CN1519824A - Adjuster for light picking up device - Google Patents
Adjuster for light picking up device Download PDFInfo
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- CN1519824A CN1519824A CNA031150209A CN03115020A CN1519824A CN 1519824 A CN1519824 A CN 1519824A CN A031150209 A CNA031150209 A CN A031150209A CN 03115020 A CN03115020 A CN 03115020A CN 1519824 A CN1519824 A CN 1519824A
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- regulator
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Abstract
The invented adjuster following action of focusing coil can automatically compensate angle of inclination generated when optical disk rotates. The adjuster includes objective carrier, first and second permanent magnets, focusing coil, tracing coils as well as first and second coils. The objective carrier fixes lens, which focuses light beam onto recording surface of optical disk. First and second permanent magnets are positioned at left side and right side of objective carrier. The focusing coil wrapped on objective carrier receives magnetic force in direction perpendicular to the objective carrier. Tracing coils are located at sides of objective carrier opposite to first and second permanent magnets respectively. First and second coils inside tracing coils are connected to focusing coil electrically. The invention can automatically compensate angle of inclination generated when optical disk rotates, making optical disk play/record data correctly.
Description
(1) technical field
The present invention relates to a kind of light picker regulator, refer in particular to and when tilting, when focusing is driven, can set upright a kind of light picker regulator of angle change automatically the trend (run-out) of walking about outward because of the machinery of CD.
(2) background technology
Recently, along with developing rapidly of CD, be developed out the light picker product of a variety of optical disc recording/reproducings.Can make from amplifying the light beam of thing lens light harvesting, hot spot points (spot) such as the face vibrations of the CD that produces because of the rotation of CD and off-centre, the amplification thing lens driver and the optical Pickup device of the channel center of tracking CD are formed together.So amplify the thing lens driver and be referred to as light picker regulator (Actuator), drive for the action of amplifying thing lens focus (Focusing) and tracking (Tracking).
Above-mentioned focusing (Focusing) action be for make be positioned at from the CD channel to focus from the hot spot point (spot) that amplifies the light beam that the thing lens penetrate within and drive up and down.Above-mentioned tracking simultaneously (Tracking) action be for make be positioned at from the CD channel to focus from the hot spot point (spot) that amplifies the light beam that the thing lens penetrate within and about drive.
Fig. 1 is the generalized schematic about the light picker governor arrangements of prior art.
As shown in Figure 1, the light beam light harvesting that laser diode light source is penetrated to the optical disc data record surface amplification thing lens 3 and above-mentioned amplification thing lens 3 be embedded into the objective carrier 1 of scope and above-mentioned objective carrier 1 about the permanet magnet of being put separately 6 Hes of maintenance certain distance, be positioned at the back side of above-mentioned permanet magnet 6, the yoke cover (YOKE) 7 that in above-mentioned permanet magnet 6, is provided with and be right against above-mentioned permanet magnet 6 and put for the leakage that prevents magnetic, be wrapped in above-mentioned objective carrier 1 exterior circumferential focusing coil 4 with constitute with tracking coil 5 that direction that above-mentioned focusing coil 4 twines becomes vertical direction to put.
The action of light picker regulator that possesses said structure is as follows: the light picker regulator is for the focusing action of amplifying thing lens 3 and follow the trail of action, utilize above-mentioned be placed with the above-mentioned objective carrier 1 that amplifies thing lens 3 about about the magnetic force of the permanet magnet 6 of putting, side-to-side movement.The driving force of such light picker regulator is by in above-mentioned permanet magnet 6 and above-mentioned yoke cover (YOKE) the 7 formed magnetic field spaces, gives above-mentioned tracking coil 5 and above-mentioned focusing coil 4 guide current, is generated lorentz apparatus power by the lefft-hand rule of Fleming.Import electric current for above-mentioned tracking coil 5, make above-mentioned amplification thing lens 3 side-to-side movements.Import electric current for above-mentioned focusing coil 4, thereby allow above-mentioned amplification thing lens 3, the orbital direction that makes it to move up and down.Among the figure, staccato device (damperholder) the 10th is in order the common seismic wave peak that reduces regulator to use.
Fig. 2 is the synoptic diagram that reads the CD-ROM drive mechanical effect of CD about existing.
