CN1753089A - Optical reading head actuator - Google Patents
Optical reading head actuator Download PDFInfo
- Publication number
- CN1753089A CN1753089A CNA2004100798732A CN200410079873A CN1753089A CN 1753089 A CN1753089 A CN 1753089A CN A2004100798732 A CNA2004100798732 A CN A2004100798732A CN 200410079873 A CN200410079873 A CN 200410079873A CN 1753089 A CN1753089 A CN 1753089A
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- electromagnet
- pedestal
- read
- optical reading
- reading head
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Abstract
The invention is an optical reading head actuator, where a base has first surface; three reading heads are all arranged on the first surface; a permanent magnet is arranged on a side of the base; three electromagnets correspond to the respective reading heads and are adjacently arranged on the base, and as the first electromagnet is electrified, it abstracts the permanent magnet to rotate the base to drive the first reading head to a preset position; as the second electromagnet is electrified, it abstracts the permanent magnet to rotate the base to drive the second reading head to a preset position; and as the second electromagnet is electrified, it abstracts the permanent magnet to rotate the base to drive the three reading head to another preset position. The invention can read/write three kinds of CDs in the same CD read/write equipment, improving the compatibility with different optical storage media.
Description
Technical field
The present invention relates to a kind of actuator that is used for the optical read head of optical record medium, particularly relate to a kind of in same optical read-write device, the actuator of the optical read head of three kinds of different optical Storage Medias such as read-write Blu-ray Disc, Video CD and general CD.
Background technology
In the modern times, optical record medium is by widely as the instrument that stores data, and along with the demand for information storage capacity day by day increases, so corresponding optical record medium of also developing with high storage capacity, Video CD sheet (Digital Versatile Disc for example, DVD), and the Blu-ray Disc sheet (BD of high power capacity more, Blue-ray Disc) etc., by highdensity recording mode, make the general common discs (CD, Compact Disc) of its storage volume high.
Different optical disc recording medium specifications, corresponding different wavelength of laser and different focusing distances carry out the read-write of data.Wherein, the Blu-ray Disc sheet is to be that the blue laser of 0.1mm is read and write with wavelength 400nm, focusing distance; The Video CD sheet is to be that the red laser of 0.6mm is read and write with wavelength 650nm, focusing distance; General common discs then is to be that the red laser of 1.2mm is read and write with wavelength 780nm, focusing distance.
Wherein, the Blu-ray Disc sheet has less ditch track gauge lattice and corresponding laser with shorter wavelength is read and write, therefore the Blu-ray Disc sheet is compared to discs and Video CD sheet, has more highdensity saving format, so may become in the following optical storage media market important leading role.
Because the different size of optical record medium, thus disc accessing must have the different wavelength of laser light source, with the different focal object lens under the operate as normal ability.In order to address this problem, known disc accessing utilizes an optical reading head actuator to carry out the conversion of two optical read heads, with the corresponding different types of disc of difference.
Please refer to optical reading head actuator shown in Figure 1, known 1 comprise a pedestal 11, one first optical read head 12, one second optical read head 13 ,-permanent magnet 14, one first electromagnet 15 and one second electromagnet 16.And optical reading head actuator 1 is in order to focus optical read head in a discs 100.
Wherein, pedestal 11 is the rotary type pedestal, and first optical read head 12, second optical read head 13 are arranged at respectively on the pedestal 11.
Yet, the optical reading head actuator 1 in the known technology, owing to only have two kinds of optical read heads, so optical reading head actuator 1 can only be changed two kinds of optical read heads.Therefore, can't be in same optical read-write device, three kinds of different optical Storage Medias such as read-write Blu-ray Disc sheet, Video CD sheet and general optical disk are so also caused the compatible not enough problem of optical read-write device.
Summary of the invention
Because above-mentioned problem, purpose of the present invention is for providing the optical reading head actuator of three kinds of different optical read heads of a kind of compatibility simultaneously.
Another object of the present invention is for providing a kind of optical reading head actuator, and it is used for reading while write Blu-ray Disc sheet, Video CD sheet and general optical disk.
