CN1929003A - Object lens drive device - Google Patents
Object lens drive device Download PDFInfo
- Publication number
- CN1929003A CN1929003A CNA2006101215862A CN200610121586A CN1929003A CN 1929003 A CN1929003 A CN 1929003A CN A2006101215862 A CNA2006101215862 A CN A2006101215862A CN 200610121586 A CN200610121586 A CN 200610121586A CN 1929003 A CN1929003 A CN 1929003A
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- lens
- coil
- drive
- drive coil
- lens mount
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0933—Details of stationary parts
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0935—Details of the moving parts
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0956—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
Abstract
The invention provides an objective lens driving device provided with constitution by which recording and reproducing of an optical storage medium can be precisely performed even when the lens holder is driven at a high-frequency. The lens holder (3) constituting the objective lens driving device (1) is provided with a trunk part (3b) in which a through-hole (3a) is formed and a lens holding part (3c) formed so as to project from the trunk part (3b) in the direction perpendicular to the focusing direction and the tracking direction and holding an objective lens (2). In the objective lens driving device (1), a second driving magnet (14) for driving the lens holder (3) in the focusing direction and the tracking direction is provided to both sides of the lens holding part (3c) with respect to the tracking direction, and a tracking driving coil (16) and the second driving magnet (14) are disposed facing each other in the direction perpendicular to the focusing direction and the tracking direction.
Description
Technical field
What the present invention relates to is the objective lens device that is loaded on the optical-head apparatus of the record that carries out the optical storage medium thing, regeneration.
Background technology
Carry out on the optical-head apparatus of record, regeneration etc. of optical storage medium thing the objective lens device that has loaded and be provided with object lens, supported the lens mount of object lens and make the driving mechanism that lens mount drives to tracking direction and focus direction at CD (Compact Disk) and DVD (Digital Versatile Disk) etc.As this objective lens device, known has, and goes up configuration objective lens device object lens, so-called lens offset-type at the position of departing from the lens mount central part (deviation post).(for example, with reference to patent documentation 1)
In the objective lens device that patent documentation 1 is put down in writing, lens mount is by the square main part that has formed the through hole that runs through on focus direction, constitutes with the lens support sector that supports object lens.Lens support sector is, and is outstanding and form to the direction that intersects vertically with focus direction and tracking direction from a side of square main part.In addition, when focus direction was observed, the thickness of main part formed thinlyyer.
In addition, in this objective lens device, in being formed at the through hole of main part, dispose, be used to make the focusing drive coil of lens mount to the focus direction driving, be used to make the tracking drive coil of lens mount, and fixed a pair of a pair of yoke of lens mount that be used to make to the drive magnet of tracking direction and focus direction driving to the tracking direction driving.More particularly, on the one side that makes the focusing drive coil that is wound into rectangular shape, under all sides are joined in the opposite flank of main part one side that has formed lens support sectors state, dispose the focusing drive coil.In addition, with main part on the focusing drive coil that joins of all sides relative edge outside on one side, be fixed with two tracking drive coils.
[patent documentation 1] spy opens the 2003-168228 communique
Summary of the invention
Problem to be solved by this invention
In recent years, as the optical storage medium thing, with than more DVD of new generation progressively listing on market of short wavelength's the laser indigo plant dish that writes down, regenerate etc. such as existing DVD.The optical storage medium thing of new generation of representatives such as the DVD of this a new generation can carry out high density recording, and narrow than the optical storage medium thing of prior art of the interval between the record pit point (recording pit).Therefore, optical-head apparatus must carry out laser radiation to the optical storage medium thing of a new generation with high precision.In addition, in recent years, along with the record of optical storage medium thing, the requirement of regeneration high speed, the also forward high speed development of the rotational speed of optical storage medium thing.
Under this situation, even because the interval between record pit point is narrow, and produced on the optical storage medium thing of high speed rotating under the situation of eccentric and surface vibration, also carry out record, the regeneration of optical storage medium thing, therefore need to make object lens to follow the tracks of its objective lens device eccentric and surface vibration with high sensitivity with high precision.That is to say, need on the market to have, even produced on the optical storage medium thing of new generation when writing down with high speed rotating and regenerating under the situation of eccentric and surface vibration, also can follow the tracks of its off-centre and surface vibration and the objective lens device of the lens mount of high-frequency drive.
Yet, in the objective lens device that patent documentation 1 is put down in writing, in being formed at the through hole of main part, dispose a pair of yoke that focuses on drive coil, follows the tracks of drive coil and fixed a pair of drive magnet, form bigger through hole.In addition, in this objective lens device, as the focusing drive coil at the driving center of lens mount with follow the tracks of drive coil, be configured on the position in the through hole that is formed at main part, that depart from from the lens support sector that supports object lens.That is to say, in this objective lens device, though when focus direction is observed, thereby the thickness of main part forms to such an extent that the rigidity of thinner main part is low, and the driving center and the distance between the object lens of lens mount are elongated.Therefore, in this objective lens device, when the off-centre that produces and surface vibration on for the optical storage medium thing of following the tracks of a new generation and lens mount high-frequency drive, between the driving center and object lens of lens mount, be easy to generate distortion and distortion such as crooked on the lens mount.In addition, in case produce distortion on lens mount, then the distortion quantitative change in lens support sector is big.Thereby, be difficult to make off-centre and the surface vibration of object lens to produce on the sensitivity tracking illumination storage medium preferably.Consequently, in the objective lens device that patent documentation 1 is put down in writing, under the situation of lens mount high-frequency drive, be difficult to carry out record, the regeneration of optical storage medium thing with high precision.
Therefore, the object of the present invention is to provide a kind ofly to have,, also can carry out the objective lens device of formation of record, the regeneration of optical storage medium thing with high precision even under the situation of lens mount high-frequency drive.
Solve the means of problem
In order to solve above-mentioned problem, objective lens device of the present invention, the driving mechanism that is provided with object lens, supports the lens mount of object lens and lens mount is driven to tracking direction and focus direction at least, it is characterized in that, driving mechanism has: the drive magnet that is used to make lens mount to drive to tracking direction and focus direction at least, be used to make the focusing drive coil of lens mount, and be used to make the tracking drive coil of lens mount to the tracking direction driving to the focus direction driving; Lens mount has: the main part and and the lens support sectors that form, support object lens outstanding to the direction that intersects vertically with focus direction and tracking direction from main part that have formed the through hole that runs through and the coil coiling portion that focuses on drive coil of reeling on focus direction; On the tracking direction both sides of lens support sector, be provided with drive magnet; Follow the tracks of drive coil and drive magnet, with direction that focus direction and tracking direction intersect vertically on relative.