As shown in Figure 2, by pallet 22 and wrench 21 and fixing CD CD 20 by the motor of axle (spindle motor) 30 rotations, light picker regulator 25 is put in CD 20 bottoms, maintain a certain distance radiation source by amplifying the thing lens, come record/played data by folded light beam.In addition, above-mentioned light beam is to be kept by machine plate (deck) 24, and machine plate (deck) the 24th in order to prevent vibrations or to impact, keeps stable status, supports with exhaust silencer.Among the figure, baseplate part 100 is substrates of machine plate (deck).
Fig. 3 a, 3b and 3c are used for illustrating that light picker regulator when trend (run-out) and mechanical fault of walking about outward of CD focuses on the figure of the Lian Guanxing of action and tilting action.
Shown in Fig. 3 a, when CD 20 rotated under neutral condition, the amplification thing lens of fixedly putting on the objective carrier of regulator were radiated at light on the CD equably.
Shown in Fig. 3 b, CD 20 that record/played data is to be bent upwards by the mechanical type trend (run-out) of walking about outward during than neutral condition (3a), according to the focusing action of regulator, amplifies the thing lens and can move up the situation of run-off the straight angle-θ degree.
Shown in Fig. 3 c,, amplify the thing lens and can move down the situation of run-off the straight angle+θ degree according to the focusing action of regulator.
As mentioned above, CD 20 under normal condition with to a certain degree inclination the time (θ ,+θ degree), only depend on to focus on that to follow the trail of action be can't accurate recording/reproduction.Therefore certain inclination also to be done with the angular dimension that produces in the amplification thing lens position of light picker regulator.This is referred to as the angle of inclination adjustment.
Fig. 4 a and Fig. 4 b are the concept maps of setting upright for the pitch angle that CD is described.
Shown in Fig. 4 a, when walk about the outward trend or the mechanical reasons such as bending of CD of CD, the error problem at run-off the straight angle, shown in Fig. 4 b, special swing coil makes the light picker regulator hold the conceptual schematic view of required degree of tilt on the light picker regulator.
Then, for the revisal at common pitch angle, the permanet magnet and the electric current that form magnetic field have been installed have especially been imported coil portion.
The generation at pitch angle can cause the error of data reproduction and record, and the two-forty of CD and high density be also because of the recording/reproducing data that is difficult at pitch angle, is a big event to the regulator requirement so overcome the pitch angle.
But so to have disposed the method for coil actuator be accurately to grasp the angle of inclination in the generation that overcomes the pitch angle by other approach, and independent coil actuator can increase the expense of system and the burden when producing because increase.
(3) summary of the invention
The present invention is in order to solve the defective of above-mentioned prior art, provide with the focusing coil coil that distributes in upright arrangement and put, change a kind of light picker regulator that comes to adjust automatically and promptly its pitch angle with the action that focuses on and be its purpose in the inside of the tracking coil that twines.
The object of the present invention is achieved like this:
A kind of light picker regulator comprises:
Objective carrier: fixing amplify that the thing lens use, and can light harvesting on the optical disc data record surface;
The 1st permanet magnet and the 2nd permanet magnet: be positioned at the left and right sides of described objective carrier separately, each produces magnetic field;
Focusing coil: be wrapped in described objective carrier around, make described objective carrier vertical direction be subjected to magnetic force;
Tracking coil: the lateral edge both sides at local both sides, an edge of the relative described objective carrier of described the 1st permanet magnet and the relative described object lens fixture of above-mentioned the 2nd permanet magnet make described objective carrier be subjected to the magnetite magnetic force of horizontal direction;
The 1st coil and the 2nd coil: be placed in electrically connecting of described tracking coil inboard with described focusing coil.
At this, above-mentioned the 1st coil is put the inboard, outside at the tracking coil of a side of above-mentioned objective carrier, above-mentioned the 2nd coil is that above-mentioned the 1st coil is put the inboard, tracking coil side on the relative other side of above-mentioned objective carrier of tracking coil level, above-mentioned the 1st coil and the 2nd coil are that above-mentioned focusing coil is influenced by magnetic force and when focused on by above-below direction magnetic force, utilize the vertical up and down magnetic force in magnetic field, set upright the pitch angle automatically.
The present invention is that the pitch angle for revisal tracking coil inside embeds a coil, when the pitch angle is set upright, along with the action of focusing coil, utilizes magnetite magnetic field, the pitch angle of CD can be set upright.
Effect of the present invention:
As above-mentioned detailed description, light picker regulator of the present invention is adjusted the pitch angle revisal automatically by focusing coil and linearly aligned coil, can accurately promptly ensure the revisal at pitch angle.
In addition, coil of the present invention places tracking coil inside, can be utilized as to focus on action and follow the tracks of the employed magnetic field of action, so needn't settle permanet magnet in addition on regulator, reaches the effect that saves production cost.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is the simple synoptic diagram of light picker governor arrangements about prior art;
Fig. 2 follows the synoptic diagram that reads the CD-ROM drive mechanical effect of data of optical disk according to existing technology;
Fig. 3 a, 3b and 3c are the figure for the continuity of walk about outward light picker is regulated when trend (run-out) and mechanical fault focusing action and the tilting action that CD is described;
Fig. 4 a and Fig. 4 b are in order to illustrate that CD sets upright the figure of the notion of degree of tilt;
Fig. 5 is the generalized schematic about the structure of regulator among the present invention;
Fig. 6 is a sectional view of seeing Fig. 5 from the A direction;
Fig. 7 is the magnetic force synoptic diagram that explanation coil of the present invention is subjected in magnetic field;
Fig. 8 is the curve of showing about the disc tilt angle of the regulator among the present invention.
The symbol description of major part in the accompanying drawing:
40: staccato device 41: objective carrier
43: amplify thing lens 44. focusing coils
45: tracking coil 46: permanet magnet
47: yoke cover 48: pedestal
49: linear spring 50: coil
(5) embodiment
Below, describe embodiments of the invention in detail with reference to accompanying drawing.
Fig. 5 is the brief description figure about controller structure among the present invention.
As shown in Figure 5, the light beam of laser diode light source is bundled to the amplification thing lens 43 of optical disc data record surface; With the objective carrier 41 that above-mentioned amplification thing lens 43 are embedded; With certain distance separately and be positioned at the 1st and the 2nd permanet magnet 46 of above-mentioned objective carrier 41 left and right sides separately; Be positioned at the above-mentioned the 1st and the 2nd permanet magnet 46 back sides, in order to prevent to reveal the yoke cover (YOKE) 47 of magnetics from the 1st and the 2nd permanet magnet 46; And between the above-mentioned the 1st and the 2nd permanet magnet 46, and be wound in the focusing coil 44 of the exterior circumferential of above-mentioned objective carrier 41; With perpendicular to focusing coil 44 and be wrapped in tracking coil 45 on the above-mentioned objective carrier 41; On Fig. 5, can't see in addition, put in above-mentioned tracking coil 45 inside, for the 1st and the 2nd coil 50 (see figure 6)s and the linear spring 49 of compensating for tilt angle (Tilting angle) constitutes.
Above-mentioned the 1st coil 50 is to be positioned at above-mentioned first or second permanet magnet 46 to face outer circumferential side tracking coil 45 inside on the above-mentioned objective carrier 41 that connects, and another one the 2nd coil 50 is the inside that is positioned at the tracking coil 45 on the other side.
The action of regulator that possesses said structure is as follows:
The light picker regulator is the focusing action of above-mentioned amplification thing lens 43 and follows the trail of action, the objective carrier 41 of putting above-mentioned amplification thing lens 43, moves up and down.Above-mentioned tracking coil 45 and above-mentioned focusing coil 44 that constitutes in the magnetic field space that the driving force of light picker regulator is made of the above-mentioned the 1st and the 2nd permanet magnet 46 and yoke cover (YOKE) 41 so, the lorentz apparatus power that produces according to the lefft-hand rule of Fleming.
Also have, in order to make amplification thing lens 43 move left and right of above-mentioned light picker regulator, injection current on the above-mentioned tracking coil 45 is in order to move up and down, at above-mentioned focusing coil 44 injection currents.At this moment, above-mentioned tracking coil 45 inside, above-mentioned focusing coil 44 in upright arrangement electrical connections are put the 1st and the 2nd coil 50, along with above-mentioned focusing coil 44 is worked up and down and run-off the straight automatically.
The above-mentioned the 1st and the pitch drives of the 2nd coil 50 be to focus on action and follow the trail of the correction for inclined that action can't be accomplished, this is because the light picker regulator just can the correct data of record/broadcast during perpendicular to the cd side of record/played data, that is, the cd side of light picker regulator and record data/reproduction is vertical could the recoding/reproduction accurate data.
Fig. 6 is the A direction sectional view of above-mentioned Fig. 5, as shown in scheming to go up, the objective carrier 41 that comprises above-mentioned amplification thing lens 43 is twining focusing coil 44 on every side, and lateral edge both sides that are tied with above-mentioned focusing coil 44 distinctly dispose tracking coil 45.In addition, has assigned in order to set upright the pitch angle in the outside in the above-mentioned tracking coil 45, and inside is provided with the 1st, 2 coils 50.
Amplifying the above-mentioned focusing coil 44 that twines on the objective carrier 41 of thing lens 43 present positions among Fig. 5 is benchmark for moving up and down orbital direction, and also injection current on the above-mentioned the 1st and the 2nd coil 50 produces magnetic field, influenced by its magnetic force and understands vertical bank.Therefore the above-mentioned thing lens of the above-mentioned the 1st and the 2nd coil 50 fit over objective carrier 41 both sides, and each only is present in one respectively on the objective carrier 41, influenced by above-mentioned magnetic field magnetic force, is set upright to the angle of inclination of lopsidedness.
As shown in Figure 7, be the center according to the magnetic field of magnetic head with the central part, the intensity in the magnetic field that symmetry up and down reduces is arranged.When focusing increased progressively, the magnetic field intensity by above-mentioned coil 50 bottoms in this magnetic field is big, and was little by the magnetic field intensity on top, so above-mentioned coil 50 is upwards stressed.
This benchmark is that above-mentioned coil 50 is to electrically connect with above-mentioned focusing coil 44, therefore along with the increase and decrease of above-mentioned focusing coil 44 is stressed up and down.
Fig. 8 is the curve map of setting upright about the disc tilt angle of regulator of the present invention.
As shown in Figure 8, walk about according to the bending or the machinery of CD, the run-off the straight angle, above-mentioned focusing coil amplifies thing lens required separation distance for record/played data with focusing on, and the size at its pitch angle can non-linear increase.
The angle of inclination of the regulator of the coil that the present invention is suggested is followed the trail of basically, and rectilinearity tilts.Shown in the curve map, adjust the angle of inclination of CD according to focusing distance.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (3)
1, a kind of light picker regulator is characterized in that comprising:
Objective carrier: fixing amplify that the thing lens use, and can light harvesting on the optical disc data record surface;
The 1st permanet magnet and the 2nd permanet magnet: be positioned at the left and right sides of described objective carrier separately, each produces magnetic field;
Focusing coil: be wrapped in described objective carrier around, make described objective carrier vertical direction be subjected to magnetic force;
Tracking coil: the lateral edge both sides at local both sides, an edge of the relative described objective carrier of described the 1st permanet magnet and the relative described object lens fixture of above-mentioned the 2nd permanet magnet make described objective carrier be subjected to the magnetite magnetic force of horizontal direction;
The 1st coil and the 2nd coil: be placed in electrically connecting of described tracking coil inboard with described focusing coil.
2, light picker regulator as claimed in claim 1, it is characterized in that described the 1st coil puts in the inboard, outside of the tracking coil of a side of described objective carrier, described the 2nd coil is that described the 1st coil is put the inboard, tracking coil side on the relative other side of described objective carrier of tracking coil level.
3, light picker regulator as claimed in claim 1, it is characterized in that described the 1st coil and the 2nd coil are described focusing coils and are subjected to magnetic force and when focusing on action, utilize the vertical up and down magnetic force in this magnetic field to adjust its degree of tilt automatically by magnetic field is vertical up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031150209A CN1519824A (en) | 2003-01-22 | 2003-01-22 | Adjuster for light picking up device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031150209A CN1519824A (en) | 2003-01-22 | 2003-01-22 | Adjuster for light picking up device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1519824A true CN1519824A (en) | 2004-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031150209A Pending CN1519824A (en) | 2003-01-22 | 2003-01-22 | Adjuster for light picking up device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1519824A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735484A (en) * | 2020-12-17 | 2021-04-30 | 中国华录·松下电子信息有限公司 | High-precision objective lens servo tracking device |
-
2003
- 2003-01-22 CN CNA031150209A patent/CN1519824A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735484A (en) * | 2020-12-17 | 2021-04-30 | 中国华录·松下电子信息有限公司 | High-precision objective lens servo tracking device |
| CN112735484B (en) * | 2020-12-17 | 2021-12-21 | 中国华录·松下电子信息有限公司 | High-precision objective lens servo tracking device |
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| WD01 | Invention patent application deemed withdrawn after publication |