coil, the magnetic line of force in described magnetic field then concentrates on the end face of camera lens clamping part 43, can produce the more stable magneticaction that repels each other to second coil 11, and controls lens 21 is shifted in the enterprising line slip of optical axis directions X to drive also by described magneticaction.

＜the second embodiment〉form for No. 56 in the table one

With reference to figure 5, shown in Figure 6, in the present embodiment, the coil winding kenel of first coil 30 is dextrorotation (Right), the coil winding kenel of second coil 31 is dextrorotation (Right), the direction of current I1 of first coil 30 is for entering (Input), the direction of current I2 of second coil 31 is for flowing out (Output), and second coil 31 is set at and maintains static, and elasticity recovery spare 50 is set at extension formula (Extension) spring; So, the front and back ends 301,302 of first coil 30 forms N, S magnetic pole respectively, and the front and back ends 311,312 of second coil 31 forms S, N magnetic pole respectively, cause between the front end 311 of the rear end 302 of present embodiment first coil 30 and second coil 31 and produce the magnetic force that repels each other, and with described magnetic force as driving force, controls lens 21 is shifted in the enterprising line slip of optical axis directions X to drive also, to reach the effect of automatic focusing or zoom.

All or part of of described again camera lens clamping part 43 is as clamping part inner ring 431 or outer ring 432, further can utilize soft magnetic material to make, present embodiment is to make with nickel zinc alloy, first coil 30 is arranged on the outside of camera lens clamping part 43, when producing magnetic field when 30 energisings of first coil, the magnetic line of force in described magnetic field then concentrates on the end face of camera lens clamping part 43, can produce the more stable magneticaction that repels each other to second coil 31, and by described magneticaction as driving force with drive and controls lens 41 in the enterprising line slip displacement of optical axis directions X, to reach the effect of automatic focusing or zoom.

＜the three embodiment〉form for No. 50 in the table one

With reference to figure 7, shown in Figure 8, in the present embodiment, the coil winding kenel of first coil 30 is dextrorotation (Right), the coil winding kenel of second coil 31 is dextrorotation (Right), the direction of current I1 of first coil 30 is for entering (Input), the direction of current I2 of second coil 31 is for entering (Input), and first coil 30 is set at and maintains static, and elasticity recovery spare 50 is set at extension formula (Extension) spring; So, the front and back ends 301,302 of first coil 30 forms N, S magnetic pole respectively, and the front and back ends 311,312 of second coil 31 forms N, S magnetic pole respectively, produce between the rear end 302 that causes present embodiment first coil 30 and the front end 311 of second coil 31 and inhale magneticaction mutually, and by described magneticaction as driving force with drive and controls lens 41 in the enterprising line slip displacement of optical axis directions X, to reach the effect of automatic focusing or zoom.

All or part of of described again camera lens clamping part 43 is as clamping part inner ring 431 or outer ring 432, further can utilize soft magnetic material to make, present embodiment is to make with nickel zinc alloy, second coil 31 is arranged on the outside of camera lens clamping part 43, produce magnetic field when 31 energisings of second coil, the magnetic line of force in described magnetic field then concentrates on the end face of camera lens clamping part 43, can produce the more stable magneticaction of suction mutually to first coil 30, and by described magneticaction as driving force with drive and controls lens 41 in the enterprising line slip displacement of optical axis directions X, to reach the effect of automatic focusing or zoom.

＜the four embodiment〉form for No. 49 in the table one

With reference to figure 9, shown in Figure 10, in the present embodiment, the coil winding kenel of first coil 30 is dextrorotation (Right), the coil winding kenel of second coil 31 is dextrorotation (Right), the direction of current I1 of first coil 30 is for entering (Input), the direction of current I2 of second coil 31 is for entering (Input), and first coil 30 maintains static for setting, and elasticity recovery spare 50 is set at compression (Compression) spring; Therefore, the front and back ends 301,302 of first coil 30 forms N, S magnetic pole respectively, and a front and back ends 311,312 of second coil 31 forms N, S magnetic pole respectively, produce between the rear end 302 that causes present embodiment first coil 30 and the front end 311 of second coil 31 and inhale magneticaction mutually, and by described magneticaction as driving force with drive and controls lens 41 in the enterprising line slip displacement of optical axis X, to reach the effect of automatic focusing or zoom.

All or part of of described again camera lens clamping part 43 is as clamping part inner ring 431 or outer ring 432, further can utilize soft magnetic material to make, present embodiment is to make with nickel zinc alloy, second coil 31 is arranged on the outside of camera lens clamping part 43, produce magnetic field when 31 energisings of second coil, the magnetic line of force in described magnetic field then concentrates on the end face of camera lens clamping part 43, can produce the more stable magneticaction of suction mutually to second coil 11, and by described magneticaction as driving force with drive and controls lens 41 in the enterprising line slip displacement of optical axis directions X, to reach the effect of automatic focusing or zoom.

