CN102902038A - Lens drive device, automatic focusing camera and portable terminal device - Google Patents
Lens drive device, automatic focusing camera and portable terminal device Download PDFInfo
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- CN102902038A CN102902038A CN2012102649224A CN201210264922A CN102902038A CN 102902038 A CN102902038 A CN 102902038A CN 2012102649224 A CN2012102649224 A CN 2012102649224A CN 201210264922 A CN201210264922 A CN 201210264922A CN 102902038 A CN102902038 A CN 102902038A
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Abstract
Provided is a lens drive device, an automatic focusing camera and a portable terminal device. In the lens drive device employing a magnet used for a Hall element sensor and a position detection assembly of the Hall element sensor to perform shake correction after being used, influences on the magnet used for the Hall element sensor and the Hall element sensor caused by a drive magnet can be prevented. A plurality of drive magnets (20) are configured at certain intervals between the adjacent drive magnets (20) on the circumferential direction of an annular collar extension (2); a cutting portion is formed on the side surface opposite to the adjacent other drive magnets (20) of the drive magnets (20); and the intervals between the position detection assembly composed of the magnet (29) used for the Hall element sensor and the Hall element sensor (27) and the drive magnets (20) are enlarged; so that the effect of the magnetic field generated by the drive magnets (20) on the position detection assembly can be inhibited.
Description
Technical field
The present invention is relevant a kind of lens driver, particularly about a kind of be equipped in the mobile phone etc., to the lens driver that the lens of wherein auto-focus camera drive, it has the lens supports body that extends to than length direction, the tubular of configuration coil on outer circumferential side; Be disposed at the collar extension of the ring-type on the described lens supports body radial outside; In the inboard of the outer perimeter wall of the ring-type perisporium that consists of described collar extension, on the outside of described described coil radially, and vacate respectively certain intervals between the described coil and dispose a plurality of driving magnetites; Described a plurality of driving with magnetite on the Zhou Fangxiang of described collar extension respectively and the driving of adjacency vacate the certain intervals configuration between with magnetite, be located on the Zhou Fangxiang of described collar extension described driving with 2 drivings of adjacency in the magnetite with on the position between the magnetites, have the hall element sensor that is configured on the described lens supports body with magnetite and be configured in Hall element on the base that described collar extension and lens supports body are installed.
Background technology
Lens driver to the auto-focus camera of the mobile communication terminal that is equipped on mobile phone etc. just had various motions in the past.
Such as, in patent document 1 (JP 2007-139810 communique), proposal is to support the inboard that the tubular lens supports body of the lens of auto-focus camera is disposed at the ring-type collar extension.Coil configuration on the side face of described lens supports body, on the inboard of described collar extension, radially the described coil outside, and is vacated respectively certain intervals and disposed a plurality of driving magnetites between the described coil.On the inboard of described collar extension, and to vacate a plurality of driving magnetites that certain intervals is configured between the described coil be that adjacent each drives and vacate certain intervals with magnetite and be configured on the Zhou Fangxiang of described collar extension.This lens driver is to produce on the basis in magnetic field with magnetite according to described driving, the electric current that flows through described coil is controlled, according to electromagnetic force, described lens supports body is moved with the X-axis/Y direction of optical axis (Z axis) phase quadrature to the optical axis direction (Z-direction) of lens and/or person.
Being directed in the past makes the control of the lens driver that the lens supports body moves to Z-direction and/or person's X-axis/Y direction, be by the lens supports body is provided to Z-direction grant driving force the Z drive division, to the lens supports body provide to X-axis/Y direction grant driving force X-Y drive division, portrait sensor, polymerization focal point control section, shake dynamic sensor, the control part that rocks control part, position probing assembly etc. carries out.
Therefore, the position probing assembly generally constitutes, described a plurality of drivings with magnetite in adjacency be positioned at 2 drivings with the magnetite centre positions on, with magnetite (following suitably referred to as " sensor magnetite "), assemble hall element sensor at the base that described collar extension and lens supports body are installed at described lens supports body configuration hall element sensor.
Summary of the invention
To adopting in the rolling normal moveout correction that described hall element sensor is used with the position probing assembly of magnetite and hall element sensor, follow the miniaturization/thinning of lens driver, drive and also have to dwindle with the interval between the magnetite with magnetite and sensor.As drive with magnetite and sensor and can't be guaranteed fully with the distance between the magnetite, then may produce the effect of attractive force and repulsive force between the two.When lens driver is assembled, driving with magnetite and sensor described attractive force and in a single day effect of repulsive force between the magnetite, then might produce certain impact to assembling operation.In addition, when the lens driver start, in a single day sensor is exerted an influence with magnetite and hall element sensor with magnetite as driving, then might produce obstacle to stabilization signal output and the start of sensor.
