CN1591610A - Multi-shaft driven near field optical recording player - Google Patents
Multi-shaft driven near field optical recording player Download PDFInfo
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- CN1591610A CN1591610A CN 03150796 CN03150796A CN1591610A CN 1591610 A CN1591610 A CN 1591610A CN 03150796 CN03150796 CN 03150796 CN 03150796 A CN03150796 A CN 03150796A CN 1591610 A CN1591610 A CN 1591610A
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Abstract
The present invention is aimed at providing a near field optical record playback device which can be driven by several shafts. It includes the following devices: driven arm, it consists of coil supporting component with voice coil used for making reciprocal rotary movement and first suspension component placed on another side, and can be used for making tracking rotation around first rotating shaft inserted on the base plate; second suspension component, its interior is equipped with slide contact, it can be parallelly placed in the lower portion of front end of the first suspension component for making rotation along the focused direction; focusing magnetic field formed from focusing coil and magnet and used for implementing rotation of the above-mentioned second suspension component along focused direction; and elastic supporting component for providing a certain elastic force between second suspension component and optical objective lens under the action of the above-mention focusing field.
Description
(1) technical field
The invention relates to the near-field optical recording playing device, more detail is about following the tracks of for the data pits that realizes the near field laser head, the tracking servo of realizing slider drives and the multi-shaft driven near-field optical recording playing device of focus servo driving.
(2) background technology
CD or photomagneto disk need bit (perhaps writing down mark) compact in size and dwindle track space and can realize highdensity recording capacity.But for the recording film at CD forms bit, the size of focal point 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/broadcast is as follows: the light that incides lens inside with the angle greater than critical angle is mapped to the low local time of refractive index from the high place of refractive index, and 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 lens, this light is known as evanescent wave (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 broadcast optical instrument allow light carry out total reflection from lens inside, make lens surface produce evanescent wave, just can make evanescent wave and CD produce coupling, thereby can realize the record and the broadcast of data of optical disk.
Fig. 1 is the structural drawing of existing near-field optical recording playing device.
With reference to Fig. 1, existing near-field optical recording playing device constitutes one by suspended portion (suspension) 102 and coil supporting 103.Comprising: obtain rotating the actuating arm 101 of support by the turning axle of assigning on the substrate (figure does not show) 104, with constitute VCM (Voice Coil Motor: plate coil voice coil motor) (flatcoil) 105 with respect to above-mentioned turning axle 104 in the coil supporting 103 that is positioned at slider 108 relative positions, with the high precision magnet 107 that is fixed on the high precision magnet loading plate 106 on the substrate and is positioned at above-mentioned plate coil 105 downsides, the slider 108 that front end by being arranged on above-mentioned suspended portion 102 and the state that floats on CD 110 tops by aerostatic buoyancy scan disc tracks.
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 makes it rotatable by the turning axle of being made up of jointly suspended portion 102 and coil supporting 103 and assign on the substrate 104, by the following VCM that will talk about along the arrow indication ' J ' or ', and K ' direction moves.
The front end of above-mentioned suspended portion 102 is provided with slider 108, and each track to thing lens and 109 pairs of CDs 110 of subtend lens that above-mentioned slider 108 relies on reading and recording to use scans.
When actuating arm 101 was on rotating CD 110 record surfaces, slider 108 also flew on CD 110 record surfaces, and slider 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 reverse side is wound with the plate coil 105 that constitutes VCM.
The lower end of plate coil 105 is mounted with high precision magnet 107, and above-mentioned high precision magnet 107 is fixed in the high precision magnet loading plate 106 on the substrate.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, when in the middle of plate coil 105, importing the electric current of other direction, plate coil 105 will and high precision magnet 107 between produce electromagnetic action, thereby obtain one to the right the rotation power, 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 aerostatic buoyancy with the state that is suspended in CD 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, reads and just is difficult to conduct interviews exactly so the CD when folding line is arranged carries out data tracking.
(3) summary of the invention
Therefore, the present invention carries out in order to address the above problem just.The object of the present invention is to provide a kind of multi-shaft driven near-field optical recording playing device, this device can be realized following the tracks of driving with the coil supporting of actuating arm, and the front end of while with the 1st suspended portion that actuating arm is connected as a single entity carries out the focusing rotation of the 2nd suspended portion.
In addition, the present invention also aims to provide a kind of aforesaid multi-shaft driven near-field optical recording playing device, this device can be realized, the 2nd suspended portion at actuating arm is provided with symmetrical supporting structure, can make inner Liar obtain focusing on driving force and reverse rotation power by electromagnetic force.
