CN1327420C - Transmitter of optical pick-up system in high-density optical record player - Google Patents
Transmitter of optical pick-up system in high-density optical record player Download PDFInfo
- Publication number
- CN1327420C CN1327420C CNB2004100543644A CN200410054364A CN1327420C CN 1327420 C CN1327420 C CN 1327420C CN B2004100543644 A CNB2004100543644 A CN B2004100543644A CN 200410054364 A CN200410054364 A CN 200410054364A CN 1327420 C CN1327420 C CN 1327420C
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- light
- pick
- focusing
- arm
- object lens
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Abstract
The present invention relates to a removing device of an optical pick-up system in a high-density optical recording player. An optical pickup part and a moving device of the optical pickup part are arranged in a high-density optical recording and playing device. The optical pickup part is provided with an object lens, and the optical pickup part irradiates light to an optical disk. The optical pickup part is guided and driven by the moving device of the optical pickup part to move along the radial direction of the optical disk. The present invention also comprises a frame of the optical pickup part, a permanent magnet fixed to one side of the frame of the optical pickup part and a focusing arm, wherein the frame of the optical pickup part moves along the radial direction of the optical disk under the action of the removing device. One end of the focusing arm is provided with an object lens, the other end of the focusing arm is provided with a focusing coil which can be in contact with the permanent magnet, and the middle part of the focusing arm is provided with a fixed part fixed on the frame of the optical pickup part. The focusing arm takes the middle part as a pivot point to make both ends of the focusing arm do transverse symmetrical movement, and focusing operation can be started by the focusing arm. The structure of the removing device can efficiently carry out focusing control.
Description
(1) technical field
The present invention relates to the transfer device of light pick-up system in a kind of high-density optic recording player, this be a kind of in can realizing the high-density optic recording player of more accurately following the tracks of and focusing on the transfer device of employed light pick-up system.
(2) background technology
Utilize optical mode to store and wherein a kind of method of output information is a canned data on the CD of circle, with the laser radiation of boundling to CD, thereby read canned data by the reflectivity of irradiating laser or the variation of reflex time phase place or polarisation.
Play the data of reading and recording on CD from this CD effect be light pick-up system.Under the effect of laser diode emitted laser from light pick-up system, the data conversion that writes down on the CD becomes optical signalling, be subjected to light under the effect of this optical signalling object lens on the gearing in, stand light beam again and change into electric signal, thereby be read attached to light pick-up system.
Recently, portable, portable electronical record playing device is praised highly, thereupon, people are more and more higher to the miniaturization of optical disc apparatus, light-weighted requirement, develop to miniaturization, lightweight direction as the optical take-up apparatus of important component part in the optical disc apparatus is also inevitable.
When even machine is subjected to external impact or vibration takes place, be installed in gearing on the optical take-up apparatus in the optical record-play device and also be to blame light beam is radiated on the disc tracks according to the interval of setting, and the transfer device of being responsible for the light pick-up system that tracking direction moves this moment is constructed as follows.
As shown in Figure 1, 2, Fig. 1 is the synoptic diagram of the transfer device of picking up system in the existing high-density optic recording player, Fig. 2 is that the transfer device partial plan shows among Fig. 1, and transfer device is by forming with the lower part in the light pick-up system of high-density optic recording player: be installed in being parallel to each other and leaving the leading axle 1 of certain intervals each other on the framework of optical recording player; The light of doing back and forth movement at the length direction of leading axle 1 picks up portion 10; Producing driving force makes above-mentioned light pick up back and forth movement is done by portion 10 on above-mentioned leading axle 1 transfer device voice coil motor 20.
The upper side that picks up portion 10 at above-mentioned light is equipped with the optical element object lens 11 of irradiates light on CD.The both sides of picking up portion 10 at light have two bullports 12 respectively, make light pick up portion 10 and can insert between two leading axles 1, and move along leading axle 1 length direction.
Above-mentioned voice coil motor 20 is by in that to pick up leading axle 1 length direction of portion 10 both sides perpendicular and coiled coil and centre that highlight are the moving magnets 21 of through hole with above-mentioned light; Insert above-mentioned by coiled coil and two yokes 22 parallel with leading axle 1; Make the portion of picking up 10 carry out with yoke 22 that the fixed magnets 23 of back and forth movement constitutes with parallel the playing of yoke 22 with moving magnet 21.
Electric current, under the interaction between moving magnet 21 and the fixed magnets 23, starts when moving magnet 21 begins to move and follows the tracks of operation when CD rotates by the mobile device of the light pick-up system of said structure.Moving magnet 21 follows that light picks up portion 10 or leading axle 1 moves, and to the CD irradiation, also just carry out thereupon by work such as the record of CD or broadcast by object lens 11 for light.
As the light of the existing high-density optic recording player of above-mentioned structure pick up in the portion, though be to carry out light to pick up the tracking operation that portion 10 moves along the CD radial direction equally, but, if externally under the effect of condition, distance between object lens 11 and the CD changes, and causing easily thus that light picks up portion 10 can not normal operation.
(3) summary of the invention
To the objective of the invention is in order addressing the above problem, to provide a kind of when driving light and pick up portion, can follow the tracks of and focus on the transfer device of light pick-up system in the high-density optic recording player of operation simultaneously.
For achieving the above object, the transfer device of light pick-up system in a kind of high-density optic recording player provided by the invention, be included in the light that possesses device and have object lens and pick up portion and guiding and drive described light and pick up portion, it is characterized in that also comprising along the light pick-up system mobile device that the CD radial direction moves to the CD irradiates light:
Under described transfer device effect, the light that moves along the CD radial direction picks up portion's framework;
Be fixed on described light and pick up the alnico magnets of a side of portion's framework;
Can start the focusing arm that focuses on operation, an end that focuses on arm is object lens, one end be can with the contacted focusing coil of described alnico magnets, the centre is to be fixed on described light to pick up on the framework of portion, and be that fulcrum makes two ends make the fixed part of symmetric motion up and down with this centre, under described CD and the near situation of described object lens distance, the end that focusing coil is installed on the described focusing arm descends, and the end that object lens are installed rises; And under the situation of described CD and described object lens distance, the end that focusing coil is installed on the described focusing arm rises, and the end that object lens are installed descends.
If form a vertical tortuous zigzag part at least on said fixing portion and the side that the center section of above-mentioned focusing arm combines with length direction, and opposite side is to be fixed on light to pick up spring hinge in the portion, and such structure can play effect preferably.
Simultaneously, if said fixing portion one side combines with the center section of above-mentioned focusing arm, opposite side is to be fixed on the hinge that light picks up the flexibility made from materials such as rubber in the portion, and such structure can play better effect.
In addition, if alnico magnets and focusing arm respectively are two, be installed on the both sides that light picks up portion's framework respectively, such structure is comparatively desirable.
Effect of the present invention:
As mentioned above, in the high-density optic recording player provided by the present invention in the transfer device of light pick-up system, adjusting is to the magnitude of current and the magnetic force size of focusing coil supply, being installed in the focusing coil that focuses on arm one end contacts with alnico magnets, focusing coil carries out the motion of above-below direction under the effect of magnetic force, to focus on the middle fixed part of arm is fulcrum, the object lens that focus on the arm other end are done and the moving up and down of focusing coil reverse movement direction together with focusing coil, thereby realize regulating the focus control of distance size between object lens and the CD, played the effect that improves driving rate and product stability.
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 synoptic diagram of the transfer device of picking up system in the existing high-density optic recording player.
Fig. 2 is that the transfer device partial plan shows among Fig. 1.
Fig. 3 is the embodiment synoptic diagram according to the transfer device of light pick-up system in the high-density optic recording player of the present invention.
Fig. 4 and Fig. 5 are the sectional views that starts operation according to the transfer device of light pick-up system in the high-density optic recording player of the present invention.
Fig. 6 to Fig. 8 is the synoptic diagram according to other embodiment of the transfer device of light pick-up system in the high-density optic recording player of the present invention.
The symbol description of major part in the accompanying drawing:
110,130: light picks up portion 111,131: light picks up portion's framework
112,132: alnico magnets 114,124,134,144: fixed part
115,135: focus on arm 116,1136: object lens
117,137: focusing coil
(5) embodiment
Below in conjunction with accompanying drawing, the embodiment of the transfer device of light pick-up system in the high-density optic recording player provided by the present invention is elaborated.
Construct identical part for the present invention structure with existing, use identical symbol, for the detailed explanation of same section with reference to Fig. 1.
Fig. 3 is the embodiment synoptic diagram according to the transfer device of light pick-up system in the high-density optic recording player of the present invention.Fig. 4 and Fig. 5 are the sectional views (the A-A cross section of Fig. 1) that starts operation according to the transfer device of light pick-up system in the high-density optic recording player of the present invention.
As shown in the figure, in the light pick-up system of high-density optic recording player provided by the present invention the embodiment of transfer device by forming with the lower part: be installed in being parallel to each other and leaving the leading axle 1 of certain intervals each other on the framework of optical recording player; The light of doing back and forth movement at the length direction of leading axle 1 picks up portion 110; Producing driving force makes above-mentioned light pick up back and forth movement is done by portion 110 on above-mentioned leading axle 1 transfer device voice coil motor 20.
Above-mentioned light picks up portion 110 and inserts on the leading axle 1 by bullport 111a, and the light of be formed under the effect of voice coil motor 20, being transferred along the direction of CD D radius picks up portion's framework 111.Pick up a side of portion's framework 111 at light alnico magnets 112 are installed.On CD D face, be equipped with when being responsible for the in the vertical direction handover, that regulates focus can start the focusing arm 115 that focuses on operation, the center section of above-mentioned focusing arm 115 is to be fixed on light to pick up fixed part 114 on portion's framework 111, one side of above-mentioned focusing arm 115 is equipped with object lens 116, and opposite side is equipped with the focusing coil 117 that can contact with alnico magnets 112.
At least form a vertical tortuous zigzag part on said fixing portion 114 and the side that the center section of above-mentioned focusing arm 115 combines, and opposite side is to be fixed on light to pick up spring hinge in the portion with length direction.
The mobile device of the light pick-up system of electric current by said structure when CD rotates, at mobile magnetic 21 with fixedly under the interaction between the magnetic 23, starts when mobile magnetic begins to move and follows the tracks of operation.Mobile magnetic follows the portion of picking up or leading axle moves, and light shines to CD by object lens, and work such as the record of CD or broadcast are also just carried out thereupon.
At this moment, focal point control is moved as shown in Figure 4 and Figure 5, regulates to the magnitude of current that is installed in focusing coil 117 supplies that focus on arm 115 other ends, is regulating the magnetic force size with being installed under the interaction that light picks up the alnico magnets 112 on portion's framework 111.Under the effect of magnetic force, focusing coil 117 moves along the vertical direction, is fulcrum to focus on arm 115 middle fixed parts 114, is installed in the object lens 116 that focus on arm 115 other ends and does move up and down opposite with focusing coil direction of motion together with focusing coil 117.That is to say,, under CD D and the near situation of object lens 116 distances, focus on the end that focusing coil 117 is installed on the arm 115 and descend, the end rising of object lens 116 is installed because shift in position causes when the distance of 116 on CD D and object lens changes; If under the situation of opposite CD D and object lens 116 distance, focus on the end that focusing coil 117 is installed on the arm 115 and rise, the end that object lens 116 are installed descends.Like this, guarantee always to keep certain interval between CD D and the object lens 116.
Equally, as the transfer device of light pick-up system in the high-density optic recording player of an alternative embodiment of the invention also by forming with the lower part: be installed in being parallel to each other and leaving the leading axle 1 of certain intervals each other on the framework of optical recording player; The light of doing back and forth movement at the length direction of leading axle 1 picks up portion 110; Producing driving force makes above-mentioned light pick up back and forth movement is done by portion 110 on above-mentioned leading axle 1 transfer device voice coil motor 20.
Above-mentioned light picks up portion 110 and inserts on the leading axle 1 by bullport 111a, and the light of be formed under the effect of voice coil motor 20, being transferred along the direction of CD D radius picks up portion's framework 111.Pick up a side of portion's framework 111 at light alnico magnets 112 are installed.On CD D face, be equipped with when being responsible for the in the vertical direction handover, that regulates focus can start the focusing arm 115 that focuses on operation, the center section of above-mentioned focusing arm 115 is to be fixed on light to pick up fixed part 124 on portion's framework 111, one side of above-mentioned focusing arm 115 is equipped with object lens 116, and opposite side is equipped with the focusing coil 117 that can contact with alnico magnets 112.
Said fixing portion 124 1 sides combine with the center section of above-mentioned focusing arm 115, and opposite side is to be fixed on the hinge that light picks up the flexibility made from materials such as rubber in the portion 110.
The course of action of the another one embodiment of the present invention of above-mentioned formation is identical with the course of action shown in Fig. 4 and Fig. 5, just changes the pliability hinge at the hinge that focuses on arm 115 center sections into by spring hinge.
Because CD D or shift in position cause when the distance of 116 on CD D and object lens changes, under CD D and the near situation of object lens 116 distances, focus on the end that focusing coil 117 is installed on the arm 115 and descend, the end rising of object lens 116 is installed; If under the situation of opposite CD D and object lens 116 distance, focus on the end that focusing coil 117 is installed on the arm 115 and rise, the end that object lens 116 are installed descends.Like this, guarantee always to keep certain interval between CD D and the object lens 116.
Equally, in the high-density optic recording player of an alternative embodiment of the invention the transfer device of light pick-up system as shown in Figure 7, also by forming: be installed in being parallel to each other and leaving the leading axle 1 of certain intervals each other on the framework of optical recording player with the lower part; The light of doing back and forth movement at the length direction of leading axle 1 picks up portion 130; Producing driving force makes above-mentioned light pick up back and forth movement is done by portion 130 on above-mentioned leading axle 1 transfer device voice coil motor 20.
Above-mentioned light picks up portion 130 and inserts on the leading axle 1 by bullport 131a, and the light of be formed under the effect of voice coil motor 20, being transferred along the direction of CD D radius picks up portion's framework 131.Pick up two sides of portion's framework 131 at light alnico magnets 132 are installed respectively.When two responsible in the vertical directions being installed on CD D face transferring, regulate focus and can start the focusing arm 135 that focuses on operation, the center section of above-mentioned focusing arm 135 is respectively to be fixed on light to pick up fixed part 134 on portion's framework 131, above-mentioned focusing arm 135 is a fulcrum with the central authorities that light picks up portion's framework 131 respectively, and symmetric motion can be carried out in its both sides.Above-mentioned two focus on a side that arms 135 join be equipped with opposite side that 136, two on object lens focus on arm 135 be separately installed with can be installed in the focusing coil 137 that alnico magnets 132 that light picks up portion's framework 131 both sides contact.
Above-mentioned two fixed parts 134 with form a vertical tortuous zigzag part at least respectively with on the side that the center section of above-mentioned focusing arm 135 combines with length side, and opposite side is respectively the spring hinge that is fixed in the portion of picking up 130.
The embodiment of the transfer device of picking up system compares with the embodiment of transfer device in the high-density optic recording picking up system of the present invention shown in Fig. 4,5 in another high-density optic recording player of the invention described above, in the high-density optic recording picking up system shown in Fig. 4, Fig. 5 in the transfer device, paired alnico magnets 112 and focusing coil 117 are formed at a side, and a side of object lens 116 is to focus on arm 115; In the light pick-up system in the transfer device, paired alnico magnets 132 and focusing coil 137 lay respectively at both sides in the high-density optic recording player of the present invention shown in Fig. 7, and the both sides of object lens 136 are two and focus on arms 135.Other course of action mode is identical.
In the high-density optic recording player of another embodiment of the present invention the transfer device of light pick-up system as shown in Figure 8, also by forming: be installed in being parallel to each other and leaving the leading axle 1 of certain intervals each other on the framework of optical recording player with the lower part; The light of doing back and forth movement at the length direction of leading axle picks up portion 130; Producing driving force makes above-mentioned light pick up back and forth movement is done by portion 130 on above-mentioned leading axle 1 transfer device voice coil motor 20.
Above-mentioned light picks up portion 130 and inserts on the leading axle 1 by bullport 131a, and the light of be formed under the effect of voice coil motor 20, being transferred along the direction of CD D radius picks up portion's framework 131.Pick up two sides of portion's framework 131 at light alnico magnets 132 are installed respectively.When two responsible in the vertical directions being installed on CD D face transferring, regulate focus and can start the focusing arm 135 that focuses on operation, the center section of above-mentioned focusing arm 135 is respectively to be fixed on light to pick up fixed part 144 on portion's framework 131, above-mentioned focusing arm 135 is a fulcrum with the central authorities that light picks up portion's framework 131 respectively, and symmetric motion can be carried out in its both sides.Above-mentioned two focus on a side that arms 135 join be equipped with opposite side that 136, two on object lens focus on arm 135 be separately installed with can be installed in the focusing coil 137 that alnico magnets that light picks up portion framework both sides contact.
Above-mentioned two fixed part 144 1 sides combine with above-mentioned two center sections that focus on arms 135 respectively, and opposite side is respectively to be fixed on the hinges fixing bonding part 144 that light picks up the flexibility made from materials such as rubber in the portion 130.
The embodiment of the transfer device of light pick-up system compares with the embodiment of transfer device in the high-density optic recording picking up system of the present invention shown in Fig. 4,5 in another high-density optic recording player of the invention described above, in the high-density optic recording picking up system shown in Fig. 4, Fig. 5 in the transfer device, paired alnico magnets 112 and focusing coil 117 are formed at a side, and a side of object lens 116 is to focus on arm; In the light pick-up system in the transfer device, paired alnico magnets 132 and focusing coil 137 lay respectively at both sides in the high-density optic recording player of the present invention shown in Fig. 7, and the both sides of object lens 136 are two and focus on arms 135; Change the pliability hinge at the hinge that focuses on arm 135 center sections into by spring hinge.In addition, under the interaction of alnico magnets 132 and focusing coil 137, the course of action of moving up and down of object lens 136 and the focusing that causes is the same with the course of action of the embodiment shown in Fig. 4, Fig. 5.
As mentioned above, the transfer device of picking up system can realize regulating the focus control of distance size between object lens and the CD in the high-density optic recording player provided by the present invention.
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 (4)
1, the transfer device of light pick-up system in a kind of high-density optic recording player, be included in the light that possesses device and have object lens and pick up portion and guiding and drive described light and pick up portion, it is characterized in that also comprising along the light pick-up system mobile device that the CD radial direction moves to the CD irradiates light:
Under described transfer device effect, the light that moves along the CD radial direction picks up portion's framework;
Be fixed on described light and pick up the alnico magnets of a side of portion's framework;
Can start the focusing arm that focuses on operation, an end that focuses on arm is object lens, one end be can with the contacted focusing coil of described alnico magnets, the centre is to be fixed on described light to pick up on the framework of portion, and be that fulcrum makes two ends make the fixed part of symmetric motion up and down with this centre, under described CD and the near situation of described object lens distance, the end that focusing coil is installed on the described focusing arm descends, and the end that object lens are installed rises; And under the situation of described CD and described object lens distance, the end that focusing coil is installed on the described focusing arm rises, and the end that object lens are installed descends.
2, the transfer device of light pick-up system in the high-density optic recording player as claimed in claim 1 is characterized in that:
At least form a vertical tortuous zigzag part on described fixed part and the side that the center section of described focusing arm combines, and opposite side is to be fixed on described light to pick up spring hinge in the portion with length direction.
3, the transfer device of light pick-up system in the high-density optic recording player as claimed in claim 1 is characterized in that:
Described fixed part one side combines with the center section of described focusing arm, and opposite side is to be fixed on the hinge that described light picks up the flexibility made from elastomeric material in the portion.
4, the transfer device of light pick-up system in the high-density optic recording player as claimed in claim 1 is characterized in that:
Described alnico magnets and described focusing arm respectively are two, are installed on the both sides that described light picks up portion's framework respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100543644A CN1327420C (en) | 2004-09-08 | 2004-09-08 | Transmitter of optical pick-up system in high-density optical record player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100543644A CN1327420C (en) | 2004-09-08 | 2004-09-08 | Transmitter of optical pick-up system in high-density optical record player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1747001A CN1747001A (en) | 2006-03-15 |
| CN1327420C true CN1327420C (en) | 2007-07-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100543644A Expired - Fee Related CN1327420C (en) | 2004-09-08 | 2004-09-08 | Transmitter of optical pick-up system in high-density optical record player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1327420C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1091985A (en) * | 1996-09-17 | 1998-04-10 | Funai Electric Co Ltd | Objective lens driving device |
| JP2000020983A (en) * | 1998-07-03 | 2000-01-21 | Toshiba Corp | Optical head device, and disk recording or reproducing apparatus |
| CN1519821A (en) * | 2002-12-18 | 2004-08-11 | ������������ʽ���� | Optical recording method |
-
2004
- 2004-09-08 CN CNB2004100543644A patent/CN1327420C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1091985A (en) * | 1996-09-17 | 1998-04-10 | Funai Electric Co Ltd | Objective lens driving device |
| JP2000020983A (en) * | 1998-07-03 | 2000-01-21 | Toshiba Corp | Optical head device, and disk recording or reproducing apparatus |
| CN1519821A (en) * | 2002-12-18 | 2004-08-11 | ������������ʽ���� | Optical recording method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1747001A (en) | 2006-03-15 |
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Granted publication date: 20070718 Termination date: 20100908 |