Therefore, the purpose of this invention is to provide a kind of scheme, to having adopted hall element sensor to utilize in the lens driver of rear enforcement rolling normal moveout correction with the position probing assembly of magnetite and hall element sensor, can prevent with the impact that magnetite and hall element sensor cause to hall element sensor with magnetite driving.
For realizing the lens driver of described purpose, has the lens supports body that extends to than length direction, the tubular of configuration coil on outer circumferential side; Be disposed at the collar extension of the ring-type on the described lens supports body radial outside; In the inboard of the outer perimeter wall of the ring-type perisporium that consists of described collar extension, on the outside of described described coil radially, and vacate respectively certain intervals between the described coil and dispose a plurality of driving magnetites; Described a plurality of driving with magnetite on the Zhou Fangxiang of described collar extension respectively and the driving of adjacency vacate the certain intervals configuration between with magnetite; Be located on the Zhou Fangxiang of described collar extension described driving with 2 drivings of adjacency in the magnetite with on the position between the magnetites, have the hall element sensor that is configured on the described lens supports body with magnetite and be configured in Hall element on the base that described collar extension and lens supports body are installed; Be characterized in as the output voltage that produces on the hall element sensor not being impacted, forming cut portion with the driving of the adjacency of the position of magnetite with the side of magnetite subtend corresponding to hall element sensor, so that the length that drives the sort of degree that can not impact with the magnetic field of magnetite sensor with the magnetic field of magnetite is set in driving that should adjacency for the size at the interval between the magnetite.
Described lens driver, its further characteristics be, described cut portion at least described be formed in than length direction described hall element sensor with the described driving of magnetite institute subtend with on the face of magnetite.
Described lens driver, its further characteristics are that described cut portion is positioned at the base side that drives with the top ends of magnetite.
A kind of auto-focus camera is characterized in, has aforesaid lens driver.
A kind of mobile communication terminal is characterized in, is equipped with aforesaid auto-focus camera.
According to the present invention, to having adopted hall element sensor to utilize in the lens driver of rear enforcement rolling normal moveout correction with the position probing assembly of magnetite and hall element sensor, can provide a kind of lens driver that hall element sensor is exerted an influence with magnetite and hall element sensor with magnetite that prevents from driving.
Description of drawings
The exploded perspective view of the lens driver of [Fig. 1] relevant the present invention the 1st embodiment.
[Fig. 2] is that the part of the lens driver of the 1st embodiment of the present invention has been carried out the abridged oblique view (a).(b) be the A-A section profile figure of (a).
[Fig. 3] carried out the abridged oblique view to the part of the lens driver of the 2nd embodiment of the present invention.
[Fig. 4] is that the part of the lens driver that in the past had the correction mechanism of rocking has been carried out the abridged oblique view (a).(b) be the B-B section profile figure of (a).
[Fig. 5] is the illustraton of model that is disposed at the locational hall element sensor of subtend and sensor usefulness magnetite (a).(b) be result from sensor with on magnetite position and the hall element sensor and hall output voltage between concern synoptic diagram.
11,11a lens driver
13 frameworks
15 bases
17 lens supports bodies
18 coils
The 18a main coil
The 18b secondary coil
20,31 driving magnetites
22 collar extensions
26 intervals
27 hall element sensors
29 hall element sensor magnetites
The 31a notch
34 intervals
Embodiment
The present invention is applicable to have on the lens driver of the correction mechanism of rocking.This rocks correction mechanism and has the position probing assembly that the lens supports body of the lens that support auto-focus camera is carried out position probing.This position probing assembly for example is to adopt to be made of with magnetite and hall element sensor hall element sensor.
Use Fig. 4 (a) and (b), the lens driver in the past that the present invention was suitable for is illustrated.In Fig. 4 (a) and (b), for making lens supports body 102 obtain driving, ought to the driving that be disposed on the collar extension 105 be given clearly dotting exterior framework 111 with the configuration relation between the magnetite 108 with magnetite 103 and hall element sensor 107 and sensor.In addition, in Fig. 4 (a), omitted the diagram of collar extension 105, main coil 109 and secondary coil 110.
Framework 111 is made of framework 120 and base 121.Framework 120 is configured in the object side (upside of Fig. 4 (a)) of optical axis direction (arrow 113 directions), and base 121 is configured in knot as side.
The ring-type collar extension 105 that lens driver 101 has lens supports body 102 and disposing in the outside radially of lens supports body 102.Lens supports body 102 be the optical axis direction of lens that on this, disposing (without diagram) suitable, extend to the cylindrical portion material than length direction (direction shown in the arrow 113).Coil (main coil 109, secondary coil 110) is disposed on the outer circumferential side of lens supports body 102.
To have consisted of on the inboard of outer perimeter wall 105a of perisporium of ring-type of collar extension 105, the coil outside radially dispose and coil between a plurality of drivings of vacating at regular intervals respectively with magnetites 103.A plurality of drivings usefulness magnetites 103 at regular intervals, are configured in the driving of adjacency with between the magnetite 103 on the Zhou Fangxiang of collar extension 105.In illustrated example, see on the plane on each bight of the collar extension 105 that is square shape that configuration driven just has been configured in magnetite 103 on the Zhou Fangxiang of collar extension 105 with 103,4 drivings of magnetite respectively as required, vacate with 90 degree intervals each other.
Such as Fig. 4 example, be disposed at the coil on lens supports body 102 outer circumferential sides, it is made of the secondary coil 110 that is wound in the main coil 109 on lens supports body 102 outer peripheral faces and is disposed at the outer periphery radially of main coil 109.Main coil 109 is firmly fixed on the periphery of lens supports body 102, and secondary coil 110 is firmly fixed on lens supports body 102 after getting involved main coil 109.As mentioned above, use between the magnetite 103 at secondary coil 110 and driving, upwards be formed with certain interval in the footpath of lens supports body 102.
In the legend, the subtend face that drives with magnetite 103 and lens supports body 102 sides is to see that from optical axis direction (direction shown in the arrow 113) its plane is to be formed on the crooked curved surface.Approximate L word shape is seen on the plane, is the shape of extending to collar extension 105 all directions.
On collar extension 105 all directions, the position of 103 of magnetites is used in 2 drivings that are in adjacency, and hall element sensor is disposed on the lens supports body 102 with magnetite 108, and Hall element 107 is configured on the base 121 that collar extension 105 and lens supports body 102 are installed.
As shown in Figure 4, in the assembled state, hall element sensor 107 and sensor with magnetite 108 by vacating mutually each other subtend of certain intervals.Like this, the position probing assembly that detects lens supports body 102 positions is to consist of with magnetite 108 by hall element sensor 107 and sensor, and these 2 drivings that are disposed at adjacency are with between the magnetite 103.
In the lens driver shown in Figure 4, the position probing assembly that disposes is to have utilized Hall-effect, detects the position with the lens supports body 102 of the X-direction of optical axis direction (Z-direction shown in the arrow 113) phase orthogonal directions and/or person's Y direction
Shown in Fig. 5 (a) like that, in the sensor magnetite 108 with the X-direction of optical axis direction phase quadrature or Y direction on the configuration N utmost point and the S utmost point.Adopting this hall element sensor is to have utilized when be electrified stream on hall element sensor 107 after with the correction mechanism of rocking of magnetite 108 and hall element sensor 107, when giving magnetic field from the outside, with the Hall-effect that has produced electric power (hall output voltage) on the perpendicular direction in magnetic field.Shown in Fig. 5 (b), use corresponding magnetic field, magnetite 108 positions according to the sensor that produces magnetic field, detect the hall output voltage value of hall element sensor 107 by determinator (without diagram), further according to calculation apparatus (without diagram), calculate the position of lens supports body 102 on X-direction and/or person's Y direction.
According to lens driver 101, make lens supports body 102 move to the control of the optical axis direction (Z-direction) of lens (without diagram) and make mobile to the control of rocking calibration function of the X-axis/Y direction of optical axis (Z axis) phase quadrature, be by have described hall element sensor with the position probing assembly of magnetite 108 and hall element sensor 107, without illustrated Z drive division, X-Y drive division, draw a portrait sensor, polymerization focal point control section, shake dynamic sensor, the control part that rocks control part etc. carries out.
At this, Z drive division, X-Y drive division are respectively the drive divisions that applies driving force to lens supports body 102 to Z-direction and X-axis/Y direction.In addition, the rolling dynamic sensor is to consist of according to the gyro sensor that is fixed on the camera body that is equipped with lens driver 101 etc.
Polymerization focal point control section moves to the polymerization focal position for making lens supports body 102 after the output that receives the portrait sensor, tries to achieve necessary current value, exports to the Z drive division.The Z drive division is receiving after the output of polymerization focal point control section, to main coil 109 logical certain electric currents, lens supports body 102 is moved to the polymerization focal position.
The control of rocking of rolling normal moveout correction is the signal that rocks that rolling dynamic sensor place is transmitted to be exported, for lens supports body 102 is moved this counteracting to the moving target position of specified X-axis, Y direction.
That rocks control rocks control part (without diagram), receive transmit from the rolling dynamic sensor rock signal output after, seek the moving target position and current value of X-axis that lens supports body 102 moves, Y direction after, export to the X-Y drive division.The X-Y drive division is selected specific secondary coil 110 in 4 secondary coils 110 receiving after rock the output that control part transmits, only to the secondary coil 110 logical electric currents of going up certain values of this selection place.Thus, the electric current of institute's definite value is exactly the current value that lens supports body 102 can exceed described moving target position.
In addition, rock control part according to the output at hall element sensor 107 places that consist of the position probing assembly, as mentioned above, can seek the X-axis of lens supports body 102, the existing position of Y direction.Then, after judging lens supports body 102 and being in moving target position, rest on the moving target position for making, the electric current of circulation on the described secondary coil 110 is carried out current switching, export to the X-Y drive division.The X-Y drive division is receiving after rock this output that control part comes, for allowing lens supports body 102 rest on the moving target position, with fixed electric current output to described secondary coil 110.Accordingly, lens supports body 102 stops after will moving to the moving target position of X-axis, Y direction.
Like this, control that lens supports body 102 moves to Z-direction and/or person's X-axis/Y direction and the control of rolling normal moveout correction are carried out.
For this reason, after utilizing the hall element sensor that consists of described position probing assembly to use magnetite 108 and hall element sensor 107, the X-axis of paying attention lens supports body 102, the position of Y direction are very important.
Shown in Fig. 4 (a), the occasion of lens driver 101 in the past, in case lens driver 101 miniaturization/thinning just are difficult to guarantee with the distance between the magnetite 103 with driving with the position probing assembly that magnetite 108 consists of by the hall element sensor 107 of each other subtend separated by a certain interval and sensor.For this reason, position probing assembly and driving just diminish with the interval between the magnetite 103.
Namely, in case lens driver 101 miniaturization/thinning are between the driving of the Zhou Fangxiang of collar extension 105 adjacency is with magnetite 103, the driving of at regular intervals configuration will diminish with the interval between the side of 103 subtends of magnetite and the position probing assembly that is made of with magnetite 108 hall element sensor 107 and sensor with the driving of the adjacency in the magnetite 103.
For this reason, drive with just causing attractive force and repulsive force between magnetite 103 and the sensor magnetite 108.When assembling lens driving device 101, between driving with magnetite 103 and sensor magnetite 108 as in case this attractive force and repulsive force work, just might produce obstruction to assembling operation.In addition, when lens driver 101 actions, exert an influence with magnetite 108 and hall element sensor 107 with 103 pairs of sensors of magnetite in case drive, just might produce obstacle to stabilization signal output and the action of sensor.In case produce this situation, just can't calculate the tram of lens supports body 102, may bring obstruction to rocking calibration function.
The objective of the invention is, in the occasion of lens driver miniaturization/thinning, issuable this unfavorable condition is made advance preventing.
Adopted the lens driver 101 of Fig. 4 (a) and (b) structure in the past, what clearly demonstrate as described is such, described unfavorable condition is being carried out on the basis that prevents, suppressed to have very large meaning to driving with magnetite 103 to the magnetic fields that the position probing assembly that is made of with magnetite 108 hall element sensor 107 and sensor produces.For example, the increase according to interval between position probing assembly and the driving usefulness magnetite 103 drives the magnetic fields that produces with 103 pairs of positions of magnetite detection components and just might be inhibited.
The present invention is based on this kind discussion and carries out.
For this reason, for reaching described purpose, in the present invention, drive with other driving of magnetite adjacency and adopted the structure that forms cut portion with the side of magnetite institute subtend.
Accordingly, even if lens driver is implemented miniaturization/thinning, also might make the position probing assembly and drive with the interval between the magnetite to become large, suppress to drive with the magnetic fields of magnetite to the position detection components.
As mentioned above, adopt the occasion that forms the cut portion structure driving to drive with the side of magnetite institute subtend with other of magnetite adjacency, described cut portion on than length direction, can be formed at hall element sensor with the driving of magnetite institute subtend with the magnetite face on.
In than length direction, cut portion only is formed at hall element sensor and uses on the face of magnetite with the driving of magnetite institute subtend, accordingly, can reduce from driving the part of excising with magnetite.Thus, can suppress to drive the magnetic fields that the position detection components is produced with magnetite on the one hand, also can suppress on the other hand to drive with magnetite and cause driving to use the low of thrust to the lens supports body.
According to the present invention, even if the lens driver miniaturization/thinning drives with magnetite the magnetic fields that the position detection components produces has been obtained inhibition, prevented from driving with magnetite and sensor with the effect that produces attractive force and counter-attraction between the magnetite.Lens driver impacts sensor stable signal output and the danger that produces obstacle of moving with magnetite and hall element sensor sensor thereby prevented from advance driving with magnetite when action.
This result is, even if the lens driver miniaturization/thinning, lens driver can prevent from driving the obstacle that with the attractive force that produces between the magnetite and repulsive force effect assembling operation is produced with magnetite and sensor when assembling.In addition, lens driver impacts, makes the stabilization signal output of sensor and action obstacle to occur, the tram of lens supports body detected calculate produce obstruction, to rock calibration function issuable obstacle etc. can be prevented sensor with magnetite and hall element sensor to driving with magnetite when action.
And, according to the present invention, can provide a kind of: have the auto-focus camera of the lens driver that can give play to described good function characteristic and carry the mobile terminal device of this auto-focus camera.
Below with reference to the annex drawing, the desirable embodiment of the present invention is illustrated.The present invention is not limited to described example and embodiment once, can do all changes in the technical scope that the record of claim scope can be held.
[embodiment 1]
Lens driver of the present invention 11 shown in Fig. 1, Fig. 2 (a) and (b), the structure that the magnetic fields that has adopted driving with magnetite the position detection components to be produced suppresses, these are different from the lens driver in the past 101 that Fig. 4 (a) and (b) illustrate.Therefore, with the same section that illustrates in lens driver 101(Fig. 4 (a) and (b) in the past, suitably with reference to described explanation, mainly difference is partly described here.
And identical with Fig. 4 (a) and (b) explanations drives for making lens supports body 17, and the driving that ought to clearly be disposed on the collar extension 22 is closed with the configuration between the magnetite 29 with magnetite 20 and hall element sensor 27 and sensor.The framework 13 and the base 15 that consist of exterior framework dot.In addition, in Fig. 2 (a), omitted the diagram of collar extension 22, main coil 18a and secondary coil 18b.
Identical with the lens driver 101 that illustrates in Fig. 4 (a) and (b), lens driver 11 has: lens supports body 17 and be configured in ring-type collar extension 22 on the radial outside of lens supports body 17.Lens supports body 17 is that the optical axis direction (Z-direction shown in the arrow 12) that is assigned in the lens (without diagram) on this extends accordingly to the tubular than length direction.
The exterior of lens driver 11 formed by the framework that framework 13 and base 15 consist of.This framework in the optical axis direction than length direction (Z-direction shown in the arrow 12) of lens supports body 17, is in the framework 13 of object side position and base 15 tablings of framework 13 subtend positions.So the circular open section 14 that forms in the central is the casings that slightly are the Nogata shape.
For lens supports body 17 being supported on institute's allocation, front side spring 24 is assembled in the object side than the optical axis direction of length direction of lens supports body 17, i.e. sensitive side, and rear side spring 25 is assembled in the therewith imaging side of the lens supports body 17 of subtend.
On lens (without diagram) the inside all sides in footpath that remain in lens supports body 17 that are fixed.When the lens driver 11 that the shown overview of Fig. 1 exploded perspective view is consisted of is assembled, remain in lens (without diagram) on the lens supports body 17 and face in the peristome 14 of framework central authorities.
In illustrated example, be configured in coil 18 on lens supports body 17 outer circumferential sides and be by the secondary coil 18b that is wound on the main coil 18a on lens supports body 17 outer peripheral faces and be configured on the radial outside of main coil 18a and consisted of.Main coil 18a is firmly fixed on the periphery of lens supports body 17.Secondary coil 18b is firmly fixed on lens supports body 17 after getting involved main coil 18a.
On the inboard of the outer perimeter wall 22a of the ring-type perisporium that consists of collar extension 22, and vacate between the secondary coil 18b on the outside of certain intervals, secondary coil 18b diametrically, drive with magnetite 20 and the configuration of secondary coil 18b subtend.
As Fig. 1, Fig. 2 (a) diagram, from upper side plane, collar extension 22 is rectangular-shaped, on the Zhou Fangxiang of collar extension 22, vacate respectively certain interval, namely on the inner peripheral surface of the outer perimeter wall 22a of 4 bight institute correspondence positions in rectangular shape, dispose each 1, add up to into 4 driving magnetite 20.In illustrated example, the outer peripheral face that drives with magnetite 20 is docked with the inner peripheral surface of the outer perimeter wall 22a of collar extension 22.
Main coil 18a is the coil take the Zhou Fangxiang of lens supports body 17 as winding direction.Secondary coil 18b is more small-sized than main coil 18a, spiral structure in the form of a ring.The secondary coil 18b that consists of of the spiral of ring-type vacates certain intervals at the Zhou Fangxiang of lens supports body 17 thus, is configured in 4 places with magnetite 20 subtends with driving.Drive with being formed with certain intervals between magnetite 20 and the secondary coil 18b.
On 4 drivings other driving side with 20 subtends of magnetite with magnetite 20 adjacency, shown in Fig. 2 (a), be formed with cut portion.Use between the magnetite 20 in the driving of adjacency, i.e. the driving of adjacency shown in Fig. 2 (a), is formed with a certain size interval 26 with between the top of magnetite 20.Among this embodiment, drive to drive on side with 20 subtends of magnetite with other of magnetite 20 adjacency and be formed with cut portion, so the interval 26 of described institute sizing, also the interval 115 more mutual than the driving usefulness magnetite 103 of the adjacency shown in Fig. 4 (a) is large.
With on the centre positions of magnetite 20, at the middle body of base 15, hall element sensor 27 begins to dispose at a certain distance from 2 drivings of adjacency each top with magnetite 20 in 2 drivings of adjacency.In addition, on the position of hall element sensor 27 subtends, dispose sensor with magnetite 29 at lens supports body 17.
The driving of adjacency is set for the interval 26 sizes (length) between the magnetite 20, drives with the magnetic field of magnetite 20 sensor not to be advisable with the degree that the magnetic field of magnetite 29 impacts.Be that the driving magnetite 20,20 of adjacency is corresponding to the position of sensor with magnetite 29, for the output voltage that produces on the Hall element 27 is not impacted, form cut portion in the driving of adjacency with the side of magnetite 20,20 subtends, set the size (length) at interval 26.
According to lens driver 11, make lens supports body 17 to the mobile control of the optical axis direction (Z-direction) of lens (without diagram) and make mobile to the control of rocking calibration function of the X-axis/Y direction of optical axis (Z axis) phase quadrature, that employing is identical with the lens driver 101 of in the past Fig. 4 (a) and (b) explanation, by carrying out as getting off.
Necessary current value is sought for lens supports body 17 is moved to the polymerization focal position by polymerization focal point control section (without diagram) after the output that reception portrait sensor (without diagram) sends, export to Z drive division (nothing diagram).The Z drive division to the logical certain electric current of main coil 18a, moves to the polymerization focal position lens supports body 17 after receiving the output of transmitting from polymerization focal point control section.
What control was rocked in implementation rocks control part (without diagram), receive send from rolling dynamic sensor (without diagram) rock signal output after, try to achieve X-axis, Y direction moving target position and current value that lens supports body 17 will move, export to X-Y drive division (without diagram).The X-Y drive division is configured to select among 4 secondary coil 18b a specific secondary coil 18b of place receiving after rock the output that control comes, and only makes lens supports body 17 surpass the current of moving target position to selected secondary coil 18b is upper on logical.
Rock the control part basis and try to achieve lens supports body 17 in the existing position of X-axis, Y direction from the output of the hall element sensor 27 of formation position probing assembly.Then, after judging lens supports body 17 and being in moving target position, for staying on this moving target position, the electric current of the upper circulation of this secondary coil 18b is switched, export to the X-Y drive division.The X-Y drive division stays on the moving target position for making lens supports body 17 receiving after rock this kind output that control part comes, with certain electric current output to secondary coil 18b.Accordingly, lens supports body 17 moves behind the moving target position of X-axis, Y direction and stops.
In the lens driver 11 of this example, the driving of adjacency magnetite 20,20 is corresponding to the position of sensor with magnetite 29, for the output voltage that produces on the hall element sensor 27 not being impacted, form cut portion in the driving of adjacency with the side of magnetite 20,20 subtends.Like this, the length that drives the sort of degree that can not impact with the magnetic field of magnetite 29 sensor with the magnetic field of magnetite 20 is set in the driving of adjacency for the size (length) at the interval 26 between the magnetite 20.
Therefore, according to this example, even if lens driver 11 is made miniaturization/thinning, sensor can be made greatly of the interval between the magnetite 20,20 of position probing assembly and driving that magnetite 29 and hall element sensor 27 consist of, can suppress the magnetic fields that produces with 20 pairs of positions of magnetite detection components from driving.
This result can be prevented with the attractive force between the magnetite 29 and repulsive force effect with magnetite 20 and sensor driving.In addition, also can prevent lens driver 11 when action, driving impacts with magnetite 29 and hall element sensor 27 with 20 pairs of sensors of magnetite, to stabilization signal output and the action generation obstacle of sensor.That is, the impact with magnetite 20 need not be activated, on hall element sensor 27, correctly suitable output voltage can be produced to sensor with the existing position of magnetite 29.This result be exactly can paying attention lens supports body 17 in the existing position of X-direction and/or person's Y direction, can really be controlled the rolling normal moveout correction.
Therefore, auto-focus camera (without diagram) according to the lens driver 11 that has adopted this embodiment, further according to the portable terminal apparatus (without diagram) of the mobile phone that has carried this auto-focus camera etc., even if with lens driver 11 miniaturization/thinning in addition, lens supports body 17 can be held in the tram of X-direction and/or person's Y direction, the function of rolling normal moveout correction can be suitably given play to.
[embodiment 2]
With reference to figure 3 other embodiment is illustrated.
With embodiment 1(Fig. 1, Fig. 2) in the same title of structure section material that arrives of explanation or structure, the description thereof will be omitted with prosign.In addition, the description identical with the part that illustrates among the embodiment 1 done suitable cutting, the main difference from Example 1 that is noted that.
In the lens driver 11 of embodiment 1, the driving of position probing assembly adjacency is used magnetite 29 positions with magnetite 20,20 corresponding to sensor, for the output voltage that produces on the hall element sensor 27 not being impacted, form cut portion in the driving of adjacency with the side of magnetite 20,20 subtends.
In the illustrated lens driver 11a of Fig. 3, the cut portion that forms on the side of the driving of adjacency with magnetite 31,31 subtends, the driving that is formed at adjacency with the side of magnetite 31,31 subtends and lens supports body 17 than length direction on subtend in hall element sensor with the driving of 29 subtends of magnetite with magnetite 31,31 face on.In Fig. 3 illustrated embodiment, be provided with otch 31a, 31a in base 15 sides that drive with magnetite 31,31 top ends.
Accordingly, can suppress to drive with magnetite 31,31 magnetic field on be disposed on the base 15 hall element sensor 27 and in hall element sensor subtend position, be disposed at the impact that position probing assembly that the sensor on the lens supports body 17 consists of with magnetite 29 causes.
Driving with magnetite 31,31 top ends, as shown in Figure 3, owing to be provided with notch 31a, 31a, identical with embodiment 1, drive and can not grant impact to hall element sensor 27 with the magnetic field of magnetite 31.On hall element sensor 27, produce and sensor with the corresponding output voltage in existing position of magnetite 29, can paying attention lens supports body 17 in the existing position of X-direction and/or person's Y direction.Accordingly, can be to definite real control of rolling normal moveout correction.
Further, drive with the driving of magnetite 31,31 remaining top ends 31b and adjacency with the interval 34 between the remaining top ends 31b of magnetite 31, can accomplish and the driving of the adjacency shown in Figure 4 size (length) of interval 115 same degree of 103 of magnetites.Therefore, compare with the structure of embodiment 1, in the present embodiment, can make littlely of cut-out in the magnetite 31,31 with driving, the possibility of the thrust reduction of lens supports body 17 has just been reduced.
In addition, the shape of notch 31a can be beyond as shown in Figure 3 rectangular-shaped, also can be fan shape, stair shape, tilted direction excision shape.Key is to give the thrust of lens supports body 17 otherwise low, the influence of magnetic field that the position detection components is caused will be controlled at irreducible minimum, be formed in this way in abutting connection with drive with the side of magnetite 31,31 subtends and lens supports body 17 than length direction in hall element sensor with the driving of magnetite 29 subtends with on the magnetite 31,31, then just it doesn't matter for the shape of notch 31a.
In the present embodiment, suppressed to drive with 31 pairs of lens supports body 17 give of magnetite with thrust low, driving is configurations separated by a certain interval with magnetite 29 and hall element sensor 27 with magnetite 31 and sensor.Therefore, can control the effect of the power of the mutual unusual attraction of two magnetites and repulsion.Further, the Effects of Anomalous that produces in the time of controlling lens driver 11a when assembling and action.
Auto-focus camera (without diagram) according to the lens driver 11a that adopts this embodiment, the portable terminal apparatus of the further mobile phone that carries this auto-focus camera etc. (without diagram), even if in the occasion of lens driver 11 being carried out miniaturization/thinning, can hold lens supports body 17 X-direction and/the correct amount of movement of Y direction, so can conscientiously give play to the function of rolling normal moveout correction.
Claims (5)
1. lens driver has the lens supports body that extends to than length direction, the tubular of configuration coil on outer circumferential side; Be disposed at the collar extension of the ring-type on the described lens supports body radial outside; In the inboard of the outer perimeter wall of the ring-type perisporium that consists of described collar extension, on the outside of described described coil radially, and vacate respectively certain intervals between the described coil and dispose a plurality of driving magnetites; Described a plurality of driving with magnetite on the Zhou Fangxiang of described collar extension respectively and the driving of adjacency vacate the certain intervals configuration between with magnetite;
Be located on the Zhou Fangxiang of described collar extension described driving with 2 drivings of adjacency in the magnetite with on the position between the magnetites, have the hall element sensor that is configured on the described lens supports body with magnetite and be configured in Hall element on the base that described collar extension and lens supports body are installed;
It is characterized in that for the output voltage that produces on the hall element sensor not being impacted, forming cut portion with the driving of the adjacency of the position of magnetite with the side of magnetite subtend corresponding to hall element sensor, so that the length that drives the sort of degree that can not impact with the magnetic field of magnetite sensor with the magnetic field of magnetite is set in driving that should adjacency for the size at the interval between the magnetite.
2. lens driver as claimed in claim 1, its feature in, described cut portion at least described be formed in than length direction described hall element sensor with the described driving of magnetite institute subtend with on the face of magnetite.
3. lens driver as claimed in claim 1 is characterized in that, described cut portion is positioned at the base side that drives with the top ends of magnetite.
4. auto-focus camera is characterized in that, has the lens driver of record in claim 1 or claim 2.
5. mobile communication terminal is characterized in that, is equipped with the auto-focus camera of claim 3 record.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011178137A JP2013033179A (en) | 2011-07-29 | 2011-07-29 | Lens drive device, autofocus camera, and portable terminal device with camera |
| JP2011-178137 | 2011-07-29 | ||
| JPJP2011-178137 | 2011-07-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102902038A true CN102902038A (en) | 2013-01-30 |
| CN102902038B CN102902038B (en) | 2015-07-01 |
Family
ID=47574371
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220369975 Expired - Fee Related CN202886709U (en) | 2011-07-29 | 2012-07-27 | Lens driving device, auto-focusing camera and portable terminal device |
| CN201210264922.4A Active CN102902038B (en) | 2011-07-29 | 2012-07-27 | Lens drive device, automatic focusing camera and portable terminal device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220369975 Expired - Fee Related CN202886709U (en) | 2011-07-29 | 2012-07-27 | Lens driving device, auto-focusing camera and portable terminal device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013033179A (en) |
| CN (2) | CN202886709U (en) |
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| CN110501797B (en) * | 2019-09-20 | 2022-09-06 | 合肥英睿系统技术有限公司 | Infrared lens device capable of automatically detecting and identifying view field |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013033179A (en) | 2013-02-14 |
| CN102902038B (en) | 2015-07-01 |
| CN202886709U (en) | 2013-04-17 |
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Owner name: XINSIKAO ELECTRIC MOTOR CO., LTD. Free format text: FORMER OWNER: SIKAO ELECTRIC MOTOR (SHANGHAI) CO., LTD. Effective date: 20150722 |
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Effective date of registration: 20150722 Address after: 314112 Jiashan City, Jiaxing province Huimin County Street, No., Jia Jia Road, building 3, 1 floor, 58 Patentee after: New math courses Electric Machine Co., Ltd Address before: 201613 No. 38 Teng Teng Road, Songjiang District export processing zone, Shanghai, China Patentee before: Shicoh Motor (Shanghai) Co., Ltd. |