In objective lens device of the present invention, on the tracking direction both sides of lens support sector, be provided with drive magnet.Therefore, in objective lens device of the present invention, when on lens mount, forming through hole, do not need to consider to be arranged at the size of the drive magnet on the lens support sector both sides.Therefore, can dwindle the through hole that is formed on the lens mount, thus the size of reducing glass frame self.Consequently, can shorten the driving center of lens mount and the distance between the object lens.Therefore, even under the situation of off-centre that produces on for the tracking illumination storage medium and surface vibration and lens mount high-frequency drive, also be difficult on lens mount, produce distortion and distortion such as crooked.In addition, even between the driving center and object lens of lens mount, produced on the lens mount under distortion and the situation of being out of shape such as crooked, the deflection in lens support sector diminishes, and also can make off-centre and the surface vibration of object lens to produce on the sensitivity tracking illumination storage medium preferably.
In addition, in objective lens device of the present invention, follow the tracks of drive coil and drive magnet, with direction that focus direction and tracking direction intersect vertically on relative.Here, following the tracks of drive coil and drive magnet under situation relative on tracking direction or the focus direction, the relative tracking drive coil of drive magnet with on the tracking direction both sides that are arranged at lens support sector is configured on the tracking direction both sides of lens support sector.Therefore, in the objective lens device of so-called lens offset-type, follow the tracks of drive coil and be and be configured in from the position of the driving misalignment of the focus direction of lens mount, because this follows the tracks of the influence of drive coil weight during the lens mount high-frequency drive, on lens mount, produce distortion and crooked etc. distortion easily.With respect to this, in the present invention, owing to follow the tracks of drive coil and drive magnet, with direction that focus direction and tracking direction intersect vertically on be relative, therefore, the tracking drive coil relative with drive magnet on the tracking direction both sides that are arranged on lens support sector can be arranged on the main part side of lens mount.Therefore, in objective lens device of the present invention,, also can suppress the distortion of the lens mount that produces because of the influence of following the tracks of drive coil weight even under the situation of lens mount high-frequency drive.Consequently, the deflection in the lens support sector can be suppressed at, off-centre and the surface vibration of object lens can be made to produce on the sensitivity tracking illumination storage medium preferably.
In the present invention, be thorough coil coiling portion and to form, focus on drive coil be that periphery along coil coiling portion is wound as good with through hole.If adopt such formation, under the situation that then even the thickness in coil coiling portion when focus direction is observed forms thinlyyer, the rigidity of main part reduces, also can be by suppress the distortion and the distortion such as crooked of lens mount after reeling through the rigidity of the focusing drive coil of the bonding processing of self-heating.That is to say, can pass through to guarantee the rigidity of lens mount along the rigidity of the focusing drive coil of coil coiling portion periphery coiling.Therefore,, also can further suppress the distortion of lens mount, can make the off-centre and the surface vibration of object lens to produce on the better sensitivity tracking illumination storage medium even under the situation of lens mount high-frequency drive.
In the present invention, on lens mount, to form two coil coiling portions, utilization is wound on the driving force that produces on the focusing drive coil in a side the coil coiling portion, poor with the driving force that produces on the focusing drive coil in the coil coiling portion that is wound on the opposing party in an inclined direction drives to good lens mount.If adopt this formation, then do not need to be provided with separately drive coil and the drive magnet that pitch drives is used, lens mount also can carry out pitch drives.In addition, focusing on drive coil under the situation of coil coiling portion periphery coiling, also can guarantee the rigidity of lens mount by focusing on the rigidity of drive coil.
The effect of invention
As mentioned above, in the objective lens device that the present invention relates to,, also can carry out record, the regeneration of optical storage medium thing with high precision even under the situation of lens mount high-frequency drive.
The simple declaration of accompanying drawing
Fig. 1 is the vertical view of the objective lens device that relates to of expression the invention process form one.
Fig. 2 is the outboard profile of expression objective lens device shown in Figure 1.
Fig. 3 is the sectional view of the section X-X of presentation graphs 1.
Fig. 4 is the synoptic diagram of lens mount shown in Figure 1, and wherein (A) is vertical view, (B) is outboard profile.
Fig. 5 is the outboard profile of the lens mount that relates to of the variation one of expression the invention process form one.
Fig. 6 is the vertical view of the objective lens device that relates to of the variation two of expression the invention process form one.
Fig. 7 is the outboard profile of expression objective lens device shown in Figure 6.
Fig. 8 is the synoptic diagram of lens mount shown in Figure 6, and wherein (A) is vertical view, (B) is outboard profile.
Fig. 9 is the vertical view of the objective lens device that relates to of the variation three of expression the invention process form one.
Figure 10 is the vertical view of the objective lens device that relates to of expression the invention process form two.
Figure 11 is the synoptic diagram of lens mount shown in Figure 10, and wherein (A) is outboard profile, (B) is the front elevation of observing from the Y-Y direction of (A).
Figure 12 is the vertical view of the objective lens device that relates to of the variation of expression the invention process form two.
The explanation of symbol
1,21,51,71 objective lens devices
2 object lens
3,23,53,73 lens mounts
3a, 23a, 53a, 73a through hole
3b, 23b, 53b, 73b main part
3c, 23c, 53c, 73c lens support sector
3f, 23f, 53f, 73f coil coiling portion
6,26,56 driving mechanisms
14,64 second drive magnets (drive magnet)
15,65 focus on drive coil
16 follow the tracks of drive coil
The Fo focus direction
The Tr tracking direction
The Ti vergence direction
Best example of the present invention
Below, best example of the present invention is described with reference to the accompanying drawings.
[example one]
(formation of objective lens device)
Fig. 1 is the vertical view of the objective lens device 1 that relates to of expression the invention process form one.Fig. 2 is the outboard profile of expression objective lens device 1 shown in Figure 1.Fig. 3 is the sectional view of the section X-X of presentation graphs 1.Fig. 4 is the synoptic diagram of expression lens mount 3 shown in Figure 1, and wherein (A) is vertical view, (B) is outboard profile.
The objective lens device 1 of this example is, in order to carry out record, the regeneration of optical storage medium things such as CD, DVD or DVD of new generation (omitting diagram), and is used in the drive unit on the optical-head apparatus (omitting diagram) with regulation optical system.Particularly, the objective lens device 1 of this example is, even with than prior art more short wavelength's laser write down, regenerate, narrow at interval optical storage medium thing between the record pit point (recording pit), under situation, also can carry out the objective lens device on optical-head apparatus high-frequency drive, that be loaded into the record that can correctly carry out the optical storage medium thing, regeneration than prior art faster speed high speed rotating.Shown in Fig. 1 waits, this objective lens device 1 is the objective lens device of so-called steel wire hanging type, be provided with: object lens 2, support the lens mount 3 of object lens 2, support lens mounts 3, make them can be with four steel wires 4 to the mobile fixation side parts 5 of focus direction (direction of representing with arrow mark Fo) and tracking direction (direction of representing with arrow mark Tr), and the driving mechanism 6 that lens mount 3 is driven to focus direction and tracking direction.
And, unanimous on the whole at the radial direction and the tracking direction of the optical storage medium thing of the enterprising line item of optical-head apparatus, regeneration.In addition, the direction that intersects vertically with focus direction and tracking direction (left and right directions of Fig. 1, the direction of representing with arrow mark Ta), unanimous on the whole with the tangential direction (tangential direction) of optical storage medium thing.Therefore, below will be recited as tangential direction with the direction that focus direction and tracking direction intersect vertically.
As shown in Figures 1 and 2, four steel wires 4, overlapping and be provided with on focus direction, and on each side of the tracking direction both sides of lens mount 3, respectively be provided with two.This steel wire 4 also has, as to the focusing drive coil 15 described later and the function of following the tracks of the feed steel wire of drive coil 16 feeds.Therefore, the front of steel wire 4 is fixed on repeat circuit plate 10 fixing on the tracking direction both sides of lens mount 3 by welding.More particularly, on two blocks of repeat circuit plates 10,10, be fixed with the front of two steel wires 4 respectively.And, on repeat circuit plate 10,10, be connected with and focus on drive coil 15 and tracking drive coil 16.On the other hand, the base end side of steel wire 4 is fixed by welding on the printed circuit board (PCB) 11 at the back side (left side of Fig. 1) that is installed on support holding components 7.
Yoke 8 is to be formed by the metal parts with magnetic.The yoke 8 of this example is, forms roughly rectangular shape by the sheet steel of corrosion resistant plate etc.This yoke 8, be by bottom surface sections 8a, be configured in the aftermentioned through hole 3a that is formed on the lens mount 3, fixing first 8b of magnet support sector of aftermentioned first drive magnet 13 simultaneously, and be configured on the tracking direction both sides of the aftermentioned lens 3c of support sector that constitutes lens mount 3, fixedly two second 8c of magnet support sector, the 8c of two second drive magnets of aftermentioned 14,14 constitute respectively simultaneously.
First 8b of magnet support sector and second 8c of magnet support sector, 8c lift up and form from bottom surface sections 8a bending.More particularly, first 8b of magnet support sector is, the approximate centre portion of bottom surface sections 8a lifts up towards right lateral bending from the left side of Fig. 1 and Fig. 2 and forms.In addition, second 8c of magnet support sector, 8c be, on the right-hand member side of bottom surface sections 8a, the tracking direction both end sides is lifted up towards left lateral bending from the right side of Fig. 1 and Fig. 2 and formed.
As shown in Figure 3, shoot out from the LASER Light Source of omitting illustrated optical-head apparatus and pass through hole 8d what omit that laser that illustrated optical storage medium thing is reflected passes through, run through bottom surface sections 8a and be formed on the bottom surface sections 8a.More particularly,, on the right-hand member side of bottom surface sections 8a, be formed on the approximate centre position of tracking direction, by hole 8d with corresponding with the position of object lens 2 on focus direction.
Shown in Fig. 4 waited, main part 3b was, was formed at the general square shape coil coiling 3f of portion of lower portion among Fig. 4 (B), and was formed among Fig. 4 (B) the flat general square shape coil linking part 3g of upper portion and became one and constitute.The coil coiling 3f of portion is formed on the approximate centre position of coil linking part 3g.In addition, shown in Fig. 4 waited, the profile of the coil coiling 3f of portion when focus direction is observed formed the profile less than coil linking part 3g.On the coil coiling 3f of portion, focus on drive coil 15 and reel along the periphery of the coil coiling 3f of portion, the downside of coil linking part 3g joins with an end (more particularly, being the upper end of Fig. 3) that focuses on drive coil 15.
Shown in Fig. 4 waited, through hole 3a was formed in the approximate centre portion of main part 3b, slightly rectangular in shape.That is to say that through hole 3a is the thorough coil coiling 3f of portion and forming.More particularly, for miniaturization, the lightweight of seeking lens mount 3, through hole 3a forms, and the thickness of the coil coiling 3f of portion is thinner when focus direction is observed.Shown in Fig. 1 waits, dispose first 8b of magnet support sector and aftermentioned first drive magnet 13 in this through hole 3a.In addition, the width of the tracking direction of coil linking part 3g is wider than the width of the tracking direction of yoke 8.
The 3c of lens support sector is outstanding and form to tangential direction (direction that intersects vertically with focus direction and tracking direction) from the side of square main part 3b.More particularly, shown in Fig. 1 waited, the 3c of lens support sector was to give prominence to (being connected in coil linking part 3g) and formation to the right from the tracking direction central part of coil linking part 3g right flank.In addition, lens mount 3 side component 5 support that is fixed is that the right flank of second 8c of magnet support sector, the 8c of the right-hand member of the 3c of lens support sector and yoke 8 is unanimous on the whole on tangential direction.
The width of the tracking direction of the 3c of lens support sector is than the tracking direction narrow width of the coil linking part 3g of main part 3b.For example, the width of the tracking direction of the 3c of lens support sector, be coil linking part 3g the tracking direction width about about 1/3rd.Be positioned at the right flank of the coil linking part 3g on the lens support sector 3c both sides, become two installation portion 3d, 3d (with reference to Fig. 4) that follow the tracks of drive coil 16,16 of aftermentioned are installed.
In addition, as shown in Figure 3, penetrate by the LASER Light Source of omitting illustrated optical-head apparatus and pass through hole 3e what omit that the laser that is reflected on the illustrated optical storage medium thing passes through, run through the 3c of lens support sector and be formed on the 3c of lens support sector.More particularly, be formed at the downside of the object lens of being supported by lens support sector 3c upper surface 2 by hole 3e.
Driving mechanism 6 is except that above-mentioned yoke 8, also have: be used to make lens mount 3 first drive magnet 13 and two second drive magnets 14,14 to focus direction and tracking direction driving, be used to make the focusing drive coil 15 of lens mount 3, and be used to make two the tracking drive coils 16,16 of lens mount 3 to the tracking direction driving to the focus direction driving.
