CN101135763A - Lens driving device - Google Patents
Lens driving device Download PDFInfo
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- CN101135763A CN101135763A CNA2007101468377A CN200710146837A CN101135763A CN 101135763 A CN101135763 A CN 101135763A CN A2007101468377 A CNA2007101468377 A CN A2007101468377A CN 200710146837 A CN200710146837 A CN 200710146837A CN 101135763 A CN101135763 A CN 101135763A
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Abstract
The present invention provides a lens driver with a miniaturized body. The lens driver (1) comprises: lens holding mechanisms (a lens support (6) and a lens casing (7)) for holding the lens, and a moving mechanism for making the lens holding mechanisms along moving along the light axis direction. The lens driver is characterized in that the moving mechanism is provided with a magnet (10), a coil (9) and a yoke (11), and is composed of an electromagnetic performer which works by electrifying to the coil (9). An accommodating part (16) which can accommodate one part (such as the coil (9)) of the electromagnetic performer is formed on the outside of the lens holding mechanisms.
Description
Technical field
The present invention relates to lens driver, relate in particular to a kind of auto-focus function of digital camera and lens driver of hand shake correcting function of being suitable for.
Background technology
In recent years, digital camera and band camera mobile phone develop to miniaturization, follow in this, require to be used for the also miniaturization of lens driver of camera model.Requirement corresponding to such lens driver miniaturization, for example, propose a kind of with the direction of the light shaft positive cross of lens group on the turning axle of configuration executive component, the lens driver (for example referring to Patent Document 1) of the slimming on can the optical axis direction of implement device.
Patent documentation 1: Japanese kokai publication hei 11-64705 communique
; in above-mentioned lens driver in the past; because adopt structure at the side one side configuration executive component that forms lens carrier cylindraceous; though so can realize the slimming of optical axis direction; but exist device on Width, to maximize, increased the problem of amount of the width of executive component.
Summary of the invention
The present invention proposes in view of described problem points, and purpose provides a kind of lens driver that can make the device body miniaturization.
Lens driver of the present invention, it is a kind of lens driver, possess the lens maintaining body that keeps lens and make described lens maintaining body along travel mechanism that optical axis direction moves, it is characterized in that, described travel mechanism is made of electromagnetic actuator, this electromagnetic actuator has magnet, coil and magnetic, and by described coil electricity is worked, is formed with the resettlement section of a part of accommodating described electromagnetic actuator at the lateral surface of described lens maintaining body.
According to the said lens drive unit, owing to be formed with the resettlement section of a part of accommodating electromagnetic actuator at the lateral surface of lens maintaining body, therefore can prevent that the width of device body from becoming big situation along with the width of electromagnetic actuator, so can make the device body miniaturization.In addition, because the part of electromagnetic actuator is accommodated in the resettlement section that the lateral surface at the lens maintaining body forms, so can prevent the center of device body and remain on the situation that staggers in the center of the lens on the device.
Particularly, preferably, described electromagnetic actuator comprises the magnet of annular and is wound into the coil of annular that described resettlement section has the shape corresponding shape with this magnet or coil in the said lens drive unit.Like this,, in described resettlement section, accommodate magnet or coil,, can also make the device body miniaturization simultaneously so can effectively utilize limited space because the resettlement section is designed to and has the shape corresponding shape of the magnet or the coil of toroidal.
For example, preferably, described magnet is fixed on the described lens maintaining body in the said lens drive unit, and described on the other hand coil is relative with described magnet to be disposed, and be fixed in the outside of described lens maintaining body, move on optical axis direction by make described magnet to described coil electricity.In this case, because can the lens maintaining body be moved, so can on optical axis direction, move by make the lens maintaining body to coil electricity corresponding to moving of magnet.
In addition, preferably, described coil stationary is on described lens maintaining body in the said lens drive unit, and described on the other hand magnet is relative with described coil to be disposed, and be fixed in the outside of described lens maintaining body, move on optical axis direction by make described coil to described coil electricity.In this case, because can the lens maintaining body be moved, so can on optical axis direction, move by make the lens maintaining body to coil electricity corresponding to moving of coil.
Moreover preferably, described lens maintaining body is installed on the device framework by leaf spring in the said lens drive unit.In this case, because the acting force of leaf spring usually acts on the lens maintaining body, so even in response under situation about moving on the optical axis direction, also making the lens maintaining body stable to the energising of coil.Particularly preferably be, the lens maintaining body be installed on the device framework by a plurality of leaf springs.In this case, can the lens maintaining bodies be installed, and can make the acting force that acts on the lens maintaining body become big, so can make the lens maintaining body more stable in a plurality of places.
Particularly, in the said lens drive unit preferably, by described leaf spring to described coil electricity.In this case because by leaf spring to coil electricity, so do not need to be used for distribution to coil electricity, so can make the designs simplification in the lens driver.
Moreover, in the said lens drive unit preferably, described lens maintaining body possesses lens housing, and described lens housing is taken in variform a plurality of lens along optical axis direction, and described lens housing has and the profile corresponding shape that is accommodated in the described a plurality of lens in this lens housing.In this case, because lens housing is designed to and is accommodated in the profile corresponding shape of inner a plurality of lens, need not become big in ground so can prevent the size of lens maintaining body, therefore in the camera head that is assembled with this lens maintaining body etc., can guarantee to be used to dispose the space of other members and travel mechanism etc.Consequently, can make contributions for the miniaturization of the camera head integral body after the assembling.
Particularly, in the said lens drive unit preferably, described a plurality of lens are made of first, second and the 3rd lens, described first lens be formed diameter than described second and the diameter of the 3rd lens little, and be configured to more close light inlet oral-lateral than the described second and the 3rd lens, described resettlement section is formed on the position of the light inlet oral-laterals outside, the described second and the 3rd lens of described lens housing.In this case, utilize the difference in size between first lens and the second and the 3rd lens, can guarantee to be used to dispose the space of other members such as camera head and mechanism etc.
In addition, in the said lens drive unit preferably, described lens maintaining body has lens carrier, described lens carrier is fixed the part of described electromagnetic actuator and is kept described lens housing, and described lens carrier is accommodated described lens housing from the opposition side of the face of fixing described electromagnetic actuator.In this case, owing to keep the lens housing of lens and the lens carrier of Motionless electromagnetic actuator to constitute by individual member, so can realize lens are accommodated in the operation in the lens housing and electromagnetic actuator is fixed on the high efficiency of the operation on the lens carrier, and can realize lens housing self is installed in the high efficiency of the operation on the lens carrier.
And, in the said lens drive unit preferably, by the part of the outer wall of described magnetic constituent apparatus framework.In this case, owing to can make magnetic have the function of the outer wall of device framework,, consequently can make lens driver 1 self miniaturization so can make the miniaturization of device framework.
The invention effect
According to the present invention, because on the lateral surface of lens carrier, formed the resettlement section of a part of accommodating the electromagnetic actuator that constitutes travel mechanism, the width that can prevent device body becomes corresponding to the width of travel mechanism greatly, so can make the device body miniaturization.
Description of drawings
Fig. 1 is the exploded perspective view of the lens driver that relates to of one embodiment of the present invention;
Fig. 2 is the enlarged drawing of the major part of the lens carrier that has of lens driver that above-mentioned embodiment relates to;
Fig. 3 is the exploded perspective view of the lens carrier that has of lens driver that above-mentioned embodiment relates to;
Fig. 4 is the synoptic diagram that the structure of the lens position adjustment part that forms on the lens carrier that is used for the lens driver that relates at above-mentioned embodiment is had describes;
Fig. 5 is the stereoscopic figure under the situation after lens driver that above-mentioned embodiment relates to assembles;
Fig. 6 is the vertical view under the situation after lens driver that above-mentioned embodiment relates to assembles;
Fig. 7 is the sectional view at dot-and-dash line place shown in Figure 6;
Fig. 8 is used for the mode chart that the structure of the lens that lens case that the lens driver that above-mentioned embodiment relates to is had and this shell keep describes.
Fig. 9 is the stereoscopic figure of the lens driver that relates to of the variation of above-mentioned embodiment;
Symbol description
1-lens driver; 2-imageing sensor; 3-substrate; 4-IR cut-off filter; 5-pedestal; 6-lens carrier; 61-upper surface part; 62-the first leaf spring; 63-packing ring; 64-the second leaf spring; 65-lower surface portion; 7-lens housing; 8-housing; 9-coil; 10-magnet; 11-yoke; 12-shield shell; 13-the first lens; 14-the second lens; 15-the three lens; 16-resettlement section
Embodiment
Below, be described in detail with reference to the accompanying drawings with regard to embodiments of the present invention.
Fig. 1 is the exploded perspective view of the lens driver that relates to of an embodiment of the present invention.
As shown in Figure 1, the lens driver 1 that relates to of present embodiment is constituted as and comprises: the substrate 3 of installation diagram image-position sensor 2; The pedestal 5 of IR cut-off filter 4 is installed; Lens carrier 6 is installed, and the housing 8 of lens housings 7 is installed by described lens carrier 6; Be fixed on the coil 9 on the lens carrier 6; Be configured in the magnet 10 and the yoke 11 of lens carrier 6 tops; Shield shell 12 with each member of the top of case 8.
Observe from upper side shown in Figure 1, substrate 3 is designed to square.Observe from upper side shown in Figure 1, imageing sensor 2 is designed to rectangle, and imageing sensor 2 is installed on substrate 3, makes that the long limit of imageing sensor 2 and minor face are parallel with the limit of substrate 3.In Fig. 1, expression be installation diagram image-position sensor 2 on substrate 3, make parallel with limit 3a, the 3b of the substrate 3 respectively situation of long limit 2a, minor face 2b of imageing sensor 2.
Housing 8 is for example formed by the insulative resin material, is formed with circular peristome 8a in the central.On limit, partly be formed with spigot surface 8b in substantial middle corresponding to the housing 8 of countervane 5d.At the assigned position of the upper surface of spigot surface 8b, be formed with the hooking sheet 8c of the resettlement section 12b that enters into shield shell 12 described later.In addition, near the bight of housing 8, erect and be provided with the 62d of hole portion that enters into lens carrier 6 described later (fixed part 62c described later), the pin 8d of 64d.And on the outer edge of housing 8, be formed with the resettlement section 8e of the outer edge of accommodating lens carrier 6.And, on the assigned position of resettlement section 8e, being formed with notch part 8f, described notch part 8f is used to make the notch part that passes through to the splicing ear 62f of lower side extension shown in Figure 1 from first leaf spring 62 described later.
As described later, lens carrier 6 makes up a plurality of members and constitutes.Under the state that has made up a plurality of members, in being formed at its volume inside, keep lens housing 7, make it can adjust the position up and down.Lens carrier 6 can be installed on the upper surface of housing 8 up or down.The coil 9 that fixedly has annular at the upper surface of lens carrier 6.For example, coil 9 is bonded and fixed at the upper surface of lens carrier 6.In addition, keep the maintenance method of lens housing 7 in the back explanation for the detail shape of lens carrier 6 and on lens carrier 6.
Yoke 11 is fixed on the internal face of shield shell 12 at assigned position.Yoke 11 has annular, is the shape to lower side opening shown in Figure 1.Portion forms the space within it, accommodates coil 9 and magnet 10 in this space.In addition, magnet 10 is bonded and fixed on the internal face in the described space.
At this, the structure of described lens carrier 6 is described with Fig. 2 and Fig. 3.Fig. 2 is the enlarged drawing of the major part of the lens carrier 6 that has of lens driver 1 that present embodiment relates to, and Fig. 3 is its exploded perspective view.In addition, among Fig. 2 and Fig. 3, omitted the external shell (with reference to figure 1) that keeps the member of formation of lens carrier 6.
As Fig. 2 and shown in Figure 3, lens carrier 6 combinations constitute as the lower part, that is: upper surface part 61, first leaf spring 62, packing ring 63, second leaf spring 64 and lower surface portion 65.Middle body at each member of formation is formed with peristome, as shown in Figure 2, under the state that each member of formation is combined, is formed with the space of accommodating lens housing 7 in the inside of lens carrier 6.Under the state that is kept by such lens carrier 6, the minor diameter part 7a of lens housing 7 is in the state of giving prominence to the upper side shown in this figure from the peristome of upper surface part 61.
As shown in Figure 3, upper surface part 61 have by inner wall surface thereof hide near the upper surface of large-diameter portion 7b of lens housing 7 cap 61a with from the bottom of cap 61a to the tab-like flange part 61b that becomes in device side.The upper surface of cap 61a plays a role as the upper surface of lens carrier 6 self, bonding fixed coil 9.Therefore, be formed with at the assigned position of the upper surface of cap 61a and be used for notch part 61c that an end of the inboard of coil 9 is pulled out to the outside.In addition, be formed with jut 61d on the assigned position of the outer circumferential side of the lower surface of flange part 61b, the notch part 62g of described jut 61d by first leaf spring 62 described later etc. are with the jut 65b butt of lower surface portion 65 described later.And, on the assigned position of interior all sides of the lower surface of flange part 61b, being formed with jut 61e, the notch part 62hs of described jut 61e by first leaf spring 62 described later etc. are with the jut 65c butt of lower surface portion 65 described later.
At this, the structure of the lens position adjustment part 65d that forms is described with Fig. 4 on the lower surface portion 65 of lens carrier 6.Fig. 4 is the synoptic diagram that is used to illustrate the structure of the lens position adjustment part 65d that forms on the lower surface portion 65 of lens carrier 6.And Fig. 4 is the upward view that the shell 8 of lens carrier 6 has been installed, and the state before the lens case 7 is installed in expression.
As shown in Figure 4, lens position adjustment part 65d is by constituting as the lower part: bear lens case 7 holding section 7d the 65e of the portion of bearing and can adjust the adjustment slot part 65f (with reference to Fig. 3) of the height of lens case 7 corresponding to the slippage of holding section 7d of income.In addition, by the slow dip plane of formation on adjustment slot part 65f, and constitute the height that to adjust lens case 7.Holding section 7d is packed into bear the 65e of portion after, adjust slot part 65f by making lens case 7 rotation so that holding section 7d enters, lens case 7 is installed on the lens carrier 6.
When assembling has the lens driver 1 of such structure, at first, above the substrate 3 that imageing sensor 2 has been installed, be installed with the pedestal 5 of IR cut-off filter 4.Then, lens case 7 is installed, and on housing 8, the lens carrier 6 that bonding has been fixed coil 9, this housing 8 of mounting above pedestal 5 is installed from upper side from lower side.At this moment, by the spigot surface 8b of housing 8 and the countervane 5d of pedestal 5 both are positioned.And, will be fixed on the internal face of shield shell 12 at the yoke 11 of having fixed magnet 10 that bonds on the inner peripheral surface, this shield shell 12 is covered on housing 8.At this moment, cover shield shell 12, the hooking sheet 5e of the hooking sheet 8c of housing 8 and pedestal 5 is contained in the resettlement section 12b of shield shell 12.At last, for example, assemble this lens driver 1 by shield shell 12 is bonded and fixed on housing 8 and the pedestal 5.
In the lens driver 1 that is assembled into like this, as shown in Figure 5, the spigot surface 8b of housing 8 is in the countervane 5d that enters into pedestal 5 and the state between the protuberance 5c, and hooking sheet 8c on the spigot surface 8b and the hooking sheet 5e on the countervane 5d are in the state in the resettlement section 12b that is housed in shield shell 12.And the splicing ear 62f of lens carrier 6 is in the state that the 5f of hole portion (not illustrating on Fig. 5) by the notch part 8f of housing 8 and pedestal 5 is connected with substrate 3.
In addition, in the lens driver 1 that assembles, as shown in Figure 6, the minor diameter part 7a that is in lens case 7 goes up the state that the peristome 7c that forms regards to peristome 1 2a of shield shell 12.As described later, if by circulating current in coil 9 lens carrier 6 is moved up and down, then in the inboard of the peristome 12a of shield shell 12, lens case 7 moves up and down, and the lens that are maintained on the lens case 7 move up and down too.
Below, with Fig. 7 the internal structure of the lens driver 1 that is assembled into is like this described.Fig. 7 is the sectional view at dot-and-dash line place shown in Figure 6.
As shown in Figure 7, lens case 7 is housed in the 65d of lens position adjustment part by its holding section 7d, and is maintained on the lens carrier 6.Detailed content is such as described later, three lens 13～15 that lens case 7 varies in size in the inside maintenance, and have along the shape of described lens outer shape.The cap 61 of lens carrier 6 is owing to cover on the large-diameter portion 7b of lens case 7, so form certain space at the side of the device of minor diameter part 7a.The lens driver 1 that present embodiment relates to utilizes described space as resettlement section 16, accommodates coil 9 in described resettlement section 16, and at its outside distributed magnet 10 and yoke 11.
Moreover, by described coil 9, magnet 10 and yoke 11, constitute the travel mechanism that lens carrier 6 and lens case 7 are moved.In the present embodiment, travel mechanism is made of electromagnetic actuator, specifically, is made of so-called voice coil motor.Particularly, represented to be suitable for situation in the present embodiment by the voice coil motor that makes moving-coil (moving coil) form that coil 9 moves along magnet 10 to coil 9 energisings.
At this, the structure of utilizing Fig. 8 the structure of lens case 7 to be described and to be maintained at a plurality of lens 13～15 on the lens case 7.Fig. 8 be used to illustrate lens case 7 that present embodiment relates to and the mode chart of the structure of the lens 13～15 that keep.
As shown in Figure 8, lens case 7 within it side take in three lens that form by resin material, variform i.e. first lens 13, second lens 14 and the 3rd lens 15 along optical axis direction.At this, it is littler than the diameter of second lens 14 that first lens 13 are formed diameter, is configured in the assigned position on second lens 14.In addition, it is littler than the diameter of the 3rd lens 15 that second lens 14 are formed diameter, is configured in the assigned position on the 3rd lens 15.Lens case 7 is set as along the shape of the outer shape of stacked like this first lens 13, second lens 14 and the 3rd lens 15.
In the lens driver 1 that present embodiment relates to, first lens 13 have the lens section 13a that comprises convex lens.Central portion at first lens 13 forms the bulge 13b that bloats upward, and is formed with the location division 13c of outstanding annular downwards in its outer peripheral edges portion.Moreover location division 13c is formed the part of lens section 13a, with lens section 13a same precision is arranged.
In addition, second lens 14 have the lens section 14a that comprises concavees lens.Be formed with the teat 14b of outstanding a little upward circle at the central portion of second lens 14, and be formed with the location division 14c of outstanding circular arc in its outer peripheral edges portion downwards.The central portion of teat 14b caves in a little to the lower side.In addition, the circumference of the upper surface of teat 14b plays a role as the location division 14d that engages with location division 13c.And location division 14c and location division 14d are the same with location division 13c, are formed the part of lens section 14a.
And the 3rd lens 15 have the lens section 15a that comprises non-spherical lens.Be formed with the location division 15b of outstanding upward circular arc in the outer peripheral edges portion of lens section 15a.And.Location division 15b is the same with location division 13c and location division 14c etc., is formed the part of lens section 15a.
Under situation about these first lens 13, second lens 14 and the 3rd lens 15 being accommodated in the lens case 7, as shown in Figure 8, first lens 13 are configured in the top of second lens 14, so that the location division 13c of first lens 13 is consistent with the outer peripheral face of the location division 14d of the teat 14c of second lens 14.Then, second lens 14 are configured in the top of the 3rd lens 15, so that the location division 14c of second lens 14 is consistent with the outer peripheral face of the location division 15b of the 3rd lens 15.Then, these lens are accommodated in the lens case 7, so that all faces of the 3rd lens 15 are connected to the inner peripheral surface of lens case 7.
Then, in the lens driver 1 that relates in present embodiment, the control of the situation that lens 13～15 move up and down is described with reference to Fig. 7.
In the lens driver 1 that present embodiment relates to, driving under the situation of lens 13～15, for example, in response to the driving indication from the control part of mobile phone that carries this lens driver 1 or digital camera, circulating current in coil 9.At this moment, in this lens driver 1, utilize first leaf spring 62 and second leaf spring 64 as its energising mechanism.Specifically, from substrate 3, splicing ear 62f, the wrist 62b by forming on the fixed part 62c of first leaf spring 62, circular 62a and coil brace 62e send into electric current to coil 9.Then, at the electric current that coil 9 flows, go up the splicing ear 64f that forms and be sent to substrate 3 by the coil brace 64e of second leaf spring 64, circular 64a, wrist 64b, fixed part 64c.
Electric current is flowed in coil 9, then act on mutually with the magnetic field that produces from magnet 10, produced the thrust that coil 9 is moved to above-below direction shown in Figure 7 by the electric current that flows in the coil 9.In the lens driver 1 that present embodiment relates to, control this thrust by current amount flowing in the control coil 9, coil 9 is moved up and down, it is positioned.Thus, can the lens carrier 6 of fixed coil 9 be positioned, and can the lens 13～15 that be installed in the lens housing 7 on the lens carrier 6 be positioned.
Moreover as shown in Figure 7, yoke 11 has the shape at open cross section " コ " the word shape of lower side.The bottom 11a that is configured in its inboard side face is configured to than disposing the bottom 11b weak point of the side face of side outside.Bottom 11a is configured near minor diameter part 7a of lens housing 7 and is configured in the upper face side of large-diameter portion 7b.Described bottom l1a plays a role as the limiting member of the lens carrier 6 that moves up and down corresponding to the magnitude of current.That is to say that the upper surface by described bottom 11a is connected to large-diameter portion 7b limits lens carrier 6 and moves by side to more than the certain position upward.Its result can prevent that coil 9 from colliding to yoke 11, can also prevent the breakage of coil 9 and yoke 11.
The lens driver 1 that relates to according to present embodiment like this, because be formed with the resettlement section 16 of accommodating electromagnetic actuator (voice coil motor) part as the lens carrier 6 of lens maintaining body and the lateral surface of lens housing 7, the width that can prevent device body becomes along with the width of electromagnetic actuator greatly, therefore can make the device body miniaturization.In addition, because the part of electromagnetic actuator is housed in the resettlement section 16, so the state of affairs that depart from mutually the center that can prevent device body and the center of lens 13～15 on remaining on device.
Particularly in the lens driver 1 that present embodiment relates to, electromagnetic actuator (voice coil motor) comprises the magnet 10 of annular and is rolled into the coil 9 of toroidal, resettlement section 16 is designed to and the corresponding shape of this coil 9 shapes.So,, in described resettlement section 16, accommodate coil 9,, can also make the device body miniaturization simultaneously so can effectively utilize limited space because resettlement section 16 is designed to and has the corresponding shape of shape of the coil 9 of annular.
In addition, in the lens driver 1 that present embodiment relates to, lens carrier 6 and lens housing 7 are installed on the framework of lens driver 1 by first and second leaf spring 62,64.Therefore, because the acting force of first and second leaf spring 62,64 usually acts on lens carrier 6 and lens housing 7, even, also can make lens carrier 6 and lens housing 7 stable so make them under situation about moving on the optical axis direction corresponding to energising to coil 9.
Particularly in the lens driver 1 that present embodiment relates to, switch on to coil 9 by first and second leaf spring 62,64.Thus, owing to do not need to be used for distribution, can make the designs simplification in the lens driver 1 to coil 9 energisings.
In addition, in the lens driver 1 that present embodiment relates to, lens housing 7 is designed to and is accommodated in the corresponding shape of profile of inner a plurality of lens 13～15.Therefore, need not become big in ground, so in the camera head of having assembled this lens carrier 6 etc., can guarantee to be used to dispose the space of other members and travel mechanism etc. owing to can prevent the size of lens housing 7 and lens carrier 6.
Particularly in the lens driver 1 that present embodiment relates to, it is littler than the diameter of second lens 14 and the 3rd lens 15 that first lens 13 are formed diameter, and be configured to more close light inlet oral-lateral than second lens 14 and the 3rd lens 15, resettlement section 16 be formed on the position of light inlet oral-lateral of second lens 14 in the outside of lens housing 7 and the 3rd lens 15.Thus, utilize the difference of the size between first lens 13 and second lens 14 and the 3rd lens 15, can guarantee to be used to dispose the space of other members such as camera head and mechanism etc.
And, in the lens driver 1 that present embodiment relates to, possessing the lens carrier 6 of bonding fixed coil 9 and maintenance lens housing 7, lens carrier 6 is accommodated lens housing 7 from the opposition side (lower side just shown in Figure 1) of the face of bonding fixed coil 9.So, owing to keep the lens carrier 6 of the lens housing 7 of lens 13～15 and bonding fixed coil 9 to constitute by individual member, can realize lens 13～15 are accommodated in the operation in the lens housing 7 and coil 9 is bonded and fixed at the high efficiency of the operation on the lens carrier 6, and can realize lens housing 7 is installed in self the high efficiency of the operation on the lens carrier 6.
Moreover, the invention is not restricted to above-mentioned embodiment, can carry out various enforcements more after changing.In the above-described embodiment, be not limited to illustrated in the accompanying drawings size and shape etc., in the scope that can bring into play effect of the present invention, can carry out suitable variation.In addition, as long as enforcement after changing that can be suitable in not breaking away from the object of the invention scope.
For example, in the above-described embodiment, as the travel mechanism of lens carrier 6, illustrated is to adopt the situation of coil 9 with respect to the voice coil motor of magnet 10 moving-coil forms that move, so-called that make.But the travel mechanism as lens carrier 6 is not limited to this.For example, can also be suitable for and make the voice coil motor of magnet 10 with respect to coil 9 moving magnet forms that move, so-called.Under the situation of the voice coil motor that is suitable for such moving magnet form, also can obtain the effect same with above-mentioned embodiment.
In addition, in the above-described embodiment, represented situation at the internal face tie-down yoke 11 of shield shell 12.But the structure for shield shell 12 is not limited to this, can suitably change.For example, as shown in Figure 9, the part of the outer peripheral face of yoke 11 is exposed from shield shell 12, be constituted the part of shield shell 12.In this case, owing to can make the outer peripheral face of yoke 11 have the function of shield shell 12, so can make shield shell 12 miniaturizations, its result can make lens driver 1 self miniaturization.
Claims (11)
1. a lens driver possesses the lens maintaining body that keeps lens and makes described lens maintaining body along the travel mechanism that optical axis direction moves, it is characterized in that,
Described travel mechanism is made of electromagnetic actuator, and this electromagnetic actuator has magnet, coil and magnetic, and by described coil electricity is worked,
Be formed with the resettlement section of a part of accommodating described electromagnetic actuator at the lateral surface of described lens maintaining body.
2. lens driver as claimed in claim 1 is characterized in that,
Described electromagnetic actuator comprises the magnet of annular and is wound into the coil of annular that described resettlement section has the shape corresponding shape with this magnet or coil.
3. as claim 1 or the described lens driver of claim 2, it is characterized in that,
Described magnet is fixed on the described lens maintaining body, and described on the other hand coil is relative with described magnet to be disposed, and is fixed in the outside of described lens maintaining body, moves on optical axis direction by make described magnet to described coil electricity.
4. as claim 1 or the described lens driver of claim 2, it is characterized in that,
Described coil stationary is on described lens maintaining body, and described on the other hand magnet is relative with described coil to be disposed, and is fixed in the outside of described lens maintaining body, moves on optical axis direction by make described coil to described coil electricity.
5. lens driver as claimed in claim 1 is characterized in that,
Described lens maintaining body is installed on the device framework by leaf spring.
6. lens driver as claimed in claim 5 is characterized in that,
By a plurality of described leaf springs described lens maintaining body is installed on the device framework.
7. as claim 5 or the described lens driver of claim 6, it is characterized in that,
By described leaf spring to described coil electricity.
8. lens driver as claimed in claim 1 is characterized in that,
Described lens maintaining body possesses lens housing, and described lens housing is taken in variform a plurality of lens along optical axis direction, and described lens housing has and the profile corresponding shape that is accommodated in the described a plurality of lens in this lens housing.
9. lens driver as claimed in claim 8 is characterized in that,
Described a plurality of lens are made of first, second and the 3rd lens, described first lens be formed diameter than described second and the diameter of the 3rd lens little, and be configured to more close light inlet oral-lateral than the described second and the 3rd lens, described resettlement section is formed on the position of the light inlet oral-laterals outside, the described second and the 3rd lens of described lens housing.
10. as claim 8 or the described lens driver of claim 9, it is characterized in that,
Described lens maintaining body has lens carrier, and described lens carrier is fixed the part of described electromagnetic actuator and kept described lens housing, and described lens carrier is accommodated described lens housing from the opposition side of the face of fixing described electromagnetic actuator.
11. lens driver as claimed in claim 1 is characterized in that,
Part by the outer wall of described magnetic constituent apparatus framework.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006230649A JP2008052196A (en) | 2006-08-28 | 2006-08-28 | Lens driving unit |
| JP2006-230649 | 2006-08-28 | ||
| JP2006230649 | 2006-08-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101135763A true CN101135763A (en) | 2008-03-05 |
| CN101135763B CN101135763B (en) | 2010-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101468377A Active CN101135763B (en) | 2006-08-28 | 2007-08-24 | Lens driving device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008052196A (en) |
| CN (1) | CN101135763B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741207A (en) * | 2008-11-17 | 2010-06-16 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor and method for assembling zoom lens module |
| CN101958598A (en) * | 2009-07-15 | 2011-01-26 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor assembly |
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Also Published As
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| CN101135763B (en) | 2010-06-09 |
| JP2008052196A (en) | 2008-03-06 |
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Address after: Tokyo, Japan, Japan Patentee after: Alpine Alpine Company Address before: Tokyo, Japan, Japan Patentee before: Alps Electric Co., Ltd. |