CN105099119B - It is a kind of to change the optical anti-vibration voice coil motor and its assembly method for moving axis center - Google Patents
It is a kind of to change the optical anti-vibration voice coil motor and its assembly method for moving axis center Download PDFInfo
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- CN105099119B CN105099119B CN201510622131.8A CN201510622131A CN105099119B CN 105099119 B CN105099119 B CN 105099119B CN 201510622131 A CN201510622131 A CN 201510622131A CN 105099119 B CN105099119 B CN 105099119B
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- shrapnel
- camera lens
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- lens carrier
- pedestal
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Abstract
The present invention provides a kind of optical anti-vibration voice coil motor that can change shifting axis center, including pedestal, at least one shrapnel, camera lens carrier, at least three magnet groups and shell；The pedestal, the shell and the magnet group, which link together, forms motionless structure, the magnet group is arranged in the shell, the camera lens carrier includes ontology and the coil being arranged on the ontology, the number of the coil is identical with the number of the magnet group, the coil is oppositely arranged one by one with the magnet group, which connects the camera lens carrier and the magnet group and form a multivariant mass-spring system with spring center；The shrapnel is electrically connected with the coil；The electromagnetism resultant direction of each coil is and not parallel with optical axis neither towards nor backwards to the spring center；By adjusting the size of each resultant force, camera lens can be controlled to move axis and tilt and moved along optical axis, reach optical anti-vibration and automatic focusing function；Above structure, not only with it is simple in structure, reliability is high, reduces the performance of production cost, but also good image resolution and diamagnetic interference can be maintained.
Description
Technical field
The invention belongs to optical anti-vibration engineering device technique field more particularly to a kind of optical anti-vibration sounds that can change shifting axis center
Coil motor and its assembly method.
Background technology
The skill of micro-optical stabilization voice coil motor, which is stated, now has been widely used in high-end mobile phone, can be effectively reduced
The probability of fuzzy photo is taken under low luminous environment and reduces the shake for making us puzzlement in film.But relative to general automatic
Focusing motor, the design comparison of stabilization voice coil motor is complicated, production yield and less efficient, and cost is higher.Therefore, it is described
Technology does not spread to middle-end and low-end mobile phone also, and most mobile phone is still failed to enjoy benefit caused by the technology with family.
Micro-optical stabilization voice coil motor can be divided into three classes:Camera model shift shaft type voice coil motor, camera lens parallel-moving type voice coil
Motor and camera lens shift shaft type voice coil motor.Wherein, in camera model shift shaft type voice coil motor, voice coil motor control camera lens and shadow
As sensor rotates together；In camera lens parallel-moving type voice coil motor, voice coil motor control camera lens translation, and image sensor is not
It is dynamic；In camera lens shift shaft type voice coil motor, voice coil motor control camera lens rotation, and image sensor is motionless.
Above-mentioned three kinds of voice coil motors have their own advantages and shortcoming.For example, the advantages of camera model shift shaft type voice coil motor is light
It learns stabilization effect and image quality is best, shortcoming is moving parts weight highest, power consumption therefore maximum.Camera lens shift shaft type voice coil horse
Up to the advantages of be that structure is relatively easy, be conducive to produce, shortcoming be the resolution of the image edge in optical anti-vibration it is possible that under
Drop.The structural complexity and image edge resolution of camera lens parallel-moving type voice coil motor be situated between camera model shift shaft type voice coil motor and
Between camera lens shift shaft type voice coil motor, it can be received by production dealer and user, power consumption can also reach tolerance interval.Therefore,
Camera lens parallel-moving type voice coil motor becomes the mainstream component in mobile terminal such as mobile phone stabilization scheme.
Camera lens shift shaft type optical anti-vibration voice coil motor structure now includes a shell, a pedestal, at least one set of bullet
Property material, at least three groups of magnetites, at least three absolute coils and a camera lens carrier.Shell and pedestal form motionless structure；Bullet
Property material connection comprising camera lens carrier bascule and motionless structure, form a multivariant spring vibration subsystem
System allows camera lens that can be used as the deflection (for optical anti-vibration) of both direction and a displacement along optical axis direction (supplies auto-focusing
With).According to the position of coil and magnetite, camera lens shift shaft type optical anti-vibration voice coil motor can be divided into two classes.First kind camera lens
Coil and magnetite in shift shaft type optical anti-vibration voice coil motor respectively positioned at motionless and bascule, and do not wrap in such motor
Elastic material containing energization only includes one to two group elastic material, and connects the bascule comprising camera lens carrier and magnetite.Due to
Bascule in such motor does not need to be electrically connected, therefore is more advantageous to producing.But due to the magnetite position of first kind motor
In bascule, when having other external strong magnetic fields close to them, performance may be interfered.
Coil and magnetite in second class motor are located at activity and motionless structure respectively.Due to the magnetite of the second class motor
Positioned at motionless structure, the ability of their anti-extraneous magnetic field interference is higher.Therefore, the second class motor becomes the shift shaft type light of mainstream
Learn anti-vibration motor.In such motor, the electromagnetism force direction of each coil or every group of magnetite is acted on, it is substantially parallel with optical axis.Cause
This, their shifting axis center (being rotation center of the camera lens optical axis in optical anti-vibration) and spring center (is using torque
In the moving structure comprising camera lens, the rotation center of moving structure) substantially in same position.In order to reach good stabilization effect
Fruit, moving axis center needs the optical centre as possible far from camera lens and close image sensor.Therefore, the spring constant of lower shrapnel
(Spring Constant) is adjusted to more than upper shrapnel height, to make the spring center and the shifting axis center as far as possible
Ground is close to the center of the lower shrapnel.But this can lead to two problems occur：First, the shifting axis center can still connect very much
The nearly optical centre, still needs to improve so as to cause optical anti-vibration effect；Second, the center of gravity of the spring center and moving structure
Between there are certain distance, when camera lens is towards horizontal direction, act on the gravity of moving structure (comprising camera lens) can make it is described
Spring center occurs to move axis inclination, leads to the resolution of image edge to reduce.Therefore, such voice coil motor needs to use additionally
Control mode goes to move axis inclination caused by compensation gravity, so as to increase the complexity of control system and cost.
Therefore, design the optical anti-vibration voice coil motor that a kind of new change moves axis center just seems outstanding to solve the above problems
For necessity.
Invention content
The technical problems to be solved by the invention are to provide a kind of optical anti-vibration voice coil motor that can change shifting axis center
And its assembly method, it is intended to which it not only has, and simple in structure, reliability is high, reduces the performance of production cost, but also can support light
Inclined light shaft when learning stabilization, auto-focusing and compensation auto-focusing is to promote image resolution and diamagnetic interference.
The invention is realized in this way a kind of can change the optical anti-vibration voice coil motor for moving axis center, including pedestal, extremely
A few shrapnel, camera lens carrier, at least three magnet groups and shell；Wherein, the pedestal, the shell and the magnet group connect
Be connected together the motionless structure of composition；At least three magnets group is arranged on the inner wall of the shell；The camera lens carrier packet
Include the coil of ontology and setting on the body；The coil and the ontology link together, and form bascule；It is described
The number of coil is identical with the number of the magnet group；The coil is oppositely arranged one by one with the magnet group, and the coil is set
It is equipped with the first line end and the second line end；At least one shrapnel connects the camera lens carrier and the magnet group and forms one
Multivariant mass-spring system, the multivariant mass-spring system include a spring center；On the shrapnel
At least three conductive paths are provided with, the both ends of first line end and second line end respectively with the conductive path are electrically connected
It connects；At least one shrapnel coil described in direct or indirect connection and conductive material in the pedestal on circuit；Each
The direction of the electromagnetism resultant force of coil is neither towards nor backwards to the spring center.
Further, aforementioned each magnet group includes the first magnet and the second magnet；First magnet is arranged on institute
It states on pedestal；Second magnet, which is folded, to be located on first magnet, the size of first magnet and second magnet or
Shape is different, and the magnetic direction of first magnet and second magnet is opposite.
Further, it is formed with positioning region on aforementioned pedestal；The camera lens carrier further includes to be formed on the body
Locating slot；The positioning region coordinates with the locating slot.
Further, aforementioned at least one shrapnel includes the first shrapnel, a part and the bottom of first shrapnel
Seat is connected with the bottom of the ontology；Another part of first shrapnel is connect with the bottom of first magnet.
Further, aforementioned at least one shrapnel include the first shrapnel and the second shrapnel, one of first shrapnel
Divide and connect with the top of the pedestal, another part of first shrapnel is connect with the bottom of first magnet；Described
Two shrapnels are connected to the top of the camera lens carrier, and second shrapnel connects with the top of second magnet and the shell
It connects.
Further, the aforementioned optical anti-vibration voice coil motor that can change shifting axis center further includes pressure ring；The pressure ring is set
It puts between the pedestal and first shrapnel；First shrapnel is pressed in the lower section of the camera lens carrier by the pressure ring,
And it is connect with first shrapnel.
Further, aforementioned pressure ring includes the multiple extensions of cricoid matrix and formation on the matrix；It is described
The shrapnel is pressed in the lower section of the camera lens carrier by matrix, and is connect with the shrapnel；The camera lens carrier further includes to be formed
Multiple notches on the body；Through-hole is formed on the substrate；The pedestal further includes the inner surface from the substrate
The stage portion to extend internally；The multiple extension along described matrix the arranged circumferentially spaced inner surface in described matrix
On；Each extension includes the first extension and the second extension；First extension is from described matrix towards the camera lens
Carrier extends and extends on the camera lens carrier in corresponding notch；Second extension is from described matrix towards the bottom
Seat extends and extends to be contacted with the stage portion on the pedestal.
Further, aforementioned camera lens carrier further includes the multiple third extensions to be formed on the body；It is described to lack
Mouth and the third extension are arranged alternately along the circumferential direction of the ontology；The third extension is from the ontology described in
Stage portion extends and is contacted with the stage portion.
Further, the second aforementioned extension and the third extension are arranged alternately simultaneously along the circumferential direction of the ontology
It is continuously contacted with along the circumferential direction and the stage portion of the ontology.