Shown in Fig. 1 waits, focus on drive coil 15, be wound into roughly rectangular shape along the periphery of the coil coiling 3f of portion and the lower surface of coil linking part 3g.More particularly, under the periphery state of contact of full week of the interior all sides that focus on drive coil 15 and the coil coiling 3f of portion, and, under the lower surface state of contact of upper surface that focuses on drive coil 15 and coil linking part 3g, focusing drive coil 15 is fixed on the outer circumferential side of the coil coiling 3f of portion by methods such as bondings.Constitute on the lead outer circumferential side of this focusing drive coil 15 and be covered with the heat bonding overlay film, focus on drive coil 15 after reeling under the state through the bonding processing of self-heating, embed and be fixed on the coil coiling 3f of portion with hollow.
Follow the tracks of drive coil 16,16, be wound into flat rectangular shape,, be installed on installation portion 3d, the 3d and focusing drive coil 15 of lens mount 3 as Fig. 1 and shown in Figure 3.More particularly, wherein one side in the face that intersects vertically with the flat direction of following the tracks of drive coil 16,16 (face that intersects vertically with winding direction) is fixed on by methods such as bondings on the right flank of installation portion 3d, the 3d of lens mount 3 and the focusing drive coil 15 among Fig. 3.Drive coil 15 is identical with focusing on, and constitutes on the lead outer circumferential side of following the tracks of drive coil 16,16 to be covered with the heat bonding overlay film.And, follow the tracks of drive coil 16,16, under the state through the bonding processing of self-heating after reeling, be installed on installation portion 3d, the 3d and focusing drive coil 15 of lens mount 3 with hollow.Shown in Fig. 1 waits, follow the tracks of drive coil 16,16, relative with second drive magnet 14,14 on tangential direction.
Shown in Fig. 1 waited, in this example, the outer circumferential side of the coil coiling 3f of portion of lens mount 3 was provided with and focuses on drive coil 15.In addition, following the tracks of drive coil 16,16 is installed on the right flank of the focusing drive coil 15 among installation portion 3d, 3d and Fig. 3.And then, first drive magnet 13 and second drive magnet 14,14, the right flank side of clamping main part 3b is provided with.Therefore, on the one side that focuses on drive coil 15 and when following the tracks of drive coil 16,16 and be set up, by the magnetic circuit that first drive magnet 13 and second drive magnet 14,14 and yoke 8 form, the right flank part of the main part 3b that the 3c of scioptics support sector is outstanding.That is to say, the right flank part of main part 3b, the driving center of driven lens mount 3 is unanimous on the whole with passing through driving mechanism 6.
In having the objective lens device 1 that constitutes as mentioned above, if provide electric current to focusing on drive coil 15, then lens mount 3 drives on focus direction; If provide electric current to following the tracks of drive coil 16,16, then lens mount 3 drives on tracking direction.
(the main effect of this example)
As mentioned above, in the objective lens device 1 of this example, be used for making lens mount 3 first drive magnet 13 and two second drive magnets 14,14 to focus direction and tracking direction driving, first drive magnet 13 is arranged in the through hole 3a of lens mount 3, and 14,14 of second drive magnets are arranged on the tracking direction both sides of the 3c of lens support sector.Therefore, in objective lens device 1, do not need to consider the size of second drive magnet 14,14, just can on lens mount 3, form through hole 3a.Therefore, can form smaller through hole 3a, thus can the reducing glass frame 3 self sizes.Consequently, can shorten the driving center of lens mount 3 and the distance between the object lens 2, thereby, also be difficult on lens mount 3 to produce distortion and distortion such as crooked even under the situation of off-centre that produces on the lens mount 3 high-frequency drive tracking illumination storage mediums and surface vibration.In addition, even because between the driving center and object lens 2 of lens mount 3, produce distortion and crooked the grade under the situation of being out of shape on the lens mount 3, also can shorten the driving center of lens mount 3 and the distance between the object lens 2, so the deflection on the 3c of lens support sector is diminished.Consequently, can make off-centre and the surface vibration of object lens 2 to produce on the sensitivity tracking illumination storage medium preferably.
Particularly in this example, the right flank part of the main part 3b that the 3c of lens support sector is outstanding is and by driving mechanism 6 and the driving center of driven lens mount 3 is unanimous on the whole.Therefore, the driving center of lens mount 3 and the distance between the object lens 2 be can shorten,, distortion and distortion such as crooked also are difficult on lens mount 3 to produce even under the situation of lens mount 3 high-frequency drive.In addition, even between the driving center and object lens 2 of lens mount 3, produce on the lens mount 3 under distortion and the situation of being out of shape such as crooked, the deflection on the 3c of lens support sector also diminishes.Consequently, can make off-centre and the surface vibration of object lens 2 to produce on the sensitivity tracking illumination storage medium preferably.
In addition, in the objective lens device 1 of this example, it is relative on tangential direction with second drive magnet 14,14 to follow the tracks of drive coil 16,16.Therefore, the tracking drive coil 16,16 relative with second drive magnet 14,14 can be arranged on the main part 3b side (more particularly, being the right flank of main part 3b) of lens mount 3.So,, under the situation of lens mount 3 high-frequency drive, also can suppress the distortion of the lens mount 3 that produces because of the influence of following the tracks of drive coil 16,16 weight even compare with following the tracks of the situation that drive coil 16,16 is arranged on the 3c of lens support sector.Consequently, the deflection on the 3c of lens support sector can be suppressed at, off-centre and the surface vibration of object lens 2 can be made to produce on the sensitivity tracking illumination storage medium preferably.
In this example, focus on drive coil 15 and reel along the periphery of the coil coiling 3f of portion.Therefore, as this example, thereby even the thickness of the coil coiling 3f of portion when focus direction is observed form under the rigidity of the thinner main part 3b situation about reducing, by after reeling with hollow through the rigidity of the focusing drive coil 15 of the bonding processing of self-heating, can suppress the distortion and the distortion such as crooked of lens mount 3.Therefore,, also can suppress the distortion of lens mount 3, can make the off-centre and the surface vibration of object lens 2 to produce on the sensitivity tracking illumination storage medium preferably even under the situation of lens mount 3 high-frequency drive.
Particularly in this example, under the periphery state of contact of full week of the interior all sides that focus on drive coil 15 and the coil coiling 3f of portion, focusing drive coil 15 waits by bonding and is fixed.Therefore, can further improve the rigidity of lens mount 3 effectively
(variation one of example one)
In the objective lens device 1 that above-mentioned example one relates to, focus on drive coil 15 and be fixed on the coil coiling 3f of portion in the back embedding of reeling with hollow.But, focusing on drive coil 15, also can directly be wound on the coil coiling 3f of portion by winder.In this case, the situation that coil of wire is loose in order to prevent to reel work as shown in Figure 5, is good to be provided with towards the collar part 3h of outside expansion on the lower end side of the coil coiling 3f of portion.And, even in this case, have heat on the focusing drive coil 15 behind the coiling and be applied in, focus on drive coil 15 by the bonding processing of self-heating.
