CN106896465A - Lens driver - Google Patents

Abstract

The present invention provides a kind of excessive movement of the lens carrier to being set in the mobile unit that is supported by messenger wire and is limited and be prevented from the lens driver for having excessive stress to the leaf spring effect of supporting lens support.Supporting member (21) is provided with the mobile unit (20) supported by messenger wire (8), the lens carrier (30) set in the inside of supporting member (21) is to be moved freely along optical axis direction by leaf spring (40,50) supporting.Limited location recess (27) is formed in supporting member (21), forming downside limiting section (27a), optical axis by spacing recess (27) intersects limiting section (27b) and rotary stopper portion (27c).And, upside limiting section (46) is formed by a part for leaf spring (40).Limitation projection (35) is provided with the part of lens carrier (30), limitation projection (35) is inserted in spacing recess (27).

Description

Lens driver

Technical field

The present invention relates to a kind of lens driver for being provided with mobile unit and lens carrier, the mobile unit is by messenger wire The direction movement that supporting and edge intersect with optical axis, the lens carrier is supported to be moved along optical axis direction in the mobile unit Move freely, the invention particularly relates to a kind of lens that can be limited the excessive movement of the lens carrier in mobile unit Drive device.

Background technology

The invention related to lens driver has been recorded in patent document 1.

In lens driver described in patent document 1, the first keeping body is provided with the inside of the second keeping body, One keeping body is provided with lens carrier.The leaf spring of upside and the leaf spring of downside, the first keeping body are fixed with the second keeping body It is to be moved freely along optical axis direction to be supported by the leaf spring in the inner side of the second keeping body.In addition, being fixed with four on substrate Line.The leaf spring of upside is fixed with the leading section of the line, the second keeping body is supported to edge and optical axis together with the first keeping body The direction movement of intersection is freely.

The first driving coil is provided with the periphery of the first keeping body, first is fixed with the fixed body fixed on substrate Driving magnet, the first driving magnet is opposed with coil with first driving.By in the first driving line The control electric current flowed in circle, the first keeping body is carried out the focal adjustments of lens along optical axis direction driving.

The second driving coil is fixed with the second keeping body, is fixed with the substrate or the fixed body and institute State the second opposed driving magnet of the second driving coil.By the control electric current moved with coil midstream in the second driving, will Second keeping body carries out the amendment of the shake of camera together with the first keeping body along the direction driving intersected with optical axis.

Citation

Patent document 1：Japanese Unexamined Patent Publication 2011-118032 publications

In this lens driver, there is anticipation when fixed the first driving coil midstream in the first keeping body is dynamic Less than larger electric current when, the first keeping body is significantly moved along optical axis direction sometimes, in addition when effect has external impact During uniform acceleration, the first keeping body also can significantly be moved along optical axis direction sometimes.Now, if not limiting the edge of the first keeping body The amount of movement of optical axis direction, then can cause excessive deformation force to act on leaf spring, so as to produce leaf spring to deform or elastic characteristic The problems such as deterioration.

However, in the lens driver described in patent document 1, being not provided with to the first holding with lens carrier The limit structure that body is limited along the situation that optical axis direction is significantly moved.

The record of Figure 12 and Figure 13 according to patent document 1, the first keeping body when the downward side shifting of the first keeping body Contacted with substrate, and the first keeping body is contacted with cover component during upward side shifting, so as to seem the upper of the first keeping body The movement in lower direction is restricted.However, substrate is located remotely from the position of the first keeping body with cover component, therefore by patent text Offer the construction shown in 1, it is difficult to not cause the amount of movement for damaging to limit the first keeping body to leaf spring.

In addition, in the lens driver, when the first keeping body and the second keeping body are along the direction intersected with optical axis When mobile, the relative position between the first keeping body and cover component with lens carrier can change, therefore now when the When one keeping body away from the direction of substrate along significantly moving, the first keeping body and cover component will not uniformly in contact with and only one Tap is touched, so as to be difficult to limit the movement upward of the first keeping body exactly.

The content of the invention

The present invention solves above-mentioned conventional problem, can be to lens carrier in mobile unit its object is to provide one kind Situation about significantly moving is limited such that it is able to prevent excessive stress in the lens driver of leaf spring.

Scheme for solving problem

The present invention relates to a kind of lens driver, it is characterised in that the lens driver has：Mobile unit, It possesses the lens carrier that can carry lenticular body；And messenger wire, mobile unit supporting is edge and optical axis on base station by it The direction movement of intersection freely, is provided with the mobile unit：Leaf spring, lens carrier supporting is along optical axis direction by it Movement is freely；And axial actuating mechanism, it makes the lens carrier be moved along the optical axis direction, is set on the upside of the base station There are the axle cross-drive mechanism for making the mobile unit be moved along the direction intersected with the optical axis, the edge in the mobile unit The optical axis direction is opposed to be provided with downside limiting section and upside limiting section, and a part for the lens carrier is located at the downside Between limiting section and the upside limiting section, so as to limit the movement along optical axis direction of the lens carrier.

In the present invention, upside limiting section is being provided with along the mobile unit side that the direction intersected with optical axis is moved by messenger wire With downside limiting section, even if so that mobile unit is moved along the direction intersected with optical axis, each limiting section also all the time with lens Support is opposed.Therefore, no matter mobile unit be in which position, can limit lens carrier along the excessive of optical axis direction It is mobile such that it is able to prevent excessive stress in leaf spring.

In lens driver of the invention, supporting member is provided with the mobile unit, the lens carrier is matched somebody with somebody Put in the inner side of the supporting member, the supporting member is linked with the lens carrier by the leaf spring, in the supporting structure Part is provided with spacing recess, and the bottom of the spacing recess constitutes the downside limiting section, set on the lens carrier Limitation projection is inserted in the spacing recess.

In lens driver of the invention, the spacing recess is to the upper opening along the optical axis, the plate A part for spring turns into the upside limiting section, and the upside limiting section is by the closure of openings of the top of the spacing recess.

In such a situation it is preferred to the pressing member not being overlapped on the leaf spring, the pressing member is pressed with described The state for pressing a part for component to be overlapped on the upside limiting section is fixed in the supporting member.

As described above, downside limiting section is formed in the spacing recess for being formed on the support members, and by a part for leaf spring It is set to upside limiting section such that it is able to set on the basis of the size of supporting member between downside limiting section and upside limiting section Opposed distance.Because lens carrier is supported by leaf spring, therefore leaf spring is located at by by upside limiting section, can be by each limit Relative position between position portion and lens carrier is set to most preferably all the time.In addition, by the pressing structure Chong Die with upside limiting section Part so that upside limiting section reliably function.

Lens driver of the invention can be set to following structure, i.e. be formed in the inner wall part of the spacing recess There is optical axis to intersect limiting section, the optical axis intersects limiting section when the lens carrier is moved along the direction intersected with optical axis for institute State limitation projection contact.

In addition, lens driver of the invention can be set to following structure, i.e. in the inner wall part of the spacing recess Rotary stopper portion is formed with, the rotary stopper portion is when the lens carrier rotates on optical axis for the limitation projection contact.

As described above, by setting spacing recess on the support members, can be formed to the multiple directions of lens carrier The limiting section that movement is limited.

Lens driver of the invention can be set to following structure, i.e. in the institute of lens carrier described in upper side bearing Stating leaf spring has：The fixed outside fixed part in the supporting member；Intersect with the optical axis from outside fixed part edge Direction extend elastic arm；And the line linking part being integrally formed with the leading section of the elastic arm, the messenger wire it is upper End links with the line linking part, and the elastic arm is configured at spaced intervals upward from the supporting member.

In this configuration, the position for closing spacing recess, energy will be fixed on as the upside limiting section of a part for leaf spring Enough making upside limiting section cannot move on spacing recess, can in advance make the elastic arm formed by same leaf spring and line linking part There is elastic deformation on the support members such that it is able to which make leaf spring has the free degree with the linking part of line.

Invention effect

Lens driver of the invention is provided with what the excessive movement of lens carrier was limited in mobile unit side Upside limiting section and downside limiting section, therefore regardless of the position of the mobile unit supported by messenger wire, can make each spacing Portion is in identical state with the relative position of lens carrier.Thus, the excessive of lens carrier can be most preferably limited all the time It is mobile such that it is able to prevent excessive stress in the leaf spring of supporting lens support.

Brief description of the drawings

Fig. 1 is the stereogram of the lens driver that embodiments of the present invention are shown from top.

Fig. 2 is the stereogram that the lens driver shown in Fig. 1 is shown in the state of unloading after lower cover.

Fig. 3 is to be decomposed into each member of formation and show to unload the exploded perspective view of the lens driver after lower cover.

Fig. 4 is the exploded perspective view for showing supporting member and the magnet for being fixed on the supporting member from below.

Fig. 5 is the partial cross-sectional top view after the lens driver shown in Fig. 2 is cut off along V-V lines.

Fig. 6 is the longitudinal section after the lens driver shown in Fig. 5 is cut off along line VI -- VI.

Fig. 7 is the top view for showing the position relationship between supporting member and lens carrier.

Fig. 8 is the expansion exploded perspective view for partly showing the relation between supporting member, leaf spring and pressing member.

Fig. 9 is the longitudinal section after lens driver is cut off along the IX-IX lines of Fig. 7.

Description of reference numerals

1 lens driver

2 covers

8 messenger wires

11 base stations

12 insulated substrates

20 mobile units

21 supporting members

22 frame portions

23 foots

23a upper surfaces

24x, 24y magnet keep recess

25x X-directions location division

25y Y-directions location division

26 datum levels

27 spacing recesses

27a downsides limiting section

27b optical axises intersect limiting section

27c rotary stoppers portion

28x, 28y magnet

28a inner sides opposed portion

28d lower surfaces

30 lens carriers

32 axle driving coils

32x, 32y magnet opposed portion

33x, 33y coil supports face

35 limitation projections

40 first leaf springs

41 segmentation spring

45 line linking parts

45a connecting holes

45b elastic arms

46 upside limiting sections

47 pressing members

47b corner sides

50 second leaf springs

60 axle cross-drive coils

O center lines

Specific embodiment

Lens driver 1 shown in Fig. 1 is equipped on portable telephone or portable information terminal dress together with capturing element Put.Although omitting in the following embodiments, but can be carried and institute on the lens carrier 30 of lens driver 1 State the opposed lenticular body of capturing element (lens barrel).Lens carrier 30 is driven along the optical axis direction of lenticular body and carries out certainly Oving foci is adjusted, and lens carrier 30 is driven along the direction intersected with optical axis and carries out hand shaking amendment in addition.

In the various figures, Z1 directions are the tops of lens driver 1, and Z2 directions are the lower sections of lens driver 1.Z1 side To be should as capturing element shoot object residing for front, Z2 directions are the rears residing for capturing element.

Fig. 1 shows the unitary construction of lens driver 1, and Fig. 2 shows to unload the lens driver 1 of the state after lower cover 2, Fig. 3 shows to be decomposed into the lens driver 1 of each major part.Respectively illustrate the center line O of lens driver 1.By thoroughly When mirror body is equipped on lens driver 1, the center line O is consistent with the optical axis of lenticular body (lens).

As shown in figure 3, lens driver 1 has base station formations 10.Synthetic resin is provided with base station formations 10 The base station 11 of system, is embedded with the metal base of the metallic plate for being divided into multiple in the base station 11.Metal base and base station 11 Method is insert-molded by so-called and integrated.Four base end parts of messenger wire 8 (bottom) are fixed with metal base, are passed through The upper end 8a of messenger wire 8 supports as that can be moved freely along with the direction (orthogonal direction) that Z axis intersect mobile unit 20.

Messenger wire 8 is formed by conductive and elastic excellent metal material, for example, formed by copper alloy.Messenger wire 8 is cutd open Face is rounded and linearly extends, a diameter of 50 μm or so, and the bearing stride that mobile unit 20 is supported on base station 11 is 3mm Left and right.

As shown in figure 3, mobile unit 20 has supporting member (movable base) 21.Supporting member 21 is by synthetic resin material Formed.

As shown in Figure 3 and Figure 4, the frame for overlooking rectangular shape (generally square) is integrally formed with supporting member 21 Portion 22 and four foots 23 extended to the lower direction (Z2 directions) along optical axis from four corners.In the downside of frame portion 22, Magnet is formed between foot 23 opposed in the X direction and foot 23 and keeps recess (magnet holding space) 24y, 24y, in Y Magnet is formed between foot 23 opposed on direction and foot 23 and keeps recess (magnet holding space) 24x, 24x.Magnet is protected Recess 24x, 24x, 24y, 24y is held to amount to located at everywhere.

As shown in figs. 4 and 5, that X-direction location division 25x and Y-direction are formed with each foot 23 everywhere is fixed Position portion 25y.In a foot 23, sides of the X-direction location division 25x and Y-direction location division 25y to be protruded from mutually orthogonal sidepiece Formula is formed.X-direction location division 25x is the plane parallel with Y-Z faces, and Y-direction location division 25y is the plane parallel with X-Z faces. In Y-direction separate and the sidepiece of opposed pairs foot 23 is respectively formed with X-direction location division 25x.Equally, Y-direction location division 25y is respectively formed in and separates and the sidepiece of opposed pairs foot 23 in the X direction.

As shown in figure 5, keeping a pair of X-direction location divisions 25x, 25x that the both sides of recess 24x are set to be located in a magnet On the same face parallel with Y-Z plane, magnet keep a pair of Y-direction location division 25y that the both sides of recess 24y set, 25y is located on the same face parallel with X-Z plane.

As shown in figure 4, being respectively equipped with a pair of datum levels 26 at the lower surface 23b towards Z2 sides of each foot 23.Base Quasi- face 26 is the front end face of the jut protruded from the downward sides of lower surface 23b.It is respectively provided with a lower surface 23b for foot 23 Two datum levels 26.The both ends for keeping recess 24x in each magnet are respectively configured with a datum level 26, are kept in each magnet The both ends of recess 24y are also respectively configured with a datum level 26.The datum level 26 be formed in supporting member 21 positioned at base station 11 The bottom of side (Z2 sides).

As shown in Fig. 3, Fig. 4, Fig. 7 and Fig. 9, limited location recess is formed in the inner side of the foot 23 located at supporting member 21 27.Amount in supporting member 21 and be formed with spacing recess 27 everywhere.(Z1 directions) is open each spacing recess 27 upward, And towards center line O (inner side) openings.As shown in Fig. 4 and Fig. 9, the bottom positioned at Z2 sides of spacing recess 27 is that downside is spacing Portion 27a, it is opposed and be that optical axis intersects limiting section along the wall that Z-direction is erected in radioactive ray direction (radial direction) with center line O 27b.In addition, centered on center line O and mutually opposing paired wall in direction of rotation (circumference) is rotary stopper portion 27c、27c。

Keep being configured with magnet 28x, 28x in recess 24x, 24x the magnet of supporting member 21 is formed at, kept in magnet Magnet 28y, 28y are configured with recess 24y, 24y.Four magnet 28x, 28x, 28y, 28y form identical plate shape (flat board Shape) and be of the same size.For each magnet, edge long the rectangular of the direction orthogonal with center line O (optical axis) Towards inner side (center line O sides), similarly, rectangular outer surface portion 28b is towards outside for the inner side opposed portion 28a of shape.It is rectangular The side long of shape is upper surface 28c (Z1 direction) upward, and lower surface 28d is downward (Z2 directions).

Each magnet 28x, 28x, 28y, 28y turns into reciprocal magnetic pole with inner side opposed portion 28a and outer surface portion 28b Mode magnetize.Such as inner side opposed portion 28a is N poles, and outer surface portion 28b is S poles.

As shown in figure 5, both ends 29x, the 29x and formation of magnet 28x, 28x by the Y-direction in inner side opposed portion 28a Abutted in the X-direction location division 25x of foot 23 and be positioned.Thereby, it is possible to equably set opposed pairs magnetic in the X direction The distance between respective inner side opposed portion 28a and center line O of iron 28x, 28x.Magnet 28y, 28y pass through inner side opposed portion Both ends 29y, 29y of X-direction in 28a are abutted and are positioned with the Y-direction location division 25y for being formed at foot 23.Thus, energy It is enough equably to set the distance between inner side opposed portion 28a and center line O of opposed pairs magnet 28y, 28y in the Y direction.

In addition, each magnet 28x, 28x, 28y, 28y protruding from lower surface 23b with its lower surface 28d and foot 23 The mode that datum level 26 turns into the same face is positioned.This can by make the lower surface 28d of magnet 28x, 28x, 28y, 28y and each Datum level 26 is connected to same datum plane and realizes.

Each magnet 28x, 28x, 28y, 28y by with X-direction location division 25x, 25x and Y-direction location division 25y, 25y Abut and be positioned, and turn into the side of the same face with the datum level 26 with the lower surface 28d of magnet 28x, 28x, 28y, 28y In the state of formula positions each magnet, each magnet is fixed with supporting member 21 by bonding agent.

In mobile unit 20, lens carrier 30 is provided with the inner side of supporting member 21.Lens carrier 30 is synthetic resin System, offers the circular retaining hole 31 of (Z-direction) insertion along the vertical direction, and be formed as tubular in central portion.For shooting Lens are kept by lens barrel, keep lensed lens barrel (lenticular body) to be assemblied in retaining hole 31.Therefore, in lens carrier 30 Retaining hole 31 is provided with the thread groove for mounted lens body.It should be noted that eliminating lens and mirror in embodiments The diagram of cylinder.

The central shaft of lens carrier 30 is consistent with the optical axis of the lens kept by lens carrier 30, and with the center line O is consistent.

As shown in Fig. 3 and Fig. 6 etc., the first leaf spring 40 is fixed with the upside of supporting member 21, in the pin of supporting member 21 The downside in portion 23 is fixed with the second leaf spring 50, is in branch by the supporting of lens carrier 30 by the first leaf spring 40 and the second leaf spring 50 Can be mobile along center line O (along optical axis) in bearing member 21.

As shown in figure 3, the first leaf spring 40 is made up of two separate segmentation spring 41,41.Each segmentation spring Portion 41 is formed by the elastic metal sheet of the electric conductivity such as copper alloy, phosphor bronze sheet.Each segmentation spring 41 is integrally formed with outer Side fixed part 42, inner side fixed part 43 and the camber of spring portion 44 for linking outside fixed part 42 and inner side fixed part 43. Outside fixed part 42 offers fixing hole 42a, and in inner side, fixed part 43 offers fixing hole 43a.

As shown in figure 8, being provided with line linking part 45 in the corner of segmentation spring 41, online linking part 45 offers connecting hole 45a.Elastic arm 45b, 45b are integrally formed between the outside fixed part 42 and line linking part 45.

As shown in figure 8, being integrally formed with fixed projection 22b in the upper surface 22a of the frame portion 22 of supporting member 21.In frame Stage portion is formed between the upper surface 22a in portion 22 and the upper surface 23a of foot 23, the upper surface 23a of foot 23 is formed in ratio The position of one-level drops to Z2 sides in the upper surface 22a of frame portion 22.

As shown in Fig. 3 and Fig. 8, in mobile unit 20, the first leaf spring 40 be fixedly arranged above it is plastic by Pressure component 47.Pressing member 47 is in the frame-shaped of quadrangle (rectangular-shaped), and is formed with the opening portion 47a of toroidal in center. Each corner of pressing member 47 offers fixing hole 48 at two respectively.

The outside fixed part 42 formed in the segmentation spring 41 of the first leaf spring 40 is arranged at the frame portion of supporting member 21 22 upper surface 22a, in outside, the top of fixed part 42 is provided with pressing member 47.The upper table from frame portion 22 of supporting member 21 The fixed projection 22b that face 22a is protruded is inserted in the fixing hole 42a formed on the outside fixed part 42 of segmentation spring 41, and Insert the fixing hole 48 of pressing member 47.The leading section of fixed projection 22b is processed or rivet hot in fixing hole 48 by cold riveting Connect processing or bonding process is fixed.As a result, the outside fixed part 42 of segmentation spring 41 is supported by component 21 with pressing structure Part 47 is gripped.

As shown in Fig. 3 and Fig. 8, fixed projection 36 is integrally formed with the top of lens carrier 30.Located at segmentation spring The inner side fixed part 43 in portion 41 is arranged on the upper surface of lens carrier 30, the insertion fixing hole 43a of fixed projection 36, and by cold Riveting processing or hot riveting processing are fixed.That is, on the top of lens carrier 30, the first leaf spring 40 (segmentation spring 41,41) with The mode that lens carrier 30 links with supporting member 21 is set.Thus, the top of lens carrier 30 is via the first leaf spring 40 Component 21 is supported by support.

As shown in figure 8, in the corner of segmentation spring 41, upside limiting section is formed with the centre of a pair of fixing hole 42a 46.As the upper surface 22a of the frame portion 22 that the outside fixed part 42 for splitting spring 41 is fixed on supporting member 21, in supporting structure The upper opening portion of the spacing recess 27 that the inner side of the foot 23 of part 21 is formed is closed by upside limiting section 46.

As shown in Fig. 3 and Fig. 7, restricted projection 35 is integrally formed in four corners of lens carrier 30.Each limitation Projection 35 is laterally (more specifically away from the direction of center line O) with radial protrusion.As shown in Fig. 7 and Fig. 9, work as lens carrier 30 be configured at supporting member 21 inside when, each limitation projection 35 is inserted in the spacing recess 27 formed in supporting member 21 It is internal.

As shown in figure 9, limitation projection 35 is downside limiting section 27a and segmentation spring 41 by the bottom of spacing recess 27 A part be upside limiting section 46 limit upper and lower movement.

When the outside fixed part 42 of the segmentation spring 41 shown in Fig. 8 is fixed on the upper surface of the frame portion 22 of supporting member 21 During 22a, elastic arm 45b, the 45b and line linking part 45 for splitting spring 41 are more outside than the corner side 47b of pressing member 47 Side protrudes.Although in addition, elastic arm 45b, 45b and line linking part 45 are positioned at the top of the upper surface 23a of foot 23, but upper table Face 23a formed must than the low one-levels of upper surface 22a of frame portion 22, therefore the upper surface 23a of elastic arm 45b, 45b and foot 23 it Between there is gap so that elastic arm 45b, 45b being capable of elastic deformations up and down.

The upper end 8a of fixed messenger wire 8 is formed through the connecting hole 45a in line linking part 45, upper end on base station 11 8a is fixed with line linking part 45 by soldering.Thus, including including supporting member 21 and pressing member 47 and lens carrier 30 Mobile unit 20 moved freely along the direction intersected with center line O on base station 11.

As shown in figure 3, the second leaf spring 50 is integrally formed by having resilient metallic plate.Second leaf spring 50 is integrally formed There are outside fixed part 51, inner side fixed part 52 and the bullet for linking the outside fixed part 51 with the inner side fixed part 52 Spring variant part 53.

The outside fixed part 51 of the second leaf spring 50 is fixed on the court everywhere in the supporting member 21 by riveting processing etc. Lower surface (towards the lower surface of Z2 sides) 23b for the foot 23 for being formed downwards, as shown in fig. 6, inner side fixed part 52 is by viscous Connect the lower surface that lens carrier 30 is fixed in agent etc..That is, the second leaf spring 50 is set to lens branch in the bottom of lens carrier 30 Frame 30 links with supporting member 21.

Lens carrier 30, can in the inner side of the supporting member 21 by lower support on the first leaf spring 40 and the second leaf spring 50 Moved up and down along the bearing of trend (optical axis directions of lens) of center line O.

As shown in Fig. 3 and Fig. 5 and Fig. 6, in the periphery of lens carrier 30, in the way of the lens carrier 30 for surrounding tubular It is wound with axle driving coil (focus coil) 32.The wire of axle driving coil 32 winds along the direction around center line O, The control electric current applied to axle driving coil 32 flows along the direction intersected with center line O.

An end of wire of axle driving coil 32 is formed by soldering and the segmentation spring of a side of the first leaf spring 40 Portion 41 is connected, and another end of wire is connected by soldering with the segmentation spring 41 of the opposing party.Then, from messenger wire 8 via Split spring 41 and apply control electric current to axle driving coil 32.

Fig. 5 shows the flat shape of axle driving coil 32.Axle driving coil 32 has：In each magnet 28x, 28x Side opposed portion 28a opposed magnet opposed portion 32x, 32x；The magnet opposed with the inner side opposed portion 28a of magnet 28y, 28y is opposed Portion 32y, 32y；And opposed with foot 23 foot's opposed portion 32a.The flat shape of axle driving coil 32 is octagonal shape.

As shown in figure 5, the lateral surface towards X-direction of lens carrier 30 is the coil branch extended parallel to Y-Z plane Bearing surface 33x, 33x, the lateral surface towards Y-direction is coil supports face 33y, the 33y extended parallel to X-Z plane.Axle drives The inside portion of magnet opposed portion 32x, 32x of coil 32 is supported with touching by described coil supports face 33x, 33x, magnet opposed portion The inside portion of 32y, 32y is supported with touching by described coil supports face 33y, 33y.It should be noted that foot opposed portion 32a Inside portion is in the state for the outer peripheral face of lens carrier 30 separate.

Also as shown in fig. 6, the lateral surface of magnet opposed portion 32x, 32x of axle driving coil 32 turns into parallel with Y-Z faces Flat part, the flat part is abreast opposed with the inner side opposed portion 28a of magnet 28x, 28x.Similarly, the magnetic of axle driving coil 32 The lateral surface of iron opposed portion 32y, 32y turns into the flat part parallel with X-Z faces, and the flat part is right with the inner side of magnet 28y, 28y The portion 28a of putting is abreast opposed.

As shown in figure 5, there is supporting member 21 X-direction location division 25x, 25x the both sides of the Y-direction of magnet 28x are entered The construction of row supporting, therefore, it is possible to make the magnet opposed portion 32x of axle driving coil 32 close to the inner side opposed portion 28a of magnet 28x. That is, compared with the dimension delta 1 that foot 23 protrudes inwardly from the both ends 29x of magnet 28x, axle driving coil 32 can be shortened It is opposed apart from δ 2 between the inner side opposed portion 28a of magnet opposed portion 32x and magnet 28x.

In addition, compared with the flat part of foot opposed portion 32a, can make the magnet opposed portion 32x's of axle driving coil 32 Flat part is formed enough to length in the Y direction such that it is able to make magnet opposed portion 32x and magnet 28x with shorter opposed apart from δ 2 and closely opposed in scope more long.In addition, the inner side opposed portion 28a of magnet 28x is abutted with X-direction location division 25x And determine the position of inner side opposed portion 28a, therefore, it is possible to accurately manage Fig. 5 with it is described opposed apart from δ 2 shown in Fig. 6.

It should be noted that opposed relationship and described magnet opposed portion between magnet opposed portion 32y and magnet 28y Opposed relationship between 32x and magnet 28x is identical.

In the present embodiment, constituted and made by magnet opposed portion 32x, 32y and magnet 28x, 28y of axle driving coil 32 The axial actuating mechanism that mirror support 30 is moved along optical axis direction.

As shown in Fig. 2 and Fig. 3 and Fig. 8, in base station formations 10, insulated substrate is fixedly arranged above in base station 11 12.Axle cross-drive coil 60 is provided with everywhere in insulated substrate 12.Therefore, axle cross-drive coil 60 is supported by base station 11. Axle cross-drive coil 60 is formed on the surface or inside of insulated substrate 12 by films such as Copper Foils.Each axle cross-drive coil 60 Turn into swirl pattern, outside electromagnetic action portion 61 and position with the position for being located remotely from center line O along elongated planar shaped In the inner side electromagnetic action portion 62 near the position of center line O.It should be noted that can also be on the surface of insulated substrate 12 (upper surface) and internal this both sides set axle cross-drive coil 60, in this case, the swirl pattern of each electric conductivity that This is connected by through hole.

When by being fixed on the messenger wire 8 of base station 11 to support mobile unit 20, as shown in Fig. 2 and Fig. 8, supporting is fixed on The respective lower surface 28d of four magnet 28x, 28x, 28y, 28y of component 21 can be with the outside of axle cross-drive coil 60 electricity The top in magnetic action portion 61 is opposed.Be made up of axle cross-drive coil 60 and magnet 28x, 28y make mobile unit 20 along with center The axle cross-drive mechanism of the direction movement that line O intersects.The axle cross-drive mechanism is configured in the upside (Z1 sides) of base station 11.

Although omitting diagram, but position detecting element is provided with insulated substrate 12.Position detecting element is Hall unit Part or magneto-resistance effect element.Position detecting element is at least provided with two, and one is opposed with the lower surface 28d of magnet 28x, another Lower surface 28d with magnet 28y is opposed.

As shown in figure 1, being provided with the cover 2 of covering mobile unit 20 in lens driver 1.Cover 2 is by nonmagnetic stainless Steel steel plate etc. is formed.Cover 2 is in cubic shaped, is integrally formed with the top board in four side plate 2a and (Z1 directions) above 2b.The window 2c for the circular for passing through light is offered on top board 2b.The lower edge of each side plate 2a with base station structure The upper surface for making the base station 11 set in portion 10 abuts, and base station 11 is fixed by bonding agent etc. with cover 2.

Next, the action to the lens driver 1 of the construction is illustrated.

In lens driver 1, each segmentation spring 41 → axle driving coil of each leaf spring 40 of messenger wire 8 → the first The both ends of 32 wire turn into independent electrical path, and control electricity is applied via the circuit passband radial axle driving coil 32 Stream.

When the axle driving coil 32 to constituting axial actuating mechanism applies control electric current, by axle driving coil 32 The electric current flowed in magnet opposed portion 32x, 32y and the magnetic field produced by magnet 28x, 28x, 28y, 28y so that lens carrier 30 Moved along center line O in mobile unit 20.Capturing element is provided with the rear (Z2 directions) of base station formations 10, by saturating The movement along center line O of mirror support 30 is aligned come the focus carried out relative to capturing element.

In addition, in axle cross-drive mechanism, when control electric current is applied to axle cross-drive coil 60, mainly by The electric current that is flowed in outside electromagnetic action portion 61 and the magnetic of outer surface portion 28b is reached from inner side opposed portion 28a in the lower section of magnet Logical, the mobile unit 20 that will be supported by messenger wire 8 drives along the direction intersected with center line O.The edge of mobile unit 20 and center line O The amount of movement in the direction of intersection detects that detection output is fed back by the position detecting element located at insulated substrate 12, from And the magnitude of current of the control electric current that control applies to axle cross-drive coil 60.Hand during by the control action to be shot Tremble amendment etc..

In the lens driver 1, as shown in figure 5, in mobile unit 20, magnet 28x passes through inner side opposed portion The both ends 29x of the length direction (direction intersected with optical axis i.e. Y-direction) of the 28a and X-direction location division 25x of supporting member 21 Abut and be positioned, the two of the length direction (direction intersected with optical axis i.e. X-direction) that magnet 28y passes through inner side opposed portion 28a End 29y is abutted and is positioned with Y-direction location division 25y.

Magnet 28x, 28y are fixed on supporting member 21 as positioning datum with inner side opposed portion 28a, even if therefore magnet There is deviation in the thickness of 28x, 28y, also will not to the magnet opposed portion 32x of each magnet 28x, 28y and axle driving coil 32, Opposed between 32y is impacted apart from δ 2.It is therefore not necessary to excessively accurately manage the thickness of magnet 28x, 28y, energy Enough reduce the manufacturing cost of magnet.

Due to that can reduce located at the distance between magnet 28x, 28x, 28y, 28y everywhere and axle driving coil 32 δ's 2 Deviation, therefore, it is possible to make from each magnet to magnet opposed portion 32x, 32x of axle driving coil 32, the driving of 32y, 32y applying Power is uniform.As a result, in mobile unit 20 lens carrier 30 will not be made exceedingly to incline, lens carrier 30 can be made with steady Fixed attitude is moved to the direction along optical axis.

Even if in addition, because of the elastic deformation in the camber of spring portion 44 of the first leaf spring 40, the camber of spring portion of the second leaf spring 50 53 elastic deformation and exist lens carrier 30 the inner side of supporting member 21 along the direction movement intersected with center line O feelings Condition, as shown in Fig. 7 and Fig. 9, it is also possible to formed with supporting member 21 by the limitation projection 35 for being formed at lens carrier 30 The optical axis of spacing recess 27 intersect limiting section 27b contact to limit the movement of the lens carrier 30.Thus lens are being driven It is opposed apart from the extreme variations of δ 2 between magnet and axle driving coil during support 30, lens can be made by axial actuating mechanism Support 30 is moved with the attitude of stabilization along optical axis direction.

As shown in figure 5, the flat part of magnet opposed portion 32x, 32y of axle driving coil 32 is with distance more long and each magnetic The inner side opposed portion 28a of iron is opposed, and can reduce opposed apart from δ 2, and the deviation apart from δ 2 is also smaller.Therefore, in axial drive In motivation structure, lens carrier 30 can be made efficiently and stably to act.

In addition, each magnet 28x, the 28y for being fixed on supporting member 21 is set with lower surface 28d with the lower surface in foot 23 The mode that the datum level 26 put turns into the same face is fixed.Lower surface 28d thereby, it is possible to equably set whole magnet is handed over axle Interval between fork driving coil 60, can be driven movable by axle cross-drive mechanism along the direction balance intersected with optical axis Unit 20.

The position of the lens carrier 30 when Fig. 6 and Fig. 9 shows that axle driving coil 32 is not powered on.When axle driving coil 32 is powered When, lens carrier 30 is moved to Z1 directions or Z2 directions, but when the movement is carried out, the limitation projection shown in design figure 9 above 35 will not contact with either one in downside limiting section 27a and upside limiting section 46.

However, flowing through improper larger current and causing lens carrier 30 to be moved along optical axis direction in working as axle driving coil 32 Move than usual distance long or when causing lens carrier 30 to be moved along optical axis direction from outside impact, limit projection 35 meetings are with downside limiting section 27a or upside limiting section 46 is contacted such that it is able to limit the excessive movement of lens carrier 30.Its knot Fruit is to be prevented from excessive deformation force to act on the first leaf spring 40 and the second leaf spring 50.

It should be noted that upside limiting section 46 is made up of a part for the first leaf spring 40, but in upside limiting section 46 Upper surface overlap with pressing member 47, even if therefore the first leaf spring 40 is relatively thin also reliably plays as the function of limiter. Accordingly it is also possible to say that pressing member 47 also constitutes a part for upside limiting section.

Also, when the larger acceleration effect in the direction intersected with center line O is in mobile unit 20, the first leaf spring 40 Camber of spring portion 44 deforms with the camber of spring portion 53 of the second leaf spring 50, lens carrier 30 mobile unit 20 inside be intended to along with When the direction that optical axis intersects significantly is moved, the limitation projection 35 located at lens carrier 30 can intersect with the optical axis of spacing recess 27 Limiting section 27b is contacted and is limited its movement.Even if prominent also by limitation in addition when lens carrier 30 is intended to be rotated around center line O 35 contacted with rotary stopper portion 27c, 27c of spacing recess 27 limit its movement.

As a result, being prevented from excessive deformation force acts on the first leaf spring 40 and the second leaf spring 50.

Because the spacing recess 27 is formed at supporting member 21, even if therefore causing to support structure because of the deformation of messenger wire 8 Part 21 is moved along the direction intersected with center line O, limitation projection 35 and each limiting section 27a, 27b located at lens carrier 30, Relative position relation between 27c, 46 will not also change.Therefore, no matter moved along the direction intersected with optical axis in supporting member 21 When still not moved when dynamic, the movement of the lens carrier 30 in mobile unit 20 all can be suitably limited all the time.

Claims (7)

1. a kind of lens driver, it is characterised in that

The lens driver has：Mobile unit, it possesses the lens carrier that can carry lenticular body；And messenger wire, its It is to be moved freely along the direction intersected with optical axis to support the mobile unit on base station,

It is provided with the mobile unit：Leaf spring, lens carrier supporting is to be moved freely along optical axis direction by it；And axial direction Drive mechanism, it makes the lens carrier be moved along the optical axis direction,

The axle cross-drive for making the mobile unit be moved along the direction intersected with the optical axis is provided with the upside of the base station Mechanism,

It is opposed to be provided with downside limiting section and upside limiting section, the lens branch along the optical axis direction in the mobile unit A part for frame be located between the downside limiting section and the upside limiting section so that limit the lens carrier along optical axis The movement in direction.

2. lens driver according to claim 1, wherein,

Supporting member is provided with the mobile unit, the lens carrier configuration is in the inner side of the supporting member, the branch Bearing member is linked with the lens carrier by the leaf spring,

Spacing recess is provided with the supporting member, the bottom of the spacing recess constitutes the downside limiting section,

The limitation projection set on the lens carrier is inserted in the spacing recess.

3. lens driver according to claim 2, wherein,

The spacing recess to the upper opening along the optical axis,

A part for the leaf spring turns into the upside limiting section, and the upside limiting section is by the opening of the top of the spacing recess Closing.

4. lens driver according to claim 3, wherein,

The pressing member being overlapped on the leaf spring is provided with, the pressing member is overlapped in institute with a part for the pressing member The state on the limiting section of upside is stated to be fixed in the supporting member.

5. the lens driver according to any one of claim 2 to 4, wherein,

Optical axis being formed with the inner wall part of the spacing recess and intersecting limiting section, the optical axis intersects limiting section in the lens branch Frame is contacted along when being moved with the direction that optical axis intersects for the limitation projection.

6. the lens driver according to any one of claim 2 to 5, wherein,

Rotary stopper portion is formed with the inner wall part of the spacing recess, the rotary stopper portion is in the lens carrier around optical axis For the limitation projection contact during rotation.

7. the lens driver according to any one of claim 2 to 6, wherein,

Have in the leaf spring of lens carrier described in upper side bearing：The fixed outside fixed part in the supporting member；From The elastic arm that the outside fixed part extends along the direction intersected with the optical axis；And with the leading section of the elastic arm integrally The line linking part that ground is formed, the upper end of the messenger wire links with the line linking part,

The elastic arm is configured at spaced intervals upward from the supporting member.