For reaching above-mentioned purpose, according to optical reading head actuator of the present invention, it comprises:
One pedestal, it has a first surface;
One first read head, it is arranged at this first surface of this pedestal;
One second read head, it is arranged at this first surface of this pedestal;
One third reading is got head, and it is arranged at this first surface of this pedestal;
At least one permanent magnet, it is arranged at a side of this pedestal;
At least one first electromagnet, it is adjacent to this pedestal, and during this first electromagnet energising, this first electromagnet attracts this permanent magnet to make this pedestal rotate, and this first read head is brought to a precalculated position;
At least one second electromagnet, it is adjacent to this pedestal, and during this second electromagnet energising, this second electromagnet attracts this permanent magnet to make this pedestal rotate, and this second read head is brought to this precalculated position; And
At least one the 3rd electromagnet, it is adjacent to this pedestal, and during the energising of the 3rd electromagnet, the 3rd electromagnet attracts this permanent magnet to make this pedestal rotate, and this third reading is got head and is brought to this precalculated position.
From the above, because of complying with optical reading head actuator of the present invention, it has the optical read head of three kinds of different wave lengths, and has corresponding electromagnet.Compared to the prior art, optical reading head actuator of the present invention can be in same CD-disc read-write equipment, and read-write Blu-ray Disc sheet, Video CD sheet and general optical disk have significantly promoted the compatibility with the variety classes optical storage media.Therefore, the user does not need the optical storage media for different types again, and purchases different types of CD-disc read-write equipment, so increased user's convenience, has reduced the waste of resource yet.
Description of drawings
Fig. 1 is a schematic perspective view, shows known optical reading head actuator;
Fig. 2 is a schematic top plan view, shows the optical reading head actuator according to preferred embodiment of the present invention, and first optical read head is positioned at precalculated position P1;
Fig. 3 is another schematic top plan view, shows the optical reading head actuator according to preferred embodiment of the present invention, and wherein optical read head is provided with in pairs;
Fig. 4 is another schematic top plan view, shows the optical reading head actuator according to preferred embodiment of the present invention, and wherein permanent magnet is arranged at the summit of pedestal;
Fig. 5 is a schematic top plan view again, shows the optical reading head actuator according to preferred embodiment of the present invention, and wherein optical read head is provided with in pairs, and second optical read head is positioned at precalculated position P1;
Fig. 6 is a schematic top plan view again, shows the optical reading head actuator according to preferred embodiment of the present invention, and wherein optical read head is provided with in pairs, and the 3rd optical read head is positioned at precalculated position P1; And
Fig. 7 is a schematic top plan view again, shows the optical reading head actuator according to preferred embodiment of the present invention, more comprises control module and disc specification setup unit.
Symbol description among the figure:
1 optical reading head actuator
11 pedestals
12 first optical read heads
13 second optical read heads
14 permanent magnets
15 first electromagnet
16 second electromagnet
100 discs
2 optical reading head actuators
21 pedestals
211 first surfaces
212 sides
213 rotating shafts
22 first read heads
23 second read heads
24 third reading are got head
25,25 ' permanent magnet
26,26 ' first electromagnet
27,27 ' second electromagnet
28,28 ' the 3rd electromagnet
31 control modules
32 disc specification setup units
321 Auto-Sensing patterns
322 manual setting patterns
The P1 precalculated position
Embodiment
Hereinafter with reference to relevant drawings, the optical reading head actuator according to preferred embodiment of the present invention is described.
Optical reading head actuator of the present invention is used for a CD-disc read-write equipment, erasable general optical disk (CD), Video CD sheet (DVD) and Blu-ray Disc sheet (BD).
As shown in Figure 2, optical reading head actuator 2 comprises that a pedestal 21, one first read head 22, one second read head 23, a third reading get 24, at least one permanent magnet 25, at least one first electromagnet 26, at least one second electromagnet 27 and at least one the 3rd electromagnet 28.
First read head 22, second read head 23 and third reading are got 24 first surfaces 211 that are arranged at pedestal 21 respectively.
First read head 22, second read head 23 and third reading are got 24 and are respectively the light source with different wave length.Wherein, first read head 22 has the light source that a wavelength is 400nm, can be in order to read a Blu-ray Disc sheet (BD); Second read head 23 has the light source that a wavelength is 650nm, can be in order to read a Video CD sheet (DVD); Third reading gets 24, has the light source that a wavelength is 780nm, can be in order to read general optical disk (CD).
In the present embodiment, first read head 22, second read head 23 and third reading are got 24 and are had object lens respectively, can be with light-resource fousing to disc, to carry out the read/write of data.
Certainly, first electromagnet 26, one second electromagnet 27 and one the 3rd electromagnet 28 also can be paired setting.As shown in Figure 3, first electromagnet 26,26 ', second electromagnet 27,27 ' and the 3rd electromagnet 28,28 ' also can be paired setting.Thus, then can increase magnetic force.
As shown in Figure 2, at least one permanent magnet 25 is arranged at the side 212 of pedestal 21, in the present embodiment, can have two permanent magnets 25,25 ', and can be and relatively establish (as Fig. 3).Wherein, permanent magnet 25,25 ' has a N utmost point and a S utmost point respectively.Please refer to Fig. 4, permanent magnet 25,25 ' also can be arranged at the summit of sexangle pedestal 21.
Please refer to Fig. 3 again, first electromagnet 26,26 ' is adjacent to pedestal 21, in the present embodiment, first electromagnet 26,26 ' can be in pairs and establishes, when first electromagnet 26,26 ' energising, first electromagnet 26,26 ' attracts permanent magnet 25,25 ' to make pedestal 21 rotate with rotating shaft 213, and first read head 22 is brought to a precalculated position P1.Brought to first read head 22 of precalculated position P1, just can be carried out the action of read/write disc.Wherein, first electromagnet 26,26 ' utilizes coil (Coil) to be entwined, and promptly has magnetic behind the coil electricity, becomes an electromagnet.
As shown in Figure 5, second electromagnet 27,27 ' is adjacent to pedestal 21, in the present embodiment, second electromagnet 27,27 ' can be in pairs and establishes, when second electromagnet 27,27 ' energising, second electromagnet 27,27 ' attracts permanent magnet 25,25 ' to make pedestal 21 rotate with rotating shaft 213, and second read head 23 is brought to precalculated position P1.Brought to second read head 23 of precalculated position P1, just can be carried out the action of read/write disc.Wherein, second electromagnet 27,27 ' utilizes coil (Coil) to be entwined, and promptly has magnetic behind the coil electricity, becomes an electromagnet.
As shown in Figure 6, the 3rd electromagnet 28,28 ' is adjacent to pedestal 21, in the present embodiment, second electromagnet 28,28 ' can be in pairs and establishes, when the 3rd electromagnet 28,28 ' energising, the 3rd electromagnet 28,28 ' attracts permanent magnet 25,25 ' to make pedestal 21 rotate with rotating shaft 213, and third reading is got 24 quilt and brought to precalculated position P1.The third reading that is brought to precalculated position P1 gets 24, just can carry out the action of read/write disc.Wherein, the 3rd electromagnet 28,28 ' utilizes coil (Coil) to be entwined, and promptly has magnetic behind the coil electricity, becomes an electromagnet.
Please refer to Fig. 7, in the present embodiment, optical reading head actuator 2 more comprises a control module 31, and a disc specification setup unit 32.Control module 31 respectively with first electromagnet 26, second electromagnet 27 and the 3rd electromagnet 28 electrically connects.Disc specification setup unit 32 has an Auto-Sensing mode 3 21 and and manually sets mode 3 22, and disc specification setup unit 32 and control module 31 electrically connects, after the disc kind of CD-ROM drive is inserted in 32 judgements of disc specification setup unit, send a signal and give control module 31, and after control module 31 receives signal, then send signal to corresponding electromagnet, make the electromagnet energising to attract corresponding optical read head.
After the user inserts CD-ROM drive with disc, can in manual setting mode 3 22, manually set the form of the disc of inserting voluntarily, judge the time of disc kind to reduce optical reading head actuator 2.If do not set, then 2 of optical reading head actuators can utilize Auto-Sensing mode 3 21, detect the kind of disc voluntarily, then correct optical read head are brought to precalculated position P1, to carry out the read/write action of data.
For example, the disc of inserting a unknown kind is in CD-ROM drive, Auto-Sensing mode 3 21 tests through disc specification setup unit 32, it is a Blu-ray Disc sheet (BD), then control module 31 makes 26 energisings of first electromagnet, make pedestal 21 rotate, and first read head 22 is brought to precalculated position P1, can carry out the read/write action of Blu-ray Disc sheet.
In sum, optical reading head actuator of the present invention, it has the optical read head of three kinds of different wave lengths, and has corresponding electromagnet.Compared to the prior art, optical reading head actuator of the present invention can be in same CD-disc read-write equipment, and read-write Blu-ray Disc sheet, Video CD sheet and general optical disk have significantly promoted the compatibility with the variety classes optical storage media.Therefore, the user does not need the optical storage media for different types again, and purchases different types of CD-disc read-write equipment, so increased user's convenience, has reduced the waste of resource yet.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the described claim scope its equivalent modifications of carrying out or change.
Claims (10)
1. optical reading head actuator, it is used for a CD-disc read-write equipment, it is characterized in that, comprises:
One pedestal, it has a first surface;
One first read head, it is arranged at this first surface of this pedestal;
One second read head, it is arranged at this first surface of this pedestal;
One third reading is got head, and it is arranged at this first surface of this pedestal;
At least one permanent magnet, it is arranged at a side of this pedestal;
At least one first electromagnet, it is adjacent to this pedestal, and during this first electromagnet energising, this first electromagnet attracts this permanent magnet to make this pedestal rotate, and this first read head is brought to a precalculated position;
At least one second electromagnet, it is adjacent to this pedestal, and during this second electromagnet energising, this second electromagnet attracts this permanent magnet to make this pedestal rotate, and this second read head is brought to this precalculated position; And
At least one the 3rd electromagnet, it is adjacent to this pedestal, and during the energising of the 3rd electromagnet, the 3rd electromagnet attracts this permanent magnet to make this pedestal rotate, and this third reading is got head and is brought to this precalculated position.
2. optical reading head actuator as claimed in claim 1 is characterized in that this pedestal more comprises a rotating shaft, and this rotating shaft is positioned at the central authorities of this pedestal.
3. optical reading head actuator as claimed in claim 1 is characterized in that this pedestal is sexangle.
4. optical reading head actuator as claimed in claim 1 is characterized in that these read heads have the light source of different wave length respectively.
5. optical reading head actuator as claimed in claim 1 is characterized in that, this first read head has the light source that a wavelength is about 400nm.
6. optical reading head actuator as claimed in claim 1 is characterized in that, this second read head has the light source that a wavelength is about 650nm.
7. optical reading head actuator as claimed in claim 1 is characterized in that this third reading is got head, has the light source that a wavelength is about 780nm.
8. optical reading head actuator as claimed in claim 1 is characterized in that these read heads have object lens respectively.
9. optical reading head actuator as claimed in claim 1 is characterized in that, more comprises a control module, this control module respectively with this first electromagnet, this second electromagnet and the 3rd electromagnet electrically connect.
10. optical reading head actuator as claimed in claim 9, it is characterized in that, more comprise a disc specification setup unit, this disc specification setup unit has an Auto-Sensing pattern and manual setting pattern, this disc specification setup unit and this control module electrically connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100798732A CN100349220C (en) | 2004-09-23 | 2004-09-23 | Optical reading head actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100798732A CN100349220C (en) | 2004-09-23 | 2004-09-23 | Optical reading head actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1753089A true CN1753089A (en) | 2006-03-29 |
| CN100349220C CN100349220C (en) | 2007-11-14 |
Family
ID=36679896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100798732A Expired - Fee Related CN100349220C (en) | 2004-09-23 | 2004-09-23 | Optical reading head actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100349220C (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2981644B2 (en) * | 1995-09-14 | 1999-11-22 | 富士通株式会社 | Objective lens switching method for optical disk device |
| JP3611774B2 (en) * | 1995-12-28 | 2005-01-19 | オリンパス株式会社 | Optical head device |
| JPH09288835A (en) * | 1996-02-23 | 1997-11-04 | Matsushita Electric Ind Co Ltd | Objective lens driving device |
-
2004
- 2004-09-23 CN CNB2004100798732A patent/CN100349220C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN100349220C (en) | 2007-11-14 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20091023 |