CN1503240A - Leading-axle regulator for optical disc driver - Google Patents
Leading-axle regulator for optical disc driver Download PDFInfo
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- CN1503240A CN1503240A CNA021454388A CN02145438A CN1503240A CN 1503240 A CN1503240 A CN 1503240A CN A021454388 A CNA021454388 A CN A021454388A CN 02145438 A CN02145438 A CN 02145438A CN 1503240 A CN1503240 A CN 1503240A
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Abstract
An invention of a pilot shaft regulation device of a CD drive is to regulate the separation difference between main shaft motors of an optical pickup and a rotating CD moving after a pilot shaft mounted on the base. At the end of the main shaft motor of the said pilot shaft, an off-center cam and an elastic part mutually contact face to face to make the designed diameter of the shaft frame supporting part supporting the said pilot shaft larger than the outer diameter of the pilot shaft by a space, so to regulate its position based on the rotation of the cam mounted on the base with specific screws, the cam rotates according to rotation of the regulated screws.
Description
(1) technical field
The present invention relates to a kind of leading axle adjusting gear of CD drive, belong to the field of CD drive, refer in particular to and allow the leading axle adjusting gear of the CD drive that light picker can more accurate search CD content.
(2) background technology
Fig. 1 is the formation with the CD drive base of planimetric map diagram prior art.Shown in these drawings, light picker 3 is installed on the base 1, and can carries out the linear reciprocation action.Above-mentioned base 1 is, generally is installed on the main substrate (not diagram), and is the center with its rear end, and its line segment can the lifting certain angle.
Above-mentioned light picker 3 is that light is penetrated on the tracer signal face of CD, and the light that comes out of detection of reflected, its tracer signal or play the signal of record on the signal recording surface of CD.Above-mentioned light picker 3 is on above-mentioned base 1, is directed axle 4,4 ' guiding, and carries out the linear reciprocation action.Above-mentioned here leading axle 4,4 ' is to be known as guiding main shaft 4 and guiding countershaft 4 '.
The both ends of this leading axle 4,4 ' are by the bracing strut 5 on the above-mentioned base 1, and 5 ' 6,6 ' supports.So bracing strut 5, and 5 ' 6,6 ' is to have other model to form, and concludes with screw on above-mentioned base 1.Here we can learn, above-mentioned each leading axle 4,4 ' be respectively by bracing strut 5,5 ' 6,6 ' fixed support.
Simultaneously, the driving force that moves above-mentioned light picker 3 is that normally by transmitting motor (diagram does not provide), the driving force of above-mentioned transmission motor is to be conveyed to above-mentioned light picker 3 by lead screw (not diagram).
On the front end of above-mentioned base 1, the Spindle Motor 7 of the driving force that rotary CD is provided is installed.The lower end of above-mentioned Spindle Motor 7 is equipped with the substrate 8 of controlling its driving.
1 li embedding of above-mentioned then base has a plurality of fixed bars 9, the outside of said fixing bar 9 is inserted with spring (not diagram) at this moment, above-mentioned spring is mounted between the lower end of above-mentioned base 1 and aforesaid substrate 8 top, and aforesaid substrate is supported to the direction from base 1.
In addition, on the said fixing bar 9, connect aforesaid substrate 6 oblique screw rod (not diagram) is installed, above-mentioned oblique screw rod is to have the function that also has the distance of the top and above-mentioned base 1 of adjusting aforesaid substrate 8 between following when aforesaid substrate 8 is fixed on the function of above-mentioned base 1.In fact above-mentioned oblique screw rod is a height of adjusting Spindle Motor 7, allows light harvesting on the true signal recording surface of vertically injecting above-mentioned CD of the light positive of above-mentioned light picker irradiation.Simultaneously, the operation of the oblique screw rod of above-mentioned adjustment is referred to as skew adjustment (skew).
The upper end of above-mentioned Spindle Motor 7 is that universal stage (not diagram) is installed.Above-mentioned universal stage is to be rotated by above-mentioned Spindle Motor 7 under the state of laying CD, with this rotary CD.
Then, in above-mentioned CD drive, the center of the Spindle Motor 7 of rotary CD and the distance between the leading axle 4 and CD recording signal or read the mirror center of light picker 3 of signal and above-mentioned guiding main shaft 4 between be referred to as branch deviation (Offaxis) apart from difference, this is with tracing property very big relation to be arranged.
But, following problem is arranged as above-mentioned situation existing technical.
On above-mentioned prior art, guide the leading axle 4 of above-mentioned light picker 3,4 ' is fixedly supported on the base 1, above-mentioned Spindle Motor 7 also is mounted on the base 1, therefore can not move on the surface of above-mentioned base 1, so, can not adjust the branch deviation between above-mentioned light picker 3 and the Spindle Motor 7, can only manage with mechanical tolerance.But the deviation that tolerance takes place strengthens, and during the situation such as bad of accessory size, separates missionary society to increase, and therefore the action (Playability) to CD brings bad influence.
(3) summary of the invention
So, the objective of the invention is to adjust the light picker of CD drive and the branch deviation between the Spindle Motor by leading axle in order to solve above-mentioned prior art problem.
The object of the present invention is achieved like this:
A kind of leading axle adjusting gear of CD drive comprises with lower member:
Be installed on the base leading axle of direct light pick-up side by side;
Be installed on the described base, can adjust facility with the cam of distance that the contacted use cam of periphery of an end of described leading axle is adjusted the light center of described light picker emission; And
Described cam is adjusted facility are adjacent to described leading axle with elasticity elastomeric element.
Described cam is adjusted facility and is made up of following parts: be installed on the described base, be adjacent to the periphery of described leading axle one end, and make the offset cam of its periphery off-centre and described offset cam is fixed on the described base, and receive the adjustment screw of the driving force of rotating eccentricity cam.
The two ends of described leading axle are supported by each bracing strut, and described elastomeric element is to become one with described bracing strut, allows it have elasticity.
Effect of the present invention:
As described above, be that the branch deviation of rotary CD driver is adjusted screw, adjusts easily and accurately according to the leading axle adjusting gear of CD drive of the present invention.
Separate difference according to above-mentioned adjustment, when having eccentric dvd playback, when skipping (Skip) or scanning search (Scan search), can guarantee the action security of CD, remove the branch deviation equivalence fruit that the reason such as bad according to the deviation of tolerance and accessory size takes place during assembling fully.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Shown in Figure 1 is according to the planimetric map of the formation of the base of the CD drive of prior art;
Shown in Figure 2 is according to the planimetric map of the formation of the base that possesses the leading axle adjusting gear of embodiments of the invention;
Shown in Fig. 3 a is the planimetric map of formation of the major part of the embodiment of the invention;
Shown in Fig. 3 b is the sectional drawing of formation of the major part of the embodiment of the invention;
Shown in Figure 4 is the planimetric map of the operating state of the embodiment of the invention.
(5) embodiment
Below, describe the embodiment that possesses said structure with reference to the accompanying drawings in detail according to CD drive leading axle adjusting gear of the present invention.
Shown in Figure 2 is, adopts the planimetric map of formation of base of embodiment of the leading axle adjusting gear of the embodiment of the invention, and Fig. 3 is the formation that illustrates the leading axle adjusting gear of the embodiment of the invention with planimetric map and sectional drawing.
Shown in these drawings, be installed in and on the base 30 of main substrate (do not have diagram) light picker 32 be installed and can move.Above-mentioned light picker 32 is irradiates lights on the CD signal record surface of rotation, with this tracer signal or read signal.
The two ends of above-mentioned leading axle 34,34 ' are supported by the bracing strut on the above-mentioned base 30 35 respectively.Above-mentioned bracing strut 35 be with above-mentioned base 30 installation forming together be one, also fabrication and installation in addition.Support portion 36 is ends of the above-mentioned leading axle 34,34 ' of support among the figure, also supports an end of the Spindle Motor 40 of above-mentioned leading axle 34,34 '.34 is guiding main shafts simultaneously, 34 ' guiding countershaft.Here the support portion 36 of Spindle Motor 40 ends of supporting guide main shaft 34 is bigger than the diameter of above-mentioned guiding main shaft 34, has certain spacing C.
Then, on the above-mentioned base 30 Spindle Motor 40 is installed.Above-mentioned Spindle Motor 40 provides the power of rotary CD, installs by the substrate on the above-mentioned base 30 42.When aforesaid substrate 42 is mounted in 40 1 ends of above-mentioned Spindle Motor, be installed on the above-mentioned base 30 by a plurality of screws 43.At this moment, elastomeric element (not diagram) is installed between above-mentioned base 30 and the substrate 42, can adjusts the levelness to CD of above-mentioned Spindle Motor 40.
The adjustment facility of the offset cam 50 of adjusting the branch deviation are installed on above-mentioned Spindle Motor 40 ends of above-mentioned leading axle 34 simultaneously, then be that the periphery of the eccentric offset cam 50 that forms of rotation center contacts with an end periphery of above-mentioned leading axle 34 in a side of above-mentioned base 30.Then, above-mentioned offset cam 50 is to connect above-mentioned base 30, is concluded the adjustment screw of offset cam 50 and concludes on above-mentioned base 30.So constitute referring to shown in Fig. 3 b.
Then above-mentioned leading axle 34 apart from the relative periphery that is installed in above-mentioned leading axle 34 of above-mentioned offset cam 50 and elastomeric element 54 in the centre.Above-mentioned elastomeric element 54 is become one with above-mentioned bracing strut 35, and possesses the elastic body of its material and vivid characteristic.In the present embodiment, above-mentioned elastomeric element 54 is that front end one side at above-mentioned bracing strut 35 forms with certain-length.
Below, the leading axle adjusting gear according to CD drive of the present invention that possesses said structure is described.
Above-mentioned light picker 32 is according to the driving force that transmits motor, along above-mentioned leading axle 34,34 ' guiding and mobile.Above-mentioned light picker 32 is along 34, the 34 ' guiding of above-mentioned leading axle, and irradiation is according to the CD light of the driving force rotation of above-mentioned Spindle Motor 40, with this tracer signal or read signal.
The branch deviation of the gap of the range difference M between the center line of distance P between the center line of the mirror center of above-mentioned light picker 32 and above-mentioned leading axle 34 and above-mentioned leading axle 34 is to adjust according to the above-mentioned adjustment screw 52 of rotation simultaneously.
The little part of radius that Fig. 3 a illustrates above-mentioned offset cam 50 contacts with above-mentioned guiding main shaft 34, above-mentioned guiding main shaft 34 is pushed open by the elastic force of above-mentioned elastomeric element 54, has produced the state of spacing C between the left side of above-mentioned support portion 36 reference field and guiding main shaft 34.
Then, Fig. 4 is that the big part of radius that illustrates above-mentioned offset cam 50 contacts with above-mentioned guiding main shaft 34, has produced the state of spacing C between the left side of above-mentioned support portion 36 reference field and guiding main shaft 34.
The position of adjusting above-mentioned guiding main shaft 34 is described here.Above-mentioned offset cam 50 is to rotate according to the above-mentioned adjustment screw 52 of rotation.The radius of the periphery of above-mentioned offset cam 50 is different with rotation center, overcomes the resilient movement of an end of above-mentioned guiding main shaft 34 at the above-mentioned elastomeric element 54 of above-mentioned support portion 36 when therefore rotating.
According to the position of adjusting above-mentioned guiding main shaft 34, adjust the branch deviation of CD drive, above-mentioned minute deviation is more near 0 just executive logging and playback action more accurately.
In addition, set the branch deviation with the actual design value in the present embodiment.The cumulative limit of branch deviation is to be 0.15mm at light picker 32 on the common batch process level, and the inscape on base 30 is-0.15mm, so setting range is to be set at 0.5mm.
Between the center line of the center of above-mentioned Spindle Motor 40 and above-mentioned guiding main shaft 34 is to change between assembling the time can allow 24.35 to 24.65 apart from M, before the adjustment of minute deviation, suppose above-mentionedly, utilize the elasticity of above-mentioned elastomeric element 54 that light picker 32 is set at 24.3 apart from having on the M-tolerance.
Then, the M of Fig. 2 and P value are that expression utilizes above-mentioned offset cam 50 to adjust the scope of distances, and the setting range when offset cam 50 Rotate 180s are spent is 0.5mm, suppose that the center of light picker 32 has+tolerance after, setting range is set at bigger than 24.65.Do not limit the adjustment direction this moment.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (4)
1, a kind of leading axle adjusting gear of CD drive is characterized in that described adjusting gear comprises with lower member:
Be installed on the base leading axle of direct light pick-up side by side;
Be installed on the described base, can adjust facility with the cam of distance that the contacted use cam of periphery of an end of described leading axle is adjusted the light center of described light picker emission; And
Described cam is adjusted facility are adjacent to described leading axle with elasticity elastomeric element.
2, the leading axle adjusting gear of CD drive as claimed in claim 1 is characterized in that described cam adjusts facility and be made up of following parts:
Be installed on the described base, be adjacent to the periphery of described leading axle one end, and make the offset cam of its periphery off-centre; And
Described offset cam is fixed on the described base, and receives the adjustment screw of the driving force of rotating eccentricity cam.
3, the leading axle adjusting gear of CD drive as claimed in claim 1, the two ends that it is characterized in that described leading axle are to be supported by each bracing strut, and described elastomeric element is to become one with described bracing strut, allows it have elasticity.
4, as the leading axle adjusting gear of claim 2,3 described CD drive, it is characterized in that described cam is adjusted facility and described elastomeric element is in described leading axle, be installed in the correspondence position of the end of the Spindle Motor that guides main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021454388A CN1503240A (en) | 2002-11-20 | 2002-11-20 | Leading-axle regulator for optical disc driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021454388A CN1503240A (en) | 2002-11-20 | 2002-11-20 | Leading-axle regulator for optical disc driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1503240A true CN1503240A (en) | 2004-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021454388A Pending CN1503240A (en) | 2002-11-20 | 2002-11-20 | Leading-axle regulator for optical disc driver |
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|---|---|
| CN (1) | CN1503240A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100361205C (en) * | 2004-11-29 | 2008-01-09 | 华硕电脑股份有限公司 | Electronic device with regulating read and writing head |
| CN101647067B (en) * | 2007-03-19 | 2013-02-13 | 柯尼卡美能达精密光学株式会社 | Method for manufacturing optical pickup device, and optical pickup device |
-
2002
- 2002-11-20 CN CNA021454388A patent/CN1503240A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100361205C (en) * | 2004-11-29 | 2008-01-09 | 华硕电脑股份有限公司 | Electronic device with regulating read and writing head |
| CN101647067B (en) * | 2007-03-19 | 2013-02-13 | 柯尼卡美能达精密光学株式会社 | Method for manufacturing optical pickup device, and optical pickup device |
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| C06 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |