CN102290878A - Electromotor and disc driving device - Google Patents
Electromotor and disc driving device Download PDFInfo
- Publication number
- CN102290878A CN102290878A CN201110168348A CN201110168348A CN102290878A CN 102290878 A CN102290878 A CN 102290878A CN 201110168348 A CN201110168348 A CN 201110168348A CN 201110168348 A CN201110168348 A CN 201110168348A CN 102290878 A CN102290878 A CN 102290878A
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- Prior art keywords
- fastening
- seat portion
- upper cover
- hole
- motor according
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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
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/15—Mounting arrangements for bearing-shields or end plates
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Rotational Drive Of Disk (AREA)
- Motor Or Generator Frames (AREA)
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
The invention provides an electromotor and a disc driving device. A resin part provided with a rolling channel part and a rotor keeper are integrated. And the resin part is provided with a clamping seat part. On the other hand, a blocking plate blocking the rolling channel part is provided with a clamping part. Furthermore, the clamping part and the clamping seat part are clamped. Therefore, the rolling channel part and the blocking plate are easily and firmly fixed. The clamping seat part is configured at a position in an overlapping with a through hole when observed from above. Therefore, during forming of the resin part, a die can be used to form the clamping seat part. Therefore, the shape of the clamping seat part can be obtained in high precision.
Description
Technical field
The present invention relates to motor and optical disc apparatus.
Background technology
In optical disc apparatus such as CD drive, be equipped with the brushless motor that is used to make the CD rotation.In recent years, be accompanied by the high power speedization of optical disc apparatus, have the tendency of the rotation high speed of brushless motor.When brushless motor during, be easy to generate the vibration that is accompanied by rotation with high speed rotating.As the one of the main reasons of the vibration that encourages brushless motor, can enumerate the heart of laying particular stress on of CD.The position of centre of gravity of CD is according to each CD and slightly different.Under the center of gravity and the inconsistent situation of pivot of the rotating part of combination brushless motor and the integral body that CD forms, be easy to generate the problem of vibration.
As the technology that the heart is revised that lays particular stress on to CD, open day disclosure communique spy and to have put down in writing following motor in the 2000-14113 communique: in the cross section is annulus between the rotating platform portion of the positioning body of U word shape and rotor, taken in a plurality of spheroids as balanced body.And, open day disclosure communique spy and to have put down in writing following motor in the 2000-245116 communique: in ring-type mobile space, be equipped with a plurality of steel balls as balanced body to move freely mode by housing body that is disposed at the upper space in the rotor subject and cover defined.In arbitrary document, when high speed rotating, all, spheroid as balanced body eliminates the weight imbalance by being moved.
[patent documentation 1] day disclosure communique spy opens the 2000-14113 communique
[patent documentation 2] day disclosure communique spy opens the 2000-245116 communique
Disclosure communique spy opens in the structure of 2000-14113 communique in day, and the cross section is the top of positioning body of U word shape by the rotor obturation.Therefore, do not need to be used for the plate of inaccessible positioning body with the configuration of rotor split ground.Even if suppose to dispose plate, this plate also is clamped between positioning body and the rotor.Therefore, obtain the constant intensity of plate easily.
On the other hand, disclosure communique spy opens in the structure of 2000-245116 communique in day, and the below of housing body is opened wide.And then, be equipped with cover in the mode that covers this opening.This cover preferably firmly fixes, in order to avoid should break away from by cover when rotation.And, preferably can as far as possible easily fix with respect to housing body unit during fabrication cover.
And, be used to take in the groove portion of spheroid and the constant intensity between the rotor holder in order further to improve, consider to utilize insert moulding that groove portion and rotor holder is integrated.In this case, in order to make groove portion from mold releasability, the shape that groove portion forms towards the top or opens wide towards the below.The inaccessible plate that like this, need be used for inaccessible groove portion.In this case, also preferably can easily and firmly fix inaccessible plate with respect to groove portion.
Summary of the invention
The object of the present invention is to provide a kind of can be easily and firmly fix the motor and the optical disc apparatus of inaccessible plate with respect to groove portion.
The application's the 1st invention relates to the motor that a kind of disc drives is used, and this motor possesses stationary part and rotating part, and this rotating part is supported to can be with respect to above-mentioned stationary part rotation.
Above-mentioned fastening portion has the armature that produces magnetic flux.
Above-mentioned rotating part has: metal rotor holder, this rotor holder have the cylindrical portion with the spigot shaft coaxle ground configuration of extending up and down; Rotating platform, this rotating platform contacts with the upper end of above-mentioned cylindrical portion, and directly or indirectly CD is supported from lower face side; Aligning portion, this aligning portion supports the interior perimembranous of CD; The groove portion of annular groove shape, this groove portion towards the top or the below open wide; Inaccessible plate, the inaccessible above-mentioned groove portion of this obturation plate; A plurality of spheroids, above-mentioned a plurality of spheroids are disposed at the circular space that is surrounded by above-mentioned groove portion and above-mentioned inaccessible plate in the mode of rolling freely along Zhou Fangxiang; And magnet, this magnet configuration is at the inner peripheral surface of above-mentioned cylindrical portion, and with above-mentioned armature at diametrically contraposition.
Resin component comprises above-mentioned groove portion and above-mentioned rotating platform, and this resin component and above-mentioned rotor holder are shaped to the formed body of one.
Above-mentioned formed body more has a plurality of through holes of arranging along Zhou Fangxiang by the position of radially inner side than above-mentioned groove portion.Above-mentioned resin component has fastening seat portion, and this fastening seat portion projects to overlooks when observing and above-mentioned through hole position overlapped.
Above-mentioned inaccessible integrated circuit board is due to above-mentioned fastening seat portion.
The application's the 2nd invention relates to the motor that a kind of disc drives is used, and this motor possesses stationary part and rotating part, and this rotating part is supported to can be with respect to above-mentioned stationary part rotation.
Above-mentioned stationary part has the armature that produces magnetic flux.
Above-mentioned rotating part has: metal rotor holder, this rotor holder have the cylindrical portion with the spigot shaft coaxle ground configuration of extending up and down; Rotating platform, this rotating platform contacts with the upper end of above-mentioned cylindrical portion, and directly or indirectly CD is supported from lower face side; Aligning portion, this aligning portion supports the interior perimembranous of CD; The groove portion of annular groove shape, this groove portion towards the top or the below open wide; Inaccessible plate, the inaccessible above-mentioned groove portion of this obturation plate; A plurality of spheroids, above-mentioned a plurality of spheroids are disposed at the circular space that is surrounded by above-mentioned groove portion and above-mentioned inaccessible plate in the mode of rolling freely along Zhou Fangxiang; And magnet, this magnet configuration is at the inner peripheral surface of above-mentioned cylindrical portion, and with above-mentioned armature at diametrically contraposition.
Resin component comprises above-mentioned groove portion and above-mentioned rotating platform, and this resin component and above-mentioned rotor holder are shaped to the formed body of one.Above-mentioned formed body more has a plurality of through holes of arranging along Zhou Fangxiang by the position of radially inner side than above-mentioned groove portion.
Above-mentioned inaccessible plate has: circular plate main part; And a plurality of fastening portion, above-mentioned a plurality of fastening portion extends from above-mentioned plate main part.
The face of above-mentioned through hole fastening in the opposite side of direction of opening wide above-mentioned formed body and above-mentioned groove portion passes in above-mentioned fastening portion.
According to the application's the 1st invention,, can fix groove portion and inaccessible plate easily and securely by making inaccessible integrated circuit board due to fastening seat portion.And fastening seat portion is disposed at when overlooking observation and the through hole position overlapped.Therefore, when carrying out moulding, can utilize mould that fastening seat portion is carried out moulding.Therefore, can obtain the shape of fastening seat portion accurately.
According to the application's the 2nd invention, the fastening portion fastening by making inaccessible plate can be fixed groove portion and inaccessible plate easily and securely in formed body.
Description of drawings
Fig. 1 is the partial, longitudinal cross-sectional of motor.
Fig. 2 is the longitudinal section of optical disc apparatus.
Fig. 3 is the longitudinal section of brushless motor.
Fig. 4 is the partial, longitudinal cross-sectional of rotating part.
Fig. 5 is a plane graph of observing rotor holder, resin component and inaccessible plate from upper surface side.
Fig. 6 is the vertical view of rotor holder.
Fig. 7 is the stereogram of inaccessible plate.
Fig. 8 is the flow chart of a part of operation that the manufacturing process of brushless motor is shown.
Fig. 9 is the partial, longitudinal cross-sectional of the related rotating part of the 1st variation.
Figure 10 is the partial, longitudinal cross-sectional of the related rotating part of the 2nd variation.
Figure 11 is the partial, longitudinal cross-sectional of the related rotating part of the 3rd variation.
Figure 12 is the stereogram of the related inaccessible plate of the 3rd variation.
Figure 13 is the partial, longitudinal cross-sectional of the related rotating part of the 4th variation.
Figure 14 is the partial, longitudinal cross-sectional of the related rotating part of the 5th variation.
Figure 15 is the partial, longitudinal cross-sectional of the related rotating part of the 6th variation.
Figure 16 is the partial, longitudinal cross-sectional of the related rotating part of the 7th variation.
Figure 17 is the partial, longitudinal cross-sectional of the related rotating part of the 8th variation.
Figure 18 is the partial, longitudinal cross-sectional of the related rotating part of the 9th variation.
Figure 19 is the partial, longitudinal cross-sectional of the related brushless motor of the 10th variation.
Figure 20 is the partial, longitudinal cross-sectional of the related rotating part of the 11st variation.
Label declaration
1... optical disc apparatus; 2,102... stationary part; 3,103,203,303,403,503,603,703,803,903,1003,1203... rotating part; 9... central shaft; 11... device case; 13,1113... brushless motor; 15... access portion; 24... armature unit; 31... axle; 32,132,332,732,932,1032,1132,1232... rotor holder; 32e, 132e... cylindrical portion; 32f, 332f, 932f, 1032f, 1232f... upper cover part; 32g, 232g, 432g, 532g, 632g, 732g, 832g, 932g, 1032g, 1132g... the 1st through hole; 33... rotor magnet; 34,134,734,834,934,1134... resin component; 35,135,235,335,435,535,635,735,1135, the inaccessible plate of 1235...; 36,136,536... spheroid; 40,140,440,640... formed body; 41,141... rotating platform; 42,142,542,642,742,1142,1242... groove portion; 42c, 642c, 742c, 1242c... inner wall part; 43,143,243,343,443,543,643,743,1043,1143,1243... fastening seat portion; 43a, 443a, 543a, 743a... the 1st guide surface; 52,152,252,352,552,752,1152... plate main part; 52a... otch; 53,253,453,653,1253... tongue; 54,154,254,554,854,954,1154... fastening portion; 54a, 554a... the 2nd guide surface; 90,190... CD; 113... motor; 124... armature; 132g... through hole; 133... magnet; 138... aligning portion; 454,654,1254... fastening hole; 555... inner wall part; 748... coating portion in the hole; 756... fastening hole.
Embodiment
Below, with reference to accompanying drawing exemplary execution mode of the present invention is described.In addition, below, will be above-below direction along the direction setting of the central shaft of motor, CD is set at the top with respect to the side that rotating platform disposed, shape, the position relation of each one described.But, be to define above-below direction for the convenience that illustrates herein, be not the attitude when limiting the use of motor involved in the present invention and optical disc apparatus.
＜1. motor that execution mode is related 〉
Fig. 1 is the partial, longitudinal cross-sectional of the related motor of an embodiment of the invention 113.As shown in Figure 1, motor 113 possesses stationary part 102 and rotating part 103.Rotating part 103 is supported to can be with respect to stationary part 102 rotations.Stationary part 102 has the armature 124 that produces magnetic flux.Rotating part 103 has: rotor holder 132, magnet 113, aligning portion 138, rotating platform 141, groove portion 142, inaccessible plate 135 and a plurality of spheroid 136.
Comprise the resin component 134 of rotating platform 141 and groove portion 142 and the formed body 140 that rotor holder 132 is shaped to one.And then, be formed with a plurality of through hole 132g at formed body 140.A plurality of through hole 132g are arranging along Zhou Fangxiang by the position of radially inner side than groove portion 142.
In this motor 113, make fastening portion 154 and 143 fastenings of fastening seat portion by this way.Thus, groove portion 142 is fixed easily and securely with inaccessible plate 135.Fastening seat portion 143 is configured in overlooks when observing and through hole 132g position overlapped.Therefore, during moulding, can utilize mould that fastening seat portion 143 is carried out moulding.Therefore, can obtain the shape of fastening seat portion 143 accurately.
In addition, and nonessentially make fastening seat portion 143 and 154 fastenings of fastening portion.For example, also can make plate main part 152 fastenings of inaccessible plate 135 in fastening seat portion 143.And, fastening portion 154 fastenings that also can make inaccessible plate 135 in the surface of formed body 140, with the face of the opposite side of unlimited direction of groove portion 142.That is, if a part that makes the part of formed body 140 and inaccessible plate 135 in axially fastening.
And, also groove portion 142 can be formed the annular groove shape that opens wide towards the top, inaccessible plate 135 is inaccessible groove portion 142 from the top.
＜2. execution mode more specifically 〉
The structure of＜2-1. optical disc apparatus 〉
Then, execution mode more specifically of the present invention is described.
Fig. 2 is the longitudinal section of optical disc apparatus 1.Optical disc apparatus 1 is to make CD 90 (following only be designated as " CD 90 ") rotation, and carries out the device of " reading " and " writing " of information with respect to CD 90.Optical disc apparatus 1 possesses: device case 11, optical disc tray 12, brushless motor 13, clamper 14 and access portion 15.
Device case 11 is that optical disc tray 12, brushless motor 13, clamper 14 and access portion 15 are accommodated in inner framework.Optical disc tray 12 is the mechanisms that are used for carrying CD 90 between the outside of device case 11 and inside.Brushless motor 13 is fixed in the frame (chassis) 16 of the inside that is arranged on device case 11.CD 90 is transferred load to brushless motor 13 from optical disc tray 12.And then CD 90 is maintained between the rotating part 3 and clamper 14 of brushless motor 13.Then, CD 90 is the center rotation by brushless motor 13 with central shaft 9.
The structure of＜2-2. brushless motor 〉
Then, the structure to above-mentioned brushless motor 13 describes.
