CN104865775B - Jitter correction device, lens unit, camera device and driver - Google Patents
Jitter correction device, lens unit, camera device and driver Download PDFInfo
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- CN104865775B CN104865775B CN201510085201.0A CN201510085201A CN104865775B CN 104865775 B CN104865775 B CN 104865775B CN 201510085201 A CN201510085201 A CN 201510085201A CN 104865775 B CN104865775 B CN 104865775B
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- movable frame
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- fixed frame
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
Abstract
The present invention provides jitter correction device, lens unit and camera device.Jitter correction device can determine amount of movement of the above-mentioned movable frame on above-mentioned 1st direction based on the position detected by above-mentioned 1st position detection component；1st drive division includes being located at the 1st coil on the side in above-mentioned fixed frame and above-mentioned movable frame and the opposing party in above-mentioned fixed frame and above-mentioned movable frame above and at least has the 1st magnet of the magnetic pole piece of more than 3 poles in one side, by applying voltage to above-mentioned 1st coil, above-mentioned movable frame can be made to be relatively moved relative to above-mentioned fixed frame on above-mentioned 1st direction；Above-mentioned 1st position detection component detects relative position of the above-mentioned movable frame relative to above-mentioned fixed frame on above-mentioned 1st direction by detecting from magnetic field caused by above-mentioned 1st magnet；It is substantially uniform in the above-mentioned one side of above-mentioned 1st magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles and total magnetic flux sum caused by the magnetic pole piece from all S poles.
Description
Technical field
The present invention relates to jitter correction device, jitter correction device driver and the shooting with jitter correction device
The lens unit and camera device of machine, digital camera or the mobile device with camera function etc..
Background technology
In the past, in the jitter correction device on camera etc., examined using the hand shaking of angular-rate sensor etc. has been used
The hand shaking occurred on slowdown monitoring circuit detection camera, based on the detection limit, makes holding for example be used as the one of imaging lens system by the use of driver
The movable frame displacement of partial amendment lens or photographing element, and make the optical axis of photographing element and imaging optical system with respect to position
Move, thus suppress the shake of image.
In recent years, for the viewpoint for the design for improving camera etc., the tendency for it is expected fuselage slimming be present.Therefore, take
The jitter correction device being loaded on such camera etc. also requires more compact construction.On the other hand, Patent Document 1 discloses one
Kind jitter correction device, it has driver, and the driver is provided with and is magnetized with 3 magnet with upper magnetic pole.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2012-120303 publications
Driver disclosed in patent document 1 include magnet, it is relative with magnet and by energization and caused magnetic force
The lower coil relatively moved with magnet of effect and the position detection component (Hall element) for the position for detecting magnet, the magnet is in list
Side has the magnetic pole piece of more than 3.So, by using the magnet with more than 3 magnetic pole pieces, there is increase coil, Hall
The advantages of free degree of the layout of element is such.Particularly, used so-called curved in order to realize the slimming of camera etc.
During the lens barrel of bent class, because the space of thickness direction is limited, therefore, such driver can perform well in shake and repair
Equipment.
However, the driver disclosed in the patent document 1 with the magnet for possessing more than 3 magnetic pole pieces in one side is not abundant
Consider the leakage of the magnetic flux of magnetic pole piece, distinguished that diffusion of the magnetic flux to outside becomes more, another axle moving direction may be influenceed
Position detection component, cause to correct the position detection accuracy of lens or photographing element, position control accuracy declines.
The content of the invention
The present invention is to complete in view of the above problems, though have compact structure can its object is to obtain one kind
Accurately ensure driver, jitter correction device, lens unit and the camera device of shake Correction and Control.
At least one purpose in achieve these goals, reflect the 1st shake amendment dress of the side of the present invention
Put by maintaining lens or solid along the 1st direction different from each other in the face being substantially orthogonal with optical axis and the driving of the 2nd direction
The amendment of shake when the movable frame of photographing element is to be imaged, wherein,
The jitter correction device includes：Fixed frame；Movable frame, it can be relatively moved relative to above-mentioned fixed frame；1st drives
Dynamic portion, it makes above-mentioned movable frame be moved up relative to above-mentioned fixed frame in above-mentioned 1st side；2nd drive division, it makes above-mentioned movement
Frame moves up relative to above-mentioned fixed frame in above-mentioned 2nd side；1st position detection component, its detect above-mentioned movable frame relative to
The relative position of above-mentioned fixed frame；2nd position detection component, it detects above-mentioned movable frame relative to above-mentioned fixed frame above-mentioned the
Relative position on 2 directions；
Based on the position detected by above-mentioned 1st position detection component above-mentioned movable frame can be determined in above-mentioned 1st direction
On amount of movement；
Above-mentioned 1st drive division includes the 1st coil on the side in above-mentioned fixed frame and above-mentioned movable frame and is located at
The opposing party in above-mentioned fixed frame and above-mentioned movable frame is upper and at least has the 1st magnet of the magnetic pole piece of more than 3 poles in one side, leads to
Cross and voltage is applied to above-mentioned 1st coil, above-mentioned movable frame can be made to be moved relative to above-mentioned fixed frame is relative on above-mentioned 1st direction
It is dynamic；
Above-mentioned 1st position detection component detects above-mentioned movable frame phase by detecting from magnetic field caused by above-mentioned 1st magnet
For relative position of the above-mentioned fixed frame on above-mentioned 1st direction；
In the above-mentioned one side of above-mentioned 1st magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles with owning certainly
S poles magnetic pole piece caused by total magnetic flux sum it is substantially uniform.
In above-mentioned 1st magnet in one side with the magnetic pole piece of more than 3 poles, distinguish：In the presence of center magnetic pole piece (in
Entreat magnetic pole piece) and the magnetic pole piece (side magnetic pole piece) at both ends and the non-substantially uniform situation of vertical magnetic flux sum of each magnetic pole piece
Under, magnetic flux is easily to the External leakage of magnet, and therefore, the magnetic flux spilt can influence above-mentioned 2nd position detection component, may lead
The position detection accuracy of amendment lens or photographing element, position control accuracy is caused to decline.According to the present invention, by the above-mentioned 1st
The above-mentioned one side of magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles is set to be produced with the magnetic pole piece from all S poles
Raw total magnetic flux sum is substantially uniform, and the magnetic field in above-mentioned 1st magnet can be made to reach balance, so as to reduce magnetic flux to outside
Leakage, thus, it is possible to suppress the 2nd position detection component to detecting the relative position on the 2nd direction as another axle side
Influence, using the teaching of the invention it is possible to provide reduce the position detection accuracy of amendment lens or photographing element, the possibility that position control accuracy declines
Jitter correction device.
In above-mentioned 1st jitter correction device, it is preferred that in the one side of above-mentioned 1st magnet, the magnetic from all N poles
Total magnetic flux sum caused by the portion of pole is more than 0.8 times of total magnetic flux sum caused by magnetic pole piece from all S poles and is less than
1.2 times of total magnetic flux sum caused by magnetic pole piece from all S poles.It need not make caused by the magnetic pole piece from all N poles
Total magnetic flux sum and total magnetic flux sum caused by the magnetic pole piece from all S poles are completely the same, by making from all N poles
Magnetic pole piece caused by total magnetic flux sum be more than 0.8 times of total magnetic flux sum caused by magnetic pole piece from all S poles and
Less than 1.2 times of total magnetic flux sum caused by the magnetic pole piece from all S poles, you can fully reduce the leakage of magnetic flux, because
This, can suppress the influence to above-mentioned 2nd position detection component.
In above-mentioned 1st jitter correction device, it is preferred that in the one side of above-mentioned 1st magnet, the magnetic from all N poles
Total magnetic flux sum caused by the portion of pole be more than or equal to 0.85 times of total magnetic flux sum caused by magnetic pole piece from all S poles and
Less than or equal to 1.15 times of total magnetic flux sum caused by the magnetic pole piece from all S poles.By making the magnetic pole from all N poles
Total magnetic flux sum caused by portion is more than or equal to 0.85 times of total magnetic flux sum caused by magnetic pole piece from all S poles and small
In equal to 1.15 times of total magnetic flux sum caused by the magnetic pole piece from all S poles, can more effectively suppress to the above-mentioned 2nd
The influence of position detection component.
At least one purpose in achieve these goals, reflect the 2nd shake amendment dress of the side of the present invention
Put by maintaining lens or solid along the 1st direction different from each other in the face being substantially orthogonal with optical axis and the driving of the 2nd direction
The amendment of shake when the movable frame of photographing element is to be imaged, wherein,
2nd jitter correction device includes：Fixed frame；Movable frame, it can be relatively moved relative to above-mentioned fixed frame；The
1 drive division, it makes above-mentioned movable frame be moved up relative to above-mentioned fixed frame in above-mentioned 1st side；2nd drive division, it makes above-mentioned
Movable frame moves up relative to above-mentioned fixed frame in above-mentioned 2nd side；1st position detection component, it detects above-mentioned movable frame phase
For relative position of the above-mentioned fixed frame on above-mentioned 1st direction；2nd position detection component, it is relative that it detects above-mentioned movable frame
In relative position of the above-mentioned fixed frame on above-mentioned 2nd direction；
Based on the position detected by above-mentioned 1st position detection component above-mentioned movable frame can be determined in above-mentioned 1st direction
On amount of movement；
Above-mentioned 1st drive division includes the 1st coil on the side in above-mentioned fixed frame and above-mentioned movable frame and is located at
The opposing party in above-mentioned fixed frame and above-mentioned movable frame is upper and has the 1st magnet of the magnetic pole piece of 3 poles in one side, by above-mentioned
1st coil applies voltage, and above-mentioned movable frame can be made to be relatively moved relative to above-mentioned fixed frame on above-mentioned 1st direction；
Above-mentioned 1st position detection component detects above-mentioned movable frame phase by detecting from magnetic field caused by above-mentioned 1st magnet
For relative position of the above-mentioned fixed frame on above-mentioned 1st direction；
Above-mentioned 1st magnet includes being configured at the center pole portion in center and is configured at the central magnetic along above-mentioned 1st direction
The both sides in pole portion and the side magnetic pole piece different from above-mentioned center pole portion polarity, above-mentioned center pole portion is in above-mentioned 1st direction
On width be more than 0.75 times of width sum of the above-mentioned side magnetic pole piece on above-mentioned 1st direction and be less than above-mentioned side magnetic pole
1.75 times of width sum of the portion on above-mentioned 1st direction.
In order in the above-mentioned one side of above-mentioned 1st magnet, make total magnetic flux sum caused by the magnetic pole piece from all N poles with
Total magnetic flux sum caused by magnetic pole piece from all S poles approaches, make center pole portion on above-mentioned 1st direction width and
The width 1 to 1 of the side magnetic pole piece of its both sides is inadequate, it is necessary to make the width in center pole portion bigger.Because with
Centre magnetic pole piece is compared, and the magnetic flux of side magnetic pole piece is easily from side around rear side, therefore, by the width for making center pole portion
More than the width of side magnetic pole piece, rather than merely make they 1 to 1, can prevent magnetic flux around rear side well.More
For body, by making width of the above-mentioned center pole portion on above-mentioned 1st direction be more than above-mentioned side magnetic pole piece in above-mentioned 1st side
0.75 times of upward width sum and less than 1.75 times of width sum of the above-mentioned side magnetic pole piece on above-mentioned 1st direction,
Total magnetic flux sum caused by the magnetic pole piece from all N poles and total magnetic flux caused by the magnetic pole piece from all S poles can be made
It is substantially uniform to measure sum, the influence to above-mentioned 2nd position detection component can be suppressed.
In above-mentioned 2nd jitter correction device, it is preferred that width of the above-mentioned center pole portion on above-mentioned 1st direction
More than or equal to 0.8 times of width sum of the above-mentioned side magnetic pole piece on above-mentioned 1st direction and it is less than or equal to above-mentioned side magnetic pole
1.65 times of width sum of the portion on above-mentioned 1st direction.Thereby, it is possible to more effectively suppress to above-mentioned 2nd position detection part
The influence of part.
This lens unit includes above-mentioned 1st or the 2nd jitter correction device, with shot to the importing of above-mentioned solid-state imager
The optical system of multiple lens of body light and the lens barrel for keeping above-mentioned multiple lens.
In said lens unit, it is preferred that above-mentioned optical system is to include making the curved of the reflecting member of light path bending
Curved optical system.Due to making the i.e. so-called bending optical system of optical system of light path bending using reflecting member,
Therefore camera device can be thinned, but thus can produces restriction to the space for setting jitter correction device.According to this hair
It is bright, there is the 1st magnet of magnetic pole pieces more than 3 poles by using at least one side, sky limited in a thickness direction can be realized
Interior jitter correction device, therefore such camera device can be advantageously applied to.
This camera device includes said lens unit and above-mentioned solid-state imager.
At least one purpose in achieve these goals, reflect that the driver of the side of the present invention is used to shake
Correcting device, the jitter correction device pass through edge the 1st direction and the 2nd direction different from each other in the face being substantially orthogonal with optical axis
The amendment of shake when driving maintains the movable frame of lens or solid-state imager to be imaged, wherein,
Above-mentioned jitter correction device includes：Fixed frame；Movable frame, it can be relatively moved relative to above-mentioned fixed frame；1st
Position detection component, it detects relative position of the above-mentioned movable frame relative to above-mentioned fixed frame on above-mentioned 1st direction；2nd
Detection part is put, it detects relative position of the above-mentioned movable frame relative to above-mentioned fixed frame on above-mentioned 2nd direction；
Based on the position detected by above-mentioned 1st position detection component above-mentioned movable frame can be determined in above-mentioned 1st direction
On amount of movement；Above-mentioned driver includes the 1st drive division and the 2nd drive division, and the 1st drive division makes above-mentioned movable frame relative to upper
State fixed frame to move up in above-mentioned 1st side, the 2nd drive division makes above-mentioned movable frame relative to above-mentioned fixed frame the above-mentioned 2nd
Side moves up；
Above-mentioned 1st drive division includes the 1st coil on the side in above-mentioned fixed frame and above-mentioned movable frame and is located at
The opposing party in above-mentioned fixed frame and above-mentioned movable frame is upper and at least has the 1st magnet of the magnetic pole piece of more than 3 poles in one side, leads to
Cross and voltage is applied to above-mentioned 1st coil, above-mentioned movable frame can be made to be moved relative to above-mentioned fixed frame is relative on above-mentioned 1st direction
It is dynamic；
Above-mentioned 1st position detection component detects above-mentioned movable frame phase by detecting from magnetic field caused by above-mentioned 1st magnet
For relative position of the above-mentioned fixed frame on above-mentioned 1st direction；
In the above-mentioned one side of above-mentioned 1st magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles with owning certainly
S poles magnetic pole piece caused by total magnetic flux sum it is substantially uniform.
It is total caused by the magnetic pole piece from all N poles by making in the above-mentioned one side of above-mentioned 1st magnet according to this driver
Magnetic flux sum and total magnetic flux sum caused by the magnetic pole piece from all S poles are substantially uniform, can obtain the magnetic in magnet
The balance of field, leakage of the magnetic flux to outside is reduced, can be suppressed to detecting the relative position on the 2nd direction as another axle side
The 2nd position detection component influence.
" total magnetic flux " refers to the total amount of magnetic flux caused by magnetic pole piece from magnet.In the feelings for the magnetic pole piece for having multiple homopolarities
It is that the magnetic flux of each magnetic pole piece is total under condition.Total magnetic flux can be surveyed by using the magnetic flux of search coil and fluxmeter
Measure to measure.
Can be single lens or multiple it should be noted that when setting lens in jitter correction device
Lens.In addition, fixed frame, movable frame can be single components, multiple parts can also be combined and formed.
Though in accordance with the invention it is possible to obtain with compact structure but can accurately ensure to shake the drive of Correction and Control
Dynamic device, jitter correction device, lens unit and camera device.
Brief description of the drawings
Fig. 1 is the main parallax stereogram of the camera device 10 of present embodiment.
Fig. 2 is the rear perspective view of the camera device 10 of present embodiment.
Fig. 3 be represent from camera device 10 pulled down lens unit 50 after state stereogram.
Fig. 4 is to carry out cutting and in the direction of the arrow observation Fig. 3 structure institute with the structure in face of Fig. 3 including IV-IV lines
Obtained figure.
Fig. 5 is the stereogram of jitter correction device 52.
Fig. 6 is to carry out cutting and in the direction of the arrow observation Fig. 5 structure institute with the structure in face of Fig. 5 including line VI -- VI
Obtained figure.
Fig. 7 is to carry out cutting and in the direction of the arrow observation Fig. 6 structure with the structure in face of Fig. 6 including VII-VII lines
Resulting figure.
Fig. 8 is to maintain the stereogram of frame 101.
Fig. 9 is the stereogram of fixed frame 100.
Figure 10 is the stereogram for the magnet MG1 that self-sustaining frame 101 is pulled down.
Figure 11 is the magnet MG1 and yoke YK1 of comparative example 1 r sectional views.
Figure 12 is the magnet MG1 and yoke YK1 of comparative example 2 r sectional views.
Figure 13 is the magnet MG1 and yoke YK1 of embodiment r sectional views.
Embodiment
It is described with reference to the camera device of embodiments of the present invention.Fig. 1 is the camera device 10 of present embodiment
Main parallax stereogram, camera device 10 are digital cameras, and Fig. 2 is the rear perspective view of the camera device 10 of present embodiment.
Camera device 10 as digital camera has the housing 12 for forming exterior.As shown in Figure 1 and Figure 2, housing 12 has
The width of the height and size of the thickness of fore-and-aft direction, the size above-below direction bigger than the thickness left and right directions bigger than height, shape
As flat relatively thin rectangular plate-like.
As shown in figure 1, being provided with opening 12a at the position of the sidepiece of keeping right on the preceding surface top of housing 12, aftermentioned shooting is saturating
1st lens group of mirror system faces front to set in addition, being provided with the cover that can block opening 12a on preceding surface by opening 12a
Component 14.
As shown in Fig. 2 being provided with display 32 at the back side of housing 12, display 32 shows the image (picture number photographed
According to), and show operation screen or menu screen for carrying out the various setting operations related to imaging, playing etc. etc..By
Display 32 forms display part.As display 32, liquid crystal display device or organic EL display etc. can be used in the past public
The display device known.
Shutter release button 34, power switch 36 are provided with the upper surface of housing 12.Set in the right side on the rear surface of housing 12
Have a zoom operation switch 38 and multiple Operation switches 40, zoom operation switch 38 be used for by the zoom ratio of camera-lens system to
Look in the distance side (tele sides) or wide-angle side (wide sides) adjustment, multiple Operation switches 40 carry out the switching of image pickup modes, play mode
Etc. various operations, or be shown in the options purpose selection operation of the menu screen of display 32, setting item is set
Fixed operation etc..
Fig. 3 be represent from camera device 10 pull down lens unit 50 after state stereogram.Fig. 4 is with including IV-IV
The structure in face of Fig. 3 of line carries out cutting and observes the figure obtained by Fig. 3 structure in the direction of the arrow.
As shown in figure 3, it is in rectangular-shape that lens unit 50 is overall, there is lens barrel 51 and jitter correction device connected to each other
52。
In Fig. 4, lens unit 50 has the camera-lens system OS of bending class.Camera-lens system OS is from object side
Successively by the 1st lens group L1, the 2nd lens group L2, the 3rd lens group L3, the 4th lens group L4, the 5th lens group L5 and (not shown)
IR-CUT filters are formed.In addition, although not shown, but it is provided with photographing element by fixed frame 100 in the lower section of lens unit 50.
1st lens group L1 bends by concavees lens L1a, as the optical axis for making camera-lens system anti-successively from object side
The prism PZ and convex lens L1b for penetrating component are formed, and they are installed in lens barrel 51.
2nd lens group L2 be zoom lens group, the concavees lens L2a being arranged in order from object side, concavees lens L2b and
Convex lens L2c is integrally installed on retainer HLD1, and can be moved relative to lens barrel 51 along optical axis direction.
3rd lens group L3 is made up of 1 convex lens, is installed on lens barrel 51.4th lens group L4 is the saturating of zoom and focusing
Microscope group, the concavees lens L4a and convex lens L4b being arranged in order from object side are integrally installed on retainer HLD2, and can be relative to
Lens barrel 51 moves along optical axis direction.
5th lens group L5 (is moved by being held in the concavees lens L5a of lens barrel 51, being held in retainer 101 successively from object side
Dynamic frame) convex lens L5b and be held in the concavees lens L5c of fixed frame 100 and form.
Illustrate the jitter correction device 52 of present embodiment.Fig. 5 is the stereogram of jitter correction device 52, and Fig. 6 is to wrap
The structure in face of Fig. 5 for including line VI -- VI carries out cutting and observes the figure obtained by Fig. 5 structure in the direction of the arrow, and Fig. 7 is to wrap
The structure in face of Fig. 6 for including VII-VII lines carries out cutting and observes the figure obtained by Fig. 6 structure in the direction of the arrow, and Fig. 8 is to protect
Hold the stereogram of frame 101.Fig. 9 is the stereogram of fixed frame 100.Figure 10 is the solid for the magnet MG1 that self-sustaining frame 101 is pulled down
Figure, is indicated to its partial schematic.
In Fig. 6, Fig. 8, the retainer 101 being contained in jitter correction device 52 is in along the optical axis with convex lens L5b
The elongated tabular of orthogonal direction extension, at one end side maintain convex lens L5b, maintain tabular in another side stacking
Yoke YK1, YK2.On retainer 101, it is adjacent to the magnet for being provided with direction of advance driving with the yoke YK1 of object side
MG1.In magnet MG1 top, be provided with fixed frame 100 direction of advance driving from externally fed coil CL1 and
Sensor (Hall element) S1 of direction of advance position detection.1st drive is formed by magnet MG1, yoke YK1, YK2, coil CL1
Dynamic portion.
Illustrate magnet MG1.It is up object side, in Figure 10 that lower section is image side, magnet MG1 is magnetized with 3 in one side
Magnetic pole.Specifically, magnet MG1 is provided with 3 magnetic pole pieces along direction (r directions) arrangement orthogonal with the axle AX of rotary shaft 53
MG1a, MG1b, MG1c (from image side, observation is configured to N poles, S poles, N poles, but can also be configured to S poles, N poles, S poles).In magnetic pole
Formed with the unmagnetized portion MG1d without polarity between portion MG1a and MG1b, formed with not between magnetic pole piece MG1b and MG1c
Unmagnetized portion MG1e with polarity, tangential direction extension of each of which along the concentric circles centered on rotation axis AX.
Here, set the magnetic pole piece MG1a width along r directions as A, the magnetic pole piece MG1b width along r directions is B, magnetic pole piece
When the MG1c width along r directions is C, meet following formula.
0.75<B/(A+C)<1.75 (1)
It is even more preferred that meet following formula.
0.8≤B/(A+C)≤1.65 (1’)
As shown in fig. 6, coil CL1 in magnet MG1 object side across magnetic pole piece MG1a, MG1b and to make unmagnetized portion
MG1d be located therein centre mode configure, as the 1st position detection component sensor S1 magnet MG1 object side with across
Magnetic pole piece MG1b, MG1c and make unmagnetized portion MG1e be located therein centre mode configure.
Although can't see in Fig. 6, it is adjacent on retainer 101 with the yoke YK2 of photographing element side and rotation is installed
The magnet MG2 (reference picture 7) of direction driving.In magnet MG2 lower section, it is provided with fixed frame 100 from externally fed
The coil CL2 of direction of rotation driving and sensor (Hall element) S2 of direction of rotation position detection.By magnet MG2, magnetic
Yoke YK1, YK2 and coil CL2 form the 2nd drive division.
In Fig. 7 section, coil CL2 configures in magnet MG2 image side in a manner of across magnet MG2 the two poles of the earth.Magnetic
Body MG1 and magnet MG2 is configured in a manner of overlapping in the direction of the optical axis.As shown in fig. 6, the biography as the 2nd position detection component
Sensor S2 is configured in position adjacent with coil CL2 and overlapping with magnet MG1 and magnet MG2 in magnet MG2 image side.
In figure 6, retainer 101 both ends of the surface formed with along Fig. 6 left and right directions extension slit 101a, 101b,
101c, 101d (reference picture 8).Engaging has self-retaining frame 100 vertically in the slit 101d for forming advance guide mechanism
The rotary shaft 53 of (direction that be substantially parallel with optical axis) extension.Thus, retainer 101 can rotate guide mechanism relative to forming
Rotary shaft 53 moved on elongated hole 101d bearing of trend, and can be around the rotation axis AX (reference picture 5) of rotary shaft 53
Rotation.
As shown in figure 9, in the relative side wall of fixed frame 100 formed with hole 100a, 100b (be blocked and can't see, but
It is relative with 100a), 100c, 100d, pin 54,55,56 (Fig. 5) abreast runs through this some holes.Pin 54 prolongs through the ground of fixed frame 100
Stretch, be sticked in the slit 101a of retainer 101.The two side that pin 55 and pin 56 distinguish self-retaining frame 100 inwardly just extends, pin
55 top is sticked in the slit 101b of retainer 101, and the top of pin 56 is sticked in the slit 101c of retainer 101.Using this
The structure of sample, retainer 101 are remained using pin 54,55,56 and can slided in face orthogonal with the optical axis.
Illustrate the action of jitter correction device 52.Generation is being detected using acceleration transducer located at camera device etc.
During image shake, by making retainer 101 and convex lens L5b together move to carry out shake amendment.Specifically, will edge
When direction of rotation drives convex lens L5b, by being powered to the coil CL2 of direction of rotation driving to assign magnet MG2 magnetic force,
In Fig. 5, the rotation axis AX of convex lens L5b and the retainer 101 that is guided by pin 54,55,56 together around rotary shaft 53 (is used as the
The θ directions in 2 directions) rotate, its position is detected magnet MG2 magnetic field by using Hall element S2 and tried to achieve, and carries out feedback control.
On the other hand, when to drive convex lens L5b along direction of advance, the coil CL1 for direction driving of marching forward is passed through
Be powered and assign magnet MG1 magnetic force, in Figure 5, convex lens L5b and by pin 54,55,56 guide retainer 101 to rotation
The direction (the r directions as the 1st direction) that the rotation axis AX of axle 53 is orthogonal is mobile, and its position is detected by using Hall element S1
Magnet MG1 magnetic field and try to achieve, carry out feedback control.Thus, convex lens L5b can be displaced to and optical axis relative to photographing element
Optional position on orthogonal direction.Here, so divide the work in the magnetic pole piece of magnet MG1 one side：Examined with Hall element S1
Survey from magnetic field caused by magnetic pole piece MG1b, MG1c of a pair of N poles and S poles, for detecting position of the movable frame relative to fixed frame,
Another pair N pole different from above-mentioned a pair and magnetic pole piece MG1a, MG1b of S poles magnetic field are used to drive movable frame.
Here, in order to realize the control of the high-precision position of retainer 101, it is necessary to suppress the influence in magnet MG1 magnetic field
Feed through to sensor S2.Therefore, in the present embodiment, by adjusting magnet on the magnet MG1 face relative with yoke YK1
Size, magnetic force etc. so that total magnetic flux sum caused by the magnetic pole piece from all N poles is more than the magnetic pole from all S poles
0.8 times of total magnetic flux sum caused by portion and less than 1.2 of total magnetic flux sum caused by the magnetic pole piece from all S poles
Times.It is further preferred that in magnet MG1 so that total magnetic flux sum caused by the magnetic pole piece from all N poles is more than from all
S poles magnetic pole piece caused by 0.85 times of total magnetic flux sum and less than total magnetic flux caused by the magnetic pole piece from all S poles
Measure sum 1.15 times.I.e. so that total magnetic flux sum caused by the magnetic pole piece from all N poles and the magnetic from all S poles
Total magnetic flux sum is roughly equal caused by the portion of pole.Thereby, it is possible to reduce the magnetic flux of the External leakage to magnet MG1, therefore,
The influence that magnet MG1 magnetic field can be suppressed feeds through to sensor S2, can prevent position detection accuracy, position control accuracy from becoming
Difference.
Hereinafter, the result for the simulation that the present inventor is carried out is illustrated.Figure 11~Figure 13 be respectively change specification magnet MG1 and
Yoke YK1 r sectional views, it is the figure of magnetic flux caused by expression in the lump.Here, set magnet MG1 magnetic pole piece MG1a r side
It is A to the width on (left and right directions), the width on magnetic pole piece MG1b r directions (left and right directions) is B, magnetic pole piece MG1c r
Width on direction (left and right directions) is C.
