CN107390345A - Lens driver - Google Patents
Lens driver Download PDFInfo
- Publication number
- CN107390345A CN107390345A CN201710343557.9A CN201710343557A CN107390345A CN 107390345 A CN107390345 A CN 107390345A CN 201710343557 A CN201710343557 A CN 201710343557A CN 107390345 A CN107390345 A CN 107390345A
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- China
- Prior art keywords
- mentioned
- magnet
- lens
- yoke
- lens holder
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
Even if a kind of possess the composition detected by magnetic to the position of the optical axis direction of lens holder, the lens driver of the thrust of optical axis direction can also ensure that.Possess：Lens holder (2)；Supporting member (3), is supported to lens holder；Drive mechanism (M5), moves lens holder；And position detection unit (K7), the position of lens holder is detected, position detection unit is configured to have：Magnet (57) is used in detection, is fixed on lens holder；And Magnetic testi part, magnetic field is detected, drive mechanism is configured to have：Coil (35), is wound in around lens holder；Magnet (55) is used in multiple drivings, is disposed in the outside of coil；Yoke (75), integratedly located at multiple driving magnet, yoke has the periphery wall portion (75A) in the outside positioned at coil and driving magnet, and the periphery wall portion of position corresponding with detection magnet forms breach.
Description
Technical field
The present invention relates to the lens driver for being for example equipped on the portable equipment with video camera.
Background technology
In recent years, the situation for image mechanism being carried in the portable equipment using portable phone as representative becomes very universal.Then, make
For be equipped on the lens driver of the main parts size of the image mechanism of the small portable device be used in for shoot it is quiet
The only auto-focusing of image or dynamic image, in addition to the requirement for wishing to minimize, lenticular body is accurately driven (equipped with saturating
The lens barrel of mirror) requirement also increase.As in order to meet this two requirement lens drivers, it is known to be used to drive
The magnetic circuit of the lens mount (lens holder) kept to lenticular body is around lens mount.
In addition, recently, in the shooting realized by auto-focusing, it is generally desirable to rapid focus, drive and fill in lens
In putting, it is desirable to the high speed of auto-focusing, the faster driving i.e. to optical axis direction.In response to the requirement, once attempt to pass through
Grasp and control lens mount (lens holder) in the detail location of optical axis direction to shorten lens mount (lens maintaining part
Part) positioning time.
As said lens drive device, in patent document 1 (past case), the electricity as shown in Figure 12 and Figure 13 is proposed
Magnetic driving module 901.Figure 12 is the exploded perspective view for the electromagnetic drive module 901 for illustrating past case.Figure 13 is the electricity of past case
The top view of the inscape of a part for Magnetic driving module 901.
Electromagnetic drive module 901 shown in Figure 12 is configured to possess：Upper shell 910 and lower house 930, are engaged with each other simultaneously
Form receiving space；Framework 914, it is fixed on upper shell 910 or lower house 930；Two (permanent magnetics of the first magnetic element 916
Iron), it is arranged at framework 914；Matrix 918, lens subassembly (not shown) is supported；Coil block 922, there is ring-type structure
Make and be arranged at the outside of matrix 918；Upper spring seat 912 and lower spring cup 928, along vertical direction (the Z side shown in Figure 12
To i.e. optical axis direction) movably support substrate 918；Reference element 920 (permanent magnet), is configured at (reference in matrix 918
Figure 13)；Sensor element 926 (hall effect sensor), the change to the magnetic field of reference element 920 sense；And electricity
Road plate 924, it is equipped with sensor element 926.
Then, if assembling electromagnetic drive module 901, as shown in figure 13, coil block is arranged in the periphery of matrix 918
922, the first magnetic element 916 is disposed in the outside of coil block 922 respectively in a manner of opposed in one direction.In addition,
Configuration baseline element 920 in the matrix 918 of the other direction orthogonal with a direction, and across coil block 922, with base
The opposed position of quasi-element 920 arranges sensor element 926.
The electromagnetic drive module 901 so formed passes through two the first magnetic elements 916 (permanent magnet) and coil block
922 form magnetic circuit, and by the caused electromagnetic force that is powered to coil block 922, matrix 918 (is supported in matrix
918 lens subassembly) moved along optical axis direction.Now, change of the sensor element 926 to the magnetic field of reference element 920 is passed through
Change is sensed, and thus, electromagnetic drive module 901 can interpolate that the position of reference element 920, is configured with thus it is possible to detect
The position of the matrix 918 (lens holder) of reference element 920.Thus, electromagnetic drive module 901 can make lens subassembly fast
Destination locations are moved to fastly.
Prior art literature
Patent document
The Japanese Unexamined Patent Publication 2015-107054 publications of patent document 1
Invent problem to be solved
But in past case, due to without for making the magnetic flux from the first magnetic element 916 efficiently act on line
The mechanisms such as the yoke of coil assembly 922, so in the presence of the problem that can not improve the thrust for making matrix 918 be moved to optical axis direction.Separately
On the one hand, in order to improve propulsive force in a manner of not increasing the number or non-increased in size of the first magnetic element 916, consider logical
Magnetic metal is crossed to form upper shell 910, makes it have the function of yoke.But in the case of such form, from benchmark
Magnetic field caused by element 920 is influenceed by from magnetic field caused by two the first magnetic elements 916 and upper shell 910, probably
Sensor element 926 can not accurately carry out the position detection of matrix 918.
The content of the invention
The present invention is used for solving above-mentioned problem, even if possessing its object is to provide one kind by magnetic to lens maintaining part
The composition that the position of the optical axis direction of part is detected, it can also ensure that the lens driver of the thrust of optical axis direction.
For solving the method for problem
In order to solve the problem, lens driver of the invention possesses：The lens holder of tubular, it can keep
Mirror body；Supporting member, the lens holder is supported in a manner of it can move in the direction of the optical axis；Drive mechanism, make above-mentioned
Lens holder moves along above-mentioned optical axis direction；And position detection unit, to the above-mentioned light of said lens holding member
Detected position on direction of principal axis, it is characterised in that above-mentioned position detection unit is configured to have：Detection magnet, it is fixed
In said lens holding member；And Magnetic testi part, to the detection, the magnetic field caused by magnet is detected, above-mentioned drive
Motivation structure is configured to have：Coil, it is arranged to around said lens holding member；Multiple driving magnet, arrange
In the outside of the coil；And yoke, integratedly located at the plurality of driving magnet, the yoke have positioned at above-mentioned coil with
And the periphery wall portion in the outside of above-mentioned driving magnet, and the above-mentioned periphery wall portion of position corresponding with above-mentioned detection magnet
Formed jagged.
Accordingly, in lens driver of the invention, integrally provided with yoke on driving magnet, therefore, it is possible to make
It is self-driven efficiently to act on coil with the magnetic flux of magnet, and the thrust of optical axis direction can be improved.Further, since with inspection
Survey periphery wall portion of the yoke of position corresponding to magnet formed it is jagged, so from detection the magnetic field caused by magnet be difficult to by
To the influence from magnetic field caused by yoke.It is accordingly possible to ensure position detection unit (detection magnet and Magnetic testi part)
Accuracy of detection.Even if the position of the optical axis direction of lens holder is examined by magnetic therefore, it is possible to provide to possess
The composition of survey, it can also ensure that the lens driver of the thrust of optical axis direction.
In addition, the lens driver of the present invention is characterised by, above-mentioned yoke is formed by having magnetic metallic plate, on
Periphery wall portion is stated to be continuously formed in addition to corresponding part except with above-mentioned detection with magnet.
Accordingly, the periphery wall portion of yoke and non-annularity, be partially separated open corresponding with detection magnet can also be used
Shape (substantially C fonts).Employ it is so shaped in the case of, make yoke when, without to metallic plate carry out drawing process,
The shape of yoke can be formed by bending process.Thus, the processing of yoke becomes easy, can inexpensively make yoke.
In addition, the lens driver of the present invention is characterised by, formed during the periphery wall portion top view of above-mentioned yoke
For the rectangular shape with four corners, above-mentioned yoke possesses：Inner wall part, across above-mentioned driving magnet and above-mentioned line
Circle is opposed with above-mentioned corner；And upper plate portion, it is connected with the inner wall part and is connected with the above-mentioned corner of above-mentioned periphery wall portion.
Accordingly, the inner wall part turns into inner yoke, can make come it is self-driven efficiently act on coil with the magnetic flux of magnet, and
The thrust of optical axis direction can further be improved.
In addition, the lens driver of the present invention is characterised by, the part in above-mentioned upper plate portion and above-mentioned corner is connected
Width dimensions are formed as smaller than the width dimensions of above-mentioned inner wall part.
Accordingly, the width than inner wall part is formed as due to the width dimensions of connection upper plate portion and the part (connecting portion) in corner
Size is small, therefore, even if being provided with inner wall part, also can carry out bending process to a metallic plate to make yoke.Moreover, energy
Enough increase the width dimensions of inner wall part, can also increase the space between inner wall part and corner.Thereby, it is possible to easily make magnetic
Yoke, and can further improve thrust.
In addition, the lens driver of the present invention is characterised by possessing the case being made up of case member and base component
Body, the case member cover and accommodate above-mentioned yoke, the base component be disposed in the lower side of said lens holding member and with
Case member integration.
Accordingly, the notch part of yoke, which grades, can't expose to outside, can prevent foreign matter intrusion lens holder side.
It is additionally, since and is covered entirely through casing, therefore, picking and placeing for lens driver becomes easy.
In addition, the lens driver of the present invention is characterised by, above-mentioned detection is fixed on said lens with magnet and kept
The bottom of part, and the circuit board for being equipped with above-mentioned Magnetic testi part is located at the lower side of above-mentioned detection magnet.
Accordingly, with detection to be arranged to the side of lens holder with magnet and Magnetic testi part and circuit parts
Situation is compared, and can reduce the size (projected area) of plan view shape.
In addition, the lens driver of the present invention is characterised by that above-mentioned Magnetic testi part has change of the resistance because of magnetic field
The magneto-resistance effect element changed and changed, above-mentioned detection is geomagnetic into different magnetic poles with magnet in above-mentioned optical axis direction, from above-mentioned
When optical axis direction is observed, the center and the center of above-mentioned magneto-resistance effect element of above-mentioned detection magnet are staggered.
Accordingly, the intensity of variation in the magnetic field on the orthogonal direction orthogonal with optical axis direction suffered by magneto-resistance effect element
Big position, is equipped with magneto-resistance effect element.Thus, become big with the change in the magnetic field of the mobile phase companion of detection magnet, can
Improve the precision of detection.
Invention effect
It is self-driven therefore, it is possible to make to come in driving magnet integrally provided with yoke in the lens driver of the present invention
Coil is efficiently acted on the magnetic flux of magnet, and the thrust of optical axis direction can be improved.Further, since with detection magnet pair
The periphery wall portion of the yoke for the position answered forms breach, therefore, is difficult to be produced by by yoke as detecting the magnetic field caused by magnet
The influence in raw magnetic field.Thus it is possible to ensure the accuracy of detection of position detection unit (detection magnet and Magnetic testi part).
Even if therefore, it is possible to provide it is a kind of possess by magnetic to detect the composition of the position of the optical axis direction of lens holder,
It is able to ensure that the lens driver of the thrust of optical axis direction.
Brief description of the drawings
The exploded perspective view of the lens driver of the first embodiments of Fig. 1 to illustrate the invention.
Fig. 2 is the stereogram illustrated to the lens driver of the first embodiment of the present invention.
Fig. 3 is the figure illustrated to the lens driver of the first embodiment of the present invention, and Fig. 3 (a) is from Z1 sides
Fig. 2 top view is observed, Fig. 3 (b) is the front view of Fig. 2 from Y2 sides.
The figure that Fig. 4 illustrates to the lens driver of the first embodiment of the present invention, Fig. 4 (a) are to eliminate Fig. 2
The stereogram of shown case member, Fig. 4 (b) are the front view of Fig. 4 (a) from Y2 sides.
Fig. 5 is the figure illustrated to the lens driver of the first embodiment of the present invention, and Fig. 5 (a) is from Z2 sides
Fig. 2 upward view is observed, Fig. 5 (b) is the upward view for eliminating the base component shown in Fig. 5 (a).
Fig. 6 is the figure illustrated to the lens holder of the lens driver of the first embodiment of the present invention,
Fig. 6 (a) is the stereogram of lens holder, and Fig. 6 (b) is the solid that coil is wound in the lens holder shown in Fig. 6 (a)
Figure.
The figure that Fig. 7 illustrates for the supporting member of the lens driver of the first embodiment to the present invention, Fig. 7
(a) it is the top view of the upside leaf spring from Z1 sides shown in Fig. 1, Fig. 7 (b) is the downside leaf spring from Z1 sides shown in Fig. 1
Top view.
The figure that Fig. 8 illustrates for the drive mechanism of the lens driver of the first embodiment to the present invention, Fig. 8
(a) to eliminate the stereogram of frame-shaped part and upside leaf spring shown in Fig. 4 (a), Fig. 8 (b) is to eliminate shown in Fig. 5 (b)
Downside leaf spring and lens holder upward view.
The figure that Fig. 9 illustrates for the drive mechanism of the lens driver of the first embodiment to the present invention, Fig. 9
(a) it is the top view of the yoke from Z1 sides shown in Fig. 1, Fig. 9 (b) is that the lower section of the yoke from Z2 sides shown in Fig. 1 is stood
Body figure.
The figure that Figure 10 illustrates for the base component of the lens driver of the first embodiment to the present invention, Figure 10
(a) it is the top perspective view of the base component from Z1 sides shown in Fig. 1, Figure 10 (b) is to represent the base component in Figure 10 (a)
It is assembled with the stereogram of the state of downside leaf spring and position detection unit.
Figure 11 is the figure illustrated to the position detection unit of the lens driver of the first embodiment of the present invention,
Figure 11 (a) is the stereogram of position detection unit, and Figure 11 (b) is the position detection unit from the Z1 sides shown in Figure 11 (a)
Top view.
Figure 12 is the exploded perspective view illustrated to the electromagnetic drive module of past case.
Figure 13 is the top view of the inscape of a part for the electromagnetic drive module of past case.
In figure：
2 lens holders
3 supporting members
M5 drive mechanisms
35 coils
55 driving magnet
75 yokes
75A periphery wall portions
75C inner wall parts
75T upper plate portions
75k corners
6 casings
16 case members
36 base components
K7 position detection units
57 detection magnet
77 Magnetic testi parts
RE magneto-resistance effect elements
97 circuit boards
KD optical axis directions
101 lens drivers
Embodiment
Hereinafter, referring to the drawings, embodiments of the present invention are illustrated.
(first embodiment)
Fig. 1 is the exploded perspective view illustrated to the lens driver 101 of the first embodiment of the present invention.Fig. 2
The stereogram illustrated for the lens driver 101 of the first embodiment to the present invention.Fig. 3 (a) is from Z1 sides
The top view of Fig. 2 lens driver 101, Fig. 3 (b) are the front view of Fig. 2 lens driver 101 from Y2 sides.
Fig. 4 (a) is the stereogram for the case member 16 for eliminating the lens driver 101 shown in Fig. 2, and Fig. 4 (b) is from Y2 sides
Fig. 4 (a) front view.Fig. 5 (a) is the upward view of Fig. 2 from Z1 sides, and Fig. 5 (b) is to eliminate the base portion shown in Fig. 5 (a)
The upward view of part 36.
The lens driver 101 of the first embodiment of the present invention shows the length shown in Fig. 2, Fig. 3 and Fig. 5 (a)
The outward appearance of cube shape, as shown in figure 1, being configured to possess：The lens holder 2 of tubular, can keep lenticular body (not map
Show)；Supporting member 3, the supporting lens holding member 2 in a manner of lens holder 2 can move to optical axis direction KD；Driving
Mechanism M5, make lens holder 2 mobile along optical axis direction KD (Z-direction shown in Fig. 2)；Casing 6, accommodate lens maintaining part
Part 2 and drive mechanism M5 etc.；And position detection unit K7, the optical axis direction KD of lens holder 2 position is carried out
Detection.In addition, in the first embodiment of the present invention, lens driver 101, which has, is disposed in the upper of lens holder 2
The frame-shaped part 44 of side (the Z1 directions shown in Fig. 4 (a)).
In addition, in the first embodiment of the present invention, supporting member 3 is configured to possess to be fixed on as shown in Fig. 4 (a)
Under two of the shown bottom for being fixed on lens holder 2 of the upside leaf spring 3A on the top of mirror holding member 2 and such as Fig. 5 (b)
Side plate spring 3C and downside leaf spring 3E, and supporting lens holding member 2.
In addition, drive mechanism M5 is configured to the coil for rolling up the ring-type around lens holder 2 as shown in Figure 4
35th, discretely four drivings arranged opposite in the outside of coil 35 with magnet 55 and with four driving magnet 55 integratedly
The yoke 75 of setting, and lens holder 2 can be made to be moved along optical axis direction KD.
In addition, casing 6 forms rectangular shape as shown in Figure 2 and profile forms the case member 16 and and housing department of box-like
The base component 36 of the integration of part 16 is formed.
In addition, position detection unit K7 possesses：Magnet 57 (reference picture 4 (b)) is used in detection, is fixed on lens holder 2；
Magnetic testi part 77 (reference picture 11), detection magnetic field caused by magnet 57 is detected；And (the ginseng of circuit board 97
According to Figure 11), it is equipped with Magnetic testi part 77.
Then, not shown lenticular body is held in lens holder 2 by lens driver 101, and is assemblied in peace
On installation base plate (not shown) equipped with photographing element.Then, in order that being held in the lens of lenticular body in optical axis direction KD
(Z-direction shown in Fig. 2), which drives, simultaneously adjusts focal length, lens driver 101 by electric current from power supply flow through coil 35 and
Caused electromagnetic force, lens holder 2 is set to be moved relative to photographing element along optical axis direction KD.
Then, each constituent parts is described in detail.First, to the lens maintaining part of lens driver 101
Part 2 illustrates.Fig. 6 is the figure illustrated to lens holder 2, and Fig. 6 (a) is the stereogram of lens holder 2, is schemed
6 (b) is the stereogram that coil 35 is wound with lens holder 2 shown in Fig. 6 (a).In addition, also illustrate fixation in Fig. 6 (b)
In the position detection unit K7 of lens holder 2 detection magnet 57.
The lens holder 2 of lens driver 101 use as synthetic resin a kind of liquid crystal polymer (LCP,
Liquid Crystal Polymer) etc., as shown in fig. 6, mainly by forming tubular and there is the cylinder of round-shaped inner peripheral surface
Portion 12, cylinder portion 12 outer peripheral face X-direction and Y-direction be provided projectingly respectively everywhere be provided projectingly portion 22 and in cylinder
The flange part 32 that the lower end side (the Z2 sides shown in Fig. 6) in portion 12 protrudes from periphery towards radial outside is formed.Then, such as Fig. 4 institutes
Show, lens holder 2 is configured at the lower section (the Z2 directions shown in Fig. 4) of frame-shaped part 44 and top (Fig. 4 of base component 36
Shown Z1 directions).
In the cylinder portion 12 of lens holder 2, binding agent etc. can be used in the not shown lenticular body of inner circumferential surface attaching
Lenticular body is held in lens holder 2.In addition, cylinder portion 12 upper end side and be provided projectingly near portion 22 everywhere,
It is opposed on the diagonal formed with the notch part 12d in a concave shape that is recessed.Then, when assembling lens driver 101, such as
Shown in Fig. 4 (a), the upside leaf spring 3A (described later first of the notch part 12d (lens holder 2) and supporting member 3 everywhere
Part 13) fixed by binding agent.
As shown in Fig. 6 (a), the portion 22 that is provided projectingly of lens holder 2 has from upper end side (the Z1 sides shown in Fig. 4)
Cap portion 22h that periphery protrudes towards the radial outside and support 22j clamped by cap portion 22h and flange part 32, such as Fig. 6 (b) institutes
Show, coil 35 is supported in the part and is wound into octagonal shape (reference picture 1).In addition, it is being not provided with being provided projectingly portion 22
Part, the gap inserted for the inner wall part 75C of yoke 75 described later is provided between the outer peripheral face and coil 35 in cylinder portion 12.
As shown in Fig. 6 (a), have what two sides were surrounded at the one of the lower side of the flange part 32 of lens holder 2
Receiving portion 2s, as shown in Fig. 6 (b), there is position detection unit K7 detection magnet 57 in receiving portion 2s attachings.Then, make
Detection magnet 57 is fixed on to the bottom of lens holder 2 with binding agent etc..
In addition, (paper is nearby in Fig. 5 (b) downwards as shown in Fig. 5 (b), being provided with the six of the bottom surface of the side of flange part 32
Fig. 6 shown in Z2 directions) prominent columned raised setting unit 12t (three raised setting unit 12t1And three projections are set
Put portion 12t2).In addition, in Fig. 5 (b), a raised setting unit 12t1An and raised setting unit 12t2By position detection unit
K7 is blocked and not shown.Then, when assembling lens driver 101, as shown in Fig. 5 (b), three raised setting unit 12t1
Rivet and engage with downside leaf spring 3C (Part III 33 described later), and three raised setting unit 12t2Rivet and with downside leaf spring
3E (Part III 33 described later) engages.
Moreover, as shown in Fig. 5 (b), prism-shaped prominent downwards is provided with the two of the bottom surface of lens holder 2
Fixed part 12k.Then, the end turn of each coil 35 it is (not shown) respectively twisting cohesion in fixed part 12k, and be respectively welded in
Two downside leaf spring 3C and downside leaf spring 3E.In addition, in Fig. 5 (b), by the cross-hauling that is surrounded by dotted line schematically
The scolding tin HD that two end turns and downside leaf spring 3C and downside leaf spring 3E are welded is shown.
