CN102376320A - Motor And Disc Driving Device - Google Patents
Motor And Disc Driving Device Download PDFInfo
- Publication number
- CN102376320A CN102376320A CN2011101894582A CN201110189458A CN102376320A CN 102376320 A CN102376320 A CN 102376320A CN 2011101894582 A CN2011101894582 A CN 2011101894582A CN 201110189458 A CN201110189458 A CN 201110189458A CN 102376320 A CN102376320 A CN 102376320A
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- China
- Prior art keywords
- peristome
- box
- disc
- central
- pawl
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/0284—Positioning or locking of single discs of discs rotating during transducing operation by clampers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Rotational Drive Of Disk (AREA)
Abstract
The invention provides a motor and disc driving device provided with a central box, a plurality of elastic components in the central box and claw components pushed by the elastic components. The central box is made of resin material and provided with a plurality of first opening parts formed by cutting a first part of a guide part inwardly from the first part in a radial manner, a plurality of gravity center adjusting claws arranged on the periphery alternatively with the first opening parts, a plurality of base project parts extending from the outer periphery of a box base to the first opening parts, and second opening parts formed in an upper part of the box in an axial upper side of the base project parts. Sprue marks formed in molding of the central box is arranged in an upper part of the box and is arranged in a region between a straight line connecting a periphery centers of the gravity center adjusting claws and a center axis and the opening part closest to the ground in the front of a rotation direction from the straight line, or in a region between straight line connecting a periphery centers of the gravity center adjusting claws and a center axis and the opening part closest to the ground in the rear of a rotation direction from the straight line.
Description
Technical field
The present invention relates to a kind of motor that possesses the gripping mechanism of the disc that fixedly has center pit.
Background technology
In the past, in disc drive appts, use can keep the gripping mechanism of Blu-ray disc, DVD (digital versatile disc), CD CDs such as (compact disc) removably.Below, abbreviate these CDs as " disc ".Gripping mechanism is installed in the rotating part of motor.Disc rotates with rotating part.
Slim gripping mechanism has a plurality of claw components.A plurality of claw components are that the center disposes radially by the central shaft with motor.In addition, claw component is by backup laterally and radially slippage.In central box, be formed with a plurality of and the claw component corresponding opening.Claw component by with from the opening of central box towards the outstanding state configuration of foreign side radially.In central box, be formed be disposed at the axostylus axostyle same axis on through hole.In this through hole, insert and leading to axostylus axostyle.
Central box is to process with the injection moulding that uses resin material to carry out.In the past, according to the resin flow situation in the mould, the shape that has central box was not given shape or the situation that in the size of central box, produces error.That is, central box produces the product deviation that is caused by resin flow property.Thus, in order to suppress these deviations, in central box, be provided with a plurality of cast gates.For example, in TOHKEMY 2004-327001 communique, dispose 3 place's cast gate traces.In addition, in this patent documentation, the cast gate trace is upwards consistent with the aligning pawl in week, and the cast gate trace is configured in than aligning pawl and also relies on radially inner side.
But, when utilizing injection moulding to process central box, utilize a pair of mould portion's formation within it die cavity.When resin was in a plurality of cast gates flow into mould, the resin that in die cavity, flows into from each cast gate will conflux at certain position.Position in that resin confluxes forms weld mark.Weld mark is compared the load that does not more tolerate from the outside with other position, is easy to generate crackle etc.In Fig. 1 of patent documentation 1, chuck and aligning pawl quilt be equivalent arrangements alternately.Weld mark is formed at the position of the radially inner side of claw component.In this case, if carry out the dismounting of disc repeatedly, just might in central box, crack with respect to claw component.
Summary of the invention
The present invention accomplishes in view of the above problems, and its fundamental purpose is, makes to be difficult in the central box crack.
The motor of the exemplary of one aspect of the present invention possesses: rotating part, and its upper end is used for fixing the gripping mechanism that can dismounting has the discoid disc of central opening portion; Bearing components, this rotary body of its free rotary ground supporting; Stationary part, itself and above-mentioned bearing components link, and have stator, and above-mentioned rotating part possesses: axostylus axostyle, it is the center rotation with the central shaft; Rotor is controlled device, and it rotates with above-mentioned axostylus axostyle, and the cylindrical portion cylindraceous that has discoideus annulus, extends to axial downside from the outer peripheral edges of above-mentioned annulus; Excitation is used magnet; It is fixed in the inboard of above-mentioned cylindrical portion; Face mutually with said stator, above-mentioned gripping mechanism possesses: the central box of being processed by resin material, be contained in a plurality of elastic components in the above-mentioned central box, be disposed at the radial outside of above-mentioned elastic component and by above-mentioned elastic component a plurality of claw components of backup respectively, above-mentioned central box possesses: the box base portion; Itself and above-mentioned spigot shaft coaxle ground dispose, and insert logical above-mentioned axostylus axostyle in central authorities; Box top, it extends towards foreign side radially from above-mentioned box base portion; Guidance part, it extends to axial downside along with relying on radial outside from the outer rim on above-mentioned box top; A plurality of first peristomes, they cut away the part of above-mentioned guidance part and above-mentioned box top are cut away towards radially inner side ground from an above-mentioned part and constitute; A plurality of aligning pawls, the alternately configuration on circumferentially of they and above-mentioned peristome, the outside of above-mentioned aligning pawl is positioned at than above-mentioned guidance part and also relies on radially foreign side; A plurality of slits, they are located at the circumferential two ends of each above-mentioned aligning pawl respectively, extend to the part on box top towards radially inner side from the radial outer end of above-mentioned guidance part; A plurality of proximal process portion, they extend towards above-mentioned first peristome from the outer peripheral face of above-mentioned box base portion, support above-mentioned elastic component; Second peristome; Its axial upside in above-mentioned proximal process portion is formed in the above-mentioned box top, and the cephalic par of above-mentioned claw component is outstanding to the radial outside of above-mentioned guidance part from above-mentioned peristome, and above-mentioned central box is so that the injection moulding that carries out with the mould with a plurality of cast gates is processed; On above-mentioned box top; When above-mentioned central box is formed a plurality of cast gate traces during the demoulding from above-mentioned mould, on above-mentioned box top, definition has the circumferential center that links each above-mentioned aligning pawl and the straight line of above-mentioned central shaft respectively; Above-mentioned cast gate trace is configured to be positioned at the arbitrary region in following zone; That is, from each above-mentioned straight line along launching clockwise, and on this clockwise sense of rotation above-mentioned each above-mentioned first peristome of configuration point-blank or the zone between each above-mentioned second peristome and each the above-mentioned straight line near each; Or from each above-mentioned straight line along launching counterclockwise, and on this counterclockwise sense of rotation above-mentioned each above-mentioned first peristome of configuration point-blank or the zone between each above-mentioned second peristome and each the above-mentioned straight line near each.