In the magnet MG1 of the comparative example 1 of the specification shown in Figure 11, A=B=C, therefore, (A+C)/B=2, beyond
(1) upper limit of formula.As shown in figure 11, the magnetic flux leaked to magnetic pole piece MG1a, the MG1c at both ends outside increases, and around magnetic
Yoke YK1 lower section, sensor S2 may be had undesirable effect and cause position detection accuracy, position control accuracy is deteriorated.
In addition, in the magnet MG1 of the comparative example 2 of the specification shown in Figure 12, (A+C)/B=0.5, beyond (1) formula
Lower limit.As shown in figure 12, it is more from magnetic flux quantitative change caused by the magnetic pole piece MG1b in center upper surface (N poles), not completely by both ends
Magnetic pole piece MG1a, MG1c upper surface (S poles) absorb, but around yoke YK1 lower section, sensor S2 may be caused not
It is good influence and cause position detection accuracy, position control accuracy be deteriorated.
On the other hand, in the magnet MG1 of the embodiment of the specification shown in Figure 13, (A+C)/B=1.0, (1) formula is met.
Thus, total magnetic flux sum caused by the magnetic pole piece from N poles and total magnetic flux sum caused by the magnetic pole piece from all S poles are big
Cause equal.Therefore, as shown in figure 13, from magnetic flux and the magnetic to both ends caused by the magnetic pole piece MG1b in center upper surface (N poles)
The magnetic flux that pole portion MG1a, MG1c upper surface (S poles) are gone reaches balance, and the magnetic flux of yoke YK1 lower section is greatly reduced, because
This, can be avoided having undesirable effect sensor S2, and position detection accuracy, position control accuracy can be prevented to be deteriorated.
It should be noted that assume in the present invention magnet MG1 be in length and breadth, the constant rectangular plate-like of thickness, and
Define the value of the width of magnetic pole piece, still, magnet MG1 it is variform in the case of, the size of magnetic pole piece is sometimes
The scope of (1) formula or (1 ') formula may also be exceeded.However, it should be understood that for：In such magnet, from institute on its one side
Total magnetic flux sum caused by total magnetic flux sum caused by the magnetic pole piece of some N poles and the magnetic pole piece from all S poles is substantially
Consistent situation is also within the scope of the invention.
Hereinafter, the preferable scheme for illustrating above-mentioned jitter correction device is concluded.
Preferably, above-mentioned 2nd drive division includes the 2nd line being located on the side in above-mentioned fixed frame and above-mentioned movable frame
Circle and the 2nd magnet on the opposing party in above-mentioned fixed frame and above-mentioned movable frame, by applying electricity to above-mentioned 2nd coil
Pressure, can be such that above-mentioned movable frame is relatively moved relative to above-mentioned fixed frame on above-mentioned 2nd direction, above-mentioned 2nd position detection part
Part detects above-mentioned movable frame relative to above-mentioned fixed frame in above-mentioned 2nd side by detecting from magnetic field caused by above-mentioned 2nd magnet
Upward relative position.Thereby, it is possible to make above-mentioned movable frame relative to above-mentioned fixed frame in above-mentioned 1st direction and above-mentioned 2nd side
Move up, and above-mentioned movable frame can be detected respectively relative to above-mentioned fixed frame on above-mentioned 1st direction and above-mentioned 2nd direction
Relative position.
Moreover it is preferred that the jitter correction device of the present invention includes rotating guide mechanism and advance guide mechanism, this turn
Dynamic guide mechanism enables above-mentioned movable frame rotationally to guide above-mentioned movable frame around with the almost parallel axis of above-mentioned optical axis, should
Advance guide mechanism enables direction of advance of the above-mentioned movable frame along the above-mentioned Axis Cross with above-mentioned rotation guide mechanism to move
Above-mentioned movable frame is guided dynamicly, and above-mentioned 1st direction is above-mentioned direction of advance, and above-mentioned 2nd direction is to be rotated around above-mentioned axis
Direction.Thereby, it is possible to make above-mentioned movable frame be moved up relative to above-mentioned fixed frame in above-mentioned 1st direction with above-mentioned 2nd side, and
Relative position of the above-mentioned movable frame relative to above-mentioned fixed frame on above-mentioned 1st direction and above-mentioned 2nd direction can be detected.
Moreover it is preferred that above-mentioned 1st magnet and above-mentioned 2nd magnet are being sandwiched between yoke with them, and from optical axis side
Configured at least a portion overlapping mode during observation.By being configured so that above-mentioned 1st magnet and above-mentioned 2nd magnet, Neng Gouti
For compact jitter correction device.In addition, bad shadow is caused to above-mentioned 2nd position detection component by the magnetic field of above-mentioned 1st magnet
Loud possibility is high, still, in accordance with the invention it is possible to reduce the influence to the 2nd position detection component, so as to well should
With.
Moreover it is preferred that above-mentioned 1st magnet, above-mentioned 2nd magnet and yoke are fixed on above-mentioned movable frame, above-mentioned 1st line
Circle and above-mentioned 2nd coil are fixed on fixed frame.Compared with coil to be equipped on to the situation of above-mentioned movable frame, distribution is easily carried out
Processing etc., can further ensure that the free degree of design, in addition, can also realize the dual-purpose of yoke, therefore is preferable.
Moreover it is preferred that in the magnetic pole piece of the one side of above-mentioned 1st magnet, detected with above-mentioned 1st position detection component
, will be with for detecting position of the above-mentioned movable frame relative to above-mentioned fixed frame from magnetic field caused by the magnetic pole of a pair of N poles and S poles
The magnetic field of the magnetic pole of above-mentioned a pair different another pair N poles and S poles is used to drive above-mentioned movable frame.By using said structure,
The 1st position detection component and the coil for driving movable frame can be configured on the moving direction of above-mentioned 1st drive division, because
This, can be advantageously applied to the situation of the thinning on 1 direction of principal axis.In addition, the magnetic pole piece in the one side of above-mentioned 1st magnet is 3
During pole, by the way that the central magnetic pole in the magnetic pole of 3 poles is used for into position detection and driving, hand shaking correcting device can be realized
Miniaturization.
The present invention is not limited to the embodiment of this specification record, embodiment, also including other embodiment, deformation
Example, this is to those skilled in the art obvious according to the embodiment of this specification record, technological thought.
For example, it is also possible to solid-state imager is equipped on retainer 101 and it is moved in both direction orthogonal with the optical axis.
Or the magnetic pole piece of more than 3 poles can also be set in magnet MG2 one side.Or can also use driving coil can moving-wire
The jitter correction device of ring, rather than the jitter correction device of the movable magnet type of driving magnet.
10：Camera device；12：Housing；12a：Opening；14：Cover component；32：Display；34：Shutter release button；36：Power supply
Switch；38：Zoom operation switchs；40：Operation switch；50：Lens unit；51：Lens barrel；52：Jitter correction device；53：Rotation
Axle；54、55、56：Pin；100：Fixed frame；100a：Hole；100b：Hole；100c：Hole；100d：Hole；101：Retainer；101a：It is narrow
Groove；101b：Slit；101c：Slit；101d：Slit；AX：Rotation axis；CL1：Coil；CL2：Coil；HLD1：Retainer；
HLD2：Retainer；L1~L5：Lens group；MG1：Magnet；MG2：Magnet；PZ：Prism；S1：Sensor (Hall element)；S2：Pass
Sensor (Hall element)；YK1：Yoke；YK2：Yoke.
Claims (13)
1. a kind of jitter correction device, it passes through edge the 1st direction different from each other in the face being substantially orthogonal with optical axis and the 2nd side
The amendment of shake when maintaining the movable frame of lens or solid-state imager to driving to be imaged,
The jitter correction device includes：Fixed frame；Movable frame, it can be relatively moved relative to above-mentioned fixed frame；1st driving
Portion, it makes above-mentioned movable frame be moved up relative to above-mentioned fixed frame in above-mentioned 1st side；2nd drive division, it makes above-mentioned movable frame
Moved up relative to above-mentioned fixed frame in above-mentioned 2nd side；1st position detection component, it detects above-mentioned movable frame relative to upper
State relative position of the fixed frame on above-mentioned 1st direction；2nd position detection component, it detects above-mentioned movable frame relative to above-mentioned
Relative position of the fixed frame on above-mentioned 2nd direction；
It can determine above-mentioned movable frame on above-mentioned 1st direction based on the position detected by above-mentioned 1st position detection component
Amount of movement；
Above-mentioned 1st drive division includes the 1st coil being located on the side in above-mentioned fixed frame and above-mentioned movable frame and located at above-mentioned
The opposing party in fixed frame and above-mentioned movable frame is upper and at least has the 1st magnet of the magnetic pole piece of 3 poles in one side, by above-mentioned
1st coil applies voltage, and above-mentioned movable frame can be made to be relatively moved relative to above-mentioned fixed frame on above-mentioned 1st direction；
Above-mentioned 1st position detection component by detection from magnetic field caused by above-mentioned 1st magnet come detect above-mentioned movable frame relative to
Relative position of the above-mentioned fixed frame on above-mentioned 1st direction, it is characterised in that
Above-mentioned 1st magnet includes being configured at the center pole portion in center and is configured at the center pole portion along above-mentioned 1st direction
Both sides and the side magnetic pole piece different from above-mentioned center pole portion polarity, above-mentioned center pole portion is on above-mentioned 1st direction
Width is more than width sum of the above-mentioned side magnetic pole piece on above-mentioned 1st direction,
In the above-mentioned one side of above-mentioned 1st magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles with from all S
Total magnetic flux sum is substantially uniform caused by the magnetic pole piece of pole,
In the magnetic pole piece of the one side of above-mentioned 1st magnet, the magnetic pole with the detection of above-mentioned 1st position detection component from a pair of N poles and S poles
Caused magnetic field, for detecting position of the above-mentioned movable frame relative to above-mentioned fixed frame, another pair N pole different from above-mentioned a pair
It is used to drive above-mentioned movable frame with the magnetic field of the magnetic pole of S poles.
2. jitter correction device according to claim 1, it is characterised in that
In the one side of above-mentioned 1st magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles is more than from all S poles
Magnetic pole piece caused by 0.8 times of total magnetic flux sum and less than total magnetic flux sum caused by the magnetic pole piece from all S poles
1.2 times.
3. jitter correction device according to claim 2, it is characterised in that
In the one side of above-mentioned 1st magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles is more than or equal to from all
0.85 times of total magnetic flux sum caused by the magnetic pole piece of S poles and less than or equal to total magnetic caused by the magnetic pole piece from all S poles
1.15 times of flux sum.
4. jitter correction device according to claim 1, it is characterised in that
Width of the above-mentioned center pole portion on above-mentioned 1st direction is less than width of the above-mentioned side magnetic pole piece on above-mentioned 1st direction
Spend sum 1.75 times.
5. jitter correction device according to claim 4, it is characterised in that
Width of the above-mentioned center pole portion on above-mentioned 1st direction is less than or equal to above-mentioned side magnetic pole piece on above-mentioned 1st direction
1.65 times of width sum.
6. the jitter correction device according to claim 1 or 4, it is characterised in that
Above-mentioned 2nd drive division includes the 2nd coil being located on the side in above-mentioned fixed frame and above-mentioned movable frame and located at above-mentioned
The 2nd magnet on the opposing party in fixed frame and above-mentioned movable frame, by applying voltage to above-mentioned 2nd coil, it can make above-mentioned
Movable frame relatively moves relative to above-mentioned fixed frame on above-mentioned 2nd direction；
Above-mentioned 2nd position detection component by detection from magnetic field caused by above-mentioned 2nd magnet come detect above-mentioned movable frame relative to
Relative position of the above-mentioned fixed frame on above-mentioned 2nd direction.
7. the jitter correction device according to claim 1 or 4, it is characterised in that
The jitter correction device, which includes rotation guide mechanism and advance guide mechanism, the rotation guide mechanism, enables above-mentioned movable frame
Enough rotationally to guide above-mentioned movable frame around with the almost parallel axis of above-mentioned optical axis, the advance guide mechanism makes above-mentioned movable frame
It can movably guide above-mentioned movable frame along the direction of advance of the above-mentioned Axis Cross with above-mentioned rotation guide mechanism, above-mentioned
1 direction is above-mentioned direction of advance, and above-mentioned 2nd direction is around the direction that above-mentioned axis rotates.
8. jitter correction device according to claim 6, it is characterised in that
Above-mentioned 1st magnet and above-mentioned 2nd magnet are with least a portion when between which clips yoke and is observed from optical axis direction
Overlapping mode configures.
9. jitter correction device according to claim 6, it is characterised in that
Above-mentioned 1st magnet, above-mentioned 2nd magnet and yoke are fixed on above-mentioned movable frame, and above-mentioned 1st coil and above-mentioned 2nd coil are consolidated
Due to fixed frame.
A kind of 10. lens unit, it is characterised in that
The lens unit includes jitter correction device according to any one of claims 1 to 9, has and led to solid-state imager
Enter the optical system of multiple lens of object light and keep the lens barrel of above-mentioned multiple lens.
11. lens unit according to claim 10, it is characterised in that
Above-mentioned optical system is the optical system for including making the flexure type of the reflecting member of light path bending.
A kind of 12. camera device, it is characterised in that
Above-mentioned camera device includes the lens unit and solid-state imager described in claim 10 or 11.
13. a kind of driver, it is used for jitter correction device, and the jitter correction device passes through along in the face being substantially orthogonal with optical axis
When interior 1st direction different from each other and the 2nd direction driving maintains the movable frame of lens or solid-state imager to be imaged
Shake amendment,
Above-mentioned jitter correction device includes：Fixed frame；Movable frame, it can be relatively moved relative to above-mentioned fixed frame；1st position
Detection part, it detects relative position of the above-mentioned movable frame relative to above-mentioned fixed frame on above-mentioned 1st direction；Examine 2nd position
Part is surveyed, it detects relative position of the above-mentioned movable frame relative to above-mentioned fixed frame on above-mentioned 2nd direction；
It can determine above-mentioned movable frame on above-mentioned 1st direction based on the position detected by above-mentioned 1st position detection component
Amount of movement；
Above-mentioned driver includes the 1st drive division and the 2nd drive division, and the 1st drive division makes above-mentioned movable frame relative to above-mentioned fixation
Frame moves up in above-mentioned 1st side, and the 2nd drive division makes above-mentioned movable frame relative to above-mentioned fixed frame on above-mentioned 2nd direction
It is mobile；
Above-mentioned 1st drive division includes the 1st coil being located on the side in above-mentioned fixed frame and above-mentioned movable frame and located at above-mentioned
The opposing party in fixed frame and above-mentioned movable frame is upper and at least has the 1st magnet of the magnetic pole piece of 3 poles in one side, by above-mentioned
1st coil applies voltage, and above-mentioned movable frame can be made to be relatively moved relative to above-mentioned fixed frame on above-mentioned 1st direction；
Above-mentioned 1st position detection component by detection from magnetic field caused by above-mentioned 1st magnet come detect above-mentioned movable frame relative to
Relative position of the above-mentioned fixed frame on above-mentioned 1st direction, it is characterised in that
Above-mentioned 1st magnet includes being configured at the center pole portion in center and is configured at the center pole portion along above-mentioned 1st direction
Both sides and the side magnetic pole piece different from above-mentioned center pole portion polarity, above-mentioned center pole portion is on above-mentioned 1st direction
Width is more than width sum of the above-mentioned side magnetic pole piece on above-mentioned 1st direction,
In the above-mentioned one side of above-mentioned 1st magnet, total magnetic flux sum caused by the magnetic pole piece from all N poles with from all S
Total magnetic flux sum is substantially uniform caused by the magnetic pole piece of pole,
In the magnetic pole piece of the one side of above-mentioned 1st magnet, the magnetic pole with the detection of above-mentioned 1st position detection component from a pair of N poles and S poles
Caused magnetic field, for detecting position of the above-mentioned movable frame relative to above-mentioned fixed frame, another pair N pole different from above-mentioned a pair
It is used to drive above-mentioned movable frame with the magnetic field of the magnetic pole of S poles.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2014-032449 | 2014-02-24 | ||
| JP2014032449A JP6485727B2 (en) | 2014-02-24 | 2014-02-24 | Blur correction device, lens unit, imaging device, and actuator |
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| Publication Number | Publication Date |
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| CN104865775A CN104865775A (en) | 2015-08-26 |
| CN104865775B true CN104865775B (en) | 2018-01-05 |
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| JP6655401B2 (en) * | 2016-01-21 | 2020-02-26 | オリンパス株式会社 | Imaging device and image blur correction method |
| JP6997370B2 (en) * | 2017-05-25 | 2022-01-17 | ミツミ電機株式会社 | Camera actuators, camera modules, and camera-mounted devices |
| JP6728122B2 (en) * | 2017-11-20 | 2020-07-22 | 株式会社タムロン | Actuator, lens unit including the same, camera |
| KR102163416B1 (en) * | 2018-08-13 | 2020-10-08 | 삼성전기주식회사 | Aperture module and camera module including the same |
| JP7186047B2 (en) * | 2018-09-27 | 2022-12-08 | 日本電産サンキョー株式会社 | Unit with anti-shake function |
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| Publication number | Publication date |
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| CN104865775A (en) | 2015-08-26 |
| JP2015158549A (en) | 2015-09-03 |
| JP6485727B2 (en) | 2019-03-20 |
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