CN100363990C - Light pick-up driver - Google Patents
Light pick-up driver Download PDFInfo
- Publication number
- CN100363990C CN100363990C CNB031159508A CN03115950A CN100363990C CN 100363990 C CN100363990 C CN 100363990C CN B031159508 A CNB031159508 A CN B031159508A CN 03115950 A CN03115950 A CN 03115950A CN 100363990 C CN100363990 C CN 100363990C
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- coil
- lens
- mentioned
- yoke cover
- focusing
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Abstract
The present invention relates to an optical pickup driver. A coil for inclined operation is arranged in the optical pickup driver to manufacture a driver with thin appearance and miniaturization. The present invention comprises an object lens, a lens support frame, a focus coil, an orbit coil, a coil a main yoke sleeve, a magnet and a yoke sleeve, wherein the object lens focuses light on a compact disk; the lens support frame is used for supporting the object lens; the focus coil is arranged on the inner side of the lens support frame; the orbit coil is arranged on the focus coil; the coil is arranged around an opening region of the inner side of the lens support frame; the main yoke sleeve and the magnet are arranged from the lower part of the lens support frame to the center and the opening region to form a magnetic field; the yoke sleeve is arranged from the upper of the lens support frame to the inside of the coil and the inside of the focus coil.
Description
Technical field
The present invention relates to a kind of optical pick-up actuator, relate in particular to a kind of in the slimming driver with coil configuration in lens carrier inside, and on lens carrier top, use the yoke cover that covers shape to seal, and make tilt operation freely, can manufacture extra-thin optical pick-up actuator.
Background technology
Generally, cd side vibrations and polarization phenomena that the CD rotation can cause, for the light wave that makes object lens focusing can be followed the trail of the CD signal orbit centre, objective lens device need be called optical pick-up actuator with light picker such objective lens device that together moves, and its effect is to make object lens carry out focusing operation and grasp rail operation.Focusing operation is, drives object lens up and down, and the luminous point by object lens is positioned in the focal length on the CD signal track; The extracting rail operation is, about drive object lens, make by the luminous point of object lens and follow the trail of the CD signal orbit centre.
Existing optical pick-up actuator utilizes coil and magnet, and by electric current by coil and the electro permanent magnetic between magnet, up and down, the move left and right object lens, at present, light picker is just trending towards high sensitivity, high driven nature, ultrathin type.
For such optical pick-up actuator, in order to reduce the height of light picker, light path that the light that laser diode is launched forms and optical pick-up actuator are on same plane.At this moment, on the light path that the light that laser diode is launched forms, there are the magnet and the magnetic loops such as focusing coil, track coil of carrying out focusing operation and grasping rail operation, so in the slimming of operation device, have difficult point.Along with the slimming of optical pick-up actuator, need be corresponding to the stability and the high precision int of high speed.
Fig. 1 is existing, the planimetric map of lens protruding type optical pick-up actuator structure.
As shown in Figure 1, comprising: object lens 3, the light wave with the laser diode light source emission focuses on the optical disc information record surface; Lens carrier 1 supports above-mentioned object lens 3; Focusing coil 5 disposes in said lens support 1 interior bonds; Track coil 7 is positioned at a side of above-mentioned focusing coil 5, and its winding direction and focusing coil 5 are perpendicular; Main yoke cover 11, separated by a distance in above-mentioned focusing coil 5 outside subtend configurations with above-mentioned focusing coil 5 inside and above-mentioned track coil 7; Magnet 12.
The working method of existing lens protruding type optical pick-up actuator with said structure is as follows,
LASER Light Source is injected by the optics meter of reading data of optical disk, after above-mentioned thing 3 focuses on, and the data-track of tracing record on above-mentioned CD.At this moment, in order to follow the trail of the disc tracks of high speed rotating, constantly adjust the position of above-mentioned object lens 3.
Be configured in the focusing coil 5 and the track coil 7 of said lens support 1 inboard, play a part so exactly.Above-mentioned focusing coil 5 is positioned at said lens support 1 inboard, coil rolls out dimetric shape, and track coil 7 is configured in above-mentioned focusing coil 5, is mutually the right angle with the coil winding direction of focusing coil 5.
Owing to be configured in the main yoke cover 11 of above-mentioned focusing coil inside and outside and the magnetic field that magnet 12 produces, when applying electric current, can make above-mentioned object lens 3 make focusing operation in above-mentioned focusing coil 5,.Equally, owing to be configured in the main yoke cover 11 of above-mentioned focusing coil inside and outside and the magnetic field that magnet 12 produces, when applying electric current, can make above-mentioned object lens 3 make to grasp rail operation in above-mentioned track coil 7.
When CD curves phenomenon owing to rugged property shortcoming, only rely on focusing operation and can not follow the trail of the accurate data track with the extracting rail operation, at this moment need oblique operation.For this reason, in the both sides of said lens support 1, the configuration coil carries out oblique driving.Metal spring 15 supports the central part of said lens support 1, and it not only can be supported above-mentioned focusing, grasp track, oblique operation, also works to apply control signal.
But existing lens protruding type driver with said structure is not suitable for nearest ultra-thinization, microminiaturized trend, and particularly, coil configuration is in the lens carrier outside, therefore oblique fluctuation of service, and microminiaturization is difficulty also.
Summary of the invention
In order to solve the shortcoming of prior art, the objective of the invention is, a kind of optical pick-up actuator is provided, with coil configuration in the lens carrier inboard, use the yoke cover to seal, the size of the power that can increase focusing, takes place when grasping rail operation and oblique operation realizes ultrathin, microminiaturized driver manufacturing.
For achieving the above object, the present invention adopts following technical scheme:
A kind of optical pick-up actuator is characterized in, comprising:
Object lens focus on light on the CD;
Lens carrier supports described object lens;
Focusing coil is configured in the inboard of said lens support;
Track coil is configured on the above-mentioned focusing coil;
Coil is configured in said lens internal stent peripheral region, the other direction corresponding with described focusing coil and track coil and putting;
Main yoke cover and magnet are configured to lens carrier inside center portion and lens carrier open area outside from said lens support bottom, form magnetic field;
The yoke cover seals, be configured to above-mentioned coil inside and above-mentioned focusing coil inside from said lens support top, apply electric current when described focusing coil, the yoke cover that is configured in the main yoke cover and the magnet of described lens carrier central authorities and is configured in described focusing coil inside seals and produces magnetic field, makes described object lens make focusing operation.
Effect of the present invention is, at ultrathin optical pick-up actuator, coil configuration in lens carrier inside, thereby can be produced ultrathin type, microminiaturized.
In addition, utilize the yoke cover that is configured in lens carrier top to seal, therefore when grasping rail operation, focusing operation and oblique operation, formed powerful magnetic field.
Description of drawings
Fig. 1 is the planimetric map of existing lens protruding type optical pick-up actuator structure;
Fig. 2 is the planimetric map of lens protruding type optical pick-up actuator structure of the present invention;
Fig. 3 is the outboard profile of lens protruding type optical pick-up actuator structure of the present invention;
Fig. 4 a is the planimetric map that the yoke cover of lens protruding type optical pick-up actuator of the present invention seals;
Fig. 4 b is the outboard profile that the yoke cover of lens protruding type optical pick-up actuator of the present invention seals;
Fig. 5 is the radius oblique line operation of lens protruding type optical pick-up actuator of the present invention.
Embodiment
Optical pick-up actuator of the present invention comprises: object lens focus on light on the CD; Lens carrier supports object lens; Focusing coil is configured in the inboard of lens carrier; Track coil is configured on the focusing coil; Coil is configured in around the lens carrier inside zone; Main yoke cover and magnet are configured to central part and open area from the lens carrier bottom, form magnetic field; The yoke cover seals, and is configured to coil inside and focusing coil inside from lens carrier top.
Here, the yoke cover seals to covering the structure on lens carrier top; Also be, be inserted in coil inside and focusing coil inside, the structure that forms oblique operation, focusing operation and grasp the magnetic field of rail operation; Be configured in the main yoke cover and the magnet of lens carrier central part, seal subtend with the yoke cover that is configured in focusing coil inside; Be configured in the main yoke cover and the magnet of lens carrier perimeter, seal subtend with the above-mentioned yoke cover that is configured in coil inside.
Among the present invention, with the coil configuration of oblique operation in lens carrier inside, the magnet that is used for focusing operation and extracting rail operation uses same block of magnet with the magnet that is used for ray, therefore with and at focusing operation with grasp the phenomenon that magnetic field dies down on the rail operation, seal by the yoke cover and to remedy, moreover, the magnetic field of ray also can use the yoke cover to seal, thereby can make ultra-thinization, microminiaturized driver.