Then, the supporting member 3 of lens driver 101 is illustrated.Fig. 7 illustrates to supporting member 3
Figure, Fig. 7 (a) are the top view of upside leaf spring 3A from Z1 sides shown in Fig. 1, and Fig. 7 (b) is from Z1 sides shown in Fig. 1
Downside leaf spring 3C and downside leaf spring 3E top view.
The supporting member 3 of lens driver 101 is made by the metallic plate using copper alloy as main material, such as Fig. 4 (a) institutes
Show, the opening in the big footpath of inner peripheral surface in the cylinder portion 12 with than lens holder 2, and by being disposed in lens holder 2 and frame
Upside leaf spring 3A between shape part 44 and two downside leaf spring 3C being disposed between lens holder 2 and base component 36
And downside leaf spring 3E is formed.Then, each lens holder 2 and supporting member 3 (upside leaf spring 3A, downside leaf spring 3C, downside
Leaf spring 3E) engage respectively, supported in a manner of lens holder 2 can move to optical axis direction KD (Z-direction shown in Fig. 2)
Lens holder 2.In addition, as shown in Fig. 5 (b), downside leaf spring 3C and downside leaf spring 3E (two leaf springs) pass through scolding tin HD
Electrically connected with coil 35, therefore, also there is the function as the power supply part to coil 35.
First, as shown in Fig. 7 (a), the upside leaf spring 3A of supporting member 3 outer shape shape in the form of a substantially rectangular, form
For with：Multiple Part I 13, it is fixed on lens holder 2 (for everywhere in first embodiment of the invention)；Everywhere
Part II 23, positioned at Part I 13 outer circumferential side and be fixed on the side of casing 6 (specifically frame-shaped part 44)；Everywhere
Elastic wrist 53a, between Part I 13 and Part II 23；Linking part 63, it is extended simultaneously from Part I 13
Link；And stack portion 73, connect between Part II 23 everywhere.In addition, inner shape passes through Part I 13 and linking part
63 and form toroidal, and outer shape forms rectangular shape by Part II 23 and stack portion 73.
Then, as shown in Fig. 4 (a), when in upside, leaf spring 3A is assembled in lens driver 101, the four of Part I 13
Place is disposed in the notch part 12d of lens holder 2 everywhere face to face respectively, and Part I 13 is fixed by binding agent
With notch part 12d, thus, lens holder 2 is fixed in a upside leaf spring 3A side side.
On the other hand, being disposed of everywhere for Part II 23 is abutted with driving with the upper surface of magnet 55 respectively, and is passed through
It is clamped and fixed with magnet 55 and case member 16 by driving by frame-shaped part 44 and yoke 75, therefore, upside leaf spring
The side of casing 6 is fixed in 3A the opposing party side.
So, as shown in Fig. 7 (a), upside leaf spring 3A is configured to the shape of substantially point symmetry, and is protected relative to lens
Part 2 is held to fix in the impartial position everywhere of Part I 13, and relative to frame-shaped part 44 and then relative to casing 6
(case member 16), fixed in the impartial position everywhere of Part II 23.Thereby, it is possible to evenly supporting lens holding member
2。
Then, as shown in Fig. 7 (b), the downside leaf spring 3C and downside leaf spring 3E of supporting member 3 outer shape is substantially
Rectangular shape and respective inner shape semicircular in shape shape, are formed separately from each other substantially point symmetry.In addition, downside leaf spring 3C and
Downside leaf spring 3E is configured to have：Part III 33 at six, engages with lens holder 2；(the ginseng of Part IV 43 everywhere
According to Figure 10 (b) described later), engage with base component 36；Elastic wrist 53c and elastic wrist 53e everywhere, positioned at the 3rd
Divide between 33 and Part IV 43；First interlocking portion 83, the Part III 33 at three is connected respectively；And second interlocking portion 93,
The Part IV 43 at two is connected respectively.
In addition, as shown in Fig. 7 (b), in downside, leaf spring 3C and downside leaf spring 3E Part III 33 are respectively formed with circle
The through hole 33k of shape.In addition, the Part IV 43 in downside leaf spring 3C and downside leaf spring 3E is respectively formed with circular insertion
Hole 43m, and through hole 43s and through hole 43t formed with rectangle at one respectively.
Then, as shown in Fig. 5 (b), leaf spring 3C and downside leaf spring 3E are assembled in lens driver 101 on the downside of this
When, three raised setting unit 12t of lens holder 21(12t) is inserted and is embedded in downside leaf spring 3C Part III 33
Through hole 33k (reference picture 7 (b)), and three raised setting unit 12t of lens holder 22(12t) is inserted and is embedded in
The through hole 33k (reference picture 7 (b)) of downside leaf spring 3E Part III 33.Thus, downside leaf spring 3C and downside leaf spring 3E
One side side is positioned at lens holder 2, and is fixed on lens holder 2.In addition, now, to the convex of lens holder 2
Play setting unit 12t (12t1、12t2) implementing rivet hot, downside leaf spring 3C and downside leaf spring 3E are more reliably fixed on into lens protects
Hold part 2.
On the other hand, portion 36t (reference picture 10 (a)) inserts are provided projectingly located at the upper surface of base component 36 described later
And the through hole 43m (reference picture 7 (b)) of downside leaf spring 3C and downside leaf spring 3E Part IV 43 is embedded in (with reference to aftermentioned
Figure 10 (b)).Thus, downside leaf spring 3C and downside leaf spring 3E the opposing party side are positioned at base component 36, and are fixed on base
Base member 36.
So, as shown in Fig. 7 (b), downside leaf spring 3C and downside leaf spring 3E are configured to the shape of substantially point symmetry, phase
Connected for impartial position of the lens holder 2 at the six of Part III 33, and relative to base component 36 the 4th
The connection of impartial position everywhere of part 43.Thereby, it is possible to evenly supporting lens holding member 2.Therefore, it is configured as described above
The supporting lens holding member 2 in a manner of it can be moved to optical axis direction KD of supporting member 3.
Then, the drive mechanism M5 of lens driver 101 is illustrated.Fig. 8 is that drive mechanism M5 is illustrated
Figure, Fig. 8 (a) is the stereogram for eliminating frame-shaped part 44 and upside leaf spring 3A shown in Fig. 4 (a), and Fig. 8 (b) is omits
The upward view of downside leaf spring 3C, downside leaf spring 3E and lens holder 2 shown in Fig. 5 (b).In addition, in Fig. 8 (b)
Case member 16, upside leaf spring 3A, drive mechanism M5 and position detection unit K7 are shown.Fig. 9 is that drive mechanism M5 is carried out
The figure of explanation, Fig. 9 (a) are the top view of yoke 75 from Z1 sides shown in Fig. 1, and Fig. 9 (b) is from Z2 sides shown in Fig. 1
Yoke 75 lower section stereogram.
The drive mechanism M5 of lens driver 101, which has, makes lens holder 2 along optical axis direction KD (shown in Fig. 1
Z-direction) mobile function, as shown in Fig. 8 (a), be configured to possess：The coil 35 of ring-type, was rolled up in the week of lens holder 2
Enclose；Magnet 55 is used in four drivings, is opposed to arrange with the outside of coil 35；And yoke 75, to cover four driving magnet
55 mode arranges.
First, drive mechanism M5 coil 35 is made up of the metal wire rod that insulation-coated (coating) is applied with periphery, such as
Shown in Fig. 6 (b), the periphery of lens holder 2 is wound in, and as shown in figure 1, be shaped generally as octagonal ring-type.This
When, as shown in Fig. 6 (b), coil 35 is disposed between cap portion 22h and flange part 32, and is supported by and is fixed on everywhere from inner side
Support 22j (reference picture 6 (a)).In addition, coil 35 formed metal wire rod wind and tie up bundles of shape, but Fig. 1,
Simplified in Fig. 4, Fig. 6 (b) and Fig. 8, surface is illustrated with being set to flat condition.
In addition, in coil 35, the both ends of the metal wire rod wound can conduct, as described above, such as Fig. 5 (b) institutes
Show, end turn (not shown) is welded in two downside leaf spring 3C and downside leaf spring 3E and is electrically connected respectively.
Then, drive mechanism M5 driving with magnet 55 for example using four samarium cobalt magnets, as shown in Fig. 8 (b), to surround
The mode of optical axis is respectively arranged at the corner of case member 16 (casing 6).In addition, in order to efficiently be configured at the corner, driving
Be made into trapezoidal shape with the shape of cross section of magnet 55, warp of upper ground by the corner part 16C of yoke 75 and case member 16 (after
State) it is opposed, and leg formed along case member 16 side of sidewall portion 16A (aftermentioned) and yoke 75 periphery wall portion 75A (after
State) shape.
In addition, as shown in Fig. 8 (b), driving is configured to opposed with coil 35 with the bottom of the trapezoidal shape of magnet 55.Separately
Outside, driving is geomagnetic into inner side (the lower bottom side of trapezoidal shape) that coil 35 is opposed and being used as the opposite of inner side by the use of magnet 55
The outside (the upper bottom side of trapezoidal shape) of side forms different magnetic poles.
Then, drive mechanism M5 yoke 75 is formed by having magnetic metallic plate, as shown in Fig. 9 (a), is configured to have
Have：Periphery wall portion 75A, rectangular shape is formed during vertical view；Inner wall part 75C, four corner 75k points with periphery wall portion 75A
Liftoff opposed (reference picture 9 (b))；And upper plate portion 75T, connect corner 75k and inner wall part 75C.Then, yoke 75 passes through
A metallic plate bending is set to be made.
The periphery wall portion 75A of yoke 75 is the shape being formed continuously in addition to a part.That is, the one of periphery wall portion 75A
Part is the shape for forming breach, i.e. is substantially C word shapes during top view.As shown in Fig. 8 (a), configured in the barbed portion
There is position detection unit K7 detection magnet 57.Thus, periphery wall portion 75A does not form ring-type, when making yoke 75, nothing
Drawing process need to be carried out to metallic plate, the shape of yoke 75 can be formed by bending process.Thus, the processing of yoke 75 becomes
Obtain easily, can inexpensively make yoke 75.
In addition, as shown in Fig. 8 (b), periphery wall portion 75A is located at the outside of coil 35 and driving magnet 55, and shape
Into the shape along case member 16 (specifically side of sidewall portion 16A described later).In addition, trapezoidal shape of the driving with magnet 55
Leg abut and periphery wall portion 75A is fixed on by binding agent etc..Thus, yoke 75 and four drivings form one with magnet 55
Body.Thereby, it is possible to make efficiently to act on coil 35 come the self-driven magnetic flux with magnet 55 by yoke 75, and light can be improved
Direction of principal axis KD thrust.In addition, in the first embodiment of the present invention, periphery wall portion 75A corner 75k forms flat
Angle wall, as shown in Fig. 8 (b), preferably to be carried out pair with the almost parallel state in the upper bottom of the trapezoidal shape of magnet 55 with driving
Put.Corner 75k is not necessarily tabular, for example, it is also possible to be the curve form swelled to the side of case member 16.
In addition, the inner wall part 75C of yoke 75 is connected and opposed with corner 75k by upper plate portion 75T, located at clipping coil 35
And the driving position of magnet 55.Thus, inner wall part 75C turns into inner yoke, can make to carry out the self-driven magnetic with magnet 55
It is logical efficiently to act on coil 35, and can further improve optical axis direction KD thrust.
In addition, as shown in Fig. 9 (a), yoke 75 is formed as connecting upper plate portion 75T and corner 75k part (connecting portion)
Width dimensions are smaller than inner wall part 75C width dimensions.Therefore, even if setting inner wall part 75C, a metallic plate bending can also be made
To make yoke 75.Moreover, inner wall part 75C width dimensions can be increased, can also increase inner wall part 75C and corner 75k it
Between space.Thereby, it is possible to easily make yoke 75, and it can further improve thrust.
As more than, it is configured to lens holder 2 and coil 35 and driving magnet 55 and yoke 75 is distinguished
Arrange, therefore, in lens driver 101, line is flowed through via downside leaf spring 3C and downside leaf spring 3E from power supply by electric current
Circle 35 and the direction of caused electromagnetic force, thrust and electric current flowing accordingly acts on coil 35, moved down on lens holder 2
It is dynamic.Moreover, in the first embodiment of the present invention, driving magnet 55 is respectively arranged at is located at case member 16 round optical axis
Corner corner part 16C, therefore, it is possible to make by caused by coil 35, driving magnet 55 and yoke 75 to optical axis side
Lens holder 2 is evenly acted on to KD driving force.
Then, the frame-shaped part 44 of lens driver 101 is illustrated.Frame-shaped part 44 uses poly terephthalic acid
The synthetic resin such as butanediol ester (PBT, polybutyleneterephtalate), as shown in figure 1, frame-shaped part 44 is in center
With rectangular-shaped opening portion 44k and form the framework of rectangular shape.Then, it is assembled in lens driving in frame-shaped part 44
During device 101, as shown in Fig. 4 (a), frame-shaped part 44 is disposed in upside leaf spring 3A top, though it is not shown, it is configured to logical
Cross the corner of frame-shaped part 44 and driving clamps upside leaf spring 3A Part II 23 with magnet 55.Thus, upside leaf spring 3A
The opposing party side be fixed on the side of casing 6.
Then, the casing 6 of lens driver 101 is illustrated.Figure 10 is that the base component 36 of casing 6 is said
Bright figure, Figure 10 (a) are the top perspective view of the base component 36 from Z1 sides shown in Fig. 1, and Figure 10 (b) is to represent downside
Leaf spring 3C and downside leaf spring 3E and position detection unit K7 are assembled in the stereogram of the state of Figure 10 (a) base component 36.
In addition, in Figure 10 (a), in order that explanation is it can be readily appreciated that show position detection unit K7 Magnetic testi part 77.In addition,
In Figure 10 (b), show to be fixed on detection magnet 57 and the position detection unit K7 circuit board of lens holder 2
97。
As shown in figure 1, casing 6 forms the case member 16 of box-like and the base portion integrated with case member 16 by profile
Part 36 is formed.Then, case member 16 accommodates yoke 75 in a covered manner, and therefore, the notch part of yoke 75 grades without dew
Go out to outside, it becomes possible to prevent foreign matter intrusion lens holder 2 side.It is additionally, since case member 16 and the quilt of base component 36
Integration, therefore, picking and placeing for lens driver 101 become easy.
First, the case member 16 of casing 6 is illustrated.Case member 16 is use by nonmagnetic metal material structure
Into metallic plate and carry out what cutting off processing, drawing process etc. were made, profile shown in Fig. 1 forms box-like, and is in Fig. 3
(a) rectangular shape shown in (during top view).Then, case member 16 is configured to have：Flat side of sidewall portion
16A；Flat ceiling portion 16B, it is continuously provided with side of sidewall portion 16A upper end (the Z1 sides shown in Fig. 1)；And corner part
16C, positioned at the part connected between adjacent side of sidewall portion 16A, in opening portion 16ks of the ceiling portion 16B formed with circular shape.
In addition, case member 16 with cover lens holder 2, supporting member 3 (upside leaf spring 3A, downside leaf spring 3C, under
Side plate spring 3E), frame-shaped part 44 and drive mechanism M5 (coil 35, driving with magnet 55 and yoke 75) mode accommodates
These parts, engage with being disposed in the base component 36 of lower side (the Z2 directions shown in Fig. 2) of lens holder 2, and with
The integration of base component 36.In addition, case member 16 and yoke 75 are integrated by binding agent.
Then, the base component 36 of casing 6 is illustrated.Base component 36 is that use is identical with lens holder 2
The synthetic resin material such as liquid crystal polymer (LCP) and be made by injection molded, as shown in Figure 10 (a), its profile by
The plate-like shape of rectangle is formed, and centre part formed therein has the opening portion 36k of toroidal tubular shape.
In addition, as shown in Figure 10 (a), six prominent upward protrusions are provided with the corner of the upper surface of base component 36
(three are provided projectingly portion 36t to setting unit 36t1And three be provided projectingly portion 36t2).Then, as shown in Figure 10 (b), above
Through describing, this is provided projectingly the through hole 43m (references that portion 36t is inserted and is embedded in downside leaf spring 3C and downside leaf spring 3E
Fig. 7 (b)).In addition, now, rivet hot applied to the portion 36t that is provided projectingly of base component 36, and by downside leaf spring 3C and downside
Leaf spring 3E is more reliably fixed on base component 36.
In addition, as shown in Figure 10 (a), in base component 36, the position detection unit K7 sides (Y2 shown in Figure 10 is being equipped with
Side) it is provided with through hole 36h.Then, carried out in a manner of position detection unit K7 Magnetic testi part 77 faces through hole 36h
Arrange.In addition, arranged in a manner of position detection unit K7 detection also faces through hole 36h with magnet 57.That is, magnetic
Detection part 77 and detection are opposed via through hole 36h with magnet 57.
In addition, as shown in Figure 10 (b), by use using steel, iron or they as the materials such as the alloy of principal component metallic plate structure
Into three terminal T9 (power supply terminal T9C, power supply terminal T9E, ground terminal T9G) insert part formings and be embedded to base component 36.
The electrode pad of three terminal T9 of electric insulation installation base plates with being provided with not shown photographing element respectively electrically connects,
Can be from the electrode pad supply electric power of the installation base plate, and it is grounded on electrode pad.That is, power supply terminal T9C and feeder ear
Sub- T9E is connected to power supply, and ground terminal T9G is connected to ground.
In addition, power supply terminal T9C is in the through hole 43s of the downside leaf spring 3C shown in Figure 10 (b) part and Figure 10 (a) institutes
The connecting portion T9d electrical connections shown, and power supply terminal T9E is in the through hole 43t of the downside leaf spring 3E shown in Figure 10 (b) part
Electrically connected with the connecting portion T9f shown in Figure 10 (a).Thereby, it is possible to from power supply terminal T9C and power supply terminal T9E under
Side plate spring 3C and downside leaf spring 3E, makes current flow through coil 35 (energization).Though in addition, not shown, downside leaf spring 3C with
And the downside leaf spring 3E and power supply terminal T9C and power supply terminal T9E welding etc. that connects through is easily connected.
Though in addition, do not make detailed view, by use using copper, iron or they as the materials such as the alloy of principal component metal
The connection member 59 that plate is formed also insert part forming and is embedded to base component 36 in the same manner as three terminal T9, as shown in Fig. 3 (a),
A part for connection member 59 exposes a part in the corner of case member 16.Then, in the side of sidewall portion 16A of case member 16
After inwall is combined and positioned with the circumferential lateral surface of base component 36, divide everywhere to the connection member 59 and shell of base component 36
The junction portion of the corner of part 16 is welded, and case member 16 is fixed on into base component 36.
Finally, the position detection unit K7 of lens driver 101 is illustrated.Figure 11 (a) is position detection unit
K7 stereogram, Figure 11 (b) are the top view of the position detection unit K7 from the Z1 sides shown in Figure 11 (a).In addition, scheming
11 (b), the magneto-resistance effect element RE for being built in Magnetic testi part 77 is schematically illustrated with cross-hauling.In addition, in fig. 11
Also illustrate the detection magnet 57 for being fixed on lens holder 2.
As shown in figure 11, position detection unit K7 possesses：Magnet 57 is used in detection, is fixed on (the reference picture of lens holder 2
8(a))；Magnetic testi part 77, detection magnetic field caused by magnet 57 is detected；And circuit board 97, it is equipped with magnetic
Detection part 77.
First, position detection unit K7 detection magnet 57 for example forms approximately parallelepiped body using a samarium cobalt magnet
Shape, as shown in Fig. 6 (b), it is disposed in the lower side of the flange part 32 of lens holder 2 and is fixed on bottom.Thus, detect
Moved with magnet 57 along with the movement of lens holder 2.In addition, detection magnet 57 is magnetized in optical axis direction KD
Different magnetic poles, it can be made up of a magnet, compared with situation about being made up of two magnet, can easily arrange inspection
Magnet 57 is used in survey, and inexpensively makes the detection magnet 57.
In addition, as shown in figure 4, detection magnet 57 be disposed in yoke 75 periphery wall portion 75A formed breach position and
The breach end with periphery wall portion 75A is at a distance of impartial position (separation point position) (reference picture 4 (b)) respectively.Thus, used from detection
Magnetic field caused by magnet 57 is difficult to be influenceed by from magnetic field caused by yoke 75.It is accordingly possible to ensure position testing unit
The accuracy of detection of first K7 (detection magnet 57 and Magnetic testi part 77).
Then, the magnetoresistance that position detection unit K7 Magnetic testi part 77 is changed using resistance by the change in magnetic field
Element RE (reference picture 11 (b)), such as use the magnetic detecting element (referred to as GMR (Giant for having used huge magnetoresistance
Magneto Resistive) element).In addition, Magnetic testi part 77 is by making four portion of terminal (only show list in Figure 11 (a)
Two portion of terminal of side, and it is used as 77a and 77b to be illustrated) expose to outside, using in the synthetic resin of Thermocurable
The encapsulation for being equipped with magneto-resistance effect element RE is formed.
In addition, four conductive component 97d of Magnetic testi part 77 and aftermentioned circuit board 97 weld together, and with inspection
With magnet 57, discretely opposed mode is fixed on circuit board 97 for survey.In addition, as shown in Figure 11 (a), Magnetic testi part 77 is matched somebody with somebody
Located at the lower side (Z2 sides) of detection magnet 57.Then, Magnetic testi part 77 senses the detection for being fixed on lens holder 2
The magnetic field caused by magnet 57, and detect as the change of the magnetic field direction caused by optical axis direction KD movement.Therefore, this hair
The lens driver 101 of bright first embodiment can detect the optical axis direction KD of lens holder 2 position, and energy
Enough correct the physical location of lens holder 2.Thereby, it is possible to calibrated and position is become clear and definite lens holder 2
It is quickly removed position as defined in the position being aligned such as the focus of image.Therefore, it is possible to shorten to lens holder 2
Position determine untill time, and lens holder 2 can be made quickly and reliably to be moved to defined position.
In addition, in the first embodiment of the present invention, as shown in Figure 11 (b), when from optical axis direction KD, detection
Staggered with the center of magnet 57 with magneto-resistance effect element RE center on the radial direction RD centered on optical axis.By
This, magneto-resistance effect element RE is disposed in the orthogonal orthogonal direction (footpaths of the optical axis direction KD received with magneto-resistance effect element RE
To RD) on magnetic field (direction) the big position of change degree.Thus, with detection with the movement of magnet 57 (lens holder 2
It is mobile) change of the direction in associated magnetic field becomes big, it is possible to increase the precision of detection.
Then, position detection unit K7 circuit board 97 forms tabular, as shown in Figure 11 (a), is configured to possess：Four
Outside terminal 97c, formed by the metal parts of electric conductivity；Conductive component 97d, form one with outside terminal 97c and formed
Conductive pattern；And base part 97f, expose outside terminal 97c and bury conductive component 97d.Then, in circuit board 97
Be equipped with Magnetic testi part 77, four outside terminal 97c of circuit board 97 via conductive component 97d respectively with Magnetic testi part
77 four portion of terminal electrical connection.
In addition, when assembling lens driver 101, as shown in figure 4, circuit board 97 is disposed in detection magnet 57
Lower side.In addition, side is formed with for receiving accommodating circuit board 97, being recessed to upside below base component 36
Portion's (recess), therefore, by the way that in the receiving portion laying-out and wiring substrate 97, the side below base component 36 of circuit board 97 arranges
In the inner side of the profile of base component 36.Then, circuit board 97 is fixed in base component 36 using binding agent etc..Thus,
Compared with the situation for the side that detection is located at into lens holder 2 with magnet 57 and Magnetic testi part 77 and circuit parts,
The size (projected area) of plan view shape can be reduced.
In addition, the outside terminal 97c of circuit board 97 is formed as and above three terminal T9 (power supply terminal T9C, feeder ear
Sub- T9E, ground terminal T9G) it is extended in identical direction (the Z2 directions shown in Fig. 4).Moreover, four outside terminals
The electrode pad of the terminal T9 of 97c and base component 36 together installation base plates with being provided with not shown photographing element is electrically connected
Connect.Thus, three terminal T9 and four outside terminal 97c form a line, therefore, the installation installed for lens driver 101
The layout of substrate etc. becomes easy.
For position detection unit K7 configured as described above, movement of the detection with magnet 57 along with lens holder 2
And move, thus, change from detection magnetic flux caused by magnet 57, entered by change of the Magnetic testi part 77 to the magnetic flux
Row detection.Thus, position detection unit K7 being capable of pair position corresponding with the change of magnetic flux, the i.e. optical axis of lens holder 2
Detected direction KD position.
Finally, the action of the lens driver 101 formed to more than simply illustrates.
First, in lens driver 101, the both ends of coil 35 via downside leaf spring 3C and downside leaf spring 3E with
Power supply terminal T9C and power supply terminal T9E electrical connections, therefore, it is possible to make electric current be flowed from power supply terminal T9C and power supply terminal T9E
Cross coil 35.On the other hand, come the self-driven magnetic flux with magnet 55 sent from driving magnet 55 and from coil 35 by, by
Driving magnet 55 is returned in yoke 75.
If making electric current cross coil 35 from power supply terminal T9C effluents from the original state, according to Fleming's left-hand rule,
Coil 35 produces the electromagnetic force from the Z1 directions as optical axis direction KD towards Z2 directions.Then, lens holder 2 is in Z2 side
To movement.On the other hand, if making electric current cross coil 35 from power supply terminal T9E effluents, produce from the Z2 as optical axis direction KD
Direction is towards the electromagnetic force in Z1 directions, and lens holder 2 is in the movement of Z1 directions.Like this, by by making electric current from coil 35
Flow through and can be supported in electromagnetic force caused by coil 35, lens driver 101 while being supported by part 3, while making not make
The lenticular body of diagram is integratedly mobile along optical axis direction KD (Z-direction shown in Fig. 2) with lens holder 2.
For the effect of the lens driver 101 of first embodiment of the invention configured as described above, summarize and say
It is bright as follows.
In the lens driver 101 of the first embodiment of the present invention, drive mechanism M5 has and multiple driving magnetic
The yoke 75 that iron 55 is wholely set, therefore, it is possible to efficiently make to come the self-driven flux interaction with magnet 55 in coil 35, and energy
Enough improve optical axis direction KD thrust.In addition, with being detected for the position of the optical axis direction KD to lens holder 2
Detection position, periphery wall portion 75A of yoke 75 corresponding to magnet 57 formed jagged, therefore, produced from detection magnet 57
Raw magnetic field is difficult to be influenceed by from magnetic field caused by yoke 75.Thus it is possible to ensure position detection unit K7 (detection magnetic
Iron 57 and Magnetic testi part 77) accuracy of detection.Even if possess therefore, it is possible to provide one kind by magnetic to lens maintaining part
The composition that the optical axis direction KD of part 2 position is detected, can also ensure that the lens driver of optical axis direction KD thrust
101。
The periphery wall portion 75A of yoke 75 is continuously formed except with detection with magnet 57 in addition to corresponding part, therefore,
The periphery wall portion 75A of yoke 75 does not form ring-type, i.e. forms the shape being partially separated out corresponding with detection magnet 57
(substantially C fonts).Therefore,, can be by curved without carrying out drawing process to having magnetic metallic plate when making yoke 75
Folding is processed to form the shape of yoke 75.Thus, the processing of yoke 75 becomes easy, can inexpensively make yoke 75.
In addition, have in yoke 75 opposed with periphery wall portion 75A corner 75k with magnet 55 and coil 35 across driving
Inner wall part 75C, therefore, inner wall part 75C turns into inner yoke, can efficiently make come the self-driven flux interaction with magnet 55
In coil 35, and it can further improve optical axis direction KD thrust.In addition, connection upper plate portion 75T and corner 75k part
The width dimensions of (connecting portion) are formed as smaller than inner wall part 75C, therefore, even if setting inner wall part 75C, can also make a metal
Plate is bent to make yoke 75.Moreover, inner wall part 75C width dimensions can be increased, it can also increase inner wall part 75C and corner
Space between 75k.Thereby, it is possible to easily make yoke 75, and it can further improve thrust.
In addition, yoke 75 is covered by case member 16, expose it is therefore not necessary to which the notch part of yoke 75 grades to outside,
Foreign matter intrusion lens holder 2 side can just be prevented.It is additionally, since and is covered entirely through casing 6, therefore, lens driving dress
101 are put to pick and place and become easy.
In addition, detection magnet 57 is fixed on the bottom of lens holder 2, and it is equipped with the cloth of Magnetic testi part 77
Line substrate 97 is located at the lower side of detection magnet 57, therefore, and by detection magnet 57 and Magnetic testi part 77 and circuit
The situation that part is arranged at the side of lens holder 2 is compared, and can reduce the size (projected area) of plan view shape.
In addition, when from optical axis direction KD, the detection center of magnet 57 and magneto-resistance effect element RE center
Position is staggered, therefore, on the orthogonal direction (radial direction RD) orthogonal with optical axis direction KD suffered by magneto-resistance effect element RE
The big position of the intensity of variation in magnetic field, is equipped with magneto-resistance effect element RE.Thus, with the movement of magnet 57, (lens are protected with detection
Hold the movement of part 2) change in associated magnetic field becomes big, it is possible to increase the precision of detection.
In addition, the present invention is not limited to above-mentioned embodiment, such as it can be deformed as follows to implement, these implementations
Mode is fallen within the technical scope of the present invention.
The ＞ of ＜ variations 1
In the above-described first embodiment, yoke 75 uses a metallic plate, preferably makes periphery wall portion 75A, inner wall part
75C and upper plate portion 75T form one, but are not limited to this, can also be combined to be formed by single part.
The ＞ of ＜ variations 2
In the above-described first embodiment, yoke 75 to a metallic plate by carrying out bending process to be formed, but not
It is limited to this, can also be by carrying out punch process (including drawing process) to metallic plate to be formed.
The ＞ of ＜ variations 3
In the above-described first embodiment, it is preferred to use GMR element is used as Magnetic testi part 77, but in addition,
Can also be MR (the Magneto Resistive for the type that resistance changes by the change in magnetic field：Magnetic resistance) element, AMR
(Anisotropic Magneto Resistive：Anisotropic magnetoresistive) element, TMR (Tunnel Magneto
Resistive：Tunnel magnetoresistive).In addition, however it is not limited to the type that resistance changes by the change in magnetic field, such as can also be suddenly
That element.
The ＞ of ＜ variations 4
In the above-described first embodiment, it is preferred to use be embedded in the conductive component 97d with outside terminal 97c one
Base part 97f construction is used as circuit board 97, but is not limited to this, such as can also use and install outside terminal 97c
In the construction of general used printed circuit board (PWB, printed wiring board).
The ＞ of ＜ variations 5
In the above-described first embodiment, circuit board 97 and base component 36 are formed by independent part, but
Two parts can also be formed by a part.For example, by forming outside terminal, conductive component base component is embedded
Metal parts, base component can be also set to possess the function of circuit board.
The present invention is not limited to above-mentioned embodiment, can suitably carry out without departing from the spirit and scope of the invention
Change.
Claims (8)
1. a kind of lens driver, possesses：
The lens holder of tubular, lenticular body can be kept；
Supporting member, it is that can move in the direction of the optical axis by lens holder supporting；
Drive mechanism, said lens holding member is set to be moved along above-mentioned optical axis direction；And
Position detection unit, position of the said lens holding member on above-mentioned optical axis direction is detected, it is characterised in that
Above-mentioned position detection unit is configured to have：Detection magnet, it is fixed on said lens holding member；And magnetic detector
Part, to the detection, the magnetic field caused by magnet is detected,
Above-mentioned drive mechanism is configured to have：Coil, it is arranged to around said lens holding member；Multiple drivings are used
Magnet, it is disposed in the outside of the coil；And yoke, integratedly located at the plurality of driving magnet,
The yoke has a periphery wall portion positioned at the outside of above-mentioned coil and above-mentioned driving magnet, also, with above-mentioned detection
The above-mentioned periphery wall portion of position corresponding to magnet forms jagged.
2. lens driver according to claim 1, it is characterised in that
Above-mentioned yoke is formed by having magnetic metallic plate,
Above-mentioned periphery wall portion is continuously formed except with above-mentioned detection with magnet in addition to corresponding part.
3. lens driver according to claim 1, it is characterised in that
Be formed as the rectangular shape with four corners during the periphery wall portion top view of above-mentioned yoke,
Above-mentioned yoke possesses：Inner wall part, it is opposed with above-mentioned corner across above-mentioned driving magnet and above-mentioned coil；And upper plate
Portion, it is connected with the inner wall part and is connected with the above-mentioned corner of above-mentioned periphery wall portion.
4. lens driver according to claim 2, it is characterised in that
Be formed as the rectangular shape with four corners during the periphery wall portion top view of above-mentioned yoke,
Above-mentioned yoke possesses：Inner wall part, it is opposed with above-mentioned corner across above-mentioned driving magnet and above-mentioned coil；And upper plate
Portion, it is connected with the inner wall part and is connected with the above-mentioned corner of above-mentioned periphery wall portion.
5. lens driver according to claim 4, it is characterised in that
The width dimensions for connecting the part in above-mentioned upper plate portion and above-mentioned corner are formed as smaller than the width dimensions of above-mentioned inner wall part.
6. according to lens driver according to any one of claims 1 to 5, it is characterised in that
Possesses the casing being made up of case member and base component, the case member covers and accommodates above-mentioned yoke, the base portion
Part is disposed in the lower side of said lens holding member and integrated with the case member.
7. according to lens driver according to any one of claims 1 to 6, it is characterised in that
The bottom of said lens holding member is fixed in above-mentioned detection with magnet, and is equipped with the wiring of above-mentioned Magnetic testi part
Substrate is located at the lower side of above-mentioned detection magnet.
8. lens driver according to claim 7, it is characterised in that
Above-mentioned Magnetic testi part has the magneto-resistance effect element that resistance changes by the change in magnetic field,
Above-mentioned detection is geomagnetic into different magnetic poles in above-mentioned optical axis direction with magnet,
When from above-mentioned optical axis direction, the center of above-mentioned detection magnet is wrong with the center of above-mentioned magneto-resistance effect element
Open.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-098176 | 2016-05-16 | ||
| JP2016098176A JP6679143B2 (en) | 2016-05-16 | 2016-05-16 | Lens drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107390345A true CN107390345A (en) | 2017-11-24 |
Family
ID=60338462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710343557.9A Pending CN107390345A (en) | 2016-05-16 | 2017-05-16 | Lens driver |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6679143B2 (en) |
| CN (1) | CN107390345A (en) |
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| CN108681026A (en) * | 2018-07-04 | 2018-10-19 | 上海比路电子股份有限公司 | Lens drive motor, camera and mobile terminal apparatus |
| CN109960003A (en) * | 2017-12-25 | 2019-07-02 | 惠州大亚湾三美达光学技术有限公司 | A kind of lens driver |
| CN112241056A (en) * | 2019-07-19 | 2021-01-19 | 台湾东电化股份有限公司 | Optical element driving device |
| CN113196127A (en) * | 2018-12-14 | 2021-07-30 | 阿尔卑斯阿尔派株式会社 | Lens driving device and camera module |
| CN114080556A (en) * | 2019-09-02 | 2022-02-22 | 株式会社村田制作所 | Lens driving device |
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| JP7057492B2 (en) * | 2017-12-28 | 2022-04-20 | ミツミ電機株式会社 | Lens drive device, camera module, and camera mount device |
| WO2020111577A1 (en) * | 2018-11-26 | 2020-06-04 | 엘지이노텍(주) | Lens driving apparatus, and camera module and optical device comprising same |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2017207555A (en) | 2017-11-24 |
| JP6679143B2 (en) | 2020-04-15 |
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Address after: Tokyo, Japan, Japan Applicant after: Alpine Alpine Company Address before: Tokyo, Japan, Japan Applicant before: Alps Electric Co., Ltd. |
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