The present invention also provides it is a kind of it is above-mentioned it is diamagnetic interference parallel-moving type optical anti-vibration voice coil motor assembly method, including：
The coil is formed on the wrapping post and boss that live wire is wound on the camera lens carrier；
First shrapnel is placed below the camera lens carrier, and the wrapping post below the camera lens carrier is enabled to pass through institute
State the hole on the first shrapnel；
First shrapnel and the camera lens carrier are mechanically connected；
First shrapnel is carried out circuit with the live wire to connect；
The pressure ring is placed below first shrapnel, and is mechanically connected；
First shrapnel is placed on above the pedestal, first shrapnel is mechanically connected with the pedestal,
First shrapnel is electrically connected with the conductive part on the pedestal again；
The magnet group is fixed on the inner wall of the shell, the camera lens carrier is placed in the enclosure, and
Ensure that each coil is opposite with a magnet group；
The bottom of first shrapnel and first magnet is mechanically connected；
Second shrapnel is placed on to the top of the camera lens carrier, and the wrapping post above the camera lens carrier is enabled to pass through
Hole on second shrapnel, while second shrapnel and the camera lens carrier are mechanically connected will first shrapnel with
The live wire carries out circuit connection.
Compared with prior art, the present invention advantageous effect is：What embodiment of the present invention provided can change shifting axis center
Optical anti-vibration voice coil motor and its assembly method, by the way that magnet is mounted in motionless structure, can change move axis center light
The performance for learning stabilization voice coil motor is not susceptible to extraneous magnetic field influence, thus with certain diamagnetic jamming performance；Meanwhile pass through
The first opposite magnet of magnetic direction and the second magnet are folded and be located on pedestal so that the direction of the electromagnetism resultant force of each coil was both
Not towards not backwards to the spring center, and not parallel with optical axis yet；It to be applied when there are one torques in the mass-spring system
When, the mass-spring system can surround the spring center and rotate；By adjusting the size of each resultant force, camera lens can be controlled
It moves axis to tilt and move along optical axis, reaches optical anti-vibration and automatic focusing function；Therefore, it is opened or automatic right in optical anti-vibration
Jiao Shi, the optical anti-vibration voice coil motor that can change shifting axis center not only support that optical anti-vibration, auto-focusing and compensation are automatic right
Inclined light shaft when burnt is simple in structure to maintain good image edge resolution, it is easy to produce and be conducive to improve reliability
And reduce cost.
Description of the drawings
Fig. 1 is the structural representation that can change the optical anti-vibration voice coil motor for moving axis center that first embodiment of the invention provides
Figure.
Fig. 2 is the decomposition diagram that can change the optical anti-vibration voice coil motor for moving axis center in Fig. 1.
Fig. 3 is the camera lens carrier that can change the optical anti-vibration voice coil motor for moving axis center in Fig. 2, the first shrapnel and pressure ring
The enlarged diagram of another angle.
Fig. 4 is the connection of the camera lens carrier that can change the optical anti-vibration voice coil motor for moving axis center in Fig. 2, pressure ring and pedestal
Relation schematic diagram.
Fig. 5 a are that can change in Fig. 1 moves shifting axis center of the optical anti-vibration voice coil motor before axis is moved of axis center, spring
Center and the structure diagram of optical axis.
Fig. 5 b are that can change in Fig. 1 moves shifting axis center of the optical anti-vibration voice coil motor after axis is moved of axis center, spring
Center and the structure diagram of optical axis.
Fig. 5 c are can change in shifting axis of the optical anti-vibration voice coil motor for moving axis center before axis is moved and after shifting axis in Fig. 1
The relation schematic diagram of the heart and spring center.
Fig. 6 a are the shifting axis centers of the optical anti-vibration voice coil motor that can change shifting axis center in Fig. 1 in optical centre
Stabilization effect diagram.
Fig. 6 b be in Fig. 1 can change move axis center optical anti-vibration voice coil motor shifting axis center in image sensors
Stabilization effect diagram during the heart.
Fig. 7 is to change vertical view of the optical anti-vibration voice coil motor for moving axis center before axis is moved in Fig. 1.
Fig. 8 is to change sectional view of the optical anti-vibration voice coil motor for moving axis center before axis is moved in Fig. 7.
Fig. 9 is to change vertical view of the optical anti-vibration voice coil motor for moving axis center after axis is moved in Fig. 1.
Figure 10 is to change sectional view of the optical anti-vibration voice coil motor for moving axis center after axis is moved in Fig. 9.
Figure 11 is the knot that the moving structure that can change the optical anti-vibration voice coil motor for moving axis center in Fig. 1 is affected by gravity
Structure schematic diagram.
Figure 12 is that the structure that can change the optical anti-vibration voice coil motor for moving axis center that second embodiment of the invention provides is shown
It is intended to.
Figure 13 is the assembly method provided in an embodiment of the present invention that can change the optical anti-vibration voice coil motor for moving axis center
Flow diagram.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It please refers to Fig.1 shown in Fig. 4, what first embodiment of the invention provided can change the optical anti-vibration voice coil for moving axis center
Motor 100 includes pedestal 110, pressure ring 120, the first shrapnel 130, camera lens carrier 140, magnet group 150, the second shrapnel 131 and outer
Shell 160.Wherein, the pressure ring 120, first shrapnel 130, the camera lens carrier 140, second shrapnel 131 and described
Magnet group 150 is respectively positioned in the box body formed by the pedestal 110 and the shell 160.
Specifically, the pedestal 110 includes substrate 112, the positioning region 114 that is formed on the substrate 112 and from institute
State the stage portion 118 that the inner surface of substrate 112 extends internally.In the embodiment shown in Figure 2, the positioning region 114 includes more
A bulge-structure (non-label) protruded from the substrate 112 towards the camera lens carrier 140, for the camera lens carrier
Positioning and/or position-limiting action (will hereinafter be described further) are played in the cooperation (as shown in Figure 4) of locating slot 147 on 140.Institute
The middle part for stating substrate 112 is formed with through-hole 116, and the stage portion 118 is the circular step structure in the through-hole 116,
Available for playing the effects that dust-proof and (will hereinafter be described further) with the pressure ring 120 and the camera lens carrier 140 cooperation.
In addition, the pedestal 110 also has the conductive part with the electric connections such as external module such as printed circuit board.
The pressure ring 120 is arranged between the pedestal 110 and first shrapnel 130.The pressure ring 120 includes ring-type
Matrix 122 and the extension 124 that is formed in described matrix 122.First shrapnel 130 is pressed in institute by described matrix 122
The lower section of camera lens carrier 140 is stated, and can such as be connect by mechanical connection manner using glue with shrapnel 130.Relative to relatively thin
First shrapnel 130 for, the thickness of described matrix 122 is thicker, can effectively protect relatively thin first shrapnel 130
To enhance the anti-dropping power of first shrapnel 130.Moreover, described matrix 122 can guarantee that first shrapnel 130 is driven plain in institute
140 lower section of camera lens carrier is stated, movable inclined and initial current of focusing caused by 130 injustice of the first shrapnel can be reduced and missed
The problems such as poor, increases the consistency and production yield of the voice coil motor 100.
The multiple extension 124 along described matrix 122 the arranged circumferentially spaced inner surface in described matrix 122
On.Each extension 124 includes the first extension 1241 and the second extension 1243.First extension 1241 is from the base
Body 122 extends upwardly to the top of described matrix 122, i.e., extends towards the camera lens carrier 140 and extend to the camera lens load
On body 140 in corresponding notch 148 (as shown in Figure 4)；Second extension 1243 extends downward into institute from described matrix 122
The lower section of matrix 122 is stated, i.e., extends and extends to towards the pedestal 110 and contacted with the stage portion 118 on the pedestal 110.
In this way, first extension 1241 and second extension 1243 are matched respectively with the notch 148 and the stage portion 118
It closes, so as to significantly reduce the gap between the camera lens carrier 140 and the pedestal 110, external dust can be prevented from institute
The gap between camera lens carrier 140 and the pedestal 110 is stated to enter 140 lower section of camera lens carrier and pollute the camera lens carrier
The optical filter or image sensor of 140 lower sections, and then enhance the reliability of the camera model.
The camera lens carrier 140 includes ontology 141, boss 143, upper wrapping post and lower wrapping post (non-label), coil
145th, third extension 149 and above-mentioned locating slot 147 and notch 148.Wherein, the ontology 141 is hollow annular structure,
Its inner wall can closely be connected with camera lens, allow camera lens that can make multivariant activity, and auto-focusing and optical anti-vibration work(are caused to reach
Energy.The boss 143 is formed in the outer surface of the ontology 141.Upper wrapping post and lower wrapping post are formed in the ontology 141
Upper/lower terminal.The multiple absolute coil 145 can be 3,4 or more.In the present embodiment, the coil 145 is
Three, three coils 145 are separately positioned on the outer wall of the ontology 141 and correspond to a magnet group 150 respectively, and with
The ontology 141 links together and forms bascule.The coil 145 is coiled by live wire, and each coil 145 has the
One line end and the second line end.
The locating slot 147 is formed in the outer surface of the ontology 141, and is arranged in a one-to-one correspondence with the positioning region 114.
The positioning region 114 coordinates with the corresponding locating slot 147, plays positioning and/or position-limiting action, ease of assembly and positioning.
The notch 148 and the third extension 149 are formed in the inner surface of the ontology 141, and the notch 148 and described
Three extensions 149 are arranged alternately along the circumferential direction of the ontology 141.The third extension 149 is from the ontology 141 towards institute
Stage portion 118 is stated to extend and contact with the stage portion 118.In this way, first extension 1241 is matched with the notch 148
It closes, meanwhile, second extension 1243 and the third extension 149 are arranged alternately simultaneously along the circumferential direction of the ontology 141
It is continuously contacted with along the circumferential direction and the stage portion 118 of the ontology 141, so as to significantly reduce the camera lens carrier 140
With the gap between the pedestal 110, external dust can be prevented between the camera lens carrier 140 and the pedestal 110
Gap enters the lower section of the camera lens carrier 140 and pollutes the optical filter or image sensor below the camera lens carrier 140, and then
Enhance the reliability of the camera model.
First shrapnel 130 is set to the lower section of the camera lens carrier 140 (as shown in Fig. 2 and Fig. 5-9).Described first
A part for shrapnel 130 and the top surface of the pedestal 110 are mechanically connected, and be electrically connected with the conductive part of the pedestal 110；It is described
Another part of first shrapnel 130 is connect with the bottom mechanical of the magnet group 150.Be provided on first shrapnel 130 to
Few three conductive paths, first line end, second line end on the coil 145 respectively with the conductive path two
End electrical connection.In this way, first shrapnel 130 directly or indirectly will be in the coil 145 and the pedestal 110 on circuit
Conductive part connection.
Second shrapnel 131 is set to the top of the camera lens carrier 140 (as shown in Fig. 2 and Fig. 7-8).Described second
Shrapnel 131 is connect with the top mechanism of the magnet group 150.Conductive path, the coil are provided on second shrapnel 131
The both ends of first line end, second line end respectively with the conductive path on 145 are electrically connected.
The magnet group 150 is fixed on the inner wall of the shell 160, and the magnet group 150, the shell 160 and
The pedestal 110, which links together, forms motionless structure.The number of the magnet group 150 is identical with the number of the coil 145,
And each magnet group 150 is oppositely arranged with a coil 145.The number of the magnet group 150 can be 3,4 or more
It is a.In the present embodiment, the number of the magnet group 150 is 3.Each magnet group 150 includes the first magnet 152 and the second magnetic
Body 154.First magnet 152 and second magnet 154 are folded on the direction of the pedestal 110 is approximately perpendicular to be set.
In the present embodiment, first magnet 152 is arranged on the pedestal 110, and second magnet 154 is arranged on first magnetic
It is contacted on body 152 and with the shell 160.The magnetic direction of first magnet 152 and second magnet 154 is on the contrary, i.e.
In first magnet 152 and second magnet 154 magnetic direction of one be towards the camera lens carrier 140, another
Backwards to the camera lens carrier 140.Shape, the size of first magnet 152 and second magnet 154 can be according to actual needs
It is adjusted, can be the same or different meet the needs of different.First magnet 152 and second magnet 154
It can be magnetite.First shrapnel 130 is connect with the bottom surface of first magnet 152, second shrapnel 131 and described the
The top surface connection of two magnets 154.
It please join shown in Fig. 5 a to Fig. 6 b, the operation principle of brief description voice coil motor 100.
As described above, the ontology 141 of the coil 145 and the camera lens carrier 140 links together, composition activity knot
Structure；The magnet group 150, the shell 160 and the pedestal 110, which link together, forms motionless structure；First shrapnel
130th, second shrapnel 131 connects the camera lens carrier 140 and motionless structure, can form a multivariant spring oscillator
System.The inner wall of the camera lens carrier 140 in the bascule can closely be connected with camera lens, and camera lens can be made mostly freely
The activity of degree, to reach auto-focusing and optical anti-vibration function；The camera lens includes at least a piece of lens.As shown in Fig. 5 a-6b,
Multivariant mass-spring system includes a spring rotation center 170 (claiming spring center afterwards), when there are one torque applications
In the system, the system can be rotated around spring center 170；By adjusting the first shrapnel described in mass-spring system
130 and the spring constant of second shrapnel 131, the position of the spring center 170 can be adjusted.By adjusting the coil
The position and size shape of 145 position and size shape and first magnet 152 and second magnet 154, can be with
Adjust the position and direction of the electromagnetism resultant force of each coil 145 after powered up.
The voice coil motor 100 is in impulse stroke on (focus target is infinitely as far as microspur) and the optical axis direction of motor
When, the electromagnetism resultant direction of each coil 145 after powered up is adjusted to tilt upward (an example in such as attached drawing 5a and 5b
Son) or it is not parallel with optical axis diagonally downward.In addition, the direction of the electromagnetism resultant force of each coil 145 will not towards or the back of the body
To the spring center 170.Size of current and direction by adjusting each coil 145 can adjust the size of the resultant force
And direction, reaching focusing, (moving structure is toward the displacement in z directions；The direction of z-axis and optical axis is consistent) and optical anti-vibration (Rx
And RyIt is the inclined light shaft in direction, rear to claim to move axis) effect.
When auto-focusing is closed and optical anti-vibration is opened, the moving structure comprising camera lens will appear situations below：
1) moving structure, only can be to R hardly to the displacement of z directionsxAnd RyDirection tilts；2) because of total resultant force of all electromagnetism resultant forces
The component in x and y directions can be included, spring center is caused toward the displacement of x and y directions so can reach；3) total resultant force can make work
Used in the torque of moving structure, rotated up to the moving structure comprising camera lens is caused around spring center；4) the displacement and rotation
After (the 2nd and the 3rd point of situation) is integrated, moving structure and camera lens optical axis can actually surround a point and rotate, which is known as moving
Axis center.By adjusting the direction of each coil electromagnetism resultant force, x the and y directions spring constant of oscillator spring system (is kxAnd
ky) and RxAnd RyDirection spring constant (is кxAnd кy), the position for moving axis center can be adjusted.It please join shown in Fig. 5 c, it is assumed that
Total electromagnetism resultant force of all coils is f；The x durection components of f are fx；The R that f makes spring centeryYawning moment is τy.Institute
Spring center is stated toward the displacement (d in x directionsx)、fxAnd kxRelationship be：dx=fx/kx(1)；Y- moves shaft angle degree (θy)、τyAnd кy's
Relationship is：θy=τy/кy(2)；Move the distance between axis center and spring center (Dz) be：Dz=dx/tanθy≈dx/θy(because
θyVery little, generally less than 3 degree)=fxкy/kxτy(substituting into equation (1) and (2)) (3).
Adjust the direction of each coil electromagnetism resultant force, thus it is possible to vary fxAnd τyRelationship；The design of each piece of shrapnel is adjusted, it can be with
Change кyAnd kxRelationship.According to equation (3), by adjusting fx、кy、kxAnd τy, it is direction and the bullet for adjusting the resultant force
The design of piece can adjust and move position (and D of the axis center relative to spring centerzIt is related).
Attached drawing 6a is that description moves stabilization effect of the axis center in optical centre.Before shake, it is imaged on image sensor
Center；After shake, imaging deviates from the center of image sensor；(it is that optical axis is revolved around optical centre after axis is moved
Turn) because optical centre and imaging be not therefore mobile, the migration imagery that shake is made can not be compensated, is failed up to cause
Stabilization effect.Stabilization effect of the attached drawing 6b descriptions when moving the axis center heart in image sensors.After axis is moved, imaging can return
Position (being image sensor center) before shake, therefore stabilization effect can be reached.So move axis center position and stabilization effect
Fruit is that have much relations, moves axis center and is unfavorable for stabilization effect close to optical centre.Therefore, axis center is moved preferably far from optics
Center.
The diamagnetic interference optical anti-vibration voice coil motor of the present embodiment has at least three groups of magnetites and at least three coils,
The function of three-dimensional auto-focusing and optical anti-vibration can be supported simultaneously.For example, when the quantity of coil and magnetite group is three,
Assuming that optical center is center, camera lens looks up, and three groups of magnetites, three groups of coils are distributed in 0,120 and 240 degree of direction respectively.
When the Impact direction of three coils is upward, when size is identical, camera lens is along during optical axis displacement.When camera lens needs to tilt to 0 degree of direction
When, the power positioned at 0 degree of coil becomes smaller, remaining power then becomes larger.When camera lens is needed to 60 degree of directions inclinations, positioned at 240 degree
The power of coil becomes larger, remaining power then becomes smaller.
Please Fig. 7 and Fig. 8, show the voice coil motor 100 in impulse stroke and move axis before (be that optical anti-vibration is closed
When), the electromagnetic force for acting on the coil 145 by four (two groups) magnetites forms two resultant force (f1And f3) and the spring
The position at center 170.Size and direction by four 145 electric currents of coil of control, can be in each coil 145 of independent control
The size of resultant force and direction, so as to control camera lens make both direction shifting axis (x and y directions, for optical anti-vibration) and one
Along the displacement (z directions, for auto-focusing) of optical axis.Because the resultant force size of each coil 145 is very close, each line
Component of the resultant force of circle 145 on x and y directions offsets each other, and direction and the optical axis of total resultant force of all coils 145 are put down
Row, makes the camera lens carrier 140 achieve the effect that auto-focusing along the optical axis displacement.In the above embodiment, pass through tune
Whole first magnet 152 and the size of second magnet 154 and the position of the coil 145, so as to make resultant force f1And it closes
Power f3It tilts upward, towards the optical axis, but is not towards or backwards to the spring center 170.In addition, the spring center
170 about at the center of the camera lens carrier 140.
It please join Fig. 9 and Figure 10, it (is optical anti-vibration quilt in impulse stroke and after shifting axis to show the voice coil motor 100
During opening), two resultant force (f1And f3), the spring center 170 and it is described move axis center 180 position.In this case,
The resultant force f3Become larger, the resultant force f1Become smaller, the size of remaining resultant force is constant.Therefore, the spring center 170 is to x positive directions
Displacement, and the optical axis deflects.So as to which the camera lens carrier 140 and the optical axis be made to be revolved around the shifting axis center 180
Turn, the lower section moved axis center 180 and fade to the spring center 170, and beyond first shrapnel 130 and second bullet
The position of piece 131 and close to the position of the image sensor.
It please join Figure 11, show the spring center 170 close to the benefit for including camera lens moving structure center of gravity 182.In this feelings
Under condition, when camera lens is towards horizontal direction, moving structure center of gravity 182 and the position of the spring center 170 are very close, gravity
fgThe torque for acting on formation at the spring center 170 is very small, causes the inclination that the optical axis 181 generates also very small.
Therefore, gravity fgInfluence to image edge resolution can be ignored, so as to effectively be lifted under different directions take pictures
Image edge resolution.
It please join shown in Figure 12, the optical anti-vibration voice coil motor that can change shifting axis center provided for second embodiment of the invention
Structure diagram, the structure of the voice coil motor 100 in the structure and first embodiment of the voice coil motor 100a in the present embodiment
It is similar, the difference lies in：Voice coil motor 100a in the present embodiment is only provided with positioned at the lower section of the camera lens carrier 140a
The first shrapnel 130a, and the camera lens carrier 140a other positions and equipped with setting elastic piece structure, it is difficult to reduce production
Degree and cost.Other structures in the present embodiment are identical with the structure in first embodiment, and details are not described herein.
In addition, in other embodiments, pressure ring can also be omitted.In other embodiments, displacement biography can be further increased
Sensor, such as hall effect sensor allow to change the optical anti-vibration voice coil for moving axis center using close-loop control mode driving energy
Motor, up to cause auto-focusing or optical anti-vibration effect.
It please join shown in Figure 13, can change the one of the optical anti-vibration voice coil motor for moving axis center to be provided in an embodiment of the present invention
Kind assembly method.The assembly method includes：
Step S200:Coil 145 is formed on the wrapping post and boss 143 that live wire is wound on camera lens carrier 140；
Step S202：First shrapnel 130 is placed on 140 lower section of camera lens carrier, and enables 140 lower section of camera lens carrier
Wrapping post pass through first shrapnel 130 on hole；
Step S204：First shrapnel 130 and the camera lens carrier 140 are mechanically connected；
Step S206：First shrapnel 130 is carried out circuit with live wire to connect；
Step S208：Pressure ring 120 is placed on to the lower section of the first shrapnel 130, and is mechanically connected；
Step S210：First shrapnel 130 is placed on to the top of pedestal 110, then by first shrapnel 130 and institute
It states pedestal 110 to be mechanically connected, then first shrapnel 130 is electrically connected with the conductive part on the pedestal 110；
Step S212：Magnet group 150 is fixed on the inner wall of shell 160, the camera lens carrier 140 is placed in described outer
Inside shell 160, and ensure that each coil 145 is opposite with a magnet group 150；
Step S214：The bottom of first shrapnel 130 and the first magnet 152 is mechanically connected；
Step S216：Second shrapnel 131 is placed on to the top of the camera lens carrier 140, and is enabled on the camera lens carrier 140
The wrapping post of side passes through the hole on second shrapnel 131, and second shrapnel 131 and 140 machinery of the camera lens carrier are connected
It connects, then second shrapnel 131 is subjected to circuit with live wire and is connect.
Can change the optical anti-vibration voice coil motor for moving axis center and its assembly method in the embodiment of the present invention at least have
Some following advantageous effect：
It (1), can be in each coil 145 of independent control by controlling the size of electric current and direction in four coils 145
The size of resultant force and direction, so as to control camera lens can make both direction translation (x and y directions, for optical anti-vibration) and one
Along the displacement (z directions, for auto-focusing) of optical axis 180, therefore, the optical anti-vibration voice coil motor 100 for moving axis center can be changed
Auto-focusing and optical anti-vibration can be supported simultaneously；
(2) magnet group 150 is located in motionless structure, so can change the optical anti-vibration voice coil motor 100 for moving axis center
Performance is not susceptible to extraneous magnetic field influence；
(3) the optical anti-vibration voice coil motor 100 for moving axis center can be changed using camera lens translation mode, up to cause optical anti-vibration
Effect, and lower the influence to image edge resolution；
(4) by setting pressure ring 120, for relatively thin shrapnel 130, the thickness of matrix 122 is thicker, can be effectively
Relatively thin shrapnel 130 is protected to enhance anti-dropping power；Moreover, pressure ring 120 can guarantee that shrapnel 130 is driven plain below camera lens carrier 140,
Can reduce because focus caused by 130 injustice of shrapnel movable inclined and initial current error the problems such as, increase can change shifting axis in
The consistency and production yield of the optical anti-vibration voice coil motor 100 of the heart；
(5) by the way that the first extension 1241 and notch 148 is enabled to coordinate, with the second extension 1243 of season and third extension
149 are arranged alternately along the circumferential direction of ontology 141 and are continuously contacted with along the circumferential direction and stage portion 118 of ontology 141, so as to effectively
The gap between camera lens carrier 140 and pedestal 110 is reduced, external dust can be prevented between camera lens carrier 140 and pedestal 110
Gap enter the optical filter or image sensor of 140 lower section of the lower section of camera lens carrier 140 pollution camera lens carrier, and then described in enhancing
The reliability of camera model；
(6) it is simple in structure, motor reliability can be improved and lower production difficulty and cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of can change the optical anti-vibration voice coil motor for moving axis center, it is characterised in that：Including pedestal, at least one shrapnel,
Camera lens carrier, at least three magnet groups, shell and for dust-proof pressure ring；Each magnet group includes at least a magnet；Its
In, the pedestal, the shell and the magnet group, which link together, forms motionless structure；At least three magnets group setting
On the inner wall of the shell；The camera lens carrier includes the coil of ontology and setting on the body；The coil and institute
It states ontology to link together, forms bascule；The number of the coil is identical with the number of the magnet group；The coil with
The magnet group is oppositely arranged one by one, and the coil is provided with the first line end and the second line end；At least one shrapnel connection
The camera lens carrier and the magnet group and form a multivariant mass-spring system, the multivariant spring vibration
Subsystem includes a spring center；At least three conductive paths, first line end and described are provided on the shrapnel
Both ends of the two wire terminal respectively with the conductive path are electrically connected；At least one shrapnel direct or indirect connection institute on circuit
The conductive material in coil and the pedestal is stated, the pressure ring is arranged between the pedestal and the shrapnel, and the pressure ring will
The shrapnel is pressed in the lower section of the camera lens carrier, and is connect with the shrapnel；The direction of the electromagnetism resultant force of each coil is neither
Towards also not backwards to the spring center, and not parallel with camera lens optical axis；During optical anti-vibration, camera lens carrier is around shifting axis
Center rotating, the shifting axis center and spring center are in different location.