(variation two of example one)
The objective lens device 1 that above-mentioned example one relates to is, the objective lens device of the steel wire hanging type that the support of lens mount 3 by steel wire 4 can be moved to focus direction and tracking direction.But as Figure 6 and Figure 7, objective lens device also can be that lens mount 23 can be to focus direction and tracking direction objective lens device 21 that move, so-called axle sliding-type by the support of back shaft 24.Below, this objective lens device 21 is described.And, in the following description, for being marked with prosign, and omitting or simplify its explanation with objective lens device 1 identical formation.
Objective lens device 21 is identical with objective lens device 1, also is the objective lens device that can carry out high-frequency drive.As Fig. 6 and shown in Figure 7, this objective lens device 21 has: object lens 2, support the lens mount 23 of object lens 2, support lens mounts 23, make its fixation side parts 25 that can move to focus direction and tracking direction with back shaft 24, and the driving mechanism 26 that lens mount 23 is driven to focus direction and tracking direction.
Fixation side parts 25 also have except back shaft 24: fixed the axle fixed part 27 of the bulk of back shaft 24, with a part that constitutes driving mechanism 26, be fixed on yoke 28 on the fixed part 27 simultaneously.Shown in Fig. 7 waited, the lower end of back shaft 24 was fixed on the fixed part 27 on the diagram left end side.
Yoke 28 is identical with yoke 8, form by metal parts with magnetic, by bottom surface sections 28a, lift up and first 28b of magnet support sector that forms, fix first drive magnet 13 from bottom surface sections 28a bending, and lift up and two second 28c of magnet support sector, 28c forming, fix second drive magnet 14,14 respectively constitute from bottom surface sections 28a bending.Identical with example one, first 28b of magnet support sector is configured in the aftermentioned through hole 23a that is formed on the lens mount 23, and second 28c of magnet support sector, 28c are configured on the tracking direction both sides of the aftermentioned lens 23c of support sector that constitutes lens mount 23.
Lens mount 23 has, and is equivalent to main part 23b and the 23c of lens support sector of main part 3b and the 3c of lens support sector respectively.As shown in Figure 8, main part 23b is provided with, and is equivalent to coil coiling 23f of portion and the coil linking part 23g of coil coiling 3f of portion and coil linking part 3g respectively.Form the through hole 23a that is equivalent to above-mentioned through hole 3a on this main part 23b, in addition, be positioned at the right flank of the main part 23b on the lens support sector 23c both sides, become installation portion 23d, the 23d (with reference to Fig. 8) that are equivalent to above-mentioned installation portion 3d, 3d.
Lens mount 23 also has the 23j of bearing portion of the dead eye 23i that has formed slotting logical back shaft 24 on the basis of these formations.Shown in Fig. 6 waited, the 23j of bearing portion was, and is outstanding and be provided with to the diagram left direction from the tracking direction core of main part 23b left surface.In addition, the 23j of bearing portion forms the roughly the same height of height with main part 23b on focus direction, guarantee the length of slipper between dead eye 23i and the back shaft 24.Therefore, by back shaft 24 and dead eye 23i, can suitably guide lens mount 23 into focus direction.
Driving mechanism 26 has: 13, two second drive magnets of yoke 28, the first drive magnets 14,14, focus on drive coil 15, and two are followed the tracks of drive coil 16,16.Objective lens device 21 is also identical with objective lens device 1, the main part 23b right flank part among Fig. 6, and the driving center of driven lens mount 23 is unanimous on the whole with passing through driving mechanism 26.
Even have as above the objective lens device 21 that constitutes, also can access the effect identical with above-mentioned objective lens device 1.
(variation three of example one)
In the objective lens device 1 that above-mentioned example one relates to, follow the tracks of drive coil 16,16 and be installed in respectively, as the installation portion 3d, the 3d that are positioned at the main part 3b right flank on the lens support sector 3c both sides, and focus on the right flank of drive coil 15.But the installation site of following the tracks of drive coil 16,16 is not limited to the right flank of installation portion 3d, 3d and focusing drive coil 15.
For example, shown in Fig. 9 (A), also can be installed in respectively on the two sides (upper side and downside among Fig. 9 (A)) that the tracking direction with main part 3b intersects vertically following the tracks of drive coil 16,16.More particularly, also can be installed in the coil linking part 3g among Fig. 9 (A) respectively and focus on the upper side of drive coil 15 following the tracks of drive coil 16,16, or the coil linking part 3g among Fig. 9 (A) and focusing on the downside of drive coil 15.Even in this case, also can access the effect identical with above-mentioned example one.And, in this case, also can widen the width of the tracking direction of the width of tracking direction of second drive magnet 14,14 and second 8c of magnet support sector, 8c, make second drive magnet 14,14 and to follow the tracks of drive coil 16,16 relative on tangential direction.
In addition, shown in Fig. 9 (B), also can be on interior all sides of the main part 3b of lens mount 3 right flank, form two recesses that (right side among Fig. 9 (B)) laterally subsides, and on these two recesses, install respectively and follow the tracks of drive coil 16,16.In this case, also can access the effect identical with above-mentioned example one.In addition, by being wound on the focusing drive coil 15 on the coil coiling 3f of portion, and be arranged on the tracking drive coil 16,16 on all sides in the main part 3b, the intensity of lens mount 3 is strengthened, and can suppress the distortion that produces on the lens mount 3 and distortion such as crooked.
And then, shown in Fig. 9 (C), also on interior all sides of the two sides that can intersect vertically (upper side and downside among Fig. 9 (C)) at tracking direction with main part 3b, form the recess that (upside or downside among Fig. 9 (C)) laterally subsides respectively, and on this recess, install respectively and follow the tracks of drive coil 16.In this case, also can access the effect identical with above-mentioned example one.In addition, identical with the objective lens device shown in Fig. 9 (B), by focusing on drive coil 15 and following the tracks of drive coil 16,16, the intensity of lens mount 3 is strengthened, can suppress the distortion that produces on the lens mount 3 and distortion such as crooked.
And then, shown in Fig. 9 (D), also can be in main part 3b on all sides, and on two places of the 3c of lens support sector side corner sections, form the recess that (right side among Fig. 9 (D) and upside or right side and downside) laterally subsides, and on this recess, install respectively and follow the tracks of drive coil 16,16.In this case, also can access the effect identical with above-mentioned example one.In addition, identical with the objective lens device shown in Fig. 9 (B), Fig. 9 (C), by focusing on drive coil 15 and following the tracks of drive coil 16,16, the intensity of lens mount 3 is strengthened, and can suppress the distortion that produces on the lens mount 3 and distortion such as crooked.
In addition, in the objective lens device 21 of the axle sliding-type shown in Fig. 6 waits, also can be provided with and follow the tracks of drive coil 16,16 being provided with on the position of the tracking drive coil 16,16 shown in Fig. 9 (A)～Fig. 9 (D).
[example two]
(formation of objective lens device)
Figure 10 is the vertical view of the objective lens device 51 that relates to of expression the invention process form two.Figure 11 is the synoptic diagram of lens mount 53 shown in Figure 10, and wherein (A) is outboard profile, (B) is the front elevation of observing from the Y-Y direction of (A).
As Figure 10 and shown in Figure 11, the objective lens device 51 of this example, two the coil coiling 53f of portion, 53f on lens mount 53, have been formed, on each coil coiling 53f of portion, 53f, be wound with respectively and focus on drive coil 65,65, different with the objective lens device 1 that example one relates in this.In addition, the objective lens device 51 of this example, utilization be wound on the driving force that produces on the focusing drive coil 65 on a side the coil coiling 53f of portion, with the coil coiling 53f of portion that is wound on the opposing party on focusing drive coil 65 on the driving force that produces poor, lens mount 53 adippings (direction of representing with arrow mark Ti) are driven on this point, different with the objective lens device 1 that example one relates to.Therefore, below with this different center that constitutes, the objective lens device 51 of this example is described, for being marked with prosign, and omitting or simplify its explanation with objective lens device 1 identical formation.
Objective lens device 51 is identical with objective lens device 1, is the objective lens device that can carry out high-frequency drive.As shown in figure 10, this objective lens device 51 is objective lens devices of so-called steel wire hanging type, be provided with: object lens 2, support the lens mount 53 of object lens 2, support lens mounts 53, make its fixation side parts 55 that can move to focus direction, tracking direction and vergence direction with six roots of sensation steel wire 4, and the driving mechanism 56 that lens mount 53 is driven to focus direction, tracking direction and vergence direction.
Fixation side parts 55 have six roots of sensation steel wire 4 and support holding components 7.In addition, fixation side parts 55 also have, and when constituting main body frame, constitute the yoke 58 of the part of driving mechanism 56.The front of steel wire 4 is fixed on repeat circuit plate 10 fixing on the tracking direction both sides of lens mount 53 by welding.In addition, the base end side of steel wire 4 is fixed by welding on the printed circuit board (PCB) 11 that is installed on support holding components 7 back sides.Support holding components 7 is fixed on the upper surface of yoke 58 by fixing means such as bondings on the diagram left end side.
Yoke 58 is identical with above-mentioned yoke 8, utilizes the sheet steel of corrosion resistant plate etc. to form roughly rectangular shape.This yoke 58 is, by bottom surface sections 58a, be configured in two through hole 53a, the 53a being formed on the lens mount 53 respectively, fixedly two first 58b of magnet support sector, the 58b of two first drive magnets of aftermentioned 63,63 simultaneously, and be configured on the tracking direction both sides of the 53c of lens support sector of lens mount 53, fixedly two second 58c of magnet support sector, the 58c of two second drive magnets of aftermentioned 64,64 constitute respectively simultaneously.
First 58b of magnet support sector, 58b and second 58c of magnet support sector, 58c all lift up and form from bottom surface sections 58a bending.More particularly, first 58b of magnet support sector, 58b be, in the approximate centre portion of the tangential direction of bottom surface sections 58a, the tracking direction both end sides is crooked lifting up and forming to the right from the left side of Figure 10.In addition, second 58c of magnet support sector, 58c be, on the right-hand member side of bottom surface sections 58a, the tracking direction both end sides is crooked lifting up and forming to the left from the right side of Figure 10.
Lens mount 53 is formed by resin component, as shown in figure 10, and by the main part 53b that has formed two through hole 53a, 53a on focus direction, running through, constitute with the 53c of lens support sector with upper surface holder mirror 2.
Shown in Figure 11 waited, main part 53b was, was formed at two the coil coiling 53f of portion, 53f of the general square shape of lower portion among Figure 11, and was formed among Figure 11 the flat rectangular-shaped coil linking part 53g of upper portion and became one and constitute.Shown in Figure 11 (B) etc., two the coil coiling 53f of portion, 53f are formed on the tracking direction both end sides of coil linking part 53g.More particularly, two the coil coiling 53f of portion, 53f, be formed on the tracking direction both end sides of coil linking part 53g, make the focusing drive coil 15,15 of reeling not exceed the tracking direction outside of coil linking part 53g along the periphery of the coil coiling 53f of portion, 53f.In addition, the downside of coil linking part 53g joins with an end that focuses on drive coil 15,15.
Shown in Figure 11 waited, through hole 53a, 53a were formed at respectively on the tracking direction both end sides of main part 53b, slightly rectangular in shape.More particularly, through hole 53a, 53a are that the thorough coil coiling 53f of portion, 53f form on focus direction.For miniaturization, the lightweight of seeking lens mount 3, this through hole 53a forms, and the thickness of the coil coiling 53f of portion, 53f is thinner when focus direction is observed.In addition, as shown in figure 10, dispose first 58b of magnet support sector, 58b in through hole 53a, the 53a, reach aftermentioned first drive magnet 63,63.
The 53c of lens support sector is identical with example one, is to give prominence to and form to tangential direction (more particularly, being the right direction of Figure 10) from the tracking direction central part of main part 53b right flank.The width of the tracking direction of the 53c of this lens support sector is than the narrow width of the tracking direction of coil linking part 53g.For example, the width of the tracking direction of the 53c of lens support sector, be coil linking part 53g the tracking direction width about about 1/3rd.Be positioned at the right flank of the coil linking part 53g on the lens support sector 53c both sides, become two installation portion 53d, 53d that follow the tracks of drive coil 16,16 parts are installed.
Driving mechanism 56 is identical with above-mentioned driving mechanism 6, have two and follow the tracks of drive coil 16,16, also have simultaneously: yoke 58, be used to make lens mount 53 63,63 and two second drive magnets 64,64 of two first drive magnets, and be used to make two the focusing drive coils 65,65 of lens mount 53 to the focus direction driving to focus direction, tracking direction and vergence direction driving.
First drive magnet 63,63 forms rectangular shape, is separately fixed on each right flank of two first 58b of magnet support sector, 58b among Figure 10.The width of the tracking direction of first drive magnet 63,63, roughly the same with the width of the tracking direction of first 58b of magnet support sector, 58b.Second drive magnet 64,64 forms rectangular shape, is separately fixed on each left surface of two second 58c of magnet support sector, 58c.That is to say that second drive magnet 64,64 is arranged on the tracking direction both sides of the 53c of lens support sector.In addition, the width of the tracking direction of second drive magnet 64,64, roughly the same with the width of the tracking direction of second 58c of magnet support sector, 58c.
Identical with example one, first drive magnet 63,63 and second drive magnet 64,64, all the two poles of the earth are magnetized on tangential direction.More particularly, for example, first drive magnet 63,63 and second drive magnet 64,64 in Figure 10, all are geomagnetic into its right side and become the S utmost point, and the left side becomes the N utmost point.
Shown in Figure 10 waits, focus on drive coil 65,65, be wound into roughly rectangular shape along the periphery of the coil coiling 53f of portion, 53f and the lower surface of coil linking part 53g.More particularly, under the periphery state of contact of full week of the interior all sides that focus on drive coil 65,65 and the coil coiling 53f of portion, 53f, and, under the upper surface that focuses on drive coil 65,65 and the lower surface state of contact of coil linking part 53g, focus on drive coil 65,65 and be fixed on the outer circumferential side of the coil coiling 53f of portion, 53f by boning etc.Identical with the focusing drive coil 15 of example one, on the lead outer circumferential side that constitutes this focusing drive coil 65,65, be covered with the heat bonding overlay film, under the state through the bonding processing of self-heating, embedding is fixed on the coil coiling 53f of portion, the 53f focusing drive coil 65,65 after reeling with hollow.
The focusing drive coil 65,65 of this example has the function as the tilt coil that is used to make lens mount 53 adippings to drive.That is to say, in this example, utilization be wound on the driving force that produces on the focusing drive coil 65 on a side the coil coiling 53f of portion, with the coil coiling 53f of portion that is wound on the opposing party on focusing drive coil 65 on the driving force that produces poor, lens mount 53 adippings are driven.For example, in the objective lens device 51 of this example, electric current as if two focusing drive coils 65,65 being provided equal-sized equidirectional then focuses on the driving forces that produce identical size on the drive coils 65,65 at two, and lens mount 53 is driven on focus direction.In addition, for example, in objective lens device 51, if focus on the electric current that drive coil 65,65 provides the equidirectional that varies in size respectively to two, or focus on the electric current that drive coil 65,65 provides different directions to two respectively, then focus on and produce the driving force that varies in size on the drive coil 65,65, lens mount 53 adippings are driven at two.
It is identical with example one to follow the tracks of drive coil 16,16, is installed in installation portion 53d, the 53d of lens mount 53, and the right flank among Figure 10 of focusing drive coil 65,65, and relative with second drive magnet 64,64 on tangential direction.In addition, the installation site of following the tracks of drive coil 16,16 is not limited to installation portion 53d, 53d, and the right flank among Figure 10 of focusing drive coil 65,65, also can be installed in, on the position corresponding with the installation site of the tracking drive coil 16,16 shown in Fig. 9 (A)～9 (D) with following the tracks of drive coil 16,16.
In this example, as shown in figure 10, on the outer circumferential side of the coil coiling 53f of portion, the 53f of lens mount 53, be provided with and focus on drive coil 15.In addition, follow the tracks of drive coil 16,16, be installed in installation portion 53d, 53d and focus on the right flank among Figure 10 of drive coil 65,65.And then first drive magnet 63,63 and second drive magnet 64,64 are provided with the right side part of clamping main part 53b, through hole 53a, 53a.Therefore, by the magnetic circuit that first drive magnet 63,63 and second drive magnet 64,64 and yoke 58 form, diagram right side scioptics frame 53, through hole 53a, 53a part.That is to say, right side part main part 53b, through hole 53a, 53a, the driving center of driven lens mount 53 is unanimous on the whole with passing through driving mechanism 56.
In having the objective lens device 51 that as above constitutes, if provide electric current to focusing on drive coil 65,65, then lens mount 53 drives on focus direction or vergence direction.In addition, in objective lens device 51, if provide electric current to following the tracks of drive coil 16,16, then lens mount 53 drives on tracking direction.
(the main effect of this example)
As mentioned above, the objective lens device 51 of this example on the basis with effect that above-mentioned objective lens device 1 had, also has following effect.That is to say, in this example, utilization be wound on the driving force that produces on the focusing drive coil 65 on a side the coil coiling 53f of portion, with the coil coiling 53f of portion that is wound on the opposing party on focusing drive coil 65 on the driving force that produces poor, lens mount 53 is in an inclined direction driven.Therefore, do not need to be provided with separately drive coil and the drive magnet that pitch drives is used, lens mount 53 adippings are driven.In addition, owing to focus on drive coil the 65, the 65th, be wound on the coil coiling 53f of portion, the 53f of thin thickness, therefore can guarantee the rigidity of lens mount 53 by focusing on the rigidity of drive coil 65,65.
(variation of example two)
The objective lens device 51 that above-mentioned example two relates to is, the objective lens device of the steel wire hanging type that the support of lens mount 53 by steel wire 4 can be moved to focus direction, tracking direction and vergence direction.But as shown in figure 12, objective lens device also can be, lens mount 73 is by the support of the hinge 74 that is made of elastomeric element, objective lens device 71 that can move to focus direction, tracking direction and vergence direction, so-called hinge support type.
As shown in figure 12, in this objective lens device 71, the main part 73b of lens mount 73 is that being become one by the coil coiling 73f of portion, the 73f that are equivalent to the coil coiling 53f of portion, 53f and coil linking part 53g respectively and coil linking part 73g constitutes.On the tracking direction both end sides of this main part 73b, formed through hole 73a, the 73a of the thorough coil coiling 73f of portion, 73f on focus direction respectively, slightly rectangular in shape.In addition, in main part 73b, subsiding on tangential direction (right direction among Figure 12) between two through hole 73a, the 73a forms, support holding components 77 enter this subside the part and be provided with.In addition, lens mount 73 and support holding components 77 connect by hinge 74.Hinge 74 is, for example, is that the elastomeric element of rubber etc. forms by silicon.And the 73c of lens support sector of lens mount 73 has identical formation with the 53c of lens support sector of said lens frame 53.In addition, in Figure 12, for being marked with prosign with above-mentioned example two identical formations.
Like this, even support the objective lens device 71 of the hinge support type of lens mounts 73, also have the effect identical with above-mentioned objective lens device 51 by hinge 74.
[other examples]
Above-mentioned each example, though be an example of optimum example of the present invention, the present invention is not limited thereto, can implement various distortion in the scope that does not change main idea of the present invention.For example, in above-mentioned each example, in through hole 3a, 23a, 53a, 73a, on all sides, be provided with first drive magnet 13,63 and first 8b of magnet support sector, 28b, 58b.But, can first drive magnet 13,63 be set, and first 8b of magnet support sector, 28b, 58b only are set in through hole 3a, 23a, 53a, 73a on all sides yet.That is to say, also first 8b of magnet support sector, 28b, the 58b that does not install under first drive magnet, 13,63 states can be configured on through hole 3a, 23a, the interior all sides of 53a, 73a.
As mentioned above, focus on drive coil the 15, the 65th, be wound on the periphery of the coil coiling 3f of portion, 23f, 53f, 73f.Therefore, shown in Fig. 1 and Figure 10 etc., focus on the one side and second drive magnet 14,64 on the diagram right side of drive coil 15,65, be configured with closer distance.So,, also can drive lens mount 3,23,53,73 with the sensitivity of regulation even on the interior all sides that focus on drive coil 15,65, only dispose under the situation of first 8b of magnet support sector, 28b, 58b.
In addition, in through hole 3a, 23a, 53a, 73a, do not dispose on all sides under the situation of first drive magnet 13,63, can form smaller through hole 3a, 23a, 53a, 73a.Therefore, under the state of guaranteeing the coil coiling 3f of portion, 23f, 53f, 73f thickness when focus direction is observed, the profile that can dwindle the coil coiling 3f of portion, 23f, 53f, 73f.Consequently, even do not change the size of lens mount 3,23,53,73, also can increase the thickness that when focus direction is observed, focuses on drive coil 15,65.That is to say, can increase the number of turn that focuses on drive coil 15,65.Therefore, can drive lens mount 3,23,53,73 with better sensitivity.In addition, by the number of turn (by increasing thickness) that increase to focus on drive coil 15,65, the intensity of the coil coiling 3f of portion, 23f, 53f, 73f is strengthened, and can further be suppressed at the distortion that produces on the lens mount 3,23,53,73 and distortion such as crooked.
Claims (4)
1. objective lens device, be provided with object lens, support these object lens lens mount, with the driving mechanism that this lens mount is driven to tracking direction and focus direction at least, it is characterized in that, above-mentioned driving mechanism has: the drive magnet that is used to make the said lens frame to drive to tracking direction and focus direction at least, be used to make the focusing drive coil of said lens frame, and be used to make the tracking drive coil of said lens frame to the tracking direction driving to the focus direction driving;
The said lens frame has: formed the through hole that on focus direction, runs through and the main part of the coil coiling portion of the above-mentioned focusing drive coil of reeling, and and lens support sectors that form, support above-mentioned object lens outstanding to the direction that intersects vertically with focus direction and tracking direction from this main part;
On the tracking direction both sides of this lens support sector, be provided with above-mentioned drive magnet;
Above-mentioned tracking drive coil and above-mentioned drive magnet, with direction that focus direction and tracking direction intersect vertically on relative.
2. objective lens device as claimed in claim 1 is characterized in that, said through hole is to run through above-mentioned coil coiling portion and form, and said focusing drive coil is reeled along above-mentioned coil coiling portion's periphery.
3. objective lens device as claimed in claim 1, it is characterized in that, two above-mentioned coil coiling portions on said lens mount, have been formed, utilization be wound on the driving force that produces on the above-mentioned focusing drive coil in a side the above-mentioned coil coiling portion, with the above-mentioned coil coiling portion that is wound on the opposing party on above-mentioned focusing drive coil on the driving force that produces poor, the said lens frame is in an inclined direction driven.
4. objective lens device as claimed in claim 2, it is characterized in that, two above-mentioned coil coiling portions on said lens mount, have been formed, utilization be wound on the driving force that produces on the above-mentioned focusing drive coil in a side the above-mentioned coil coiling portion, with the above-mentioned coil coiling portion that is wound on the opposing party on above-mentioned focusing drive coil on the driving force that produces poor, the said lens frame is in an inclined direction driven.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005258873 | 2005-09-07 | ||
| JP2005258873A JP2007073132A (en) | 2005-09-07 | 2005-09-07 | Objective lens driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1929003A true CN1929003A (en) | 2007-03-14 |
| CN100449619C CN100449619C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101215862A Expired - Fee Related CN100449619C (en) | 2005-09-07 | 2006-08-23 | Object lens drive device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2007073132A (en) |
| KR (1) | KR100804630B1 (en) |
| CN (1) | CN100449619C (en) |
| TW (1) | TW200713250A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219019A (en) * | 2012-01-20 | 2013-07-24 | 日立视听媒体股份有限公司 | Optical pickup |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3137255B2 (en) * | 1995-07-21 | 2001-02-19 | 船井電機株式会社 | Optical pickup device |
| JPH11191231A (en) * | 1997-12-26 | 1999-07-13 | Nhk Spring Co Ltd | Objective lens actuator |
| JP2000020984A (en) * | 1998-07-03 | 2000-01-21 | Toshiba Corp | Optical head device, and disk recording or reproducing apparatus |
| US6587283B2 (en) * | 2000-03-29 | 2003-07-01 | Matsushita Electric Industrial Co., Ltd. | Optical-component-integrated optical pickup |
| CN1153193C (en) * | 2002-01-29 | 2004-06-09 | 清华大学 | Multi-dimension object lens driver for optical head of optical disk |
| KR20030085725A (en) * | 2002-05-01 | 2003-11-07 | 삼성전자주식회사 | Objective lens driving apparatus for optical pickup |
| KR100472477B1 (en) * | 2002-09-02 | 2005-03-10 | 삼성전자주식회사 | Optical pickup actuator and optical pickup apparatus employing the same and optical disk drive apparatus employing the same |
| KR100522232B1 (en) * | 2003-12-24 | 2005-10-17 | 엘지전자 주식회사 | Optical pick-up actuator of slim type |
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2005
- 2005-09-07 JP JP2005258873A patent/JP2007073132A/en active Pending
-
2006
- 2006-07-18 KR KR1020060066965A patent/KR100804630B1/en not_active IP Right Cessation
- 2006-08-23 CN CNB2006101215862A patent/CN100449619C/en not_active Expired - Fee Related
- 2006-08-25 TW TW095131231A patent/TW200713250A/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219019A (en) * | 2012-01-20 | 2013-07-24 | 日立视听媒体股份有限公司 | Optical pickup |
| CN103219019B (en) * | 2012-01-20 | 2016-02-03 | 日立视听媒体股份有限公司 | Light picker |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070028215A (en) | 2007-03-12 |
| TWI318401B (en) | 2009-12-11 |
| JP2007073132A (en) | 2007-03-22 |
| CN100449619C (en) | 2009-01-07 |
| KR100804630B1 (en) | 2008-02-20 |
| TW200713250A (en) | 2007-04-01 |
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