CN1147863C - Optical pickup device - Google Patents
Optical pickup deviceInfo
- Publication number
- CN1147863C CN1147863C CNB011163100A CN01116310A CN1147863C CN 1147863 C CN1147863 C CN 1147863C CN B011163100 A CNB011163100 A CN B011163100A CN 01116310 A CN01116310 A CN 01116310A CN 1147863 C CN1147863 C CN 1147863C
- Authority
- CN
- China
- Prior art keywords
- ball seat
- optical
- framework
- yoke
- mirror folder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title abstract description 28
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
Images
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
In the optical head device 1, there are superposed, a ball seat 50, a yoke 2 and a lens holder 3 in this order on the frame 9 that moves along a guide shaft extending in the radial direction of the optical recording disk. A cylindrical part 28 exerted from the lower face of the yoke 2 is inserted in the inserting hole 51 of the ball seat 50. Since the inserting hole 51 is a slot extending in the orthogonal direction to the guide shaft, the yoke 2 can be moved in a direction crossing the guide shaft relative to the ball seat 50. Accordingly, the objective lens 5 can be adjusted in position between the guide shafts. The invention provides an optical head device capable of reproducing and recording signals from/on an optical recording disk under optimum conditions by making the position of an objective lens adjustable on the frame.
Description
The present invention relates to a kind of optical-head apparatus, especially relate to the object lens position adjustment technology on a kind of framework at the last record of optical recording disk (CD), regenerating information.
Shown in Fig. 1 (A), in for the optical-head apparatus that the recorded information on CD disc (CD), the digital video disc CD optical recording disks such as (DVD) is regenerated, 2 guide shafts 101,102 that radially have at optical recording disk 100 extend in parallel, and the framework 9 that loads object lens 5 moves along guide shaft 101,102.
As Fig. 8 (A) (B) shown in, the order of pressing ball seat 50, yoke 2 and mirror folder 3 on this framework 9 is overlapping, object lens 5 are clamped by mirror folder 3.Have cylindrical portion 28 to protrude on the bottom surface sections 22 of yoke 2 downwards, the bottom 231 of the bolster 23 of supporting mirror folder 3 is pressed into the inboard of being fixed in this cylindrical portion 28.
When the ball seat 50 by said structure was loaded in yoke 2 on the framework 9, as shown in Figure 8, framework 9 formed the part supporting part 98 that is made of recess relatively, disposes yoke 2 simultaneously, make ball seat 50 following 52 with these part supporting part 98 butts.Therefore as shown by arrow D, the slip of the part supporting part 98 of following 52 relative frameworks 9 by making ball seat 50 just can change the inclination angle of yoke 2, thus the inclination angle of adjustment object lens 5.
In the optical-head apparatus 2 of structure like this, although ball seat 50 can tilt at framework 9, can not move at framework 9 upper edge in-planes (direction shown in the arrow E), in addition, because yoke 2 constitutes one with ball seat 50, can not on framework 9, do moving of in-plane.Thereby object lens 5 can not be done moving of in-plane on framework 9.
For this reason, if the correct position of the object lens 5 between the guide shaft 101,102 shown in Fig. 1 (A), then shown in Fig. 6 (A), when 3 light beams that form when being regenerated by CD generate the trail-and-error signal, object lens 5 are positioned under the state in all fields state of optical recording disk 100 or the periphery field that object lens 5 are positioned at optical recording disk 100, position relation between the magnetic track of luminous point and recording disc does not have big difference, so the deterioration of trail-and-error signal can not take place.But, in case deviation takes place in the position of the object lens 5 between guide shaft 101,102, then shown in Fig. 6 (B), when object lens 5 are between the state in the state in interior all fields of optical recording disk 100 and periphery field, very big difference takes place in the position relation of the magnetic track of luminous point and recording disc, make the trail-and-error Signal Degrade, and traditional optical-head apparatus 1 also can't be adjusted the position of object lens 5 in the face of such problem.
Therefore, taked to make the countermeasure of each part etc., but this countermeasure rises manufacturing cost with high precision in the past.In addition, even improved the dimensional accuracy of part, but the influence of assembly error etc. can make the signal that can't regenerate and write down under the top condition from the optical recording disk.
For this reason, the present invention is in order to address the above problem, by adjusting the object lens position on the framework, provide a kind of under top condition renewable and record from the optical-head apparatus of the signal of optical recording disk (CD).
