CN1790500A - Optical pick-up driver - Google Patents
Optical pick-up driver Download PDFInfo
- Publication number
- CN1790500A CN1790500A CN 200410089540 CN200410089540A CN1790500A CN 1790500 A CN1790500 A CN 1790500A CN 200410089540 CN200410089540 CN 200410089540 CN 200410089540 A CN200410089540 A CN 200410089540A CN 1790500 A CN1790500 A CN 1790500A
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- China
- Prior art keywords
- coil
- mentioned
- camera lens
- bayonet socket
- lens bayonet
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Abstract
The invention discloses a light pick-up driver, which comprises the following parts: object lens, lens bayonet, focal coil, radiation coil, track coil, coil and magnet, wherein the object lens is attached on the center part; the lens bayonet can move at several angles; the focal coil lies on the side of lens bayonet; the radiation coil winds the external edge of focal coil to form a single coil; the track coil lies on the side of lens bayonet; the coil lies on the side of lens bayonet; the magnet possesses opposite inversed magnetic pole.
Description
[technical field]
The present invention is the invention of the driver for light picker simplified of relevant driver for light picker (optical pick-up actuator), the especially loop construction on the camera lens bayonet socket.
[background technology]
In general, driver for light picker mainly moves the assembly (reel, camera lens bayonet socket) comprise object lens, thereby makes that object lens and optical recording media are such as CD) relative position keep certain.Driver for light picker also has following function in addition: follow the trail of the magnetic track writing information of optical recording media, perhaps read information.
Fig. 1 is the structural drawing of normal optical pick-up driver.
As shown in Figure 1, driver for light picker 100 is made of following three parts: be fixed in the object lens 102 at center, camera lens bayonet socket 101 and be combined in the side so that the magnetic circuit that moves of camera lens bayonet socket movably.Magnetic circuit above-mentioned is by constituting with the lower part: tracking coil and focusing coil 105,106, multiple magnetic head 103 and multipole fixed magnet 104.
Be fixed with focusing coil 105 about the both sides of camera lens bayonet socket 101 above-mentioned, so that the focusing operation.The both sides center fixation of camera lens bayonet socket 101 has tracking coil 106, so that the tracking operation.
In addition, the top edge of camera lens bayonet socket 101 is equipped with radial coil 117, so that the radiation tilt operation.
With reference to Fig. 2 and Fig. 3, the last lower limb with the magnetic pole of magnet 104 is relative respectively can to see above-mentioned focusing coil 105, and tracking coil 106 and radial coil 117 are relative with the left and right edges of the magnetic pole of magnet 104 respectively.
In addition, as shown in Figure 3, magnet 104 is by two magnet 104a that are the symmetry of " " shape, and 104c constitutes, and there are the magnetic pole of " " shape opposite magnet 104b and 104d in lower end, the left and right sides.Magnet 104 can be assembled according to multipole mode by a magnet and constitute, and also can be made of 4 blocks of homopolar magnets.
The upper and lower of magnet 104 has magnetic pole opposite magnet 104a and 104c, and two blocks of magnet are relative with the center of rotation of tracking coil 105.
In addition, multipole fixing magnet 104, the left and right sides of camera lens bayonet socket 101 are fixed with ferromagnetism U font multiple magnetic head 103 respectively; Multiple magnetic head 103 has been realized being connected with the integrated of optical pickup base by integrated means.
In addition, two or three parallel hoist cables 107 are fixed in the center, side, top and the bottom of camera lens bayonet socket 101, and the other end of hoist cable 107 above-mentioned is fixed in flat board (not shown) by the framework 109 of camera lens bayonet socket 101 1 sides
Hoist cable 107 makes that above-mentioned camera lens bayonet socket 101 is outstanding, has brought into play the junction line effect of supplying electric current.
Here, in order to make the very strong hoist cable 107 of magnetic have decay characteristics, be combined with damper (not shown) in framework 109 inside, the other end of above-mentioned hoist cable 107 is fixed on the flat board that links to each other with the framework outside by soldering.
As depicted in figs. 1 and 2, the operating process of above-mentioned detent is as follows: focusing coil 105 and the tracking coil 106 that is attached to the left and right sides of camera lens bayonet socket 101 direction that meets at right angles is intertwined, when electric current flows through coil 105, about the direction of flux has just become.At this moment, the flux of the multipole magnet 104 relative with focusing coil 105 has just played the effect of electromagnetism, has just produced the power of vertical direction in the focusing coil 105; In order to correct the perpendicular displacement of focusing direction, camera lens bayonet socket 101 starts the focusing servo-drive system.