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
Fig. 2 is the planimetric map of lens protruding type optical pick-up actuator structure of the present invention.
As shown in Figure 2, comprising: object lens 23 will focus on the optical disc information record surface from the light wave of laser diode emission; Lens carrier 21 supports object lens 23; Focusing coil 25 disposes in said lens support 21 interior bonds; Track coil 27 is positioned at a side of focusing coil 25, and its winding direction is vertical with focusing coil 25 winding directions; Main yoke overlaps 31 and magnet 32, is configured in lens carrier 21 inside center portions and lens carrier 21 open area outsides; Coil 28 is put with 25 one-tenth other directions of focusing coil, is configured in lens carrier 21 inner periphery zones; The yoke cover seals 30, in order respectively to be provided with the yoke cover and to cover lens carrier (21) top in focusing coil 25 inside and coil 28 inside.
Comprise the lens protruding type optical pick-up actuator of said structure, working method is as follows,
LASER Light Source is injected by the optics meter of reading data of optical disk, after object lens 23 focus on, and the data-track of tracing record on CD.At this moment, in order to follow the trail of the disc tracks of high speed rotating, constantly adjust the position of above-mentioned object lens 23.
Be configured in the focusing coil 25 and the track coil 27 of lens carrier 21 inboards, play a part so exactly.Focusing coil 25 rolls out tetragonal shape in lens carrier 21 inner coil, and track coil 27 is configured on the focusing coil 25, and the winding direction of its coil and focusing coil 25 are mutually the right angle.
Apply electric current when focusing coil 25,, can make object lens 23 make focusing operation owing to being configured in focusing coil 25 outsides, being that main yoke cover 31, the magnet 32 of lens carrier 21 central authorities and the yoke cover that disposes focusing coil 25 inside seal the magnetic field that produces.Same magnetic field equally, applies electric current when track coil 27, owing to can make object lens 23 do to grasp the operation of track.
When CD curves phenomenon owing to rugged property shortcoming, can not follow the trail of the accurate data track when only relying on focusing operation and grasping rail operation, at this moment need oblique operation.When applying electric current when coil (28), seal 30 and be configured in the main yoke cover 31 of lens carrier 21 inside and the magnetic field that magnet 32 forms owing to be configured in the yoke cover that is positioned at lens carrier 21 coil 28 inside around inboard, can make it do oblique operation.
Fig. 3 is the outboard profile of lens protruding type optical pick-up actuator structure of the present invention.
As shown in Figure 3,, dispose metal spring 41,42,43, be used for support of lens support 21, and apply signal and give track coil, focusing coil, coil (indicating among the figure) in the side of protruding type lens carrier 21; Main yoke cover 31 in lens carrier 21 bottoms, is the U font, is positioned at the outside of the other direction of lens carrier 21 middle parts and object lens 23 position parts; Magnet 32 is positioned at the outside of main yoke cover 31 of lens carrier 21 center sections and the main yoke of lens carrier 21 outsides and overlaps 31 inboards.The yoke cover seals 30, covers lens carrier 21 tops, is configured in focusing coil 25 inner and coil 28 inside.
Driver with this structure, the magnetic field that forms in focusing operation and extracting rail operation is sealed 30 by main yoke cover 31 that is configured in central part and magnet 32 with the yoke cover that is configured in focusing coil 25 inside and is formed; In the magnetic field that oblique operation forms, seal 30 and form by the main yoke cover 31 and the magnet 32 of said lens support 21 outsides and the above-mentioned yoke cover that is configured in coil 28 inside.
Different with existing driver, magnet is configuration and separation side by side, so that each operates needed magnetic field each self-forming, do not need the required magnet of other oblique operation, outside at lens carrier 21 does not dispose coil, thereby the oblique operation of driver more freely, can make the driver of ultrathin type, microminiaturization.
Fig. 4 a is that the yoke cover of lens protruding type optical pick-up actuator of the present invention seals 30 planimetric map.The yoke cover seals 30 and covers said lens support 21, presents the shape of replacement, is configured in the part and the part that is configured in two coil 28 inside of focusing coil 25 inside.
Fig. 4 b is the outboard profile that the yoke cover of lens protruding type optical pick-up actuator of the present invention seals.The yoke cover seals 30, and peripheral part of replacement one side is configured in focusing coil 25 inside, forms focusing operation and grasps required magnetic field in the rail operation; In addition, sealing any place, 30 centers from the yoke cover, the part of replacement is configured in above-mentioned two coil 28 inside, forms magnetic field required in the oblique operation.
Fig. 5 is the radius oblique line operation of lens protruding type optical pick-up actuator of the present invention.
As shown in Figure 5, propose among the present invention, the oblique operation of ultrathin optical pick-up actuator, apply power supply "+" utmost point on wire spring 35 tops, wire spring 35 bottoms apply power supply "-" utmost point, at the A dotted portion, according to Fu Laiming (Fleming) Left Hand Rule, be subjected to long-range navigation thatch (Lorenz) power upwards, be subjected to downward power, thereby said lens support 21 tilts at the B dotted portion.In addition, on wire spring 35 tops, apply power supply "-" utmost point, apply power supply "+" utmost point, be subjected to downward power, be subjected to power upwards at the B dotted portion at the A dotted portion in wire spring 35 bottoms.
Simultaneously, consider the worry that exists magnetic field to die down owing to ultrathin typeization, above-mentioned yoke cover is sealed 30 be configured in lens carrier 21 tops, strengthen magnetic field intensity, make it can grasp rail operation, focusing operation and oblique operation more exactly.
The present invention is not limited in the above embodiments, and knowing those skilled in the art can not break away under the situation of main points of the present invention in the claim tolerance band, carries out numerous variations.
Claims (3)
1. an optical pick-up actuator is characterized in that, comprising:
Object lens focus on light on the CD;
Lens carrier supports described object lens;
Focusing coil is configured in the inboard of said lens support;
Track coil is configured on the above-mentioned focusing coil;
Coil is configured in said lens internal stent peripheral region, the other direction corresponding with described focusing coil and track coil and putting;
Main yoke cover and magnet are configured to lens carrier inside center portion and lens carrier open area outside from said lens support bottom, form magnetic field;
The yoke cover seals, be configured to above-mentioned coil inside and above-mentioned focusing coil inside from said lens support top, apply electric current when described focusing coil, the yoke cover that is configured in the main yoke cover and the magnet of described lens carrier central authorities and is configured in described focusing coil inside seals and produces magnetic field, makes described object lens make focusing operation.
2. optical pick-up actuator as claimed in claim 1, it is characterized in that, it is the structure that covers said lens support top that described yoke cover seals, and also is to be inserted in above-mentioned coil inside and above-mentioned focusing coil inside, the structure that forms oblique operation, focusing operation and grasp the magnetic field of rail operation.
3. optical pick-up actuator as claimed in claim 1, it is characterized in that, described main yoke cover and magnet are configured to described lens carrier inside center portion from said lens support bottom, be to seal subtend with the described above-mentioned yoke cover that is configured in above-mentioned focusing coil inside; Described main yoke overlaps and magnet, is configured to the outside of described lens carrier open area from said lens support bottom, is to seal subtend with the described above-mentioned yoke cover that is configured in above-mentioned coil inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031159508A CN100363990C (en) | 2003-03-24 | 2003-03-24 | Light pick-up driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031159508A CN100363990C (en) | 2003-03-24 | 2003-03-24 | Light pick-up driver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1532820A CN1532820A (en) | 2004-09-29 |
| CN100363990C true CN100363990C (en) | 2008-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031159508A Expired - Fee Related CN100363990C (en) | 2003-03-24 | 2003-03-24 | Light pick-up driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100363990C (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000076673A (en) * | 1998-08-31 | 2000-03-14 | Sony Corp | Optical head driving device, and recording and reproducing system of magneto-optical recording medium |
| CN1385843A (en) * | 1994-11-18 | 2002-12-18 | 索尼公司 | Objective lens driving equipment |
-
2003
- 2003-03-24 CN CNB031159508A patent/CN100363990C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385843A (en) * | 1994-11-18 | 2002-12-18 | 索尼公司 | Objective lens driving equipment |
| JP2000076673A (en) * | 1998-08-31 | 2000-03-14 | Sony Corp | Optical head driving device, and recording and reproducing system of magneto-optical recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1532820A (en) | 2004-09-29 |
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|---|---|---|---|
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 |