CN1310226C - Objective lens drive device and optical head device provided therewith - Google Patents
Objective lens drive device and optical head device provided therewith Download PDFInfo
- Publication number
- CN1310226C CN1310226C CNB2004100114441A CN200410011444A CN1310226C CN 1310226 C CN1310226 C CN 1310226C CN B2004100114441 A CNB2004100114441 A CN B2004100114441A CN 200410011444 A CN200410011444 A CN 200410011444A CN 1310226 C CN1310226 C CN 1310226C
- Authority
- CN
- China
- Prior art keywords
- pitch drives
- coil
- magnet
- lens carrier
- magnetized
- 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 description 5
- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims 1
- 239000000725 suspension Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 37
- 239000002184 metal Substances 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000005755 formation reaction Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
In an objective lens drive apparatus 1 in which a lens holder 3 holding an objective lens 2 is supported movably by six wires 4, a tilt drive mechanism 12 drives the lens holder 3 in the tilt Ti direction is constituted of one tilt drive coil 13 mounted on the lens holder 3, and one tilt drive magnet 14 which is fixed to a holding part 6c of a yoke 6 so as to oppose to the tilt drive coil and in which a plane opposing to the tilt drive coil 13 is polarized to four poles, and magnetized. In an objective lens drive device of a wire suspension type provided with the tilt drive mechanism, constitution in which constitution of a tilt drive mechanism is simplified and the device can be miniaturized can be provided.
Description
Technical field
The present invention relates to the objective lens device of so-called metal wire mounted model and has its optical-head apparatus.
Background technology
As the optical-head apparatus of the record of the optical recording disk that is used for CD and DVD etc., regeneration etc., known have a kind of optical-head apparatus, has the objective lens device of so-called metal wire mounted model, and this device has: object lens; The lens carrier that keeps object lens; The fixation side member that movably lens carrier is supported with many wires; The focus tracking driving mechanism that lens carrier is driven to focus direction and tracking direction; The tilt drive mechanism that the lens carrier adipping is driven.
In the objective lens device that this optical-head apparatus is used,, use the tilt drive mechanism (for example, with reference to patent documentation 1,2) that constitutes by 1 couple (2) pitch drives magnet with 1 pitch drives coil configured separate as tilt drive mechanism.
As tilt drive mechanism, also make 1 pair of pitch drives coil and 1 pair of tilt drive mechanism (for example, with reference to patent documentation 3,4) that pitch drives magnet configured separate constitutes again.
[patent documentation 1] Jap.P. spy opens the 2003-303432 communique
[patent documentation 2] Jap.P. spy opens the 2003-272201 communique
[patent documentation 3] Jap.P. spy opens the 2003-196871 communique
[patent documentation 4] Jap.P. spy opens the 2003-85798 communique
In recent years, in optical-head apparatus, in order to be equipped in the notebook-sized personal computer and therefore the claimed apparatus integral miniaturization, also requires to constitute the objective lens device miniaturization of optical-head apparatus.
But, in the objective lens device of in the past band tilt drive mechanism, owing to need be provided with the state that separates to 1 pair of pitch drives magnet of major general, so be difficult to make equipment miniaturization.Owing to 1 pair of pitch drives magnet is set installation cost is increased again.
Summary of the invention
The objective of the invention is to, the also structure of the miniaturization of implement device that simplifies the structure that can make tilt drive mechanism is provided in the objective lens device of the metal wire mounted model with tilt drive mechanism.
In order to address the above problem, in objective lens device of the present invention, have: object lens; The lens carrier that keeps these object lens; The fixation side member that movably this lens carrier is supported with many wires; The focus tracking driving mechanism that described lens carrier is driven to focus direction and tracking direction; The tilt drive mechanism that described lens carrier adipping is driven, it is characterized in that, described tilt drive mechanism, by the either side that is installed in described lens carrier and described fixation side member, and be configured in the pitch drives coil at 1 place and be installed in the opposite side of described lens carrier and described fixation side member, and the pitch drives magnet that is configured in 1 place relative with described pitch drives coil constitutes, described object lens are maintained at the distolateral of described lens carrier, it is opposite with described object lens that described tilt drive mechanism is configured in, another of described lens carrier is distolateral, the described pitch drives magnet of described tilt drive mechanism and the side in the described pitch drives coil are installed on the described lens carrier through an elastic component, constitute the snubber assembly of the synchronous vibration that suppresses lens carrier thus.
Many wires among the present invention are not limited to common pole shape, also can use tabular plates such as thin plate.That is, it is circular that cross sectional shape is not limited to, also rectangle.
Among the present invention, preferably, described pitch drives magnet is made of 1 magnet that is configured in the position relative with described pitch drives coil.Again, being configured in the pitch drives magnet at 1 place, is to make incorporate member with being configured in locational, the magnetized a plurality of magnet of one pole relative with described pitch drives coil, perhaps also can make the structure near the shape configuration.
Among the present invention, preferably, described pitch drives coil is made of 1 coil that is configured in the position relative with described pitch drives magnet.Again, described pitch drives coil, except constituting by 1 coil, also can by be configured in the position relative with described pitch drives magnet, being reeled connects into mutual rightabout 2 coils and constitutes.Again, a plurality of coils that can also connect into mutual equidirectional by being reeled constitute.Described pitch drives coil is being connected into rightabout 2 occasions that coil constitutes mutually by reeling, and described pitch drives magnet can adopt the structure that only is magnetized into 2 utmost points.In the occasion that a plurality of coils that described pitch drives coil is connected into mutual equidirectional by reeling constitute, the pattern of wants of described pitch drives magnet is the state with 4 magnetized portion, does not need the pitch drives coil is wound into reverse direction.
Among the present invention, described pitch drives coil, preferably will with the opposite face of described pitch drives magnet, be wound into the state of rectangle with longitudinal edge portion and cross edge, described pitch drives magnet, with the opposite face of described pitch drives coil on, have and utilize 4 magnetized portion that are magnetized into 4 utmost points with the described longitudinal edge portion branch polar curve split pole parallel with cross edge, and on these 4 magnetized portion, coiling direction along described pitch drives coil alternately is magnetized into the N utmost point and the S utmost point, described longitudinal edge portion and cross edge are configured on 2 magnetized portion in described 4 magnetized portion and relative state.Adopt such structure,, do not need so that the state of 1 pair of pitch drives magnet configured separate is provided with, can only realize tilt drive mechanism with 1 pitch drives magnet for 1 pitch drives coil.
Among the present invention, described pitch drives coil, has the cross edge that forms with the tracking direction parallel shape that drives described lens carrier, and, described pitch drives magnet, have the N utmost point and the S utmost point that on the focus direction that drives described lens carrier, are magnetized, the both sides of the described cross edge of the described pitch drives coil on the tracking direction that drives described lens carrier, on described pitch drives magnet and described pitch drives coil, can rightabout power take place relativity ground on the focus direction that drives described lens carrier.Adopt such structure, use pitch drives coil that is configured in 1 place and the pitch drives magnet that is configured in 1 place, described lens carrier adipping is driven.
In foregoing invention, described pitch drives coil, 1 coil that is wound into the rectangle with longitudinal edge portion and cross edge by the opposite face with described pitch drives magnet constitutes, described pitch drives magnet, with the opposite face of described pitch drives coil on, have and utilize 4 magnetized portion that are magnetized into 4 utmost points with the described longitudinal edge portion branch polar curve split pole parallel with described cross edge, the magnetized portion of the described pitch drives magnet of the both sides of the described cross edge of described pitch drives coil, be magnetized to the state that on the focus direction that described lens carrier is driven, becomes opposite polarity, to described 1 coil electricity the time, both sides in the described cross edge of described pitch drives coil, on described pitch drives magnet and described pitch drives coil, rightabout power takes place in relativity ground on the focus direction that drives described lens carrier.This occasion, the described cross edge of pitch drives coil preferably is configured to make the branch polar curve parallel with the longitudinal edge portion of pitch drives magnet to be in middle position on the tracking direction.Adopt such structure, use 1 pitch drives coil and the pitch drives magnet that is configured in 1 place, described lens carrier adipping is driven.This occasion, the pitch drives magnet with 4 magnetized portion both can make the structure of 1 magnet, also can make the state of 4 magnet configuration at 1 place.
In foregoing invention, described pitch drives magnet, with the opposite face of described pitch drives coil on, have 2 magnetized portion utilizing the branch polar curve split pole parallel to be magnetized into 2 utmost points with described cross edge, described pitch drives coil, with be wound into the opposite face of described pitch drives magnet on have described cross edge 2 coils, be configured in side by side on the tracking direction that drives described lens carrier, and, be interconnected into the state that flows through rightabout electric current in described cross edge with described 2 coils of the magnetized portion that is equipped on homopolarity.Adopt such structure, owing on the described cross edge of described 2 coils, flow through rightabout electric current respectively, so on the described cross edge separately of described 2 coils, on described pitch drives magnet and described 2 pitch drives coils, rightabout power takes place in opposability ground on the focus direction that drives described lens carrier.
In foregoing invention, described pitch drives magnet, with the opposite face of described pitch drives coil on, have and utilize 4 magnetized portion that are magnetized into 4 utmost points with the described longitudinal edge portion branch polar curve split pole parallel with described cross edge, described pitch drives coil, with be wound into the opposite face of described pitch drives magnet on have 2 coils of the rectangle of longitudinal edge portion and described cross edge, be configured in side by side on the described tracking direction, and, on the magnetized portion of utilizing the branch polar curve split pole parallel with the longitudinal edge portion of described pitch drives coil, set described 2 coils respectively, and be interconnected into the state that flows through the electric current of equidirectional in cross edge with described 2 coils, the magnetized portion of the described pitch drives magnet on the cross edge of described 2 coils also can be magnetized to the structure that becomes opposite polarity on the focus direction that drives described lens carrier.Such structure, when described 2 coils are switched on, in the both sides of the tracking direction that drives described lens carrier, on described pitch drives magnet and described pitch drives coil, can rightabout power take place relativity ground on the focus direction that drives described lens carrier.In addition, between the described tracking direction of described 2 coils, also can be provided with the 3rd coil.This occasion, the cross edge of the 3rd coil is configured to make the branch polar curve parallel with the described longitudinal edge portion in the pitch drives magnet to be in middle position on the described tracking direction, and, connect into the state that flows through with the electric current of the cross edge equidirectional of described 2 coils.
In the present invention, preferably, described object lens are maintained at the distolateral of described lens carrier, described tilt drive mechanism, and another that is configured in described lens carrier is distolateral.Like this, when object lens and tilt drive mechanism are configured in the two ends of objective lens device, owing to can suitably keep the balance of objective lens device, so can carry out stable focus control, tracking Control.
In the present invention, preferably, on described lens carrier, also constitute the snubber assembly that the synchronous vibration of this lens carrier is suppressed usefulness.Such occasion, preferably, this snubber assembly is made of the elastic component of being installed on the described lens carrier and the described pitch drives coil or the pitch drives magnet that are installed on this elastic component.Adopt such structure, use the constitutional detail of tilt drive mechanism, the synchronous vibration of energy absorption lens support.
In the present invention, preferably, described pitch drives coil is installed in for example described lens carrier side.If pitch drives coil and pitch drives magnet are compared,,, can make the lightweight of lens carrier side so compare with the situation that pitch drives magnet is carried on lens carrier because a side of pitch drives coil is lighter.Its result, in the occasion that constitutes tilt drive mechanism, the reduction of energy mortifier mirror drive characteristic.Again, in this occasion, by the metal wire of described lens carrier supporting usefulness, can be to the pitch drives coil power supply.
Objective lens device of the present invention can be used for optical-head apparatus.
In the present invention, owing to only constitute tilt drive mechanism with pitch drives coil that is configured in 1 place and the pitch drives magnet that is configured in 1 place, so, also realize the miniaturization of objective lens device easily even carried tilt drive mechanism.Again, constituting the occasion of pitch drives coil or pitch drives magnet with 1 magnet, owing to can reduce the part number, so can also reduce the cost of optical-head apparatus the miniaturization except realizing.
Description of drawings
Fig. 1 (A), (B) are respectively the vertical view and the side views of the objective lens device of expression the present invention one example.
Fig. 2 (A), (B), (C) are respectively vertical view, the side view of lens carrier of expression objective lens device shown in Figure 1 and the front view of seeing from the pitch drives coil sides.
Fig. 3 (A), (B) are respectively front view and the side views that expression is used for the pitch drives magnet of objective lens device shown in Figure 1.
Fig. 4 is the configuration relation of the pitch drives coil of objective lens device of the present invention and pitch drives magnet is seen in expression from the pitch drives coil sides a key diagram.
Fig. 5 (A), (B) are respectively the front view and the side views of the pitch drives magnet of another example of expression the present invention.
To be expression see the key diagram of the configuration relation of the pitch drives coil of objective lens device of another form of the present invention and pitch drives magnet from the pitch drives coil sides to Fig. 6.
Fig. 7 (A), (B) are respectively the front view and the side views of the lens carrier in the objective lens device of expression the present invention another example.
Fig. 8 is the key diagram of the configuration relation of expression pitch drives coil of another form of the present invention and pitch drives magnet.
Fig. 9 is the key diagram of the configuration relation of expression pitch drives coil of another form of the present invention and pitch drives magnet.
Embodiment
Below, with reference to accompanying drawing example of the present invention is described.
Fig. 1 (A), (B) are respectively the vertical view and the side views of the objective lens device of expression the present invention one example.Fig. 2 (A), (B), (C) are respectively vertical view, the side view of lens carrier of expression objective lens device shown in Figure 1 and the front view of seeing from the pitch drives coil sides.Fig. 3 (A), (B) are respectively front view and the side views that expression is used for the pitch drives magnet of objective lens device shown in Figure 1.
Among Fig. 1, be applicable to objective lens device 1 of the present invention, it is to have the optical system of regulation, the optical recording disk of CD or DVD etc. is being carried out the device that uses in the optical-head apparatus of information record and information regeneration.For the structure of the device frame of optical-head apparatus etc., owing to can use known structure, its explanation of Therefore, omited, and objective lens device 1 has: object lens 2; The lens carrier 3 that keeps object lens 2; With 6 wires 4 focus direction (direction shown in the arrow Fo), tracking direction (direction shown in the arrow Tr), and vergence direction (direction shown in the arrow Ti) on the fixation side member 7 that movably lens carrier 3 supported; The focus tracking driving mechanism 8 that lens carrier 3 is driven to focus direction Fo and tracking direction Tr; The tilt drive mechanism 12 that lens carrier 3 adipping Ti are driven.
6 wires 4 also use as the power supply metal wire of powering to focusing drive coil 9 described later, tracking drive coil 10 and pitch drives coil 13 respectively.Therefore, the front of metal wire 4, with relaying substrate 17 solderings of the tracking direction both sides that are fixed on lens carrier 3 fixing.On the other hand, the base end side of metal wire 4 is welding with the wiring graph of printed base plate 16 on the back side that is installed in bracket supports member 5.On printed base plate 16, fixing to flexible base plate 18 solderings of the power supply usefulness that will power to metal wire 4 again.
Focus tracking driving mechanism 8, by carry 1 on the lens carrier 3 focus on that 9,2 of drive coils are followed the tracks of drive coil 10 and the maintaining part 6b that cuts from the bottom surface sections 6a of yoke 6 on a pair of focus tracking drive magnet 11 that kept constitute, be configured in the substantial middle portion of lens carrier 3.Focus on drive coil 9 and be wound into rectangle, three lateral dominances of its outer circumferential side are fixed on interior all sides of the barrel 3c of lens carrier 3 with method such as bonding.Follow the tracks of drive coil 10, constitute, be attached on the outside on 1 remaining except above-mentioned 3 limits that focus on drive coil 9 limit by 2 planar coils.
A pair of focus tracking drive magnet 11, the relative inboard of the barrel 3c of lens carrier 3 focuses on 1 limit of drive coil 9 and follows the tracks of on two side positions of drive coil 10 shapes and relatively disposing in clamping.
[structure of tilt drive mechanism]
In this form, tilt drive mechanism 12 is by carrying in 1 the pitch drives coil 13 of lens carrier 3 sides and 1 pitch drives magnet, 14 formations of fixing from the maintaining part 6c side (fixation side member one side) that the bottom surface sections 6a of yoke 6 cuts.
Here, with the direction of both sides' quadrature of focus direction Fo and tracking direction Tr on, as one of lens carrier 3 distolateral occasion, tilt drive mechanism 12 is configured in another of the lens carrier 3 of extension 3a opposition side distolateral at the extension 3a that object lens 2 are kept.In other words, tilt drive mechanism 12 is configured in the base end side of metal wire 4 among Fig. 1.
In this form, pitch drives coil 13 is the planar coils that are wound into rectangle, with the opposite face of pitch drives magnet 14 on, have 13a of longitudinal edge portion (focus direction) and cross edge 13b (tracking direction), and be attached to the outside surface 3d last (with reference to Fig. 2) of another distolateral main part 3c of said lens support 3.In this example, pitch drives coil 13, being wound into the 13a of longitudinal edge portion becomes the oblong-shaped that minor face, cross edge 13b become long limit.
Pitch drives magnet 14 forms as shown in Figure 3 with the flat rectangular shape of diagram longitudinal direction as short brink (focus direction), is fixed on the maintaining part 6c, makes opposite face 14a relative with pitch drives coil 13.Maintaining part 6c is configured in the outer circumferential side of the main part 3c of lens carrier 3, cuts and forms from the bottom surface sections 6a of yoke 6.
[configuration relation of pitch drives coil and pitch drives magnet]
Fig. 4 is the configuration relation of the pitch drives coil of objective lens device of the present invention and pitch drives magnet is seen in expression from the pitch drives coil sides a key diagram.
As shown in Figure 4, pitch drives coil 13 and pitch drives magnet 14, the state that is almost parallel with the short leg 14b (focus direction) of the 13a of longitudinal edge portion (focus direction) of pitch drives coil 13 and the longitudinal direction of pitch drives magnet 14 is relatively disposing.
Here, pitch drives magnet 14 has 4 magnetized portion, utilize with the branch polar curve 14c of the parallel formation of the 13a of longitudinal edge portion of pitch drives coil 13 with the branch polar curve 14d of the parallel formation of cross edge 13b (tracking direction), split pole becomes 4 utmost points and is magnetized.That is, pitch drives magnet 14 is become 4 utmost points of the 1st magnetized portion the 141, the 2nd magnetized portion the 142, the 3rd magnetized portion the 143, the 4th magnetized portion 144 by split pole and is magnetized.Again, from the 1st magnetized portion 141 to the 4th magnetized portion 144, the N utmost point, the S utmost point alternately magnetize along the coiling direction X of pitch drives coil 13.For example, the 1st magnetized portion 141 is magnetized into the S utmost point, the 2nd magnetized portion 142 is magnetized into the N utmost point, the 3rd magnetized portion 143 is magnetized into the S utmost point, the 4th magnetized portion 144 is magnetized into the N utmost point.
In addition, the 13a of longitudinal edge portion of pitch drives coil 13 and cross edge 13b from the 1st magnetized portion 141 to the 4th magnetized portion 144, are relatively disposing with state and pitch drives magnet 14 on 2 magnetized portion.That is, in Fig. 4, for example, the 13a of longitudinal edge portion on diagram right side, with across the 1st magnetized portion 141 that is magnetized into the S utmost point and be magnetized into the state on the 4th magnetized portion 144 of the N utmost point, the shape of promptly dividing polar curve 14d to become middle position is relatively disposing.Again, the cross edge 13b of diagram upside, with across the 1st magnetized portion 141 that is magnetized into the S utmost point and be magnetized into the state on the 2nd magnetized portion 142 of the N utmost point, the shape of promptly dividing polar curve 14c to become middle position is relatively disposing.Equally, the 13a of longitudinal edge portion in diagram left side is relatively disposing with the state on the 2nd magnetized portion 142 and the 3rd magnetized portion 143.The cross edge 13b of diagram downside is relatively disposing with the state on the 3rd magnetized portion 143 and the 4th magnetized portion 144.In addition, as shown in Figure 4, the profile of pitch drives coil 13 is littler than the profile of pitch drives magnet 14.
[explanation of pitch drives action]
Utilization has the pitch drives coil 13 of above the sort of relation configuration and the tilt drive mechanism 12 of pitch drives magnet 14, as described below, lens carrier 3 adipping Ti (with reference to Fig. 1) is driven.
Among Fig. 4, when pitch drives coil 13 is supplied with anticlockwise electric current, on tracking direction, be positioned at the cross edge 13b right side, relative with the 1st magnetized portion 141 and the cross edge 13b relative with the 4th magnetized portion 144, generation is to the power of diagram below (focus direction is downward), on tracking direction, be positioned at the cross edge 13b left side, relative with the 2nd magnetized portion 142 and the cross edge 13b relative, the power to diagram top (focus direction makes progress) takes place with the 3rd magnetized portion 143.Therefore, these power average out, and lens carrier 3 is carried out pitch drives to the diagram clockwise direction.
In contrast, when pitch drives coil 13 is supplied with clockwise electric current, on cross edge 13b, take place and above-mentioned rightabout power, lens carrier 3 is counterclockwise carried out pitch drives to diagram.
In addition, pitch drives coil 13 can be wound into rectangle, but in order suitably to carry out above-mentioned pitch drives, the length that preferably is wound into cross edge 13b becomes long, that the 13a of longitudinal edge portion is different with the length of cross edge 13b rectangles.
[effect of this example]
As mentioned above, in the objective lens device 1 of this form, pitch drives magnet 14, have utilize with the branch polar curve 14c of the parallel formation of the 13a of longitudinal edge portion of pitch drives coil 13 with become 4 utmost points and magnetized the 1st magnetized portion 141～the 4th magnetized portion 144 with the branch polar curve 14d of the parallel formation of cross edge 13b by split pole, and, from the 1st magnetized portion 141 to the 4th magnetized portion 144, the N utmost point, the S utmost point alternately magnetize along the coiling direction X of pitch drives coil 13.In addition, the 13a of longitudinal edge portion of pitch drives coil 13 and cross edge 13b, the state with on 2 magnetized portion from the 1st magnetized portion 141 to the 4th magnetized portion 144 is relatively disposing with pitch drives magnet 14.Therefore, do not need to be provided with the such pair of angled drive magnet in both sides that is configured in lens carrier, can only realize tilt drive mechanism 12 with 1 pitch drives magnet 14.
Again, the pitch drives coil 13 that utilization is made of planar coil and constitute tilt drive mechanism 12 by the pitch drives magnet 14 that flat magnet constitutes, in the objective lens device 1 of metal wire mounted model, since with pitch drives magnet 14 be configured in dead space promptly, between lens carrier 3 and the bracket supports member 5, so even lift-launch tilt drive mechanism 12 also can make objective lens device 1 miniaturization.
In this form, focus tracking driving mechanism 8 is configured in the substantial middle portion of lens carrier 3.Therefore, can make the centre of gravity place of focus tracking driving mechanism 8 consistent with the centre of gravity place of objective lens device 1.Again, with the direction of both sides' quadrature of focus direction Fo and tracking direction Tr on lens carrier 3 one distolateral, object lens 2 are remained on the extension 3a, and at another distolateral tilt drive mechanism 12 that disposing of lens carrier 3.Therefore, just the pitch drives coil 13 that constitutes tilt drive mechanism 12 counterweight can be used as, the balance of objective lens device 1 can be suitably kept.Its result just can carry out stable focus control, tracking Control.
Again, as mentioned above because distolateral at lens carrier 3, object lens 2 are remained on that extension 3a goes up and tilt drive mechanism 12 are configured in another of lens carrier 3 distolateral, so can suppress by the influence of the heat of tilt drive mechanism 12 generations for optical system.
In addition, because tilt drive mechanism 12 is configured in the base end side of metal wire 4, so the pitch drives coil 13 can reduce adipping Ti and drive the time and the offset of pitch drives magnet 14.Therefore, just can carry out appropriate tilt drives.
Again, in this form, because the pitch drives coils 13 that weight ratio pitch drives magnet 14 is light carry on lens carrier 3, so the increase of the weight of lens carrier 3 can be suppressed to Min..Its result, the reduction of the characteristic of energy mortifier mirror drive 1.
[other example]
Above-mentioned example is an example of the preferable form of the present invention, but is not limited thereto, and can carry out various distortion in the scope that does not change aim of the present invention.For example, the pitch drives coil 13 of above-mentioned example and the opposite face of pitch drives magnet 14, be to constitute with 1 planar coil that is wound into rectangle with the 13a of longitudinal edge portion and cross edge 13b, and as shown in Figure 6, also can be set up in parallel the track side and always constitute by the planar coil that will be divided into 2.To be expression see the key diagram of the configuration relation of the pitch drives coil of objective lens device of another form of the present invention and pitch drives magnet from the pitch drives coil sides to Fig. 6.This occasion, 2 pitch drives coils 130,131 that make planar coil, by the pitch drives coil 130 that will illustrate the left side along Y direction (clockwise direction) reel the back, the pitch drives coil 131 that will illustrate the right side continuously reels along Z direction (counterclockwise) and forms.Promptly, the pitch drives coil 130 in left side is reeled round about with the pitch drives coil 131 on right side, therefore, when in the pitch drives coil 130 in left side, flowing through clockwise electric current, in the pitch drives coil 131 on right side, just flow through anticlockwise electric current.Again, these pitch drives coils 130,131, same with above-mentioned example, being wound into separately the 130a of longitudinal edge portion, 131a becomes the rectangle that minor face, cross edge 130b separately, 131b become long limit.
Fig. 5 (A), (B) are respectively the front view and the side views of the pitch drives magnet of another example of expression the present invention.
Pitch drives magnet 140 forms as shown in Figure 5 with the longitudinal direction of Fig. 5 flat rectangular shape as short brink, and opposite face 140a and 2 pitch drives coils 130,131 relatively are fixed on from the maintaining part 6c that bottom surface sections 6a cut of yoke 6.2 pitch drives coils 130,131 and pitch drives magnet 140, the short leg 140b that is configured to the longitudinal direction of separately the 130a of longitudinal edge portion, the 131a of 2 pitch drives coils 130,131 and pitch drives magnet 140 relatively becomes the state of almost parallel.
Here, pitch drives magnet 140 has 2 magnetized portion that are magnetized, and utilizes and the cross edge 130b separately of 2 pitch drives coils 130,131, the branch polar curve 140d of the parallel formation of 131b, is become 2 utmost points by split pole.That is, pitch drives magnet 140 is become the 1st magnetized portion the 145, the 2nd magnetized portion 146 by split pole and is magnetized.For example, the occasion of this form, the 1st magnetized portion 145 is magnetized to the S utmost point, and the 2nd magnetized portion 146 is magnetized to the N utmost point.
2 pitch drives coils 130,131, being mutually reels in reverse direction forms, separately the 130a of longitudinal edge portion, the 131a of pitch drives coil 130,131 are relatively disposing with state and pitch drives magnet 140 on the 1st magnetized portion 145 and the 2nd magnetized portion 146.That is, in Fig. 6, the 130a of longitudinal edge portion, the 131a of each pitch drives coil 130,131 are relatively to dispose across the 1st magnetized portion 145 that is magnetized into the S utmost point and the state that is magnetized on the 2nd magnetized portion 146 of the N utmost point.Again, in Fig. 6, cross edge 130b, the 131b of the diagram upside of each pitch drives coil 130,131 are relatively disposing with the 1st magnetized portion 145 that is magnetized into the S utmost point.In addition, cross edge 130b, the 131b of diagram downside are relatively disposing with the 2nd magnetized portion 146 that is magnetized into the N utmost point.In addition, the profile of 2 the pitch drives coils 130,131 that are set up in parallel as shown in Figure 6, forms littler than the profile of pitch drives magnet 140.
In contrast, when the pitch drives coil 130 in diagram left side is supplied with anticlockwise electric current, on the pitch drives coil 131 on diagram right side, supply with clockwise electric current.At this moment, the last generation of cross edge 130b, 131b of pitch drives coil 130,131 separately and above-mentioned rightabout power are counterclockwise carried out pitch drives with lens carrier to diagram.
In example shown in Figure 3, pitch drives magnet 14 is that integrally formed member split pole has been magnetized into 4 utmost points, but also can be with the magnet after the one pole magnetization, and 4 constitute the drive magnet 14 that is magnetized into 4 utmost points with being combined into one.Again, also can be with magnet, 41 positions that closely is configured in objective lens device 1 after the one pole magnetization.
In above-mentioned example, pitch drives coil 13 is installed in lens carrier 3 sides, but also can be installed in yoke 6 sides (side of fixation side member 7), relatively dispose with pitch drives magnet 14.This occasion, because pitch drives magnet 14 is installed on the lens carrier 3, the position changeable of pitch drives magnet 14 is moving, and overlapping with lens carrier 3, therefore, though the difficult balance that obtains lens carrier 3, but owing to do not need to power, so can constitute with 4 wires 4 to lens carrier 3.Thereby device is oversimplified, can be made cost decreases.
In addition, shown in Fig. 7 (A), (B),, also can use pitch drives magnet 14 to constitute the snubber assembly 19 of the synchronous vibration of absorption lens support 3 for lens carrier 3.This occasion, preferably, will be as the pitch drives magnet 14 of the constitutional detail of tilt drive mechanism 12, the elastic component 20 by chloroprene rubber etc. is fixed on the lens carrier 3.In addition, be provided with the occasion of pitch drives coil 13, can pitch drives coil 13 be fixed on the lens carrier 3, constitute snubber assembly by the elastic component 20 of chloroprene rubber etc. in lens carrier 3 sides.
Again, in example shown in Figure 6, the planar coil that is divided into 2 is the ground formation of reeling mutually in the other direction, but is divided into 2 planar coil, the coil that also can use equidirectional to reel.Fig. 8 is the figure that the example of 2 pitch drives coils 150,151 of reeling to equidirectional is used in expression, in this occasion, as pitch drives magnet 14, uses the magnet shown in Fig. 3 (A), (B).Among Fig. 8, such as already described when the pitch drives coil 150 in diagram left side is supplied with clockwise electric current, the power below diagram takes place in pitch drives coil 150.At this moment, also the pitch drives coil 151 on diagram right side is supplied with clockwise electric current, owing to become opposite with the situation of pitch drives coil 150 with the polarity of 2 cross edge opposing inclined drive magnets 14 of pitch drives coil 151, so the power above diagram takes place in the pitch drives coil 151 on diagram right side, can make lens carrier 3 carry out pitch drives to counter clockwise direction.When pitch drives coil 150,151 is supplied with anticlockwise electric current, carry out opposite action with above-mentioned example, can make lens carrier 3 carry out pitch drives to clockwise direction.
The example of Fig. 8 be to use the example of 2 planar coils that equidirectional reels, and the number of the planar coil that equidirectional is reeled can make more than 3 also.Fig. 9 is the figure that has disposed the 3rd coil in the example of Fig. 8 between 2 coils.That is, Fig. 9 is the figure that the example of 3 pitch drives coils 160,161,162 is used in expression, and this occasion as pitch drives magnet 14, is used the magnet shown in Fig. 3 (A), (B).Among Fig. 9, as the pitch drives coil 161 of the central authorities of the 3rd coil, the branch polar curve 14c that is configured to form on the focus direction becomes the state of middle position, again, 2 the pitch drives coils 160,162 that disposed in the tracking direction both sides, it is equidistant to divide polar curve 14c to be configured to relatively.
Therefore, same with the situation of Fig. 8 when pitch drives coil 160 is supplied with clockwise electric current among Fig. 9, the power below diagram takes place in pitch drives coil 160.At this moment, also pitch drives coil 162 is supplied with clockwise electric current, but since with the polarity of 2 cross edge opposing inclined drive magnets 14 of pitch drives coil 162 become opposite with the situation of pitch drives coil 160, so power above illustrating takes place in pitch drives coil 162.Again, pitch drives coil 161, owing to become identical with the situation of pitch drives coil 160 with half the polarity of 2 cross edge opposing inclined drive magnets 14 of pitch drives coil 161 of left side, become identical with half the polarity of 2 cross edge opposing inclined drive magnets 14 of pitch drives coil 161 of right side with the situation of pitch drives coil 162, so downward power takes place in the left side at pitch drives coil 161, and on the right side power upwards takes place.Therefore, this occasion, also same with example shown in Figure 8, can make lens carrier 3 carry out pitch drives to counter clockwise direction.When pitch drives coil 160,161,162 is supplied with anticlockwise electric current, carry out the action opposite with above-mentioned example, can make lens carrier 3 carry out pitch drives to clockwise direction.
Again, in example shown in Figure 3, pitch drives magnet 14 is formed rectangular shape, as long as but the branch polar curve 14c that utilizes opposite face 14a and the parallel formation of the 13a of longitudinal edge portion of pitch drives coil 13 at least with the branch polar curve 14d of the parallel formation of cross edge 13b, split pole becomes 4 utmost points and is magnetized, then also can not form rectangular shape, and form for example flat cylindrical shape.Again, the magnetization of pitch drives magnet 14 is not limited to 4 utmost points, also can be magnetized into multipolely lens carrier 3 is carried out pitch drives.
In addition, as long as the tilt drive mechanism 12 of above-mentioned example is configured on two side positions of disc radial of lens carrier 3, just can carry out the pitch drives of tangential direction to disc.
In addition, in order to get rid of the effect of magnetic influence that focus on drive coil 9 by 14 pairs of pitch drives magnet reliably, also can adopt the wall thickness of the main part 3c of the lens carrier 3 that will attach pitch drives coil 13 to thicken and make to focus on drive coil 9 to be arranged on structure between pitch drives coil 13 and the focusing drive coil 9 away from the structure of pitch drives magnet 14 and with yoke.
[utilizability on the industry]
In objective lens device of the present invention, owing to only using the pitch drives coil that is configured in 1 place and joining The pitch drives magnet of putting at 1 place consists of tilt drive mechanism, so even carried tilt drive mechanism Miniaturization that also can the encumbrance mirror drive. Therefore, has the gold that does not carry tilt drive mechanism In the optical-head apparatus of the objective lens device of genus line mounted model, having can be with this objective lens device former state ground Be replaced as the advantage that objective lens device of the present invention consists of optical-head apparatus etc. Again, with 1 magnet Consist of the occasion of pitch drives magnet, can realize miniaturization and cost degradation.
Claims (14)
1, a kind of objective lens device has: object lens; The lens carrier that keeps these object lens; The fixation side member that movably this lens carrier is supported with many wires; The focus tracking driving mechanism that described lens carrier is driven to focus direction and tracking direction; Tilt drive mechanism with described lens carrier adipping drives is characterized in that,
Described tilt drive mechanism, the pitch drives coil that comprises the either side that is installed in described lens carrier and described fixation side member and be configured in 1 place and the opposite side that is installed in described lens carrier and described fixation side member also are configured in the pitch drives magnet at 1 place relative with described pitch drives coil
Described object lens are maintained at the distolateral of described lens carrier, described tilt drive mechanism is configured in that opposite with described object lens, described lens carrier another is distolateral, the described pitch drives magnet of described tilt drive mechanism and the side in the described pitch drives coil are installed on the described lens carrier through an elastic component, constitute the snubber assembly of the synchronous vibration that suppresses lens carrier thus.
2, objective lens device as claimed in claim 1 is characterized in that, is configured in the pitch drives magnet at described 1 place, constitutes by being configured in locational 1 magnet relative with described pitch drives coil.
3, objective lens device as claimed in claim 1, it is characterized in that, being configured in the pitch drives magnet at described 1 place, is that a plurality of magnet that will be configured in after locational, the one pole relative with described pitch drives coil magnetize make incorporate member, perhaps disposes near shape.
4, objective lens device as claimed in claim 1 is characterized in that, is configured in the pitch drives coil at described 1 place, constitutes by being configured in locational 1 coil relative with described pitch drives magnet.
5, objective lens device as claimed in claim 1 is characterized in that, is configured in the pitch drives coil at described 1 place, constitutes by being configured in locational a plurality of coils relative with described pitch drives magnet.
6, objective lens device as claimed in claim 1 is characterized in that,
Described pitch drives coil is, will with the opposite face of described pitch drives magnet, be wound into the state of rectangle with longitudinal edge portion and cross edge,
Described pitch drives magnet, with the opposite face of described pitch drives coil on have to utilize and be magnetized into 4 magnetized portion of 4 utmost points with the described longitudinal edge portion branch polar curve split pole parallel with cross edge, and on these 4 magnetized portion, replace earth magnetism and change into the N utmost point and the S utmost point,
Described longitudinal edge portion and cross edge are configured on 2 magnetized portion in described 4 magnetized portion and relative state.
7, objective lens device as claimed in claim 6 is characterized in that, the described cross edge of described pitch drives coil is configured to make the branch polar curve parallel with the longitudinal edge portion of described pitch drives magnet to be in the middle position of described tracking direction.
8, objective lens device as claimed in claim 1 is characterized in that,
Described pitch drives coil, have and the tracking direction parallel shape of the described lens carrier of driving and 2 cross edge that on focus direction, form side by side, and, described pitch drives magnet, have the N utmost point and the S utmost point that on the focus direction that drives described lens carrier, are magnetized, relatively be equipped with described 2 cross edge respectively with this N utmost point and the S utmost point
By on described 2 cross edge, flowing through rightabout electric current, the both sides of the described cross edge of the described pitch drives coil on the tracking direction that drives lens carrier, by in described pitch drives magnet and described pitch drives coil, rightabout power on the focus direction of the described lens carrier of generation driving relatively can drive described lens carrier adipping.
9, objective lens device as claimed in claim 8 is characterized in that,
Described pitch drives coil is made of 1 coil that will be wound into the rectangle with longitudinal edge portion and described cross edge with the opposite face of described pitch drives magnet,
Described pitch drives magnet, with the opposite face of described pitch drives coil on have 4 magnetized portion, utilize with the described longitudinal edge portion branch polar curve split pole parallel and be magnetized into 4 utmost points with described cross edge,
The magnetized portion of the described pitch drives magnet of the described cross edge both sides of described pitch drives coil is magnetized to the state that becomes opposite polarity on the focus direction that described lens carrier is driven,
To described 1 coil electricity the time, in the both sides of the described cross edge of described pitch drives coil, on described pitch drives magnet and described pitch drives coil, rightabout power takes place in relativity ground on the focus direction that drives described lens carrier.
10, objective lens device as claimed in claim 8 is characterized in that,
Described pitch drives magnet, with the opposite face of described pitch drives coil on have 2 magnetized portion, utilize the branch polar curve split pole parallel to be magnetized into 2 utmost points with described cross edge,
Described pitch drives coil, with be wound into the opposite face of described pitch drives magnet on have described cross edge 2 coils, be configured in side by side on the tracking direction that drives described lens carrier, and, be interconnected into the state that flows through rightabout electric current in described cross edge with described 2 coils of the magnetized portion that is equipped on homopolarity
By on the described cross edge of described 2 coils, flowing through rightabout electric current respectively, on the described cross edge separately of described 2 coils, in described pitch drives magnet and described 2 pitch drives coils, rightabout power takes place in relativity ground on the focus direction that drives described lens carrier.
11, objective lens device as claimed in claim 8 is characterized in that,
Described pitch drives magnet, with the opposite face of described pitch drives coil on have 4 magnetized portion, utilize with the described longitudinal edge portion branch polar curve split pole parallel and be magnetized into 4 utmost points with described cross edge,
Described pitch drives coil, with be wound into the opposite face of described pitch drives magnet on have 2 coils of the rectangle of described longitudinal edge portion and described cross edge state, be configured in side by side on the described tracking direction, and, utilize the branch polar curve parallel with the longitudinal edge portion of described pitch drives coil by the magnetized portion of split pole on, set described 2 coils respectively, be interconnected into the state that flows through the electric current of equidirectional in cross edge with described 2 coils
The magnetized portion of the described pitch drives magnet on the described cross edge of described 2 coils, being magnetized on the focus direction that drives described lens carrier becomes opposite polarity.
12, objective lens device as claimed in claim 11 is characterized in that,
Between the described tracking direction of described 2 coils, be provided with the 3rd coil that the opposite face with described pitch drives magnet is wound into rectangle with longitudinal edge portion and described cross edge,
The described cross edge of the 3rd coil, be configured to make the branch polar curve parallel to be in middle position on the described tracking direction with the described longitudinal edge portion in the described pitch drives magnet, and, connect into the state that flows through with the electric current of the cross edge equidirectional of described 2 coils.
13, objective lens device as claimed in claim 1 is characterized in that, described pitch drives coil is installed in the distolateral of described lens carrier.
14, a kind of optical-head apparatus is characterized in that, has each objective lens device of putting down in writing in the claim 1～13.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003429027 | 2003-12-25 | ||
| JP2003429027 | 2003-12-25 | ||
| JP2004223848 | 2004-07-30 | ||
| JP2004223848 | 2004-07-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1645489A CN1645489A (en) | 2005-07-27 |
| CN1310226C true CN1310226C (en) | 2007-04-11 |
Family
ID=34889279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100114441A Expired - Fee Related CN1310226C (en) | 2003-12-25 | 2004-12-24 | Objective lens drive device and optical head device provided therewith |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1310226C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335613A (en) * | 2000-07-14 | 2002-02-13 | Tdk株式会社 | Objective lens driving apparatus using in optical pick device |
| CN1381841A (en) * | 2001-04-12 | 2002-11-27 | 株式会社三协精机制作所 | Head device |
| CN1397938A (en) * | 2001-07-12 | 2003-02-19 | Tdk株式会社 | Lens driving gear used in optical pick-up device |
| CN1450536A (en) * | 2002-04-11 | 2003-10-22 | 三星电机株式会社 | Triaxial driving apparatus of optical pickup actuator |
-
2004
- 2004-12-24 CN CNB2004100114441A patent/CN1310226C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335613A (en) * | 2000-07-14 | 2002-02-13 | Tdk株式会社 | Objective lens driving apparatus using in optical pick device |
| CN1381841A (en) * | 2001-04-12 | 2002-11-27 | 株式会社三协精机制作所 | Head device |
| CN1397938A (en) * | 2001-07-12 | 2003-02-19 | Tdk株式会社 | Lens driving gear used in optical pick-up device |
| CN1450536A (en) * | 2002-04-11 | 2003-10-22 | 三星电机株式会社 | Triaxial driving apparatus of optical pickup actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1645489A (en) | 2005-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1220185C (en) | Lens position controlling unit for optical pick device | |
| CN1729614A (en) | Magnetic levitation apparatus | |
| CN1314019C (en) | Optical pick-up device actuator | |
| CN1194342C (en) | Actuator of optical pick-up device | |
| CN1335613A (en) | Objective lens driving apparatus using in optical pick device | |
| CN1302471C (en) | High-sensitivity pickup actuator for disc drive | |
| CN100345194C (en) | 3d actuator for optical disc system | |
| CN1290927A (en) | Optic pick-up device and its support method | |
| CN1310226C (en) | Objective lens drive device and optical head device provided therewith | |
| CN1265367C (en) | Objective lens driving apparatus | |
| CN1677518A (en) | Objective lens drive device and optical head device | |
| CN1577525A (en) | Optical head and optical disk driver | |
| CN1278316C (en) | Optical pickup and disc drive apparatus | |
| CN1441414A (en) | Optical pick-up head actuator and optical recording/replaying device using it | |
| CN100339896C (en) | Objective lens drive device and optical head device provided with the same | |
| CN1645491A (en) | Slim type optical pick-up actuator | |
| CN1835098A (en) | Optical head actuator | |
| CN1609966A (en) | Supporting member for an optical pick-up actuator, and optical pick-up actuator and optical recording/reproducing apparatus using the same | |
| CN1848256A (en) | Optical pickup actuator and optical recording and/or reproducing apparatus having the same | |
| CN1178214C (en) | Optical pick-up device and its manufacture | |
| TW200407875A (en) | Objective lens driving appwus for optical pickup | |
| CN1220187C (en) | Optical component driver and CD device | |
| CN1395239A (en) | Objective lens drive device and disk drive device containing the same | |
| CN1314022C (en) | Coil rotation preventing structure for optical pick-up actuator | |
| CN1684162A (en) | Optical pickup and disc drive device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NIDEC SANKYO CORP. Free format text: FORMER NAME OR ADDRESS: SANKYO SEIKI MFG. SEISAKUSHO K.K. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Japan, Suwa, Nagano Patentee after: Sankyo Seiki Seisakusho KK Address before: Japan, Suwa, Nagano Patentee before: Sankyo Seiki Manufacturing Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070411 Termination date: 20100125 |