CN100514460C - Optical pickup actuator - Google Patents
Optical pickup actuator Download PDFInfo
- Publication number
- CN100514460C CN100514460C CNB2005101323773A CN200510132377A CN100514460C CN 100514460 C CN100514460 C CN 100514460C CN B2005101323773 A CNB2005101323773 A CN B2005101323773A CN 200510132377 A CN200510132377 A CN 200510132377A CN 100514460 C CN100514460 C CN 100514460C
- Authority
- CN
- China
- Prior art keywords
- lens
- actuator
- optical pick
- coil
- bracket
- Prior art date
- 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.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1406—Reducing the influence of the temperature
- G11B33/1426—Reducing the influence of the temperature by cooling plates, e.g. fins
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1406—Reducing the influence of the temperature
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
Abstract
There is provided an optical pickup actuator for actuating a lens holder having an object lens according to an interaction between coils and magnets. The optical pickup actuator includes a lens-seating portion formed on the lens holder to support the object lens and a lens guide portion protruding from the lens-seating portion to securely support the object lens. The lens guide portion has an adhesive confining groove in which adhesive can be injected to securely fix the object lens.
Description
Technical field
The present invention relates to that data are write optical record medium or from the optical pick-up actuator of optical medium reading of data.
Background technology
Optical pick-up actuator is kept relative position between object lens and the optical record medium by the moving member that object lens are installed above moving in predetermined distance, and the track by following optical record medium is to write data optical record medium or from the optical record medium reading of data.
Optical pick-up actuator has permanent magnet and coil.When applying electric current on coil, optical pick-up actuator moves to object lens the position of expectation.In this, moving member moves up in orthogonal focus direction and track side.
Figure 1A and 1B are the synoptic diagram according to the optical pick-up actuator of prior art.
With reference to Figure 1A and 1B, optical pick-up actuator comprises and is used for the lens bracket 102 that the heart is therein partly installed object lens and had excircle, is twining tracking and focusing coil 106 and 105 around this excircle; Be installed in that pedestal (base) is gone up and with tracking and the focusing coil 106 and the 105 relative magnet 103 and the yokes 104 of lens bracket 102; Respectively has first end on the side that is fixed on lens bracket with a plurality of hoist cables (wire suspension) 107 of support lens frame 102; And be fixed with the shock mount 109 of second end of each hoist cable 107.
Describe optical pick-up actuator below in detail.
Yoke 104 is formed by the ferrimagnet projection.Yoke is relative with tracking coil 105 and 106 with focusing.Magnet is fixed on the front surface of corresponding yoke 104.Yoke 104 is fixed on the adapter pedestal (not shown).
Fixed head 108 is connected with lens bracket 102.First end of a pair of hoist cable 107 parallel to each other is fixed on each fixed head 108 by welding technology.Second end of hoist cable is inserted in the vibroshock of shock mount 109 regularly.
Vibroshock is connected the inside of vibration damping mounting 109, thereby the hoist cable that respectively has rigidity can have shock absorbing characteristics.The mainboard (not shown) is connected to the outside surface of shock mount 109.In fact second end of hoist cable 107 is fixed on the mainboard.
When on tracking coil 106, applying electric current, produce repulsive force and attractive force by the electromagnetic force between focusing coil 105 and the magnet 103.By this repulsive force and attractive force, lens bracket 102 moves in focus direction (vertical direction), thereby operation is used for the focus servo of compensating focusing error.
Above-mentioned optical pick-up actuator is a moving coil type, that is, focusing and tracking coil 105 and 106 move with the lens bracket 102 that is wound with focusing and tracking coil 105 and 106 on every side.
Also have the moving magnet type, that is, magnet is connected on the excircle of lens bracket, thereby moves with lens bracket.In this, utilize the long-range navigation thatch power of the mobile use Fu Linming left-hand rule of magnet and coil.
Above-mentioned optical pick-up actuator reads on optical record medium and writing information.In recent years, along with developing rapidly of multimedia system, and content of multimedia, for example recreation and film, the increase of capacity, required the optical pick-up actuator must long-time reliably stabilized driving multimedia system.
When long-time driving multimedia system, produce heat by the electric current that is applied on the optical pick-up actuator, and heat is delivered to object lens by lens bracket.
When the heat that is produced by coil is delivered to object lens for a long time the time, aberration increases.In addition, when excessive electric current was applied on the coil, because thermal stress, object lens may break.Therefore, exist improve the demand of the optical pick-up actuator that drives stability from coil to the heat of object lens transmission by minimizing.
Again, in the high speed optical pick-up actuator, even when using bonding agent that object lens are connected to lens bracket, because bounding force is inadequate, lens bracket may be different from object lens in frequency response.Just, the resonance peak of lens bracket may be greater than the resonance peak of object lens.
Therefore, also exist improving the demand of the optical pick-up actuator that drives stability by the decay resonance characteristic.
Summary of the invention
Therefore, the present invention relates to eliminate fully a kind of optical lens actuator of one or more problems that restriction and defective owing to prior art cause.
The purpose of this invention is to provide a kind of by making coil transmit minimized optical pick-up actuator to the heat of object lens at the side of lens bracket formation recess.
Another object of the present invention provides a kind ofly seals the optical pick-up actuator that is delivered to the heat of object lens from coil by the heat radiation groove of handling on the lens mount part of light beam through hole.
Another purpose of the present invention provides a kind of optical pick-up actuator that improves the bounding force of object lens by the glued construction between improvement lens bracket and the object lens.
Additional advantages of the present invention, purpose and characteristic, a part is illustrated in the following description, and another part will be significantly maybe can acquire from enforcement of the present invention by the investigation to following explanation for the ordinary skill in the art.Can realize and obtain the object of the invention and other advantage by the structure of in the instructions of literal and claims and accompanying drawing, pointing out especially.
For the advantage that obtains these purposes and other and according to purpose of the present invention, give particularly and description widely at this, a kind of optical pick-up actuator is provided, be used for driving the lens bracket with object lens according to the interaction between coil and the magnet, this optical pick-up actuator comprises: the lens mount portion that is formed on lens bracket upper support object lens; And it is outstanding perpendicular to this plane, lens mount portion place to support the camera lens guide part of object lens safely from lens mount portion, wherein this camera lens guide part has and can inject bonding agent within it and strengthen projection with the adhesive limit groove that firmly fixes object lens with the bonding agent that the bonding agent groove is divided into two parts.
In another technical scheme of the present invention, a kind of optical pick-up actuator is provided, be used for driving lens bracket with object lens according to the interaction between coil and the magnet, this optical pick-up actuator, wherein this lens bracket is provided with the heat radiation groove that does not directly contact tracking coil in the side.
In another technical scheme of the present invention, a kind of optical pick-up actuator is provided, comprise: lens bracket, have lens mount portion that is mounted with object lens in the above and the bobbin that twines focusing coil on every side, and the coil support portion of twining tracking coil on every side, wherein side outstanding and lens bracket is provided with the coil contact site of contact tracking coil and the heat radiation groove that does not contact tracking coil to coil support portion from the side of lens bracket.
The detailed description that is appreciated that the general description of front of the present invention and back is exemplary and indicative and aims to provide of the present invention further explanation to being advocated.
Description of drawings
Accompanying drawing is used to provide further understanding of the invention, and it is in this application combined and constitute the application's a part, and it shows embodiments of the invention and is used for explaining principle of the present invention with instructions.In the accompanying drawing:
Fig. 1 is the synoptic diagram according to the optical pick-up actuator of prior art; And
Fig. 2 to 4 is expression figure according to the optical pick-up actuator of the embodiment of the invention.
Embodiment
Now, will describe preferred implementation of the present invention in detail, embodiment is illustrated in the accompanying drawings.As much as possible, identical Reference numeral is used for whole accompanying drawings quoting to identical or similar portions.
Fig. 2 to 4 is expression figure according to the optical pick-up actuator of the embodiment of the invention.
With reference to Fig. 2 to 4, lens bracket 202 has the heat radiation groove 204 that is formed in the lens mount portion 209, in lens mount portion 209, be mounted with object lens 201, be formed on lens bracket 202 the opposite flank the supercentral second heat radiation groove 225 and be formed on the left side of each opposite flank of lens bracket 202 and the 3rd heat radiation groove 232 on the right half.
Be arranged in the lens mount portion 209 object lens 201 and lens mount portion 209 around light beam through hole 203 aim at.Camera lens guide part 211 is outstanding from lens mount portion 209, to support object lens 201 regularly.Camera lens guide part 211 forms along having the circumference of internal diameter greater than object lens 201 external diameters.
Camera lens guide part 211 upwards and towards the position at object lens place is opened.For example, camera lens guide part 211 about 90 ° of settings of can being separated by.Each camera lens guide part 211 has adhesive limit groove 212 and is used for adhesive limit groove 212 is divided into the bonding agent reinforcement projection 213 of two parts.Bonding agent is strengthened projection 213 and is extended towards object lens.
One or more reinforcement projections 213 with the height that highly is lower than camera lens guide part 211 can be formed on each camera lens guide part 211.
With reference to Fig. 4, after object lens 201 are placed in the lens mount portion 209, bonding agent is injected in the camera lens guide part 211.Bonding agent can be UV bonding agent or adherend.Because the inner structure of camera lens guide part 211, the bonding agent of injection can not leak out from camera lens guide part 211.In this, be formed in the adhesive limit groove 212 because bonding agent strengthens outstanding 213, the bounding force of bonding agent can improve greatly.
Along with bonding agent is applied between camera lens guide part 211 and the object lens 201, the bounding force that object lens 201 is bonded to lens bracket 202 further improves.
Therefore, when with high-speed driving lens bracket 202, it is identical with the resonance peak of lens bracket 202 that the resonance peak of object lens 201 becomes.
Simultaneously, the first heat radiation groove 204 is respectively formed on the relative part of lens mount portion 209 adjacent coils.By the first heat radiation groove 204, part object lens 201 are contact lense headstock portion 209 not.
Therefore, the heat that is delivered to object lens 201 by lens mount portion 209 can reduce.
Again, second heat abstractor be formed on lens bracket 202 the apparent surface in the heart.Second heat abstractor comprises the second coil contact site 223 and 224, and the part that will form coil support portion 221 and 222 on the second coil contact site 223 and 224 is raised, thus the upper and lower of tracking coil 206 contact coil support portion 221.Second heat abstractor also comprises the second heat radiation groove 225 of the part that the core of the inside surface that is formed on tracking coil 206 will contact.By the second heat radiation groove 225, part tracking coil 206 is the contact lense headstock 202 not.
Here, each second heat radiation groove 225 can form and have the big width of width than the second coil contact site 223 and 224 unevenly.
Again, the 3rd heat abstractor passes through to form to the apparent surface's of lens bracket 202 left side and right side stepping, and it is corresponding to the inside surface of the bobbin 230 that twines focusing coil 205 on every side.The 3rd heat abstractor comprises the 3rd contact site 231 of the upper and lower contact of focusing coil 205.The 3rd contact site 231 raises from the apparent surface of lens bracket 202.The 3rd heat abstractor also comprises the heat radiation of the 3rd on the apparent surface who is formed on lens bracket 202 groove 232.The 3rd heat radiation groove 232 is corresponding to the center section of focusing coil 205.Therefore, the center section of focusing coil is by the not direct contact lense headstock 202 of the 3rd heat radiation groove 232.
Each the 3rd heat radiation groove 232 can form unevenly and have and be limited to the width between the spool 230 up and down.Preferably, the width of the 3rd heat radiation groove 232 is bigger than the width of tertiary coil contact site 231.
The information slip on every side that coil is wrapped in the lens bracket 202 with above-mentioned first and second heat abstractors is shown among Fig. 3.
Coil can form different shape, such as rectangle or trapezoidal.
With reference to Fig. 3, tracking coil 206 is wrapped in around apparent surface's the center section of lens bracket 202, and focusing and radial coil 205 and 207 are wrapped in around apparent surface's the left side and right side of lens bracket 202.Tracking coil 206 is supported by coil support portion 221 and 222, and the center section of the inside surface of tracking coil 206 is far apart by the apparent surface of the second heat radiation groove 225 with lens bracket 202.Just, because the upper and lower of the inside surface of tracking coil 206 contacts the second coil contact site 223 and 224, so the center section of the inside surface of tracking coil 206 is by the not direct contact lense headstock 202 of the second heat radiation groove 225.Therefore, the heat that is produced and be delivered to object lens by tracking coil 206 can reduce.
In addition, focusing and radial coil 205 and 207 are dual windings.Focus on and the center section of radial coil 205 and 207 inside surface does not directly contact tracking coil 206 by the 3rd groove 232 that dispels the heat that steps in from tertiary coil contact site 231.Therefore, from focusing on and radial coil 205 and 207 generations and the heat that is delivered to object lens can reduce.
It will be apparent to one skilled in the art that in the present invention and can make various modifications and variations.Thereby, if they fall into claims and the scope that is equal within, the present invention will be contained these modifications and variations.
Claims (16)
1, a kind of optical pick-up actuator is used for driving the lens bracket with object lens according to the interaction between coil and the magnet, and this optical pick-up actuator comprises:
Be formed on the lens bracket to support the lens mount portion of object lens; And
It is outstanding supporting the camera lens guide part of object lens securely from lens mount portion perpendicular to this plane, lens mount portion place,
Wherein, this camera lens guide part has and injects bonding agent within it and strengthen projection with the adhesive limit groove that firmly fixes object lens with the bonding agent that the adhesive limit groove is divided into two parts,
Wherein, this lens bracket is provided with the heat radiation groove that does not directly contact tracking coil in the side.
2, according to the described optical pick-up actuator of claim 1, wherein, this camera lens guide part upwards and towards object lens is opened, so that bonding agent is injected in the space that limits between the inside surface of camera lens guide part and the object lens.
3, according to the described optical pick-up actuator of claim 1, wherein, this lens mount portion has the heat radiation groove that does not directly contact object lens.
4,, also comprise one or more additional camera lens guide parts according to the described optical pick-up actuator of claim 1.
5, a kind of optical pick-up actuator is used for driving the lens bracket with object lens according to the interaction between coil and the magnet, this optical pick-up actuator, and wherein, this lens bracket is provided with the heat radiation groove that does not directly contact tracking coil in the side.
6, according to the described optical pick-up actuator of claim 5, wherein, this lens bracket also is provided with the heat radiation groove that does not directly contact focusing coil in the side.
7, according to the described optical pick-up actuator of claim 5, wherein, this lens bracket also is provided with the heat radiation groove that does not directly contact radial coil in the side.
8, according to the described optical pick-up actuator of claim 5, wherein, this lens bracket has lens mount portion, and this lens mount portion has the heat radiation groove that does not directly contact object lens.
9, a kind of optical pick-up actuator comprises:
Lens bracket is mounted with the lens mount portion of object lens and twines the bobbin of focusing coil on every side above having, and the coil support portion of twining tracking coil on every side,
Wherein, side outstanding and lens bracket is provided with the coil contact site and the heat radiation groove that does not contact tracking coil that contacts tracking coil to this coil support portion from the side of lens bracket.
10, according to the described optical pick-up actuator of claim 9, wherein, side outstanding and lens bracket also is provided with the coil contact site and the heat radiation groove that does not contact focusing coil that contacts focusing coil to this bobbin from the side of lens bracket.
11,, also comprise being wrapped in bobbin radial coil on every side according to the described optical pick-up actuator of claim 10.
12, according to the described optical pick-up actuator of claim 9, also comprise: be formed in the lens mount portion with the camera lens guide part that supports object lens and be used to limit bonding agent securely object lens are fixed to the adhesive limit groove of camera lens guide part.
13, according to the described optical pick-up actuator of claim 12, wherein, this camera lens guide part comprises the bonding agent reinforcement projection that is used for the adhesive limit groove is divided into two parts.
14, according to the described optical pick-up actuator of claim 12, wherein, this camera lens guide part upwards and towards object lens is opened, so that bonding agent is injected in the space that limits between the inside surface of camera lens guide part and the object lens.
15, according to the described optical pick-up actuator of claim 12, wherein, this lens mount portion has the heat radiation groove that does not directly contact object lens.
16, according to the described optical pick-up actuator of claim 12, also comprise: one or more additional camera lens guide parts.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040109779 | 2004-12-21 | ||
| KR1020040109778A KR20060071251A (en) | 2004-12-21 | 2004-12-21 | Radiation structrus for lens holder of optical pick up actuator |
| KR1020040109778 | 2004-12-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1831969A CN1831969A (en) | 2006-09-13 |
| CN100514460C true CN100514460C (en) | 2009-07-15 |
Family
ID=36994206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101323773A Expired - Fee Related CN100514460C (en) | 2004-12-21 | 2005-12-21 | Optical pickup actuator |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20060071251A (en) |
| CN (1) | CN100514460C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011003252A (en) * | 2009-06-22 | 2011-01-06 | Hitachi Media Electoronics Co Ltd | Optical pickup device |
| JP6103291B2 (en) * | 2011-09-30 | 2017-03-29 | パナソニックＩｐマネジメント株式会社 | Optical pickup device, optical information device, and information processing device |
| KR102542645B1 (en) * | 2015-08-18 | 2023-06-14 | 엘지이노텍 주식회사 | Lens driving device, camera module and optical apparatus |
| CN109932799A (en) * | 2017-12-15 | 2019-06-25 | 南昌欧菲光电技术有限公司 | Lens barrel and lens module comprising the lens barrel |
-
2004
- 2004-12-21 KR KR1020040109778A patent/KR20060071251A/en not_active Application Discontinuation
-
2005
- 2005-12-21 CN CNB2005101323773A patent/CN100514460C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060071251A (en) | 2006-06-26 |
| CN1831969A (en) | 2006-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CI02 | Correction of invention patent application |
Correction item: Priority Correct: 2004.12.21 KR 10-2004-0109779 False: Lack of priority second Number: 37 Page: The title page Volume: 22 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: PRIORITY; FROM: MISSING THE SECOND ARTICLE OF PRIORITY TO: 2004.12.21 KR 10-2004-0109779 |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20151221 |