CN1306496C - Ultra-small laser head multi-shaft driver using voice coil motor - Google Patents
Ultra-small laser head multi-shaft driver using voice coil motor Download PDFInfo
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- CN1306496C CN1306496C CNB03150793XA CN03150793A CN1306496C CN 1306496 C CN1306496 C CN 1306496C CN B03150793X A CNB03150793X A CN B03150793XA CN 03150793 A CN03150793 A CN 03150793A CN 1306496 C CN1306496 C CN 1306496C
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Abstract
The present invention relates to an ultra-small laser head multi-shaft driver using a voice coil motor, which is provided with a drive arm, a magnetic field generator and a rotating shaft, wherein the drive arm is composed of a hanging rack part positioned at the front end of one side and a coil supporting part positioned at the other side, and can rotate in a certain range; the hanging rack part is provided with a slider assembled with an opposite objective close to and opposite to the surface of an optical disc; the magnetic field generator is provided with the voice coil motor formed in a radial broken state on the coil supporting part of the drive arm so that the drive arm is driven to track and rotate in a focusing servo mode; the rotating shaft is used for realizing the rotation of the drive arm so as to guide the drive arm to track a basal plate and rotates in a focusing mode along the circular arc rotating center of the coil supporting part through the magnetic field generator. The present invention achieves the effects of multi-shaft drive, and has high practical value.
Description
(1) technical field
The invention relates to the device in the near-field optical recording player.Refer in particular to a kind of microminiature laser head multiaxis drive unit that utilizes voice coil motor, this device drives slider and carries out tracking servo and focus servo, thereby the data tracking of the laser head of can realizing marching into the arena is servo.
(2) background technology
CD or photomagneto disk need the place value miniaturization and dwindle track space and can realize highdensity recording capacity.But for the recording film at CD forms place value, the size of optically focused hot spot is subjected to reflecting the restriction of restriction on the CD, so recording density also just has been subjected to certain restriction.
According to the trend of information high capacity, be badly in need of the restriction that a kind of new optical recording/broadcast mode overcomes existing optical recording/broadcast mode now.Recently, the research of the near-field optical recording/broadcast (near field recording/reproduction) in the near field that is expected to make recording capacity realize epoch-making leap for utilization constantly increases.
The principle of near-field optical recording and broadcast is as follows.Incide the light of object lens inside with the angle greater than critical angle, be mapped to the low local time of refractive index from the high place of refractive index, light will produce total reflection.At this moment, owing to the total reflection of light, can have the light of very fine amount on the surface of object lens, this light is known as (evanescent) ripple of easy dissipation or is called evanescent wave.If utilize this evanescent wave, will make in the middle of the far field because the restriction of the resolution that the refraction effect of light causes, promptly since the refraction restriction cause once can not realization the high de-agglomeration energy, in the middle of the near field, just can realize now.Near-field optical recording and play optical instrument and allow light carry out total reflection from object lens inside makes objective lens surface produce evanescent wave, thereby just can be so that evanescent wave and CD produce to be coupled, thereby can realize the record and the broadcast of data of optical disk.
Fig. 1 be existing near-field optical recording playing device activation configuration figure.
With reference to Fig. 1, existing near-field optical recording playing device constitutes one by suspended portion (suspension) 102 and coil supporting 103.Comprising: the actuating arm 101 that obtains rotating support by the turning axle of assigning on the substrate (not shown) 104, with in the coil supporting 103 that is being arranged in following slider 108 relative positions the plate coil 105 that constitutes VCM is arranged with respect to above-mentioned turning axle 104, with high precision magnet loading plate 106 that is fixed on the downside on the substrate and the high precision magnet 107 that is positioned at above-mentioned plate coil 105 downsides, by front end that is arranged on above-mentioned suspended portion 102 and the slider 108 that disc tracks is scanned by the state that floats on CD 110 more than the air flow pressure.
Below, with reference to the accompanying drawings above-mentioned existing near-field optical recording playing device is elaborated.
With reference to Fig. 1, actuating arm 101, obtain rotatable support by the turning axle of forming jointly by suspended portion 102 and coil supporting 103 and assign on the substrate 104, move along ' J ' or ' K ' direction of arrow indication by the following VCM that will talk about then.
The front end of above-mentioned suspended portion 102 is provided with slider 108, and usefulness is read in above-mentioned slider 108 dependence and recording each track to thing object lens and 109 pairs of CDs of subtend object lens scans.
Actuating arm 101 is on rotating CD 110 record surfaces time, and slider 108 flies on CD 110 record surfaces, and the slider of slider 108 remains the certain interval relative with record surface.
Actuating arm 101 is provided with the slider 108 that is positioned at above-mentioned suspended portion 102 front ends.But with respect to turning axle 104, the coil supporting 103 that is arranged in above-mentioned slider 108 relative positions has the plate coil (flat coil) 105 that constitutes VCM.The high precision magnet loading plate 106 that is fixed on the substrate is mounted with high precision magnet 107 in the lower end of plate coil 105.High precision magnet 107 and the plate coil 105 common VCM that form, VCM and the actuating arm 101 common drivers 100 of forming.
Like this, in the middle of plate coil 105 during the electric current of input certain orientations, plate coil 105 will and high precision magnet 107 between produce electromagnetic action, thereby obtain a power to anticlockwise.So actuating arm 101 will obtain a clockwise revolving force.On the contrary, in the middle of plate coil 105 during the electric current of input other directions, plate coil 105 will and high precision magnet 107 between produce electromagnetic action, thereby obtain the power of rotation to the right.So actuating arm 101 will obtain an anticlockwise revolving force.
Like this, rotatablely move along with actuating arm 101 comes and goes, the slider that is provided with on the slider 108 will rely on air flow pressure with the state that is suspended in CD 110 CD 110 to be carried out track scanning.
The driver of above-mentioned existing near-field optical recording playing device is the operation of simple support tracking servo, so for because CD when folding line is arranged, CD is carried out data tracking read and just be difficult to conduct interviews exactly.
(3) summary of the invention
The present invention proposes in order to address the above problem.
The object of the present invention is to provide a kind of microminiature laser head multiaxis drive unit that utilizes voice coil motor, this kind device, be that the voice coil motor that constitutes on the coil supporting of actuating arm is installed a field generator for magnetic, this device is used for following the tracks of and focus servo drives, and the electromagnetic force that produces by field generator for magnetic makes actuating arm can follow the tracks of and focus servo operation.
The object of the present invention is achieved like this: a kind of microminiature laser head multiaxis drive unit that utilizes voice coil motor comprises:
Actuating arm, form jointly by suspended portion and the coil supporting that is positioned at described suspended portion opposite side, one side front end of described suspended portion has a slider that has loaded near optical disc surface and relative with optical disc surface subtend object lens, and described actuating arm can be rotated within the specific limits;
Field generator for magnetic, constitute by voice coil motor and magnetic iron plate, described voice coil motor places the outer peripheral portion of described coil supporting, described voice coil motor is the morphosis radially to disconnect on the coil supporting of above-mentioned actuating arm, described magnetic iron plate is arranged on the left and right sides that rotation center with described coil supporting is the outer peripheral portion that prolongs on the circular arc at center, is used for determining the center of described actuating arm rotating range;
Turning axle by described field generator for magnetic, in order to realize the rotation of described actuating arm, guides its circular arc rotation center along described coil supporting to carry out the tracking and the focusing of substrate are rotated.
Described field generator for magnetic, comprise: with the rotation center in coil supporting is the focus servo coil that prolongs on the circular arc at center, keep certain intervals, homopolar magnet and the yoke relative in the tracking servo coils of the vertical coiling in a left side/right side of outer peripheral portion with above-mentioned outer peripheral portion with focus servo coil and tracking servo coils.
Described voice coil motor, comprise: be the focus servo coil of carrying out the level coiling on a left side/right side, neighboring that prolongs on the circular arc at center with rotation center in coil supporting, keep certain intervals, 2 utmost point magnet and the yokes relative in the tracking servo coils of the vertical coiling in the back of above-mentioned outer peripheral portion with above-mentioned outer peripheral portion with focus servo coil and tracking servo coils.
Described voice coil motor, comprise: be the focus servo coil of carrying out the level coiling on a left side/right side, neighboring that prolongs on the circular arc at center with rotation center in coil supporting, the vertical tracking servo coils of coiling and keep certain intervals, 4 utmost point magnet and the yokes relative up and down in the back of above-mentioned outer peripheral portion with focus servo coil and tracking servo coils with above-mentioned outer peripheral portion.
Described voice coil motor, the center for the rotating range that can find coil supporting also will be provided with the magnetic iron plate respectively on the left and right sides top and bottom, neighboring that prolong on the above-mentioned circular arc, thereby makes it become the benchmark of the rotation center that field generator for magnetic determines.
The bottom surface of the suspended portion of described actuating arm be provided be used for compensating and CD between the position sensor of spacing.
Effect of the present invention:
The microminiature laser head multiaxis drive unit of voice coil loudspeaker voice coil that utilizes of the present invention is in hard drive or near field optic instrument slip driving force, not only can realize following the tracks of and drive, and when focusing on driving, needs can drive diaxon, have and constantly to adjust for the change of removable CD as a kind of, to keep the inductor and the drive unit of certain position, can realize the effect that multiaxis drives, so the present invention has very high practical value.
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 be existing near-field optical recording playing device activation configuration figure;
Fig. 2 is the structure sketch map that utilizes the microminiature laser head multiaxis drive unit of voice coil motor of the present invention;
Fig. 3 is the displayed map of the position sensor present position among the present invention;
Fig. 4 (a), Fig. 4 (b) are the construction plan view and the sketch map of the microminiature laser head multiaxis drive unit of the use homopolar magnet among the present invention the 1st embodiment;
Fig. 5 (a), Fig. 5 (b) are the driving of the voice coil motor among the present invention the 1st embodiment and the displayed map of magnet polarity;
Fig. 6 (a), Fig. 6 (b) are the construction plan view and the sketch map of the microminiature laser head multiaxis drive unit of use 2 utmost point magnet among the present invention the 2nd embodiment;
Fig. 7 (a), Fig. 7 (b) are the driving of voice coil motor among the present invention the 2nd embodiment and the displayed map of magnet polarity;
Fig. 8 (a), Fig. 8 (b) are the construction plan view and the sketch map of the microminiature laser head multiaxis drive unit of use 4 utmost point magnet of the present invention the 3rd embodiment;
Fig. 9 (a), Fig. 9 (b) are the driving of voice coil motor among the present invention the 3rd embodiment and the displayed map of magnet polarity.
The symbol description of critical piece in the accompanying drawing:
201,301,401,501.... actuating arm 202,302,402,502.... suspended portion
203.... coil supporting 204,304,404, the 504.... turning axle
205.... coil 206,306,406, the 506.... yoke
207,307,407,507... magnet 208... object lens
209,309,409, the 509... slider
210,310,410,510... magnetic iron plate
211,311,411, the 511... position sensor
305a, 405a, 505a... tracking servo coils
305b, 405b, 505b... focus servo coil
(5) embodiment
Below with reference to accompanying drawings, the embodiment of the microminiature laser head multiaxis drive unit of voice coil motor that utilizes of the present invention is elaborated.
Fig. 2 is the structure sketch map that utilizes the microminiature laser head multiaxis drive unit of voice coil motor of the present invention.Fig. 3 is the embodiment displayed map of position sensor among the present invention.
With reference to Fig. 2, the microminiature laser head multiaxis drive unit of voice coil motor that utilizes of the present invention comprises: actuating arm 201, by the having and loaded near the suspended portion 202 of CD 212 surfaces and relative slider 209 to thing object lens and subtend object lens (object lens) 208 and the coil supporting 203 that is positioned at suspended portion 202 opposite sides and form jointly of a side front end, can be rotated within the specific limits with cd-rom recording surface.
Field generator for magnetic is provided with voice coil motor, and this voice coil motor is the morphosis radially to disconnect on the coil supporting 203 of above-mentioned actuating arm 201, follows the tracks of with focus servo and rotates so that be used for driving above-mentioned actuating arm 201.
Turning axle 204 in order to pass through above-mentioned field generator for magnetic, is realized the rotation of actuating arm, guides its circular arc rotation center along above-mentioned coil supporting 203 to carry out the tracking and the focusing of substrate are rotated.
Here, above-mentioned field generator for magnetic is made of voice coil motor and magnetic iron plate 210.Voice coil motor comprises: be the coil 205 that obtains of the outer peripheral portion coiling that prolongs on the circular arc at center and keep with above-mentioned coil 205 that the magnet 207 of certain intervals spacings and yoke 206 are common to be constituted at the rotation center with coil supporting 203.Magnetic iron plate 210 is arranged on the left and right sides that above-mentioned rotation center with coil supporting 203 is the outer peripheral portion that prolongs on the circular arc at center, is used for determining the center of rotating range.
And, with reference to Fig. 3, its constitute also comprise be arranged on suspended portion 202 bottom surfaces with the position sensor 211 of above-mentioned slider 209 on same horizontal line.
With the 1st embodiment of the present invention is example, (a) and (b) with reference to Fig. 4, above-mentioned field generator for magnetic comprises, with rotation center the focus servo coil 305b of the level coiling that prolongs on the circular arc at center in coil supporting 303, keep certain intervals, homopolar magnet 307 and the yoke 306 relative with tracking servo coils 305a at the tracking servo coils 305a of the vertical coiling in a left side/right side of outer peripheral portion with above-mentioned outer peripheral portion with focus servo coil 305b.
With the 2nd embodiment is example, (a) and (b) with reference to Fig. 6, above-mentioned field generator for magnetic comprises, be the focus servo coil 405b that carries out the level coiling on a left side/right side, neighboring that prolongs on the circular arc at center with rotation center in coil supporting 403, the vertical tracking servo coils 405a of coiling and keep certain intervals, 2 utmost point magnet 407 and the yokes 406 relative with tracking servo coils 405a in the back of above-mentioned outer peripheral portion with focus servo coil 405b with above-mentioned outer peripheral portion.
With the 3rd embodiment is example, (a) and (b) with reference to Fig. 8, above-mentioned field generator for magnetic comprises, be the focus servo coil 505b that carries out the level coiling on a left side/right side, neighboring that prolongs on the circular arc at center with rotation center in coil supporting 503, at the vertical tracking servo coils 505a of coiling and keep certain intervals, 4 utmost point magnet 507 and the yokes 506 relative with tracking servo coils 505a up and down of the back of above-mentioned outer peripheral portion with focus servo coil 505b with above-mentioned outer peripheral portion.
Below, with reference to the accompanying drawings the microminiature shaven head multiaxis drive unit of voice coil motor that utilizes of the present invention is further described in detail.
With reference to Fig. 2, actuating arm 201 is made of jointly the coil supporting 203 of suspended portion 202 and circular shape.And assign into turning axle 204 on the substrate of coil supporting 203 of above-mentioned circular shape, and obtain rotatable support, then by the following VCM that will talk about, move along the tracking servo or the focus servo direction of arrow indication.
The front end of suspended portion 202 is provided with slider 209.Be provided with in the above-mentioned slider 209 and read usefulness, recording laser head, and organize upright have pair thing object lens and subtend object lens (object lens) 208.
Though above-mentioned actuating arm 201 is provided with slider 209 at the front end of suspended portion 202,, comprise in the middle of the coil supporting 203 coil 205 that constitutes voice coil motor with its across a certain distance magnet 207 mutually.That is, voice coil motor is made of coil 205 and magnet 207, and magnet 207 is attached on the yoke 206.
The form of the voice coil motor of such coil supporting 203 is radial cap (radial cap) form.Above-mentioned coil is that the neighboring that prolongs on the circular arc at center winds the line and obtains with the rotation center in coil supporting 203.207 of magnet with the certain intervals relative with above-mentioned coil attached on the yoke 206.
The coil 205 that can make the actuating arm of such formation follow the tracks of with the above-mentioned voice coil motor of focus servo rotation comprises tracking servo coils and the focus servo coil that the back will be talked about.207 of magnet are divided into one pole, 2 utmost points, several classes such as 4 utmost points.
Promptly, rely on the focusing and the tracking servo rotation of the actuating arm 201 that above-mentioned voice coil motor carries out, by along with the polarity of the electric current of importing in the above-mentioned tracking servo coils and the electromagnetic force that produces between the magnet, coil supporting 203 is just carried out clockwise or counterclockwise tracking servo operation along turning axle 204 for the center.By along with the polarity of the electric current of importing in the above-mentioned focus servo coil and the electromagnetic force that produces between the magnet, coil supporting 203 is the center along turning axle 204 just, carries out clockwise or counterclockwise focus servo operation.Like this, actuating arm 201 just can carry out the rotation in the certain limit of tracking servo or focus servo direction to CD.
So, actuating arm 201 just can carry out crankmotion (tracking) and back and forth moved up and down substrate (base).And the slider 209 of its front end will carry out track scanning with the state that is suspended on the CD to CD under the driving of air flow pressure.
At this moment, actuating arm 201, the coil 205 in the coil supporting 203 by opposite side and magnet 207 obtains tracking servo and the focus servo driving force is rotated.The left-right symmetric of the air groove between coil 205 and magnet 207 (air gap) partly is provided with magnetic iron plate 210, then as the reference position that drives.
And, as shown in Figures 2 and 3, suspended portion 202 lower ends of actuating arm 201 and slider 209 be in that a position sensor 211 on the horizontal line can detect accurately and CD between distance, promptly, to the distance between object lens 208 and the CD 212, thereby can realize that even the CD 212 in the rotation has change, also can keep certain focal position, thereby read dish accurately.
Describe with reference to embodiment below:
The 1st embodiment:
The 1st embodiment is the structure when having used homopolar magnet, and (a) of Fig. 4 is the installation drawing of embodiment, and (b) of Fig. 4 is the stretch-out view of voice coil motor wherein, Fig. 5 (a) and (b) be wherein homopolar magnet and the pie graph of coil.
With reference to Fig. 4 and Fig. 5, the center of the coil supporting 303 of the circular shape of actuating arm 301 is provided with turning axle 304, and is the driving center with this turning axle 304.Rotation center with coil supporting 303 is the focus servo coil 305b that prolongs on the circular arc at center, is the level coiling; Tracking servo coils 305a on a left side/right side of outer peripheral portion is vertical coiling; And keep certain intervals with above-mentioned outer peripheral portion, one pole (N) magnet 307 relative with tracking servo coils 305a with focus servo coil 305b, and yoke 306 is set at the back side of homopolar magnet 307.Its operation as Fig. 5 (a) (b) shown in, according to the change in polarity of the electric current that is transported to tracking servo coils 305a, thereby and the electromagnetic force that produces between the magnet 307 make actuating arm carry out the rotation of tracking servo direction for the center along the turning axle 304 of coil supporting 303.In addition, the change in polarity of the electric current of focusing coil 305b, thereby and the electromagnetic force that produces between the magnet 307 make actuating arm carry out the rotation of focus servo direction for the center along the turning axle 304 of coil supporting 303.Each is used shown in the arrow to direction of current, tracking servo driving force direction and focus servo driving force direction among the figure.
And, be attached with symmetrical magnetic iron plate 310 in the top and the bottom, left and right side of coil supporting 303, actuating arm finish follow the tracks of and the rotation of focus direction after, can also be easy to remain on again original position.
The 2nd embodiment:
The 2nd is embodied as the structure when having used 2 utmost point magnet.(a) of Fig. 6 is the installation drawing of embodiment, and (b) of Fig. 6 is the stretch-out view of voice coil motor wherein, Fig. 7 (a) and (b) be wherein 2 utmost point magnet and the pie graph of coil.
With reference to Fig. 6 and Fig. 7, the center of the coil supporting 403 of the circular shape of actuating arm 401 is provided with turning axle 404, and is the driving center with this turning axle 404.Being the focus servo coil 405b on a left side/right side of the outer peripheral portion that prolongs on the circular arc at center with the rotation center of coil supporting 404, is the level coiling; Tracking servo coils 405a in the back of outer peripheral portion is vertical coiling; And keep certain intervals with above-mentioned outer peripheral portion, 2 utmost points (N:S) magnet 407 relative with focus servo coil 405b and tracking servo coils 405, and yoke 406 is set at the back side of 2 utmost point magnet 407.
Its operation is shown in Fig. 7 (a) and (b), according to the change in polarity of the electric current that is transported to tracking servo coils 405a, thereby and the electromagnetic force that produces between the magnet 407 make actuating arm carry out the rotation of tracking servo direction for the center along the turning axle 404 of coil supporting 403.In addition, along with the change in polarity of the electric current of focusing coil 405b, thereby and the electromagnetic force that produces between the magnet 407 make actuating arm carry out the rotation of above-below direction for the center along the turning axle 404 of coil supporting 403.Each is used shown in the arrow to direction of current, tracking servo driving force direction and focus servo driving force direction among the figure.
And when following the tracks of the rotation that focuses on sense of rotation, magnetic iron plate 410 is that benchmark provides support to its rotation with this rotation center.
The 3rd embodiment:
The 3rd is embodied as the structure when having used 4 utmost point magnet.(a) of Fig. 8 is the installation drawing of embodiment, and (b) of Fig. 8 is the stretch-out view of voice coil motor wherein, Fig. 9 (a) and (b) be wherein 4 utmost point magnet and the pie graph of coil.
With reference to Fig. 8 and Fig. 9, the center of the coil supporting 503 of the circular shape of actuating arm 501 is provided with turning axle 504, and is the driving center with this turning axle 504.Rotation center with coil supporting 505 is to carry out the level coiling on a left side/right side, neighboring that prolongs on the circular arc at center, obtain focus servo coil 505b, the tracking servo coils 505a that vertically winds the line in the back of outer peripheral portion, and keep certain intervals with above-mentioned outer peripheral portion, 4 utmost point (the N:Ss relative with tracking servo coils 505a with focus servo coil 505b, S:N) magnet 507, and at the back side of 4 utmost point magnet 507 yoke 506 are set.
Its operation is shown in Fig. 9 (a) and (b), on the back, neighboring of coil supporting, following 4 utmost point magnet, the 507 relative position coilings that are provided with obtain tracking servo coils 505a, about it, be provided with respectively with above-mentioned magnet 507 relative positions on coiling obtain focus servo coil 505b, thereby can be along with the change in polarity of the electric current that is transported to tracking servo coils 505a, and to produce electromagnetic force coil support sector 503 between the magnet 507 be the rotation that the tracking servo direction is carried out at the center with turning axle 504.In addition, along with electric current and the change in polarity of focusing coil 505b, and the electromagnetic force that produces between the magnet 507 makes that coil supporting 503 is the rotation that the focus servo direction is carried out at the center with turning axle 505.Each is used shown in the arrow to direction of current, tracking servo driving force direction and focus servo driving force direction among the figure.
And when following the tracks of the rotation that focuses on sense of rotation, magnetic iron plate 510 is that benchmark provides support to its rotation with this rotation center.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense, so be not 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 distortion of the above embodiment.
Claims (6)
1, a kind of microminiature laser head multiaxis drive unit that utilizes voice coil motor is characterized in that having following structure:
Actuating arm, form jointly by suspended portion and the coil supporting that is positioned at described suspended portion opposite side, one side front end of described suspended portion has a slider that has loaded near optical disc surface and relative with optical disc surface subtend object lens, and described actuating arm can be rotated within the specific limits;
Field generator for magnetic, constitute by voice coil motor and magnetic iron plate, described voice coil motor places the outer peripheral portion of described coil supporting, described voice coil motor is the morphosis radially to disconnect on the coil supporting of above-mentioned actuating arm, described magnetic iron plate is arranged on the left and right sides that rotation center with described coil supporting is the outer peripheral portion that prolongs on the circular arc at center, is used for determining the center of described actuating arm rotating range;
Turning axle by described field generator for magnetic, in order to realize the rotation of described actuating arm, guides its circular arc rotation center along described coil supporting to carry out the tracking and the focusing of substrate are rotated.
2, the microminiature laser head multiaxis drive unit that utilizes voice coil motor as claimed in claim 1 is characterized in that described voice coil motor comprises:
With the rotation center in described coil supporting is the focus servo coil that prolongs on the circular arc at center, is the level coiling;
Tracking servo coils on a left side/right side of the outer peripheral portion of described coil supporting is vertically coiling; With
Keep certain intervals, homopolar magnet and the yoke relative with tracking servo coils with the outer peripheral portion of described coil supporting with described focus servo coil.
3, as the claim item 1 described microminiature laser head multiaxis drive unit that utilizes voice coil motor, it is characterized in that described voice coil motor comprises:
With the rotation center in described coil supporting is on the circular arc at center, carries out the focus servo coil of level coiling on a left side/right side of the outer peripheral portion that prolongs;
The vertical tracking servo coils of coiling in the back of the outer peripheral portion of described coil supporting; With
Keep certain intervals, 2 utmost point magnet and the yokes relative with tracking servo coils with the outer peripheral portion of described coil supporting with described focus servo coil.
4, the microminiature laser head multiaxis drive unit that utilizes voice coil motor as claimed in claim 1 is characterized in that described voice coil motor comprises:
With the rotation center in described coil supporting is the focus servo coil of carrying out the level coiling on a left side/right side, neighboring that prolongs on the circular arc at center;
The vertical tracking servo coils of coiling up and down in the back of the outer peripheral portion of described coil supporting; With
Keep certain intervals, 4 utmost point magnet and the yokes relative with tracking servo coils with the outer peripheral portion of described coil supporting with described focus servo coil.
5, as claim 2 or the 3 or 4 described microminiature laser head multiaxis drive units that utilize voice coil motor, it is characterized in that described field generator for magnetic is, center for the rotating range that can find described coil supporting, also on the left and right sides top and bottom, neighboring that prolong on the described circular arc, the magnetic iron plate be set respectively, thereby make it become the benchmark of the definite rotation center of field generator for magnetic.
6, the microminiature laser head multiaxis drive unit that utilizes voice coil motor as claimed in claim 1, the bottom surface that it is characterized in that the suspended portion of described actuating arm be provided be used for compensating and CD between the position sensor of spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03150793XA CN1306496C (en) | 2003-09-05 | 2003-09-05 | Ultra-small laser head multi-shaft driver using voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03150793XA CN1306496C (en) | 2003-09-05 | 2003-09-05 | Ultra-small laser head multi-shaft driver using voice coil motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1591608A CN1591608A (en) | 2005-03-09 |
| CN1306496C true CN1306496C (en) | 2007-03-21 |
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|---|---|---|---|
| CNB03150793XA Expired - Fee Related CN1306496C (en) | 2003-09-05 | 2003-09-05 | Ultra-small laser head multi-shaft driver using voice coil motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109834386B (en) * | 2017-11-27 | 2020-12-11 | 大族激光科技产业集团股份有限公司 | Laser welding head and laser welding equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001256660A (en) * | 2000-03-09 | 2001-09-21 | Mitsumi Electric Co Ltd | Optical pickup |
| JP2002093071A (en) * | 2000-09-07 | 2002-03-29 | Matsushita Electric Ind Co Ltd | Information recording and reproducing disk unit |
| KR20030039917A (en) * | 2001-11-16 | 2003-05-22 | 엘지전자 주식회사 | Apparatus optical pick-up of super thin film form |
-
2003
- 2003-09-05 CN CNB03150793XA patent/CN1306496C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001256660A (en) * | 2000-03-09 | 2001-09-21 | Mitsumi Electric Co Ltd | Optical pickup |
| JP2002093071A (en) * | 2000-09-07 | 2002-03-29 | Matsushita Electric Ind Co Ltd | Information recording and reproducing disk unit |
| KR20030039917A (en) * | 2001-11-16 | 2003-05-22 | 엘지전자 주식회사 | Apparatus optical pick-up of super thin film form |
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| Publication number | Publication date |
|---|---|
| CN1591608A (en) | 2005-03-09 |
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