The tracking coil 106 that is attached to camera lens bayonet socket 101 both sides central parts when electric current passes through, can excite flux along suitable direction tangle up, and makes fixing multipole magnet 104 and electromagnetic force produce reacting force and repulsion.Under the effect of above-mentioned reacting force and repulsion, camera lens bayonet socket 101 is started working thereby make the tracking that reduces tracking error wait upon dress system along the side-to-side movement of tracking direction.
In addition, be attached with radioactivity tilt coil 117 at the edge of camera lens bayonet socket 101, multipole magnet 104 has produced electromagnetic force jointly with above-mentioned radioactivity tilt coil 117, and electromagnetic force makes camera lens bayonet socket 101 move along the radioactivity vergence direction.
That is to say, as shown in Figure 3, when the radial coil 117 that is wound in camera lens bayonet socket edge had electric current to pass through, above-mentioned radial coil 117 made the left and right sides of camera lens bayonet socket 101 rotate along opposite direction with the different magnetic of relative multipole magnet magnet 104a, 104b jointly.
Produced moving coil under permanent magnet self magnetic action, driver for light picker moves in the mode of moving coil, and object lens are moved to the position that lightscribe media 100 is wished.At this moment, the camera lens bayonet socket is to be fixed by the hoist cable with enhancing and decay characteristics as the moving part (moving part) of above-mentioned driver for light picker, designs according to the frequency that possesses regulation.In addition, camera lens bayonet socket above-mentioned is done the motion of going forward side by side according to focusing direction (focusing) and tracking (tracking) direction, and focusing direction (focusing) and tracking (tracking) direction are mutually perpendicular.In order to reduce the optical signalling error, should not rotate and reverse etc. under the state of unnecessary vibrations and move.
Above-mentioned camera lens bayonet socket 101 follows mark and moving that the focusing direction is carried out together with the coil 105,106 that is fixed in its both sides, is called as mobile (moving) coil mode.In contrast, be bonded to the multipole magnet and the camera lens bayonet socket of camera lens bayonet socket outer rim, what multipole magnet was done moves, and is called as mobile (moving) magnet mode.At this moment, the mode of motion that magnet and coil produced has utilized the Lorentz force in the Fu Linming left-hand rule.
But before this, radial coil is wound in the outer rim of camera lens bayonet socket reel, so with regard to having produced the problem that needs new space, that is to say, in order to twine radial coil, will form the kinking groove on the metal outer rim of camera lens bayonet socket.This space is new space, is not the space that driver is installed.In addition, another problem is that the radial coil Wiring apparatus will be arranged.
[summary of the invention]
The 1st purpose of the present invention provides a driver for light picker that can be achieved as follows function: along camera lens bayonet socket both sides focusing coil outer ledge face, only twine a radial coil, thereby make radial coil and focusing coil to twine continuously.
The 1st purpose of the present invention provides a driver for light picker that can be achieved as follows function: be wound with focusing coil on the reel of the both sides of camera lens bayonet socket, only twine a radial coil at the edge of this coil, the radial coil Wiring apparatus just can access simplification thus.
To achieve these goals, driver for light picker among the present invention is made of following several parts, becomes its feature: be fixed in the object lens at center, movably camera lens bayonet socket and shot card oral-lateral face focusing coil, along above-mentioned focusing coil outer rim twine the radial coil of single coil, above-mentioned shot card oral-lateral face the tracking coil, be positioned at the relative magnet of coil, different magnetic poles of above-mentioned shot card oral-lateral face.
What deserves to be mentioned is that the present invention also has following another feature: above-mentioned focusing coil is wound in the inside by the reel of shot card interruption-forming; Above-mentioned radial coil is in above-mentioned reel inside, and the outer survey edge coiling face along focusing coil is wound in single coil.
What deserves to be mentioned is that the present invention also has following another feature: all there is focusing coil the left and right sides, side of camera lens bayonet socket; Above-mentioned radial coil is wound in the reel inside of its formation; Above-mentioned radial coil is wound in single coil along the outer rim of above-mentioned left and right sides focusing coil.
What deserves to be mentioned is that the present invention also has following another feature: above-mentioned focusing coil and radial coil are each sides at the camera lens bayonet socket, form one by template.
As mentioned above, use the driver for light picker among the present invention, camera lens bayonet socket top edge does not form the winding slot of radial coil, thereby the shape of camera lens bayonet socket and structure become very simple, and can reduce working space.
In addition, curl the both sides reel of existing focusing coil, can twine a radial coil, it is simple that Wiring apparatus also becomes.
[description of drawings]
Fig. 1 is the structural drawing of normal optical pick-up driver.
Fig. 2 is the coil discharge structure figure among Fig. 1.
Fig. 3 is the motion feature figure of all directions of the magnetic circuit generation in the presentation graphs 1.
Fig. 4 is the structural drawing according to the driver for light picker of operational instances of the present invention.
Fig. 5 is the structural drawing of the magnetic circuit among Fig. 4.
Fig. 6 is the coil discharge structure figure among Fig. 4.
Fig. 7 is the motion feature figure of all directions of the magnetic circuit generation among Fig. 4.
[embodiment]
Below, will be in conjunction with the accompanying drawings, the principle of work of the driver for light picker among the present invention is carried out brief description.
Can see that with reference to Fig. 4 and Fig. 6 the driver for light picker among the present invention is made of following several parts: be bonded to the object lens 202 of core, movable camera lens bayonet socket 201, in order to make camera lens bayonet socket 201 can carry out that multiaxis rotates in its side in conjunction with being magnetic the loop.This magnetic circuit is by coil 205,206, and 217, multipole magnet 204, multiple magnetic head 203 constitute.
Coil 205,206,217 effects above-mentioned are as follows: focusing coil 205 helps camera lens bayonet socket 201 to do focus movement; Tracking coil 206 helps camera lens bayonet socket 201 to do the tracking motion; Radial coil 217 helps camera lens bayonet socket 201 to do the radiativity banking motion.
Above-mentioned focusing coil 205 is attached on a left side, the both sides/right reel 201a of camera lens bayonet socket 201, and is extremely corresponding with the border N utmost point or the S of the last lower magnetic pole of multipole magnet 204 respectively.Tracking coil 206 is fixed by epoxy resin, supports that by the coil that the centre, both sides of camera lens bayonet socket 201 forms knob 201b is supported, and is extremely corresponding with the border N utmost point or the S of the last lower magnetic pole of multipole magnet 204 respectively.
In addition, radial coil 217 is wound on the whole edge surface of shot card oral-lateral face left and right sides focusing coil 205.Such as a left side/right focusing coil 205 at first twines, and twines radial coil 217 afterwards on these focusing coil 205 peripheral kinking faces.
That is to say that radial coil 217 is wound in the outer edge surface of focusing coil 205 with the kinking face of focusing coil 205 means as its inner support.Therefore the magnetic pole of the left side magnet 204 of radial coil 217 is N:S, and the magnetic pole of right side magnet 204 is S:N.The mutually different magnetic in a left side/right side makes the camera lens bayonet socket produce.
Here, can contact between the relative radial coil in camera lens bayonet socket 201 both sides or in parallel, if allow electric current flow through with onesize or same direction, the camera lens bayonet socket just can move along radiation direction.Perhaps independent respectively coiling also can be controlled the camera lens bayonet socket by the Control current size and Orientation.
In addition, as shown in Figure 5, there is multipole magnetized magnet 204 both sides of camera lens bayonet socket, and as shown in Figure 4, this magnet has 4 magnetic poles.Such as " " font magnet 204a and the mutual symmetric offset spread of 204b, its lower end, left and right sides is arranged with " " font magnet 204c and the 204d opposite with its magnetic pole.Magnet 204 can be constituted by multipole magnetized magnet by one, also can be made of 4 blocks of multipole magnets.
The pole boundary of the left side of multipole magnet 204/right horizontal direction is corresponding with the center of rotation and the pole boundary of tracking coil 206, on the multipole magnet 204/and the pole boundary of following vertical direction is corresponding with the center of rotation of focusing coil 205 and radial coil 217.
Here, tracking coil 206 is positioned at a left side/right two middle side parts of above-mentioned camera lens bayonet socket 201, and coiling width in its underpart is trapezoidal or tetragonal greater than the top width that winds the line.
In addition, " U " font multiple magnetic head 203 that the left and right sides of camera lens bayonet socket 201 is magnetic very strong just is fixed within the multiple magnetic head 203 by multipole magnetized magnet 204.Multiple magnetic head 203 has been realized integrated connection the with optical pickup base (not shown) by integrated means.
In addition, an end of 3 parallel hoist cables 207 is fixed in the middle part, side up and down of camera lens bayonet socket 201, and the other end of above-mentioned hoist cable 207 is by on the frame fixation substrate (not shown) of camera lens bayonet socket 201 1 sides.Possess that above-mentioned hoist cable 207 is rational more than two pairs or two pairs.Improve above-mentioned camera lens bayonet socket 201, the junction line function of performance supplying electric current.
As shown in Figure 4 and Figure 5, the workflow of this driver is as follows: be fixed in focusing coil 205 and tracking coil 206 about the both sides of camera lens bayonet socket 201, at right angles direction curls together.When having electric current to pass through in the coil 205, the direction of flux just becomes above-below direction.At this moment, the flux of the multipole magnet 203 relative with focusing coil 205 has produced electromagnetic force, and focusing coil 205 has just produced the power of vertical direction, and 201 beginnings of camera lens bayonet socket move up and down along focus direction.In order to reduce this motion, focus on and wait upon the dress system startup.
In addition, the trapezoidal tracking coil 206 that is attached to centre, camera lens bayonet socket 201 both sides is wound in together with suitable direction, when electric current passes through, launch flux to prescribed direction, this just feasible fixedly multipole magnet 203 and electromagnetic force have produced reacting force and repulsive force.Under the effect of above-mentioned reacting force and repulsive force, camera lens bayonet socket 201 follows the side-to-side movement of mark direction, and the while tracking is waitd upon dress system and also started working, to reduce tracking error.
And, radial coil 217 is twined along the outer ledge coiling face or the whole lateral surface of the left and right sides focusing coil 205 of camera lens bayonet socket 201, when passing through electric current in the radial coil 217, the multipole magnet 204a relative with above-mentioned radial coil 117,204c, 204b, the different magnetic poles N:S of 204d,: under the effect of S:N, the left and right sides of camera lens bayonet socket 201 is just done gyration in the opposite direction.That is to say that if the left side of camera lens bayonet socket is to go up to focus on, its right side is to focus on down; If the left side of camera lens bayonet socket is to focus on down, its right side is to go up to focus on.
Another application of the invention is as follows: at first a left side, the both sides/right focusing coil with the camera lens bayonet socket curls, and on the outer rim coiling face of this left side/right focusing coil, has only the radial coil of a circle to curl up with one.This structure also can be applicable in the novel driver technology (FinePatterncoil).
As previously mentioned, the left side, both sides of camera lens bayonet socket/right formed reel 201a is compounded to form two coils of two class different directions, and on the spool that above-mentioned focusing coil curled, the both sides of radial coil just can wind the line jointly.That is to say that along the outer ledge face of focusing coil, each side of radial coil can both wind the line, the coil of two different directions can level be wound on the spool of camera lens bayonet socket both sides, so coil-winding becomes simply, and does not need to prepare other instruments.
Claims (4)
1, driver for light picker comprises:
Be fixed in the object lens in centre, the camera lens bayonet socket that can multiaxis rotates, focusing coil is positioned at above-mentioned shot card oral-lateral face, along the outer rim of above-mentioned focal line circle, is wound in the radial coil of a circle;
The tracking coil of above-mentioned shot card oral-lateral face;
The magnetic pole mutually different magnet relative with the coil that is positioned at above-mentioned shot card oral-lateral face.
2, driver for light picker according to claim 1 is characterized in that:
Above-mentioned focusing coil is wrapped in the reel inside of camera lens bayonet socket, and above-mentioned radial coil curls Cheng Yiquan in above-mentioned reel inside along focusing coil outer rim spiral face.
3, driver for light picker according to claim 1 is characterized in that:
About one side of camera lens bayonet socket above-mentioned focusing coil is arranged respectively, above-mentioned radial coil is wound in the inside of formed reel, and above-mentioned radial coil curls Cheng Yiquan along the outer rim of an above-mentioned left side/right focusing coil.
4, driver for light picker according to claim 1 is characterized in that:
Above-mentioned focusing coil and radial coil form integrated template in each side of camera lens bayonet socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410089540 CN1790500A (en) | 2004-12-15 | 2004-12-15 | Optical pick-up driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410089540 CN1790500A (en) | 2004-12-15 | 2004-12-15 | Optical pick-up driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1790500A true CN1790500A (en) | 2006-06-21 |
Family
ID=36788285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410089540 Pending CN1790500A (en) | 2004-12-15 | 2004-12-15 | Optical pick-up driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1790500A (en) |
-
2004
- 2004-12-15 CN CN 200410089540 patent/CN1790500A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |