CN106896465B - Lens driver - Google Patents

Abstract

The present invention provides a kind of excessive movement to the lens carrier being arranged in the mobile unit supported by messenger wire and limits and can prevent the lens driver for having excessive stress to the leaf spring effect of supporting lens bracket.Supporting member (21) are equipped in the mobile unit (20) supported by messenger wire (8), are moved freely by leaf spring (40,50) bearing along optical axis direction in the lens carrier (30) that the inside of supporting member (21) is arranged.It is formed with limit recess portion (27) on supporting member (21), downside limiting section (27a) is formed by limit recess portion (27), optical axis intersects limiting section (27b) and rotary stopper portion (27c).Moreover, forming upside limiting section (46) by a part of leaf spring (40).It is equipped with limitation protrusion (35) in the part of lens carrier (30), limitation protrusion (35) insertion limits in recess portion (27).

Description

Lens driver

Technical field

The present invention relates to a kind of lens driver equipped with mobile unit and lens carrier, the mobile unit is by messenger wire It supports and edge is moved with the direction that optical axis intersects, the lens carrier is supported to move along optical axis direction in the mobile unit It moves freely, the invention particularly relates to a kind of lens that can be limited the excessive movement of the lens carrier in mobile unit Driving device.

Background technique

Invention relevant to lens driver is described in patent document 1.

In lens driver documented by patent document 1, it is equipped with the first keeping body in the inside of the second keeping body, the One keeping body is equipped with lens carrier.The leaf spring of upside and the leaf spring of downside, the first keeping body are fixed in the second keeping body It is moved freely by leaf spring bearing along optical axis direction in the inside of the second keeping body.In addition, being fixed with four on substrate Line.It is fixed with the leaf spring of upside in the front end of the line, the second keeping body is supported to edge and optical axis together with the first keeping body The direction of intersection moves freely.

It is equipped with the first driving coil in the periphery of the first keeping body, is fixed with first on fixed fixed body on substrate Driving magnet, first driving are opposed with the first driving coil with magnet.By in the first driving line First keeping body is driven and is carried out the focal adjustments of lens along optical axis direction by the control electric current flowed in circle.

It is fixed with the second driving coil in the second keeping body, is fixed on the substrate or the fixed body and institute State the second driving second driving magnet opposed with coil.By inciting somebody to action in the second driving control electric current flowed in coil 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 bulletin

In this lens driver, when flowing has anticipation in fixed the first driving coil in the first keeping body Less than biggish electric current when, the first keeping body is significantly moved along optical axis direction sometimes, in addition when effect has external impact When uniform acceleration, the first keeping body also can significantly move sometimes along optical axis direction.At this point, if not limiting the edge of the first keeping body The amount of movement of optical axis direction then will lead to excessive deformation force and act on leaf spring, to generate leaf spring deformation or elastic characteristic The problems such as deterioration.

However, being not provided with and being kept to first with lens carrier in the lens driver documented by patent document 1 The limit structure that body is limited along the situation that optical axis direction significantly moves.

According to the record of Figure 12 of patent document 1 and Figure 13, the first keeping body when the first keeping body moves downward It is in contact with substrate, and the first keeping body is contacted with cover component when upward side movement, to seem the upper of the first keeping body The movement in lower direction is restricted.However, substrate and cover component are located remotely from the position of the first keeping body, therefore pass through patent text Construction shown in offering 1, it is difficult to not cause the amount of movement of damage to limit the first keeping body leaf spring.

In addition, in the lens driver, when the direction that the first keeping body is intersected with the second keeping body edge with optical axis When mobile, the relative position between the first keeping body and cover component with lens carrier can change, therefore at this time when the One keeping body along when significantly being moved far from the direction of substrate, the first keeping body and cover component will not uniformly in contact with and only one Tap touching, to be difficult to accurately limit the movement of the first keeping body upwards.

Summary of the invention

The present invention solves above-mentioned previous project, and its purpose is to provide one kind can be to lens carrier in mobile unit Situation about significantly moving is limited, so as to prevent excessive stress in the lens driver of leaf spring.

Solution for solving the problem

The present invention relates to a kind of lens drivers, which is characterized in that and the lens driver includes mobile unit, It has the lens carrier that can carry lenticular body；And messenger wire, the mobile unit is supported as edge and optical axis on base station The direction of intersection moves freely, and is equipped in the mobile unit: leaf spring, by lens carrier bearing for along optical axis direction It moves freely；And axial actuating mechanism, it moves the lens carrier along the optical axis direction, is set on the upside of the base station There are the axis cross-drive mechanism for moving the mobile unit along the direction intersected with the optical axis, the edge in the mobile unit The optical axis direction is opposed to be equipped with downside limiting section and upside limiting section, and a part of the lens carrier is located at the downside Between limiting section and the upside limiting section, to limit the moving along optical axis direction of the lens carrier.

In the present invention, upside limiting section is being equipped with along the mobile unit side moved with the direction that optical axis intersects by messenger wire With downside limiting section, thus even if mobile unit along being moved with the direction that optical axis intersects, each limiting section also always with lens Bracket is opposed.Therefore, no matter which position is mobile unit be in, can limit lens carrier along the excessive of optical axis direction It is mobile, so as to prevent excessive stress in leaf spring.

In lens driver of the invention, supporting member is equipped in the mobile unit, the lens carrier is matched It sets in the inside of the supporting member, the supporting member is linked with the lens carrier by the leaf spring, in the bearing structure Part is equipped with limit recess portion, and the bottom of the limit recess portion constitutes the downside limiting section, is arranged on the lens carrier Protrusion is limited to be inserted into the limit recess portion.

In lens driver of the invention, the limit recess portion is to the upper opening along the optical axis, the plate A part of spring become the upside limiting section, the upside limiting section by it is described limit recess portion top closure of openings.

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

As described above, forming downside limiting section in the limit recess portion formed on the support members, and by a part of leaf spring It is set as upside limiting section, so as to be set between downside limiting section and upside limiting section on the basis of the size of supporting member Opposed distance.It, can be by each limit by the way that upside limiting section is set to leaf spring since lens carrier is supported by leaf spring Relative position between position portion and lens carrier is set to most preferably always.In addition, passing through the pressing structure Chong Die with upside limiting section Part, so that upside limiting section reliably functions.

Lens driver of the invention can be set as following structure, that is, be formed in the inner wall part of the limit recess portion There is optical axis to intersect limiting section, the optical axis intersects limiting section when the lens carrier edge is moved with the direction that optical axis intersects for institute State limitation protrusion contact.

In addition, lens driver of the invention can be set as following structure, that is, in the inner wall part of the limit recess portion It is formed with rotary stopper portion, the rotary stopper portion is contacted when the lens carrier rotates on optical axis for the limitation protrusion.

As described above, being capable of forming by setting limit recess portion on the support members to the multiple directions of lens carrier The mobile limiting section limited.

Lens driver of the invention can be set as following structure, that is, the institute of the lens carrier described in upper side bearing It states leaf spring and includes fixed outside fixed part in the supporting member；Intersect from the outside fixed part edge with the optical axis Direction extend elastic arm；And the line linking part being integrally formed with the front end of the elastic arm, the messenger wire it is upper End and the line linking part link, and the elastic arm configures at spaced intervals upwards from the supporting member.

In this configuration, the upside limiting section as a part of leaf spring is fixed on to the position of closing limit recess portion, energy It move upside limiting section can not on limit recess portion, the elastic arm formed by same leaf spring and line linking part can be made in advance Flexible deformation occurs on the support members, there is freedom degree with the linking part of line so as to make leaf spring.

Invention effect

Lens driver of the invention is equipped in mobile unit side and is limited the excessive movement of lens carrier Upside limiting section and downside limiting section, therefore the position regardless of the mobile unit supported by messenger wire, can make each limit Portion and the relative position of lens carrier are in identical state.The excessive of lens carrier can most preferably be limited always as a result, It is mobile, so as to prevent excessive stress in the leaf spring of supporting lens bracket.

Detailed description of the invention

Fig. 1 is the perspective view that the lens driver of embodiments of the present invention is shown from top.

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

Fig. 3 is the exploded perspective view for being decomposed into each member of formation and showing the lens driver after unloading lower cover.

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

Fig. 5 is the partial cross-sectional top view by lens driver shown in Fig. 2 after the cutting of V-V line.

Fig. 6 is the longitudinal section view by lens driver shown in fig. 5 after line VI -- VI cutting.

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

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

Fig. 9 is the longitudinal section view by lens driver after the IX-IX line cutting of Fig. 7.

Description of symbols

1 lens driver

2 covers

8 messenger wires

11 base stations

12 insulating substrates

20 mobile units

21 supporting members

22 frame portions

23 foots

The upper surface 23a

24x, 24y magnet keep recess portion

25x X-direction positioning region

25y Y-direction positioning region

26 datum levels

27 limit recess portions

Limiting section on the downside of 27a

27b optical axis intersects limiting section

27c rotary stopper portion

28x, 28y magnet

Opposed portion on the inside of 28a

The lower end surface 28d

30 lens carriers

32 axis driving coils

32x, 32y magnet opposed portion

33x, 33y coil supports face

35 limitation protrusions

40 first leaf springs

41 segmentation spring portion

45 line linking parts

45a connecting hole

45b elastic arm

46 upside limiting sections

47 pressing members

47b corner side

50 second leaf springs

60 axis cross-drive coils

O center line

Specific embodiment

Lens driver 1 shown in FIG. 1 is equipped on portable telephone or portable information terminal dress together with capturing element It sets.Although omitting in the following embodiments, can be carried on the lens carrier 30 of lens driver 1 and institute 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 in addition lens carrier 30 carries out hand shaking amendment along being driven with the direction that optical axis intersects.

In the various figures, the direction Z1 is the top of lens driver 1, and the direction Z2 is the lower section of lens driver 1.The side Z1 To be should as capturing element shoot object locating for front, the direction Z2 is rear locating for capturing element.

Fig. 1 shows the overall construction of lens driver 1, Fig. 2 shows the lens driver 1 for unloading the state after lower cover 2, Fig. 3 shows the lens driver 1 for being decomposed into each major part.Respectively illustrate the center line O of lens driver 1.Will be saturating 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 equipped in base station formations 10 The base station 11 of system is embedded with the metal base for being divided into multiple metal plates in the base station 11.Metal base and base station 11 Method integration is insert-molded by so-called.It is fixed with the base end part (lower end) of four messenger wires 8 on metal base, passes through The upper end 8a of messenger wire 8 can move freely the bearing of mobile unit 20 along the direction (orthogonal direction) intersected with Z axis.

Messenger wire 8 is formed by conductive and elastic excellent metal material, such as is formed by copper alloy.Messenger wire 8 cuts open Face is rounded and linearly extends, and diameter is 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 It is formed.

As shown in Figure 3 and Figure 4, it is integrally formed in supporting member 21 and overlooks rectangular (generally square) frame Portion 22 and four foots 23 extended from four corners to the lower direction (direction Z2) along optical axis.In the downside of frame portion 22, Magnet is formed between opposed foot 23 and foot 23 in the X direction and keeps recess portion (magnet holding space) 24y, 24y, in Y Magnet is formed on direction between opposed foot 23 and foot 23 and keeps recess portion (magnet holding space) 24x, 24x.Magnet is protected It is total set on everywhere to hold recess portion 24x, 24x, 24y, 24y.

As shown in figs. 4 and 5, it is formed with X-direction positioning region 25x on being set to each foot 23 everywhere and Y-direction is fixed Position portion 25y.In a foot 23, X-direction positioning region 25x and Y-direction positioning region 25y are with from mutually orthogonal side side outstanding Formula is formed.X-direction positioning region 25x is the plane parallel with the face Y-Z, and Y-direction positioning region 25y is the plane parallel with the face X-Z.? It is separated in Y-direction and the side of opposed pairs foot 23 is respectively formed with X-direction positioning region 25x.Equally, Y-direction positioning region 25y is respectively formed in be separated and the side of opposed pairs foot 23 in the X direction.

As shown in figure 5, keeping a pair of of X-direction positioning region 25x, 25x of the two sides setting of recess portion 24x to be located in a magnet On the same face parallel with Y-Z plane, magnet keep the two sides setting of recess portion 24y a pair of of Y-direction positioning region 25y, 25y is located on the same face parallel with X-Z plane.

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

As shown in Fig. 3, Fig. 4, Fig. 7 and Fig. 9, limit recess portion is formed in the inside for the foot 23 for being set to supporting member 21 27.Amount in supporting member 21 and is formed with limit recess portion 27 everywhere.Each limit recess portion 27 is open upward (direction Z1), And it is open towards center line O (inside).As shown in Fig. 4 and Fig. 9, the bottom positioned at the side Z2 of limit recess portion 27 is downside limit Portion 27a, with center line O in radioactive ray direction (radial direction) it is opposed and along Z-direction erect wall surface be that optical axis intersects limiting section 27b.In addition, centered on center line O and pairs of wall surface mutually opposed in direction of rotation (circumferential direction) is rotary stopper portion 27c、27c。

It keeps keeping configured with magnet 28x, 28x in magnet in recess portion 24x, 24x in the magnet for being formed in supporting member 21 Magnet 28y, 28y are configured in recess portion 24y, 24y.Four magnet 28x, 28x, 28y, 28y form identical plate shape (plate Shape) and be of the same size.For each magnet, long side is rectangular along the direction orthogonal with center line O (optical axis) The inside opposed portion 28a of shape is towards inside (side center line O), and similarly, rectangular outer surface portion 28b is towards outside.It is rectangular Upward (direction Z1), lower end surface 28d is downward (direction Z2) by the long side of shape, that is, upper surface 28c.

Each magnet 28x, 28x, 28y, 28y become reciprocal magnetic pole with inside opposed portion 28a and outer surface portion 28b Mode magnetize.Such as inside opposed portion 28a is the pole N, outer surface portion 28b is the pole S.

As shown in figure 5, both ends 29x, the 29x and formation of magnet 28x, 28x by the Y-direction in inside opposed portion 28a It abuts and is positioned in the X-direction positioning region 25x of foot 23.Thereby, it is possible to equably set opposed pairs magnetic in the X direction The distance between respective inside opposed portion 28a of iron 28x, 28x and center line O.Magnet 28y, 28y pass through inside opposed portion Both ends 29y, 29y of X-direction in 28a are abutted with the Y-direction positioning region 25y for being formed in foot 23 and are positioned.As a result, can It is enough equably to set the distance between inside 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 are with the outstanding from lower end surface 23b of its lower end surface 28d and foot 23 The mode that datum level 26 becomes the same face positions.This can by make the lower end surface 28d of magnet 28x, 28x, 28y, 28y with it is each Datum level 26 is connected to same datum plane and realizes.

Each magnet 28x, 28x, 28y, 28y by with X-direction positioning region 25x, 25x and Y-direction positioning region 25y, 25y It abuts and is positioned, and become the side of the same face with the lower end surface 28d of magnet 28x, 28x, 28y, 28y and the datum level 26 In the state that formula positions each magnet, each magnet is fixed with supporting member 21 by bonding agent.

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

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

As shown in Fig. 3 and Fig. 6 etc., it is fixed with the first leaf spring 40 in the upside of supporting member 21, in the foot of supporting member 21 The downside in portion 23 is fixed with the second leaf spring 50, and by the first leaf spring 40 and the second leaf spring 50, the bearing of lens carrier 30 is being propped up It 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 of mutually independent two segmentations spring portion 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 portion 41 is integrally formed with outer Side fixed part 42, inside fixed part 43 and the camber of spring portion 44 for linking outside fixed part 42 and inside fixed part 43.? Outside fixed part 42 offers fixation hole 42a, and in inside, fixed part 43 offers fixation hole 43a.

As shown in figure 8, being equipped with line linking part 45 in the corner of segmentation spring portion 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 level-one drops to the side Z2 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 Press component 47.Pressing member 47 is in the frame-shaped of quadrangle (rectangular-shaped), and is formed with the opening portion 47a of round in center.? Each corner of pressing member 47 offers fixation hole 48 at two respectively.

The outside fixed part 42 formed in the segmentation spring portion 41 of the first leaf spring 40 is set to the frame portion of supporting member 21 22 upper surface 22a, the top of fixed part 42 is provided with pressing member 47 on the outside.The upper table of the slave frame portion 22 of supporting member 21 22a fixed projection 22b outstanding in face is inserted in the fixation hole 42a formed on the outside fixed part 42 of segmentation spring portion 41, and It is inserted into the fixation hole 48 of pressing member 47.The front end of fixed projection 22b passes through cold riveting processing or rivet hot in fixation hole 48 It connects processing or bonding process is fixed.As a result, the outside fixed part 42 of segmentation spring portion 41 is by supporting member 21 and pressing structure Part 47 grips.

As shown in Fig. 3 and Fig. 8, fixed projection 36 is integrally formed on the top of lens carrier 30.Set on segmentation spring The inside fixed part 43 in portion 41 is arranged on the upper surface of lens carrier 30, and fixed projection 36 is inserted into fixation hole 43a, 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 portion 41,41) with The mode that lens carrier 30 links with supporting member 21 is arranged.As a result, the top of lens carrier 30 via the first leaf spring 40 and It is supported by supporting member 21.

As shown in figure 8, being formed with upside limiting section in the centre of a pair of of fixation hole 42a in the corner of segmentation spring portion 41 46.As the upper surface 22a for the frame portion 22 that the outside fixed part 42 for dividing spring portion 41 is fixed on supporting member 21, in bearing structure The upper opening portion for the limit recess portion 27 that the inside 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 protrusion 35 is integrally formed in the four corners of lens carrier 30.Each limitation Protrusion 35 outward (direction more specifically far from center line O) with radial protrusion.As shown in Fig. 7 and Fig. 9, work as lens carrier 30 when being configured at the inside of supporting member 21, and each limitation protrusion 35 is inserted in the limit recess portion 27 formed in supporting member 21 It is internal.

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

When the outside fixed part 42 of segmentation spring portion 41 shown in Fig. 8 is fixed on the upper surface of the frame portion 22 of supporting member 21 When 22a, elastic arm 45b, 45b and the line linking part 45 for dividing spring portion 41 are more outside than the corner side 47b of pressing member 47 Side is prominent.In addition, although elastic arm 45b, 45b and line linking part 45 are located at the top of the upper surface 23a of foot 23, upper table Face 23a forms to obtain level-one lower than the upper surface 22a of frame portion 22, thus elastic arm 45b, 45b and the upper surface 23a of foot 23 it Between have gap, so that elastic arm 45b, 45b being capable of upper and lower flexible deformations.

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 and line linking part 45 are fixed by soldering.As a result, including supporting member 21 and pressing member 47 and lens carrier 30 Mobile unit 20 on base station 11 along being moved freely with the direction intersected center line O.

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

The outside fixed part 51 of second leaf spring 50 is fixed on the court everywhere in the supporting member 21 by riveting processing etc. Lower end surface (towards the lower end surface of the side Z2) 23b of the foot 23 formed downwards, as shown in fig. 6, inside fixed part 52 is by gluing Connect the lower surface that lens carrier 30 is fixed in agent etc..That is, the second leaf spring 50 is set as lens branch in the lower part of lens carrier 30 Frame 30 and supporting member 21 link.

Lens carrier 30, can in the inside of the supporting member 21 by lower support on the first leaf spring 40 and the second leaf spring 50 Extending direction (optical axis directions of lens) along center line O moves up and down.

As shown in Fig. 3 and Fig. 5 and Fig. 6, in the periphery of lens carrier 30, in a manner of the lens carrier 30 for surrounding tubular It is wound with axis driving coil (focus coil) 32.The conducting wire of axis driving coil 32 is wound along the direction around center line O, The control electric current that axis driving coil 32 applies is flowed along the direction intersected with center line O.

An end for forming the conducting wire of axis driving coil 32 passes through the segmentation spring of soldering and a side of the first leaf spring 40 Portion 41 connects, another end of conducting wire is connect by soldering with the segmentation spring portion 41 of another party.Then, from messenger wire 8 via Divide spring portion 41 and applies control electric current to axis driving coil 32.

Fig. 5 shows the flat shape of axis driving coil 32.Axis driving coil 32 include in each magnet 28x, 28x Side opposed portion 28a opposed magnet opposed portion 32x, 32x；The magnet opposed with the inside opposed portion 28a of magnet 28y, 28y is opposed Portion 32y, 32y；And the foot opposed portion 32a opposed with foot 23.The flat shape of axis 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 are coil supports face 33y, the 33y extended parallel to X-Z plane.Axis driving 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 are 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 separated with the outer peripheral surface of lens carrier 30.

Also as shown in fig. 6, the lateral surface of magnet opposed portion 32x, 32x of axis driving coil 32 becomes parallel with the face Y-Z Flat part, the flat part and the inside opposed portion 28a of magnet 28x, 28x are opposed in parallel.Similarly, the magnetic of axis driving coil 32 The lateral surface of iron opposed portion 32y, 32y becomes the flat part parallel with the face X-Z, and the flat part and the inside of magnet 28y, 28y are right The portion 28a of setting is opposed in parallel.

As shown in figure 5, supporting member 21 have X-direction positioning region 25x, 25x to the both sides of the Y-direction of magnet 28x into The construction of row bearing, therefore the magnet opposed portion 32x of axis driving coil 32 can be made close to the inside opposed portion 28a of magnet 28x. That is, axis driving coil 32 can be shortened compared with the dimension delta 1 that foot 23 protrudes inwardly from the both ends 29x of magnet 28x Opposed distance δ 2 between magnet opposed portion 32x and the inside opposed portion 28a of magnet 28x.

In addition, can make the magnet opposed portion 32x's of axis driving coil 32 compared with the flat part of foot opposed portion 32a Flat part is formed in the Y direction enough to length, so as to make magnet opposed portion 32x with magnet 28x with shorter opposed distance δ 2 and closely opposed in longer range.In addition, the inside opposed portion 28a of magnet 28x is abutted with X-direction positioning region 25x And determine the position of inside opposed portion 28a, therefore can accurately manage Fig. 5 and the opposed distance δ 2 shown in fig. 6.

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

In the present embodiment, being made of magnet opposed portion 32x, 32y of axis driving coil 32 and magnet 28x, 28y makes 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, insulating substrate is fixedly arranged above in base station 11 12.It is equipped with axis cross-drive coil 60 everywhere in insulating substrate 12.Therefore, axis cross-drive coil 60 is supported by base station 11. Axis cross-drive coil 60 is formed on the surface of insulating substrate 12 or inside by films such as copper foils.Each axis cross-drive coil 60 Become swirl pattern along elongated planar shaped, there is the outside electromagnetic action portion 61 and position of the position for being located remotely from center line O In the inside electromagnetic action portion 62 of the position close to center line O.It should be noted that can also be on the surface of insulating substrate 12 Axis cross-drive coil 60 is arranged in (upper surface) and this internal both sides, in this case, the swirl pattern of each electric conductivity that This is connected by through-hole.

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

Although illustration omitted, position detecting element is equipped on insulating substrate 12.Position detecting element is Hall member Part or magneto-resistance effect element.For position detecting element at least provided with two, one is opposed with the lower end surface 28d of magnet 28x, another It is opposed with the lower end surface 28d of magnet 28y.

As shown in Figure 1, being equipped with the cover 2 of covering mobile unit 20 in lens driver 1.Cover 2 is by nonmagnetic stainless The formation such as steel steel plate.Cover 2 is in cubic shaped, is integrally formed with four side plate 2a and is located above the top plate in (direction Z1) 2b.The generally circular window 2c for penetrating light is offered on top plate 2b.The lower edge of each side plate 2a in base station structure The upper surface for making the base station 11 being arranged in portion 10 abuts, and base station 11 and cover 2 are fixed by bonding agent etc..

Next, being illustrated to the movement of the lens driver 1 of the construction.

In lens driver 1, each segmentation spring portion 41 → axis driving coil of each 8 → the first leaf spring 40 of messenger wire The both ends of 32 conducting wire become independent electrical path, apply control electricity via the circuit passband radial axle driving coil 32 Stream.

When applying control electric current to the axis driving coil 32 for constituting axial actuating mechanism, by axis driving coil 32 The electric current flowed in magnet opposed portion 32x, 32y and the magnetic field generated by magnet 28x, 28x, 28y, 28y, so that lens carrier 30 It is moved in mobile unit 20 along center line O.It is equipped with capturing element at the rear (direction Z2) of base station formations 10, by saturating The moving along center line O of mirror support 30, Lai Jinhang are aligned relative to the focus of capturing element.

In addition, in axis cross-drive mechanism, when applying control electric current to axis cross-drive coil 60, mainly by The electric current flowed in outside electromagnetic action portion 61 and the magnetic in the lower section of magnet from inside opposed portion 28a arrival outer surface portion 28b It is logical, the mobile unit 20 supported by messenger wire 8 is driven along the direction intersected with center line O.Edge and the center line O of mobile unit 20 The amount of movement in the direction of intersection is detected by being set to the position detecting element of insulating substrate 12, and detection output is fed back, from And control the magnitude of current of the control electric current applied to axis cross-drive coil 60.By the control action come hand when being shot Tremble amendment etc..

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

Magnet 28x, 28y are fixed on supporting member 21, therefore even if magnet as positioning datum using inside opposed portion 28a The thickness of 28x, 28y there are deviation, will not magnet opposed portion 32x to each magnet 28x, 28y and axis driving coil 32, Opposed distance δ 2 between 32y is impacted.It is therefore not necessary to excessively accurately manage the thickness of magnet 28x, 28y, energy Enough reduce the manufacturing cost of magnet.

It is set to the distance between magnet 28x, 28x, 28y, 28y and axis driving coil 32 everywhere δ's 2 due to that can reduce Deviation, therefore the driving applied from each magnet magnet opposed portion 32x, 32x, 32y, 32y to axis driving coil 32 can be made Power is uniform.As a result, lens carrier 30 will not be made exceedingly to tilt in mobile unit 20, lens carrier 30 can be made with steady Fixed posture is moved to along the direction of optical axis.

In addition, even if because of the flexible 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 flexible deformation and the feelings mobile in the direction that interior lateral edge and the center line O of supporting member 21 intersect there are lens carrier 30 Condition can also be formed by being formed in the limitation protrusion 35 of lens carrier 30 in supporting member 21 as shown in Fig. 7 and Fig. 9 The optical axis of limit recess portion 27 intersect limiting section 27b contact to limit the movement of the lens carrier 30.Thus in driving lens When bracket 30, opposed 2 extreme variation of distance δ between magnet and axis driving coil can make lens by axial actuating mechanism Bracket 30 is moved with stable posture along optical axis direction.

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

In addition, each magnet 28x, 28y for being fixed on supporting member 21 are set with lower end surface 28d in the lower surface of foot 23 The mode that the datum level 26 set becomes the same face is fixed.Thereby, it is possible to equably set the lower end surface 28d of whole magnet and axis to hand over The interval between driving coil 60 is pitched, can be driven by axis cross-drive mechanism along the direction balance intersected with optical axis movable Unit 20.

Fig. 6 and Fig. 9 shows the position of the lens carrier 30 when axis driving coil 32 is not powered on.When axis driving coil 32 is powered When, lens carrier 30 is mobile to the direction Z1 or the direction Z2, however when carrying out the movement, it designs and limits protrusion shown in figure 9 above 35 will not contact with either in downside limiting section 27a and upside limiting section 46.

It flows through improper larger current however, working as in axis driving coil 32 and lens carrier 30 is caused to move along optical axis direction It moves than usually long distance or when causing lens carrier 30 to move along optical axis direction from external impact, limits protrusion 35 can contact with downside limiting section 27a or upside limiting section 46, so as to limit the excessive movement of lens carrier 30.It is tied Fruit is can to prevent excessive deformation force from acting on the first leaf spring 40 and the second leaf spring 50.

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

Also, when with the biggish acceleration effect in the direction intersected center line O in mobile unit 20, the first leaf spring 40 Camber of spring portion 44 and the camber of spring portion 53 of the second leaf spring 50 deform, lens carrier 30 the inside of mobile unit 20 be intended to along with When the direction that optical axis intersects significantly is moved, the limitation protrusion 35 set on lens carrier 30 can intersect with the optical axis of limit recess portion 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 rotate around center line O 35 contact with rotary stopper portion 27c, 27c of limit recess portion 27 and limit its movement.

As a result, can prevent excessive deformation force from acting on the first leaf spring 40 and the second leaf spring 50.

Since the limit recess portion 27 is formed in supporting member 21, even if causing to support structure because of the deformation of messenger wire 8 Part 21 is moved along the direction intersected with center line O, set on lens carrier 30 limitation protrusion 35 and each limiting section 27a, 27b, Relative positional relationship between 27c, 46 will not change.Therefore, no matter moved in supporting member 21 along the direction intersected with optical axis When still not moving when dynamic, the movement of the lens carrier 30 in mobile unit 20 all can be suitably limited always.

Claims (5)

1. a kind of lens driver, which is characterized in that

The lens driver includes mobile unit, has the lens carrier that can carry lenticular body；And messenger wire, Mobile unit bearing is moved freely for edge with the direction that optical axis intersects on base station,

Be equipped in the mobile unit: leaf spring moves freely lens carrier bearing along optical axis direction；And axial direction Driving mechanism moves the lens carrier along the optical axis direction,

The axis cross-drive for moving the mobile unit along the direction intersected with the optical axis is equipped in the upside of the base station Mechanism,

It is opposed to be equipped with downside limiting section and upside limiting section, the lens branch along the optical axis direction in the mobile unit A part of frame between the downside limiting section and the upside limiting section, thus limit the lens carrier along optical axis The movement in direction,

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

Limit recess portion is equipped in the supporting member, the bottom of the limit recess portion constitutes the downside limiting section,

The limitation protrusion being arranged on the lens carrier is inserted into the limit recess portion,

The limit recess portion to the upper opening along the optical axis,

A part of the leaf spring become the upside limiting section, the upside limiting section by it is described limit recess portion top opening Closing.

2. lens driver according to claim 1, wherein

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

3. lens driver according to claim 1 or 2, wherein

Optical axis is formed in the inner wall part of the limit recess portion and intersects limiting section, and the optical axis intersects limiting section in the lens branch Frame is contacted along when moving with the direction that optical axis intersects for the limitation protrusion.

4. lens driver according to claim 1 or 2, wherein

It is formed with rotary stopper portion in the inner wall part of the limit recess portion, the rotary stopper portion is in the lens carrier around optical axis It is contacted when rotation for the limitation protrusion.

5. lens driver according to claim 1 or 2, wherein

The leaf spring of the lens carrier described in upper side bearing includes 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 the front end one with the elastic arm The line linking part that ground is formed, the upper end of the messenger wire and the line linking part link,

The elastic arm configures at spaced intervals upwards from the supporting member.