Utilize the present invention, can suppress the generation of the crackle in the central box.
Description of drawings
Fig. 1 is the longitudinal diagram of disc drive appts.
Fig. 2 is the longitudinal diagram of electric machine assembly.
Fig. 3 is the longitudinal diagram of gripping mechanism.
Fig. 4 is the vertical view of gripping mechanism.
Fig. 5 is the vertical view of claw component.
Fig. 6 is the longitudinal diagram of claw component.
Fig. 7 is the enlarged drawing of the head end of claw component.
Fig. 8 is the longitudinal diagram of gripping mechanism.
Fig. 9 is the figure of the action of expression claw component.
Figure 10 is the figure of the action of expression claw component.
Figure 11 is the figure of the action of expression claw component.
Figure 12 is the figure of the action of expression claw component.
Figure 13 is the figure of the action of expression claw component.
Figure 14 is the enlarged drawing of cephalic par.
Figure 15 is the enlarged drawing of cephalic par.
Figure 16 is the enlarged drawing of cephalic par.
Figure 17 is the vertical view of gripping mechanism.
Figure 18 is other the vertical view of embodiment of expression gripping mechanism.
Figure 19 is other the vertical view of embodiment of expression gripping mechanism.
Figure 20 is other the vertical view of embodiment of expression gripping mechanism.
Description of reference numerals: 1 electric machine assembly, 9 discs, 20 rotating parts, 30 stationary part, 40 gripping mechanisms, 41 central box; 42 claw components, 43 elastic components, 44 disc released parts, 50 disc drive appts, 51 visit portions, 52 housings; 91 center pits, 412 box tops, 413 box sidepieces (guidance part), 414 openings, 415 aligning pawls, 416 pawl guide parts; 417 proximal process portions, 419 flanges, 420 slits, 421 cast gate traces, below 454 (the box tops), 458 barrel surface; 4121 crosslinked portions, 4,141 first peristomes, 4,142 second peristomes, A1 zone, J1 central shaft, L1 straight line.
Embodiment
In this instructions, on central shaft J1 direction, abbreviate the upside among the figure as " upside ", abbreviate the downside among the figure as " downside "." upside " reaches " downside " such statement not necessarily need be consistent with gravity direction.
(structure of disc drive appts)
Fig. 1 is the longitudinal diagram of disc drive appts 50 of an embodiment of exemplary of the present invention.Disc drive appts 50 possesses: electric machine assembly 1, visit portion 51, housing 52.Accommodate electric machine assembly 1 and visit portion 51 in the inside of housing 52.Electric machine assembly 1 makes disc 9 rotations of recorded information.Visit portion 51 possesses: 511, head moving mechanism 512.511 is light mechanism for picking, carries out " reading " and/or " writing " to the information of disc 9.Head moving mechanism 512 makes 511 to move with respect to electric machine assembly 1 and disc 9.511 have: light injection part, light accepting part.The light injection part is ejaculation laser below disc 9.Laser is in the surface reflection of disc 9.Light accepting part is accepted the reflected light from disc 9.Housing 52 has cap 521 on top.Cap 521 reaches " during taking-up " in " during the assembling " of disc 9 in disc drive appts 50 and opens and closes respectively.
In disc drive appts 50, gripping mechanism 40 is installed at the upside of electric machine assembly 1.Gripping mechanism 40 is embedded the center pit 91 of disc 9.Like this, disc 9 just is fixed in the electric machine assembly 1.Along with the driving of electric machine assembly 1, disc 9 is rotated.In addition, meanwhile head moving mechanism 512 with 511 desired positions that move to radially.Like this, just can utilize 511 " the reading " and/or " writing " of carrying out to the information of disc 9.
(structure of electric machine assembly)
Fig. 2 is the longitudinal diagram of electric machine assembly 1.Electric machine assembly 1 possesses: DYN dynamic motor 10, gripping mechanism 40.Gripping mechanism 40 can keep disc 9 removably.Motor 10 possesses: rotating part 20, stationary part 30.Rotating part 20 is the center rotation with central shaft J1.Stationary part 30 can support rotating part 20 rotatably.Gripping mechanism 40 is installed in the upper end (promptly opposite with stationary part 30 side) of rotating part 20.In following explanation, will be radially the abbreviating as of center " radially " with central shaft J1 respectively, will be circumferentially the abbreviating as of center " circumferentially " with central shaft J1, abbreviate the direction parallel as " axially " with central shaft J1.
Rotating part 20 has: axostylus axostyle 21, rotor are controlled device 22.Axostylus axostyle 21 is to be the approximate circle column at center with central shaft J1.It is approximate cylinder shapes that lid is arranged that rotor is controlled device 22.Rotor is controlled device 22 and is had: axostylus axostyle fixed part 221, annulus 222, cylindrical portion 223.Axostylus axostyle fixed part 221 is cylindric.Axostylus axostyle 21 is embedded in the axostylus axostyle fixed part 221.That is, the top of axostylus axostyle 21 is fixed in rotor and controls in the device 22.Annulus 222 launches to radial outside from the bottom of axostylus axostyle fixed part 221.Cylindrical portion 223 is cylindric, and extends to downside from the outer peripheral edges of annulus 222.Circular excitation is utilized the inner peripheral surface that is adhesively fixed in cylindrical portion 223 with magnet 23.And excitation also can be utilized with magnet 23 and be pressed into the inner peripheral surface that is fixed in cylindrical portion 223.
Sleeve 31 is for example formed by the oil-containing sintering metal.Inside at bearing liner 32 maintains lubricating oil.Lubricating oil is being flooded at 31 places at sleeve.The inner peripheral surface of sleeve 31 is folder bearing surfaces across the outer peripheral face of lubricating oil supporting axostylus axostyle 21.Bearing liner 32 has: cylindrical portion 321, stator fixed part 322.Cylindrical portion 321 is fixing with sleeve 31.Constitute bearing components by sleeve 31 and bearing liner 32.Stator fixed part 322 launches to radial outside from the bottom of cylindrical portion 321.Stator 35 is utilized and is adhesively fixed in stator fixed part 322 places.Below bearing liner 32, form inside protrusions portion 323, outside jut 324.Inside protrusions portion 323 is fixing with flat board 33.Outside jut 324 is disposed at the radial outside of inside protrusions portion 323, and installing plate 37 is fixing.
In the upper end of cylindrical portion 321, form to the outstanding flange part 391 of radial outside.The jut 241 of anticreep member 24 is positioned at the below of flange part 391.The edge of the central shaft J1 side of jut 241 is positioned at the radially inner side of the outer peripheral edges of flange part 391.When rotating part 20 made progress side shifting, the top of jut 241 will contact with the following of flange part 391.Like this, rotating part 20 just is restricted to moving of upside.On bearing liner 32, be provided with circular precompressed magnet 25.Precompressed magnet 25 is faced with anticreep member 24 in the axial direction mutually.Between precompressed magnet 25 and anticreep member 24, produce the attractive force of magnetic.Limit rotating part 20 moving whereby to upside.
(structure of gripping mechanism)
Fig. 3 is the enlarged drawing of gripping mechanism 40.Only express the section on the central shaft J1 right side from Fig. 3.Fig. 4 is the vertical view of gripping mechanism 40.
In box top 412 and box sidepiece 413, be formed with a plurality of openings 414.A plurality of openings 414 by along with central shaft J1 be the center circumferentially with the equal angles arranged spaced.Opening 414 is made up of first peristome 4141, second peristome 4142.
Second peristome, 4142 quilts are located at the respectively radially inner side of first peristome 4141 accordingly with the circumferential position of each first peristome 4141.Between first peristome 4141 and second peristome 4142, form crosslinked 4121.Second peristome 4142 is squarish when overlooking.The circumferential width of second peristome 4142 is narrower than first peristome 4141.
In box sidepiece 413, be provided with a plurality of aligning pawls 415.Aligning pawl 415 is configured between 2 first peristomes 4141 that adjoin each other.A pair of slit 420 from the radial outer end of box sidepiece 413 towards radially inner side extend to the part on box top 412.A pair of slit 420 is configured in the Zhou Fangxiang two ends of aligning pawl 415.So, aligning pawl 415 with respect to box top 412 by with cantilever-shaped supporting.And the length that slit 420 extends to radially inner side is preferably set to 1/3 longer than the radius on box top 412.In addition, the circumferential width of aligning pawl 415 (being the interval of a pair of slit 420) is preferably set to wideer than the circumferential width of first peristome 4141.The outside of aligning pawl 415 is positioned at the radially foreign side of box sidepiece 413.When being fixed in disc 9 in the gripping mechanism 40, the head end of aligning pawl 415 and the center pit of disc 91 butts.At this moment, aligning pawl 415 is to the radially inner side deflection, is coaxial with the Center-to-Center axle J1 aligning of the center pit 91 of disc.And the position that does not form first peristome 4141 and aligning pawl 415 in the box sidepiece 413 becomes guidance part.Guidance part guides the inner peripheral surface of disc 9 swimmingly.Guidance part is compared with aligning pawl 415 and is difficult to deflection.The inner peripheral surface of disc 9 can not be positioned at the radially inner side of guidance part.Like this, the central shaft J1 of gripping mechanism 40 will be consistent basically with the central shaft of disc 9.
As shown in Figure 3, in the bottom of box base portion 411, the approximate columned proximal process of formation portion 417.Proximal process portion 417 is outstanding towards radial outside.The position of proximal process portion 417 is when overlooking and the position consistency of second peristome 4142.In addition, the radical length of proximal process portion 417 and circumferential width are littler than second peristome 4142.One side's of elastic component 43 end embeds in the proximal process portion 417.In the bottom of claw component 42, form approximate columned pawl side projecture part 424.Pawl side projecture part 424 is outstanding towards radially inner side.The opposing party's of elastic component 43 end embeds in the pawl side projecture part 424.Downside at the claw component 42 of first peristome 4141 is provided with pawl guide part 416.Pawl guide part 416 is outstanding towards the top from the bottom of first peristome 4141.Pawl guide part 416 extends along circumferential from guidance part.In addition, pawl guide part 416 is blocked at the circumferential middle body of first peristome 4141.At the radial outside of pawl guide part 416 and guidance part, be provided with the flange 419 that launches to radial outside.Pawl guide part 416 is bearing claw member 42 from the below, guides moving of claw component 42.
As shown in Figure 4,412 form a plurality of cast gate traces 421 on box top.In this embodiment, cast gate trace 421 is formed at 3 places.Cast gate trace 421 is configured in the clockwise direction of each first peristome 412, and is configured between each first peristome 412 and the immediate slit 420 of CW.In addition, each cast gate trace 421 is configured in than the inner radially of first peristome 4141 and the radial inner end of slit 420 and also relies on radial outside.
With reference to Figure 17, straight line L1 is with the circumferential central link of central shaft J1 and each aligning pawl 415.Zone A1 launches to counter clockwise direction from straight line A1, and the zone between first peristome 4141 or the second hole portion 4142 and straight line L1.As long as each cast gate trace 421 is formed among the A1 of this zone.
Fig. 5 is the vertical view of claw component 42.Among Fig. 5, the right side of claw component 42 is cephalic pars.Fig. 6 is the longitudinal diagram of central authorities of the claw component 42 of the position represented with arrow A among Fig. 5, also expresses the shape of cross section with the lining.Claw component 42 possesses: claw main body 61 and a plurality of blade part 62.In this embodiment, the number of blade part 62 is 2.When being fixed in disc 9 in the gripping mechanism 40, claw main body 61 and disc 9 butts.Blade part 62 rearward reaches the side expansion from two sidepieces of claw main body 61.Blade part 62 possesses inboard blade part 621, outside blade part 622.Inboard blade part 621 directly rearward extends from claw main body 61.Inboard blade part 621 is positioned at the side of elastic component 43.Outside blade part 622 is positioned at the more lateral of inboard blade part 621, further rearward extends.
Central authorities at circumferential disc pushing face 651 are provided with slot part 652.Slot part 652 extends towards central shaft J1 from the position away from head end 630.The bottom surface 653 of slot part 652 along with near central shaft J1 towards the below.Bottom surface 653 is the faces with pawl guide part 416 (with reference to Fig. 3) sliding contact.Below bottom surface 653 is called " first sliding contact surface ".
First sliding contact surface 653 has: inboard first sliding contact surface 654, the outside first sliding contact surface 655.Inboard first sliding contact surface 654 is present in the scope that indicates symbol 71.The outside first sliding contact surface 655 is present in the scope that indicates symbol 72.Inboard first sliding contact surface 654 is positions of inboard radially.The outside first sliding contact surface 655 is positions of the radial outside of inboard first sliding contact surface 654.The angle that the outside first sliding contact surface 655 is become with central shaft J1, littler than inboard first sliding contact surface 654 with the angle that central shaft J1 is become.In other words, the outside first sliding contact surface 655 is bigger with respect to the pitch angle on the plane vertical with central shaft J1 than inboard first sliding contact surface 654 with respect to the pitch angle on the plane vertical with central shaft J1.Among Fig. 6, the differential seat angle between inboard first sliding contact surface 654 and the outside first sliding contact surface 655 is represented with symbol theta.Inboard first sliding contact surface, 654 quilts are connected with the outside first sliding contact surface 655 smoothly.Specifically, be that radius-of-curvature is the curved surface about 1mm near the boundary of inboard first sliding contact surface 654 and the outside first sliding contact surface 655.
Fig. 7 amplifies the figure of expression with near the cross section the cephalic par 63 of claw component 42.Cephalic par 63 has end surface 631.Among Fig. 7, end surface 631 is (radially foreign side) towards the right side.End surface 631 is positioned at the upside of disc pushing face 651.The cross section of end surface 631 is linearities.Downside chamfer shape face 633 is between end surface 631 and disc pushing face 651.Downside chamfer shape face 633 is the curve-like towards the protrusion of foreign side radially in the cross section.Among Fig. 7, the radius-of-curvature of downside chamfer shape face 633 is indicated symbol R1.Here, the radius of curvature R 1 of downside chamfer shape face 633 is below the above 0.2mm of 0.1mm.Above 64 cross section be the linearity vertical with respect to central shaft J1.At the upside of end surface 631, above 64 towards the footpath inwardly the side extend.Upside chamfer shape face 635 top 64 and end surface 631 between.Upside chamfer shape face 635 in the cross section haply towards above the protrusion.The radius-of-curvature of upside chamfer shape face 635 is indicated symbol R2.Here, the radius of curvature R 2 of upside chamfer shape face 635 is below the above 0.3mm of 0.1mm.
Likewise, the upper end 637 of end surface 631 is the normal of downside chamfer shape face 633 and the point that disc pushes the normal parallel of face 651.Upper end 637 can be regarded the boundary of downside chamfer shape face 633 and disc pushing face 651 as.End surface 631, upside chamfer shape face 635 and top 64 are also connected smoothly.The point of the normal parallel of the normal of upside chamfer shape face 635 and top 64 also is defined as upside chamfer shape face 635 and top 64 boundary.
And the shape if ignore the chamfer shape face with end surface 63 shows more simplifiedly, then we can say, end surface 631 is connected with disc pushing face 651 smoothly, also is connected smoothly with top 64.We can say that in addition end surface 631 is the head end of cephalic par 63 with the boundary of disc pushing face 651.
As shown in Figure 6, be second sliding contact surface 623 below the rear end of the following and outside blade part 622 of inboard blade part 621.The box inner bottom surface is that definition one of is accommodated in the face in space of claw component 42 in central box 41.Second sliding contact surface 623 and the sliding contact of box inner bottom surface.These second sliding contact surfaces 623 are planar with the cylinder of radially vertical and level for being similar to dome shape or central shaft.Among Fig. 3, the box inner bottom surface is indicated symbol 442.In this embodiment, box inner bottom surface 442 rotors are controlled above the device 22.But box inner bottom surface 442 is not limited thereto, and also can be face in addition.
The rear end of outside blade part 622 has to the outstanding rear end teat 624 in top.The surface of rear end teat 624 is of the back, is the 3rd sliding contact surface 625 that contacts with the slip underneath on box top 412.
Fig. 8 is the longitudinal diagram of gripping mechanism 40, and the state of disc 9 is not installed in expression.Omitted the diagram of elastic component 43 among Fig. 8.In following identical figure, likewise omit the diagram of elastic component 43.In addition, Fig. 8 has also represented the structure of the cross section on claw component 42 and box top 421 with lining (the inside side's side in footpath).Box top 412 possesses outstanding direction protrusion 418 downwards.Direction protrusion 418 is positioned at the top of rear end teat 624.Among Fig. 4, direction protrusion 418 is represented its position with fine rule.Direction protrusion 418 has box introversion inclined-plane 453.Box introversion inclined-plane 453 along with relying on central shaft J1 towards the top.In other words, 454 possess box introversion inclined-plane 453 below.
Under state shown in Figure 8, the top of pawl guide part 416 and inboard first sliding contact surface, 654 butts.The face 451 of the radially inner side of pawl guide part 416 and face 452 butts towards radial outside of the bottom of claw main body 61.Box introversion inclined-plane 453 and the 3rd sliding contact surface 625 butts.
(action of gripping mechanism)
Below, the action of gripping mechanism 40 is described.Fig. 9 is the figure that is used for explaining the action of the claw component 42 when gripping mechanism 40 is installed discs 9 to Figure 12.At first, as shown in Figure 9, top 64 butts of the edge of the downside of the center pit 91 of disc 9 and claw component 42.Express the consistent situation of Center-to-Center axle J1 of disc 9 among Fig. 9.And when mounted, disc 9 is always not certain to the butt position of claw component 42.
When the cephalic par 63 of claw component 42 descended slightly, the 3rd sliding contact surface 625 and box introversion inclined-plane 453 will sliding contacts, make claw component 42 towards the footpath inwardly the side move.Like this, pawl guide part 416 will be from first sliding contact surface, the 655 ground sliding contact successively to the outside of inboard first sliding contact surface 654.Inboard first sliding contact surface 654 is connected with the outside first sliding contact surface 655 smoothly.Thus, will carry out moving of claw component 42 swimmingly.
When from state shown in Figure 9, disc 9 will be shown in figure 10 by when lower side further is pressed into, and blade part 62 descends.Like this, second sliding contact surface 623 just with box inner bottom surface 442 butts.Thereafter, second sliding contact surface 623 and box inner bottom surface 442 butts, claw component 42 radius vectors inwardly move the side simultaneously.At this moment, the outside first sliding contact surface 655 and 416 sliding contacts of pawl guide part.After this, cephalic par 63 descends, and claw component 42 is along clockwise rotating among Figure 10.
After this, when shown in figure 11, when cephalic par 63 moved to the inner peripheral surface of center pit 91, cephalic par 63 will contact with the inner peripheral surface of center pit 91, moves to the top simultaneously.But, the face 64a because of about shown in Figure 5 top 64 and the butt on box top 412, the mobile of cephalic par 63 is restricted.As shown in Figure 7, end surface 631 is connected with disc pushing face 651 smoothly.Thus, cephalic par 63 just can pass through center pit 91 swimmingly.
When disc 9 by when state shown in Figure 11 further is pressed into, will be shown in figure 12, the inboard blade part 621 and second sliding contact surface 623 and 442 sliding contacts of box inner bottom surface.Meanwhile claw component 42 radius vectors move to foreign side.At this moment, the edge of the upside of center pit 91 and disc pushing face 651 sliding contacts.Like this, the head end of claw component 42 is just deviate to the top from center pit 91.When disc 9 during with disc putting surface 441 butts, box inner bottom surface 442 just with second sliding contact surface, 623 butts.And, disc pushing face 651 and center pit 91 butts.In addition, face 64a and box top 412 butts.Utilize disc pushing face 651, to disc 9 effects towards the power of foreign side and below radially.Thus, disc 9 just is supported on the disc putting surface 441.
As stated, put in 44 last times of disc released part at disc 9, each cephalic par 63 of a plurality of claw components 42 moves up and down, and radially moves.
But, have recess that the standard of disc 9 allows or by the bad recess that causes of fitting at the inner peripheral surface of center pit 91 sometimes.Figure 13 is the figure of the appearance of expression cephalic par 63 recess 92 that embeds the inner peripheral surface that is formed at center pit 91.Embed under the situation of recess 92 at cephalic par 63, cephalic par 63 can't move to the top.Like this, be known as the so-called phenomenon that partly tightens even put the phenomenon that also can't from recess 92, deviate from disc released part 44 epicephalon ends 63 at disc 9.In addition, under the situation that has the ladder beyond the recess 92, also might produce half chucking phenomenon.In the gripping mechanism 40 of this embodiment, be to tackle according to the mode that does not produce this kind half chucking phenomenon.
Figure 14 is the enlarged drawing of cephalic par 63.Among Figure 14, represent the barrel surface 457 that the lateral surface 456 with central box 41 prolongs to the top imaginaryly with double dot dash line.Barrel surface 457 is to be the barrel surface at center with central shaft J1, is the face tangent with the periphery of box sidepiece 413.The cephalic par of representing with double dot dash line 63 and with the cephalic par 63 that solid line is represented is expressed moving the claw component 42 of head end 630 when barrel surface 457 is depressed.That is moving of the cephalic par 63 when, Figure 14 expresses cephalic par 63 embedding recesses 92 haply.In fact, the head end 630 that embeds recess 92 stretches out to the radial outside of barrel surface 457.
In the gripping mechanism 40, position 681 is head ends 630 by pawl guide part 416 when barrel surface 457 is depressed and claw component 42 position of butt at first.Position 681 is positioned on first sliding contact surface 655 of the outside.Here; Suppose to be under the situation on a plane with 653 global designs of first sliding contact surface; First sliding contact surface 653 just becomes the angle and the outside first sliding contact surface 655 angle with respect to the size of the centre of the angle of with central shaft J1 vertical direction of inboard first sliding contact surface 654 with respect to the direction vertical with central shaft J1 with respect to the pitch angle of the direction vertical with central shaft J1.Like this, compare with situation shown in Figure 14, under the situation of first sliding contact surface 653 and pawl guide part 416 butts, claw component 42 suffered towards the footpath inwardly the size of the power of side will diminish.Consequently, cephalic par 63 can not be deviate from from recess 92, and the possibility that blade part 62 lifts uprises.Like this, in gripping mechanism 40,, prevent the generation of half chucking phenomenon through being provided with different inboard first sliding contact surface 654 and the outside first sliding contact surface 655 respectively.Certainly, the outside first sliding contact surface 655 need arrive the height suitable with the half the thickness of disc 9 butt before at head end 630 with pawl guide part 416.
In addition, in gripping mechanism 40, butt position 681 is consistent haply with the boundary of disc pushing face 651 with the outside first sliding contact surface 655.That is, butt position 681 is very near the position of this boundary.Like this, just can avoid in disc pushing face 651, slot part being set up to cephalic par 63 ground.Consequently, can guarantee the intensity and the permanance of cephalic par 63.
In gripping mechanism 40, be provided with inboard first sliding contact surface 654 and the outside first sliding contact surface 655.Like this, just with the situation that first sliding contact surface 653 is made as a plane Comparatively speaking, be pressed into that necessary power will be maximum in being pressed into of disc 9 of initial stage of operation of disc 9.In other words, through inboard first sliding contact surface 654 and the outside first sliding contact surface 655 are set, the rotation of the claw component 42 in the time of just can reducing the disc installation and the decline of cephalic par 63.This kind effect also helps to prevent the generation of half chucking phenomenon.Utilize the sliding contact on the 3rd sliding contact surface 625 and box introversion inclined-plane 453, also can limit the rotation of claw component 42 and the decline of cephalic par 63.
On the other hand, in claw component 42, the circumferential central authorities that push face 651 at disc are provided with slot part 652.The bottom surface of slot part 652 becomes first sliding contact surface 653.So, with sliding contact surface is located at about claw component in the past Comparatively speaking, in gripping mechanism 40, can make butt position 681 42 of claw components towards direction on be positioned at radial outside.This is because pawl guide part 416 can't be located at the radial outside of central box 41.Consequently, cephalic par 63 is more easily deviate from from recess 92.
Specifically, shown in figure 15, imagination goes out fulcrum 681, force 682 and application point 683.Fulcrum 681 is above-mentioned butt positions 681.Force 682 is to regard the point that 43 pairs of claw components 42 of elastic component apply elastic force as.682 places in the force, effect is towards the power of the downside of fulcrum 681.Application point 683 is head ends of cephalic par 63.As stated, in gripping mechanism 40, can fulcrum 681 be disposed at radial outside at an easy rate.Thus, can reduce distance and the ratio of the distance between fulcrum 681 and the application point 683 between fulcrum 681 and the force 682.Consequently, can realize cephalic par 63 is applied a big power at an easy rate, make it to deviate to the top from recess 92.
In gripping mechanism 40, cephalic par 63 is applied the power towards the top, and as previously mentioned, utilize the butt of the outside first sliding contact surface 655 and pawl guide part 416, act on towards the footpath the inwardly power of side.Like this, just can realize preventing more reliably the generation of half chucking phenomenon.
And, in design, also to imagine and be difficult to make butt position 681 near the situation of the outside first sliding contact surface 655 with the boundary of disc pushing face 651.But also preferably shown in figure 16 in this case, the distance radially 73 between butt position 681 and this boundary 657 is less than the distance radially 74 between head end 630 and the boundary 657.Like this, just can guarantee the intensity and the permanance of cephalic par 63.
(about the shaping of central box)
Shaping to central box 41 describes.
At first, make first mould and the second mould butt, between first mould and second mould, form die cavity.
Then, pass the cast gate that is formed in first mould, in die cavity, flow into fusion resin.
Next, the cooling of the resin in the die cavity is solidified.Resin in the die cavity becomes the shape of central box 41 because of being cured.
Open a pair of mould pin that from second mould the outstanding demoulding use thereafter.The pin that the demoulding is used contacts with following 454 of box top 412.Like this, central box 41 just and mould separating.At this moment, cut off central box 41 from cast gate.Because this cuts off, cast gate just becomes cast gate trace 421 with the part that central box 41 links to each other originally.
It more than is the forming step of central box 41.But,, in the central box 41 of this embodiment, be provided with a plurality of cast gates (cast gate trace 421) with reference to Figure 17.Here, the number of cast gate trace 421 is 3 places.In fusion resin in a plurality of cast gates flow into die cavities the time, have the situation that forms weld mark in the part that resin confluxed that flows into from each cast gate.
In die cavity, the resin of inflow flows in the wide part of stream easily.That is to say that the resin of inflow is after flowing to the wide part of stream, the part narrow at stream flows.Thus, the narrow part of stream just becomes the part that resin confluxed that flows into from each cast gate easily.If the such structure of central box 41, then, flow into narrower respectively at the radially inner side of crosslinked 4121, pawl guide part 416 and second peristome 4142.So, form weld mark easily in these parts.
In addition, under the situation that has produced weld mark, if because of repeated disassembled and assembled of disc etc., near stress application repeatedly weld mark then just might cause the generation of crackle near weld mark.Particularly, if the such structure of central box 41, the radially inner side width of then crosslinked 4121, pawl guide part 416 and second peristome 4142 will narrow down.If form weld mark, just crack at these positions easily at these positions.
In addition, fastening for central box 41 and axostylus axostyle fixed part 221 has box base portion 411 is pressed into axostylus axostyle fixed part 221 and fixed method or box base portion 411 is pressed into axostylus axostyle fixed part 221 backs and with bonding ground fixed method.At this fastening position,, always circumferentially producing internal stress, thereby be in the environment that is easy to crack, to use with respect to central box 41.
In this embodiment, cast gate is disposed at the clockwise direction of each first peristome 4141, and is disposed between each first peristome 4141 and the immediate slit 420a of CW.Through disposing cast gate like this, before the resin that flows into from a side cast gate (cast gate trace 421a) will solidify in die cavity, flow to crosslinked 4121a, pawl guide part 416a and the second peristome 4142a near.In addition, the resin that flows into from other cast gate (cast gate trace 421b, 421c) confluxes with resin from a side cast gate inflow at the position that is different from crosslinked 4121a, pawl guide part 416a and the second peristome 4142a.Here, straight line L1 links the circumferential center of central shaft J1 and each aligning pawl 415.Zone A1 is along expansion counterclockwise and the zone between the first peristome 4141a or the second peristome 4142a and straight line L1 from straight line L1.Each cast gate (cast gate trace 421) is as long as be formed among the regional A1 (diagram shadow part).
(variation)
More than, though embodiment of the present invention is illustrated, the present invention is not limited to above-mentioned embodiment, can carry out various changes.
For example, in above-mentioned embodiment, pawl guide part 416 is blocked.But, be not limited thereto.Also can be shown in figure 18, pawl guide part 416a and flange 419a are linked to each other at the circumferential middle body of first peristome 4141.
In addition, in the above-described embodiment, pawl guide part 416 is blocked at the circumferential middle body of first peristome 4141.But, be not limited thereto.For example, also can pawl guide part 416 be blocked in the clockwise circumferential end of first peristome 4141.For flange 419 also is identical.
In addition, in the above-described embodiment, definition has the straight line L1 of the circumferential Center-to-Center axle J1 that links each aligning pawl 415.In addition, each cast gate trace 421 is formed at from straight line L1 along expansion counterclockwise and the regional A1 between first peristome 4141 or second peristome 4142 and straight line L1.But the configuration of cast gate trace 421 is not limited thereto.Among Figure 19, straight line L1 links the circumferential center of central shaft J1 and each aligning pawl 415.Zone A2 launches and zone between first peristome 4141 or second peristome 4142 and straight line L1 from straight line L1 along clockwise direction.Also can be shown in figure 19, each cast gate trace 421d is formed among the regional A2.
In addition, in the above-described embodiment, each cast gate trace 421 is disposed at the radial outside of radial inner end of the inner radially and the slit 420 of first peristome 4141.But, be not limited thereto.Also can be shown in figure 20, each cast gate trace 421e is located at the radially inner side of first peristome 4141 or slit 420.
In addition, in the above-described embodiment, slot part 652 is set in claw component 42, slot part 652 slides with pawl guide part 416.But, be not limited thereto.Also slot part 652 can be set in claw component 42, but face 651 slides with pawl guide part 416.In addition, the position that also can slide at the sidepiece setting and the pawl guide part of claw component.
In addition, though in the above-described embodiment, be provided with flange 419, yet also can be provided with.
The number of claw component 42 also can be more than 3.The disc putting surface 441 of ring-type needs not be complete ring-type, so long as be that the center is shown ring-type greatly and existed with central shaft J1, then also can be the face that exists discontinuously.In addition, disc putting surface 441 also can be with a plurality of circular-arc parts along circumferentially equivalent arrangements or unequal configuration.
Gripping mechanism 40 can be used for driving the device of the various discs (so-called removable disc (Removable Disc)) beyond the CD.In addition, disc drive appts 50 is so long as be directed against any at least side that the information of disc 9 " reading " reaches " writing ", and the device that promptly carries out " reading " and/or " writing " gets final product.Disc drive appts 50 also can be type (with reference to Fig. 1) device in addition that opens and closes lid, for example also can be from housing, to see the so-called tray type of sending into the pallet that puts disc 9 off.
Utilizability in the industry
Motor of the present invention can be used for being directed against the various record disc drive units of reading and/or writing of the information of disc.
Claims (12)
1. a motor is characterized in that,
Possess:
Rotating part, its upper end is used for fixing the gripping mechanism that can dismounting has the discoid disc of central opening portion;
Bearing components, this rotary body of its free rotary ground supporting;
Stationary part, itself and said bearing components link, and have stator,
Said rotating part possesses:
Axostylus axostyle, it is the center rotation with the central shaft;
Rotor is controlled device, and it rotates with said axostylus axostyle, and the cylindrical portion cylindraceous that has discoideus annulus, extends to axial downside from the outer peripheral edges of said annulus;
Excitation is used magnet, and it is fixed in the inboard of said cylindrical portion, face mutually with said stator,
Said gripping mechanism possesses:
The central box of processing by resin material,
Be contained in a plurality of elastic components in the said central box,
Be disposed at the radial outside of said elastic component and by said elastic component a plurality of claw components of backup respectively,
Said central box possesses:
The box base portion, itself and said spigot shaft coaxle ground dispose, and insert logical said axostylus axostyle in central authorities;
Box top, it extends towards foreign side radially from said box base portion;
Guidance part, it extends to axial downside along with relying on radial outside from the outer rim on said box top;
A plurality of first peristomes, they cut away the part of said guidance part and said box top are cut away towards radially inner side ground from a said part and constitute;
A plurality of aligning pawls, the alternately configuration on circumferentially of they and said peristome, the outside of said aligning pawl is positioned at than said guidance part and also relies on radially foreign side;
A plurality of slits, they are located at the circumferential two ends of each said aligning pawl respectively, extend to the part on box top towards radially inner side from the radial outer end of said guidance part;
A plurality of proximal process portion, they extend towards said first peristome from the outer peripheral face of said box base portion, support said elastic component;
Second peristome, its axial upside in said proximal process portion is formed in the said box top,
The cephalic par of said claw component is outstanding to the radial outside of said guidance part from said peristome,
Said central box is so that the injection moulding that carries out with the mould with a plurality of cast gates is processed,
On said box top, when said central box is formed a plurality of cast gate traces during the demoulding from said mould,
On said box top, definition has the circumferential center of each said aligning pawl of binding and the straight line of said central shaft respectively,
Said cast gate trace is configured to be positioned at the arbitrary region in following zone, that is,
From each said straight line along launching clockwise, and on this clockwise sense of rotation said each said first peristome of configuration point-blank or the zone between each said second peristome and each the said straight line near each; Or
From each said straight line along launching counterclockwise, and on this counterclockwise sense of rotation said each said first peristome of configuration point-blank or the zone between each said second peristome and each the said straight line near each.
2. motor according to claim 1, wherein
The length of extending to radially inner side at the position that is disposed at said box top of said slit is greater than 1/3 of the radius on said box top.
3. motor according to claim 1 and 2, wherein
Each said cast gate trace is disposed at than the radial inner end of said first peristome and the radial inner end of said slit and also relies on radial outside.
4. according to any described motor in the claim 1 to 3, wherein the circumferential interval of a pair of said slit is greater than the circumferential width of said first peristome.
5. according to any described motor in the claim 1 to 4, wherein
Below each said claw component, be formed with respectively along with relying on foreign side radially gradually to first sliding contact surface of axially going up tilt,
At the axial downside of said first peristome, be formed with respectively from said guidance part to said first peristome extend and with the pawl guide part of the said first sliding contact surface sliding contact.
6. motor according to claim 5, wherein
Said pawl guide part extends to said first peristome from said guidance part in the both sides of said first peristome.
7. motor according to claim 5, wherein said pawl guide part and said guidance part link integratedly.
8. according to any described motor in the claim 1 to 7, wherein
Said rotor holding tool has the axostylus axostyle fixed part with the configuration of said spigot shaft coaxle ground,
The upper end of said axostylus axostyle is fixed in said axostylus axostyle fixed part,
In said cylindrical portion, be pressed into fixing said axostylus axostyle fixed part.
9. according to any described motor in the claim 1 to 8, wherein
Each said aligning pawl, each said first peristome, each said second peristome and each said cast gate trace are disposed with respect to said center axis point symmetrically.
10. disc drive appts is characterized in that having:
Any described motor in the claim 1 to 9,
To disc carry out information " reading " and/or " writing " visit portion,
Accommodate the housing of said motor and said visit portion.
11. motor according to claim 5, wherein
Each said pawl guide part is blocked at the circumferential middle body of said first peristome.
12. motor according to claim 5, wherein
Each said pawl guide part is blocked in the clockwise circumferential end of said first peristome.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-151060 | 2010-07-01 | ||
| JP2010151060A JP2012014801A (en) | 2010-07-01 | 2010-07-01 | Motor and disk driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102376320A true CN102376320A (en) | 2012-03-14 |
| CN102376320B CN102376320B (en) | 2014-06-18 |
Family
ID=45601034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110189458.2A Expired - Fee Related CN102376320B (en) | 2010-07-01 | 2011-06-30 | Motor and disc driving device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2012014801A (en) |
| KR (1) | KR101198003B1 (en) |
| CN (1) | CN102376320B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10241278A (en) * | 1997-02-25 | 1998-09-11 | Hitachi Ltd | Disk driving device |
| EP0579172B1 (en) * | 1992-07-13 | 1998-10-21 | Sony Corporation | Apparatus with disc cartridge loading device |
| JP3332869B2 (en) * | 1998-10-09 | 2002-10-07 | 油化電子株式会社 | Turntable device for information storage disk |
| CN1292428C (en) * | 2002-09-03 | 2006-12-27 | 松下电器产业株式会社 | Optical disk drive |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100513315B1 (en) | 2003-04-28 | 2005-09-09 | 삼성전기주식회사 | a holder for disc driver |
| JP4534256B2 (en) | 2006-11-16 | 2010-09-01 | 日本電産株式会社 | Chucking device, brushless motor and disk drive device |
| JP5076573B2 (en) | 2007-03-19 | 2012-11-21 | 日本電産株式会社 | Motor equipped with chucking device, and disk drive equipped with this motor |
| JP2009099224A (en) | 2007-10-18 | 2009-05-07 | Nippon Densan Corp | Chucking device, motor unit, and disk drive device |
-
2010
- 2010-07-01 JP JP2010151060A patent/JP2012014801A/en not_active Withdrawn
-
2011
- 2011-06-30 KR KR1020110064885A patent/KR101198003B1/en not_active IP Right Cessation
- 2011-06-30 CN CN201110189458.2A patent/CN102376320B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0579172B1 (en) * | 1992-07-13 | 1998-10-21 | Sony Corporation | Apparatus with disc cartridge loading device |
| JPH10241278A (en) * | 1997-02-25 | 1998-09-11 | Hitachi Ltd | Disk driving device |
| JP3332869B2 (en) * | 1998-10-09 | 2002-10-07 | 油化電子株式会社 | Turntable device for information storage disk |
| CN1292428C (en) * | 2002-09-03 | 2006-12-27 | 松下电器产业株式会社 | Optical disk drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012014801A (en) | 2012-01-19 |
| KR20120002941A (en) | 2012-01-09 |
| CN102376320B (en) | 2014-06-18 |
| KR101198003B1 (en) | 2012-11-05 |
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