In order to address the above problem, optical-head apparatus of the present invention has: clamp the mirror folder of object lens, movably support this mirror folder make its mirror folder supporting mass that moves in tracking direction and focusing direction, under the state that is supporting this mirror folder by the inclination angle adjustment that is configured in mirror folder supporting mass bottom surface with ball seat at the driven framework of disk radial, it is characterized in that, between aforementioned ball seat and aforementioned mirror folder supporting mass, formation connecting portion, this connecting portion make relatively, and the relative position of the in-plane of the aforementioned ball seat of this mirror folder supporting mass can change.
In the present invention, aforesaid frame can by as a pair of guide shaft that extends in parallel with disk radial guide at disk radial.
In the present invention, aforementioned connecting portion can make the aforementioned relatively ball seat of mirror folder supporting mass as described above, moves towards the direction vertical with the driving direction of aforesaid frame, for example vertical with aforementioned guide shaft direction.
In the present invention, framework is by the ball seat supporting mirror folder supporting mass of inclination angle adjustment usefulness, although the framework rotation relatively of this ball seat can not be moved at framework upper edge in-plane.But in the present invention, because the relative ball seat of mirror folder supporting mass can relatively move at in-plane, press from both sides the position of supporting mass on framework so can adjust mirror.Such as, on this framework, can be at the direction vertical (direction vertical) moving lens folder supporting mass with guide shaft with the driving direction of this framework.Therefore, the position of the object lens of being clamped by mirror is also adjusted with the mirror folder supporting mass direction (direction vertical with guide shaft) vertical with the driving direction of this framework in the framework upper edge.Thus, in assembling during optical-head apparatus, such as position (object lens) the occurrence positions deviation of the folder of the mirror between the guide shaft supporting mass time, can adjust this.When so 3 light beams that form during by regeneration CD generate the trail-and-error signal, no matter object lens are to be positioned at the state in all fields of optical recording disk or the state in periphery field, can both correctly generate trail-and-error signal etc., regeneration and record are from the signal of optical recording disk under top condition.
In the present invention, on the aforementioned connecting portion, preferably limit its mirror folder supporting mass moving on the aforementioned ball seat direction parallel (direction parallel) with aforementioned guide shaft with the driving direction of aforesaid frame.Owing to limited towards the moving of useless direction, just can easily adjust the position of object lens.
On aforementioned connecting portion of the present invention, can adopt the structure that on aforementioned ball seat, forms patchhole, above-mentioned patchhole can make the projection of for example protruding towards the below from the bottom of aforementioned mirror folder supporting mass slowly embed.
In the present invention, be preferably, aforementioned patchhole is formed by it, in the direction vertical with the driving direction of aforesaid frame, for example, the upwardly extending elongated hole shape in the side vertical with aforementioned guide shaft, make described mirror folder supporting mass to move towards the direction vertical, on the other hand, make its mobile being suppressed towards the direction parallel with aforementioned guide shaft relative to aforementioned ball seat with described guide shaft.
The simple declaration of accompanying drawing
Fig. 1 (A) (B) represents the vertical view of position relation of optical recording disk in the optical-head apparatus and guide shaft and the vertical view of optical-head apparatus respectively.
Fig. 2 (A) (B) represents the vertical view of the framework of carrier mirror drive in the optical-head apparatus shown in Figure 1 and various optical elements respectively, and on this framework the amplification stereogram of the yoke supporting part by ball seat supporting yoke.
Fig. 3 (A) (B) (C) represents to use vertical view, side view and the longitudinal section that has disposed mirror folder state in the optical-head apparatus of the present invention in the yoke inboard respectively.
Fig. 4 (A) (B) (C) represents vertical view, vertical view and the longitudinal section of yoke shown in Figure 3 respectively.
Fig. 5 (A) (B) respectively expression use the vertical view and the side view of the ball seat that disposes between the bottom surface sections of yoke in the optical-head apparatus of the present invention and the framework.
Fig. 6 (A) (B) represents that respectively object lens between the guide shaft are in the key diagram of position relation of the magnetic track of the optical recording disk under the correct status and luminous point and the key diagram that position that magnetic track that the object lens between the guide shaft are in the optical recording disk the deviation state is under put with it concerns.
Fig. 7 (A) (B) represents to use the vertical view that is disposed at other ball seat between yoke bottom surface sections and the framework in the optical-head apparatus of the present invention.