To achieve these goals, multi-shaft driven near-field optical recording playing device of the present invention is characterized in comprising with lower device:
Actuating arm is made of jointly coil supporting with the voice coil loudspeaker voice coil that is used for carrying out crankmotion and the 1st suspended portion that is arranged on opposite side, and follows the tracks of rotation around the 1st turning axle that is inserted on the substrate;
The 2nd suspended portion, inside is provided with slider, is set in parallel in the 1st suspended portion front end bottom of above-mentioned actuating arm, carries out the focus direction rotation;
Focusing magnetic field is made of jointly focusing coil that is arranged on the coiling of level on above-mentioned the 2nd suspended portion and the magnet that vertically is provided with, is used to realize the rotation of the focus direction of above-mentioned the 2nd suspended portion;
Elastic supporting member, under the effect of above-mentioned focusing magnetic field, above-mentioned the 2nd suspended portion provides certain elastic force between above-mentioned the 2nd suspended portion and Liar when carrying out the rotation of focus direction.
Aforesaid multi-shaft driven near-field optical recording playing device is characterized in, it is symmetrical position, center that focusing magnetic field on above-mentioned the 2nd suspended portion and elastic supporting member are arranged on the Liar.
Aforesaid multi-shaft driven near-field optical recording playing device, be characterized in, focusing coil and magnet acting in conjunction symmetrical in above-mentioned the 2nd suspended portion produce electromagnetic force down, under the effect of electromagnetic force, above-mentioned the 2nd suspended portion is rotated in the forward or reverse rotation, carries out focusing operation thereby drive above-mentioned Liar.
Aforesaid multi-shaft driven near-field optical recording playing device, be characterized in, be that symmetrical being arranged under focusing coil on above-mentioned the 2nd suspended portion and the magnet acting in conjunction in center produces under the effect of electromagnetic force with the Liar, above-mentioned the 2nd suspended portion is rotated in the forward or reverse rotation, carries out focusing operation thereby drive above-mentioned Liar.
Aforesaid multi-shaft driven near-field optical recording playing device, be characterized in, the elastic supporting member of above-mentioned the 2nd suspended portion comprises: the 1st elastic supporting member that is used for being focused on by the effect in above-mentioned focusing coil that is symmetrically set and magnet generation magnetic field rotation, when focusing on rotation, make Liar oppositely focus on the 2nd elastic supporting member of rotation with being used at above-mentioned the 1st elastic supporting member.
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 structural drawing of existing near-field optical recording playing device.
Fig. 2 is the structural drawing according to the multi-shaft driven near-field optical recording playing device of the specific embodiment of the invention.
Fig. 3 is the mode of operation figure according to the 2nd suspended portion in the specific embodiment of the invention.
(5) embodiment
Fig. 2 is the structural drawing according to the multi-shaft driven near-field optical recording playing device of the specific embodiment of the invention.
With reference to shown in Figure 2, multi-shaft driven near-field optical recording playing device of the present invention comprises with lower device:
Actuating arm 201 is made of jointly with the 1st suspended portion 202 that is arranged on opposite side the coil supporting 203 with the voice coil loudspeaker voice coil (figure does not show) that is used for carrying out crankmotion, and follows the tracks of rotation around the turning axle that is inserted on the substrate;
The 2nd suspended portion 205, inside is provided with Liar 210, is set in parallel in the 1st suspended portion 202 front end bottoms of above-mentioned actuating arm 201, carries out the focus direction rotation;
Focusing magnetic field by constituting jointly at the focusing coil 208 of the 2nd suspended portion 205 levels coiling and the magnet 206 that vertically is provided with, is used to realize the rotation of above-mentioned the 2nd suspended portion 205 focus direction;
Elastic supporting member (comprising the 1st elastic supporting member 216 and the 2nd elastic supporting member 217), under the effect of above-mentioned focusing magnetic field, between the 2nd suspended portion 205 and Liar 210, provide certain elastic force, so that when the 2nd suspended portion 205 focuses on driving, Liar 210 can carry out opposite direction and drive.
Below, the multi-shaft driven near-field optical recording playing device to the embodiment of the invention is elaborated with reference to the accompanying drawings.
With reference to Fig. 2, actuating arm 201 is made of jointly coil supporting 203 and the 1st suspended portion 202 that is arranged on opposite side, and follows the tracks of rotation around the turning axle that is inserted on the substrate.
In order to realize this crankmotion, be provided with judgement tracking coil (with reference to Fig. 1) in above-mentioned coil supporting 205, be relatively set with magnet (with reference to Fig. 1) with it in its underpart, therefore, change in polarity along with the electric current that is input to tracking coil, between coil and the magnet electromagnetic force will take place, so also will repulsive force therefore occur and refute power, thus back and forth rotation about can carrying out around turning axle 204.
And, above-mentioned the 1st suspended portion 202 combines with the 2nd suspended portion 205 that is provided with slider 205a at front end, the 2nd suspended portion 205 is set in parallel in the front end bottom of the 1st suspended portion 202, and constitute certain frame with the 1st suspended portion 202, magnet 206,207 is set in the inside of frame, with focusing coil 208,209, and Liar 210.Liar 210 can carry out focusing operation under the driving of focusing coil 208,209 and magnet 207,208.
In more detail, the 2nd suspended portion 205 is set in parallel in the front end of the 1st suspended portion 202, and between the focusing coil support sector 211,213 of the focusing coil 208,209 that a left side/right side 214,215 of above-mentioned the 2nd suspended portion 205 and above-mentioned magnet 206,207 are oppositely arranged the 1st elastic supporting member 216 is set, it is connected as a single entity.The center is provided with Liar 210 between the symmetrical focusing coil support sector 211,213, between each focusing coil support sector 211,213 and the Liar 210 the 2nd elastic supporting member 217 is set then.Here, above-mentioned elastic supporting member 216,217 can be spring, also can be other material that elastic force can be provided or the parts that can guide rotation.
So, variation along with the polarity of input current in the focusing coil 208,209 of the 2nd suspended portion 205, with the magnet 206 that is fixed on the 2nd suspended portion 205, produce electromagnetic force between 207, direction or the rotation of direction down on above-mentioned focusing coil 208,209 under the effect of electromagnetic force and corresponding focusing coil support sector 211,213 will carry out.Therefore, the Liar 210 that is positioned at the center obtains certain elastic force of above-mentioned elastic supporting member 216,217, will be rotated in the opposite direction, so as shown in Figure 3, Liar 210 will begin to go up reverse direction towards the line P0 of focusing coil 208,209 and focus on driving.
Promptly, the Liar 210 that is provided with in the 2nd suspended portion 205 centers be a left side/right side with on/following direction is symmetrically set, and the focusing magnetic field that will be used to realize focusing on driving is (by magnet 206,207 and focusing coil 208,209 constitute jointly) be arranged on above-below direction, and the elastic supporting member 216,217 that is arranged on inner certain space 215 provides rotary freedom to Liar 210, therefore, when symmetrical focusing magnetic field applied the power of some directions, the laser head that is arranged at the center will be to driving in the other direction.
Multi-shaft driven near-field optical recording playing device of the present invention has very high practical value.The present invention is as a kind of near-field optical recording playing device, require to carry out simultaneously tracking servo and focus servo when driving in existing hard drive and near field optic instrument driving force, can drive 2 axles simultaneously, thereby can keep the invariant position of removable CD, realize that therefore multiaxis drives.
In addition, the 2nd rotation that makes the front end of the 1st rotation that the coil supporting of actuating arm is carried out and actuating arm carry out becomes possible, simultaneously, because above-mentioned the 2nd rotation supporting structure is a symmetrical structure, so the focus direction driving of the laser head of can realizing suspending.
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 (4)
1. multi-shaft driven near-field optical recording playing device is characterized in that comprising with lower device:
Actuating arm is made of jointly coil supporting with the voice coil loudspeaker voice coil that is used for carrying out crankmotion and the 1st suspended portion that is arranged on opposite side, and follows the tracks of rotation around the 1st turning axle that is inserted on the substrate;
The 2nd suspended portion, inside is provided with slider, is set in parallel in the 1st suspended portion front end bottom of above-mentioned actuating arm, carries out the focus direction rotation;
Focusing magnetic field is made of jointly focusing coil that is arranged on the coiling of level on the 2nd suspended portion and the magnet that vertically is provided with, is used to realize the rotation to the focus direction of above-mentioned the 2nd suspended portion;
Elastic supporting member, under the effect of above-mentioned focusing magnetic field, above-mentioned the 2nd suspended portion provides certain elastic force between above-mentioned the 2nd suspended portion and Liar when carrying out the rotation of focus direction.
2. multi-shaft driven near-field optical recording playing device as claimed in claim 1 is characterized in that: it is symmetrical position, center that focusing magnetic field on above-mentioned the 2nd suspended portion and elastic supporting member are arranged on above-mentioned Liar.
3. multi-shaft driven near-field optical recording playing device as claimed in claim 1, it is characterized in that: under the effect of the electromagnetic force that produces under focusing coil that is symmetrically set on above-mentioned the 2nd suspended portion and the magnet acting in conjunction, above-mentioned the 2nd suspended portion is rotated in the forward or reverse rotation, carries out focusing operation thereby drive above-mentioned Liar.
4. multi-shaft driven near-field optical recording playing device as claimed in claim 1, it is characterized in that: with the Liar be symmetrical being arranged under the effect that produces electromagnetic force under focusing coil on above-mentioned the 2nd suspended portion and the magnet acting in conjunction in center, above-mentioned the 2nd suspended portion is rotated in the forward or reverse rotation, carries out focusing operation thereby drive above-mentioned Liar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150796 CN1591610A (en) | 2003-09-05 | 2003-09-05 | Multi-shaft driven near field optical recording player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03150796 CN1591610A (en) | 2003-09-05 | 2003-09-05 | Multi-shaft driven near field optical recording player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1591610A true CN1591610A (en) | 2005-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03150796 Pending CN1591610A (en) | 2003-09-05 | 2003-09-05 | Multi-shaft driven near field optical recording player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1591610A (en) |
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2003
- 2003-09-05 CN CN 03150796 patent/CN1591610A/en active Pending
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