CN1195163A - Actuator for optical pick-up - Google Patents
Actuator for optical pick-up Download PDFInfo
- Publication number
- CN1195163A CN1195163A CN97121535A CN97121535A CN1195163A CN 1195163 A CN1195163 A CN 1195163A CN 97121535 A CN97121535 A CN 97121535A CN 97121535 A CN97121535 A CN 97121535A CN 1195163 A CN1195163 A CN 1195163A
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- CN
- China
- Prior art keywords
- coil
- resin
- optical pickup
- pickup unit
- driver
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
To connect a bobbin to a suspension wire while reducing the number of components and the working man-hour. The optical pickup is provided with the bobbin 3 wound round with a focus coil 3c and a tracking coil 3b while holding an objective lens and four suspension wires 7a-7d for suspending the bobbin 3 so as to freely rock against an actuator base 1. In this case, end parts of the focus coil 3c and end parts of the tracking coil 3b are respectively connected to protrusions 3h-3k integrally molded on the bobbin 3, then each suspension wire 7a-7d is soldered respectively to each connected part.
Description
The present invention relates to the driver of optical pickup unit, particularly be used for structure to its focusing coil and tracking coil supply power.
With reference to Fig. 2, the schematic configuration of relevant existing optical pickup unit driver is described.Fig. 2 illustrates the oblique view that is used for the object lens of optical pickup unit are carried out along focus direction (direction of arrow F) and tracking direction (direction of arrow T) near the structure the driver of drive controlling.
Among Fig. 2,1 is the driver base, and it and not shown framework are mounted to one, and LASER Light Source and light receiving unit etc. is installed on the framework.Utilize not shown driving mechanism, drive this framework along the radial direction of CD, battle carry out so-called search operation.
Utilization is hung this coil rack 3 on focus direction and tracking direction from hanging 4 suspension line 7a～7d that base 2 extends out in the mode that can freely swing.That is, make from two suspension line 7a hanging that base 2 extends out and 7b and run through two lug 3d forming corresponding to the side of coil rack 3 and the hole of 3e respectively, each leading section of 7a and 7b is welded on the figure of printed circuit board (PCB) 6a; Two lug 3f that two other suspension line 7c and 7d run through respectively form corresponding to relative that side of coil rack 3 and the hole of 3g (not shown) are welded to each leading section of 7c and 7d on the figure of printed circuit board (PCB) 6b; Simultaneously, utilize bonding agent 8a～8d, the other end of 4 suspension line 7a～7d is fixed to hangs on the base 2, like this, coil rack 3 is hung.
Thereby when switching among suspension line 7a and the 7b, electric current flows in focusing coil 3c, and coil rack 3 is subjected to displacement on the direction of arrow F, changes object lens 5 and not shown CD 6s distance, carries out focus control.Similarly, when switching among suspension line 7c and the 7d, electric current flows in tracking coil 3b, and coil rack 3 is subjected to displacement on the direction of arrow T, and object lens 5 move on the direction of the channel (track) on the transversal not shown CD, carry out tracking Control.
But, in the illustrated existing optical pickup unit driver,, get involved substrate 6a here for focusing coil 3c and suspension line 7a and 7b are coupled together; Also have, for tracking coil 3b and suspension line 7c and 7d are coupled together, get involved substrate 6b, therefore, need substrate 6a and 6b, this causes that number of parts increases.Also have, need bond to operation on the coil rack 3 to printed circuit board (PCB), and each coil and each suspension line are welded to operation on the printed circuit board (PCB), increasing when this causes the millwright respectively.
The present invention proposes in view of the above problems, the 1st aspect of the present invention provides a kind of like this driver of optical pickup unit, this driver comprises resin coil skeleton and at least 4 electrically conductive elastic members, wherein, above-mentioned resin coil skeleton supports object lens, simultaneously focusing coil and tracking coil are wrapped on the periphery of first of this coil, above-mentioned at least 4 electrically conductive elastic members hang with respect to base this resin coil skeleton in the mode that freely swings; The terminal of the top of the terminal of the top of this focusing coil, this focusing coil, this tracking coil and this tracking coil twine respectively with integrated 4 projectioies of this resin coil skeleton on; These 4 electrically conductive elastic members are connected respectively on each wound portion.
The 2nd aspect of the present invention provides the present invention the 1st aspect described optical pickup unit driver, it is characterized in that: this resin coil skeleton utilization is carried out moulding to the high resin of welding thermotolerance.
The 3rd aspect of the present invention provides the present invention the 1st or the 2nd aspect described optical pickup unit driver, and it is characterized in that: this resin coil skeleton utilizes thermoset resin to carry out moulding.
Fig. 1 is the oblique view that near the structure of optical pickup unit driver of the present invention is shown;
Fig. 2 is the oblique view that near the structure of existing optical pickup unit driver is shown;
Fig. 3 utilizes trigonometry to represent the figure of structure of the coil rack of optical pickup unit driver of the present invention.
Below, with reference to Fig. 1 and Fig. 3, the optical pickup unit driver of the relevant embodiment of the invention is described.Structural detail corresponding elements with the illustrated existing optical pickup unit driver of reference Fig. 2 is marked with prosign, omits its explanation.
Fig. 1 is the oblique view that near the structure of optical pickup unit driver of the present invention is shown; Fig. 3 utilizes trigonometry to represent the figure of detailed structure of the coil rack of optical pickup unit driver of the present invention.
Because compare with the driver of the illustrated existing optical pickup unit in front, the difference of optical pickup unit driver of the present invention only is the structure of coil rack 3, so, the structure of relevant coil rack 3 mainly is described.
The coil rack 3 of optical pickup unit driver of the present invention utilizes thermoset resin or to the high plastic resin of welding thermotolerance (for example, Wholly aromatic polyester resin etc.) come moulding, the structure of formation and coil rack 3 integrated protruding 3h～3k replaces existing printed circuit board (PCB) 6a and the 6b that is bonded on the coil rack 3.And, the top of focusing coil 3c and terminal are wound into respectively on protruding 3h and the 3i, simultaneously, the top of tracking coil 3b and terminal are wound into respectively on protruding 3i and the 3k.
By welding, suspension line 7a and 7b are connected on the part of having twined focusing coil 3c on protruding 3h and the 3i respectively, suspension line 7c and 7d are connected on the part of having twined tracking coil 3b on protruding 3j and the 3k.
Thereby, as adopting the optical pickup unit driver relevant with present embodiment, then not only do not resemble the driver of existing optical pickup unit for tracking coil 3b and focusing coil 3c are connected to and need printed circuit board (PCB) 6a and 6b on suspension line 7a～7d, and can cut down these printed circuit board (PCB)s 6a and 6b are installed to the man-hour on the coil rack 3 and the man-hour of welding, so cheap more optical pickup unit driver can be provided.
By utilizing thermosetting resin or the high thermoplastic resin of welding thermotolerance being carried out moulding to coil rack 3, when being welded to suspension line 7a～7d on each wound portion, projection 3h～3k can perhaps not come off because of the softening transform that is heated, so can weld reliably.
Among the embodiment that has here illustrated, by making suspension line 7a～7d pass through the hole of lug 3d～3g respectively, each suspension line 7a～7d is positioned, but, also can omit these lugs 3d～3g, utilize anchor clamps that each suspension line 7a～7d is positioned, the front end of each line is welded on the coil that directly is wound on protruding 3h～3k.
As explained above such, as adopt optical pickup unit driver of the present invention, then each top of focusing coil and tracking coil and terminal be wound into the integrated projection of resin coil skeleton on, the electrically conductive elastic member is connected on each wound portion, the resin coil skeleton is hanging on the base in the mode that can freely swing, therefore, not needing to resemble the substrate of relaying being used the prior art is installed on the coil rack, so not only can reduce the number of part, and, do not need this substrate to be installed to the operation on the coil rack and coil and this substrate coupled together, and then the so-called dual operation that is connected that couples together with the electrically conductive elastic member, so can seek to reduce the man-hour of operation.
By utilizing thermosetting resin or welding thermotolerance high resin being carried out moulding to coil rack, when being welded to the electrically conductive elastic member on each wound portion, projection can not welded reliably because of being heated softening transform or come off.
Claims (3)
1. the driver of an optical pickup unit, this driver comprises resin coil skeleton and at least 4 electrically conductive elastic members, wherein, described resin coil skeleton supports object lens, simultaneously, focusing coil and tracking coil are wrapped on the periphery of described coil rack, and described at least 4 electrically conductive elastic members can hang described resin coil skeleton base in the mode that freely swings, it is characterized in that:
The terminal of the top of the terminal of the top of described focusing coil, described focusing coil, described tracking coil and described tracking coil be wound into respectively with integrated 4 projectioies of described resin coil skeleton on;
Described 4 electrically conductive elastic members are connected respectively on each wound portion.
2. according to the optical pickup unit driver described in the claim 1, it is characterized in that; The utilization of described resin coil skeleton is carried out moulding to the high resin of scolding tin thermotolerance.
3. according to the optical pickup unit driver described in claim 1 or 2, it is characterized in that; Described resin coil skeleton utilizes thermoset resin to carry out moulding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8307413A JPH10134405A (en) | 1996-10-31 | 1996-10-31 | Actuator of optical pickup |
| JP307413/96 | 1996-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1195163A true CN1195163A (en) | 1998-10-07 |
Family
ID=17968765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97121535A Pending CN1195163A (en) | 1996-10-31 | 1997-10-29 | Actuator for optical pick-up |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH10134405A (en) |
| CN (1) | CN1195163A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100336119C (en) * | 2002-04-03 | 2007-09-05 | 松下电器产业株式会社 | Method for making optical sensor |
| CN100426391C (en) * | 1999-10-27 | 2008-10-15 | 汤姆森特许公司 | Optical scanning device |
| CN1581346B (en) * | 2003-08-04 | 2011-05-11 | 三星电子株式会社 | Optical head activator and driving method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010064031A (en) * | 1999-12-24 | 2001-07-09 | 윤종용 | Optical pickup assembly |
| KR100431260B1 (en) * | 2001-08-29 | 2004-05-12 | 삼성전기주식회사 | Image module |
| KR100486267B1 (en) * | 2002-10-02 | 2005-05-03 | 삼성전자주식회사 | An optical pickup actuator and an optical disk drive using the same |
-
1996
- 1996-10-31 JP JP8307413A patent/JPH10134405A/en active Pending
-
1997
- 1997-10-29 CN CN97121535A patent/CN1195163A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426391C (en) * | 1999-10-27 | 2008-10-15 | 汤姆森特许公司 | Optical scanning device |
| CN100336119C (en) * | 2002-04-03 | 2007-09-05 | 松下电器产业株式会社 | Method for making optical sensor |
| CN1581346B (en) * | 2003-08-04 | 2011-05-11 | 三星电子株式会社 | Optical head activator and driving method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10134405A (en) | 1998-05-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |