CN201177681Y - Camera driving apparatus having magnetic pre-pressing function - Google Patents
Camera driving apparatus having magnetic pre-pressing function Download PDFInfo
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- CN201177681Y CN201177681Y CNU2007201525229U CN200720152522U CN201177681Y CN 201177681 Y CN201177681 Y CN 201177681Y CN U2007201525229 U CNU2007201525229 U CN U2007201525229U CN 200720152522 U CN200720152522 U CN 200720152522U CN 201177681 Y CN201177681 Y CN 201177681Y
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Abstract
A lens drive device with magnetic pre-pressing function comprises a moving member, a fixed member and a connection device. A first magnet assembly is arranged on the moving member; the fixed member has a coil capable of generating electromagnetic thrust with the first magnet assembly when electrified to drive the moving member to move, and a magnetic pre-pressing assembly repulsive to the first magnet assembly; and the electromagnetic thrust keeps balance with the magnetic pre-pressure generated by the magnetic pre-pressing assembly to achieve a positioning mechanism. The connection device is used for connecting the moving member and the fixed member. Additionally, the lens drive device can achieve lens positioning, linear movement distance for lens positioning and accurate lens positioning through the combination of the magnetic pre-pressing assembly, the magnet assembly, a buffer pad and a piezoelectric material.
Description
Technical field
The utility model relates to a kind of lens driving apparatus, relates in particular to a kind of lens driving apparatus with the pre-compression functions of magnetic.
Background technology
In recent years, it is more prevalent that handheld apparatus is equipped with the trend of image extraction module, be accompanied by produce market to hand-held matching requirements performance the better and littler market demand of volume, image extraction module faces the more double requirements of high image quality and miniaturization.Raising at the capture image quality, be to improve pixel on the one hand, handheld apparatus image extraction module market trend is brought up to mega pixel, 2,000,000, three mega pixels gradually by 300,000 pixels of VGA grade, even towards more high-grade 4,000,000, five mega pixels development.Except the lifting of pixel, the sharpness of capture also is subjected to concern more, so the handheld apparatus image extraction module is also by focusing the capture function towards automatic focus function of the optics of similar camera or even optical zoom function development.
The principle of work of the automatic focus function of optics is the different far and near distances according to the capture subject matter, and the camera lens in the moderately mobile image extraction module is so that the optical imagery of capture subject matter is focused on the imageing sensor exactly, to produce distinct image.The general more common at present type of drive that moves to drive camera lens in image extraction module has step motor driving, Piezoelectric Driving and voice coil motor (Voice CoilMotor; VCM) mode such as driving.
In general, the mechanism of voice coil motor is placed in coil in the magnetic circuit that contains permanent magnet to constitute.According to Fleming's left-hand rule, when conducting electricity, coil will produce interactive propelling power with permanent magnet, to move the load bearing seat that connects permanent magnet, and then drive is fixed on the camera lens carrying slide on the load bearing seat, and flow through the size of current of coil by adjustment, reach the purpose of optical zoom, focusing.
Yet, drive camera lens at voice coil motor and do and move forward and backward and when reaching the purpose of optical zoom, focusing, the gap of the moving member of image extraction module and fixture surface of contact, the free deflection angle when regular meeting causes camera lens to move is excessive, and the reduction image quality.Therefore, when using voice coil motor to do optical zoom, focusing, need high-precision positioning function, also need on the relative beat of stationary shaft, do high-precision requirement simultaneously, to meet the needs of optical imagery with optical axis.
Mention a kind of voice coil motor 3 in the TaiWan, China patent publication No. No. 200525859 " voice coil motor ", shown in Figure 1A and Figure 1B, voice coil motor 3 comprises a slide 31, a magnetic circuit component 32, a coil 33, a plurality of guiding steel axle 341,342 and a base 35.Slide 31 is rigidly connected with magnetic circuit component 32, and coil 33 is individually fixed in base 35 with a plurality of guiding steel axles 341,342.Wherein, magnetic circuit component 32 provides a leakage field line of force 37 by gap 36 and a plurality of guiding steel axle 341,342 magnetic interlinkages, to produce magnetic precompression 381,382.These magnetic precompression 381,382 formed resultant moments, the gap that can eliminate moving part and fixture surface of contact 311,312, so that slide 31 can obtain low friction when moving forward and backward, not have free beat, high-precision motion result.
Yet, aforesaid voice coil motor 3 needs to use yoke that the leakage field line of force 37 is guided to outer rim and a plurality of guiding steel axle 341,342 magnetic interlinkages, to reach the effect of magnetic precompressed, yet, the configuration of yoke can strengthen the difficulty in the manufacturing, simultaneously, also limited the configuration of other assembly, its bottleneck has also been arranged in miniaturization.
Summary of the invention
Fundamental purpose of the present utility model is to provide a kind of lens driving apparatus with the pre-compression functions of magnetic.The utility model is according to the space constraint of configurations of lenses in the image extraction module, and the characteristic demand that moves of camera lens, adopts the repulsion that is produced between magnetic preload component and the group of magnets, to reach the function that produces the camera lens location by the mode of magnetic precompressed.Moreover, by one between between magnetic preload component and fixture the cushion pad of deformation a little so that the displacement of camera lens location can be tending towards linearization.In addition, again by the calculating that force-applied deformation produces the piezoelectric and the controller of signal between between magnetic preload component and fixture, producing in order to supplying with " the coil current suppling signal " or " coil current correction " of coil, and then reach the effect of accurate location.
In order to solve the problems of the technologies described above, according to wherein a kind of scheme of the present utility model, provide a kind of lens driving apparatus with the pre-compression functions of magnetic, it comprises: a moving member, a fixture and a coupling arrangement.This moving member has one first magnet assemblies on it.Produce the coil that can make the electromagnetic push that this moving member moves and one and the magnetic preload component that repels each other of this first magnet assemblies with this first magnet assemblies when this fixture has an energising on it, the magnetic precompression of this electromagnetic push and the generation of this magnetic preload component balances each other to reach the mechanism of location.This coupling arrangement connects this moving member and this fixture.
In order to solve the problems of the technologies described above, according to wherein a kind of scheme of the present utility model, provide a kind of lens driving apparatus with the pre-compression functions of magnetic, it comprises: a moving member, a fixture and a coupling arrangement.This moving member has a coil on it.This fixture has this coil during with energising on it and produces the magnetic preload component that first magnet assemblies that can make the electromagnetic push that this moving member moves and is repelled each other with this coil, and the magnetic precompression of this electromagnetic push and the generation of this magnetic preload component balances each other to reach the mechanism of location.This coupling arrangement connects this moving member and this fixture.
The utility model is by " magnetic preload component ", " group of magnets ", " cushion pad " the mutual combination utilization with " piezoelectric ", so that lens driving apparatus of the present utility model can produce the effect that " camera lens location ", " camera lens locate displacement can be tending towards linearization " reach " camera lens can precisely be located ".And this locating effect is realized by " the magnetic precompression that this electromagnetic push and this magnetic preload component produce balances each other ".
In order further to understand the utility model is technology, means and the effect that the predetermined purpose of realization is taked, see also following about detailed description of the present utility model and accompanying drawing, believe the purpose of this utility model, feature and characteristics, go deep into and concrete understanding when getting one thus, yet accompanying drawing only provides reference and explanation usefulness, is not to be used for the utility model is limited.
Description of drawings
Figure 1A is known voice coil motor structural representation;
Figure 1B is an A-A sectional view among Figure 1A;
Fig. 2 is the lens driving apparatus structural representation of the utility model first embodiment;
Fig. 3 is the 3-3 sectional view of the utility model Fig. 2;
Fig. 4 is the electromagnetic push-current characteristics curve map between the utility model coil electricity and first magnet assemblies;
Fig. 5 is the repulsion-range performance curve map of the utility model first magnet assemblies and magnetic preload component;
Fig. 6 is the lens driving apparatus structural representation of the utility model second embodiment;
Fig. 7 is the 7-7 sectional view of the utility model Fig. 6;
Whether Fig. 8 adds the repulsion-range performance curve map of cushion pad for the utility model;
Fig. 9 is the lens driving apparatus structural representation of the utility model the 3rd embodiment;
Figure 10 is first kind of piezoelectric signal feedback controling mode of the utility model;
Figure 11 is second kind of piezoelectric signal feedback controling mode of the utility model;
Figure 12 is the lens driving apparatus structural representation of the utility model the 4th embodiment;
Figure 13 is the lens driving apparatus structural representation of the utility model the 5th embodiment;
Figure 14 is the lens driving apparatus structural representation of the utility model the 6th embodiment; And
Figure 15 be the utility model the 7th embodiment the lens driving apparatus structural representation.
Wherein, description of reference numerals is as follows:
[known technology]
Surface of contact 311,312
Guiding steel axle 341,342
The leakage field line of force 37
Magnetic precompression 381,382
[the utility model]
Camera lens carrying slide 21
The first magnet assemblies 26a, 26b, 26c, 26d, 26e, 26f, 26g
The first hollow magnet 260
The second hollow magnet 261,261 '
Hollow magnetic conductive disk 262,262 '
The second magnet 27a, 27b
Cushion pad 28a, 28b, 28c, 28d
Piezoelectric 29a, 29b
Electromagnetic push F
Axial magnetic precompression P
Embodiment
Please refer to Fig. 2, be the lens driving apparatus structural representation of the utility model first embodiment.Lens driving apparatus 2a of the present utility model includes: camera lens carrying slide 21, a stationary shaft 22, a base 24, an air core coil 25a, one first magnet assemblies 26a and a magnetic preload component in twos.Wherein, this magnetic preload component is made up of second a magnet 27a who produces repulsion with this first magnet assemblies 26a.
As shown in Figure 2, camera lens carrying slide 21 is provided with the usefulness of a camera lens (not shown) as capture, and this first magnet assemblies 26a is fixed on this camera lens carrying slide 21.This air core coil 25a and this first magnet assemblies 26a interval one be the gap slidably, and this air core coil 25a is disposed at the periphery of this first magnet assemblies 26a.The camera lens carrying slide 21 and the first magnet assemblies 26a constitute the moving member of lens driving apparatus 2a of the present utility model through assembling.And base 24, air core coil 25a and the second magnet 27a constitute the fixture of lens driving apparatus 2a of the present utility model after assembling.Described stationary shaft 22 is fixedly set on this base 24, the guiding of moving as this moving member, wherein one or all can adopt magnetic conductive material producing side direction magnetic force of described stationary shaft 22 with the first group of magnets 26a, rocking when this side direction magnetic force helps to suppress moving member and moves.As shown in Figure 3, after this air core coil 25a conduction, promptly generate an electromagnetic field, the magnetic line of force that electromagnetic field and this first magnet assemblies 26a distribute interacts, thereby produce an electromagnetic push F, this electromagnetic push F can move axially in order to promote this moving member, and the magnetic precompression of this electromagnetic push F and the generation of this magnetic preload component balances each other to reach the mechanism of location.Yet, when electromagnetic push F disappears,, be returned to initial position to promote moving member by the repulsion (axial magnetic precompression P) that is produced between this first magnet assemblies 26a and this second magnet 27a.
Cooperate Fig. 2, please refer to Fig. 3, it is the 3-3 sectional view of the utility model Fig. 2.This first magnet assemblies 26a by one first hollow magnet 260, one second hollow magnet 261, and a hollow magnetic conductive disk 262 that is engaged between this first and second hollow magnet 260,261 formed.This first and second hollow magnet 260,261 is relatively to be incorporated into two opposition sides of this hollow magnetic conductive disk 262 with magnetic pole.Wherein, magnetic line of force Φ 1, Φ 2 that this hollow magnetic conductive disk 262 receives this first and second hollow magnet 260,261 to be distributed, and make this magnetic line of force Φ 1, Φ 2 pass through this air core coil 25a, and interact with the back electromagnetic field that produces of this air core coil 25a conduction, drive this moving member to produce an electromagnetic push.
In other words, because the first hollow magnet 260 and the second hollow magnet 261 are incorporated into hollow magnetic conductive disk 262 with identical polar magnetic, therefore the magnetic line of force Φ 1 that is distributed, Φ 2 can form the effect of repelling each other, and can not influence each other, magnetic line of force Φ 1, Φ 2 can be received concentrated by hollow magnetic conductive disk 262 simultaneously.Magnetic line of force Φ 1, Φ 2 are respectively from the N utmost point lower surface of the first hollow magnet 260 and the N utmost point upper surface of the second hollow magnet 261, guiding via hollow magnetic conductive disk 262, and turn to the slidably formed air gap in gap, magnetic line of force Φ 1, Φ 2 are by air gap and pass through air core coil 25a, get back to the S utmost point upper surface of the first hollow magnet 260 and the S utmost point lower surface of the second hollow magnet 261 more respectively, and form two closed magnetic paths.Magnetic line of force Φ 1, when Φ 2 passes through air core coil 25a, can interact with the electromagnetic field that air core coil 25a conduction back is produced, and then produce electromagnetic push.
The utility model is taken in two hollow magnet 260,261 magnetic line of force Ф 1 that disperse out, Φ 2 concentrated by hollow magnetic conductive disk 262, and with the concentrated magnetic line of force Φ 1 of take in, Φ 2 guidings and effectively pass through air core coil 25a, allow 260,261 magnetic line of force Φ 1 that disperse out of two hollow magnet, Φ 2 unlikely leakages, drive camera lens and move and obtain enough driving forces effectively.
Simultaneously, be incorporated into the design of hollow magnetic conductive disk 262 with identical polar magnetic by the first hollow magnet 260 and the second hollow magnet 261, the magnetic line of force Φ 1, the Φ 2 that allow the first hollow magnet 260 and the second hollow magnet 261 be distributed form the effect of repelling each other, and the effect of unlikely generation magnetic interlinkage causes magnetic line of force Φ 1, Φ 2 influence each other.
Moreover, the explanation of relevant magnetic precompression effect, please refer to Fig. 4 and shown in Figure 5, it is respectively electromagnetic push-current characteristics curve map between the utility model coil electricity and first magnet assemblies, and the repulsion-range performance curve map of the utility model first magnet assemblies and magnetic preload component.By among the above figure as can be known, when coil flows through electric current I 1, produce electromagnetic push Fe1, and Fe1 and magnetic precompression Fp1 realization be mutually during isoequilibrium, then moving member moves the distance of Δ x1.Moreover, when coil flows through electric current I 2, produce electromagnetic push Fe2, and Fe2 and magnetic precompression Fp2 realization be mutually during isoequilibrium, then moving member moves the distance of Δ x2.
Cooperate Fig. 2, please refer to Fig. 6 and Fig. 7, be respectively the lens driving apparatus structural representation of the utility model second embodiment and the 7-7 sectional view of the utility model Fig. 6.Assembly in the lens driving apparatus 2b of the utility model second embodiment is identical with the lens driving apparatus 2a of first embodiment, indicates with same-sign.In a second embodiment, sectional view shown in Figure 7 is identical with the principle of Fig. 3 of first embodiment.Wherein this first magnet assemblies 26b by one second hollow magnet 261 ' engage with a hollow magnetic conductive disk 262 ' institute form.Therefore, the magnetic line of force Φ 2 that this hollow magnetic conductive disk 262 ' receives this second hollow magnet 261 ' to be distributed, and make this magnetic line of force Φ 2 pass through this air core coil 25a, and with this air core coil 25a conduction after the interaction that generates an electromagnetic field, drive this moving member to produce an electromagnetic push.
In other words, second embodiment removes the first hollow magnet 260 among first embodiment, and only provides magnetic line of force Φ 2 with the second hollow magnet 261 '.Similarly, the magnetic line of force Φ 2 that hollow magnetic conductive disk 262 ' receives the second hollow magnet 261 ' to be distributed, and make magnetic line of force Φ 2 pass through air core coil 25a, and interact with the back electromagnetic field that produces of this air core coil 25a conduction, drive this moving member to produce an electromagnetic push.
Among the lens driving apparatus 2b of second embodiment of the present utility model, magnetic line of force Φ 2 is from the N utmost point upper surface of the second hollow magnet 261 ', and received concentrated by hollow magnetic conductive disk 262 ', guiding via hollow magnetic conductive disk 262 ', and turn to the slidably formed air gap in gap, magnetic line of force Φ 2 is by air gap and pass through air core coil 25a, returns the S utmost point lower surface of the second hollow magnet 261 ', and forms a closed magnetic path.When magnetic line of force Φ 2 passes through air core coil 25a, can interact with the electromagnetic field that air core coil 25a conduction back is produced, and then produce electromagnetic push.
The magnetic line of force Φ 2 that the utility model is dispersed out with the second hollow magnet 261 ' by hollow magnetic conductive disk 262 ' takes in concentrated, and with the concentrated magnetic line of force Φ of take in 2 guiding and effectively pass through air core coil 25a, the magnetic line of force Φ 2 unlikely leakages that allow the second hollow magnet 261 ' disperse are out moved and obtain enough driving force drive camera lenses effectively.
Moreover, the effect of the magnetic circuit of second embodiment and first embodiment and the principle of work of circuit and realization is identical, through relatively down, its main difference is: this magnetic preload component by second a magnet 27a and with this first magnet assemblies 26b generation repulsion between between this second magnet 27a and this fixture a little the cushion pad 28a of deformation formed.
The relevant explanation that adds cushion pad sees also shown in Figure 8ly, and it adds repulsion-range performance curve map with cushion pad for the utility model.Wherein: orlop is " desirable linear repulsion-range performance curve ", and Δ x is moving member (the first a magnet assemblies 26b) displacement; Δ d is the suffered decrement of cushion pad 28a; Δ s is the first magnet assemblies 26b and the second magnet 27a variable in distance amount.By among the figure as can be known, when no cushion pad (repulsion of the superiors-range performance curve), Δ s=Δ x; Therefore the magnetic precompression is Fm2, and big with ideal linearity output Fm0 gap, so under the situation of not using cushion pad, bigger nonlinear characteristic is arranged.Yet, when cushion pad (repulsion in middle layer-range performance curve), Δ s=Δ x-Δ d; Therefore the magnetic precompression is Fm1, and dwindles with ideal linearity output Fm0 gap, so having under the situation of using cushion pad, makes the utility model that preferable linear characteristic be arranged.In other words, the utility model is by the use of the cushion pad 28a of deformation a little between between the second magnet 27a and fixture, so that the displacement of camera lens location can be tending towards linearization.
Cooperate Fig. 2, please refer to Fig. 9, be the lens driving apparatus structural representation of the utility model the 3rd embodiment.Assembly in the lens driving apparatus 2c of the utility model the 3rd embodiment is identical with the lens driving apparatus 2a of first embodiment, indicates with same-sign.The effect of the magnetic circuit of the 3rd embodiment and first embodiment and the principle of work of circuit and realization is identical, through relatively, its main difference is: this magnetic preload component by one with the second magnet 27a and of this first magnet assemblies 26c generation repulsion force-applied deformation and the piezoelectric 29a that produces signal is formed between between this second magnet 27a and this fixture.
The piezoelectric signal feedback controling mode of relevant piezoelectric please refer to Figure 10 and shown in Figure 11, and it is respectively first kind of piezoelectric signal feedback controling mode of the utility model and second kind of piezoelectric signal feedback controling mode of the utility model.As shown in Figure 10, the piezoelectric signal of this piezoelectric 29a and a displacement of targets amount command signal relatively after, calculate via a controller C again and produce a coil current suppling signal in order to the air core coil 25a that supplies with this lens driving apparatus 2c, to reach accurate location.As shown in Figure 11, the piezoelectric signal of this piezoelectric 29a and a displacement of targets amount command signal relatively after, calculate via a controller C again and produce a coil current correction of supplying with the air core coil 25a of this lens driving apparatus 2c, to reach accurate location.In other words, the utility model is by the calculating that force-applied deformation produces the piezoelectric 29a and the controller C of signal between between the second magnet 27a and fixture, producing in order to supplying with air core coil 25a " coil current suppling signal " or " coil current correction ", and then reach the effect of accurate location.
Cooperate Fig. 2, please refer to Figure 12, be the lens driving apparatus structural representation of the utility model the 4th embodiment.Assembly in the lens driving apparatus 2d of the utility model the 4th embodiment is identical with the lens driving apparatus 2a of first embodiment, indicates with same-sign.The effect of the magnetic circuit of the 4th embodiment and first embodiment and the principle of work of circuit and realization is identical, through relatively, its main difference is: this magnetic preload component by one with this first magnet assemblies 26d produce repulsion the second magnet 27a, reach two force-applied deformation and the cushion pad 28b that produces the piezoelectric 29a of signal and deformation is a little formed between between this second magnet 27a and this fixture respectively.That is the 4th embodiment has because of the effect in conjunction with second and third embodiment produced.
Cooperate Fig. 2, please refer to shown in Figure 13ly, it is the lens driving apparatus structural representation of the utility model the 5th embodiment.Assembly in the lens driving apparatus 2e of the utility model the 5th embodiment is identical with the lens driving apparatus 2a of first embodiment, indicates with same-sign.The effect of the magnetic circuit of the 5th embodiment and first embodiment and worker's principle of work of circuit and realization is identical, through comparing, its main difference is: this air core coil 25b is disposed at the inner ring of this first magnet assemblies 26e, and this air core coil 25b is arranged on the moving member, and the first magnet assemblies 26e is arranged on the fixture.Moreover the magnetic preload component is made up of a plurality of second magnet 27b with this air core coil 25b generation repulsion.
Cooperate Fig. 6, please refer to shown in Figure 14ly, it is the lens driving apparatus structural representation of the utility model the 6th embodiment.Assembly in the lens driving apparatus 2f of the utility model the 6th embodiment is identical with the lens driving apparatus 2b of second embodiment, indicates with same-sign.The effect of the magnetic circuit of the 6th embodiment and second embodiment and the principle of work of circuit and realization is identical, after relatively, its main difference is: this air core coil 25b is disposed at the inner ring of this first magnet assemblies 26f, and this air core coil 25b is arranged on the moving member, and the first magnet assemblies 26f is arranged on the fixture.Moreover, the second magnet 27b and that the magnetic preload component produces repulsion by a plurality of and this air core coil 25b between between this second magnet 27b and this fixture a little the cushion pad 28c of deformation formed.
Cooperate Fig. 9, please refer to shown in Figure 15ly, it is the lens driving apparatus structural representation of the utility model the 7th embodiment.Assembly in the lens driving apparatus 2g of the utility model the 7th embodiment is identical with the lens driving apparatus 2c of the 3rd embodiment, indicates with same-sign.The effect of the magnetic circuit of the 7th embodiment and the 3rd embodiment and the principle of work of circuit and realization is identical, through comparing, its main difference is: this air core coil 25b is disposed at the inner ring of this first magnet assemblies 26g, and this air core coil 25b is arranged on the moving member, and the first magnet assemblies 26g is arranged on the fixture.Moreover, the second magnet 27b and that the magnetic preload component produces repulsion by a plurality of and this air core coil 25b force-applied deformation and the piezoelectric 29b that produces signal is formed between between this second magnet 27b and this fixture.
In sum, the utility model is according to the space constraint of configurations of lenses in the image extraction module, and the characteristic demand that moves of camera lens, adopts the repulsion that is produced between magnetic preload component and the group of magnets, to reach the function that produces the camera lens location by the mode of magnetic precompressed.Moreover, by one between between magnetic preload component and fixture the cushion pad of deformation a little so that the displacement of camera lens location can be tending towards linearization.In addition, again by the calculating that force-applied deformation produces the piezoelectric and the controller of signal between between magnetic preload component and fixture, producing in order to supplying with " the coil current suppling signal " or " coil current correction " of coil, and then reach the effect of accurate location.
In other words, the utility model is by " magnetic preload component ", " group of magnets ", " cushion pad " the mutual combination utilization with " piezoelectric ", so that lens driving apparatus of the present utility model can produce the effect that " camera lens location ", " camera lens locate displacement can be tending towards linearization " reach " camera lens can precisely be located ".And the mechanism that this locating effect is realized by " the magnetic precompression that this electromagnetic push and this magnetic preload component produce balances each other ".
Above-described only is preferable possible embodiments of the present utility model; described embodiment is not in order to limit scope of patent protection of the present utility model; therefore the equivalent structure done of every utilization instructions of the present utility model and accompanying drawing content changes, and in like manner all should be included in the protection domain of the present utility model.
Claims (24)
1, a kind of lens driving apparatus with the pre-compression functions of magnetic is characterized in that, comprising:
One moving member has one first magnet assemblies on it;
One fixture, have when energising and this first magnet assemblies on it and produce the coil that can make the electromagnetic push that this moving member moves and one and the magnetic preload component that repels each other of this first magnet assemblies, the magnetic precompression of this electromagnetic push and the generation of this magnetic preload component balances each other to reach the mechanism of location; And
One coupling arrangement, it connects this moving member and this fixture.
2, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 1, it is characterized in that: this coupling arrangement is at least one stationary shaft that is fixedly set on this base, the guiding of moving as this moving member, and wherein one or all adopt magnetic conductive material of this stationary shaft.
3, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 1 is characterized in that: this coupling arrangement is at least one slipping plane that is fixedly set on this base with the guiding of moving as this moving member.
4, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 1 is characterized in that: this coil is an air core coil, and itself and this first magnet assemblies is a gap slidably at interval, and this air core coil is disposed at the periphery of this first magnet assemblies.
5, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 4, it is characterized in that: this first magnet assemblies is a hollow group of magnets, this hollow group of magnets engages institute by a hollow magnet to be formed with a hollow magnetic conductive disk, and described hollow magnetic conductive disk, described hollow magnet and described air core coil match and drive this moving member.
6, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 1, it is characterized in that: this first magnet assemblies is a hollow group of magnets, its by one first hollow magnet, one second hollow magnet, and a hollow magnetic conductive disk that is engaged between this first and second hollow magnet formed, and this first and second hollow magnet is relatively to be incorporated into two opposition sides of this hollow magnetic conductive disk with magnetic pole.
7, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 1 is characterized in that: this magnetic preload component is made up of one or more second magnet with this first magnet assemblies generation repulsion.
8, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 1 is characterized in that: second magnet and one that this magnetic preload component produces repulsion by one or more and this first magnet assemblies between between this second magnet and this fixture a little the cushion pad of deformation formed.
9, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 1 is characterized in that: second magnet and one that this magnetic preload component produces repulsion by one or more and this first magnet assemblies force-applied deformation and the piezoelectric that produces signal is formed between between this second magnet and this fixture.
10, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 9 is characterized in that: this magnetic preload component is produced second magnet, and two force-applied deformation and the cushion pad that produces the piezoelectric of signal and deformation is a little formed between between this second magnet and this fixture respectively of repulsion by one or more and this first magnet assemblies.
11, as claimed in claim 9 have a pre-compression functions lens driving apparatus of magnetic, it is characterized in that: described lens driving apparatus also comprises a controller that produces a coil current suppling signal by calculating according to the piezoelectric signal and a displacement of targets amount command signal comparison gained result of this piezoelectric.
12, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 9 is characterized in that: described lens driving apparatus also comprises a controller that produces a coil current correction by calculating according to the piezoelectric signal and a displacement of targets amount command signal comparison gained result of this piezoelectric.
13, a kind of lens driving apparatus with the pre-compression functions of magnetic is characterized in that, comprising:
One moving member has a coil on it;
One fixture, have one on it and produce the magnetic preload component that first magnet assemblies that can make the electromagnetic push that this moving member moves and is repelled each other with this coil with this coil in when energising, the magnetic precompression of this electromagnetic push and the generation of this magnetic preload component balances each other to reach the mechanism of location; And
One coupling arrangement, it connects this moving member and this fixture.
14, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 13 is characterized in that: this coupling arrangement is at least one stationary shaft that is fixedly set on this base, the guiding of moving as this moving member.
15, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 13 is characterized in that: this coupling arrangement is at least one slipping plane that is fixedly set on this base with the guiding of moving as this moving member.
16, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 13 is characterized in that: this coil is an air core coil, and itself and this first magnet assemblies is a gap slidably at interval, and this air core coil is disposed at the inner ring of this first magnet assemblies.
17, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 16, it is characterized in that: this first magnet assemblies is a hollow group of magnets, this hollow group of magnets engages institute by a hollow magnet to be formed with a hollow magnetic conductive disk, and described hollow magnetic conductive disk, described hollow magnet and described air core coil match and drive this moving member.
18, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 13, it is characterized in that: this first magnet assemblies is a hollow group of magnets, its by one first hollow magnet, one second hollow magnet, and a hollow magnetic conductive disk that is engaged between this first and second hollow magnet formed, and this first and second hollow magnet is relatively to be incorporated into two opposition sides of this hollow magnetic conductive disk with magnetic pole.
19, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 13 is characterized in that: this magnetic preload component is made up of one or more second magnet with this coil generation repulsion.
20, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 13 is characterized in that: second magnet and one that this magnetic preload component produces repulsion by one or more and this coil between between this second magnet and this fixture a little the cushion pad of deformation formed.
21, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 13 is characterized in that: second magnet and one that this magnetic preload component produces repulsion by one or more and this coil force-applied deformation and the piezoelectric that produces signal is formed between between this second magnet and this fixture.
22, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 21 is characterized in that: this magnetic preload component is produced second magnet, and two force-applied deformation and the cushion pad that produces the piezoelectric of signal and deformation is a little formed between between this second magnet and this fixture respectively of repulsion by one or more and this coil.
23, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 21 is characterized in that: described lens driving apparatus also comprises a controller that produces a coil current suppling signal by calculating according to the piezoelectric signal and a displacement of targets amount command signal comparison gained result of this piezoelectric.
24, the lens driving apparatus with the pre-compression functions of magnetic as claimed in claim 21 is characterized in that: described lens driving apparatus also comprises a controller that will produce a coil current correction by calculating according to the piezoelectric signal and a displacement of targets amount command signal comparison gained result of this piezoelectric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201525229U CN201177681Y (en) | 2007-06-13 | 2007-06-13 | Camera driving apparatus having magnetic pre-pressing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201525229U CN201177681Y (en) | 2007-06-13 | 2007-06-13 | Camera driving apparatus having magnetic pre-pressing function |
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| Publication Number | Publication Date |
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| CN201177681Y true CN201177681Y (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201525229U Expired - Lifetime CN201177681Y (en) | 2007-06-13 | 2007-06-13 | Camera driving apparatus having magnetic pre-pressing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201177681Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313964A (en) * | 2010-07-02 | 2012-01-11 | 思考电机（上海）有限公司 | Lens driving device, automatic focusing camera and mobile terminal device |
| CN104410332A (en) * | 2014-12-05 | 2015-03-11 | 深圳市世尊科技有限公司 | Magnetic suspension motor |
| CN106301065A (en) * | 2016-07-28 | 2017-01-04 | 中国计量科学研究院 | There is the single shaft nanometer displacement executor of millimeter stroke |
| CN110022084A (en) * | 2019-05-09 | 2019-07-16 | 山东理工大学 | A kind of rod-type magnetic repulsion driving method based on piezoelectric ceramics |
-
2007
- 2007-06-13 CN CNU2007201525229U patent/CN201177681Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313964A (en) * | 2010-07-02 | 2012-01-11 | 思考电机（上海）有限公司 | Lens driving device, automatic focusing camera and mobile terminal device |
| CN102313964B (en) * | 2010-07-02 | 2013-06-19 | 思考电机（上海）有限公司 | Lens driving device, automatic focusing camera and mobile terminal device |
| CN104410332A (en) * | 2014-12-05 | 2015-03-11 | 深圳市世尊科技有限公司 | Magnetic suspension motor |
| CN106301065A (en) * | 2016-07-28 | 2017-01-04 | 中国计量科学研究院 | There is the single shaft nanometer displacement executor of millimeter stroke |
| CN110022084A (en) * | 2019-05-09 | 2019-07-16 | 山东理工大学 | A kind of rod-type magnetic repulsion driving method based on piezoelectric ceramics |
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