CN1159050A - Optical pick-up driving apparatus - Google Patents
Optical pick-up driving apparatus Download PDFInfo
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- CN1159050A CN1159050A CN 96104221 CN96104221A CN1159050A CN 1159050 A CN1159050 A CN 1159050A CN 96104221 CN96104221 CN 96104221 CN 96104221 A CN96104221 A CN 96104221A CN 1159050 A CN1159050 A CN 1159050A
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- meticulous configuration
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Abstract
An improved optical pick-up apparatus capable of simplifying the construction of a tracking coil and a focussing coil and more easily assembling the system by providing fine-patterned tracking coil and focussing coil, which generate a driving force so as to drive an objective lens, which includes an objective lens for condensing a light; an objective lens holder for supporting the objective lens; a yoke engaged to the objective lens holde rand having a permanent magnet; and a fine-patterned coil provided with a tracking fine-patterned portion and a focusing fine-patterned portion, engaged to the objective lens holder, and constituting a magnetic circuit with the permanent magnet.
Description
The present invention relates to a kind of optical pick-up driving apparatus, and relate to a kind of follow-on light particularly and search device, produce to drive the tracking coil of meticulous configuration of driving force of object lens and the focusing coil of meticulous configuration by equipment, this device can be simplified the structure of tracking coil and focusing coil and can more easily assemble this system.
Referring to Fig. 1 and Fig. 2, conventional optical pick-up driving apparatus comprises an objective carrier 1 and a printed circuit board (PCB) 5, and objective carrier 1 surrounds object lens 6 and is used to support object lens 6, and printed circuit board (PCB) 5 is installed on the side of objective carrier 1.
Referring to Fig. 4 A, twining a focusing coil 2 with certain altitude around the outside surface of objective carrier 1.
In addition, as shown in Fig. 2 and Fig. 3 A, a plurality of volute tracking coils 3 are installed on the left-hand face of focusing coil 2 and right lateral surface respectively.
Focusing coil 2 and tracking coil 3 are electrically connected on the predetermined portions of PCB5, to realize the electric interconnection between them.
Simultaneously, form a plurality of rectangles 1 li of objective carrier and insert groove 1a, each rectangle inserts groove and extends on the basal surface of objective carrier from the top surface of objective carrier 1 always.
In addition, as shown in Figure 2, construct a plurality of rectangular foot 9a, and each leg 9a is inserted among the insertion groove 1a of objective carrier 1.And in a plurality of yokes 9 of installing between left side leg 9a and the 9b and between right side leg 9a and 9b, each yoke has a permanent magnet 4, and permanent magnet 4 is used for working in coordination with focusing coil 2 and tracking coil 3 and produces certain magnetic force.
In the accompanying drawings, reference number 7 is represented the lead spring that is connected with objective carrier 1.
As shown in Fig. 3 B, when when tracking coil 3 provides electric current, because it is to produce certain magnetic field that conventional light is searched the permanent magnet 4 and tracking coil 3 purposes of device, (F=B * I * L) drive unit is driven on the tracking direction consistent with left side and right direction magnetic force according to Fleming left hand theory.
In Fig. 3 B, reference character " B " is represented the direction in magnetic field, and reference character " F " is represented the direction of magnetic force.
In addition, when electric current being applied on the focusing coil 2, because (magnetic force of F=B * I * L) drives optical pick-up driving apparatus along direction up and down according to Fleming left hand theory.
In Fig. 4 B, reference character " B " is represented the direction in magnetic field, and reference character " F " is represented the direction of magnetic force.
But conventional optical pick-up driving apparatus has such shortcoming, promptly must add a printed circuit board that is used for being electrically connected focusing coil and tracking coil in order to apply voltage to focusing coil and tracking coil.Also need Winder in addition, so that focusing coil is wrapped on the outside surface of objective carrier and is used to form tracking coil.Also need simultaneously assembling device in addition.Increased production cost of products like this.
In addition, when making focusing coil and tracking coil, because the artificial assembling in mechanical process of focusing coil and tracking coil foozle can occur, thereby reduce the performance of optical pick-up driving apparatus.
Therefore, an object of the present invention is to provide a kind of optical pick-up driving apparatus that conventional light is searched problem that device is met that overcomes.
Another object of the present invention provides a kind of follow-on light and searches device, this follow-on device can produce driving force with the tracking coil of the meticulous configuration of driving object lens and the focusing coil of meticulous configuration by equipment, and this device can be simplified the structure of tracking coil and focusing coil and can more easily assemble this system.
In order to achieve the above object, provide a kind of light to search device.This device comprises: the object lens that are used for optically focused; Be used to support the objective carrier of object lens; With the coil that objective carrier meshes and has the yoke and a meticulous configuration of a permanent magnet, this coil has the tracking section of meticulous configuration and the focusing block of meticulous configuration, this coil and objective carrier engagement.And and this permanent magnet is constructed magnetic circuit together.
Fig. 1 is a skeleton view, represents conventional optical pick-up driving apparatus.
Fig. 2 is a decomposition diagram, represents conventional optical pick-up driving apparatus.
Fig. 3 A is the skeleton view of conventional tracking coil.
Fig. 3 B is the planimetric map of the conventional tracking coil of expression, to show magnetic direction and the magnetic force direction that is taken place by tracking coil.
Fig. 4 A is the skeleton view of conventional focusing coil.
Fig. 4 B is the planimetric map of the conventional focusing coil of expression, to show magnetic direction and the magnetic force direction that is taken place by focusing coil.
Fig. 5 is a figure, the coil of the meticulous configuration that adopts in the optical pick-up driving apparatus of expression first embodiment of the invention.
Fig. 6 is a skeleton view, the optical pick-up driving apparatus of expression first embodiment of the invention.
Fig. 7 A is a figure, and the coil of the meticulous configuration that is illustrated in the optical pick-up driving apparatus to be adopted is to show the running status of first embodiment of the invention.
Fig. 7 B is a figure, is illustrated in the focusing coil of the meticulous configuration that is adopted in a kind of optical pick-up driving apparatus, to show the running status of first embodiment of the invention.
Fig. 7 C is a figure, is illustrated in the tracking coil of the meticulous configuration that is adopted in a kind of optical pick-up driving apparatus, to show the running status of first embodiment of the invention.
Fig. 8 is a figure, is illustrated in the coil of the meticulous configuration that adopts in a kind of optical pick-up driving apparatus second embodiment of the invention.
Fig. 9 is a skeleton view, is illustrated in the coil of the meticulous configuration that adopts in a kind of optical pick-up driving apparatus second embodiment of the invention.
Figure 10 A is a figure, is illustrated in the meticulous configuration coil that adopts in a kind of optical pick-up driving apparatus, to show running status second embodiment of the invention.
Figure 10 B is a figure, is illustrated in the meticulous configuration focusing coil that adopts in a kind of optical pick-up driving apparatus, to show running status second embodiment of the invention.
Figure 10 C is a figure, is illustrated in the meticulous configuration tracking coil that adopts in a kind of optical pick-up driving apparatus, to show running status second embodiment of the invention.
The basic purpose of optical pick-up driving apparatus according to the present invention is the coil that focusing coil and tracking coil integral body is formed a meticulous configuration, thereby might follow the tracks of and focus under the coil of this meticulous configuration collaborative.
Because the structure of this optical pick-up driving apparatus and the structure of conventional optical pick-up driving apparatus are identical except the structure of the coil of meticulous configuration, only different structures will be described.
At first, as shown in Fig. 5 and Fig. 6, whole focusing coil and the tracking coil that forms the optical pick-up driving apparatus of first embodiment of the invention on a meticulous configuration coil 110.
The moulding of meticulous configuration coil 110 resembles a belt with certain width, and forms the rectangular box of upper and lower opening when folding it.
That is to say, when along the folding meticulous configuration coil 110 of fold line 111, on the similar face of the meticulous configuration coil 110 of band shape, form meticulous configuration tracking section 109 and meticulous configuration focusing block 104.In more detail, on two surface, form meticulous configuration tracking section 109 and meticulous configuration focusing block 104.In addition, on remaining two surfaces, form a plurality of welding portions 112 and they being welded on the predetermined portions of objective carrier 105.
Meticulous configuration focusing block 104 is to form with a pair of triangle pattern that separates each other, so that control focusing operation effectively on direction up and down.Meticulous configuration tracking section 109 is to form with a pair of triangle pattern that separates each other, so as left and on the direction to the right effectively control follow the tracks of operation.Therefore, meticulous configuration focusing block 104 and meticulous configuration tracking section 109 are rectangles.
On the same plane of meticulous configuration coil 110, form meticulous configuration tracking section 109 and meticulous configuration focusing block 104, this meticulous configuration coil 110 is to separate with the permanent magnet 114 that is installed on yoke 119 two ends, makes and the certain magnetic field of meticulous configuration coil 110 collaborative generations.
In the accompanying drawings, the insertion groove that reference number 106a representative forms on objective carrier, 113 represent sense of current, and 106 represent object lens, and 107 represent the lead spring.
Simultaneously, Fig. 8 represents a kind of optical pick-up driving apparatus second embodiment of the invention, it comprises meticulous configuration tracking section 211 and meticulous configuration focusing block 212, meticulous configuration tracking section 211 is engaged on the outside surface of objective carrier 205 and is formed on and makes on the both sides of objective carrier 205 and produce certain magnetic field with permanent magnet 214 is collaborative, and meticulous configuration focusing block 212 is formed on the core of the left side of objective carrier 205 and right lateral surface.
In the accompanying drawings, reference number 206a representative is formed on the insertion groove on the objective carrier, and 111 represent fold line 111.
As described above and with reference to figure 7A and Figure 10 A, can only utilize a kind of the reaching in meticulous configuration part 109 or the meticulous configuration part 211 to follow the tracks of and focus on, realize following the tracks of and focus on just purpose according to first and second embodiments of the present invention.
By meticulous configuration tracking section 109 and 211 and the power that produce by meticulous configuration focusing block 104 and 212 (F=B * I * L) drives object lens 106 and 206 according to the left hand theory of Fleming.
In more detail, Fig. 7 B represents the direction of the combining ability of electric current supplier between 113, this combining ability is used for the meticulous configuration focusing block 104 of the meticulous configuration coil 110 that separates with permanent magnet 114 and 214 is focused on, and makes to form suitable magnetic field and focus direction according to its electric current.
In addition, Fig. 7 C represents the direction of the combining ability of electric current supplier between 113, this combining ability is used for the meticulous configuration tracking section 109 of the meticulous configuration coil 110 that separates with permanent magnet 114 is followed the tracks of, and makes the tracking direction that forms suitable magnetic field according to its electric current.
In Figure 10 B, the direction in the magnetic field of reference character " B " representative meticulous configuration focusing coil 104 second embodiment of the invention, and " F " represents the direction of focusing force.In addition, in Figure 10 C, the direction in the magnetic field of reference character " B " representative meticulous configuration tracking coil 109 second embodiment of the invention, and " F " represents the direction of tracking power.
As described above, optical pick-up driving apparatus purpose according to the present invention is that focusing coil and tracking coil integrally are provided at grade, thereby no longer needs the interconnection process of tracking coil and focusing coil.
In addition, might reduce the number of times of assembling process, and compare product with prior art might be thinner.And might reduce mismachining tolerance, thereby can improve the performance of optical pick-up driving apparatus.
Although preferred forms of the present invention is disclosed by the purpose of signal, those skilled in the art are appreciated that various modifications under the prerequisite of scope and spirit illustrated in the appended claims book, increase and delete is possible.
Claims (4)
1. optical pick-up driving apparatus comprises:
The object lens of an optically focused;
An objective carrier that is used to support described object lens;
One and the engagement of described objective carrier also have the yoke of a permanent magnet; And
A coil that has the meticulous configuration of meticulous configuration tracking section and meticulous configuration focusing block, this coil are engaged to this objective carrier and constitute magnetic circuit together with described permanent magnet.
2. the device of claim 1, wherein the described meticulous configuration focusing block of this meticulous configuration coil is separated from one another with described meticulous configuration tracking section and is relative formation mutually.
3. the device of claim 1, wherein the described meticulous configuration focusing block of this meticulous configuration coil and described meticulous configuration tracking section are triangles.
4. the device of claim 1, wherein said meticulous configuration coil is included in a focusing coil of installing on the core of this objective carrier, and comprises along the tracking section of a meticulous configuration of the both sides formation of this meticulous configuration focusing block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96104221 CN1159050A (en) | 1996-03-01 | 1996-03-01 | Optical pick-up driving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96104221 CN1159050A (en) | 1996-03-01 | 1996-03-01 | Optical pick-up driving apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1159050A true CN1159050A (en) | 1997-09-10 |
Family
ID=5118309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96104221 Pending CN1159050A (en) | 1996-03-01 | 1996-03-01 | Optical pick-up driving apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1159050A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314022C (en) * | 2003-12-24 | 2007-05-02 | Lg电子株式会社 | Coil rotation preventing structure for optical pick-up actuator |
| CN1326127C (en) * | 2001-06-20 | 2007-07-11 | 索尼公司 | Objective lens device, optical pickup device, and optical information recording and/or reproduction device |
| CN100390879C (en) * | 2005-06-08 | 2008-05-28 | 三洋电机株式会社 | Objective-lens driving device |
-
1996
- 1996-03-01 CN CN 96104221 patent/CN1159050A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326127C (en) * | 2001-06-20 | 2007-07-11 | 索尼公司 | Objective lens device, optical pickup device, and optical information recording and/or reproduction device |
| CN1314022C (en) * | 2003-12-24 | 2007-05-02 | Lg电子株式会社 | Coil rotation preventing structure for optical pick-up actuator |
| CN100390879C (en) * | 2005-06-08 | 2008-05-28 | 三洋电机株式会社 | Objective-lens driving device |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |