CN2626008Y

CN2626008Y - Optical disk drive having positioning guide bar and fixing structure for preventing distortion of the same

Info

Publication number: CN2626008Y
Application number: CN 03257407
Authority: CN
Inventors: 张智为
Original assignee: Msi Technology Co ltd
Current assignee: Msi Technology Co ltd
Priority date: 2003-05-09
Filing date: 2003-05-09
Publication date: 2004-07-14
Anticipated expiration: 2013-05-09

Abstract

A disc driver which is provided with a positioning guide rod and a fixed structure which can prevent the deformation of the positioning guide rod comprises a machine core board body, a guide rod, a fixed structure which positions the guide rod on the machine core board body and an optical pickup head which is guided by the guide rod and is moved along the extension direction of the length of the guide rod, the fixed structure includes a fixed connection device and a flexible press connection device, the fixed connection device rigidly fixes one end of the guide rod on the machine core board body, and the flexible press connection device presses and positions the other end of the guide rod on the machine core board body flexibly. The utility model provides the disc driver with the positioning guide rod and the fixed structure that can prevent the deformation of the positioning guide rod during the positioning at the same time, so as to ensure the coaxial linearity of the movement of the optical pickup head of the disc driver and facilitate the adjustment of the tilt angle and direction of a main axis motor and the rotation plane of a disc, which can improve the accuracy and stability of the information reading and writing.

Description

Have location guide and prevent the CD drive of the fixed sturcture of its distortion

[technical field]

The utility model relates to a kind of CD drive, particularly relates to a kind of CD drive that has location guide and prevent the fixed sturcture of its distortion.

[background technology]

With reference to figure 1, be the big cage structure of a CD drive, it includes a body 91, a loam cake 92 and a lower cover 93, makes body 91 to be coated by loam cake 92 and lower cover 93.In addition, body 91 inside are provided with a pallet 94 that can be stretched out by the front end of body 91 and bounce back (state when being retraction on the figure) outwardly, in order to bearing one discs (figure does not show), and more be provided with a movement plate body 95 in the body 91, include one on the movement plate body 95 and drive the Spindle Motor 96 that discs is rotated, and one on discs the optical read head 97 of reading/writing document, wherein, optical read head 97 is to guide by a guide rod 98 that is positioned on the movement plate body 95, make optical read head 97 generally move around, and with optical mode discs is carried out the read-write of data by 97 emitted laser bundles of optical read head with the radial direction of discs.Because this structure and principle partly is roughly similar to existing CD drive, does simple explanation at this.

And for performance of optical disk drives, the correctness of reading/writing document is the factor of overriding concern.Therefore, whether 97 emitted laser bundles of optical read head are beaten on the discs surface with correct angle then is the key factor of reading/writing document correctness, so the manufacturer of each tame production CD drive all can proofread and correct the optical read head 97 and the relative position of discs Plane of rotation earlier before the CD drive product export, the laser beam that optical read head 97 is produced is able to the read-write operation that correct angle is carried out data.

So on the method for proofreading and correct, often the mode of using is that optical read head 97 movement locus are kept in a straight line, achieved the above object and the Plane of rotation position of discs adjusts, therefore, the CD drive of utilizing this kind mode to proofread and correct, its guide rod 98 generally is to be completely fixed on the movement plate body 95, make the movement locus that is subjected to guide rod 98 to wear the optical read head 97 of guiding can keep identical with guide rod 98 bearing of trends, then be provided with adjusting mechanism (figure does not show) at Spindle Motor 96 and 95 of movement plate bodys, in order to fine setting Spindle Motor 96 relative angles of inclination on plane, movement plate body 95 place, and because Spindle Motor 96 is in order to drive the discs rotation, so the minor alteration at Spindle Motor 96 angles of inclination is with the position of recoverable discs Plane of rotation with respect to optical read head 97.

But as Fig. 2 (for ease of explanation, this figure draws movement plate body 95 among Fig. 1 and associated component with upset kenel upwards), the first end 981 and the second end 982 of conventional optical disc drive guide rod 98 are to be fixed on the movement plate body 95 with one first firm joint device 991 and one second firm joint device 992 respectively.First firm joint device 991 has the butting section 9911 of giving prominence on movement plate body 95 surfaces, and one is locked in packing bolt 9912 on the movement plate body 95 with screw fashion.992 of second firm joint devices have the position is recess on a pedestal 961 surfaces of fixed main shaft motor 96 a draw-in groove 9921, and one utilizes the retaining piece 9922 of screw closure on pedestal 961.

Simultaneously with reference to figure 2, Fig. 3 and Fig. 4, during assembling, the first end 981 that makes guide rod 98 near movement plate bodys 95 surfaces and position in the butting section 9911 with packing bolt 9912 in the middle of, and packing bolt 9912 constitutes the bigger head end of a diameter, the lower periphery place of head end forms a tapered slope 9913, when packing bolt 9912 is healed when movement plate body 95 is locked, tapered slope 9913 can more contact first end 981 surfaces of guide rod 98 and first end 981 is progressively applied a compressing strength, this compressing strength will be pushed first end 981 and closely be contacted to movement plate body 95 and butting section 9911 simultaneously, make first end 981 tightly be positioned at butting section 9911, in the middle of packing bolt 9912 and movement plate body 95 threes, constitute the irremovable structure that rigidly fixes fully.

Fig. 2 and shown in Figure 5 for another example, 982 of the second ends of guide rod 98 are that engaging enters in the draw-in groove 9921, by retaining piece 9922 across above the draw-in groove 9921 with the compressing the second end 982 in draw-in groove 9921, making the motion of the second end 982 left and right directions be subjected to draw-in groove 9921 limits, and the motion of downward direction is stopped by movement plate body 95, again, to motion then is subjected to the compacting of retaining piece 9922 upward, so also constitutes the irremovable structure that rigidly fixes fully.

Hence one can see that, the first end 981 of tradition guide rod 98 all is with the tightening position with the second end 982, the mode of rigidly fixing of no degree of freedom is positioned on the movement plate body 95, though can guarantee the steadiness of guide rod 98 on the location, yet on the practice of making and assembling, and can't guarantee the plane precision of movement plate body 95, so when utilizing the fixed form of above-mentioned rigidity to be fixed on guide rod 98 on the movement plate body 95, in case movement plate body 95 is not that the position is when same plane for guide rod 98 first ends 981 and the second end 982 position contacting, first end 981 is carried on as before with the second end 982 and is so oppressed rigidly on movement plate body 95, therefore will cause the first end 981 of guide rod 98 and the second end 982 has relative position along with the surface of movement plate body 95 injustice change, and cause guide rod 98 to have diastrophic situation to take place.Moreover, because sealed packing bolt 9912 or retaining piece 9922 are on movement plate body 95 time, normally adopt as automated tools such as electric screw drivers, to screw torsion all quite big and these automated tools produced, also make the first end 981 of guide rod 98 be forced to and the strength of tightening is relative strengthens, make guide rod 98 bending situations even more serious with the second end 982.Thus, to cause guide rod 98 to lose existing axial rectilinearity, and the movement locus of the optical read head 97 of being guided by guide rod 98 naturally can be not in a straight line, so even Spindle Motor 96 has the fine setting design at angle of inclination with respect to movement plate body 95, can't guarantee that also the thunder laser beam that optical read head 97 is launched all can beat on the discs surface with correct angle on any one position, have a strong impact on the correctness and stability of data reading-writing between optical read head 97 and discs.

And by on the other hand, in case guide rod 98 flexural deformations, produce the phenomenon that degree of tightness differs in the time of will causing optical read head 97 on guide rod 98, to move around, be optical read head 97 the time through the bigger position of guide rod 98 diastrophic curvature, the motor that drives the gear train of optical read head 97 motions need provide bigger moment that optical read head 97 is passed through, the servo-control system that causes CD drive is than difficult moving of optical read head 97, the therefore complicated processes in increase assembling degree of difficulty and the adjustment controlled.

[utility model content]

The purpose of this utility model is to provide a kind of CD drive that has location guide and prevent the fixed sturcture of its distortion, make CD drive have location guide and prevent simultaneously that also guide rod from producing the fixed sturcture of distortion when the location, the axial rectilinearity that moves with the optical read head of guaranteeing CD drive, be convenient to adjust the Plane of rotation of an orientation, Spindle Motor angle of inclination and a discs, and then improve correctness and stability on the data reading-writing.

In order to achieve the above object, the utility model provides a kind of CD drive that has location guide and prevent the fixed sturcture of its distortion, comprise a movement plate body, a guide rod, a fixed sturcture, and an optical read head that follows the motion of this guide rod length bearing of trend, it is characterized in that:

This fixed sturcture comprises a firm joint device and an elasticity compression bonding apparatus, and this firm joint device is rigidly fixed to an end of this guide rod on this movement plate body, and this elasticity compression bonding apparatus is then flexibly suppressed the other end of this guide rod and is positioned on this movement plate body.

The described CD drive that has location guide and prevent the fixed sturcture of its distortion, it is characterized in that: this elasticity compression bonding apparatus comprises a stop section and an elastic body that is positioned on this movement plate body, and an end of this guide rod then is clamped in the middle of this stop section and this elastic body.

The described CD drive that has location guide and prevent the fixed sturcture of its distortion, it is characterized in that: this CD drive also includes a pedestal and that is fixed on this movement plate body and is positioned at Spindle Motor on this pedestal, this pedestal is provided with most roll-setting gears in different corresponding positions respectively with this Spindle Motor, this each roll-setting gear comprises that then two ends are connected to the spring between this pedestal and this Spindle Motor respectively, and a bolt that is spirally connected this pedestal and this Spindle Motor.

The described CD drive that has location guide and prevent the fixed sturcture of its distortion is characterized in that: the elastic body of this elasticity compression bonding apparatus is to be connected in this roll-setting gear spring wherein.

The described CD drive that has location guide and prevent the fixed sturcture of its distortion, it is characterized in that: this firm joint device has one and is positioned at butting section on this movement plate body and the screw lock forcing piece at this movement plate body, and an end of this guide rod tightly is positioned in the middle of this butting section and the forcing piece.

In sum, the utlity model has location guide and prevent the CD drive of the fixed sturcture of its distortion, be positioned on the movement plate body with firm joint device and elasticity compression bonding apparatus respectively by the guide rod two ends, make guide rod be the mode of rigidly fixing on one side, another side then is the flexible fastening mode, can therefore avoid the influence of movement plate body flatness, and automatically to the guide rod deflection in addition absorption compensation with keep guide rod shaft to straight line extend, and then can guarantee the rectilinearity of optical read head movement locus, in case can keeping it in assembling process, optically read cephalomotor rectilinearity stablizes, cooperate the adjustment at Spindle Motor angle of inclination again, the reliability that can quite easily make optical read head read data is greatly enhanced, and the accuracy requirement that does not have the complicated processes in the adjustment of conventional optical disc drive structure and assemble, so can reach the purpose of this utility model really.

[description of drawings]

Below by most preferred embodiment and accompanying drawing CD drive of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is a three-dimensional exploded view, is to look up the big cage structure that angle is represented a conventional optical disc drive with one;

Fig. 2 is the part structure decomposing schematic representation of Fig. 1 CD drive, and the package assembly of a movement plate body and a guide rod is described;

Fig. 3 is the three-dimensional enlarged diagram behind the part tectonic association of Fig. 2, and the assembling of the first end and the movement plate body of guide rod is described;

Fig. 4 is the IV-IV sectional view of Fig. 3, and the stress of the first end of guide rod is described;

Fig. 5 is the three-dimensional enlarged diagram behind the part tectonic association of Fig. 2, and the assembling of the second end and the movement plate body of guide rod is described;

Fig. 6 is a three-dimensional exploded view of the present utility model, and the assembling kenel of the main relative configurations of a preferred embodiment of the utility model CD drive is described;

Fig. 7 is a stereo amplification figure of the present utility model, illustrates that the first end of the guide rod of this preferred embodiment is fixed on the outward appearance of movement plate body;

Fig. 8 of the present utility model one amplifies three-dimensional exploded view, and the second end of guide rod of this preferred embodiment and the location aspect of movement plate body are described;

Fig. 9 is a stereo amplification figure of the present utility model, is to represent outward appearance after the second end of the guide rod of this preferred embodiment is positioned at the movement plate body with another angle;

Figure 10 is an X-X sectional view among Fig. 9, and the stress of the second end of guide rod of the present utility model is described.

[embodiment]

Consult Fig. 6, one preferred embodiment of CD drive of the present utility model consists predominantly of a movement plate body 1, a pedestal 2, a Spindle Motor 3, most roll-setting gear 4, a guide rod 5, a secondary guide 6, optical read head 7 that connects pedestal 2 and Spindle Motor 3, and one is positioned at fixed sturcture on the movement plate body 1 with guide rod 5.In addition, other member of CD drive is then generally similar to the conventional optical disc drive structure, and because of non-the utility model emphasis place, does not promptly describe in detail at this.

It is plane that movement plate body 1 generally is, and its centre forms a hollow part 10, and be provided with three screws 11 that run through movement plate body 1 at three diverse location places of a side of hollow part 10.

Pedestal 2 is tabular bodys of a small size, its face near movement plate body 1 be fitted on the movement plate body 1, other one direction that faces away from movement plate body 1 is provided with three positioning convex column 21, positioning convex column 21 centers respectively are provided with a through hole 22, and corresponding respectively screw 11 positions on movement plate body 1 of each through hole 22.

Spindle Motor 3 has a motor body 31, and driven and the disk clamping holder 32 of coaxial rotation by motor body 31 driving shafts (figure does not show), and a seat board 33 that is combined on the motor body 31, corresponding these through hole 22 positions respectively are provided with a through hole 34 on the seat board 33.

Most roll-setting gears 4, be to cooperate the number of positioning convex column 21, through hole 22 and through hole 34 and use three groups of roll-setting gears 4 in this example, each roll-setting gear 4 includes a spiral helicine spring 41 and a bolt 42, spring 41 can be set in respectively on the corresponding positioning convex column 21, make spring 41 two ends be connected to the seat board 33 of pedestal 2 and Spindle Motor 3 respectively, can make pedestal 2 and Spindle Motor 3 disconnected from each other and maintain spacing distance.In addition, 42 on bolt can pass corresponding Spindle Motor 3 through hole 34, pedestal 2 through hole 22 and be locked together in screw 11 on the movement plate body 1, make that pedestal 2 and Spindle Motor 3 are near each other and pedestal 2 is fixed on the movement plate body 1 together with Spindle Motor 3, the disk clamping holder 32 of Spindle Motor 3 then the position in the hollow part 10 of movement plate body 1 with on the other one side that is emerging in movement plate body 1, in order to drive a discs (figure do not show) rotation.

Guide rod 5 is for long linear and have the rhabodoid of circular section, and its length bearing of trend has an opposite first end 51 and a second end 52, and guide rod 5 is abutted against on the surface of movement plate body 1 and across the side at hollow part 10.

Secondary guide 6 is general identical with guide rod 5 kenels, secondary guide 6 and guide rod 5 be parallel and apart certain distance ground across opposite opposite side at the hollow part 10 of movement plate body 1.

Optical read head 7 is in order to produce the assembly of laser beam, and can be in the middle of the hollow part 10 of movement plate body 1 movable and on discs reading/writing document, optical read head 7 one sides be for guide rod 5 can wear relatively versatilely by, another opposite sides then is provided with an outwards outstanding fork-shaped portion 71, and fork-shaped portion 71 is bridged on secondary guide 6.And optical read head 7 is driven by other gear train (figure does not show), make the motion path of optical read head 7 mainly be subjected to the guiding of guide rod 5 and following guide rod 5 length directions and moving at

first end

51 and 52 of the second ends, the effect of secondary guide 6 is then cooperating the unlikely upset to keep its native mode of guide rod 5 together support optical read heads 7, so the supporting role of secondary guide 6 is greater than guide function.

Fixed sturcture comprises a firm joint device 81 and an elasticity compression bonding apparatus 82, the effect of firm joint device 81 is that the first end 51 of guide rod 5 mode with rigidity is fixed on the movement plate body 1, and the effect of elasticity compression bonding apparatus 82 then is compressed on the second end 52 of guide rod 5 on the movement plate body 1 in flexible mode.

Simultaneously with reference to Fig. 7, based on this notion, firm joint device 81 can utilize any rigidity locator meams that the first end 51 of guide rod 5 is positioned on the movement plate body 1, and present embodiment is a simplified illustration, firm joint device 81 is to adopt as described above that traditional approach has a butting section 811 that is formed in movement plate body 1 and projects upwards, and a screw lock is at the forcing piece 812 of

movement plate body

1,51 of first ends that make guide rod 5 in the butting section 811 with forcing piece 812 in the middle of, the taper surface of borrowing forcing piece 812 head end lower edges to form, compressing guide rod 5 first ends 51 make the first end 51 of guide rod 5 tightly be positioned at the centre of butting section 811 with forcing piece 812 rigidly to butting section 811 contacts.

Cooperate Fig. 8 to shown in Figure 10 with Fig. 6 again, 82 of elasticity compression bonding apparatus have a stop section 821 that is formed in movement plate body 1 and projects upwards, an and elastic body 822 that extends from the spring 41 lower end one of wherein a roll-setting gear 4, make the second end 52 of guide rod 5 place the centre of stop section 821 and elastic body 822, and borrow elastic body 822 to compress the second end 52 of guide rod 5, and borrow elastic body 822 to apply an elastic force and push the second end 52 of guide rod 5 to produce transverse component with contact stop section 821, the second end 52 is held be positioned in the middle of stop section 821 and the elastic body 822 and can't moves freely, constitute an elasticity positioning action.

Fig. 6 and for example, secondary guide 6 is because of mainly acting on support of optical read head 7, therefore its two ends can be used to be fixed in the mode of rigidity as firm joint device 81 identical construction and be got final product, and the emphasis of the utility model institute demand is not had direct relation, so repeated description not.

After the assembling, the first end 51 of guide rod 5 is positioned at respectively on the movement plate body 1 by firm joint device 81 and elasticity compression bonding apparatus 82 respectively with the second end 52, though being subjected to forcing piece 812, first end 51 tightly is positioned at rigidly on movement plate body 1 surface, and the phenomenon of perk is slightly arranged because of the differ the second end 52 that may cause guide rod 5 of the flatness on movement plate body 1 surface on movement plate body 1, but because the second end 52 is elastic body 822 location of suppressing by elastically deformable, so the displacement of the second end 52 perks can be absorbed (the second end 52 does not as shown in figure 10 contact movement plate body 1) by the deflection of elastic body 822, therefore still can keep the first end 51 of guide rod 5 constant with the relative position of the second end 52, meaning is that guide rod 5 does not have diastrophic phenomenon generation and can keep its axial linearly extended characteristic.Thus, the optical read head 7 that guided by guide rod 5 to move can remain on the fixing straight line and move.

Multiple with reference to figure 6, utilize the three group roll-setting gears 4 of 2 difference positions of Spindle Motor 3 and pedestal again in different corresponding positions, balance by spring 41 with the corresponding bolt 42 of each roll-setting gear 4, and the distance of 3 three relative pedestals 2 in diverse location place of adjustment Spindle Motor, by 3 geometric relationships that determine a plane, be the angle of inclination and the orientation of fine-tuning Spindle Motor 3 corresponding pedestals 2 (also be corresponding movement plate body 1 simultaneously), and then can adjust the Plane of rotation of the discs that the disk clamping holder 32 that is subjected to Spindle Motor 3 driven.So in case after adjusting the location, can guarantee the correctness of optical read head 7 reading/writing document on discs, and the guide rod that does not have a conventional optical disc drive produces distortion in the middle of fixing process and influence the reliability of optical read head 7 reading/writing documents.

In addition, in this preferred embodiment, elastic body 822 is to be connected with the spring 41 of an immediate roll-setting gear 4, in fact can be by spiral helicine spring 41 lower ends further downwards and turn to side institute one to extend.This way is solid memder that elastic body 822 and spring 41 are combined into one, when being nested with positioning convex column 21 in correspondence, spring 41 can make elastic body 822 contact the second end 52 of guide rod 5 simultaneously, and the strength of the second end 52 of a compacting guide rod 5 is arranged when spring 41 also can make elastic body 822 during because of bolt 42 sealed being compressed simultaneously, but saving member number still can not improve packaging efficiency yet.

Moreover as shown in Figure 9, spring 41 with elastic body 822 is when the positioning convex column 21 that is nested with in correspondence, can contact the second end 52 of guide rod 5 earlier because of elastic body 822, this moment is if bolt 42 is not sealed, when making the other end of spring 41 be free state, spring 41 can be fallen to an other inclination by the influence of the reacting force of elastic body 822 on the contrary, causes spring 41 to be not easy to be fixed on the corresponding positioning convex column 21.In order to solve the puzzlement in this assembling, can be on pedestal 2 corresponding positioning convex column 21 sides increase the block wall 23 of a semicircular annular, the position of block wall 23 is to be positioned at the other side that spring 41 has elastic body 822 relatively, make when spring 41 is nested with on positioning convex column 21, elastic body 822 can be kept out by block wall 23 because of the reacting force that contact guide rod 5 acts on spring 41, make spring 41 can be linked in unchangeably on the positioning convex column 21, in order to the assembling of follow-up Spindle Motor 3 and the sealed operation of corresponding bolt 42.

Conclude above-mentioned, this novel CD drive is positioned on the movement plate body 1 with firm joint device 81 and elasticity compression bonding apparatus 82 respectively by guide rod 5 two ends, make guide rod 5 be the mode of rigidly fixing on one side, another side then is the flexible fastening mode, can therefore avoid the influence of movement plate body 1 flatness, and automatically to guide rod 5 deflections in addition absorption compensation extend to keep guide rod 5 axial straight lines, and then can guarantee the rectilinearity of optical read head 7 movement locus, in case can keeping it in assembling process, the rectilinearity of optical read head 7 motions stablizes, cooperate the adjustment at Spindle Motor 3 angles of inclination again, the reliability that can quite easily make optical read head 7 read data is greatly enhanced, and the accuracy requirement that does not have the complicated processes in the adjustment of conventional optical disc drive structure and assemble, so can reach the purpose of this utility model really.And in the middle of the above stated specification, though the spring 41 of the elastic body 822 of elasticity compression bonding apparatus 82 and a roll-setting gear 4 wherein forms solid memders, the kenel of in fact elastic body 822 and spring 41 being separated each self-forming individual member is not can not.In addition, firm joint device 81 is also non-certain with the design of elasticity compression bonding apparatus 82, and those who familiarize themselves with the technology can cooperate and is requiredly changed design, as long as have the fixed form that guide rod 5 two ends are suppressed with rigidity and elasticity respectively.

Claims

1, a kind of CD drive that has location guide and prevent the fixed sturcture of its distortion comprises a movement plate body, a guide rod, a fixed sturcture, and an optical read head that follows the motion of this guide rod length bearing of trend, it is characterized in that:

2, the CD drive that has location guide and prevent the fixed sturcture of its distortion as claimed in claim 1, it is characterized in that: this elasticity compression bonding apparatus comprises a stop section and an elastic body that is positioned on this movement plate body, and an end of this guide rod then is clamped in the middle of this stop section and this elastic body.

3, the CD drive that has location guide and prevent the fixed sturcture of its distortion as claimed in claim 2, it is characterized in that: this CD drive also includes a pedestal and that is fixed on this movement plate body and is positioned at Spindle Motor on this pedestal, this pedestal is provided with most roll-setting gears in different corresponding positions respectively with this Spindle Motor, this each roll-setting gear comprises that then two ends are connected to the spring between this pedestal and this Spindle Motor respectively, and a bolt that is spirally connected this pedestal and this Spindle Motor.

4, the CD drive that has location guide and prevent the fixed sturcture of its distortion as claimed in claim 3 is characterized in that: the elastic body of this elasticity compression bonding apparatus is to be connected in this roll-setting gear spring wherein.

5, the CD drive that has location guide and prevent the fixed sturcture of its distortion as claimed in claim 1, it is characterized in that: this firm joint device has one and is positioned at butting section on this movement plate body and the screw lock forcing piece at this movement plate body, and an end of this guide rod tightly is positioned in the middle of this butting section and the forcing piece.