CN103309120B - Lens driver - Google Patents
Lens driver Download PDFInfo
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- CN103309120B CN103309120B CN201310047095.8A CN201310047095A CN103309120B CN 103309120 B CN103309120 B CN 103309120B CN 201310047095 A CN201310047095 A CN 201310047095A CN 103309120 B CN103309120 B CN 103309120B
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Abstract
The invention provides a kind of lens driver, make device integral miniaturization and position detection accuracy is excellent.In lens driver (1), in the 1 group of opposed side arranged along optical axis direction of automatic focusing actuator (2), pair of magnet (15a is configured with in the mode making homopolarity opposite each other, 15c), pair of magnet (15b is configured with in the mode making homopolarity opposite each other in other sides, 15d), with an end and pair of magnet (15b with the magnet (152) in pair of magnet (15c), the mode of one end overlap of the magnet (152) 15d) is configured with magnetic detecting element (19a, 19b), pair of magnet (15a, mutually opposing magnetic pole 15c) and pair of magnet (15b, mutually opposing magnetic pole 15d) is heteropole.
Description
Technical field
The present invention relates to a kind of lens driver, especially relate to the lens driver of the shake correction of the more small-sized camera being suitable for being equipped on portable phone etc.
Background technology
In recent years, the high-performance of camera, the requirement of multifunction that are equipped on portable phone etc. are improved, in the lens driver of portable phone etc. being equipped on band camera, not only require to possess automatic focusing function, also require to possess shake correcting function.As the lens driver with shake correcting function, such as, propose there is the structure (such as with reference to patent documentation 1) etc. with the shake correction coil be configured at outside permanent magnet opposedly with the permanent magnet of automatic focusing lens drive unit.
Patent documentation 1: Japanese Unexamined Patent Publication 2011-065140 publication
But, in above-mentioned lens driver in the past, because on the direction orthogonal with optical axis direction, permanent magnet is magnetized by NS, so there is the intensity that cannot improve to the magnetic field of the Hall element input be configured in below this magnet and be difficult to the problem of guaranteeing that position detection accuracy is such.In addition, during when the position detection accuracy in order to improve Hall element to make the intensity in magnetic field to Hall element input increase to object to expand the magnetization area of magnet, along with the maximization of magnet, camera actuator profile also becomes large in existence, is difficult to realize the problem that the miniaturization of lens driver is such.
Summary of the invention
The present invention carries out in view of described problem, its object is to the lens driver providing a kind of position detection accuracy excellence.
Lens driver of the present invention is, possesses: the first holder, has and can keep the lens mount of phacoid and make said lens frame along the travel mechanism of optical axis direction movement; And second holder, above-mentioned first holder is remained in the face orthogonal with optical axis direction mobile freely; The feature of said lens drive unit is, in the 1 group of opposed side arranged along optical axis direction of above-mentioned first holder, be fixed with the mode opposite each other with homopolarity is configured, be used for first direction drive the upper magnet of the first magnet centering of above-mentioned first holder above with downside magnet below the yoke that is connected; In 1 group of opposed side of above-mentioned first holder of the second direction orthogonal with above-mentioned first direction, be fixed with the mode opposite each other with homopolarity is configured, be used for above-mentioned second direction drive the upper magnet of the second magnet centering of above-mentioned first holder above with downside magnet below the yoke that is connected; Above-mentioned second holder is fixed with by above-mentioned first magnet to and the annulus that configures of mode between the above-mentioned upper magnet of above-mentioned second magnet centering and above-mentioned downside magnet; Magnetic detecting element is configured with in the mode that the both sides of an end of the above-mentioned downside magnet of an end of the above-mentioned downside magnet with above-mentioned first magnet centering and above-mentioned second magnet centering are overlapping; The mutually opposing magnetic pole that above-mentioned first magnet is right and the right mutually opposing magnetic pole of above-mentioned second magnet are heteropole.
According to said lens drive unit, owing to being configured to the right mutually opposing magnetic pole of the first magnet and the right mutually opposing magnetic pole of the second magnet is heteropole, thus form the first right magnet of the first magnet of configuring in the mode of magnetic detecting element overlap an end, with formed an end of the second right magnet of the second magnet each other for heteropole.Due to the magnetic line of force of the intensity of a magnet amount produced between an end and an end of the second magnet of this first magnet magnetic detecting element input, even if so when the magnet using magnetization area less, also higher position detection accuracy can be obtained.Therefore, it is possible to obtain making device integral miniaturization and the lens driver of position detection accuracy excellence.
In said lens drive unit, preferred above-mentioned magnetic detecting element is respectively configured with one respectively along above-mentioned first direction and above-mentioned second direction.In this case, can two magnetic detecting elements be passed through, the activation point of the automatic focusing actuator (the first holder) of first direction and second direction is detected, therefore, it is possible to cut down the components number of lens driver entirety.
Further, in said lens drive unit, preferably the above-mentioned downside magnet of above-mentioned first magnet centering and the above-mentioned downside magnet configuration of above-mentioned second magnet centering become the face of homalographic opposed.In this case, the balance of the magnetic flux between one end of one end of the downside magnet of this first magnet centering and the downside magnet of the second magnet centering becomes good, therefore, it is possible to utilize magnetic detecting element critically to detect the activation point of automatic focusing actuator (the first holder).
And, in said lens drive unit, preferably the above-mentioned downside magnet of above-mentioned first magnet centering and the above-mentioned downside magnet of above-mentioned second magnet centering are formed as, and at one end portion has bending part, have rectilinear form portion in the other end, be L shape in overlooking.In this case, in the downside magnet of the first magnet centering and the downside magnet of the second magnet centering, easily the face of homalographic is configured to opposed.
And, in said lens drive unit, the end face parallel with rectilinear form portion of the above-mentioned bending part of the above-mentioned downside magnet of above-mentioned first magnet centering can be considered, be configured to opposed with the end face in the above-mentioned rectilinear form portion of the above-mentioned downside magnet of above-mentioned second magnet centering.In this case, the downside magnet of the first magnet centering and the downside magnet of the second magnet centering can be configured along the side for rectangular-shaped the first holder in overlooking.
And, in said lens drive unit, the longest edge part vertical with rectilinear form portion of the above-mentioned bending part of the above-mentioned downside magnet of above-mentioned first magnet centering can be considered, be configured to opposed with the lateral parts in the above-mentioned rectilinear form portion of the above-mentioned downside magnet of above-mentioned second magnet centering.In this case, the area of the magnet face detected by magnetic detecting element increases, therefore, it is possible to more critically detect the activation point of automatic focusing actuator (the first holder).
And, in said lens drive unit, the multiple spheroid of sandwiched between above-mentioned first holder and above-mentioned second holder can be considered, under the state making the both sides of above-mentioned spheroid and above-mentioned first holder and above-mentioned second holder abut, above-mentioned first holder is held in above-mentioned second holder.
The effect of invention:
According to the present invention, a kind of lens driver device entirety being remained miniaturization, position detection accuracy excellence can be provided.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of the lens driver of the first embodiment.
Fig. 2 is the exploded perspective view of the lens driver of above-mentioned embodiment.
Fig. 3 is the exploded perspective view of the automatic focusing actuator that the lens driver of above-mentioned embodiment has.
Fig. 4 is the exploded perspective view of the automatic focusing actuator that the lens driver of above-mentioned embodiment has.
Fig. 5 is the stereographic map of the state after being assembled by the lens driver of above-mentioned embodiment.
Fig. 6 is upward view when having removed printed circuit board from the lens driver shown in Fig. 5.
Fig. 7 is stereographic map when having removed outside housing, magnetic holding plate and printed circuit board from the lens driver shown in Fig. 5.
Fig. 8 is that the A-A alignment of Fig. 5 looks sectional view.
Fig. 9 is the sectional view of the yoke of said lens drive unit, pair of magnet and annulus.
Figure 10 is the key diagram of the configuration of the magnetic detecting element representing said lens drive unit.
Figure 11 is upward view when having removed printed circuit board and base component from the lens driver of the second embodiment.
Figure 12 is the key diagram of the configuration of the magnetic detecting element representing said lens drive unit.
The explanation of symbol:
1,100 lens drivers; 2 automatic focusings are with actuator (the first holder); 3 base components; 31 peristomes; 32a ~ 32d boss; 33a ~ 33d reference field; 34a, 34b recess; 4 lens mounts; 41a ~ 41d retention tab; 42a ~ 42d spacer; 43a ~ 43d protrusion tab; 44a ~ 44d spacer; 45 flange; 46 tabular surfaces; 47 boss; 48a ~ 48d protrusion tab; 49a, 49b protrusion tab; 5a ~ 5d magnet; 51,52 side surface part; 53 inner circumferential faces; 6 coils; 6a, 6b both ends; 7 yokes; 71 peristomes; 72a ~ 72d stator; The sagging wall of 73a ~ 73d; 74a ~ 74d recess; 75a ~ 75d contact piece; 76a ~ 76d through hole; Leaf spring on the downside of in the of 8; Fixed part outside 81; 81a through hole; Fixed part inside 82; 82a through hole; 83 arms; Leaf spring on the upside of in the of 9; Fixed part outside 91; 91a through hole; Fixed part inside 92; 92a notch; 93 arms; 10 cap assemblies; 101 peristomes; 102a ~ 102d bearing portion; 103 fixed pins; 104 stators; 11 sheet metals; 111a ~ 111d fixed part; 12 sheet metals; 121a connecting portion; 121b brace; 13a ~ 13d spheroid; 14a ~ 14d yoke; 141,142 retention tabs; 143 protuberances (teat); 144 recesses; 15a ~ 15d pair of magnet; 151,152,153 magnet; 152a, 153a bending part; 16a ~ 16d annulus; Housing (the second holder) outside 17; 171 top parts; 172a ~ 172d side surface part; 173 peristomes; 174 stators; 18 magnetic holding plates; 181 peristomes; 182 annular portion; 19a, 19b magnetic detecting element; 20 printed circuit boards; 201 peristomes; 202 fixed parts.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described in detail.
(the first embodiment)
Fig. 1 and Fig. 2 is the exploded perspective view of the lens driver 1 of first embodiment of the invention.Fig. 3 and Fig. 4 is the exploded perspective view of the automatic focusing actuator 2 that the lens driver 1 of present embodiment has.In Fig. 1 and Fig. 3, represent the lens driver 1 of present embodiment from upper side, in Fig. 2 and Fig. 4, side represents the lens driver 1 of present embodiment from below.
As shown in Figure 1 and Figure 2, this lens driver 1 is configured to, and comprising: the automatic focusing actuator 2 carrying out the automatic focusing function of the focusing of camera; And camera axis is remained the shake correction actuator of constant shake correcting function by making automatic focusing actuator 2 trace mobile accordingly with shake.
As shown in Figure 3 and 4, the automatic focusing actuator 2 as the first holder is configured to, and comprising: the base component 3 forming bottom surface sections; The lens mount 4 of not shown phacoid can be kept; Form and make this lens mount 4 along the magnet 5a ~ 5d of the travel mechanism of optical axis direction movement, coil 6 and yoke 7; Lens mount 4 is flexibly fixed on a pair leaf spring (downside leaf spring 8 and upside leaf spring 9) of base component 3 and yoke 7; And upside leaf spring 9 is fixed on the cap assembly 10 of yoke 7.
Base component 3 is such as formed by forming the resin material of insulativity, and is arranged to rectangular-shaped.Near the central authorities of base component 3, be formed with the peristome 31 of toroidal in the position corresponding with not shown imageing sensor.In addition, four adjacent corner of base component 3 are provided with the boss 32a ~ 32d for fixing downside leaf spring 8.These boss 32a ~ 32d is out of shape by hot riveting etc. under the state of through hole 81a being inserted through downside described later leaf spring 8, thus fixing downside leaf spring 8.In addition, the state after these boss 32a ~ 32d distortion is represented in FIG.
Reference field 33a ~ the 33d of the location for lens mount 4 is provided with near the central authorities on each limit of base component 3.These reference fields 33a ~ 33d is set to flat condition, is abutted and carry out the location of this lens mount 4 by the protrusion tab 48a ~ 48d of lens mount 4 described later with these reference fields 33a ~ 33d.In addition, near reference field 33b, 33d, recess 34a, 34b is provided with.Protrusion tab 49a, 49b of lens mount 4 described later are inserted in these recesses 34a, 34b.
The state insert molding of exposing with its part for the fixing sheet metal 11 of yoke 7 is in base component 3.This sheet metal 11 has the approximate U-shaped of one side side opening by being configured with reference field 33a, has the fixed part 111a ~ 111d outstanding from its side in the position that four bights with base component 3 are corresponding.By utilizing laser bonding etc. to be fixed relative to these fixed parts 111a ~ 111d the bottom of yoke 7, yoke 7 is fixed in base component 3 thus.
In addition, the state insert molding that the pair of metal sheet material 12 connected for the conduction of downside leaf spring 8 exposes with its part is in base component 3.These sheet metals 12 have: be configured at be configured with reference field 33a inside, and the connecting portion 121a exposed on base component 3 respectively; And from the brace 121b that the side of base component 3 is given prominence to towards side a little.The part being fixed on the downside leaf spring 8 of base component 3 is connected with these connecting portions 121a by soldering etc., and downside leaf spring 8 is connected by conduction thus.
Lens mount 4 is such as formed by forming the resin material of insulativity, and is arranged to approximate cylinder shape.Be provided with at the outer peripheral face of lens mount 4 and give prominence to towards the radial outside of lens mount 4, for four retention tab 41a ~ 41d of holding coil 6.Planar portions is formed on the surface of these retention tab 41a ~ 41d.In addition, be provided with limiting coil 6 upward in the upper end of retention tab 41a ~ 41d to move and carry out the spacer 42a ~ 42d of the location of this coil 6 in side.In addition, the protrusion tab 43a ~ 43d outstanding from the outer peripheral face of lens mount 4 towards radial outside is provided with in the top of these spacers 42a ~ 42d.
Further, the spacer 44a ~ 44d of the location of carrying out upside leaf spring 9 is provided with in the upper end of these protrusion tabs 43a ~ 43d.These spacers 44a ~ 44d is arranged to give prominence to side upward from protrusion tab 43a ~ 43d, and is configured to engage with the notch 92a of upside described later leaf spring 9.By being fixed on upside leaf spring 9 with under the state that the notch 92a of upside leaf spring 9 engages, by protrusion tab 43a ~ 43d by bonding etc., upside leaf spring 9 is being fixed in lens mount 4 thus.In addition, not shown phacoid is such as screwed into the thread groove of the inner circumferential being arranged at lens mount 4 and is installed on lens mount 4.
In addition, in the bottom of lens mount 4 to be provided with flange 45 than outer peripheral face towards the mode that radial outside extends.Flange 45 is arranged to flange shape relative to lens mount 4, arranges spaced at a distance in the direction of the optical axis with spacer 42a ~ 42d.In addition, the plane that formation is orthogonal with optical axis direction above of flange 45, on the other hand, is provided with tabular surface 46 below this flange 45.Tabular surface 46 is provided with multiple boss 47, protrusion tab 48a ~ 48d and protrusion tab 49a, 49b.Boss 47 fixing for downside leaf spring 8.Protrusion tab 48a ~ 48d abuts with the reference field 33a ~ 33d of base component 3, for the location of lens mount 4.Both ends 6a, 6b of coil 6 described later are entangled on protrusion tab 49a, 49b.
Magnet 5a ~ 5d has orthogonal a pair side surface part 51,52 and the inner circumferential face 53 of circular shape respectively, and this magnet 5a ~ 5d is individually fixed in the four corners of yoke 7.In this case, make the internal face of side surface part 51,52 and yoke 7 four jiaos opposed and under making the opposed state of sagging wall 73a ~ 73d of inner circumferential face 53 yokes 7 spaced apart and described later, fixed magnet 5a ~ 5d.
Coil 6 is directly wound in the retention tab 41a ~ 41d of the outer peripheral face being arranged on lens mount 4.By being wound in retention tab 41a ~ 41d, coil 6 become the part corresponding with these retention tab 41a ~ 41d be configured to linearity, be bundled into the annular state of approximate circle.Both ends 6a, 6b of coil 6 are drawn by the following side of the flange 45 towards lens mount 4 respectively and are entangled on protrusion tab 49a, 49b.
Yoke 7 is such as formed by carrying out machining to the metal material of magnetic, and is arranged to the box like to the lower side opening shown in Fig. 3.In addition, yoke 7 is arranged to approximate rectangular shape, is provided with the peristome 71 of toroidal in the central authorities of this yoke 7.Stator 72a ~ 72d outstanding towards side, side is a little provided with in the bottom of yoke 7 four jiaos.These stators 72a ~ 72d is arranged to the size overlapping with the fixed part 111a ~ 111d of the sheet metal 11 that the four corners from base component 3 is given prominence to.
Sagging wall 73a ~ 73d is arranged at the position corresponding with the four corners of yoke 7 of the circumference of peristome 71 floppily.These sagging wall 73a ~ 73d are configured between the outer peripheral face of lens mount 4 and the inner peripheral surface of coil 6 under the state being configured with lens mount 4.Further, the position between the sagging wall 73a ~ 73d of the circumference of peristome 71, is provided with the recess 74a ~ 74d of the protrusion tab 43a ~ 43d that can receive lens mount 4.Further, a pair contact piece 75a ~ 75d outstanding towards the inner side of peristome 71 is a little provided with in the side of these recesses 74a ~ 74d.Further, through hole 76a ~ 76d that the fixed pin 103 for cap assembly 10 described later inserts is provided with near the four corners on yoke 7.
Downside leaf spring 8 forms elastomeric element, such as, form by forming conductive materials such as phosphor bronzes.Downside leaf spring 8 is made up of a pair leaf spring, and each leaf spring has respectively: the outside fixed part 81 being fixed on base component 3; Be fixed on the inner side fixed part 82 below lens mount 4; And link the arm 83 of outside fixed part 81 and inner side fixed part 82.The assigned position of outside fixed part 81 is provided with multiple through hole 81a.By to be inserted into by the boss 32a ~ 32d of base component 3 in these through holes 81a and to rivet, downside leaf spring 8 is fixed in base component 3 thus.In addition, the assigned position of inner side fixed part 82 is provided with multiple through hole 82a.By to be inserted into by the multiple boss 47 be arranged at below lens mount 4 in these through holes 82a and to rivet, downside leaf spring 8 is fixed in lens mount 4 thus.Arm 83 is repeatedly turned back from the position of the outside fixed part 81 corresponding with the four corners of base component 3, outside fixed part 81 and inner side fixed part 82 is linked.
Upside leaf spring 9 is same with downside leaf spring 8, such as, form by forming conductive materials such as phosphor bronzes.Upside leaf spring 9 has: be fixed on yoke 7 above and there is annular outside fixed part 91; Be fixed on lens mount 4 above and there is the inner side fixed part 92 of toroidal; And link the arm 93 of fixed part 91 and inner side fixed part 92 outside these.The assigned position of outside fixed part 91 is provided with multiple through hole 91a.Under the state that the fixed pin 103 of cap assembly 10 described later is inserted through these through holes 91a, upside leaf spring 9 is fixed in yoke 7.In addition, the assigned position of inner side fixed part 92 is provided with multiple notch 92a.Under the state of spacer 44a ~ 44d that these notchs 92a has received lens mount 4, upside leaf spring 9 is fixed in lens mount 4.Arm 93 is repeatedly turned back from the position of the outside fixed part 91 corresponding with the four corners of yoke 7, outside fixed part 91 and inner side fixed part 92 is linked.
Cap assembly 10 is such as formed by forming the resin material of insulativity.Cap assembly 10 is arranged to approximate rectangular shape, is provided with the peristome 101 of toroidal in the central authorities of this cap assembly 10.Cap assembly 10 is configured to, and has the shape roughly the same with the profile above yoke 7, and peristome 101 is corresponding with the peristome 71 of yoke 7.Bearing portion 102a ~ the 102d be made up of the recess of the dome shape for receiving spheroid 13a ~ 13d described later is provided with in four bights of cap assembly 10.Multiple fixed pin 103 is provided with below cap assembly 10, in the position corresponding with its four corners.These fixed pins 103 are out of shape by hot riveting etc. under the state being inserted through the upside through hole 91a of the leaf spring 9 and through hole 76a ~ 76d of yoke 7, are fixed on above yoke 7 by upside leaf spring 9 thus.In addition, the state after these boss 32a ~ 32d distortion is represented in fig. 2.
The upper side middle position on each limit of cap assembly 10 is provided with the stator 104 that side is outstanding outward.These stators 104 and the recess 144 of yoke 14a described later ~ 14d combine and for the location of yoke 14a ~ 14d and fixing.
Then, each parts forming shake correction actuator are described.As shown in Figure 1 and Figure 2, shake correction actuator is configured to, and comprising: the spheroid 13a ~ 13d forming thrust bearing; Pair of magnet 15a ~ the 15d kept by yoke 14a ~ 14d; Annulus 16a ~ 16d; Insert molding is in the magnetic holding plate 18 of the outside housing 17 as the second holder; And be configured with the printed circuit board 20 of magnetic detecting element 19a, 19b.
Spheroid 13a ~ 13d is such as made up of the hard sphere of nonmagnetic metal material.A part of spheroid 13a ~ 13d is accommodated in the bearing portion 102a ~ 102d of cap assembly 10, abuts below the annular portion 182 of the part exposed from bearing portion 102a ~ 102d and magnetic holding plate 18 described later.In addition, Bearing inner gap is produced being accommodated between the spheroid 13a ~ 13d of bearing portion 102a ~ 102d and bearing portion 102a ~ 102d.
Yoke 14a ~ 14d is such as formed by carrying out machining to the metal material of magnetic, and is arranged to approximate slab shape.The retention tab 141,142 vertically extended from these both ends is provided with at the both ends of the above-below direction of yoke 14a ~ 14d.These retention tabs 141,142 have rectangular shape in overlooking, and mutually extend in the same direction.
In addition, the protuberance 143 of the cross section U-shaped of vertically giving prominence to from the planar section of yoke 14a ~ 14d is provided with at the middle position of yoke 14a ~ 14d.This protuberance 143 has rectangular shape, and gives prominence to towards with retention tab 141,142 identical directions.
Be provided with rectangular-shaped for a part for this retention tab 141 the recess 144 excised at the middle position of the retention tab 141 of yoke 14a ~ 14d.The stator 104 being arranged at cap assembly 10 is inserted in this recess 144.
Pair of magnet 15a ~ 15d is made up of magnet 151 and magnet 152.Upper magnet 151 has rectangular shape.Downside magnet 152 is configured to, and at one end portion has the bending part 152a of direction, the inner side vertically bending towards lens driver 1, has rectilinear form portion in the other end, is approximate L shape in overlooking.
Magnet 151,152 with the upper state be separated of optical axis direction (above-below direction) opposed configure.Magnet 151,152 is magnetized (with reference to Fig. 9) in the mode that upper side one half-sum lower side one semi-polarity shown in Fig. 1 is different respectively.Further, magnet 151,152 configures with the state making homopolarity opposite each other on optical axis direction (above-below direction).Such as, in pair of magnet 15a, magnet 151 is configured to upper side half and is S pole and lower side half is N pole, and magnet 152 is configured to upper side half and is N pole and lower side half is S pole, and N is extremely mutually opposing.
The upper surface portion of the upper magnet 151 in pair of magnet 15a ~ 15d is bonded and fixed to the retention tab 141 of yoke 14a ~ 14d.In addition, the lower face of the downside magnet 152 in pair of magnet 15a ~ 15d is bonded and fixed to the retention tab 142 of yoke 14a ~ 14d.Thus, the upper surface portion of magnet 151 has with the lower face of magnet 152 structure be connected via yoke 14a ~ 14d.
Magnet 151,152 is configured to, and the long limit of the upper surface portion shown in Fig. 1 is than the long length of side of the retention tab 141,142 of yoke 14a ~ 14d.In addition, magnet 151,152 is configured to, and the minor face of the upper surface portion shown in Fig. 1 is roughly the same length with the minor face of retention tab 141,142.Thus, being configured to, when this magnet 151,152 being fixed on retention tab 141,142 making magnet 151,152 consistent with the center of retention tab 141,142, exposing from retention tab 141,142 near the two ends of magnet 151,152.
Annulus 16a ~ 16d is configured to, and is bundled into ring-shaped, and the protuberance 143 of yoke 14a ~ 14d can be inserted into its inner peripheral portion.In addition, be configured to, when protuberance 143 is inserted into the inner peripheral portion of annulus 16a ~ 16d, between the magnet 151 forming pair of magnet 15a ~ 15d and magnet 152, produce gap respectively.
Outside housing 17 is such as formed by forming the resin material of insulativity, and is arranged to the box like to the lower side opening shown in Fig. 1.Outside housing 17 has: be arranged to rectangular-shaped top part 171; And the side surface part 172a ~ 172d to arrange floppily from the outer edge of this top part 171.The peristome 173 of toroidal is provided with in the central authorities of top part 171.Peristome 173 is configured to, corresponding with the peristome 71 of the annular portion 182 of magnetic holding plate 18 described later, the peristome 101 of cap assembly 10 and yoke 7.
In addition, the bottom middle position of the side surface part 172c of side body 17 is provided with the stator 174 (with reference to Fig. 2) of side extension outward outside.Arranging this stator 174 is to be fixed distributions such as the wires be connected with lens driver 1 together with the fixed part 202 of printed circuit board 20 described later.
Magnetic holding plate 18 is arranged to approximate rectangular shape, and insert molding is below the top part 171 of outside housing 17.By being arranged to such structure, do not need, using being used for being fixed on the magnetic holding plate of outside housing 17 as miscellaneous part, can components number be cut down.In addition, in Fig. 1,2, magnetic holding plate 18 is extracted out expression for convenience of explanation.
Be provided with the peristome 181 of toroidal in the central authorities of magnetic holding plate 18, be provided with towards the outstanding annular portion 182 of the upper side shown in Fig. 1 at the circumference of peristome 181.The external diameter of annular portion 182 is identical with the external diameter of the peristome 173 of outside housing 17.In addition, insert molding is configured on same level in the upper surface portion of the annular portion 182 of the magnetic holding plate 18 of the top part 171 of outside housing 17 and the upper surface portion of top part 171.
Be configured in the magnetic holding plate 18 of the top part 171 of outside housing 17 in insert molding, the limit size of the part exposed below top part 171, with form pair of magnet 15a ~ 15d magnet 151,152 Fig. 1 shown in the length on long limit of upper surface portion roughly equal.
Magnetic detecting element 19a, 19b are such as made up of Hall element, are fixed on the printed circuit board 20 for mounted lens drive unit 1.Near the end that magnetic detecting element 19a, 19b are configured at the 2 adjacent limits of printed circuit board 20 and be the lower side of yoke 14c, pair of magnet 15c and annulus 16c and yoke 14d, pair of magnet 15d and annulus 16d.
Printed circuit board 20 across inner space opposed with the top part 171 of outside housing 17 configure.Printed circuit board 20 is such as made up of epoxy glass substrate, and is configured to the rectangular-shaped of shape roughly the same with outside housing 17.The central authorities of printed circuit board 20 are provided with rectangular-shaped peristome 201.At printed circuit board 20 while be provided with the fixed part 202 for connecting the distributions such as wire.
Then, the state after the lens driver 1 assembling present embodiment is described.Fig. 5 is the stereographic map of the state after assembling lens driver 1.Fig. 6 is upward view when having removed printed circuit board 20 from the lens driver 1 shown in Fig. 5.Fig. 7 is stereographic map when having removed outside housing 17, magnetic holding plate 18 and printed circuit board 20 from the lens driver 1 shown in Fig. 5.Fig. 8 be state after assembling lens driver 1, the A-A alignment shown in Fig. 5 looks sectional view.
As shown in Figure 5, when assembling has the lens driver 1 of this structure, at the inside configuration automatic focusing actuator 2 in the space surrounded by outside housing 17 and printed circuit board 20.At automatic focusing with in actuator 2, be configured with lens mount 4 in the inside of the peristome 101 of cap assembly 10.Not shown phacoid is assembled in this lens mount 4 by being screwed into from the upper side shown in Fig. 5, and this phacoid is configured to move integratedly with this lens mount 4.
As shown in Figure 6, automatic focusing actuator 2 is configured at the center of outside housing 17.Be fixed with the yoke 14a ~ 14d of pair of magnet 15a ~ 15d respectively, be arranged on each side along optical axis direction of automatic focusing actuator 2.Specifically, the planar section of yoke 14a ~ 14d is individually fixed in the outside wall surface of the side surface part of yoke 7.In addition, at automatic focusing actuator 2 and be provided with between the yoke 14a ~ 14d of pair of magnet 15a ~ 15d and the outside wall surface of outside housing 17 and produce gap.
The bending part 152a of the magnet 152 in pair of magnet 15a ~ 15d is configured to the angle part along automatic focusing actuator 2.Now, to be configured to the end face being parallel to rectilinear form portion of bending part 152a opposed with the end face in rectilinear form portion for each magnet 152.Thereby, it is possible to configure each magnet 152 along the side of automatic focusing actuator 2.
Annulus 16a ~ 16d is fixed on the inwall of the side surface part 172a ~ 172d of outside housing 17.Under the state so secured, annulus 16a ~ 16d is configured to overlapping with magnet 152 respectively.
Magnetic detecting element 19a is configured to overlapping with an end of the magnet 152 in the bending part 152a of the magnet 152 in pair of magnet 15b and pair of magnet 15c.In addition, magnetic detecting element 19b is configured to overlapping with an end of the magnet 152 in the bending part 152a of the magnet 152 in pair of magnet 15c and pair of magnet 15d.
As shown in Figure 7, at automatic focusing with in actuator 2, in the inside of cap assembly 10, yoke 7 and lens mount 4 are configured with upside leaf spring 9.In addition, in the bearing portion 102a ~ 102d of cap assembly 10, spheroid 13a ~ 13d can be accommodated with rotatably respectively.The stator 104 of cap assembly 10 is embedded in the recess 144 that the retention tab 141 of yoke 14a ~ 14d fixing in the outside wall surface of the side surface part of yoke 7 is arranged.
In lens driver 1, clip automatic focusing actuator 2 and pair of magnet 15a arranged opposite and 15c and pair of magnet 15b and 15d is configured to respectively, the opposed magnetic pole of magnet 151,152 is homopolarity.In addition, the opposed magnetic pole of the magnet 151,152 in pair of magnet 15a and 15c and pair of magnet 15b and 15d is heteropole.That is, be configured in lens driver 1, the magnetic field that X-direction and Y direction are formed by magnet towards the opposite.
As shown in Figure 8, the part exposed from bearing portion 102a ~ 102d of spheroid 13a ~ 13d and magnetic holding plate 18 annular portion 182 below abut.So, owing to abutting below spheroid 13a ~ 13d and the insert molding magnetic holding plate 18 below top part 171, so can prevent from being cut below top part 171 or wearing and tearing.
Owing to producing Bearing inner gap being accommodated between the spheroid 13a ~ 13d of bearing portion 102a ~ 102d and bearing portion 102a ~ 102d, so spheroid 13a ~ 13d can roll mobile in bearing portion 102a ~ 102d.Now, spheroid 13a ~ 13d moves in the lower surface of the annular portion 182 of magnetic holding plate 18, thus automatic focusing actuator 2 can be made freely to move on the direction orthogonal with optical axis direction.
Lens mount 4 is configured with in the inside of the peristome 101 of cap assembly 10.Lens mount 4 is fixed on base component 3 by downside leaf spring 8, on the other hand, is fixed on yoke 7 by upside leaf spring 9, utilizes the applying power of leaf spring 8 and upside leaf spring 9 on the downside of these that lens mount 4 is remained on original state.In addition, between the outside wall portions and sagging wall 73a (73c) of yoke 7, be configured with magnet 5a (5c) fixing on the inner wall part in four bights of yoke 7 and coil 6.
Then, the action of the lens driver 1 of present embodiment is described.First, the action of automatic focusing actuator 2 is described.The movement of optical axis direction of automatic focusing actuator 2 pairs of phacoiies, the movement of the Z-direction namely shown in Fig. 7 control.
As shown in Figure 8, at automatic focusing with in actuator 2, be configured at the periphery of magnet 5a ~ 5d of four corners, such as, producing and arrive the sagging wall 73a ~ 73d of yoke 7 from the inner circumferential face 53 of magnet 5a ~ 5d via coil 6 and turn back to the magnetic field of the outer peripheral face of magnet 5a ~ 5d via the upper surface portion of yoke 7 and outside wall portions.When being energized to the coil 6 of the outer peripheral face being held in lens mount 4, the magnetic field that the electric current flow through in coil 6 and magnet 5a ~ 5d produce acts on, and produces thus and makes coil 6 towards the thrust of the above-below direction movement shown in Fig. 8.Thus, lens mount 4 overcomes the applying power of downside leaf spring 8 and upside leaf spring 9 and moves in the vertical direction.
At automatic focusing with in actuator 2, such as, according to the driving instruction from the portable phone of lift-launch lens driver 1 main body, the control part of digital camera, control the magnitude of current that coil 6 is energized, thus this thrust is controlled, make coil 6 move up and down and carry out the location of this coil 6.Thereby, it is possible to carry out the location of the lens mount 4 of holding coil 6, and the location of the phacoid being assembled in lens mount 4 can be carried out.In addition, when stopping being energized to coil 6, lens mount 4 returns to initial position by the applying power of downside leaf spring 8 and upside leaf spring 9.
Then, be described with reference to the action of Fig. 9 to the shake correction actuator of lens driver 1.In the action of shake correction actuator, the movement of the movement of automatic focusing actuator 2 in the face orthogonal with optical axis direction, X-direction namely shown in Fig. 7 and Y direction is controlled.
Fig. 9 is yoke 14a, the pair of magnet 15a of lens driver 1 and the sectional view of annulus 16a.Magnet 151,152 in pair of magnet 15a configures in the mode that homopolarity is opposite each other.Such as, as shown in Figure 9, magnet 151 is configured to, and upside half (being fixed on the part of the retention tab 141 of yoke 14a) is S pole, and downside half (part opposed with the protuberance 143 of yoke 14a) is N pole.Magnet 152 is configured to, and upside half (part opposed with the protuberance 143 of yoke 14a) is N pole, and downside half (being fixed on the part of the retention tab 142 of yoke 14a) is S pole.
Be configured in this case, the magnetic line of force sent from the N pole of magnet 151 turns back to S pole via the upper part of protuberance 143 and retention tab 141.That is, the magnetic field around magnet 151 produces as shown in the arrow B of Fig. 9.Thus, be configured to, magnetic holding plate 18 is drawn by towards magnet 151 side draught.Because magnetic holding plate 18 insert molding is in the top part 171 of outside housing 17, so outside housing 17 is also drawn by towards magnet 151 side draught together with magnetic holding plate 18.Thus, be configured to, spheroid 13a ~ 13d is pushed and is held in below the annular portion 182 of magnetic holding plate 18.
Yoke 14a, the pair of magnet 15a of lens driver 1 and annulus 16a, together with their yoke 14c arranged opposite, pair of magnet 15c and annulus 16c (with reference to Fig. 7), the movement of the X-direction shown in Fig. 7 is controlled with clipping automatic focusing actuator 2.
Such as, when a part for magnet 151 side for annulus 16a, on the Y-axis positive dirction (from the inboard court of paper nearby direction) shown in Fig. 9, during streaming current, annulus 16a produces the power (Lorentz force) in the direction (X-axis positive dirction) shown in arrow F.
Now, the part in magnet 152 side of annulus 16a, shown in Fig. 9 Y-axis negative direction (from paper nearby inwardly side to) streaming current.In addition, be configured to, the magnetic line of force sent from the N pole of magnet 152 turns back to S pole via the lower part of the protuberance 143 of yoke 14a and retention tab 142.That is, the magnetic field around magnet 152 produces as shown in the arrow B of Fig. 9.Therefore, the power in the direction (X-axis positive dirction) shown in arrow F is produced at annulus 16a.
In this case, because annulus 16a is fixed on outside housing 17, so apply the power of X-axis negative direction to automatic focusing actuator 2, along with the rotation of spheroid 13a ~ 13d, automatic focusing actuator 2 entirety moves towards X-axis negative direction.
On the other hand, when magnet 151 side for annulus 16a a part, shown in Fig. 9 Y-axis negative direction (from paper nearby inwardly side to) streaming current time, annulus 16a produces the power of X-axis negative direction.Now, due to a part for magnet 152 side for annulus 16a, on the Y-axis positive dirction (from paper inboard towards nearby direction) shown in Fig. 9 streaming current, so produce the power of X-axis negative direction on annulus 16a.
In this case, because annulus 16a is fixed on outside housing 17, so apply the power of X-axis positive dirction to automatic focusing actuator 2, along with the rotation of spheroid 13a ~ 13d, automatic focusing actuator 2 entirety moves towards X-axis positive dirction.
Like this, be configured in lens driver 1, because annulus 16a is configured between pair of magnet 15a via yoke 14a, so the upper portion of annulus 16a is configured in the magnetic field around magnet 151, the lower portion of annulus 16a is configured in the magnetic field around magnet 152.Therefore, when when annulus 16a streaming current, the part of the annulus 16a flow through in each magnetic field, at electric current produces power (Lorentz force).The power obtained owing to applying these power to be added to automatic focusing actuator 2, even if so when the magnet using magnetization area less, also can obtain larger driving force.
Similarly, yoke 14b, the pair of magnet 15b of lens driver 1 and annulus 16b, together with their yoke 14d arranged opposite, pair of magnet 15d and annulus 16d (with reference to Fig. 7), the movement of the Y direction shown in Fig. 7 is controlled with clipping automatic focusing actuator 2.That is, be configured to, by the electric current flowed in annulus 16b, 16d towards switching, automatic focusing actuator 2 can be made to move in the Y-axis direction.
Because yoke 14a ~ 14d and pair of magnet 15a ~ 15d is individually fixed in whole side of automatic focusing actuator 2, so the magnetic field for making automatic focusing actuator 2 movement in the face orthogonal with optical axis direction can be produced around automatic focusing actuator 2 equably.Thereby, it is possible to critically carry out shake correction.
Like this, by utilizing spheroid 13a ~ 13d, yoke 14a ~ 14d, pair of magnet 15a ~ 15d and the movement of annulus 16a ~ 16d to X-direction and Y direction to control, automatic focusing actuator 2 can move relative to outside housing 17 and carry out shake correction in the face orthogonal with optical axis direction thus.Such as, by indicating according to the driving from the lift-launch portable phone of lens driver 1, the control part of digital camera, control the magnitude of current that annulus 16a ~ 16d is energized and direction and control to put on the power of annulus 16a ~ 16d, carrying out shake correction thus.Thereby, it is possible to carry out the location of automatic focusing actuator 2 in the face orthogonal with optical axis direction.In addition, when stopping being energized to annulus 16a ~ 16d, automatic focusing actuator 2 passes through the attractive force between the magnet 151 of pair of magnet 15a ~ 15d and magnetic holding plate 18 and returns to initial position.
As shown in Figure 6, magnetic detecting element 19b be configured to lens driver 1, the bending part 152a of magnet 152 in an end of magnet 152 in pair of magnet 15d and pair of magnet 15c is overlapping.Figure 10 is the key diagram of the configuration representing magnetic detecting element 19b.
It is opposite each other that magnet 151,152 in adjacent pair of magnet 15d, 15c is configured to homopolarity respectively, and in pair of magnet 15d, 15c, be configured to this opposed magnetic pole be heteropole.Such as, in pair of magnet 15d, when with S extremely opposite each other mode distributed magnet 151,152, in pair of magnet 15c, with the mode distributed magnet 151,152 that N is extremely opposite each other.
According to above-mentioned example, in pair of magnet 15d, the magnetic pole in the face of the magnet 152 opposed with magnetic detecting element 19b is N pole.In addition, in pair of magnet 15c, the magnetic pole in the face of the magnet 152 opposed with magnetic detecting element 19b is S pole (with reference to Figure 10 A).
In this case, magnetic detecting element 19b is inputted from the magnet 152 pair of magnet 15d towards the magnet 152 in pair of magnet 15c, namely from N pole to send and towards the magnetic line of force (with reference to Figure 10 B) of S pole.Thus, magnetic detecting element 19b can obtain with automatic focusing actuator 2 in the directly proportional output of the amount of movement of X-direction.
Magnet 152 in pair of magnet 15c has bending part 152a, and be configured to thus in adjacent pair of magnet 15d, 15c, the face of the homalographic of magnet 152 is opposite each other.Therefore, balance between two magnet and produce magnetic flux well, and input abreast towards magnetic detecting element 19b, therefore, it is possible to detect amount of movement exactly.
Similarly, magnetic detecting element 19a be configured to lens driver 1, an end of magnet 152 in the bending part 152a of magnet 152 in pair of magnet 15b and pair of magnet 15c is overlapping.
It is opposite each other that magnet 151,152 in adjacent pair of magnet 15b, 15c is configured to homopolarity respectively, and in pair of magnet 15b, 15c, be configured to this opposed magnetic pole be heteropole.
Such as, in pair of magnet 15b with S extremely opposite each other mode distributed magnet 151,152, in pair of magnet 15c, with the mode distributed magnet 151,152 that N is extremely opposite each other.According to this example, in pair of magnet 15b, the magnetic pole in the face of the magnet 152 opposed with magnetic detecting element 19a is N pole.In addition, in pair of magnet 15c, the magnetic pole in the face of the magnet 152 opposed with magnetic detecting element 19a is S pole.
In this case, magnetic detecting element 19a is inputted from the magnet 152 pair of magnet 15b towards the magnet 152 in pair of magnet 15c, namely from N pole to send and towards the magnetic line of force of S pole.Thus, magnetic detecting element 19b can obtain with automatic focusing actuator 2 in the directly proportional output of the amount of movement of Y direction.
So, by magnetic detecting element 19a, 19b, can detect the amount of movement of the X-direction of automatic focusing actuator 2 and Y direction.Therefore, it is possible to detected by the activation point of two magnetic detecting elements to automatic focusing actuator 2, therefore, it is possible to cut down the components number of lens driver 1 entirety.
As described above, according to the lens driver 1 of the first embodiment, consist of, clip automatic focusing actuator 2 and mutually opposing magnetic pole in pair of magnet 15a arranged opposite and 15c, with clip automatic focusing actuator 2 and mutually opposing magnetic pole in pair of magnet 15b arranged opposite and 15d is heteropole, therefore, an end of each magnet 152 in the adjacent pair of magnet 15a ~ 15d configured in the mode overlapping with magnetic detecting element 19a, 19b is heteropole each other.Due to the magnetic line of force of the intensity of a magnet amount produced between the magnet 152 of this heteropole each other magnetic detecting element 19a, 19b input, even if so when use magnetization area less magnet 152, also higher position detection accuracy can be obtained.Therefore, it is possible to obtain making device integral miniaturization and the lens driver 1 of position detection accuracy excellence.
(the second embodiment)
In the lens driver 100 of the second embodiment, in the shape of the magnet 153 of pair of magnet 15a ~ 15d and the different this point of the configuration of configuration and magnetic detecting element 19a, 19b, different from the lens driver 1 of the first embodiment.Below, centered by the difference of the lens driver 1 with the first embodiment, the structure of the lens driver 100 of the second embodiment is described.
Figure 11 is upward view when having removed printed circuit board 20 and base component 3 from lens driver 100.The magnet 153 of the pair of magnet 15a ~ 15d of lens driver 100 is configured to, same with the magnet 152 of the pair of magnet 15a ~ 15d of the lens driver 1 of the first embodiment, at one end portion has towards the bending part 153a of direction, the inner side vertically bending of lens driver 100, there is in the other end rectilinear form portion, and be approximate L-shaped shape in overlooking.
When comparing magnet 152 and magnet 153, the area of the bending part 153a of magnet 153 is greater than the area of the bending part 152a of magnet 152.Because the width of magnet 152,153 is identical, so can say that the bending part 153a of magnet 153 is compared with the bending part 152a of magnet 152, the length of the longest edge vertical with rectilinear form portion is also long.
As shown in figure 11, adjacent magnet 153 in pair of magnet 15a ~ 15d is configured to, in the four corners of automatic focusing with actuator 2, the longest edge part vertical with rectilinear form portion of the bending part 153a of a side is opposed abreast with the lateral parts in the rectilinear form portion of the opposing party.
Magnetic detecting element 19a is configured to overlapping with the rectilinear form portion in the bending part 153a of the magnet 153 in pair of magnet 15a and pair of magnet 15d.In addition, magnetic detecting element 19b is configured to overlapping with the rectilinear form portion of the magnet 153 in the bending part 153a of the magnet 153 in pair of magnet 15b and pair of magnet 15a.Now, the state that the length on the long limit of magnetic detecting element 19a (19b) is roughly consistent with the length of the longest edge vertical with rectilinear form portion of the bending part 153a of the magnet 153 in pair of magnet 15a (15b) is become.
Figure 12 is the key diagram of the configuration representing magnetic detecting element 19a.Magnet 151,153 in adjacent pair of magnet 15a, 15d configures in the mode that homopolarity is opposite each other respectively, and in pair of magnet 15a, 15d, be configured to this opposed magnetic pole be heteropole.Such as, in pair of magnet 15a with S extremely opposite each other mode distributed magnet 151,153, with the mode distributed magnet 151,153 that N is extremely opposite each other in pair of magnet 15d.
According to above-mentioned example, in pair of magnet 15a, the magnetic pole in the face of the magnet 153 opposed with magnetic detecting element 19a is N pole.In addition, in pair of magnet 15d, the magnetic pole in the face of the magnet 153 opposed with magnetic detecting element 19a is S pole (with reference to Figure 12 A).
In this case, magnetic detecting element 19a is inputted from the magnet 153 pair of magnet 15a towards the magnet 153 in pair of magnet 15d, namely from N pole to send and towards the magnetic line of force (with reference to Figure 12 B) of S pole.Thus, magnetic detecting element 19a can obtain output directly proportional with the amount of movement of the Y direction of automatic focusing actuator 2.
Magnet 153 in pair of magnet 15a has bending part 153a, and thus, in adjacent pair of magnet 15a, 15d, magnet 153 is configured to, and the area portions with the length roughly equal with the long limit of magnetic detecting element 19a is opposed.Therefore, balance between two magnet and produce magnetic flux well, and input abreast towards magnetic detecting element 19a, therefore, it is possible to detect amount of movement exactly.In addition, compared with the lens driver 1 of the first embodiment, the area of the magnet face detected by magnetic detecting element 19a is increased, and therefore, the magnetic line of force of input magnetic detecting element 19a also increases, and can improve position detection accuracy further.
On the other hand, magnetic detecting element 19b is inputted from the magnet 153 pair of magnet 15a towards the magnet 153 in pair of magnet 15b, namely from N pole to send and towards the magnetic line of force of S pole.Thus, magnetic detecting element 19b can obtain output directly proportional with the amount of movement of the X-direction of automatic focusing actuator 2.
So, can be detected the amount of movement of the X-direction of automatic focusing actuator 2 and Y direction by magnetic detecting element 19a, 19b.Therefore, it is possible to detected by the activation point of two magnetic detecting elements to automatic focusing actuator 2, therefore, it is possible to cut down the components number of lens driver 100 entirety.
As described above, according to the lens driver 100 of the second embodiment, in adjacent pair of magnet 15a ~ 15d, the longest edge part vertical with rectilinear form portion being configured to the bending part 153a of magnet 153 is respectively opposed with the lateral parts in the rectilinear form portion of magnet 153, therefore, the area of the magnet face detected by magnetic detecting element 19a, 19b is increased, even if when use magnetization area less magnet 153, also can obtain higher position detection accuracy.Therefore, it is possible to obtain making device integral miniaturization and the lens driver 100 of position detection accuracy excellence.
In addition, the present invention is not limited to above-mentioned embodiment, can carry out various change and be implemented.In the above-described embodiment, size shown in the drawings, shape etc. are not limited thereto, and suitably can change in the scope playing effect of the present invention.In addition, only otherwise the scope departing from object of the present invention just can carry out suitably changing also being implemented.
Such as, in the above-described embodiment, use the situation of spheroid 13a ~ 13d to be illustrated to the structure as shake correction actuator, but the structure of shake correction actuator is not limited thereto, and can suitably change.Such as, shaking correction actuator also can be the structure using messenger wire.Specifically, also can utilize and there are flexible many messenger wires the automatic focusing actuator 2 as the first holder and the outside housing 17 as the second holder are linked, be held in outside housing 17 by this messenger wire automatic focusing actuator 2.In addition, also can be configured to, many messenger wires are brazed in printed circuit board 20, suspend automatic focusing actuator 2 in midair by this messenger wire.
In addition, in the above-described embodiment, be configured to be illustrated for rectangular-shaped situation in overlooking to the yoke 7 of automatic focusing actuator 2, but the structure of yoke 7 is not limited thereto, can suitably changes.Such as, yoke 7 also can be configured to be octagon-shaped in overlooking.In this case, fix yoke and pair of magnet at least two the mutually orthogonal faces along the side that optical axis direction is arranged of yoke 7, the effect identical with the effect set forth in the above-described embodiment can be obtained thus.
Claims (8)
1. a lens driver, this lens driver possesses: the first holder, has and can keep the lens mount of phacoid and make said lens frame along the travel mechanism of optical axis direction movement; And second holder, above-mentioned first holder is remained mobile in the face orthogonal with optical axis direction the feature of said lens drive unit is freely,
In the 1 group of opposed side arranged along optical axis direction of above-mentioned first holder, be fixed with yoke, be connected with below the magnet of downside above upper magnet that the mode opposite each other with homopolarity configures by this yoke, that be used for the first magnet centering to above-mentioned first holder of first direction driving;
In 1 group of opposed side of above-mentioned first holder of the second direction orthogonal with above-mentioned first direction, be fixed with yoke, be connected with below the magnet of downside above upper magnet that the mode opposite each other with homopolarity configures by this yoke, that be used for the second magnet centering to above-mentioned first holder of above-mentioned second direction driving;
Above-mentioned second holder is fixed with annulus, this annulus with by above-mentioned first magnet to and mode between the above-mentioned upper magnet of above-mentioned second magnet centering and above-mentioned downside magnet configure;
Magnetic detecting element is configured with in the mode that the both sides of an end of the above-mentioned downside magnet of an end of the above-mentioned downside magnet with above-mentioned first magnet centering and above-mentioned second magnet centering are overlapping;
The mutually opposing magnetic pole that above-mentioned first magnet is right and the right mutually opposing magnetic pole of above-mentioned second magnet are heteropole.
2. lens driver as claimed in claim 1, is characterized in that,
Above-mentioned magnetic detecting element is respectively configured with one respectively along above-mentioned first direction and above-mentioned second direction.
3. lens driver as claimed in claim 1 or 2, is characterized in that,
The above-mentioned downside magnet of above-mentioned first magnet centering and the above-mentioned downside magnet configuration of above-mentioned second magnet centering become the face of homalographic opposed.
4. lens driver as claimed in claim 3, is characterized in that,
The above-mentioned downside magnet of above-mentioned first magnet centering and the above-mentioned downside magnet of above-mentioned second magnet centering are formed as, and at one end portion has bending part, has rectilinear form portion in the other end, are L shape in overlooking.
5. lens driver as claimed in claim 4, is characterized in that,
The above-mentioned bending part of the above-mentioned downside magnet of above-mentioned first magnet centering, parallel with the rectilinear form portion of magnet on the downside of this end face, is configured to opposed with the end face in the above-mentioned rectilinear form portion of the above-mentioned downside magnet of above-mentioned second magnet centering.
6. lens driver as claimed in claim 4, is characterized in that,
The above-mentioned bending part of the above-mentioned downside magnet of above-mentioned first magnet centering, vertical with the rectilinear form portion of magnet on the downside of this longest edge part, is configured to opposed with the lateral parts in the above-mentioned rectilinear form portion of the above-mentioned downside magnet of above-mentioned second magnet centering.
7. the lens driver according to any one of claim 1,2,4 to 6, is characterized in that,
The multiple spheroid of sandwiched between above-mentioned first holder and above-mentioned second holder, under the state making the both sides of above-mentioned spheroid and above-mentioned first holder and above-mentioned second holder abut, is held in above-mentioned second holder by above-mentioned first holder.
8. lens driver as claimed in claim 3, is characterized in that,
The multiple spheroid of sandwiched between above-mentioned first holder and above-mentioned second holder, under the state making the both sides of above-mentioned spheroid and above-mentioned first holder and above-mentioned second holder abut, is held in above-mentioned second holder by above-mentioned first holder.
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| JP2012-057434 | 2012-03-14 | ||
| JP2012057434A JP5007373B1 (en) | 2012-03-14 | 2012-03-14 | Lens drive device |
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| CN103309120B true CN103309120B (en) | 2016-02-24 |
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| KR101825731B1 (en) * | 2014-12-04 | 2018-03-23 | 에이에이씨 어쿠스틱 테크놀로지스(심천)컴퍼니 리미티드 | Camera lens module with structure for optical image stabilization |
| KR101717207B1 (en) * | 2015-01-19 | 2017-03-28 | 에이에이씨 어쿠스틱 테크놀로지스(심천)컴퍼니 리미티드 | Combined plate spring and camera lens module capable of optical image stabilization with the same |
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| SE01 | Entry into force of request for substantive examination | ||
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Address after: Tokyo, Japan, Japan Patentee after: Alpine Alpine Company Address before: Tokyo, Japan, Japan Patentee before: Alps Electric Co., Ltd. |