CN201181357Y - Lens driving device utilizing electromagnetic propulsion - Google Patents
Lens driving device utilizing electromagnetic propulsion Download PDFInfo
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- CN201181357Y CN201181357Y CNU2008201069517U CN200820106951U CN201181357Y CN 201181357 Y CN201181357 Y CN 201181357Y CN U2008201069517 U CNU2008201069517 U CN U2008201069517U CN 200820106951 U CN200820106951 U CN 200820106951U CN 201181357 Y CN201181357 Y CN 201181357Y
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Abstract
The utility model relates to a lens driving device using electromagnetic thrust force, which comprises a frame, a sleeve, a lens holding portion, a lens, a push plate, a plurality of electromagnets and an elastic element. The sleeve is combined and fixed with the frame to ensure that the sleeve can rotate on the frame, the sleeve is provided with a first push mechanism, and the lens holding portion is provided with a second push mechanism and connected with the sleeve via the second push mechanism and the first push mechanism. The lens is combined and fixed inside the lens holding portion, the push plate is positioned on the outer wall of the sleeve, the electromagnets are respectively arranged on the frame and the push plate, and the elastic element is connected with the sleeve and the frame. The sleeve is pushed to rotate by using the repulsion force or attraction force formed by the magnetic field generated due to power-on of the electromagnets, and the second push mechanism is actuated by the first push mechanism to drive the lens holding portion to move between a first position and a second position. The lens driving device is favorable for the miniaturization and simplification of the lens module and can increase the possibility of industrial production.
Description
Technical field
The utility model relates to a kind of lens driving apparatus that uses electromagnetic push, is applied to the automatic lens group of focusing or zoom, particularly relates to a kind of electromagnet that utilizes and produces thrust, drives with raising mechanism and controls lens is carried out transitional slide by thrust.
Background technology
Automatic focusing or zoom lens module that digital camera uses, because the space is limited, its device must meet gently, approach, short and small condition, necessary again precision is durable.Traditional automatic focusing or zoom lens module use voice coil motor (VCM), piezo-electric motor or coil electromagnetism power to drive the mirror group mostly, as U.S. Pat 7,295,388, US6,654,185, US7,298,562, it uses the plurality of electromagnetic body to come the displacement of the different directions of controls lens respectively; Or as U.S. Pat 2007/0097532, US2004/0130808, it makes coil produce different magnetic field by control input coil sense of current, and then produces suction or repulsion comes moving lens with magnetic element on the lens housing; Or as using voice coil motor (voice coil motor is called for short VCM), it utilizes coil, magnet, cooperates formation with elastic component (as spring or shell fragment), as U.S. Pat 7,262,927, US7,196,978, US7,002,879, US6,961,090, US6,687,062, US2007/0133110, Jap.P. JP2005-037865, JP2005-258355, WO2007/026830 etc.; Or as using the formed piezo-electric motor of piezoelectric (piezoelectric motor) to come the displacement of controls lens, as U.S. Pat 2007/0146894, US7,212,358, US2003/0227560, Jap.P. JP2006-293083, JP2006-101611 etc.
As shown in Figure 1, on the support body 100 of this conventional lenses module, four permanent magnet 103-106 are set form a magnetic field, sleeve 107 is arranged on the support body 100, and eyeglass 101 is in conjunction with being fixed in coil 102, and this coil 102 is positioned at sleeve 107.After making coil 102 energising, producing magnetic field, and the electromagnetic force that forms up or down between the magnetic direction that can and be set up by four permanent magnet 103-106 and the magnetic pole moves with the driving camera lens.Yet permanent magnet 103--106 (about 260 ℃) when reflow high temperature will make the magnet demagnetization.Therefore above-mentioned commonly use in the drive unit of coil electromagnetism power and permanent magnet neither reflow (reflow) mode of using when the assembling, cause on volume production efficient and be restricted.
Moreover, having a kind of is to utilize marmem (shaped memory alloy, abbreviation SMA) lens shift mechanism, its cold characteristic that rises of pyrocondensation of utilizing SMA is with the drive force source as detent (actuator), as U.S. Pat 6,307,678, US 6,449,434, US2007/0058070, US2007/0047938, Jap.P. JP2005-275270, JP2005-195998 etc., yet, the cold action of rising of SMA pyrocondensation is slower, can't simple and easyly reach the effect of instant focusing automatically or zoom.
Because every problem of existing prior art, in order to take into account solution, the utility model people proposes a kind of lens driving apparatus that uses electromagnet to produce thrust, with implementation and the foundation as the above-mentioned shortcoming of improvement based on research and development and many practical experience for many years.
Summary of the invention
The purpose of this utility model is, overcome the defective that existing camera lens module exists, and provide a kind of lens driving apparatus of novel utilization electromagnetic push, technical matters to be solved be make its camera lens module that solves the labyrinth of existing prior art be difficult for miniaturization, simplification, with the shortcoming that can't use the reflow assembling, be very suitable for practicality.
The purpose of this utility model and solve its technical matters and realize by the following technical solutions.According to the lens shift mechanism of the utilization electromagnetic push that the utility model proposes, be applicable to that one focuses or the zoom lens module automatically, comprising: a support body; One sleeve combines fixingly with this support body, so that this sleeve can rotate on this support body, and this sleeve has one first and raises mechanism; One eyeglass clamping part has one second and raises mechanism, and second raises that mechanism and this first raises mechanism and this sleeve is connected by this, and this eyeglass clamping part can be along the central axis direction displacement of this camera lens; One eyeglass is in conjunction with being fixed in this eyeglass clamping part; One push pedal is positioned at the outer wall of this sleeve; A plurality of electromagnet are arranged at this support body and this push pedal respectively; And a flexible member, connect this sleeve and this support body; Wherein, repulsion that produces by electromagnet electromagnetic field each other after those electromagnet energisings or suction promote this push pedal rotates this sleeve, and first raise mechanism action this second raises mechanism to drive this eyeglass clamping part by this, make this eyeglass clamping part be moved to a second place from a primary importance, and when stopping those electromagnet energisings, producing a restoring force by this flexible member rotates this sleeve, and first raise mechanism action this second raise mechanism and drive this eyeglass clamping part by this, make this eyeglass clamping part from this second site reversion to this primary importance.
The purpose of this utility model and solve its technical matters and also can be applied to the following technical measures to achieve further.
The lens driving apparatus of aforesaid utilization electromagnetic push, wherein said first to raise mechanism be a sliding-rail groove, second to raise mechanism be a fixed leg for this, and this fixed leg is arranged in this sliding-rail groove and can moves in this sliding-rail groove.
The lens driving apparatus of aforesaid utilization electromagnetic push, wherein said first to raise mechanism be a bush whorl tangent plane, and this second to raise mechanism be a clamping part screw thread tangent plane, and this bush whorl tangent plane and this clamping part screw thread tangent plane are complementary, make when this eyeglass clamping part during in this primary importance, this bush whorl tangent plane and this clamping part screw thread are fitted, and this eyeglass clamping part has a groove, this support body has a corresponding guidance device, this guidance device combines with this groove and makes this eyeglass clamping part not rotate, and then the eyeglass clamping part is moved along the optical center direction of principal axis.
The lens driving apparatus of aforesaid utilization electromagnetic push, wherein said first to raise mechanism be one first screw thread, second to raise mechanism be one second screw thread for this, and this first screw thread and this second screw thread are complementary, and this eyeglass clamping part and this sleeve are connected by this first screw thread and this second screw-threaded engagement, make when this eyeglass clamping part during in this primary importance, this bush whorl tangent plane and this clamping part screw thread are fitted, and this eyeglass clamping part has a groove, and this support body has a corresponding guidance device, this guidance device combines with this groove and makes this eyeglass clamping part not rotate, and then the eyeglass clamping part is moved along the optical center direction of principal axis.
The lens driving apparatus of aforesaid utilization electromagnetic push, wherein said flexible member are connected in this support body and this push pedal.
The lens driving apparatus of aforesaid utilization electromagnetic push, wherein said flexible member are a compression spring or the formula of extension spring.
The utility model compared with prior art has tangible advantage and beneficial effect.As known from the above, for achieving the above object, the utility model provides a kind of lens shift mechanism that uses electromagnetic push, and it is applicable to that one focuses or the zoom lens module automatically.This lens shift mechanism comprises a support body, a sleeve, an eyeglass clamping part, an eyeglass, a push pedal, a plurality of electromagnet and a flexible member.Sleeve combines fixing with support body, so that sleeve can rotate on support body, and sleeve has one first and raises mechanism.Eyeglass is in conjunction with being fixed in the eyeglass clamping part, and the eyeglass clamping part has one second and raises mechanism, and raises by second that mechanism and first raises mechanism and sleeve is connected, and can make the central axis direction displacement of eyeglass clamping part along camera lens.Wherein, push pedal is positioned at that the outer wall of sleeve, a plurality of electromagnet are arranged at respectively in support body and the push pedal and flexible member connects support body and sleeve.After the electromagnet energising, can produce an electromagnetic field, repulsion or suction by electromagnet electromagnetic field generation each other, make push pedal and sleeve move, and raise mechanism action second by first and raise mechanism to drive the eyeglass clamping part, make the eyeglass clamping part be moved to a second place from a primary importance along central shaft, and when stopping electromagnet being powered, flexible member produces a restoring force rotates sleeve, and raise mechanism action second by first and raise mechanism and drive the eyeglass clamping part, make the eyeglass clamping part along central shaft from second site reversion to primary importance.Wherein, two electromagnet can establishing opposite face pass to the different directions electric current, and the magnetic field that makes the electromagnet end face produce equidirectional is the thrust of repulsion, rotate to promote sleeve.Wherein, first raises the combination that mechanism and second combination that raises mechanism are preferably a sliding-rail groove and a fixed leg, and fixed leg is arranged in the sliding-rail groove and can moves in sliding-rail groove.Wherein, first raises the combination that mechanism and second combination that raises mechanism are preferably a bush whorl tangent plane and an eyeglass clamping part screw thread tangent plane, and bush whorl tangent plane and clamping part screw thread tangent plane are complementary, when eyeglass retaining part during in primary importance, bush whorl tangent plane and clamping part screw thread are fitted.Wherein, first raise mechanism and second raise mechanism be preferably one first screw thread be arranged at sleeve inboard with another with second screw thread that matches be arranged at the outer wall of eyeglass clamping part, and eyeglass clamping part and sleeve are connected by screw-threaded engagement each other.Wherein, flexible member can be compression spring or the formula of extension spring, and can be arranged between push pedal and the support body, maybe can be arranged between sleeve and the support body, to produce a restoring force.Wherein, flexible member also can be connected between push pedal and the support body.
By technique scheme, the lens driving apparatus of the utility model utilization electromagnetic push has following advantage and beneficial effect at least:
(1) simple structure of this lens driving apparatus is made easily, helps the lifting of production reliability, can prolong the serviceable life of product.
(2) this lens driving apparatus can use reflow because of not containing permanent magnet, improves the possibility of volume production.
(3) this lens driving apparatus may command eyeglass clamping part is done fast and is moved, to reach the purpose of fast zoom or fast automatic zoom.
(4) controlling mechanism of this lens shift mechanism is simpler, and it is simple, with low cost to make assembling.
In sum, the utlity model has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on apparatus structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing camera lens module has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the synoptic diagram of existing prior art.
Fig. 2 is the stereographic map of first embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.
The sectional view of first embodiment of the lens driving apparatus of the utilization electromagnetic push of the present utility model that Fig. 3 is.
Fig. 4 is the vertical view of first embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.
Fig. 5 is that eyeglass retaining part shown in Figure 2 is in the stereographic map of the second place.
Fig. 6 is that eyeglass retaining part shown in Figure 2 is in the sectional view of the second place.
Fig. 7 is the three-dimensional exploded view of second embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.
Fig. 8 is the three-dimensional combination figure of second embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.
Fig. 9 is the action diagram of second embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.
Figure 10 is the three-dimensional combination figure of the 3rd embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.
Figure 11 is the action diagram of the 3rd embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.
100,201: support body
101,204: eyeglass
102: coil
103-106: permanent magnet
107,202: sleeve
203: the eyeglass clamping part
205: push pedal
206: flexible member
2071,2072: electromagnet
208: sliding-rail groove
209: fixed leg
401: the bush whorl tangent plane
402: clamping part screw thread tangent plane
403,601: groove
602: male thread
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of lens driving apparatus, structure, feature and effect thereof according to the utilization electromagnetic push that the utility model proposes, describe in detail as after.
The following embodiment that is disclosed of the utility model, be to explain at the main composition element of the lens driving apparatus of the utility model utilization electromagnetic push, though therefore the following embodiment that is disclosed of the utility model is 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 the lens driving apparatus of the utilization electromagnetic push that the utility model disclosed, other structures are the technology of General Notifications, therefore the personage who generally is familiar with this skill in this field understands, the composed component that the utility model discloses automatic focusing or zoom lens module is not restricted to the following example structure that discloses, just each composed component of focusing or zoom lens module is to carry out many changes automatically, revise, even the equivalence change, for example: support body in this camera lens module, the shaped design of sleeve 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, eyeglass clamping part and a sleeve do not limit yet, can comprise the eyeglass that constitutes by single eyeglass or several eyeglasses as this eyeglass, and eyeglass can be spoken for sb. beforehand generally and is located in the eyeglass clamping part and combines with a sleeve and form a camera lens; Or other coil turn (turn) number of the utility model electromagnet group, internal coil diameter (or internal coil diameter sectional area), electromagnet current turnover direction and size etc. also do not limit, and can calculate according to electromagnetic force theorem and relevant ampere right-hand law, as following formula (1) and formula (2)
Wherein, B is magnetic density (Guass), μ
0Be space permeability (permeability), r is the electromagnet core magnetoconductivity, I is coil current (Amp), N/L is the coil turn of electromagnet unit length, and k is a constant, and m1, m2 are respectively the magnetic flux (unit is maxwell) of two electromagnet, and m1 (m2) can calculate for the magnetic density of electromagnet multiply by electromagnet core face area (cm2), r is the distance of two electromagnet core end faces, and F is suction or repulsion size, and F is that suction or repulsion are determined by direction of current then.Can be calculated the magnetic density of the utility model two electromagnet (2071/2072) respectively and be calculated F suction or repulsion size and direction by formula (1) and formula (2), the weight of using the cooperation camera lens is with the designing optimal driving force.
Hereinafter with reference to relevant indicators, the lens driving apparatus according to the utilization electromagnetic push of the utility model embodiment is described, to be convenient to understand for making, the similar elements among the following embodiment illustrates with identical symbology.
See also Fig. 2 to Fig. 4, it is respectively stereographic map, sectional view and the vertical view of first embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model, at present embodiment, first to raise mechanism be that a sliding-rail groove 208, the second raises the combination that mechanism is a fixed leg 209.In Fig. 2, lens driving apparatus comprises a support body (frame) 201, a sleeve (barrel) 202, an eyeglass clamping part (lens holder) 203, one eyeglass (lens) 204, a push pedal (kicker) 205, a flexible member (spring element) 206 and a plurality of electromagnet (electromagnet parts) 2071,2072.Eyeglass 204 combines fixing with eyeglass clamping part 203, and along with eyeglass clamping part 203 moves.Push pedal 205 is arranged at sleeve 202 outer walls and fixing with sleeve 202, and electromagnet 2072 combines with push pedal 205, and electromagnet 2071 is arranged on the support body 201, and the two ends of flexible member 206 link push pedal 205 and support body 201.Sleeve 202 combines fixing with support body 201, can rotate on support body 201.Eyeglass clamping part 203 has a fixed leg 209, and sleeve 202 has a sliding-rail groove 208, and the central axis direction of the track of sliding-rail groove 208 and sleeve 202 has an angle.When eyeglass clamping part 203 is arranged in the sleeve 202, when fixed leg 209 was arranged in sliding-rail groove 208, then eyeglass clamping part 203 and sleeve 202 can be by fixed leg 209 and sliding-rail grooves 208 and are combined.
Please continue and consult Fig. 5 and Fig. 6, stereographic map and sectional view that its first embodiment that is respectively the lens driving apparatus of utilization electromagnetic push of the present utility model moves.Electromagnet 2071 and 2072 is disposed with opposite face, when electromagnet 2071 passes to counterclockwise direction of current, be that the electric current positive pole enters electromagnet, according to Ampere's right-handed screw rule, electromagnet 2071 is the N utmost point at the magnetic direction of end face, when electromagnet 2072 passes to clockwise direction of current, electromagnet 2072 is the N utmost point at the magnetic direction of electromagnet 2071 opposing end surfaces, thus, the magnetic field that two electromagnet 2071 and 2072 end faces produce equidirectional forms repulsion, because sleeve 202 can rotate on support body 201, so this repulsion forces push pedal 205 away from electromagnet 2071 and then sleeve 202 is rotated.Because fixed leg 209 is arranged in the sliding-rail groove 208, prolonging sliding-rail groove 208 and move so when sleeve 202 is rotated, also drive fixed leg 209, and then drive eyeglass clamping part 203 is rotated displacement in the central axis direction of sleeve 202.With Fig. 5 is example, and when sleeve 202 rotates toward the right, then fixed leg 209 is forced to rotation and rises, and when sleeve 202 rotates toward the left sides, then fixed leg 209 is forced to rotation and descends, and can make eyeglass clamping part 203 be rotated displacement along central axis direction.
Because the two ends of flexible member 206 link push pedal 205 and support body 201, so when push pedal 205 during away from electromagnet 2071, also be expressed to flexible member 206 and make flexible member 206 produce restoring force, and the angle of rotating along with sleeve 202 is big more, it is high more and restoring force is big more that flexible member 206 is extruded degree, equate that with the answer intensity of force eyeglass clamping part 203 just stops operating up to repulsion.Fig. 5 compares with Fig. 2, and when the fixed leg 209 shown in Figure 5 and the position of eyeglass clamping part 203 were higher than position shown in Figure 2, flexible member 206 was squeezed and is out of shape.When stopping that electromagnet 2071-2072 is switched on, then the repulsion between the electromagnet 2071 and 2072 disappears, the restoring force of flexible member 206 provides a spring force opposite with above-mentioned repulsion to push pedal 205, force push pedal 205 away from support body 201, the related sleeve 202 that makes is toward back rotation, restore to the original state up to flexible member 206, eyeglass clamping part 203 just stops operating.In eyeglass clamping part 203 rotation processes, fixed leg 209 to lower slider, makes eyeglass clamping part 203 get back to position shown in Figure 2 along sliding-rail groove 208.
Wherein, the angle of the central axis direction of the trajectory shape of sliding-rail groove 208, length and sleeve 202 can change along with application need.For example, if the track of the track of sliding-rail groove 208 is a straight line, then moving axially with sleeve 202 rotation arc length (being displaced sideways distance) of eyeglass clamping part 203 followed tan (θ) relation, and θ is the angle of the central axis direction of sliding-rail groove 208 and sleeve 202.
In the present embodiment, 2071-2072 imposes size of current for electromagnet, cooperates flexible member 206 and sleeve 202 torques, and can calculate the displacement d of eyeglass clamping part 203, or can learn by experiment at central shaft, as table one:
Table one Current Control eyeglass displacement
See also Fig. 7 to Fig. 9, it is respectively three-dimensional exploded view, three-dimensional combination figure and the action diagram of second embodiment of the lens driving apparatus of utilization electromagnetic push of the present utility model.In the present embodiment, first to raise mechanism be a bush whorl tangent plane 401, second raises the combination that mechanism is a clamping part screw thread tangent plane 402, second embodiment is different with first embodiment to be: sleeve 202 has a bush whorl tangent plane 401, eyeglass clamping part 203 has a clamping part screw thread tangent plane 402, and bush whorl tangent plane 401 fits with clamping part screw thread tangent plane 402, cause eyeglass clamping part 203 and sleeve 202 to be connected, and eyeglass clamping part 203 and support body 201 have a groove 403 and a guidance device (not being illustrated among the figure) respectively, groove 403 combines with guidance device eyeglass clamping part 203 can not be rotated, and only can be along the central axis direction displacement of sleeve 202, as shown in Figure 8.Fig. 8 is the state of lens driving apparatus when electromagnet 2071-2072 does not switch on.Produce a repulsion between the electromagnet 2071-2072 when electromagnet 2071-2072 energising makes, this repulsion forces push pedal 205 away from electromagnet 2071, and the related sleeve 202 that makes rotates.As shown in Figure 9, when sleeve 202 rotated, bush whorl tangent plane 401 promoted clamping part screw thread tangent plane 402, and then drove eyeglass clamping part 203 to top offset one displacement d.
At present embodiment, flexible member 206 is linked between sleeve 202 and the support body 201 (not being plotted in Fig. 7 to Fig. 9), after stopping to electromagnet 2071-2072 energising, repulsion disappears, then the restoring force of flexible member 206 forces sleeve 202 toward revolution, eyeglass clamping part 203 is returned to previous status by this, as shown in Figure 8.
See also Figure 10 and Figure 11, it is respectively three-dimensional combination figure and the action diagram of the 3rd embodiment of lens driving apparatus of the present utility model, in the present embodiment, first to raise mechanism be that one first screw thread (present embodiment use male thread) is arranged at the sleeve inboard, and second to raise mechanism be the outer wall that one second screw thread (present embodiment use box thread) is arranged at the eyeglass clamping part.The 3rd embodiment is different with the foregoing description to be: the outer wall of eyeglass clamping part 203 has a male thread 602, the inboard of sleeve 202 has a box thread (not shown), eyeglass clamping part 203 is arranged in the sleeve 202, and be meshed with box thread and combine with sleeve 202 by male thread 602, and eyeglass clamping part 203 and support body 201 have a groove 601 and a guidance device (not being illustrated among the figure) respectively, because groove 601 combines with guidance device eyeglass clamping part 203 can not be rotated, and only can be along central shaft (with the central shaft of camera lens) the direction displacement of sleeve 202.The state that Figure 10 does not switch in electromagnet 2071-2072 for lens driving apparatus.
When electromagnet 2071-2072 is passed to the electric current of different directions as mentioned above, produce a repulsion between the electromagnet 2071-2072, this repulsion forces push pedal 205 away from electromagnet 2071, and then drives sleeve 202 rotations.Because groove 601 combines with guidance device on the support body 201, the central axis direction that makes eyeglass clamping part 203 can only prolong sleeve 202 moves, and can not rotate, therefore, when sleeve 202 rotated, box thread promoted male thread 602, and then eyeglass clamping part 203 is moved up, as shown in figure 11, because the relation that eyeglass clamping part 203 moves up makes that partly male thread 602 reveals.
At present embodiment, flexible member 206 is linked between sleeve 202 and the support body 201 (not being plotted in Figure 10 and Figure 11), after stopping to electromagnet 2071-2072 power supply, repulsion disappears, then the restoring force of flexible member 206 forces sleeve 202 toward revolution, make eyeglass clamping part 203 be returned to previous status by this, as shown in figure 10.Wherein, male thread 602 is not limited to be arranged on the outer wall of eyeglass clamping part 203, also can be arranged at the inboard of sleeve 202, and box thread then is arranged at the outer wall of eyeglass clamping part 203.Everyly allow screw thread that eyeglass clamping part 203 is meshed with sleeve 202 all in protection domain of the present utility model.
Sleeve in above-mentioned three embodiment all has one first and raises mechanism, and the eyeglass clamping part all has one second and raises mechanism, and the eyeglass clamping part raises by second, and mechanism and first raises mechanism and sleeve is connected.In first embodiment, first to raise mechanism be sliding-rail groove 208, and second to raise mechanism be fixed leg 209; And in a second embodiment, first to raise mechanism be a bush whorl tangent plane 401, and second to raise mechanism be a clamping part screw thread tangent plane 402; In the 3rd embodiment, first to raise mechanism be one first screw thread (as male thread 602), and second to raise mechanism be one second screw thread (as box thread).And the foregoing description is only for for example, but not as limit, and any rotation that allows sleeve can drive mechanism that the eyeglass clamping part moves all in protection domain of the present utility model.
In addition; above-mentioned three embodiment produce the action that repulsion illustrates lens driving apparatus of the present utility model as an example with electromagnet 2071-2072 energising; but not as limit; every electromagnetic field that utilizes a plurality of electromagnet energisings to be produced; by the direction of electromagnetic field to each other and produce repulsion or suction; make sleeve come back rotation with the restoring force of flexible member; and then drive the lens driving apparatus that the eyeglass clamping part moves between the primary importance and the second place, all in protection domain of the present utility model.In the explanation of the foregoing description, Fig. 2 is the state of eyeglass clamping part in primary importance, and Fig. 5 is the state of eyeglass clamping part in the second place.Fig. 8 is the state of eyeglass clamping part in primary importance, and Fig. 9 is the state of eyeglass clamping part in the second place, and Figure 10 is the state of eyeglass clamping part in primary importance, and Figure 11 is the state of eyeglass clamping part in the second place.
And the electromagnetic core of electromagnet 2071-2072 can utilize soft magnetic material (soft magnet) to make; The characteristic that this soft magnetic material has easy magnetization and easily demagnetizes, it is very easy to be magnetized in electromagnet energising back, the magnetic line of force can be concentrated on the electromagnetic core end face, but when the electromagnet no power, the magnetic force of electromagnetic core also disappears immediately, 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, iron-nickel alloy (Fe-Ni Alloy or Permalloys), 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, lens driving apparatus of the present utility model all can tolerate reflow high temperature, so can have higher volume production efficient.And the elasticity kenel of flexible member can be a compression (compression) spring or extension formula (extension) spring, and structure kenel such as coil spring or non-coil spring, number or set up position etc. not limit can need with the design of lens driving apparatus or feed the current of electromagnet direction to change.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (6)
1. a lens shift mechanism that uses electromagnetic push is applicable to that one focuses or the zoom lens module automatically, it is characterized in that this lens shift mechanism comprises:
One support body;
One sleeve combines fixingly with this support body, so that this sleeve can rotate on this support body, and this sleeve has one first and raises mechanism;
One eyeglass clamping part has one second and raises mechanism, and second raises that mechanism and this first raises mechanism and this sleeve is connected by this, and this eyeglass clamping part can be along the central axis direction displacement of this camera lens;
One eyeglass is in conjunction with being fixed in this eyeglass clamping part;
One push pedal is positioned at the outer wall of this sleeve;
A plurality of electromagnet are arranged at this support body and this push pedal respectively; And
One flexible member connects this sleeve and this support body;
Wherein, repulsion that produces by electromagnet electromagnetic field each other after those electromagnet energisings or suction promote this push pedal rotates this sleeve, and first raise mechanism action this second raises mechanism to drive this eyeglass clamping part by this, make this eyeglass clamping part be moved to a second place from a primary importance, and when stopping those electromagnet energisings, producing a restoring force by this flexible member rotates this sleeve, and first raise mechanism action this second raise mechanism and drive this eyeglass clamping part by this, make this eyeglass clamping part from this second site reversion to this primary importance.
2. the lens driving apparatus of utilization electromagnetic push as claimed in claim 1 is characterized in that wherein first to raise mechanism be a sliding-rail groove for this, and second to raise mechanism be a fixed leg for this, and this fixed leg is arranged in this sliding-rail groove and can moves in this sliding-rail groove.
3. the lens driving apparatus of utilization electromagnetic push as claimed in claim 1, it is characterized in that wherein first to raise mechanism be a bush whorl tangent plane for this, and this second to raise mechanism be a clamping part screw thread tangent plane, and this bush whorl tangent plane and this clamping part screw thread tangent plane are complementary, make when this eyeglass clamping part during in this primary importance, this bush whorl tangent plane and this clamping part screw thread are fitted, and this eyeglass clamping part has a groove, this support body has a corresponding guidance device, this guidance device combines with this groove and makes this eyeglass clamping part not rotate, and then the eyeglass clamping part is moved along the optical center direction of principal axis.
4. the lens driving apparatus of utilization electromagnetic push as claimed in claim 1, it is characterized in that wherein first to raise mechanism be one first screw thread for this, second to raise mechanism be one second screw thread for this, and this first screw thread and this second screw thread are complementary, and this eyeglass clamping part and this sleeve are connected by this first screw thread and this second screw-threaded engagement, make when this eyeglass clamping part during in this primary importance, this bush whorl tangent plane and this clamping part screw thread are fitted, and this eyeglass clamping part has a groove, and this support body has a corresponding guidance device, this guidance device combines with this groove and makes this eyeglass clamping part not rotate, and then the eyeglass clamping part is moved along the optical center direction of principal axis.
5. the lens driving apparatus of utilization electromagnetic push as claimed in claim 1 is characterized in that wherein this flexible member is connected in this support body and this push pedal.
6. the lens driving apparatus of utilization electromagnetic push as claimed in claim 1 is characterized in that wherein this flexible member is a compression spring or the formula of extension spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201069517U CN201181357Y (en) | 2008-04-10 | 2008-04-10 | Lens driving device utilizing electromagnetic propulsion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201069517U CN201181357Y (en) | 2008-04-10 | 2008-04-10 | Lens driving device utilizing electromagnetic propulsion |
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| Publication Number | Publication Date |
|---|---|
| CN201181357Y true CN201181357Y (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201069517U Expired - Fee Related CN201181357Y (en) | 2008-04-10 | 2008-04-10 | Lens driving device utilizing electromagnetic propulsion |
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| Country | Link |
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| CN (1) | CN201181357Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556367B (en) * | 2008-04-10 | 2011-04-20 | 一品光学工业股份有限公司 | Lens driving device applying electromagnetic thrust force |
| CN103676069A (en) * | 2012-09-20 | 2014-03-26 | 华晶科技股份有限公司 | Lens actuating device and lens actuating method thereof |
| CN104678678A (en) * | 2015-03-30 | 2015-06-03 | 信利光电股份有限公司 | Shooting device and auto-focusing module thereof |
-
2008
- 2008-04-10 CN CNU2008201069517U patent/CN201181357Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556367B (en) * | 2008-04-10 | 2011-04-20 | 一品光学工业股份有限公司 | Lens driving device applying electromagnetic thrust force |
| CN103676069A (en) * | 2012-09-20 | 2014-03-26 | 华晶科技股份有限公司 | Lens actuating device and lens actuating method thereof |
| CN103676069B (en) * | 2012-09-20 | 2015-12-16 | 华晶科技股份有限公司 | Lens actuating device and camera lens actuating method thereof |
| CN104678678A (en) * | 2015-03-30 | 2015-06-03 | 信利光电股份有限公司 | Shooting device and auto-focusing module thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20110410 |