The direction of current of above-mentioned first and second coil 30,31 is selected to enter (Input) as the direction of current of first coil 30 or flows out (Output) to select to enter (Input) or flow out relevant conduction connected modes such as (Output) with the direction of current of second coil 31, all can reach by the design of electronic circuit, because described electronic circuit is not the main composition assembly that belongs to lens shift mechanism 3 of the present invention, also non-feature of the present invention place, and utilize present electronic correlation technology can reach its purpose of design, so not in this narration in detail again.In addition,, also can derive by the actual sample test for the structural design of camera lens clamping part 43 or the electromagnetic force stable situation of selecting for use different permeability magnetic material to cause, and non-feature of the present invention place, so not in this narration in detail again.

Structural design of the present invention can have following advantage compared with the prior art at least:

＜1 〉, the lens shift mechanism 3 of twin coil of the present invention must not utilize other magnet be arranged on the peripheral of coil or in enclose to cooperate coil to use, at least can save the magnet member and set up the position, can simplify the structure of lens shift mechanism relatively, meet camera lens module miniaturization and the designing requirement that reduces cost, help mass production.

＜2 〉, the lens shift mechanism 3 of twin coil of the present invention is because of using magnet, can anti-reflow (reflow) high temperature, can improve the possibility of mass production.

＜3 〉, all or part of of camera lens clamping part 43 of the present invention is as clamping part inner ring 431 or outer ring 432, can utilize soft magnetic material (ferrite) to make, but promote the stability of the electromagnetic force that produced between the two coil with the concentration magnetic line of force, help driving and controls lens 41 and on the optical axis directions X, stablize transitional slide; And the described camera lens clamping part 43 that includes soft magnetic material can anti-reflow (reflow) high temperature, does not influence the volume production amount.

The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive; Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalent transformation, but all will fall within the scope of protection of the present invention.

Claims (9)

1. lens shift mechanism that utilizes twin coil, it is to be useful in one to focus automatically or zoom lens module, described camera lens module comprises a cavity volume, a camera lens and a lens shift mechanism at least, wherein said camera lens is to comprise an eyeglass group and a camera lens clamping part and be set in the described cavity volume, and on optical axis towards near or away from the direction transitional slide of thing; It is characterized in that: described lens shift mechanism is to constitute by arranging before and after one first coil and one second coil, and make a coil wherein be installed in the peripheral of camera lens and be combined into the camera lens interlock body of a synchronous transitional slide with camera lens, another coil then relative fixed keeps motionless, behind described first coil and second coil difference input current, produce the magnetic force that repels each other or inhale mutually between two coils and be shifted in the enterprising line slip of optical axis direction to drive camera lens interlock body.

2. according to the described lens shift mechanism that utilizes twin coil of claim 1, it is characterized in that: the coil winding kenel of described first coil is left-handed or dextrorotation.

3. according to the described lens shift mechanism that utilizes twin coil of claim 1, it is characterized in that: the coil winding kenel of described second coil is left-handed or dextrorotation.

4. according to the described lens shift mechanism that utilizes twin coil of claim 1, it is characterized in that: it is peripheral and be combined into the interlock body of a synchronous transitional slide with camera lens that described first coil is installed in camera lens, and described second coil is for maintaining static.

5. according to the described lens shift mechanism that utilizes twin coil of claim 1, it is characterized in that: it is peripheral and be combined into the interlock body of transitional slide simultaneously with camera lens that described second coil is installed in camera lens, and described first coil is for maintaining static.

6. according to the described lens shift mechanism that utilizes twin coil of claim 1, it is characterized in that: all or part of of described camera lens clamping part made by soft magnetic material, described soft magnetic material is a puron, the steel that carbon content is very low, silicon steel, magnesium-zinc alloy, nickel zinc alloy, the MnZn alloy is with wherein a kind of in the metallic glass.

7. according to the described lens shift mechanism that utilizes twin coil of claim 6, it is characterized in that: the part of described camera lens clamping part comprises: the outer ring part of the inner round portion of camera lens clamping part or camera lens clamping part.

8. according to the described lens shift mechanism that utilizes twin coil of claim 1, it is characterized in that: configuration one elasticity recovery spare on described camera lens, when the magnetic force between described first coil and second coil disappears, described elasticity recovery spare to camera lens provide one with the reverse restoring force of magneticaction so that described camera lens returns back to original position.

9. the described according to Claim 8 lens shift mechanism that utilizes twin coil is characterized in that: described elasticity recovery spare is compression spring or the formula of extension spring.

Images