CN101587220A - Lens driver - Google Patents
Lens driver Download PDFInfo
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- CN101587220A CN101587220A CNA2009101389548A CN200910138954A CN101587220A CN 101587220 A CN101587220 A CN 101587220A CN A2009101389548 A CNA2009101389548 A CN A2009101389548A CN 200910138954 A CN200910138954 A CN 200910138954A CN 101587220 A CN101587220 A CN 101587220A
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- mount
- driver
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- 230000003287 optical effect Effects 0.000 claims abstract description 90
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000005465 channeling Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000007767 bonding agent Substances 0.000 description 17
- 230000014509 gene expression Effects 0.000 description 15
- 230000004075 alteration Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
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Abstract
The invention provides a lens driver mounted on an optical part, comprising a leading screw rotating by utilizing the rotating of a motor, a lens carrier reciprocating along the a rotational axis leading screw by utilizing the rotating of the leading screw, a leading axle extending in parallel to the rotational axis and penetrating the lens carrier and guiding the lens carrier, and a lens mounted on the free end of the lens carrier in the cantilevering state. Thereby, in the lens driver, a part of frame part for forming the lens carrier is removed around the lens, thus the lens face can be big as far as possible.
Description
Technical field
The present invention relates to a kind of optic (for example light mechanism for picking of the shoot part of portable terminal or optical disc apparatus) that is installed on, be used for the lens driver of the spherical aberration compensation of the focusing of lens or lens.
Background technology
The light of being put down in writing in TOHKEMY 2006-114117 communique picks up in (pick up) device, lens driver with the spherical aberration compensation that is used for lens, lens driver meshes with the tooth-strip part that is arranged on the moving lens frame by the worm gear by the motor rotation, thereby lens mount is advanced and retreat along optical axis direction.This lens mount is provided with circular peristome, and lens are fixed in this peristome.
But, at the frame section that has a part that becomes lens mount on every side that is arranged at the peristome on the lens mount, therefore have to reduce accordingly corresponding to this frame section size of lens, and in contrast requires lens face big as far as possible on the characteristic of lens.In the past, be difficult to solve conflicting like this problem.
Summary of the invention
The object of the present invention is to provide a kind of lens driver, the frame section of removing a part that constitutes lens mount on every side from lens can make lens face big as far as possible.
The present invention is mounted in the lens driver on the optic, it is characterized in that, has: lead screw (lead screw), and its rotation by motor is rotated; Lens mount, it is by the rotation of described lead screw, moves back and forth along the rotation of described lead screw; Leading axle, itself and rotation extend abreast, and connect lens mount and to the lens mount channeling conduct; Lens, it remains on the free end of lens mount with cantilever position.
The lens that are applicable to this lens driver are maintained on the lens mount with cantilever position, and therefore, the frame section of a not pattern of wants lens mount part can make the lens face of lens big as far as possible thus around lens.
And then, in the present invention,, lens and lens mount have been carried out all designs for lens are remained on the lens mount with cantilever position.At first, lens have jut, and this jut is outstanding towards the direction perpendicular to the optical axis of lens from the outer peripheral face of lens.Thus, can easily and reliably lens be remained on the lens mount with cantilever position.
In addition, have first pair of top, this first pair of top is positioned on the described outer peripheral face of described lens of cardinal extremity one side of described jut.Relatively, lens mount has: the ccontaining recess of projection, and it is used for ccontaining described jut from the described free end depression of described lens mount; First abutting part, it is positioned at described free end one side, is used for connecting with described first pair of top.Thus, can lens be assembled on the lens mount easily and reliably by simple structure.
In addition, to form with the optical axis be the circular arc at center at preferred first pair of top.
When assembling lens on lens mount, when the jut with lens is inserted in the ccontaining recess of projection of lens mount, first pair of top of lens and the first abutting part butt of lens mount.At this moment, to form with the optical axis be the circular arc at center at first pair of top.Therefore, even have the gap between wall that forms the ccontaining recess of projection and jut, jut is to move in the center with the optical axis in the ccontaining recess of projection only also, therefore, the position of the optical axis of lens can not be offset, can be simply and accurately with entirety of lens package to lens mount.
In addition, preferably be formed with second pair of top of on plane, extending on the jut of lens perpendicular to optical axis, and first wall that forms the ccontaining recess of projection is second abutting part, described second abutting part extends on the plane perpendicular to the axis of leading axle, is used for and second pair of top butt.
In this case, by second pair of top of lens being pushed on second abutting part (first wall) that is connected to the ccontaining recess of projection, lens are located on optical axis direction with respect to lens mount, be assembled on the lens mount with can preventing lens tilt, and can be simpler and accurately with entirety of lens package to lens mount.
In addition, second wall that is preferably formed the ccontaining recess of projection is a protrusions limit portion, and described protrusions limit portion is that the rotation at center limits with the optical axis to jut.
In the ccontaining recess of projection, jut is limited according to the mode that with the optical axis is central motion, the protrusions limit portion (second wall) that forms the ccontaining recess of projection can limit the rotation of jut reliably, therefore, can improve the operability of assembling lens on lens mount.
In addition, preferred lens is the I font lens (I cut lens) that are cut into the I font, and described I font lens have first and second cut surface that is parallel to each other on outer peripheral face, and the projected direction of first and second cut surface and jut extends abreast.
By utilizing such I font lens, lens face is increased, and make lens driver realize slimming.
In addition, preferably any one in the free end of outside surface of described lens (or above-mentioned jut) and described lens mount is provided with: to another outstanding register pin arbitrarily; Towards described arbitrarily another outstanding and with the outstanding abreast spline pin of described register pin; Described another is provided with arbitrarily: the pilot hole that is used to insert described register pin; Observe the spline hole of upwards extending and being used to insert described spline pin from the center of described pilot hole in the footpath of pilot hole.
When assembling lens on lens mount, be inserted into by register pin in the pilot hole of lens mount lens, make the location of lens on lens mount become simple.Only by this register pin, lens can be that rotate at the center with the register pin on lens mount, therefore, by the spline pin is inserted in the spline hole, can determine the position of the optical axis of lens, wherein, described spline hole is to observe in the footpath of pilot hole from the center of pilot hole upwards to extend.And, because the spline hole shape is become slotted hole, can make the dimensional tolerence between register pin and the spline pin become big, therefore,, also be easy to the manufacturing of lens even register pin and spline pin are the following little members of 1mm.And then, the spline hole shape is become slotted hole, the influx of bonding agent is increased, thereby lens can be securely fixed on the lens mount.Therefore, can make lens be difficult to come off, thereby improve the resistance to impact of lens driver.
In addition,, and pilot hole and spline hole are set on lens on lens mount, also can play action effect same as described above even register pin and spline pin are set.
In addition, the optical axis of preferred orientation pin and spline pin and lens extends abreast, and be formed on extend perpendicular to the optical axis of lens on the end face, pilot hole and spline hole are formed on the quilt that extends perpendicular to the optical axis of lens on the end face.
To the lens mount assembling lens time, therefore end face is pushed up end face is relative with quilt on the lens mount on the lens, can locate lens simple and reliablely on the bearing of trend of optical axis.And then, inserting bonding agent, lens can be securely fixed on the lens mount thus to end face and by between to end face.Therefore, can make lens more be difficult to come off, thereby improve the resistance to impact of lens driver.
In addition, preferred orientation pin and spline pin are to extend on the tangential direction of circle at center at the optical axis with lens, and be formed on that optical axis with lens extends abreast on the end face, pilot hole and spline hole are formed on quilt that the optical axis with lens extends abreast on the end face.
When the lens mount assembling lens, make end face is pushed up end face is relative with quilt on the lens mount on the lens, therefore, can lens be located on the bearing of trend of register pin and spline pin simple and reliablely.And then, by inserting bonding agent, lens can be securely fixed on the lens mount to end face and by between to end face.Therefore, can make lens more be difficult to come off, thereby improve the resistance to impact of lens driver.
According to the present invention, around lens, removed the frame section that constitutes a lens mount part, can make lens face big as much as possible.
Description of drawings
Fig. 1 is the stereographic map of an embodiment of expression lens driver of the present invention.
Fig. 2 is a stereographic map of observing lens driver from other angle.
Fig. 3 is the front view of lens driver.
Fig. 4 is the rear view of lens driver.
Fig. 5 is the cut-open view of the engagement state of expression lens and lens mount.
Fig. 6 is the cut-open view of the engagement state of expression lens and lens mount.
Fig. 7 is the partial enlarged drawing of major part of the engagement state of expression lens and lens mount.
Fig. 8 is the stereographic map of second embodiment of expression lens driver of the present invention.
Fig. 9 is the stereographic map of the major part of expression lens driver shown in Figure 8.
Figure 10 is the stereographic map of the 3rd embodiment of expression lens driver of the present invention.
Figure 11 is the stereographic map of the major part of the lens driver shown in expression Figure 10.
Figure 12 is the free-ended vertical view of expression lens mount.
Figure 13 is the stereographic map of the 4th embodiment of expression lens driver of the present invention.
Figure 14 is the stereographic map of expression optical take-up apparatus of the present invention.
Figure 15 is the stereographic map of expression optical disc apparatus of the present invention.
Embodiment
Preferred implementation to lens driver of the present invention is described in detail with reference to the accompanying drawings.
[first embodiment]
In the light mechanism for picking (optic) of optical disc apparatus inside, light beam need be converged on the Information Level of CD exactly.Therefore, in high-precision smooth mechanism for picking,, need make lens along the optical axis direction fine motion in order can the spherical aberration that thickness error produced of the protection (cover) of CD layer to be compensated.
As Fig. 1～shown in Figure 4, be installed in the spherical aberration compensation that lens driver 1 on the light mechanism for picking (optic) is used for lens, and has the base component 2 that is " コ " font, described base component 2 has 2 support body 2a, 2b and the base plate 2c that is parallel to each other, in order to realize blocking, on this base component 2, assembling each following parts.
This lead screw 4 connects the lens mount 8 of arm shape, and is screwed onto in the internal thread part 7, and lens mount 8 is pressed against on the internal thread part 7 by spring force always.Lens mount 8 has from the outstanding laterally part 8A of base component 2, and this outshot 8A extends on the direction identical with the bearing of trend of support body 2a, 2b, and is bent into " ㄑ " font (with reference to Fig. 3).And, utilize bonding agent that pickup lens 9 is fixed on free end 8e one side of lens mount 8, these lens 9 are configured in the outside of base component 2.
Be fixed with leading axle 10 on base component 2, this leading axle 10 is parallel to the rotation L of lead screw 4 and extends, and support body 2a and support body 2b frame are joined.This leading axle 10 is inserted in the bullport 8b that leads on being formed on lens mount 8.Therefore, carry out forward and reverse rotation, lens mount 8 is correctly moved back and forth along the axis P of leading axle 10 by making lead screw 4, follow in this, in the axis P of leading axle 10 mode parallel with the optical axis R of lens 9, lens 9 also correctly carry out rectilinear motion.
Dispose compression helical spring 11 in base component 2, described compression helical spring 11 is used on the bearing of trend of rotation L lens mount 8 application of forces, this compression helical spring 11 be wound on leading axle 10 around.One end of this compression helical spring 11 is fixed on the support body 2a, and the other end of this compression helical spring 11 is fixed on from the end of the 8d of foot that is the L font of lens mount 8 prolongations.In addition, leading axle 10 connects the 8d of foot and extends.
Acting force by compression helical spring 11, can be with lens mount 8 always by being pressed on the internal thread part 7, and then this acting force also is applied on the internal thread part 7, therefore, internal thread part 7 and lead screw 4 are screwed togather reliably, thereby realize the raising of the feed accuracy of lens mount 8.
And, on base component 2, being fixed with spline axle 12, described spline axle 12 has the axis S that the axis P with the rotation L of lead screw 4 and leading axle 10 extends abreast, and this spline axle 12 joins support body 2a and support body 2b frame.This spline axle 12 is inserted in the notch 8c of formed U font on the end of lens mount 8, and restriction lens mount 8 is that rotate at the center with the rotation L of lead screw 4.
As Fig. 1, Fig. 5 and shown in Figure 6, lens 9 use the I font lens that are cut into the I font, and these I font lens have first and second cut surfaces 21,22 that are parallel to each other on outer peripheral face 9a.These lens 9 on lens mount 8, and are in the cantilever support state by adhesive securement on lens mount 8, therefore, needn't be provided as the frame section of lens mount 8 parts around lens, can make the lens face 9b of lens 9 big as much as possible thus.
The lens 9 that are used for spherical aberration compensation are very little, and the width between the cut surface 21,22 is 4mm, and the diameter that is positioned at the arc sections of cut surface 21,22 both sides is 5mm.Therefore, need be that unit improves with the millimeter, so that profile diminishes and make lens face 9b become big.
The lens mount 8 that is used for fixing lens 9 has: the ccontaining recess 26 of projection, its free end 8e from lens mount 8 begin depression, are used for ccontaining jut 23; First abutting part 27, it is positioned at free end 8e one side, and with first pair of top 24 butt.This first abutting part 27 is set up in parallel with the ccontaining recess 26 of projection on optical axis R direction, and forms the arc surface identical with first pair of top 24.Thus, by simple structure, can easily and reliably lens 9 be assembled in lens mount 8.
When utilizing anchor clamps to lens mount 8 assembling lens 9, when the jut 23 with lens 9 is inserted in the ccontaining recess 26 of projection of lens mount 8, the first pair of top 24 of lens 9 and first abutting part, 27 butts of lens mount 8.At this moment, to form with optical axis R be the arc surface at center at first pair of top 24.Therefore, even between wall 26b that forms the ccontaining recess 26 of projection and jut 23, have gap K (with reference to Fig. 7), jut 23 is to move in the center with optical axis R only also in the ccontaining recess 26 of projection, therefore, the position of the optical axis R of lens 9 can not be offset, and lens 9 simply and accurately can be assembled on the lens mount 8.
And, on the jut 23 of lens 9, being formed with second pair of top 28, extend on the plane perpendicular to optical axis R at described second pair of top 28.Relatively, the first wall 26a that forms the ccontaining recess 26 of projection is second abutting part, and described second abutting part extends on the plane perpendicular to the axis P of leading axle 10, and with second pair of top 28 butt.
When the jut 23 with lens 9 is inserted in the ccontaining recess 26 of projection of lens mount 8, second pair of top 28 of lens 9 pushed on second abutting part (first wall) 26a that is connected to the ccontaining recess 26 of projection, thus, on the lens mount 8 lens 9 are being carried out location on optical axis R direction, can prevent that also lens 9 are fixed on the lens mount 8 obliquely, and, lens 9 more simply and accurately can be assembled on the lens mount 8.
And as Fig. 1, Fig. 3 and shown in Figure 7, the second wall 26b that forms the ccontaining recess 26 of projection is a protrusions limit portion, and described protrusions limit portion is parallel to each other, and to be used to limit jut 23 be that rotate at the center with optical axis R.Be easy to gap K even between the second wall 26b and jut 23, exist the operation be used to make lens 9 be assembled in lens mount 8 to become, also can limit jut 23 by the 26b of protrusions limit portion (second wall) that is parallel to each other reliably is that rotate at the center with optical axis R, therefore, can improve the operability that lens 9 are assembled in lens mount 8.
Described lens 9 are the I font lens that have first and second cut surface 21,22 that is parallel to each other on outer peripheral face 9a, and first and second cut surface 21,22 is parallel with the projected direction of jut 23 and extend.By utilizing such I font lens, can make lens face 9b become big, and lens 9 are contained in the thickness of lens driver 1 (with reference to Fig. 3).
And though also can lens 9 be fixed on the lens mount 8 by being pressed into, being pressed into the position may fluff because of temperature variation, in addition, also can utilize hot riveting, but may impact plastic lens 9 when heating.Thereby the bonding agent by being coated with on the wall that forms the ccontaining recess 26 of projection or first abutting part 27 is fixed on lens 9 on the lens mount 8.
And on this lens mount 8, the bonding agent that is provided with the semicircle shape that is connected with the ccontaining recess 26 of projection accumulates recess 29, can make remaining bonding agent flow into bonding agent and accumulate in the recess 29.
The present invention is not limited to above-mentioned embodiment certainly.For example, also lens driver 1 can be installed on the optic (for example shoot part of portable terminal), be used for the focusing of lens or the spherical aberration compensation of lens.In addition, lens 9 also can be common round lens.And any in the first pair of top 24 and first abutting part 27 can form the circular shape of wire.In addition, for the first pair of top 24 and first abutting part 27, can not face contact, but form the form that contact point is positioned at two sides of jut 23 as the arc surface.
[second embodiment]
In the lens driver 1 of this embodiment, to the component part mark identical Reference numeral identical with described first embodiment, and the repetitive description thereof will be omitted.In addition, lens are marked Reference numeral 108, and lens mount mark Reference numeral 109 is carried out following explanation.
Fig. 8 is the stereographic map of second embodiment of expression lens driver of the present invention.Base component 2 in second embodiment have with first embodiment in base component 2 essentially identical structures, still, have difference as described below.In second embodiment, compression helical spring 11 be wound on spline axle 12 around.In addition, be formed with the hole portion that is used for inserting logical spline axle 12 in the end of lens mount 108, spline axle 12 connects compression helical spring 11 in compression helical spring 11 the mode between support body 2a and the lens mount 108 of being configured in and is fixed on the base component 2.
The lens 109 that are used for spherical aberration compensation are very little, and the width between the cut surface 121,122 is 4mm, and the total length of cut surface 121,122 on bearing of trend is 5～6mm.Therefore, need be that unit improves with the millimeter, so that lens-shape diminishes and make lens face 109b become big.
As shown in Figure 9, lens 109 have: columned register pin 123, and its outside surface 109a from lens 109 is outstanding; Columned spline pin 124, its outside surface 109a from lens 109 is outstanding, and outstanding abreast with register pin 123.With respect to this, lens mount 108 has: the pilot hole 126 of toroidal, and it is arranged on the free end 108e of lens mount 108, and the diameter of diameter and register pin 123 is roughly the same, is used to make register pin 123 to insert; The spline hole 127 of slotted hole shape, its center from pilot hole 126 is observed in the footpath of pilot hole 126 and is upwards extended, and the diameter of minor axis width and spline pin 124 is used to make spline pin 124 to insert about equally.
To lens mount 108 assembling lens 109 time, be inserted into by register pin 123 in the pilot hole 126 of lens mount 108 lens 109, make the location of lens 109 on lens mount 108 become simple.Only by this register pin 123, lens 109 are that the center is rotated with register pin 123 on lens mount 108, therefore, observe upwardly extending spline hole, the footpath of pilot hole 126 127 by spline pin 124 being inserted into, can determine the position of the optical axis R of lens 109 thus from the center of pilot hole 126.
And, because spline hole 127 forms slotted hole, can make the dimensional tolerence between register pin 123 and the spline pin 124 big, therefore,, also be easy to the manufacturing of lens 109 even register pin 123 and spline pin 124 are little below 1mm.And then, because spline hole 127 forms slotted hole, can make the inflow quantitative change of bonding agent many thus, and lens 109 can be securely fixed on the lens mount 108.Therefore, lens 109 are difficult to come off, and can improve the resistance to impact of lens driver 1.
And register pin 123 and spline pin 124 extends abreast with the optical axis R of lens 109, and be formed on extend perpendicular to the optical axis R of lens 109 on the end face 128.This is arranged on the outside surface 109a end face 128, and is positioned at the below of lens face 109b, and as bonding plane.
To lens mount 108 assembling lens 109 time, make lens 109 1 sides to the quilt of end face 128 and lens mount 108 1 sides to end face 129 relative tops, therefore, can lens 109 be located on the bearing of trend of optical axis R simple and reliablely.And then, by inserting bonding agent, lens 109 are securely fixed on the lens mount 108 to end face 128 and by between to end face 129.Therefore, lens 109 more are difficult to come off, thereby can improve the resistance to impact of lens driver 1.
And the end of jut 130 1 sides of lens body 109A is provided with the cutting part 109c that is connected with jut 130, this cutting part 109c and dip plane 132 butts, and described dip plane 132 is connected with the wall of the ccontaining recess 131 of projection.Thus, be easy to lens 109 are assembled on the lens mount 108.
And the bonding agent that this lens mount 108 is provided with the semicircle shape that is connected with the ccontaining recess 131 of projection accumulates recess 133, can make remaining bonding agent flow into bonding agent and accumulate in the recess 133.
[the 3rd embodiment]
In the lens driver 1A of this embodiment, to the component part mark identical Reference numeral identical with described second embodiment, and the repetitive description thereof will be omitted.In addition, to lens mark Reference numeral 40, lens mount mark Reference numeral 50 is carried out following explanation.
As Figure 10 and shown in Figure 11, the register pin 43 and the spline pin 44 that on lens 40, are suitable for cut surface 41,42, the tangential direction that at the optical axis R with lens 40 is the circle at center is promptly extended on the direction perpendicular to the optical axis R of lens 40, and be formed on the top 45, described parallel with the optical axis R of lens 40 and extend to top 45.Relatively, be applicable to that the pilot hole 51 of lens mount 50 and spline hole 52 are formed on by on the end face 53, described by parallel with the optical axis R of lens 40 and extend (with reference to Figure 12) to end face 53.
In addition, the jut of Reference numeral 46 expression lens 40, Reference numeral 40a represents the outside surface of lens 40, and Reference numeral 40b represents lens surface, and Reference numeral 50e represents the free end of lens mount 50.
To lens mount 50 assembling lens 40 time, make lens 40 1 sides to the quilt of end face 45 and lens mount 50 1 sides to 53 pairs of tops of end face, therefore, can lens 40 be located on the bearing of trend of register pin 43 and spline pin 44 simple and reliablely.And, by inserting bonding agent, lens 40 are securely fixed on the lens mount 50 to end face 45 and by between to end face 53.Therefore, lens 40 more are difficult to come off, thereby can improve the resistance to impact of lens driver 1A.
And, around to end face 53, be formed with the vertical wall 54 that is the コ font.The wall of this vertical wall 54 as bonding plane, can be realized the extension of bonding plane thus, lens 40 are securely fixed on the lens mount 50 more.Therefore, lens 40 more are difficult to come off, thereby can improve the resistance to impact of lens driver 1A.
And, on this lens mount 50, accumulate recess 55 at the bonding agent that is provided with semicircle shape by substantial middle to end face 53, can make remaining bonding agent flow into bonding agent and accumulate in the recess 55.
The present invention is not limited to described embodiment certainly.For example, as shown in figure 13, in the lens driver 1B of other embodiment, pilot hole 71 and spline hole 72 are formed on quilt that the optical axis R with lens 60 extends abreast on the end face 73, described pilot hole 71 and spline hole 72 are used to be inserted in register pin 63 and the spline pin 64 that is suitable on the lens 60 with cut surface 61,62, and adjacent and be formed with linearly vertical wall 74 to top 73 with this quilt.By with the wall of this vertical wall 74 as bonding plane, can realize the extension of bonding plane, and can reduce the size of the free end 70e of lens mount 70.At this, Reference numeral 65 expressions are to end face, and Reference numeral 66 is represented juts.
In addition, in order to realize the lightweight and the miniaturization of lens mount 50,70, vertical wall 54,74 can be set.
In addition, lens driver 1,1A, 1B can be installed on the optic (for example shoot part of portable terminal), are used for the focusing of lens or the spherical aberration compensation of lens.In addition, lens 109,40,60 also can be common round lens.
In addition, register pin and spline pin are set on lens mount 108,50,70, and on lens 109,40,60, pilot hole and spline hole are set, also can play the action effect identical with above-mentioned embodiment.
More than, the embodiment of lens driver of the present invention has been carried out all explanations, form optical take-up apparatus 200 or optical disc apparatus 200 but also can load described lens driver 1.
Optical take-up apparatus 200 is used for the information that is recorded in normal optical disk (CD:Compact Disc), multifunctional digital code CD (DVD:Digital Versatile Disc), Blu-ray Disc (Japan registration trade mark No. 5084442, No. 4622587) (BD:Blu-ray Disc) is read and write (R/W).As shown in figure 14, optical take-up apparatus 200 has: red laser diode (laser diode) 201, and it is used to be created in CD or DVD goes up employed red light; Blue laser diode 202, it is used to be created in BD and goes up employed blue light; And have photo detector 203, it is used to receive above-mentioned red light and blue light.And the outside surface of optical take-up apparatus 200 is provided with CD/DVD object lens 204 and BD object lens 205, and wherein, described CD/DVD object lens 204 are used to make red light to focus on CD/DVD, and described BD object lens 205 are used to make blue light to focus on BD.
And, for the spherical aberration to described object lens 204,205 compensates, on optical take-up apparatus 200, loading with the lens driver 1 of lens 9,109,40,60, lens 9,109,40,60 on the lens driver 1 are being moved along optical axis R direction carry out spherical aberration compensation as collimation lens (collimator lens).
Below, the light path of red light is described.Make the red light of sending from red laser diode 201 by optical splitter (beam splitter) 206, triangular prism 207, optical splitter 208, collimation lens 9 (109,40,60) and optical splitter 209, and be reflected into vertical with the record surface of CD/DVD by triangular prism 210, then, on the record surface of CD/DVD, form beam spot (beam spot) by CD/DVD object lens 204.The red light that reflects on CD/DVD is directly advanced in optical splitter 206 by CD/DVD object lens 204, triangular prism 210, optical splitter 209, collimation lens 9 (109,40,60), optical splitter 208, triangular prism 207, and to photo detector 203 incidents.
Then, the light path to blue light describes.Make the blue light that sends from blue laser diode 202 pass through optical splitter 208 and collimator lens 9 (109,40,60), and reflect and make described blue light vertical with the record surface of BD by optical splitter 209, then, on the record surface of BD, form beam spot by BD object lens 205.Blue light by the BD reflection passes through BD object lens 205, optical splitter 209 and collimation lens 9 (109,40,60), and directly advances transmission in optical splitter 208, by triangular prism 207 and optical splitter 206, incides photo detector 203.
For red light that incides photo detector 203 and blue light, by not shown conversion equipment, be electric signal with the wavelength Conversion of red light and blue light, the information that can read on the CD/DVD/BD thus to be write down.
This optical take-up apparatus 200 is loaded on the optical disc apparatus 300.As shown in figure 15, optical disc apparatus 300 is provided with turntable 302, and described turntable 302 is inserted in the center pit of CD/DVD/BD (hereinafter referred to as dish D) and comes loading tray D, by being fixed on the Spindle Motor 303 on the base station 301, making the dish D rotation that is loaded on the turntable 302.And, axle is supported with and picks up lead screw (pick up leadscrew) 304 on base station 301, and this picks up lead screw 304 and can rotate, and is fixed with on base station 301 and is used to make mobile motor (thread motor) 305 and the guiding elements 306 that picks up lead screw 304 rotation.Also can make guiding elements 306 can carry out crooked (skew) adjusts.
On optical take-up apparatus 200, be formed with the directed section 307 that is slidingly connected with guiding elements 306, and be provided with and pick up the rack member 308 that lead screw 304 is meshed.And, in optical take-up apparatus 200, make the dish D that is loaded on CD/DVD object lens 204 and BD object lens 205 and the turntable 302 of outside surface of optical take-up apparatus 200 relative.
At this, will pick up lead screw 304 and be set to be parallel to each other, so that the moving radially of the dish D that optical take-up apparatus 200 is loaded on the turntable 302 with guiding elements 306.
By Spindle Motor 303 the dish D that is positioned on the turntable 302 is rotated on one side, make optical take-up apparatus 200 radially moving by mobile motor 305 on one side along dish D, and then, go up the beam spot of formation at dish D (CD/DVD) from the red light of the CD/DVD object lens 204 of optical take-up apparatus 200, in addition, go up the beam spot of formation at dish D (BD) from the blue light of the BD object lens 205 of optical take-up apparatus 200, thus can the information of reading and recording on dish D.
In addition, though the information of reading and recording on dish D (CD/DVD/BD) is illustrated, the present invention also can be applicable to optical take-up apparatus and the optical disc apparatus to dish D (CD/DVD/BD) recorded information.
Claims (13)
1. lens driver, it is installed on the optic, it is characterized in that,
Have:
Lead screw, its rotation by motor is rotated;
Lens mount, it is by the rotation of described lead screw, moves back and forth along the rotation of described lead screw;
Leading axle, it is parallel to described rotation and extends, and connects described lens mount and to the lens mount channeling conduct;
Lens, it remains on the free end of described lens mount with cantilever position.
2. lens driver as claimed in claim 1 is characterized in that,
Described lens are provided with jut, and this jut is outstanding towards the direction perpendicular to the optical axis of described lens from the outer peripheral face of described lens, and described jut remains on the described free end of described lens mount.
3. lens driver as claimed in claim 2 is characterized in that,
Described lens also have first pair of top, and this first pair of top is positioned on the described outer peripheral face of described lens of cardinal extremity one side of described jut,
Described lens mount has:
The ccontaining recess of projection, it is used for ccontaining described jut from the described free end depression of described lens mount;
First abutting part, it is positioned at described free end one side, is used for connecting with described first pair of top.
4. lens driver as claimed in claim 3 is characterized in that,
It is the circular arc at center that described first pair of top forms with described optical axis.
5. lens driver as claimed in claim 3 is characterized in that,
Described jut at described lens is formed with second pair of top, and extend on the plane perpendicular to described optical axis at described second pair of top,
First wall that forms the ccontaining recess of described projection is second abutting part, and described second abutting part extends on the plane perpendicular to the axis of described leading axle, is used for connecting with described second pair of top.
6. lens driver as claimed in claim 3 is characterized in that,
Second wall that forms the ccontaining recess of described projection is a protrusions limit portion, and described protrusions limit portion is that the rotation at center limits to described jut with described optical axis.
7. lens driver as claimed in claim 2 is characterized in that,
Described lens are the I font lens that are cut into the I font, and described I font lens have first and second cut surface that is parallel to each other on the outer peripheral face of described lens, and the projected direction of described first and second cut surface and described jut extends abreast.
8. lens driver as claimed in claim 1 is characterized in that,
On in the free end of the outside surface of described lens and described lens mount any one, be provided with to another outstanding register pin arbitrarily and towards described arbitrarily another outstanding and with the outstanding abreast spline pin of described register pin,
Described another is provided with arbitrarily: the pilot hole that is used to insert described register pin; Observe the spline hole of upwards extending and being used to insert described spline pin from the center of described pilot hole in the footpath of pilot hole.
9. lens driver as claimed in claim 8 is characterized in that,
The optical axis of described register pin and described spline pin and described lens extends abreast, and be formed on extend perpendicular to the described optical axis of described lens on the end face,
Described pilot hole and described spline hole are formed on by on the top, and be described by vertical and extend to the described optical axis of top and described lens.
10. lens driver as claimed in claim 8 is characterized in that,
Described register pin and described spline pin are that the tangential direction of the circle at center is extended along the optical axis with described lens, and be formed on that described optical axis with described lens extends abreast on the end face,
Described pilot hole and described spline hole are formed on quilt that the described optical axis with described lens extends abreast on the end face.
11. lens driver as claimed in claim 2 is characterized in that,
In the described jut of described lens and the free end of described lens mount any one is provided with: towards any another outstanding register pin; With towards described arbitrarily another outstanding and with the outstanding abreast spline pin of described register pin;
Described another is provided with arbitrarily: the pilot hole that is used to insert described register pin; Observe the spline hole of upwards extending and being used to insert described spline pin from the center of described pilot hole in the footpath of pilot hole.
12. an optical take-up apparatus wherein, is mounted with lens driver as claimed in claim 1.
13. an optical disc apparatus wherein, is mounted with light as claimed in claim 12 and picks up assembling device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008133476 | 2008-05-21 | ||
| JP2008133476A JP5253879B2 (en) | 2008-05-21 | 2008-05-21 | Lens drive device |
| JP2008139837 | 2008-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101587220A true CN101587220A (en) | 2009-11-25 |
Family
ID=41371538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101389548A Pending CN101587220A (en) | 2008-05-21 | 2009-05-21 | Lens driver |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5253879B2 (en) |
| CN (1) | CN101587220A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768392A (en) * | 2011-05-04 | 2012-11-07 | 亚洲光学股份有限公司 | Transmission device for optical equipment |
| CN109923332A (en) * | 2016-11-07 | 2019-06-21 | 大陆汽车有限公司 | The manufacturing method of linear drive apparatus, motor and linear drive apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884768A (en) * | 2019-03-11 | 2019-06-14 | 中国科学院上海技术物理研究所 | A kind of infrared continuous zoom lens zoom mechanism based on straight-line motion mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288972A (en) * | 1992-04-07 | 1993-11-05 | Ricoh Co Ltd | Device for holding lens |
| US20080088955A1 (en) * | 2006-09-19 | 2008-04-17 | Toru Ishimasa | Driving unit for optical pick-up including lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08194145A (en) * | 1995-01-17 | 1996-07-30 | Asahi Optical Co Ltd | Lens supporting device |
| JPH0949955A (en) * | 1995-05-31 | 1997-02-18 | Olympus Optical Co Ltd | Lens holding frame |
| JP2000011442A (en) * | 1998-06-26 | 2000-01-14 | Sony Corp | Fixing member for optical parts and optical device using the same |
| JP4106289B2 (en) * | 2003-02-21 | 2008-06-25 | シャープ株式会社 | Optical pickup lens and optical pickup device having the same |
| JP2005209267A (en) * | 2004-01-21 | 2005-08-04 | Canon Inc | Optical disk device and optical pickup |
| JP2006064886A (en) * | 2004-08-25 | 2006-03-09 | Sharp Corp | Lens, lens equipment, optical pickup device and its assembling method |
| JP2007200486A (en) * | 2006-01-27 | 2007-08-09 | Konica Minolta Opto Inc | Optical pickup device |
| JP5047980B2 (en) * | 2006-11-10 | 2012-10-10 | 日本電産コパル株式会社 | Lens drive device |
-
2008
- 2008-05-21 JP JP2008133476A patent/JP5253879B2/en not_active Expired - Fee Related
-
2009
- 2009-05-21 CN CNA2009101389548A patent/CN101587220A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288972A (en) * | 1992-04-07 | 1993-11-05 | Ricoh Co Ltd | Device for holding lens |
| US20080088955A1 (en) * | 2006-09-19 | 2008-04-17 | Toru Ishimasa | Driving unit for optical pick-up including lens |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768392A (en) * | 2011-05-04 | 2012-11-07 | 亚洲光学股份有限公司 | Transmission device for optical equipment |
| CN109923332A (en) * | 2016-11-07 | 2019-06-21 | 大陆汽车有限公司 | The manufacturing method of linear drive apparatus, motor and linear drive apparatus |
| US11761520B2 (en) | 2016-11-07 | 2023-09-19 | Continental Automotive Technologies GmbH | Linear drive device, motor, and linear drive device production method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5253879B2 (en) | 2013-07-31 |
| JP2009282243A (en) | 2009-12-03 |
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