2. as described in claim 1 can change the optical anti-vibration voice coil motor for moving axis center, which is characterized in that each magnet group
Including the first magnet and the second magnet；First magnet is arranged on the pedestal；Second magnet, which is folded, is located at described
On one magnet, first magnet is different with the size or shape of second magnet, and first magnet and described second
The magnetic direction of magnet is opposite.
3. as described in claim 1 can change the optical anti-vibration voice coil motor for moving axis center, which is characterized in that on the pedestal
It is formed with positioning region；The camera lens carrier further includes the locating slot to be formed on the body；The positioning region and the positioning
Slot coordinates.
4. as claimed in claim 2 can change the optical anti-vibration voice coil motor for moving axis center, which is characterized in that described at least one
A shrapnel includes the first shrapnel, and a part for first shrapnel is connect with the bottom of the pedestal and the ontology；Described
Another part of one shrapnel is connect with the bottom of first magnet.
5. as claimed in claim 2 can change the optical anti-vibration voice coil motor for moving axis center, which is characterized in that described at least one
A shrapnel includes the first shrapnel and the second shrapnel, and a part for first shrapnel connect with the top of the pedestal, and described the
Another part of one shrapnel is connect with the bottom of first magnet；Second shrapnel is connected to the upper of the camera lens carrier
Side, and top and the cage connection of second shrapnel with second magnet.
6. as claimed in claim 5 can change the optical anti-vibration voice coil motor for moving axis center, which is characterized in that the pressure ring packet
Include the multiple extensions of cricoid matrix and formation on the matrix；The shrapnel is pressed in the camera lens carrier by described matrix
Lower section, and connect with the shrapnel；The camera lens carrier further includes the multiple notches to be formed on the body；The pedestal
Including substrate, through-hole is formed on the substrate；The pedestal further includes the step to extend internally from the inner surface of the substrate
Portion；The multiple extension along described matrix it is arranged circumferentially spaced on the inner surface of the matrix；Each extension
Including the first extension and the second extension；First extension extends and extends from described matrix towards the camera lens carrier
On to the camera lens carrier in corresponding notch；Second extension extends and extends to from described matrix towards the pedestal
It is contacted with the stage portion on the pedestal.
7. as claimed in claim 6 can change the optical anti-vibration voice coil motor for moving axis center, which is characterized in that the camera lens carries
Body further includes the multiple third extensions to be formed on the body；The notch and the third extension are along the ontology
Circumferential direction be arranged alternately；The third extension extends from the ontology towards the stage portion and is contacted with the stage portion.
8. as claimed in claim 7 can change the optical anti-vibration voice coil motor for moving axis center, which is characterized in that described second prolongs
Extending portion and the third extension are arranged alternately along the circumferential direction of the ontology and along circumferential direction and the steps of the ontology
Portion continuously contacts with.
9. a kind of assembling that can change the optical anti-vibration voice coil motor for moving axis center as any one of claim 6-8
Method, including：
The coil is formed on the wrapping post and boss that live wire is wound on the camera lens carrier；
First shrapnel is placed below the camera lens carrier, and the wrapping post below the camera lens carrier is enabled to pass through described the
Hole on one shrapnel；
First shrapnel and the camera lens carrier are mechanically connected；
First shrapnel is carried out circuit with the live wire to connect；
The pressure ring is placed below first shrapnel, and is mechanically connected；
First shrapnel is placed on above the pedestal, first shrapnel is mechanically connected with the pedestal, then will
First shrapnel is electrically connected with the conductive part on the pedestal；
The magnet group is fixed on the inner wall of the shell, the camera lens carrier is placed in the enclosure, and ensure
Each coil is opposite with a magnet group；
The bottom of first shrapnel and first magnet is mechanically connected；
Second shrapnel is placed on to the top of the camera lens carrier, and it is described that the wrapping post above the camera lens carrier is enabled to pass through
Hole on second shrapnel, by first shrapnel and described while second shrapnel and the camera lens carrier are mechanically connected
Live wire carries out circuit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510622131.8A CN105099119B (en) | 2015-09-25 | 2015-09-25 | It is a kind of to change the optical anti-vibration voice coil motor and its assembly method for moving axis center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510622131.8A CN105099119B (en) | 2015-09-25 | 2015-09-25 | It is a kind of to change the optical anti-vibration voice coil motor and its assembly method for moving axis center |
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| Publication Number | Publication Date |
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| CN105099119A CN105099119A (en) | 2015-11-25 |
| CN105099119B true CN105099119B (en) | 2018-06-26 |
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| CN201510622131.8A Expired - Fee Related CN105099119B (en) | 2015-09-25 | 2015-09-25 | It is a kind of to change the optical anti-vibration voice coil motor and its assembly method for moving axis center |
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| WO2020074900A1 (en) * | 2018-10-10 | 2020-04-16 | Cambridge Mechatronics Limited | Actuator assemblies and methods of controlling the same |
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