CN100485793C - Pick-up feeder, information regenerator and information recorder - Google Patents
Pick-up feeder, information regenerator and information recorder Download PDFInfo
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- CN100485793C CN100485793C CNB2005101246245A CN200510124624A CN100485793C CN 100485793 C CN100485793 C CN 100485793C CN B2005101246245 A CNB2005101246245 A CN B2005101246245A CN 200510124624 A CN200510124624 A CN 200510124624A CN 100485793 C CN100485793 C CN 100485793C
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Abstract
A pickup drive unit is provided including at least a rack portion provided thereon with gear teeth to be engaged with grooves of a lead screw; a plate-shaped connecting portion made of a flexible material for connecting the rack portion to a fixing portion tightened to a pickup and for supporting the rack portion in a cantilever fashion to be deformable in a direction of either bringing close to, or removing from, the lead screw; and a compressed coil spring for applying a force pressing the rack portion against the lead screw; in which the distance on the plate-shaped connecting portion from an end on the side of the fixing portion to the contact portion between the gear teeth and the lead screw is made smaller than the distance from an end on the side of said fixing portion to another end on the side of the rack portion. With the present construction, the gear teeth provided on the rack portion can be prevented from riding across the grooves on the lead screw, which is caused by a frictional force from the rotation of the lead screw in the tangential direction. In addition, the reduction of frictional loads, the increase in record/playback signal qualities, high speed access, and miniaturization can be achieved for the pickup drive unit.
Description
The application's denomination of invention that to be Ricoh Co., Ltd submit on November 5th, 2002 number is 02150348.6 divide an application for the Chinese patent application of " pick-up feeder, information regenerator and information record carrier ".
Technical field
The present invention relates to make the mobile pick-up feeder of optical pickup unit (pick-up), information regeneration (playback) device and information record carrier, above-mentioned optical pickup unit makes the rayed optical information recording media.
Background technology
Figure 11 represents that pick-up feeder constituted oblique view in the past, the various adapters that are used to make the optical element of rayed CD are carried in symbol 61 expression, 62 expressions make adapter 61 search for the axis of guide that adapter 61 is led when mobile along the CD radial direction, the leading screw that 63 expressions are made of cylindrical shaft, on this cylindrical shaft, be provided with the spiral fashion slot part, 64 expression motors.Above-mentioned leading screw 63 is connected with motor 64, is driven revolution.At this moment, make that the central shaft of above-mentioned leading screw 63 is consistent with the revolving shaft of motor 64 and connecting.
The extensions that fixed part 66 forms L fonts part and extends along adapter 61 bottom surfaces from the both sides, bight of this L font part, above-mentioned L font partly comprise the face that a bottom surface and the side with adapter 61 joins; One end of connecting portion 68 is connected with the leading section of the extension of said fixing portion 66, is the semi-girder shape, and the tooth-strip part 67 that is provided with tooth portion 69 is connected with the other end of connecting portion 68.In addition, the tooth portion of tooth-strip part 67 69 forms the back side and the mutual subtend of wall of fixed part 66 of faces, and configuration compression helical spring 70 between the above-mentioned back side and wall makes tooth-strip part 67 and above-mentioned leading screw 63 crimping.
And because tooth portion 69 and the slot part engagement of being located on the above-mentioned leading screw 63, if drive leading screw 63 revolutions, adapter 61 moves axially along leading screw 63.
In this structure, because the revolution of above-mentioned leading screw 63, tooth portion 69 produces friction force with the contact site of leading screw 63, the tabular relatively connecting portion 68 of this friction force has moment of flexure, gyratory directions difference according to above-mentioned leading screw 63, the power that is produced or make tooth-strip part 67 and leading screw 63 crimping, or tooth-strip part 67 and leading screw 63 are broken away from.
Figure 12 is near the figure of the lead screw shaft mate of the leading screw of seeing Figure 11 and connecting portion, and when seeing, tooth bar body 65 roughly is the F font from lead screw shaft.
Shown in Figure 12 A, when the gyratory directions of above-mentioned leading screw 63 is clockwise direction,, make tooth-strip part 67 break away from leading screw 63 along the A direction because the friction force F1 of tangential direction applies moment M 1 to connecting portion 68.In contrast, shown in Figure 12 B, when the gyratory directions of above-mentioned leading screw 63 is counter clockwise direction,, make tooth-strip part 67 along B direction crimping leading screw 63 because friction force F2 applies moment M 2 to connecting portion 68.
If make adapter 61 high-speed mobile, drive leading screw 63 high speed rotaries, then causing the gyratory directions that breaks away from direction power, the slot part of leading screw 63 is easily crossed by tooth portion 69, therefore, must strengthen compression helical spring 70 pushing forces.In contrast, in the gyratory directions occasion that causes crimping direction power, make tooth-strip part 67 with necessary above powerful pushing leading screw 63.If the power of tooth-strip part 67 pushing leading screws 63 becomes brute force, the frictional resistance in the contact site between tooth portion 69 and leading screw 63 slot parts just increases, and can not successfully realize the small feeding of adapter 61 in writing down or resetting, and causes that the record reproducing quality is low.And the resistance when making adapter 61 high-speed mobile also increases, and harms the zero access action.
In order to address the above problem, proposed to open the technology that the 2000-67534 communique is put down in writing as Japanese patent laid-open 11-185407 communique and Jap.P. spy.
Open the spy and to put down in writing following technology in the flat 11-185407 communique: will be made as circular-arc with the tooth top of leading screw groove engagement, the centre of gyration of this circular-arc elastic deflection with arm is the center, even because of the leading screw revolution has friction force in the tangential direction effect, also make engagement often keep certain.
Open the spy and to put down in writing following technology in the 2000-67534 communique: by with two parallel resin springs supporting tooth-strip parts, improve rigidity, prevent that tooth portion from crossing the groove of leading screw the moment of flexure of the revolution tangential direction of leading screw.
But, open in the flat 11-185407 communique the spy, even arm deflection, the distance of tooth top and leading screw is constant, therefore, if the guiding parts of adapter and the relative distance of leading screw or the size of arm have error, then tooth top can not be with the suitable silk pressing thick stick of trying hard to recommend, probably bad in the contact site cooperation, or friction load becomes big.
Open in the 2000-67534 communique the spy, the technology of being put down in writing is because the size of the length direction of resin spring and thickness direction is big, the equipment miniaturization difficulty.Especially, in the thin compact disc device in being built in laptop, not only short transverse and also in lead screw shaft to also must miniaturization, resin spring portion with drive the rotating motor of leading screw and can interfere, can not miniaturization.
Summary of the invention
The present invention system puts forward in view of the existing problem of above-mentioned prior art, the objective of the invention is to, pick-up feeder is provided, information regenerator and information record carrier, the tooth portion of the tooth-strip part that the moment that is produced by the revolution tangential direction friction force that reduces because of leading screw causes and the displacement of the contact site of leading screw groove make the power that invests stablize, improve the feeding of adapter, prevent that the record reproducing quality is low, the energy zero access, and can the implement device miniaturization.
The invention provides a kind of pick-up feeder, be provided with:
Leading screw;
Drive the rotating drive unit of this leading screw;
Tooth-strip part comprises the tooth portion with the engagement of the groove of above-mentioned leading screw;
Tabular connecting portion has pliability, makes described tooth-strip part be connected with adapter, supports above-mentioned tooth-strip part, and the energy edge pushes the direction of leading screw or leaves the direction elastic deformation of leading screw, and makes tooth-strip part push leading screw in its installation site; It is characterized in that:
The tangent line of the above-mentioned leading screw of the contact site of above-mentioned tooth portion and leading screw is arranged in the extended surface of above-mentioned tabular connecting portion, and the tangential direction of above-mentioned tooth portion and the above-mentioned leading screw of the contact site of leading screw and the bearing of trend of above-mentioned tabular connecting portion are consistent.
According to first aspect present invention, a kind of pick-up feeder is provided, be provided with: leading screw; Drive the rotating drive unit of this leading screw; Tooth-strip part comprises the tooth portion with the engagement of the groove of above-mentioned leading screw; Tabular connecting portion has pliability, makes described tooth-strip part be connected with adapter, supports above-mentioned tooth-strip part; The tangent line of the above-mentioned leading screw of the contact site of wherein above-mentioned tooth portion and leading screw is arranged in the extended surface of above-mentioned tabular connecting portion.
The invention provides a kind of information regenerator, be provided with: adapter, use the laser radiation carrier, detect reflected light from this carrier; Pick-up feeder moves above-mentioned adapter; Regenerating unit, the reflected light according to above-mentioned adapter detects makes the information regeneration from carrier; Wherein above-mentioned pick-up feeder is the pick-up feeder according to first aspect present invention.
The invention provides a kind of information record carrier, be provided with: adapter, use the laser radiation carrier, record the information on this carrier; Pick-up feeder moves above-mentioned adapter; Modulating device according to the signal of the described information that will write down, is modulated the laser that is radiated on the carrier; Wherein above-mentioned pick-up feeder is the pick-up feeder according to first aspect present invention.
To achieve these goals, in first invention of the present invention, the present invention proposes a kind of pick-up feeder, is provided with:
Leading screw;
Drive the rotating drive unit of this leading screw;
Tooth-strip part comprises the tooth portion with the engagement of the groove of above-mentioned leading screw;
Tabular connecting portion has pliability, is connected with the fixed part that leads to adapter, and the above-mentioned tooth-strip part of cantilever support can make above-mentioned tooth-strip part along moving near breaking away from the leading screw direction;
The means of energizing push above-mentioned tooth-strip part towards above-mentioned leading screw; It is characterized in that:
Make from the end of the fixed part side of above-mentioned tabular connecting portion the distance of the contact site of above-mentioned tooth portion and leading screw be shorter than from the end of said fixing portion side to the distance of the end of above-mentioned tooth-strip part side.
Pass through said structure, when the friction force because of the revolution tangential direction of leading screw makes that tabular connecting portion effect has moment of flexure, keep on one side contacting of tooth portion and leading screw, tooth-strip part run-off the straight on one side, the displacement of the contact site of tooth portion and leading screw is diminished, therefore, can prevent that the tooth portion of tooth-strip part from crossing the groove of leading screw.
Second invention of the present invention is in first invention of the invention described above, further have following feature: from above-mentioned lead screw shaft to, be to roughly 1/2nd of the distance of the end of above-mentioned tooth-strip part side from the end of said fixing portion side from the end of said fixing portion side to the distance of above-mentioned contact site.
Pass through said structure, when the friction force because of the revolution tangential direction of leading screw makes that tabular connecting portion effect has moment of flexure, can eliminate the displacement of the contact site of tooth portion and leading screw, therefore, the pick-up feeder that is provided can prevent that the tooth portion of tooth-strip part from crossing the groove of leading screw, reduces the power that invests, and reduces the load that produces because of friction, prevent that the recording/reproducing quality is low, can zero access.And can realize miniaturization.
The 3rd invention of the present invention is in first of the invention described above or second invention, further has following feature: with above-mentioned tabular connecting portion be arranged on above-mentioned tooth-strip part along the axial both sides of above-mentioned leading screw.
By said structure, tooth-strip part relative fixed portion is difficult in the distortion of lead screw shaft direction, for the revolution driving of leading screw, has increased the tracing ability of adapter, can realize stable pick-up feeder action.
The 4th invention of the present invention is that further have following feature: constitute above-mentioned tabular connecting portion with above-mentioned metallic leaf spring, double as is the above-mentioned means of energizing in each invention of first to the 3rd of the invention described above.
By said structure, owing to constitute tabular connecting portion with the metallic leaf spring, double as is the means of energizing, and therefore, does not need spring newly is set, and cost is low, and can realize miniaturization.
To achieve these goals, in the 5th invention of the present invention, the present invention proposes a kind of pick-up feeder, is provided with:
Leading screw;
Drive the rotating drive unit of this leading screw;
Tooth-strip part comprises the tooth portion with the engagement of the groove of above-mentioned leading screw;
Tabular connecting portion has pliability, is connected with the fixed part that leads to adapter, and the above-mentioned tooth-strip part of cantilever support can make above-mentioned tooth-strip part along moving near breaking away from the leading screw direction;
The means of energizing push above-mentioned tooth-strip part towards above-mentioned leading screw; It is characterized in that:
The tangent line of above-mentioned tooth portion and the above-mentioned leading screw of the contact site of leading screw and the extended surface of above-mentioned tabular connecting portion are roughly consistent.
By said structure, the friction force of the revolution tangential direction of leading screw can be to tabular connecting portion effect moment of flexure.
The 6th invention of the present invention is in the 5th invention of the invention described above, further has following feature: constitute above-mentioned tabular connecting portion with above-mentioned metallic leaf spring, double as is the above-mentioned means of energizing.
By said structure, owing to constitute tabular connecting portion with the metallic leaf spring, double as is the means of energizing, and therefore, does not need spring newly is set, and cost is low, and can realize miniaturization.
To achieve these goals, in the 7th invention of the present invention, the present invention proposes a kind of information regenerator, is provided with:
Adapter is used the laser radiation carrier, detects the reflected light from this carrier;
Pick-up feeder moves above-mentioned adapter;
Regenerating unit, the reflected light according to above-mentioned adapter detects makes the information regeneration from carrier; It is characterized in that:
Above-mentioned pick-up feeder is that the invention described above first is to the pick-up feeder described in each invention of the 6th.
By said structure, can realize the information regenerator of regeneration quality height and energy zero access.
To achieve these goals, in the 8th invention of the present invention, the present invention proposes a kind of information record carrier, is provided with:
Adapter is used the laser radiation carrier, records the information on this carrier;
Pick-up feeder moves above-mentioned adapter;
Modulating device according to information signal, is modulated the laser that is radiated on the carrier; It is characterized in that:
Above-mentioned pick-up feeder is that the invention described above first is to the pick-up feeder described in each invention of the 6th.
By said structure, can realize the information record carrier of recording quality height and energy zero access.
The following describes effect of the present invention.
As mentioned above, according to structure of the present invention, when the friction force because of the revolution tangential direction of leading screw makes that tabular connecting portion effect has moment of flexure, the displacement of the contact site of tooth portion and leading screw is diminished, and therefore, the pick-up feeder that is provided can prevent that the tooth portion of tooth-strip part from crossing the groove of leading screw, reduce the power that invests, minimizing prevents that because of the load that friction produces the recording/reproducing quality is low, can zero access.And can realize miniaturization.
According to structure of the present invention, the friction force of the revolution tangential direction of leading screw can be to tabular connecting portion effect moment of flexure, therefore, the pick-up feeder that is provided can prevent that the tooth portion of tooth-strip part from crossing the groove of leading screw, reduce the power that invests, minimizing prevents that because of the load that friction produces the recording/reproducing quality is low, can zero access.And can realize miniaturization.
Description of drawings
Fig. 1 is the apparatus structure oblique view of first embodiment of the invention.
Fig. 2 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 1 and the connecting portion.
Fig. 3 is the figure of modal representation Fig. 2.
Fig. 4 is the apparatus structure oblique view of second embodiment of the invention.
Fig. 5 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 4 and the connecting portion.
Fig. 6 is the apparatus structure oblique view of third embodiment of the invention.
Fig. 7 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 6 and the connecting portion.
Fig. 8 is the apparatus structure oblique view of fourth embodiment of the invention.
Fig. 9 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 8 and the connecting portion.
Figure 10 is used to illustrate that the optical disc apparatus summary of the embodiment of information regenerator of the present invention or information record carrier constitutes block scheme.
Figure 11 is the pick-up feeder structure oblique view of prior art.
Figure 12 A and Figure 12 B are near the figure of the lead screw shaft mate between the leading screw of seeing Figure 11 and the connecting portion.
Embodiment
Below, with reference to accompanying drawing, describe embodiments of the invention in detail.
Fig. 1 is the apparatus structure oblique view of first embodiment of the invention, among the figure, the various adapters that are used to make the optical element of rayed CD are carried in symbol 1 expression, first axis of guide that 2 expressions are led along the CD radial direction to adapter 1, above-mentioned relatively first axis of guide, 2 configured in parallel of 3 expressions, second axis of guide that adapter 1 is led along the CD radial direction, 4 expression motors, 5 expressions are provided with the spiral fashion slot part by the leading screw that cylindrical shaft constitutes on this cylindrical shaft.Above-mentioned leading screw 5 is connected with motor 4, is driven revolution.At this moment, make that the central shaft of above-mentioned leading screw 5 is consistent with the revolving shaft of motor 4 and connecting.
Below, for convenience of explanation, shown in arrow among the figure, the central axis direction of above-mentioned first axis of guide 2 is called directions X, to meet at right angles with above-mentioned directions X and side-looking adapter 1 direction is called the Y direction, will meet at right angles with above-mentioned X, Y direction and overlook adapter 1 direction to be called the Z direction.
6 expressions are fixed on the adapter 1, be used for the revolution of above-mentioned leading screw 5 is passed to the tooth bar body of adapter 1.This tooth bar body 6 is made of fixed part 7, tooth-strip part 9 and connecting portion 8, and said fixing portion 7 is fixed on the adapter 1, and above-mentioned tooth-strip part 9 is provided with the tooth portion 10 with the engagement of leading screw 5 slot parts, and above-mentioned connecting portion 8 is connected and fixed portion 7 and tooth-strip part 9, is leaf-spring-like.Tooth bar body 6 is made of resin, by integrally formed formation fixed part 7, tooth-strip part 9 and connecting portion 8.Connecting portion 8 forms thinner wall section.
The extensions that fixed part 7 forms L fonts part and extends along adapter 1 bottom surface from the both sides, bight of this L font part, above-mentioned L font partly comprise the face that a bottom surface and the side with adapter 1 joins; One end of connecting portion 8 is connected with the leading section of the extension of fixed part 7, and the tooth-strip part 9 that is provided with tooth portion 10 is connected with the other end of connecting portion 8.In addition, fixed part 7 is fixed by the relative adapter 1 of screw, tooth bar body 6 is fixed on the adapter 1.
When the Y direction was seen, tooth-strip part 9 constituted by roughly being T font plate-shaped member, formed tooth portion 10 at the central portion of tooth-strip part 9, and both ends are by connecting portion 8,8 supportings.
The length direction of connecting portion 8 towards with the Z direction of leading screw 5 axial orthogonals, can or leave direction (Y direction) elastic deformation of leading screw 5 along the direction of pushing leading screw 5.
In addition, tooth portion in the tooth-strip part 9 10 forms the back side and the mutual subtend of wall of fixed part 7 of faces, and configuration compression helical spring 11 between the above-mentioned back side and wall makes tooth-strip part 9 and above-mentioned leading screw 5 crimping.
On adapter 1 body that CD is write down or reset, be formed for inserting the 1a of hole portion of above-mentioned first axis of guide 2, sidepiece at adapter 1 body forms the U font slot part 1b that cooperates with above-mentioned second axis of guide 3, adapter 1 body is being supported by above-mentioned two axis of guides 2,3, can move along the CD radial direction.
Leading screw 5 and above-mentioned two axis of guides, 2,3 configured in parallel drive revolution by motor 4, and the two ends of above-mentioned two axis of guides 2,3 and motor 4 are fixed on not to be had on the illustrated base, and leading screw 5 one ends and motor 4 revolving shaftes join, and the other end is supported by bearing, can turn round freely.
And, tooth portion 10 and the spiral groove engagement of being located on the above-mentioned leading screw 5, by leading screw 5 revolutions, adapter 1 moves along the CD radial direction, carry out record or the small of playback time and send action to, and the high speed during access is sent action to.
Fig. 2 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 1 and the connecting portion, and the projection on the subtend face of tooth-strip part 9 and fixed part 7 is located in 12 expressions, is used for compression helical spring 11 is positioned, and prevents that it from coming off.As shown in Figure 2, when directions X was seen, tooth bar body 6 roughly was the F font.
Connecting portion 8 extends from fixed part 7 along short transverse, crosses leading screw 5 and joins with tooth-strip part 9.Promptly, compare to the distance 1 of tooth-strip part 9 side ends with end from fixed part 7 sides at the bearing of trend (Z direction) of connecting portion 8, short with the distance 1 ' of leading screw 5 contact sites from the end of fixed part 7 sides to tooth portion 10.
Fig. 3 is the figure of modal representation Fig. 2.In Fig. 2, when being clockwise direction as the gyratory directions of above-mentioned leading screw 5, in tooth portion 10 direction friction force takes place, connecting portion 8 is applied moment M shown in Fig. 3 direction of arrow.At this moment, tooth-strip part 9 side ends of connecting portion 8 are out of shape towards breaking away from leading screw 5 directions, but simultaneously in the tooth-strip part 9 side end run-off the straights of connecting portion 8, tooth-strip part 9 is towards the direction swing that makes tooth portion 10 near leading screw 5.As a result, tooth-strip part 9 side ends of connecting portion 8 have been offset towards the distortion that breaks away from leading screw 5 directions.
If represent the caused displacement of semi-girder moment of flexure, shown in (1) with formula:
v＝M*L^2/(2*E*I) (1)
In the formula, v: the displacement on top
M: moment of flexure
L: the length of semi-girder
E: young's modulus
I: cross section inertia geometric moment
The gradient i on top represents with following formula (2):
i＝M*L/(E*I) (2)
, on the straight line that the root direction is extended with gradient i, represent with following formula (3) for the displacement at x place from the top from the top distance:
v-i*x＝M*L^2/(2*E*I)-M*L/(E*I)*x (3)
It becomes zero condition following formula (4) expression:
x＝L/2 (4)
Promptly, is from the end of fixed part 7 sides of connecting portion 8 during to 1/2nd (1 '=1/2) of the distance of the end of tooth-strip part 9 sides to the contact site of the tooth portion 10 of tooth-strip part 9 and leading screw 5 in the distance of Z direction from the end of fixed part 7 sides of connecting portion 8, the displacement of the caused connecting portion 8 of moment M is just in time offset near the amount of leading screw 5 with the tooth portion 10 of tilting to cause because of tooth-strip part 9 becomes zero, can eliminate the influence because of the caused moment of flexure of friction force of the revolution tangential direction of leading screw 5.
Equally, when the gyratory directions of above-mentioned leading screw 5 among Fig. 2 is counter clockwise direction, direction friction force under tooth portion 10 takes place, tooth-strip part 9 side ends of connecting portion 8 are towards being out of shape near leading screw 5 directions, but in the tooth-strip part 9 side end run-off the straights of connecting portion 8, tooth-strip part 9 is towards making tooth portion 10 break away from the direction swing of leading screw 5 simultaneously.As a result, offset of the distortion of tooth-strip part 9 side ends of connecting portion 8, prevented the increase of the power that invests of tooth-strip part 9 pushing leading screws 5 near leading screw 5 directions.
Like this, make from the end of fixed part 7 sides shorter to the distance 1 of tooth-strip part 9 side ends with the distance 1 ' of leading screw 5 contact sites than end from fixed part 7 sides to tooth portion 10, even because the gyratory directions of leading screw 5, causing that masterpiece is used in makes tooth-strip part 9 break away from the direction of leading screws 5, also can tilt by tooth bar body 6, reduction from the power that invests force opposite direction of compression helical spring 11, therefore, can keep the pushing force of tooth-strip part 9 to leading screw 5.As a result, tooth portion 10 is difficult to cross the groove of leading screw 5, and the pushing force that does not need to strengthen compression helical spring 11 can drive leading screw 5 revolutions with light load to more than necessity.
In addition, even because the gyratory directions of leading screw 5, cause that masterpiece is used in to make the direction of tooth-strip part 9 near leading screw 5, also can tilt by tooth bar body 6, reduce the power that invests of compression helical spring 11 and the power that tooth bar body 6 is increased the weight of, therefore, can keep the pushing force of tooth-strip part 9 to leading screw 5.As a result, the frictional resistance between tooth portion 10 and leading screw 5 slot parts in the contact site diminishes, and can successfully make adapter 1 realize small feeding at record or in resetting.
When directions X was seen, tooth-strip part 9 and connecting portion 8 be in Z direction overlay configuration, therefore, and can miniaturization in the Z direction.Have, there is no need to arrange in the axial order of leading screw 5 length direction and the tooth-strip part 9 of connecting portion 8, therefore, leading screw 5 self length also can shorten, and can make equipment miniaturization at directions X.
In addition, axial along leading screw 5, connecting portion 8 is configured in the both sides of tooth-strip part 9, therefore, tooth-strip part 9 relative fixed portions 7 are difficult in leading screw 5 axial deformations, drive for the revolution of leading screw 5, have increased the tracing ability of adapter 1, can realize that stable pick-up feeder moves.
Fig. 4 is the apparatus structure oblique view of second embodiment of the invention, among the figure, the various adapters that are used to make the optical element of rayed CD are carried in symbol 15 expression, the axis of guide that 16 expressions are led along the CD radial direction to adapter 15,17 expression motors, 18 expressions are provided with the spiral fashion slot part by the leading screw that cylindrical shaft constitutes on this cylindrical shaft.Above-mentioned leading screw 18 is connected with motor 17, is driven revolution.At this moment, make that the central shaft of above-mentioned leading screw 18 is consistent with the revolving shaft of motor 17 and connecting.
20 expression tooth bar bodies, sheet metals such as 21 expression phosphor bronzes, 22 expressions are provided with the resinous tooth-strip part of tooth portion 23, above-mentioned tooth portion 23 and the engagement of leading screw 18 slot parts.Tooth-strip part 22 is same shape with tooth-strip part 9 shown in Figure 1, constitutes with the plate-shaped member that roughly is the T font, in the central portion formation tooth portion 23 of tooth-strip part 22.Sheet metal 21 is made of fixed part 24 and connecting portion 25, said fixing portion 24 is depending on the occasions along the Z direction, is U word shape, by screw retention on adapter 15 bodies, above-mentioned connecting portion 25 is to extend the both ends of supporting above-mentioned tooth-strip part 22 from said fixing portion 24 both sides.Constitute tooth bar body 20 on the sheet metal 21 by tooth-strip part 22 outer embeddings are formed in, this tooth bar body 20 is fixed on the adapter 15.
Sidepiece at adapter 15 bodies forms the 15b of bearing portion that is provided with the 15a of hole portion, and leading screw 18 inserts among the 15a of this hole portion.In addition, form U word shape slot part 15c in the other side of adapter 15 bodies, this U word shape slot part 15c cooperates with the axis of guide 16, and adapter 15 bodies are by the axis of guide 16 and leading screw 18 supportings, be subjected to the guiding of the above-mentioned axis of guide 16 and leading screw 18, can move along the CD radial direction.
When being fixed to tooth bar body 20 on the adapter 15, for tooth portion 23 being configured in the U font inside of sheet metal 21, make the end of from connecting portion 25 fixed part 24 sides be shorter than from the end of fixed part 24 sides to the distance of tooth-strip part 22 side ends to the distance of tooth portion 23 and leading screw 18 contact sites.
Fig. 5 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 4 and the connecting portion.Set the height of the installation site of fixed part 24 in the adapter 15, make connecting portion 25 deflection slightly, to make tooth-strip part 22 push leading screws 18 by the flexible restoring force of the leaf spring of connecting portion 25.
By this structure, because the end of fixed part 24 sides is shorter than from the end of fixed part 24 sides to the distance of tooth-strip part 22 side ends to the distance of tooth portion 23 and leading screw 18 contact sites from connecting portion 25, same with above-mentioned first embodiment, even because the gyratory directions of leading screw 18, causing that masterpiece is used in makes tooth-strip part 22 break away from the direction of leading screws 18, tooth portion 23 also is difficult to cross the groove of leading screw 18, the caused pushing force of leaf spring elasticity that does not need to strengthen connecting portion 25 can drive leading screw 18 revolutions with light load to more than necessity.In addition, even because the gyratory directions of leading screw 18, causing that masterpiece is used in makes tooth-strip part 22 near the direction of leading screw 18, can make that also the frictional resistance in the contact site diminishes between tooth portion 23 and leading screw 18 slot parts, can successfully make adapter 15 realize small feeding at record or in resetting.
In addition, there is no need to be provided with compression helical spring as the means that tooth-strip part 22 invested power, therefore, can not increase the height of Z direction, tooth-strip part 22 can be configured in the above-below direction of leading screw 18,, leading screw 18 can be also used as an axis of guide owing to do not need the space of compression helical spring.And make from the end of fixed part 24 sides of connecting portion 25 that the distance at connecting portion 25 bearing of trends of tooth portion 23 and the contact site of leading screw 18 is to 1/2nd of the distance of the end of tooth-strip part 22 sides from the end of fixed part 24 sides of connecting portion 25, same with above-mentioned first embodiment, can eliminate influence because of the caused moment of flexure of friction force of the revolution tangential direction of leading screw 18.
Fig. 6 is the apparatus structure oblique view of third embodiment of the invention, and among the figure, symbol 30 expressions are fixed on the tooth bar body that passes to adapter 1 on the adapter 1, with the revolution of leading screw 5.The parts identical with first embodiment shown in Figure 1 are marked with prosign, describe in detail to omit.
This tooth bar body 30 is by being fixed on fixed part 31 on the adapter 1, being provided with the tooth-strip part 32 of the tooth portion 33 of leading screw 5 slot parts engagement, being connected said fixing portion 31 and tooth-strip part 32 and constituting at the tabular connecting portion 34 of Y direction elastically deformable.Above-mentioned tooth bar body 30 is a resin system, by integrally formed formation fixed part 31, connecting portion 34, tooth-strip part 32.Wherein, connecting portion 34 forms thinner wall section.
Said fixing portion 31 forms T font part and extension, above-mentioned T font partly is provided with the face that a bottom surface and a side with adapter 1 join, and does not extend along adapter 1 bottom surface with the both sides, end of adapter one side joining part from this T font part above-mentioned extension.Connecting portion 34 1 ends are connected with the leading section of the extension of said fixing portion 31, and connecting portion 34 the other end are connected with the tooth-strip part 32 that is provided with tooth portion 33.
When tooth-strip part 32 is seen from the Y direction, the plate-shaped member that is rectangle, in the central portion formation tooth portion 33 of tooth-strip part 32, the both ends of rectangle below are by connecting portion 34,34 supportings.
The length direction of connecting portion 34 towards with the Z direction of leading screw 5 axial orthogonals, can or leave the direction elastic deformation of leading screw 5 along the direction of pushing leading screw 5.
In addition, tooth portion in the tooth-strip part 32 33 forms the back side and the mutual subtend of wall of fixed part 31 of faces, and configuration compression helical spring 11 between the above-mentioned back side and wall makes tooth-strip part 32 and above-mentioned leading screw 5 crimping.
Fig. 7 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 6 and the connecting portion, the bearing of trend of connecting portion 34 is consistent with the tangential direction of the contact site of tooth portion 33 and leading screw 5, comprises the tangent line of the contact site of above-mentioned tooth portion 33 and leading screw 5 in the plane that comprises connecting portion 34.That is, on the extended line of connecting portion 34, there is tooth portion 33.Therefore, though because of the revolution of leading screw 5 in tangential direction generation friction force, can not prevent to make tooth-strip part 32 break away from the power of leading screws 5 directions, and cause tooth portion 33 easily to cross the groove of leading screw 5 connecting portion 34 effect moments of flexure because of leading screw 5 revolutions produce yet.As a result, there is no need the pushing force that spring produced with energizing and be strengthened to more than necessity, can drive leading screw 5 revolutions with light load.
Fig. 8 is the apparatus structure oblique view of fourth embodiment of the invention, among the figure, and symbol 40 expression tooth bar bodies, 41 expressions are provided with the tooth-strip part of the tooth portion 42 of meshing with leading screw 18 slot parts.The parts identical with second embodiment shown in Figure 4 are marked with prosign, describe in detail to omit.
In the tooth bar body 20 of second embodiment shown in Figure 4, tooth portion 23 is configured in the U font inside of sheet metal 21, and in the tooth bar body 40 of the 4th embodiment shown in Figure 8, is shaped by outer embedding, makes tooth portion 42 be configured in the U font outside of sheet metal 21.
Fig. 9 is near the figure of the lead screw shaft mate between the leading screw of seeing Fig. 8 and the connecting portion.The same with second embodiment, set the installation site in adapter 15, make connecting portion 25 deflection slightly, to make tooth-strip part 41 push leading screws 18 by the flexible restoring force of the leaf spring of connecting portion 25.In addition, tooth portion 42 is present on the extended line of connecting portion 25.
By this structure, there is no need to be provided with compression helical spring as the means that tooth-strip part 41 is energized, therefore, can not increase height, tooth-strip part 41 can be configured in the above-below direction of leading screw,, leading screw 18 can be also used as an axis of guide owing to do not need to be used to be provided with the space of compression helical spring.And because the length direction of connecting portion 25 is consistent with the tangential direction of the contact site of tooth portion 42 and leading screw 18, therefore, the same with the 3rd embodiment, even because of the revolution of leading screw 18 in tangential direction generation friction force, can can not prevent to cause tooth portion 42 easily to cross the groove of leading screw 18 connecting portion 25 effect moments of flexure because of leading screw 18 revolutions produce the power that makes tooth-strip part 41 break away from leading screw 18 directions yet.As a result, there is no need the pushing force that spring produced with energizing and be strengthened to more than necessity, can drive leading screw 18 revolutions with light load.
Figure 10 is used to illustrate that the optical disc apparatus summary of the embodiment of information regenerator of the present invention or information record carrier constitutes block scheme, among the figure, the optical pickup unit feed arrangement of symbol 50 for adapter 1 is moved radially along CD 51,52 for making CD 51 rotating table motors, 53 are the record compensating circuit, and 54 is the RF signal processing circuit, and 55 is modulation/demodulation circuit, 56 is CPU, and 57 is servo control circuit.
Modulation/demodulation circuit 55 and audio circuit, compression of images/elongation circuit or the interface that is used for being connected with computing machine continue mutually, according to utilizing purpose, input/output signal.Comprise according to being recorded in circuit that the tracer signal in the CD 51 modulates laser etc. at record compensating circuit 53.
RF signal processing circuit 54 comprise according to from the reflected light of CD 51 to the circuit etc. that signal waveform is carried out shaping that reads from adapter 1 output.Servo control circuit 57 carries out servocontrol, from reading the error composition of input tracking error signal or focus error signal etc., to adapter 1 and CD motor 52 feedbacks, to eliminate the error composition.This servocontrol has focus servo, tracking servo, and adapter drives servo.In addition, use pick-up feeder as the feed screw mode of Fig. 1～shown in Figure 9 as optical pickup unit feed arrangement 50.
Usually, in the pick-up feeder servo control mechanism, use tracking error signal.And, if tracking error signal becomes more than the certain value, then make electric current flow through CD-ROM drive motor 4 (with reference to Fig. 6), make CD-ROM drive motor 4 revolutions.By CD-ROM drive motor 4 revolutions, adapter 1 integral body moves radially along CD 51.If tracking error signal is less than certain value, then electric current does not flow to CD-ROM drive motor 4, stops CD-ROM drive motor 4 revolutions.When access, do not use the pick-up feeder servo loop, flow through the electric current of deciding of plus or minus in CD-ROM drive motor 4, make adapter 1 from inside week of CD 51 peripheries or reverse direction high-speed mobile.By the zero cross point of during this period tracking error signal etc. is counted, at the line access that advances near mobile destination.If arrive near the mobile destination, make the pick-up feeder servo action, replay signal is carried out computing to departing from of relative target location, once more by the counting track number, carries out feeding or returns or magnetic track jumps over, and carries out access to the target location.Make the target location of laser radiation CD 51 from adapter 1, information is write CD 51, or detect the reflected light from CD 51 target locations, the information of playback CD 51.
Optical disc apparatus shown in Figure 10 is the drive unit of record regenerating type, but also can be the regeneration type drive unit that omits record compensating circuit 53.
By above-mentioned formation, can realize the optical disc apparatus of recording/reproducing quality height and energy zero access.
Claims (3)
1. pick-up feeder is provided with:
Leading screw;
Drive the rotating drive unit of this leading screw;
Tooth-strip part comprises the tooth portion with the engagement of the groove of above-mentioned leading screw;
Tabular connecting portion has pliability, makes described tooth-strip part be connected with adapter, supports above-mentioned tooth-strip part, and the energy edge pushes the direction of leading screw or leaves the direction elastic deformation of leading screw, and makes tooth-strip part push leading screw in its installation site; It is characterized in that:
The tangent line of the above-mentioned leading screw of the contact site of above-mentioned tooth portion and leading screw is arranged in the extended surface of above-mentioned tabular connecting portion, and the tangential direction of above-mentioned tooth portion and the above-mentioned leading screw of the contact site of leading screw and the bearing of trend of above-mentioned tabular connecting portion are consistent.
2. information regenerator is provided with:
Adapter is used the laser radiation carrier, detects the reflected light from this carrier;
Pick-up feeder moves above-mentioned adapter;
Regenerating unit, the reflected light according to above-mentioned adapter detects makes the information regeneration from carrier; It is characterized in that:
Above-mentioned pick-up feeder is aforesaid right requirement 1 a described pick-up feeder.
3. information record carrier is provided with:
Adapter is used the laser radiation carrier, records the information on this carrier;
Pick-up feeder moves above-mentioned adapter;
Modulating device according to the signal of the described information that will write down, is modulated the laser that is radiated on the carrier; It is characterized in that:
Above-mentioned pick-up feeder is aforesaid right requirement 1 a described pick-up feeder.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP343132/01 | 2001-11-08 | ||
| JP2001343132 | 2001-11-08 | ||
| JP138611/02 | 2002-05-14 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021503486A Division CN1236429C (en) | 2001-11-08 | 2002-11-05 | Pick-up feeder, information regenerator and information recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1801351A CN1801351A (en) | 2006-07-12 |
| CN100485793C true CN100485793C (en) | 2009-05-06 |
Family
ID=36811283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101246245A Expired - Fee Related CN100485793C (en) | 2001-11-08 | 2002-11-05 | Pick-up feeder, information regenerator and information recorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100485793C (en) |
-
2002
- 2002-11-05 CN CNB2005101246245A patent/CN100485793C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1801351A (en) | 2006-07-12 |
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