Fig. 8 (A) (B) represents respectively in traditional optical-head apparatus, by ball seat yoke is carried on the side view and the longitudinal section of the state on the framework in the inboard configuration of yoke mirror folder back.
Fig. 9 is the vertical view of ball seat shown in Figure 8.
Following with reference to description of drawings example of the present invention.But because the basic structure of the form of following explanation is identical with traditional technology, so the part of correspondence is with identical symbol.
The one-piece construction of optical-head apparatus
Fig. 1 (A) (B) represents the vertical view of position relation of optical recording disk in the optical-head apparatus and guide shaft and the vertical view of optical-head apparatus respectively.Fig. 2 (A) (B) represents the vertical view of the framework of carrier mirror drive in the optical-head apparatus shown in Figure 1 and various optical elements respectively, and on this framework the amplification stereogram of the yoke supporting part by ball seat supporting yoke.
Fig. 3 (A) (B) (C) represents to use vertical view, side view and the longitudinal section that has disposed mirror folder state in the optical-head apparatus of the present invention in the yoke inboard respectively.Fig. 4 (A) (B) (C) represents vertical view, vertical view and the longitudinal section of yoke shown in Figure 3 respectively.
Fig. 5 (A) (B) respectively expression use the vertical view and the side view of the ball seat that disposes between the bottom surface sections of yoke in the optical-head apparatus of the present invention and the framework.
Shown in Fig. 1 (A), 2 guide shafts 101,102 with the radial parallel of optical recording disk 100 of configuration on the light sensation device 1, the framework 9 that carries object lens 5 can move along these guide shafts 101,102.On framework 9, also carried in addition the objective lens device 1A of object lens 5 along tracking direction and the driving of focusing direction.
Shown in Fig. 1 (B), employed objective lens device 1A is that the axle slip is rotary-type in this optical-head apparatus 1.Objective lens device 1A presss from both sides 3 etc. by cup-shaped metallic yoke 2 and the plastics system mirror that is contained in these yoke 2 inboards and constitutes, and these component load-bearings are on plastic framework 9.Yoke 2 in this form is for being clipped in object lens 5 its inboard and its mirror that is configured on the framework 9 being pressed from both sides supporting mass.
The structure of framework 9
In Fig. 1 (B) and Fig. 2 (A), framework 9 is made of the part supporting part 91 of carrying yoke 2 and the connecting portion 92,93 that extends from its both sides etc., and its plan view shape roughly is "＜" shape.In 2 connecting portions 92,93, at 2 guide holes 94 of head formation of connecting portion 92, this guide hole can be by being directed to framework 9 guide shaft 101 of disk radial (direction shown in the arrow C).On the other hand, the head at connecting portion 93 is formed with recess 96.This leads recess can connect the guide shaft 102 that is subjected to framework 9 is directed to disk radial (direction shown in the arrow C) equally.Thus, framework 9 can and be accepted the recess 96 of guide shaft and moves at disk radial by guide shaft 101,102, guide hole 94.
Shown in Fig. 1 (B), Fig. 3 (A), (B), (C), Fig. 4 (A), (B), (C), yoke 2 has side surface part 21 cylindraceous and bottom surface sections 22, at the central authorities of bottom surface sections 22 pillar 23 on end.
The CD that will load mirror folder 3 is housed between yoke 2 and mirror folder 3 uses object lens 5 along tracking direction (direction of arrow A) mobile tracking driving mechanism and the mobile focusing driving mechanism of edge focusing direction (direction of arrow B).These driving mechanisms are the magnetic drive-type.Such as, follow the tracks of driving mechanism and have by 180 ° interval and be installed in tracking on the outer peripheral face of peripheral plate part 32 of mirror folder 3 with drive coil 71,72.A pair of tracking is installed with permanent magnet 73,74 at the inner peripheral surface of the side surface part 21 of yoke 2 by 180 ° interval in addition.Just can make between drive coil 71,72 and the corresponding permanent magnet 73,74 by the power supply of controlling these drive coils to produce magnetic force, thereby make the angles of mirror folder 3 rotation regulation around column 23.That is, the CD that loads mirror folder 3 is moved along tracking direction with object lens 5.The focusing driving mechanism also is identical structure basically, by the magnetic force that produces between the permanent magnet 63,64 of focusing with drive coil 61,62 and correspondence mirror folder 3 is slided along upright firmly 23 axis direction.
The interior yoke 29 that the cross section is " コ " shape is housed in yoke 2, and focusing drive coil 61,62 and relative with permanent magnet 63,64 is clamped in the end of this yoke 29.
For to being loaded into the power supplies such as each drive coil 61,62,71,72 that mirror presss from both sides 3 sides, with 8 of flexible print wiring boards between mirror folder 3 and yoke 2.The relaxed state frame that flexible print wiring board 8 is the U font in this example presss from both sides between 3 sides and yoke 2 sides at mirror, and this loose part is out of shape with the rotation of mirror folder 3.Power to flexible print wiring board 8 via the flexible print wiring board 82 that is loaded in joint 80, the circuit board 81 on the framework 9 and draws.
The structure of the connecting portion of yoke 2 and ball seat 50.
In the objective lens device 1 of like this structure, the yoke 2 by column 23 supporting mirrors folders 3 has the structure shown in Fig. 3 (A), (B), and it is disposed at by ball seat 50 on the part supporting part 98 of framework 9 (with reference to Fig. 2 (A), (B)).
This ball seat 50 has the shape that following 52 parts that have an area of the disk of arc protrusion are down excised shown in Fig. 5 (A), (B), form patchhole 51 in the central.Formation small embossment 53 on ball seat 50.
Shown in Fig. 3 (A), (B) like that, in the bottom surface sections 22 of yoke 2, the central part of this bottom surface sections 22 is carried out deflashing processing and the cylindrical portion 28 that forms is protruded these cylindrical portion 28 inboard axle fixed orifices that form the bottom 231 that is pressed into vertical columns 23.
In this form, ball seat 50 is to be disposed between yoke 2 and the framework 3 under the state of the patchhole 51 of the bottom of cylindrical portion 28 and column 23 231 insertion ball seats 50.And under this state, preventing rotating hole 27 at the small embossment 53 of ball seat 50 and the bottom surface sections 22 position overlapped formation of yoke 2, the small embossment 53 of ball seat 50 embeds this and prevents in the rotating hole 27.
Like this, under the state in ball seat 50 is overlapped in the bottom surface sections 22 of yoke 2, after yoke 2 being disposed at the part supporting part 98 of framework 9, compress spring 55 in case be screwed shown in Fig. 1 (B), then yoke 2 is compressed by the elasticity that compresses spring 55 and is fixed on the framework 9.
In addition, as long as by the big slightly through hole 991,992 (with reference to Fig. 2 (A)) that on framework 9, forms, formed screw hole 261,262 on the bottom surface sections 22 to yoke 2, just can be fixed in yoke 2 on the framework 9 with not shown screw retention from the below of framework 9.This screw retention position is positioned at the opposition side that compresses spring 55 simultaneously, so as long as adjust the degree of tightening of 2 screws, then following 52 of ball seat 50 become guide surface, yoke 2 tilts as shown by arrow D like that, thereby can be sandwiched in the degree of tilt adjustment (pitch angle adjustment) of the optical axis of the object lens 5 in the mirror folder 3.
When assembling optical-head apparatus 1 as mentioned above, the patchhole 51 that forms on ball seat 50 in this form be along the elongated hole that extends with guide shaft 101,102 vertical direction, and the rotating hole 27 that prevents of yoke 2 sides that embeds the small embossment 53 of ball seat 50 also is the elongated hole along the direction extension vertical with guide shaft 101,102.Therefore, shown in arrow E among Fig. 3 (C) and Fig. 5 (A), forming patchhole 51 and preventing in the scope of rotating hole 27, yoke 2 can relatively move as in-plane towards relative ball seat with the vertical direction of guide shaft 101,102 50.
But, carry out above-mentioned when mobile, the width of the patchhole 51 only cylindrical portion 28 than yoke 2 is big slightly, and the small embossment 53 of ball seat 50 embeds the microscler poroid of yoke 2 and prevents in the rotating hole 27, so yoke 2 relatively ball seat 50 edges and guide shaft 101,102 vertical directions moves, but can not be offset in the direction parallel with guide shaft 101,102.
The effect of this form
As mentioned above, in the optical-head apparatus 1 of this form, between the bottom surface sections 22 of the ball seat 50 at the inclination angle that is used to adjust yoke (object lens 5) on the framework 9 and yoke 2, be used to embed the cylindrical portion 28 protruded towards the below from the bottom surface sections 22 of yoke 2 and column 23 bottom 231 the ball seat side patchhole 51 for along and guide shaft 101, the elongated hole that 102 vertical direction are extended, so just in case guide shaft 101, position (the guide shaft 101 of the yoke 2 between 102, the position of the object lens 5 between 102) deviation takes place, can be with yoke 2 relative ball seats 50 edges and guide shaft 101,102 vertical directions move, thereby adjust guide shaft 101, the position of yoke 2 is a guide shaft 101 between 102, the position of the object lens 5 between 102.When therefore 3 light beams that form when utilizing regeneration CD generate this signal of trail-and-error, shown in Fig. 6 (B), when light spot position perpendicular to the direction generation deviation of guide shaft 101,102 time, just luminous point can be adjusted to the tram shown in Fig. 6 (A) by the position of adjusting object lens 5.Thereby no matter all fields that object lens 5 are positioned at optical recording disk 100 still are can both correctly generate the trail-and-error signal under the state in periphery field.
Other example
Yoke 2 can move in the direction of vertical guide shaft 101,102 at least relative to ball seat 50, then patchhole 51 is not limited to the elongated hole shown in Fig. 5 (A), shown in Fig. 7 (A), can be circular patchhole or the rectangle patchhole 51 bigger than the cylindrical portion 28 of yoke 2 and column 23.
Effect of the present invention
As mentioned above, in optical-head apparatus of the present invention, because its mirror presss from both sides relatively ball seat plane side of supporting mass To relatively move, so the position of capable of regulating mirror folder supporting mass on framework. Can on framework, the mirror folder be propped up Hold body follow the usual practice as, move perpendicular to the direction of framework driving direction. Therefore, be clipped in object lens in the mirror folder The position also can press from both sides supporting mass with mirror, makes accent on the direction vertical with the framework driving direction at framework Whole. Thus, when the assembling optical-head apparatus, in for example folder of the mirror between guide shaft supporting mass position (object lens) When deviation takes place, can adjust this. Therefore, 3 light beams that form when utilizing regeneration CD generate follows During the track rub-out signal, no matter object lens are positioned at the state in all fields or the periphery field of optical recording disk, Can both correctly generate trail-and-error signal etc., can under optimum condition, regenerate, record from optical recording magnetic The signal of dish.
Claims (5)
1. optical-head apparatus, described optical-head apparatus has: clamp the mirror folder of object lens, support the mirror folder supporting mass that this mirror folder makes it move in tracking direction and focusing direction movably, under the state that supports this mirror folder by the inclination angle adjustment that is configured in mirror folder supporting mass bottom surface with ball seat, at the driven framework of disk radial, between the aforementioned ball seat and aforementioned mirror folder supporting mass of described device, constitute connecting portion, it is characterized in that
At described connecting portion, described mirror folder supporting mass can move towards the direction vertical with the driving direction of described framework relative to described ball seat.
2. optical-head apparatus according to claim 1 is characterized in that, the structure of described device is, 3 light beams that form in the time of can be by regeneration CD generate the trail-and-error signal.
3. optical-head apparatus according to claim 1 is characterized in that, at described connecting portion, described mirror folder supporting mass is with respect to described ball seat, is restricted towards the mobile of driving direction of described framework.
4. optical-head apparatus according to claim 1 is characterized in that, is formed with patchhole on described ball seat, and described patchhole can make the projection of protruding from the bottom of described mirror folder supporting mass slowly embed downwards.
5. optical-head apparatus according to claim 4, it is characterized in that, described patchhole is the microscler poroid of the edge direction extension vertical with the driving direction of described framework, by this, described mirror folder supporting mass can be moved towards the direction vertical with the driving direction of described framework relative to described ball seat, simultaneously, can make its mobile being restricted again towards the direction parallel with the driving direction of described framework.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000104273A JP3619422B2 (en) | 2000-04-06 | 2000-04-06 | Optical head device |
| JP104273/2000 | 2000-04-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1320927A CN1320927A (en) | 2001-11-07 |
| CN1147863C true CN1147863C (en) | 2004-04-28 |
Family
ID=18617850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011163100A Expired - Fee Related CN1147863C (en) | 2000-04-06 | 2001-04-05 | Optical pickup device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3619422B2 (en) |
| CN (1) | CN1147863C (en) |
-
2000
- 2000-04-06 JP JP2000104273A patent/JP3619422B2/en not_active Expired - Fee Related
-
2001
- 2001-04-05 CN CNB011163100A patent/CN1147863C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001291247A (en) | 2001-10-19 |
| JP3619422B2 (en) | 2005-02-09 |
| CN1320927A (en) | 2001-11-07 |
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