CN1501372A - Optical pickup device and method and apparatus for assembling the same - Google Patents
Optical pickup device and method and apparatus for assembling the same Download PDFInfo
- Publication number
- CN1501372A CN1501372A CNA200310114863A CN200310114863A CN1501372A CN 1501372 A CN1501372 A CN 1501372A CN A200310114863 A CNA200310114863 A CN A200310114863A CN 200310114863 A CN200310114863 A CN 200310114863A CN 1501372 A CN1501372 A CN 1501372A
- Authority
- CN
- China
- Prior art keywords
- object lens
- aforementioned
- optical
- driving mechanism
- optical housing
- 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.)
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Classifications
-
- 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
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
-
- 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
- G11B7/082—Aligning the head or the light source relative to the record carrier otherwise than during transducing, e.g. adjusting tilt set screw during assembly of head
-
- 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
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0933—Details of stationary parts
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/22—Apparatus or processes for the manufacture of optical heads, e.g. assembly
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Provided is a device attaching an objective lens drive mechanism to an optical housing. Projections are provided at both upper ends of a frame constituting an outer frame of an objective lens drive mechanism at an objective lens side with respect to an optical housing, pivotally supporting parts consisting of recessed parts engaged with the projections are provided in the optical housing, a piercing hole through which the objective lens drive mechanism is attached to the optical housing with a screw is provided in the optical housing, and a screw hole with which the objective lens drive mechanism is screwed to the optical housing through the piercing hole are provided at a position of the objective lens drive mechanism separated from the pivotally supporting part, the screw is screwed to the screw hole through a spring disposed between the piercing hole and the objective lens drive mechanism, and the pivotally supporting parts are pressed by a pressing member.
Description
Technical field
The present invention relates to optical-head apparatus, be particularly related to the object lens driving mechanism is installed to the optical-head apparatus that assembles on the optical housing.
Background technology
To the optical-head apparatus that signal recording mediums such as disc read signal optically or write, have usually to control or to drive the object lens driving mechanism of object lens in the enterprising line focusing of assigned position in the mode of tracking Control.This object lens driving mechanism is installed in the optical housing, described optical housing form the aforementioned object lens of beam direction that will come from light source light path and will be by the light path of signal recording medium beam reflected direct light detecting device.
In the optical-head apparatus that constitutes the object lens driving mechanism being installed on the optical housing, can rotate on the tangential direction of object lens pivots (swing) supports the object lens driving mechanism, so that the coma of the luminous point on the signal recording medium becomes minimum mode, the optical axis of object lens is adjusted.
For example, the spy opens the disclosed optical-head apparatus of flat 11-328682 communique, has pivot support portion on the frame facet of the housing that constitutes the object lens driving mechanism.And, in framework, with constitute the pivot support portion side relative to the end of a side on, be provided with that to be used for the pivot support portion be the extension that axis of swing swings up and down aforesaid frame.The leaf spring that is fixed on the optical housing combines with the top of extension of aforesaid frame, and this framework is compressed against on the optical frame.On the other hand, in aforesaid frame, configuration adjustment bolt on the other end of a side that clips the aforementioned extension of ground, aforesaid pivoted support portion formation and opposition side thereof.And, by tightening or unclamping aforementioned adjusting bolt, the various camera lens postures of framework are adjusted with respect to aforementioned optical housing, posture can be fixed.
In addition, for example open the 2000-113470 communique the spy, He Te opens and discloses similar structure in the 2002-92897 communique.
The optical-head apparatus of Gou Chenging like this is to be provided with pivot support portion with the center of optical housing as the mode of rotation center.At this moment, pivot support portion as fulcrum, is applied the effect of power in aforementioned leaf spring side and adjusting bolt side both sides, form the state that stretches mutually from both sides.As a result, in the part of exerting pressure of the pivot support portion of optical housing and both sides, just in the optical housing, producing deformation load between pivot support portion and the leaf spring and between pivot support portion and the adjusting bolt.Because it is that the center for example is deformed into " く " font with the pivot support portion that deformation load makes optical housing, exist the optical axis at initial stage to change the possibility that changes with the optical axis of passing in time.And, though under the situation that can guarantee as the rigidity of the optical housing of the framework of optical pick-up, do not have big problem, but, owing to need slimming, the ultrathin typeization of optical housing now, so be difficult to guarantee the rigidity of optical housing, the influence that is caused by foregoing deformation load seems very remarkable.
And, the form of optical pickup unit, on the function from before CD regeneration to DVD regeneration development, and then, develop into CD write shared with DVD regeneration, CD writes and DVD writes functions such as shared, under this situation, the only very little optical axis that produces owing to previous reasons changes the fatal problem that just can become the optical pickup unit performance.
Summary of the invention
The objective of the invention is provides a kind of optical-head apparatus with simple structure, and this device has avoided acting on the deformation load on the optical housing, simultaneously, can carry out the stance adjustment of object lens driving mechanism in ground.
At this, in the optical-head apparatus of the present invention, on the upper end of the two sides of the framework of the housing that constitutes the object lens driving mechanism, the protuberance that protrudes to the object lens side with respect to optical housing is set.On the other hand, the recess that cooperates and form pivot support portion with aforementioned protuberance is set on optical housing.And, in aforementioned optical housing, be formed on through hole used when utilizing bolt that the object lens driving mechanism is installed.And, in the object lens driving mechanism that is fixed together via aforementioned through-hole and optical housing screw thread, leaving the screw that setting cooperates with aforementioned bolt thread on the position of aforementioned protuberance.And, be coupled in the recess, form under the state of pivot support portion at aforementioned protuberance, utilize pressing piece to push the aforesaid pivoted support portion.At this moment, as required, can between aforementioned through-hole and object lens driving mechanism, clamp members such as spring, again bolt thread is coupled in the screw.
And, preferably, pivot support portion and the object lens central shaft that is arranged on the two sides of optical housing is arranged on the same line.
And then preferably, aforementioned pressing piece adopts leaf spring etc.
Like this, by constituting the aforementioned lights head unit, as oscillation centre, can regulate the posture of object lens driving mechanism by the bolt that only is configured on optical housing one side with pivot support portion.That is, on the both sides of the pivot support portion that clips the framework that comprises the object lens driving mechanism, avoid being used to adjusting the effect of the power of posture, can prevent to produce the deformation load that makes the optical housing integrally bending become " く font " etc.At this moment, by force application components such as spring are installed in the threaded portion, the application of force that can utilize force application component to a direction stably to determining that by the threaded engagement of bolt the framework of posture pushes, thereby, can stablize and the posture of carrying out the object lens driving mechanism is constantly regulated and kept its posture.And,, can also avoid the generation of the unrelieved stress after posture is regulated by avoiding the generation of deformation load.
And, utilize above-mentioned such structure, in the optical housing of ultra-thin-wall, also be difficult for causing because the optical axis distortion that optical housing distortion causes, can guarantee initial performance, eliminate and a relevant key factor of mis-behave thereafter.And,, can suppress the change of lens posture even, also can avoid producing distortion for owing to the framework of realizing that ultrathin optical pickup unit descends rigidity.
And, being arranged on the same line by central shaft pivot support portion and object lens, the framework of swinging by threaded adjusting is the center swing with the center line of object lens.That is, even the object lens driving mechanism is carried out stance adjustment, object lens and also can not change with the distance of the disc (signal recording medium) of this object lens subtend.Thereby, can not produce focus variations, can easily carry out posture and regulate operation.And then, because on the straight line identical with the central shaft of object lens, utilize pressing piece to push positive top as the pivot support portion of aforesaid frame oscillation centre, so can easily carry out with the lens center with incide the adjustment that the optical axis actuator that coincide, tracking direction in the object lens moves.
In addition,, can more clearly understand the present invention, but design of the present invention is not subjected to the restriction of embodiment by with reference to following embodiment.
Description of drawings
Fig. 1 is the expansion skeleton view of deployed condition of the main member of expression optical-head apparatus according to an embodiment of the invention.
Fig. 2 is the skeleton view of the installment state of expression object lens driving mechanism in the optical-head apparatus of Fig. 1.
Embodiment
Fig. 1 is the expansion skeleton view of deployed condition of the main member of expression optical-head apparatus according to an embodiment of the invention, and Fig. 2 is the skeleton view of the installment state of expression object lens driving mechanism in the optical-head apparatus of Fig. 1.
Object lens driving mechanism 1 is that the lens keeper 3 that will object lens 2 be housed is supported on by four Support Level (wire) 4 (two of downsides are not shown in the drawings) and constitutes on the framework 5 of housing and constitute.
Various drive coils such as focusing coil and tracking coil are installed on lens keeper 3.Be supplied to the drive current of each drive coil,, drive object lens 2 by acting on the magnetic field that forms by object lens driving mechanism 1.
Object lens driving mechanism 1 to such formation drives, so that can make the object lens 2 that loaded focus of the light beam into the focus control on the signal face of disc and make the tracking Control of the signal track of pencil tracing disc.
On the other hand, optical housing 6 for example is made of aluminium casting (ア Le ミ ダ イ キ ヤ ス ト).In this optical housing 6, form the space 7 of configuration object lens driving mechanism 1, form the light path of the various optical element (not shown)s of configuration simultaneously.
As shown in Figure 1, protuberance 8a, 8b are formed respectively at the top in one of the framework 5 of object lens driving mechanism 1 distolateral two sides.
On the side walls in the space 7 that surrounds optical housing 6, with each corresponding position of protuberance 8a, 8b of aforesaid frame 5 on, forming pivots supports recess 9a, the 9b of described protuberance 8a, 8b.
When being installed to object lens driving mechanism 1 on the optical housing 6, each protuberance 8a, 8b of the framework 5 of object lens driving mechanism 1 is inserted among each corresponding recess 9a, 9b of optical housing 6.Utilize the joint of protuberance 8a, 8b and recess 9a, 9b to constitute pivot support portion 10a, 10b.Thereby object lens driving mechanism 1 can be the center swing with pivot support portion 10a, 10b.
Like this, be arranged on object lens driving mechanism 1 on the optical housing 6 again after, from the locational threaded hole 11 that insert bolt 13 via through hole 12 below of optical housing 6 and threaded engagement is separated to the protuberance 8a, the 8b that are arranged on object lens driving mechanism 1.Utilize such structure, object lens driving mechanism 1 is installed in the optical housing 6, simultaneously, can be used to make object lens driving mechanism 1 is the lens stance adjustment of center swing with aforementioned pivot support portion 10a, 10b.
And, after being inserted into each protuberance 8a, 8b among recess 9a, the 9b, dispose the pressing piece of making by for example sheet metal of formation such as sheet metal processing 15 in the mode that covers protuberance 8a, 8b.On pressing piece 15, form press section 15a, 15b, contact with aforementioned protuberance 8a, 8b.And, near press section 15a, 15b, on the direction of lower surface, be integrally formed leaf spring 15c, 15d, this leaf spring 15c, 15d one distolateral formation " く font ", another distolateral formation " font of falling L ".This leaf spring 15c, 15d tension force are installed among fixed orifice 16a, the 16b that is set in place on the optical housing 6 of the lower position of pivot support portion 10a, 10b.Thereby pressing piece 15 is pushed protuberance 8a, 8b, object lens driving mechanism 1 is remained on the optical housing 6, and simultaneously, can be that stably swing at the center with pivot support portion 10a, 10b.
In addition, as shown in Figure 1, by force application component, for example disc spring 14 being clipped in optical housing 6 and forming between the framework 5 of threaded hole 11, can be in a direction to determining that by the threaded engagement of screw thread 13 framework 5 of posture carries out stable pushing.Thereby, can stablize and carry out constantly the stance adjustment of object lens driving mechanism 1 and to the maintenance of its posture.Self-evident, for force application component, except disc spring,, can carry out suitable change to material and shape so long as can produce the stable member of exerting pressure.
As mentioned above, under the state that object lens driving mechanism 1 is installed on the optical housing 6, each protuberance 8a, 8b are inserted among each recess 9a, 9b, can be the center with the line that connects aforementioned each protuberance 8a, 8b, promptly be the center swing with the line that connects pivot support portion 10a, 10b.At this moment, the line that connects pivot support portion 10a, 10b preferably with the central shaft of object lens 2 on same straight line.In this case, if bolt 13 is regulated in rotation, then object lens driving mechanism 1 is the center swing with respect to optical housing 6 with the line that connects pivot support portion 10a, 10b, and the pendulum angle of above-below direction is adjusted.That is, object lens 2 are swung on the line that connects pivot support portion 10a, 10b, can carry out the tilt adjustments of the tangential direction of object lens 2.At this moment, even the posture of object lens 2 is adjusted, the distance of object lens 2 and disc can not change yet.That is, when object lens driving mechanism 1 is carried out stance adjustment, can not change, thereby be easy to carry out whole adjustment operation with respect to the distance of disc face.
If as prior art, at the central shaft of line that connects pivot support portion 10a, 10b and object lens 2 not under the situation on the same straight line, if with pivot support portion 10a, 10b is that benchmark is adjusted the posture angle of object lens 2, then the distance between object lens 2 and the disc also changes simultaneously, focus also changes, and becomes complicated thereby make to adjust to operate.
Like this, by constituting optical-head apparatus, be oscillation centre with pivot support portion 10a, 10b, utilize the bolt 13 on the side that only is configured in optical housing 6, can carry out the stance adjustment of object lens driving mechanism 1.That is, the masterpiece of avoiding being used for stance adjustment is used in the pivot support portion 10a that clips the framework 5 that comprises object lens driving mechanism 1, the both sides of 10b, can prevent to produce the deformation load make optical housing 6 integrally bendings become " く font " etc.At this moment, by disc spring 14 being installed in the part of bolt 13, utilize exerting pressure of disc spring 14, can be in a direction stably to determining that by the threaded engagement of bolt the framework 5 of posture pushes, thereby, can stablize and carry out constantly the maintenance of the stance adjustment and the posture thereof of object lens driving mechanism 1.And,, can also avoid the generation of the unrelieved stress after the stance adjustment by avoiding producing deformation load.
And, utilize said structure, even under the situation of ultra thin optical housing, also be difficult for causing because the optical axis change that optical housing 6 causes can be guaranteed initial performance, can eliminate and after this a relevant factor of mis-behave.And, for owing to the framework 5 of realizing that ultrathin optical pickup unit causes rigidity to descend, also can avoid producing distortion, can suppress the posture change of lens.
And then, being arranged on the same straight line by central shaft pivot support portion 10a, 10b and object lens 2, the framework of swinging by the adjusting of bolt 13 5 is the center swing with the center line of object lens 2.That is, even carry out the stance adjustment of object lens driving mechanism 1, can not take place yet object lens 2 and relative with this object lens 2 to disc (signal recording medium) between variable in distance.Thereby, focus variations can not take place, can easily carry out the stance adjustment operation.And then, with the same straight line at object lens central shaft place on, utilize pressing piece 15 to push positive top as pivot support portion 10a, the 10b of aforesaid frame 5 oscillation centres, thereby, can easily make the mobile adjustment of actuator of lens center and the tracking direction that incides the optical axis coincidence in the object lens.
Claims (5)
1, a kind of optical-head apparatus is characterized in that, comprising:
Comprise object lens, drive the object lens driving mechanism of these object lens,
The optical housing of the optical element of aforementioned object lens driving mechanism and regulation can be installed at least,
Aforementioned object lens driving mechanism is pushed the pressing member that is supported on the optical housing with freely swinging,
Aforementioned object lens driving mechanism has:
The protuberance that on the upper end of the two sides of the framework that constitutes housing, with respect to optical housing, protrudes to the object lens side,
Be formed at the locational threaded hole that leaves aforementioned convex portion, this threaded hole is installed to the object lens driving mechanism on the aforementioned optical housing and with the bolt thread of the posture of adjusting the object lens driving mechanism and cooperates,
Aforementioned optical housing has:
Engage, constitute the recess of pivot support portion with aforementioned protuberance,
Run through the through hole that inserts aforementioned bolt,
Aforementioned pressing member is pushed the protuberance of aforesaid pivoted support portion, can support this protuberance by pivot support portion with freely swinging, and is corresponding with the threaded engagement situation of aforementioned bolt, carries out the stance adjustment of object lens driving mechanism.
2, optical-head apparatus as claimed in claim 1 is characterized in that,
Carry out the bolt of the stance adjustment of aforementioned object lens driving mechanism, carry out threaded engagement in the mode that between aforementioned object lens driving mechanism and optical housing, clamps flexible member.
3, optical-head apparatus as claimed in claim 2 is characterized in that,
Aforementioned elastic component is by the disc spring of bolt-through.
4, optical devices as claimed in claim 1 is characterized in that,
With the line that is connected to form the pivot support portion on the two sides of aforementioned optical housing and the mode of central shaft on the same line of object lens, pivot support portion is set,
Aforementioned pressing piece is fixed on the optical housing on the lower position of pivot support portion, pushes aforementioned protuberance.
5, optical devices as claimed in claim 4 is characterized in that,
Aforementioned pressing piece by formation and the integrally formed leaf spring of this pressing piece on optical housing, and produces pressing force.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002329674A JP4549014B2 (en) | 2002-11-13 | 2002-11-13 | Optical head device |
| JP2002329674 | 2002-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1501372A true CN1501372A (en) | 2004-06-02 |
| CN1255790C CN1255790C (en) | 2006-05-10 |
Family
ID=32807603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101148633A Expired - Fee Related CN1255790C (en) | 2002-11-13 | 2003-11-07 | Optical pickup device and method and apparatus for assembling the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4549014B2 (en) |
| KR (1) | KR100525695B1 (en) |
| CN (1) | CN1255790C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7924513B2 (en) | 2007-04-10 | 2011-04-12 | Sony Corporation | Lens barrel |
-
2002
- 2002-11-13 JP JP2002329674A patent/JP4549014B2/en not_active Expired - Fee Related
-
2003
- 2003-11-07 CN CNB2003101148633A patent/CN1255790C/en not_active Expired - Fee Related
- 2003-11-12 KR KR10-2003-0079656A patent/KR100525695B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7924513B2 (en) | 2007-04-10 | 2011-04-12 | Sony Corporation | Lens barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4549014B2 (en) | 2010-09-22 |
| KR100525695B1 (en) | 2005-11-03 |
| CN1255790C (en) | 2006-05-10 |
| KR20040042840A (en) | 2004-05-20 |
| JP2004164750A (en) | 2004-06-10 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060510 Termination date: 20141107 |
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| EXPY | Termination of patent right or utility model |