Fig. 3 is the longitudinal section of brushless motor 13.As shown in Figure 3, brushless motor 13 possesses stationary part 2 and rotating part 3.Stationary part 2 is fixed in the frame 16 of optical disc apparatus 1.Rotating part 3 is supported to can be with respect to stationary part 2 rotations.
Stationary axle bearing unit 22 is the mechanisms of axle 31 being supported with the state that can rotate.Stationary axle bearing unit 22 has lining (sleeve) 22a and lining housing 22b.Lining 22a is the parts roughly cylindraceous that surround the outer peripheral face of axle 33.Lining housing 22b is the parts of cup-shaped roughly, and lining 22a is remained on inside.Lining housing 22b is fixed in base component 21.And lining housing 22b is formed by magnetics such as galvanized steel plain sheet, tin plates.
When giving drive current, produce magnetic flux at a plurality of tooth 25a of portion of stator core 25 to coil 26.And then, by the effect of the magnetic flux between 25a of tooth portion and the rotor magnet described later 33, produce the torque of Zhou Fangxiang.As a result, rotating part 3 is the center rotation with respect to stationary part 2 with central shaft 9.The CD 90 that is held in rotating part 3 is the center rotation with rotating part 3 with central part 9.
Fig. 4 is the partial, longitudinal cross-sectional of rotating part 3.Fig. 5 is a plane graph of only observing rotor holder 32, resin component 34 and inaccessible plate 35 rotating part 3 from upper surface side.Fig. 3 is equivalent to the cross section of the III-III line in Fig. 5.And Fig. 6 is the vertical view of rotor holder 32.Below, with Fig. 3, also suitably with reference to Fig. 4～Fig. 6.
Upper cover part 32f is radially expansion above armature unit 24, and is made of inboard flat part 32b, rake 32c and outside flat part 32d.And cylindrical portion 32e is position roughly cylindraceous, and extends towards the below from the end edge portion of the radial outside of outside flat part 32d.Cylindrical portion 32e and central shaft 9 dispose coaxially.
Be formed with a plurality of the 1st through hole 32g and a plurality of the 2nd through hole 32h at the upper cover part 32f of rotor holder 32.As extremely shown in Figure 6 from Fig. 3, the 1st through hole 32g connects rake 32c vertically at the radially inner side of groove portion 43 described later.And as Fig. 3 and shown in Figure 6, the 2nd through hole 32h connects upper cover part 32f from rake 32c vertically to outside flat part 32d.
In the present embodiment, a plurality of the 1st through hole 32g and a plurality of the 2nd through hole 32h equally spaced arrange along Zhou Fangxiang respectively.By forming this configuration, can suppress the deflection of the center of gravity of rotor holder 32.But a plurality of the 1st through hole 32g and a plurality of the 2nd through hole 32h are also nonessential equally spaced to be arranged along Zhou Fangxiang.
Resin component 34 is the parts that constitute with molding resins such as Merlon.Rotor holder 32 and resin component 34 constitutes by insert moulding and integrated formed body 40.As extremely shown in Figure 5 from Fig. 3, resin component 34 has: rotating platform 41, groove portion 42, fastening seat portion 43, cone support 44 and coating portion 45.
Rotating platform 41 is configured in the upside of upper cover part 32f and the radial outside of cone 38.The lower surface of rotating platform 41 contacts with the upper surface of outside flat part 32d and the upper end of cylindrical portion 32e.Stretch out towards radial outside than the cylindrical portion 32e of rotor holder 32 end of the radial outside of rotating platform 41.
Upper surface at rotating platform 41 is fixed with circular CD mounting parts 41a.CD mounting parts 41 upper surfaces become the mounting surface for CD 90 mountings.That is, in the present embodiment, rotating platform 41 supports the lower surface of CD 90 indirectly through CD mounting parts 41a.In addition, rotating platform 41 also can and without CD mounting parts 41a directly the lower surface to CD 90 support.
By top plate portion 42a, outside wall portions 42b and inner wall part 42c, groove portion 42 forms the annular groove shape that opens wide towards the below.And then, circular inaccessible plate 35 is installed in the bottom of groove portion 42.Inaccessible plate 35 is inaccessible groove portion 42 from the below.Inaccessible plate 35 is for example formed by metallic plates such as galvanized steel plain sheet, tin plates.But the material of inaccessible plate 35 is not limited to metallic plate, also can form by the injection-molded moulding of using resin material.
In the circular space that is surrounded by groove portion 42 and inaccessible plate 35, dispose a plurality of spheroids 36 in the mode of rolling freely along Zhou Fangxiang.A plurality of spheroids 36 are positioned on the slip-proofing device 51 of the upper surface that is installed on inaccessible plate 35.In addition, slip-proofing device 51 also can be the parts that the vibration that is caused by spheroid 36 is absorbed.And then the inner peripheral surface of outside wall portions 42b is configured in the radial outside of a plurality of spheroids 36.And the outer peripheral face of inner wall part 42c is configured in the radially inner side of a plurality of spheroids 36.
The effect that a plurality of spheroid 36 performances are revised with respect to the offset of central shaft 9 center of gravity as a whole that comprises rotating part 3 and CD 90.When 90 rotations of rotating part 3 and CD and its rotating speed when to be certain rotating speed above, a plurality of spheroids 36 roll towards the direction opposite with center of gravity with respect to central shaft 9 and move.Thus, so that the position of the center of gravity as a whole of rotating part 3 and CD 90 adjust near the mode of central shaft 9.
And in the present embodiment, groove portion 42 is configured in the downside of upper cover part 32f of rotor holder 32 and the radially inner side of cylindrical portion 32e.That is, in the present embodiment, groove portion 42 is incorporated in the inside of rotor holder 32.Therefore, compare, can suppress the noise that the rolling because of spheroid 36 produces and propagate towards the outside with the situation that groove portion 42 is exposed in the outside of rotor holder 32.
Fig. 7 is the stereogram of inaccessible plate 35.As shown in Figure 7, inaccessible plate 35 has: plate main part 52, a plurality of tongue 53 and the fastening portion 54 that is formed at the upper end of each tongue 53.Plate main part 52 is circular positions of inaccessible groove portion 42.A plurality of tongues 53 end edge portion of the radially inner side of slave plate main part 52 respectively extend towards the top.A plurality of tongue 53 is equally spaced arranged along Zhou Fangxiang.And fastening portion 54 is outstanding towards radially inner side from the upper end of each tongue 53.
When inaccessible plate 35 is fixed in formed body 40, make the lower surface of inaccessible plate 35 near formed body 40.And then, fastening portion 54 and tongue 53 are inserted in the 1st through hole 32g.Be inserted in the 1st through hole 32g by fastening portion 54 and tongue 53, suppress the offset of the Zhou Fangxiang of inaccessible plate 35.And then, by making fastening portion 54 and 43 fastenings of fastening seat portion, inaccessible plate 35 is fixed in formed body 40.Like this, in the present embodiment, make the part of formed body 40 and a part of fastening of inaccessible plate 35.Thus, can fix formed body 40 and inaccessible plate 35 easily and securely.
As shown in Figure 4, the lower surface of fastening seat portion 43 becomes the 1st guide surface 43a.The 1st guide surface 43a is along with from the base end part of fastening seat portion 43 trend leading section and square neck is oblique up.On the other hand, the upper surface of fastening portion 54 becomes the 2nd guide surface 54a.Square neck is oblique down along with the trend radially inner side for the 2nd guide surface 54a.When fastening portion 54 and tongue 53 insertions the 1st through hole 32g, the 1st guide surface 43a and the mutual butt of the 2nd guide surface 54a.And then fastening portion 54 and tongue 53 are guided towards the top on one side towards the radial outside deflection on one side.Therefore, if inaccessible plate 35 is pressed into towards the top, then can easily make fastening portion 54 and 43 fastenings of fastening seat portion.
The inaccessible plate 35 of present embodiment has the tongue 53 that extends vertically between plate main part 52 and fastening portion 54.Therefore, when making the 1st guide surface 43a and the 2nd guide surface 54a butt, can mainly make tongue 53 deflections.As a result, can suppress the distortion of plate main part 52.And, as shown in Figure 7, in the present embodiment, in the inner peripheral surface of plate main part 52, be formed with otch 52a with the part of the base end part adjacency of tongue 53.Thus, the flexible raising of tongue 53.As a result, can further suppress to be accompanied by the distortion of the plate main part 2 of fastening.
And as shown in Figure 4, the fastening seat portion 43 of present embodiment is configured in the position of more leaning on the top than the lower surface of upper cover part 32f.And then tongue 53 extends to the height and position of the upper surface of this fastening seat portion 43.That is, fastening portion 54 slave plate main parts 52 towards the top away from.Thus, further suppress the distortion of plate main part 52.
In addition,, can as present embodiment, above fastening portion 54 and fastening seat portion 43, all be formed with guide surface, also can be only be formed with guide surface a certain side of fastening portion 54 and fastening seat portion 43 for guide surface.
In the present embodiment, the 1st through hole 32g definition moulding is formed in the through hole of rotor holder 32.But, also can form, at the upside of the 1st through hole 32g, resin component 34 is opening also.That is, formed body 40 is made of rotor holder 32 and resin component 34, and has the through hole that comprises the 1st through hole 32g.And then fastening seat portion 43 is outstanding towards the inside of this through hole of formed body 40.When carrying out insert moulding, can utilize mould that fastening seat portion 43 is carried out moulding.Carried out accurately machined mould accurately if use, then can make the machining accuracy height of the shape of fastening seat portion 43.
And, in the present embodiment, be formed with annular recessed portion 32i in the lower face side of the upper cover part 32f of rotor holder 32.And then annular recessed portion 32i is formed by rake 32c, outside flat part 32d and cylindrical portion 32e.Further, annular recessed portion 32i opens wide towards the below.And then groove portion 42 is configured in this annular recessed portion 32i.Thus, make the upper cover part 32f of the interior perimembranous of inaccessible plate 35 and rotor holder 32 approaching, form and make inaccessible plate 35 fastenings easily in the shape of formed body 40.
Above cone support 43, dispose yoke 37, cone 38 and pre-compressed spring 39.Yoke 37 be and clamper 14 (with reference to Fig. 2) between produce the magnetic of magnetic attraction.Yoke 37 is fixed in axle 31.CD 90 is clamped between CD mounting parts 41a and the clamper 14 by the magnetic attraction between yoke 37 and the clamper 14.
The interior perimembranous of 38 pairs of CDs 90 of cone supports.Cone 38 is the aligning parts on the central shaft 9 of being centrally located in CD 90.Cone 39 has the bearing-surface 38a that the interior perimembranous to CD 90 supports.And cone 38 can move up and down along axle 31.
In the present embodiment, axle 31 is pressed in rotor holder 32.When being pressed into, axle 31 is inserted by the downside from rotor holder 32.Therefore, when the amount of being pressed between rotor holder 32 and the axle 31 was big, the inner peripheral surface of rotor holder 32 was because of axle 31 plastic deformations.As a result, be formed with burr, the worry that exists this burr to fly out towards the top from the inner peripheral surface of rotor holder 32 at the inner peripheral surface of rotor holder 32.In the present embodiment, cone support 44 is configured in the upside of the inboard flat part 32b of rotor holder 32.Therefore, burr flew out from the inner peripheral surface of rotor holder 32 when promptly box lunch was pressed into, and this burr also is incorporated between cone support 44 and the axle 31.Therefore, can prevent flying out of Yin Maoci and give harmful effect moving up and down of cone 38.
In the present embodiment, cone 38, pre-compressed spring 39 and cone support 44 are configured in the radially inner side of rake 32c.On the other hand, groove portion 42 is configured in the radial outside of rake 32c.That is, the space that is used to dispose the space of cone 38, pre-compressed spring 39 and cone support 44 and is used to dispose groove portion 42 across rake 32c in arranged radially.The axial size that can suppress thus, brushless motor 13.
The manufacturing step of＜2-3. brushless motor 〉
Then, describe with reference to the flow chart of Fig. 8 a part the manufacturing process of above-mentioned brushless motor 13.Shown in Fig. 8, by insert moulding that rotor holder 32 and resin component 34 is integrated, then a plurality of spheroids 36 are configured in the groove portion 42, the step of inaccessible plate 35 then is installed.
As shown in Figure 8, at first, prepare rotor holder 32 and a pair of mould (step S1) made in advance.Rotor holder 32 is for example made by punch forming.Be formed with a plurality of the 1st through hole 32g and a plurality of the 2nd through hole 32h at the upper cover part 32f of rotor holder 32.A pair of mould forms die cavity in inside by making mutual opposed faces butt.Shape behind the shape of this die cavity and rotor holder 32 and resin component 34 integrated is corresponding.Prepare so a pair of mould.
Secondly, rotor holder 32 is placed in the inside of a side mould.Then, make the opposed faces of a pair of mould against each other, form die cavity in the inside of mould.Thus, become rotor holder 32 and be configured in the interior state (step S2) of die cavity.Then, make fusion resin flow in the die cavity (step S3).Fusion resin flow in the die cavity via the cast gate of the mould that is formed at least one side.
When fusion resin when spreading all in the die cavity, then, make the resin cooling in the die cavity and solidify (step S4).Resin in the die cavity becomes resin component 34 by curing.At this moment, rotating platform 41, groove portion 42, fastening seat portion 43, cone support 44 and coating portion 45 form the part of resin component 34 respectively.And, thus, obtain making rotor holder 32 and resin component 34 integrated formed body 40.Then, open a pair of mould, make formed body 40 from mold releasability (step S5).In addition, when making formed body 40, for example use stripper pin etc. from mold releasability.
Like this, in the present embodiment, make metal rotor holder 32 and resin component 34 integrated by insert moulding.Therefore, with by be pressed into, bonding agent compares to the two situation of fixing, can firmly fix rotor holder 32 and resin component 34.And, carried out accurately machined mould accurately if use, can carry out fine finishining with high axiality to groove portion 42 with respect to central shaft 9.And, carried out accurately machined mould accurately if use, also can suppress the inclination of groove portion 42 with respect to rotor holder 32.
Then, be disposed at groove portion 42 (step S6) through a plurality of spheroids 36.Herein, a plurality of spheroids 36 are configured in the inside of the groove portion 42 of the groove shape that is formed by top plate portion 42a, outside wall portions 42b and inner wall part 42c.
Behind a plurality of spheroids 36 of configuration, secondly, inaccessible plate 35 is installed on formed body 40 (step S7).That is, make the lower surface of inaccessible plate 35, and fastening portion 54 and tongue 53 are inserted in the 1st through hole 32g near formed body 40.Then, by making fastening portion 54 and 43 fastenings of fastening seat portion, inaccessible plate 35 is fixed in formed body 40.
＜3. variation 〉
More than exemplary execution mode of the present invention is illustrated, still, the present invention is not limited to above-mentioned execution mode.Below, at various variation, be that the center describes with difference with above-mentioned execution mode.
Fig. 9 is the figure that a variation in a plurality of variation is shown, and is called the 1st variation herein.Fig. 9 is the partial, longitudinal cross-sectional of the related rotating part of the 1st variation 203.In example shown in Figure 9, fastening seat portion 243 is configured in the inside of the 1st through hole 232g.Like this, because the fastening portion 254 of inaccessible plate 235 is configured in the position nearer apart from plate main part 252, therefore, can shorten the length of tongue 253.Therefore, can easily make inaccessible plate 235.
Figure 10 is the figure that a variation in a plurality of variation is shown, and is called the 2nd variation herein.Figure 10 is the partial, longitudinal cross-sectional of the related rotating part of the 2nd variation 303.In the example of Figure 10, fastening seat portion 343 is configured in the position of more leaning on downside than the upper cover part 332f of rotor holder 332.And in example shown in Figure 10, the interior perimembranous fastening that makes plate main part 352 is in fastening seat portion 343.Like this, need not tongue 53 and fastening portion 54 as above-mentioned execution mode to be set at inaccessible plate 335.Therefore, can more easily make inaccessible plate 335.
Figure 11 is the figure that a variation in a plurality of variation is shown, and is called the 3rd variation herein.Figure 11 is the partial, longitudinal cross-sectional that the related rotating part of the 3rd variation 403 is shown.And Figure 12 is the stereogram of the related inaccessible plate 435 that is installed on rotating part 403 of the 3rd variation.In Figure 11 and example shown in Figure 12, inaccessible plate 435 does not have the fastening portion 54 as above-mentioned execution mode.In Figure 11 and example shown in Figure 12, inaccessible plate 435 has the fastening hole 454 that radially connects tongue 453.Overlook when observing, fastening hole 454 is local at least overlapping with fastening seat portion 443.In addition, fastening hole 454 and nonessential perforation tongue 453.That is, fastening hole 454 also can be the recess that opens wide towards fastening seat portion 443 1 sides.
In this embodiment, fastening seat portion 443 is inserted in the fastening hole 454 of inaccessible plate 435, thus, and tongue 453 and 443 fastenings of fastening seat portion.When tongue 453 when the 1st through hole 432g inserts, the mutual butt in upper end of the 1st guide surface 443a and tongue 453.And then tongue 453 is towards the radial outside deflection, and quilt is guided towards the top.Therefore, if inaccessible plate 435 is pressed into towards the top, then can easily make fastening hole 454 and 443 fastenings of fastening seat portion.
And in example shown in Figure 11, fastening seat portion 443 is inserted in the fastening hole 454 of inaccessible plate 435.Thus, can further suppress of the offset of inaccessible plate 435 with respect to the Zhou Fangxiang of formed body 440.In addition, even if be that fastening seat portion 443 also is inserted in recess under the situation of the recess that opens wide towards fastening support 443 sides in fastening hole 454.Thus, can further suppress the offset with respect to the Zhou Fangxiang of formed body 440 of inaccessible plate 435.
Figure 13 is the figure that a variation in a plurality of variation is shown, and is called the 4th variation herein.Figure 13 is the partial, longitudinal cross-sectional of the related rotating part of the 4th variation 503.In example shown in Figure 13, groove portion 542 has top plate portion 542a and outside wall portions 542b.Different with above-mentioned structure, inner wall part 555 does not become the part of groove portion 542.In Figure 13, inner wall part 555 becomes the part of inaccessible plate 535.The end edge portion of the radially inner side of inner wall part 555 slave plate main parts 552 is cylindricly towards the top and extends.In this embodiment, also can utilize groove portion 542 and inaccessible plate 535 to form the circular space of rolling for a plurality of spheroids 536.And, in Figure 13, at resin component to be formed with the arm 546 that extends vertically with fastening portion 554 opposed modes.Be formed with fastening seat portion 543 in the end of arm 546.
In example shown in Figure 13, fastening portion 554 is outstanding towards radially inner side from the inner peripheral surface of inner wall part 555.Overlook when observing, fastening portion 554 is local at least overlapping with fastening seat portion 543.On the other hand, fastening seat portion 543 extends towards the below of the 1st through hole 532g via arm 546.Guarantee to allow the space 547 of the deflection of arm 546 at the radially inner side of fastening seat portion 543.When inaccessible plate 535 is installed, make the 1st guide surface 543a of fastening seat portion 543 and the 2nd guide surface 554a butt of fastening portion 554, can make arm 546 towards the radially inner side deflection.Therefore, if inaccessible plate 535 is pressed into towards the top, then can easily make fastening portion 554 and 543 fastenings of fastening seat portion.
Figure 14 is the figure that a variation in a plurality of variation is shown, and is called the 5th variation herein.Figure 14 is the partial, longitudinal cross-sectional of the related rotating part of the 5th variation 603.In example shown in Figure 14, fastening seat portion 643 is outstanding towards radially inner side from the inner peripheral surface of the inner wall part 642c of groove portion 642.Like this, fastening seat portion 643 is configured in the position near groove portion 642.Therefore, inaccessible plate 635 can be fixed in groove portion 642 more firmly.And in example shown in Figure 14, the inner peripheral surface of inner wall part 642c is positioned at the position of more leaning on radially inner side than the end of the radial outside of the 1st through hole 632g.In other words, a part of stipulating the inner peripheral surface of the 1st through hole 632g is covered by inner wall part 642c.Therefore, when carrying out insert moulding, can utilize mould that fastening seat portion 643 is carried out moulding.In addition, also can be provided with the position or the planar portions of fillet in fastening seat portion 643.
And in example shown in Figure 14, inaccessible plate 635 has fastening hole 654.Fastening hole 654 radially connects tongue 653.And then fastening seat portion 643 is inserted in the fastening hole 654 of inaccessible plate 635.Therefore, can further suppress of the offset of inaccessible plate 635 with respect to the Zhou Fangxiang of formed body 640.
Figure 15 is the figure that a variation in a plurality of variation is shown, and is called the 6th variation herein.Figure 15 is the partial, longitudinal cross-sectional of the related rotating part of the 6th variation 703.In example shown in Figure 15, fastening seat portion 743 is outstanding towards radially inner side from the bottom of the inner wall part 742c of groove portion 742.On the other hand, the plate main part 752 at inaccessible plate 735 is formed with fastening hole 756.Fastening hole 756 comprises the space of permission inner wall part 742c towards the radial outside deflection.For fastening hole 756, when inaccessible plate 735 is installed on fastening seat portion 743, makes the 1st guide surface 743a of fastening seat portion 743 and the upper surface butt of plate main part 752, thereby make inner wall part 742c towards the radial outside deflection.Therefore, if inaccessible plate 735 is pressed into towards the top, then can easily make plate main part 752 and 743 fastenings of fastening seat portion.
And in example shown in Figure 15, the medial surface of the 1st through hole 732g of rotor holder 732 is covered by resin.That is, resin component 734 has coating portion 748 in the hole, and coating portion 748 covers the face that surrounds the 1st through hole 732g in this hole.Therefore, when carrying out insert moulding, stipulate that the face of the 1st through hole 732g does not directly contact with mould.Therefore, the sliding contact between mould in the time of can suppressing the demoulding and the rotor holder 732.Thus, can suppress the wearing and tearing of mould.
Figure 16 is the figure that a variation in a plurality of variation is shown, and is called the 7th variation herein.Figure 16 is the partial, longitudinal cross-sectional of the related rotating part of the 7th variation 803.In example shown in Figure 16, resin component 834 does not have the fastening seat portion 43 as above-mentioned execution mode.Fastening portion 854 pass the 1st through hole 832g and fastening in the upper surface of resin component 834.
Figure 17 is the figure that a variation in a plurality of variation is shown, and is called the 8th variation herein.Figure 17 is the partial, longitudinal cross-sectional of the related rotating part of the 8th variation 903.In example shown in Figure 17, resin component 934 does not have the fastening seat portion 43 as above-mentioned execution mode yet.Fastening portion 934 pass the 1st through hole 932g and fastening in the upper surface of the upper cover part 932f of rotor holder 932.
In Figure 16, example shown in Figure 17, the fastening of fastening portion is in the upper surface of formed body.The face of institute of fastening portion fastening so long as the face of a side in the surface of formed body, opposite with the direction of opening wide of groove portion get final product.
Figure 18 is the figure that a variation in a plurality of variation is shown, and is called the 9th variation herein.Figure 18 is the partial, longitudinal cross-sectional of the related rotating part of the 9th variation 1003.In example shown in Figure 180, the upper cover part 1032f of rotor holder 1032 does not have the inclined plane.The upper cover part 1032f of rotor holder 1032 radially is being the expansion of tabular ground.And then, be formed with the 1st through hole 1032g at this upper cover part 1032f.Be formed with the arm that extends below axially at resin component.Fastening seat portion 1043 extends towards the below of the 1st through hole 1032g via arm 1046.
Figure 19 is the figure that a variation in a plurality of variation is shown, and is called the 10th variation herein.Figure 19 is the partial sectional view of the related brushless motor of the 10th variation 1113.In example shown in Figure 19, rotor holder 1132 does not have fastening part and upper cover part.That is, in example shown in Figure 19, the integral body of rotor holder 1132 all is positioned at the position of more leaning on radial outside than groove portion 1142.Like this, if get rid of fastening part and upper cover part, can make rotor holder 1132 lightweights.
But,, preferably as above-mentioned execution mode, be provided with upper cover part 32f at rotor holder 32 in order to improve the rigidity of rotating part.And,, preferably as above-mentioned execution mode, be provided with fastening part 32a at rotor holder 32 in order to improve the constant intensity of rotor holder with respect to axle.
In example shown in Figure 19, the 1st through hole 1132g is arranged at resin component 1134.And fastening seat portion 1143 tab-like being formed in are overlooked when observing and the 1st through hole 1132g position overlapped.And then fastening portion 1154 fastenings of inaccessible plate 1135 are in fastening seat portion 1143.In other words, fastening portion 1154 and fastening seat portion 1143 are axially opposed.
And in example shown in Figure 19, inaccessible plate 1135 has interior perimembranous 1157.Interior perimembranous 1157 is expanded towards the radially inner side of plate main part 1152, and is positioned at the top of precompressed magnet 1123.And then, produce axial magnetic attraction in making between perimembranous 1157 and the precompressed magnet 1123.
Figure 20 is the figure that a variation in a plurality of variation is shown, and is called the 11st variation herein.Figure 20 is the partial, longitudinal cross-sectional of the related rotating part of the 11st variation 1203.In example shown in Figure 20, groove portion 1242 is configured in the upside of the upper cover part 1232f of rotor holder 1232.Groove portion 1242 has: bottom 1242a, outside wall portions 1242b and inner wall part 1242c.
Bottom 1242a is circular position, and contacts with the upper surface of upper cover part 1232f.Outside wall portions 1242b is position cylindraceous, and extends towards the top from the end edge portion of the radial outside of bottom 1242a.Inner wall part 1242c is position cylindraceous, and extends towards the top from the end edge portion of the radially inner side of bottom 1242a.That is, in Figure 20, groove portion 1242 forms the annular groove shape that opens wide towards the top.And then the top of groove portion 1242 is by inaccessible plate 1235 obturations.
In example shown in Figure 20, fastening seat portion 1243 is outstanding towards radially inner side from the inner peripheral surface of inner wall part 1242c.On the other hand, inaccessible plate 1235 has tongue 1253.The end edge portion of the radially inner side of tongue 1253 slave plate main parts 1252 extends towards the below.Fastening hole 1254 is formed at tongue 1253.And then, be inserted in fastening hole 1254 by fastening seat portion 1243, tongue 1253 and 1243 fastenings of fastening seat portion.
For motor of the present invention, can as above-mentioned execution mode, variation the parts that are used to make the CD rotation, also can be to be used to make other the parts of rotations such as indicator, colour wheel, polygonal mirror such as disk.
And in the above-described embodiment, cone 38 forms the structure that can move up and down along axle 31.But as long as can carry out the aligning of CD 90, cone 38 can not move up and down along axle yet.
And, also can in the scope that does not produce contradiction, suitably make up the key element that in above-mentioned execution mode, variation, occurs.
Utilize possibility on the industry
The present invention can be used in motor and optical disc apparatus.
Claims (43)
1. the motor that disc drives is used is characterized in that,
The motor that described disc drives is used possesses:
Stationary part; And
Rotating part, this rotating part are supported to and can rotate with respect to described stationary part,
Described stationary part has the armature that produces magnetic flux,
Described rotating part has:
Metal rotor holder, this rotor holder have the cylindrical portion with the spigot shaft coaxle ground configuration of extending up and down;
Rotating platform, this rotating platform contacts with the upper end of described cylindrical portion, and directly or indirectly CD is supported from lower face side;
Aligning portion, this aligning portion supports the interior perimembranous of CD;
The groove portion of annular groove shape, this groove portion towards the top or the below open wide;
Inaccessible plate, the inaccessible described groove portion of this obturation plate;
A plurality of spheroids, described a plurality of spheroids are disposed at the circular space that is surrounded by described groove portion and described inaccessible plate in the mode of rolling freely along Zhou Fangxiang; And
Magnet, this magnet configuration is at the inner peripheral surface of described cylindrical portion, and with described armature at diametrically contraposition,
Resin component comprises described groove portion and described rotating platform, and this resin component and described rotor holder are shaped to the formed body of one,
Described formed body more has a plurality of through holes of arranging along Zhou Fangxiang by the position of radially inner side than described groove portion,
Described resin component has fastening seat portion, and this fastening seat portion projects to overlooks when observing and described through hole position overlapped,
Described inaccessible integrated circuit board is due to described fastening seat portion.
2. motor according to claim 1 is characterized in that,
Described inaccessible plate has:
Circular plate main part;
A plurality of tongues, described a plurality of tongues extend vertically from described plate main part; And
Fastening portion, this fastening portion from described tongue towards radially outstanding, and overlapping when overlooking when observing local and described at least fastening seat portion,
The fastening of described fastening portion is in described fastening seat portion.
3. motor according to claim 2 is characterized in that,
Described rotor holder also has upper cover part, and this upper cover part is expanded towards radially inner side from the upper end of described cylindrical portion,
Described groove portion is configured in the downside of described upper cover part and the inboard of described cylindrical portion,
Described fastening seat portion is configured in than the lower surface of described upper cover part more by the position of top.
4. motor according to claim 3 is characterized in that,
Described fastening seat portion is configured in the inside of described through hole.
5. motor according to claim 1 is characterized in that,
Described inaccessible plate has:
Circular plate main part;
A plurality of tongues, described a plurality of tongues extend vertically from described plate main part; And
The fastening hole, this fastening hole radially connects described tongue, and overlapping when overlooking when observing local and described at least fastening seat portion,
Described fastening seat portion is inserted in described fastening hole, thus described tongue and the fastening of described fastening seat portion.
6. according to each described motor in the claim 2 to 5, it is characterized in that,
Described inaccessible plate in the inner peripheral surface of described plate main part, have otch with the part of the base end part adjacency of described tongue.
7. motor according to claim 1 is characterized in that,
Described inaccessible plate has:
Circular plate main part;
A plurality of tongues, described a plurality of tongues extend vertically from described plate main part; And
Recess, this recess at described tongue forming in the mode that radially becomes depression, and overlapping when overlooking when observing local and described at least fastening seat portion,
Described fastening seat portion is inserted in described recess, thus described tongue and the fastening of described fastening seat portion.
8. motor according to claim 1 is characterized in that,
Described inaccessible plate has:
Circular plate main part;
Inner wall part cylindraceous, this inner wall part extends vertically from described plate main part, and from the inaccessible described groove portion of radially inner side; And
Fastening portion, this fastening portion are outstanding from described inner wall part towards radially inner side, and overlapping when overlooking when observing local and described at least fastening seat portion,
The fastening of described fastening portion is in described fastening seat portion.
9. motor according to claim 8 is characterized in that,
Be formed with arm at described resin component, this arm to be extending vertically with described fastening portion opposed mode,
Fastening seat portion is formed at the end of described arm.
10. motor according to claim 1 is characterized in that,
Described groove portion has inner wall part cylindraceous, and this inner wall part is towards the radially inner side expansion of described spheroid.
11. motor according to claim 10 is characterized in that,
Described inner wall part inner peripheral surface is positioned at the position of more leaning on radially inner side than the end of the radial outside of described through hole,
Described fastening seat portion is outstanding towards radially inner side from the inner peripheral surface of described inner wall part.
12. motor according to claim 11 is characterized in that,
Described inaccessible plate has:
Circular plate main part;
A plurality of tongues, described a plurality of tongues extend vertically from described plate main part; And
The fastening hole, this fastening hole radially connects described tongue, and overlapping when overlooking when observing local and described at least fastening seat portion,
Described fastening seat portion is inserted in described fastening hole, thus described tongue and the fastening of described fastening seat portion.
13. motor according to claim 10 is characterized in that,
Described inaccessible plate has circular plate main part,
Described fastening seat portion is outstanding towards radially inner side from the bottom of the described inner wall part of described groove portion,
Be formed with the fastening hole at described plate main part,
Described fastening hole comprises the space of the described inner wall part of permission towards the radial outside deflection.
14. according to each described motor in the claim 1,2,4,10, it is characterized in that,
Described fastening seat portion has the 1st guide surface, and the 1st guide surface is to the described inaccessible plate channeling conduct before the fastening.
15. motor according to claim 9 is characterized in that,
The lower surface of described fastening seat portion is along with from the base end part trend leading section of described fastening seat portion and square neck is oblique up.
16. according to claim 2,3 or 8 described motor, it is characterized in that,
Described fastening portion has the 2nd guide surface, and the 2nd guide surface is to the described fastening seat portion channeling conduct before the fastening.
17. motor according to claim 15 is characterized in that,
Square neck is oblique down along with the trend radial outside for the upper surface of described fastening portion.
18. motor according to claim 1 is characterized in that,
Described rotor holder also has upper cover part, and this upper cover part is expanded towards radially inner side from the upper end of described cylindrical portion,
Described resin component has coating portion in the hole, and coating portion coats the face of the described through hole that surrounds described rotor holder in this hole.
19. motor according to claim 1 is characterized in that,
Described groove portion has inner wall part cylindraceous, and this inner wall part is expanded towards the radially inner side of described spheroid,
Described inaccessible plate has circular plate main part,
The end face of the radially inner side of described plate main part is positioned at than described madial wall position more in the inner part.
20. motor according to claim 1 is characterized in that,
Described rotor holder possesses upper cover part, and this upper cover part is expanded towards radially inner side from the upper end of described cylindrical portion,
Described upper cover part possesses:
Fastening part cylindraceous, described axle are pressed into and are anchored on this fastening part;
Inboard flat part, this inboard flat part are the positions of the expansion from described fastening part towards radial outside;
Rake, this rake increases towards radial outside from the end edge portion of the radial outside of described inboard flat part; And
Outside flat part, this outside flat part are between described rake and described cylindrical portion, and radially expansion.
21. motor according to claim 20 is characterized in that,
Be formed with the cone support at the upside of described inboard flat part and the radially inner side of described rake,
When described axle is pressed into inner peripheral surface in described rotor holder, be formed with burr at the inner peripheral surface of described rotor holder,
Described burr is incorporated between described cone support and the described axle.
22. motor according to claim 20 is characterized in that,
Be formed with the cone support at the upside of described inboard flat part and the radially inner side of described rake,
Above described cone support, dispose cone,
Described cone can move up and down along described axle.
23. motor according to claim 20 is characterized in that,
Be formed with the cone support at the upside of described inboard flat part and the radially inner side of described rake,
Above described cone support, dispose cone and pre-compressed spring,
Described pre-compressed spring folder is inserted between described cone and the described cone support.
24. motor according to claim 23 is characterized in that,
The upper end of described pre-compressed spring is connected to the lower surface of described cone,
The bottom of described pre-compressed spring is connected to the upper surface of described cone support.
25. motor according to claim 20 is characterized in that,
Be formed with the cone support at the upside of described inboard flat part and the radially inner side of described rake,
Above described cone support, dispose cone and pre-compressed spring,
The space that is used to dispose described cone, described pre-compressed spring and described cone support with the space that is used to dispose described groove portion across described rake in arranged radially.
26. motor according to claim 1 is characterized in that,
Described inaccessible plate has circular plate main part,
Described rotor holder has upper cover part, and this upper cover part is expanded towards radially inner side from the upper end of described cylindrical portion,
Described fastening seat portion is configured in than described upper cover part more by the position of downside,
The interior perimembranous fastening that makes described plate main part is in described fastening seat portion.
27. motor according to claim 20 is characterized in that,
Be formed with the cone support at the upside of described inboard flat part and the radially inner side of described rake,
Above described cone support, dispose yoke,
Described yoke is fixed in described axle.
28. motor according to claim 1 is characterized in that,
Upper surface at described rotating platform disposes circular CD mounting parts,
Described CD is clamped between described CD mounting parts and the described clamper by the magnetic attraction between described yoke and the clamper.
29. the motor that disc drives is used is characterized in that,
The motor that described disc drives is used possesses:
Stationary part; And
Rotating part, this rotating part are supported to and can rotate with respect to described stationary part,
Described stationary part has the armature that produces magnetic flux,
Described rotating part has:
Metal rotor holder, this rotor holder have the cylindrical portion with the spigot shaft coaxle ground configuration of extending up and down;
Rotating platform, this rotating platform contacts with the upper end of described cylindrical portion, and directly or indirectly CD is supported from lower face side;
Aligning portion, this aligning portion supports the interior perimembranous of CD;
The groove portion of annular groove shape, this groove portion towards the top or the below open wide;
Inaccessible plate, the inaccessible described groove portion of this obturation plate;
A plurality of spheroids, described a plurality of spheroids are disposed at the circular space that is surrounded by described groove portion and described inaccessible plate in the mode of rolling freely along Zhou Fangxiang; And
Magnet, this magnet configuration is at the inner peripheral surface of described cylindrical portion, and with described armature at diametrically contraposition,
Resin component comprises described groove portion and described rotating platform, and this resin component and described rotor holder are shaped to the formed body of one,
Described formed body more has a plurality of through holes of arranging along Zhou Fangxiang by the position of radially inner side than described groove portion,
Described inaccessible plate has:
Circular plate main part; And
A plurality of fastening portion, described a plurality of fastening portion extends from described plate main part,
The face of described through hole fastening in the opposite side of direction of opening wide described formed body and described groove portion passes in described fastening portion.
30. the motor that disc drives according to claim 29 is used is characterized in that,
Described through hole fastening is passed in the upper surface of described resin component by described fastening portion.
31. the motor that disc drives according to claim 29 is used is characterized in that,
Described rotor holder also has upper cover part, and this upper cover part is expanded towards radially inner side from the upper end of described cylindrical portion,
Described through hole fastening is passed in the upper surface of described upper cover part by described fastening portion.
32. according to each described motor in the claim 1,2,4,8,10,18 or 29, it is characterized in that,
Described groove portion is configured in the downside of described upper cover part and the radially inner side of described cylindrical portion.
33. motor according to claim 32 is characterized in that,
Described rotor holder also has upper cover part, and this upper cover part is expanded towards radially inner side from the upper end of described cylindrical portion,
Described upper cover part has the rake of step-down along with the trend radially inner side,
Described groove portion is configured in the annular recessed portion between described rake of being formed at of described rotor holder and the described cylindrical portion.
34. motor according to claim 32 is characterized in that,
Described rotor holder also has upper cover part, and this upper cover part radially is being tabular,
Described through hole is formed at described upper cover part,
Be formed with the arm that extends below axially at described resin component,
Described fastening support extends towards the below of described through hole via arm.
35. motor according to claim 1 is characterized in that,
The integral body of described rotor holder is positioned at the position of more leaning on radial outside than described groove portion.
36. motor according to claim 35 is characterized in that,
Be provided with described through hole at described resin component,
In addition,, giving prominence to formation with described through hole position overlapped when observing and stating fastening seat portion to some extent when overlooking at described resin component,
Described inaccessible plate possesses:
Circular plate main part;
A plurality of tongues, described a plurality of tongues extend vertically from described plate main part; And
Fastening portion, this fastening portion is radially outstanding from described tongue, and overlapping when overlooking when observing local and described at least fastening seat portion,
The fastening of described fastening portion is in described fastening seat portion.
37. motor according to claim 36 is characterized in that,
Described stationary part possesses:
Lining, this lining supports described axle; And
The lining housing of cup-shaped, this lining housing remains on inside with described lining,
Be fixed with precompressed magnet in the upper end of described lining housing,
Described inaccessible plate has interior perimembranous, and perimembranous is expanded towards the radially inner side of described plate main part in this, and is positioned at the top of described precompressed magnet.
38. motor according to claim 1 is characterized in that,
Described rotor holder also has upper cover part,
Described groove portion is disposed at the upside of described upper cover part.
39. according to the described motor of claim 38, it is characterized in that,
Described groove portion is the annular groove shape that opens wide towards the top.
40. according to the described motor of claim 39, it is characterized in that,
Described groove portion possesses:
Bottom, this bottom are the circular positions that contacts with the upper surface of described upper cover part;
Outside wall portions, this outside wall portions are the positions cylindraceous of extending towards the top from the end edge portion of the radial outside of described bottom; And
Inner wall part, this inner wall part are the positions cylindraceous of extending towards the top from the end edge portion of the radially inner side of described bottom,
The top of described groove portion is by described inaccessible plate obturation.
41. according to the described motor of claim 40, it is characterized in that,
Described fastening seat portion is outstanding towards radially inner side from the inner peripheral surface of described inner wall part,
Described inaccessible plate has:
The plate main part;
Tongue, this tongue extends towards the below from the end edge portion of the radially inner side of described plate main part; And
Be formed at the fastening hole of described tongue,
Described fastening seat portion is inserted in described fastening hole, thus described tongue and the fastening of described fastening portion.
42. according to claim 1 or 29 described motor, it is characterized in that,
Precompressed magnet is fixed in the lower surface of described rotor holder.
43. an optical disc apparatus is characterized in that possessing:
Claim 1 or 29 described motor;
Access portion, this access portion the CD that described rotating part kept by described motor is carried out reading of information and write at least one side; And
Housing, this housing are taken in described motor and described access portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010136808A JP2012005214A (en) | 2010-06-16 | 2010-06-16 | Motor and disk drive |
| JP2010-136808 | 2010-06-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102290878A true CN102290878A (en) | 2011-12-21 |
| CN102290878B CN102290878B (en) | 2014-03-12 |
Family
ID=45337058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110168348.8A Expired - Fee Related CN102290878B (en) | 2010-06-16 | 2011-06-16 | Electromotor and disc driving device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2012005214A (en) |
| KR (1) | KR20110137255A (en) |
| CN (1) | CN102290878B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000014113A (en) * | 1998-06-18 | 2000-01-14 | Nippon Densan Corp | Driving motor for recording media |
| JP2000245116A (en) * | 1999-02-24 | 2000-09-08 | Nippon Densan Corp | Motor |
| CN1656551A (en) * | 2002-04-08 | 2005-08-17 | 美蓓亚株式会社 | Spindle motor |
| CN1739153A (en) * | 2003-01-16 | 2006-02-22 | 美蓓亚株式会社 | Turn table device manufacturing method and turn table device |
-
2010
- 2010-06-16 JP JP2010136808A patent/JP2012005214A/en not_active Withdrawn
-
2011
- 2011-06-15 KR KR1020110058052A patent/KR20110137255A/en active IP Right Grant
- 2011-06-16 CN CN201110168348.8A patent/CN102290878B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000014113A (en) * | 1998-06-18 | 2000-01-14 | Nippon Densan Corp | Driving motor for recording media |
| JP2000245116A (en) * | 1999-02-24 | 2000-09-08 | Nippon Densan Corp | Motor |
| CN1656551A (en) * | 2002-04-08 | 2005-08-17 | 美蓓亚株式会社 | Spindle motor |
| CN1739153A (en) * | 2003-01-16 | 2006-02-22 | 美蓓亚株式会社 | Turn table device manufacturing method and turn table device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102290878B (en) | 2014-03-12 |
| KR20110137255A (en) | 2011-12-22 |
| JP2012005214A (en) | 2012-01-05 |
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