CN101174780B - Brushless motor - Google Patents
Brushless motor Download PDFInfo
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- CN101174780B CN101174780B CN200710188746XA CN200710188746A CN101174780B CN 101174780 B CN101174780 B CN 101174780B CN 200710188746X A CN200710188746X A CN 200710188746XA CN 200710188746 A CN200710188746 A CN 200710188746A CN 101174780 B CN101174780 B CN 101174780B
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- bearing
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Abstract
An brushless motor, which use bearing and bearing shell rotatable support the axes of roter on the dish driving mchanism of motor panel of the stator, the character is that, the bearing shell mold as barrel-type which in the internal circumstance of the bearing, and support the butt end on the said motor panel; freely revolve support the end panel of axile of the said bearing, immediacy touch the motor panel or separate by the axial thrust baffle, so as to get axis supporting.
Description
Patent application of the present invention is that application number is 200510084461.2, the applying date be July 8 in 2005 day, be called the dividing an application of application for a patent for invention of " brushless motor ".
Technical field
The present invention relates to drive the brushless motor of the video disc rotation of CD (Compact Disc), DVD (Digital Versatile Disc), MD (MiniDisc) etc.
Background technology
So far, prevent the structure that comes off for preventing from that above-mentioned rotor comes off when impact waiting masterpiece that makes above the magnetic attracting force between rotor magnet and stator core to be used for motor, in brushless motor, add to have in the past.Prevent the structure that comes off as this, generally adopt the structure (reference, for example Japanese patent laid-open 10-23702 communique) that buckling parts is set, fall-out preventing component is set and both are fastened in the rotor portions relative on cartridge housing with cartridge housing.
In addition, also adopt and in the part of rotating shaft (axle) groove is set and makes fall-out preventing component and structure that this groove fastens etc.
Fig. 8 represents the structure of brushless motor in the past.As shown in Figure 8,21 expression rotary bodies (rotor), 22 expression rotating shafts (axle), 25 expression fall-out preventing components, 23 expression bearings, 24 expression cartridge housings, 26 expression buckling partss, 27 expression stator cores.Cartridge housing 24 is generally made through cut by metal, is provided with buckling parts 26 in the end.Fall-out preventing component 25 has elasticity.When the assembling brushless motor, rotating shaft 22 is inserted bearing 23, then the front end of fall-out preventing component 25 contacts with above-mentioned buckling parts 26.When further insertion rotating shaft 22, fall-out preventing component 25 is because of the external diameter direction expansion of elasticity to buckling parts 26.When further insertion rotating shaft 22, fall-out preventing component 25 relies on the profile of buckling parts 26 when the external diameter of its front end by buckling parts 26, reduces under elastic reaction and reverts to original shape.Therefore, the front end of fall-out preventing component 25 embeds buckling parts 26 and performance prevents the function that comes off.
For the video disc drive unit, present situation is that requirement realizes slimming, miniaturization, keep structure at the bearing that is used for the brushless motor aspect these, except as above-mentioned brushless motor in the past metal cutting processing components such as brass being used as the cartridge housing as the bearing maintaining part, the somebody proposes to use and the various schemes such as sintered component of bearing with material.Be correspondence rapidly low price in recent years, connecting shaft is accepted insurance and is held structure and also must be as much as possible constitute with the parts of cheapness.
Wherein, the most representative example is, only the structure that bearing retention structure is constituted with the metal stamping processed goods.For this class formation, plurality of proposals has been proposed also so far.
In brushless motor shown in Figure 13, motor is made of rotor portions 101 and stator department 102, the motor mounting plate 103 of said stator portion 102 is processed to form plunging portion 104 in its substantial middle portion with plunging, be pressed into the bearing 106 that 105 rotations are supported freely to axle by inboard in this plunging portion 104, thereby as cartridge housing performance function.Porch in plunging portion 104 is pressed into and is fixed with the axial thrust door 107 that the axial load to rotor portions 101 supports.108 expressions have the axial thrust baffle plate 108 (reference, for example Japanese patent laid-open 8-289523 communique) of antiwear characteristic.
In addition, in brushless motor shown in Figure 14, motor is made of rotor portions 109 and stator department 110, the motor mounting plate 111 of said stator portion 110 is processed to form plunging portion 112 in its substantial middle portion with plunging, at these plunging portion 112 places, be pressed into a distolateral cartridge housing 113 that is fixed with in its cylindrical portion with cup-shaped of incorporate bottom surface.Above-mentioned cartridge housing 113 inboard chimeric has can make axle 114 freely rotatably to it bearing that supports 115.Be provided with the axial thrust baffle plate 116 of tool antiwear characteristic in the bottom surface sections of cartridge housing 113, rely on the axial load of 116 pairs of rotor portions 109 of this axial thrust baffle plate to support (reference, for example the Japan Patent spy opens the 2000-125505 communique).
Yet, for formation in the past shown in Figure 8, there is following problem, that is, fall-out preventing component is difficult to operate from the outside of brushless motor, thereby the decomposition after the assembling, repairing have difficulties.In addition, owing in the very narrow gap of rotor and stator core, fall-out preventing component is set, thereby the difficult setting that the elasticity of fall-out preventing component is suited.And fall-out preventing component is generally formed through punch process by metallic plate, and warpage workshop section is included in wherein, thereby is difficult to accurately the warpage angle be kept.
The present invention carries out for this class problem that solves in the past, even to provide after assembling dismounting also to be easy to and can easily carry out the adjusted size of fall-out preventing component and brushless motor that elasticity is set is a purpose.
The requirement of further miniaturization, slimming in recent years the brushless motor that is used for the video disc drive unit is proposed in addition.Yet, with regard to formation in the past shown in Figure 8 and bearing retention structure shown in Figure 13, follow miniaturization, the slimming of motor, the length of the part of the installation base portion that cartridge housing 24 is fixed in motor among Fig. 8 and the axial thrust door 107 among Figure 13 shorten being pressed into axial length, strength of connection reduces, thus, then sink into to keep undercapacity for the supporting of the axial load of rotor portions 21,101.Even and with bonding fixed form, thereby also exist adhesive flow to the position of bearing 21,106 to dysgenic possibilities of generation such as reliabilities.In addition, as for fixing of welding manner, then be difficult to carry out because of limit by its formation.
In addition, in bearing retention structure shown in Figure 14, exist similarly and follow miniaturization, slimming and make cartridge housing 113 and motor mounting plate 111 axial length shortens, strength of connection sinks into deficiency being pressed into.During this constitutes, as bearing retention structure shown in Figure 13, countermeasure as the supporting of the axial load of rotor portions, must support with the external diameter stage portion 117 of 118 pairs of above-mentioned cartridge housings 113 of plunging end surface of above-mentioned motor mounting plate 111, in the time must carrying out miniaturization, slimming to motor, be difficult to guarantee simultaneously above-mentioned cartridge housing 113 and the bonding strength that is embedded in the bearing 115 on its internal diameter and with these two intensity of strength of connection of motor mounting plate 111.
This bearing retention structure shown in Figure 14 is also same with example shown in Figure 13, fixedly the limit and is difficult to carry out of welding manner because of being subjected to it to constitute institute, and fixing because of the worry adhesive flow of bonding way can't be carried out to motor mounting plate.
In a word, can be well understood to, follow the going deep into of miniaturization, slimming of motor, only be difficult to guarantee strength of connection to be pressed into fixed form.Thereby, the present invention with provide the axial load that can guarantee rotor portions have high supporting rigidity and be purpose at the brushless motor of guaranteeing can to realize in the basic Chu of high reliability to be pressed into the cartridge housing linking method beyond fixing.
Summary of the invention
For solving above-mentioned problem, brushless motor of the present invention, by will to rotation and axial insertion make up locked part can be inserted, have if then be formed on the fall-out preventing component with ester moulding insertion section of the shape of its difficulty that is shaped as the metal stamping parts, thereby, when preventing the coming off of rotary body, can dismantle according to needs.
The brushless motor of technical scheme 1 of the present invention is with the video disc drive unit on the rotatable motor mounting plate that is supported on stator department freely of the axle of rotor portions by bearing and cartridge housing, it is characterized in that, the described cartridge housing that interior perimembranous is provided with described bearing is configured as cylindrical form, and its cardinal extremity is supported on the described motor mounting plate; The end face that can be supported on the described axle in the described bearing is freely rotatably bumped directly or across the axial thrust baffle plate and with described motor mounting plate connect, to make it to be subjected to axially mounting.
The brushless motor of technical scheme 2 of the present invention is characterized in that, forms the chimeric recess of peripheral part for the cardinal extremity of described cartridge housing on described motor mounting plate, and supports with the bottom surface of the described recess end to described.
The brushless motor of technical scheme 3 of the present invention is characterized in that, on the bottom surface that is formed at the described recess on the motor mounting plate, forms the groove for the cardinal extremity fastening of described cartridge housing.
The brushless motor of technical scheme 4 of the present invention is characterized in that, on the bottom surface that is formed at the described recess on the motor mounting plate, is formed for taking in the recess of axial thrust baffle plate.
The video disc drive unit of technical scheme 5 of the present invention is characterized in that, each described brushless motor in the technical scheme 1 to 4 is installed.
According to technical solution of the present invention 1 or 2 described formations, by cartridge housing being configured as cylindrical form and its cardinal extremity being supported on the above-mentioned motor mounting plate, with the axially mounting function of above-mentioned motor mounting plate performance, thereby can guarantee supporting rigidity to the axial load of rotor portions to axle.In addition, so the above-mentioned motor mounting plate of shape can be integrally formed in the punch process mode, thereby, except that parts are relatively more cheap, also can cut down part count, can improve the conveniency of assembling operation.
In addition, according to technical solution of the present invention 3 described formations, on the bottom surface that is formed at the recess on the motor mounting plate, form groove for the cardinal extremity fastening of described cartridge housing.Thus, produce in the time of both can having prevented with welding manner fixedly to the splashing of bearing portion, the adhesive intrusion of flowing out in the time of can preventing with bonding way fixedly again can possess the binding of carrying out above-mentioned cartridge housing and above-mentioned motor mounting plate on the basis of high reliability.
In addition, formation according to technical solution of the present invention 4 records, carry out the fixing of cartridge housing and motor mounting plate with the gimmick beyond being pressed into, can possess the basic enterprising joining line of high reliability, even also can easily be constituted for the motor that requires miniaturization, slimming.
Description of drawings
Fig. 1 is the sectional view of the brushless motor of (embodiment 1) of the present invention.
Fig. 2 is the sectional view with the rotor assembly among the embodiment.
Fig. 3 (a), Fig. 3 (b) are the oblique view with the oblique view of the locked part among the embodiment and other locked part.
Fig. 4 (a), Fig. 4 (b) are with the oblique view of the oblique view of the fall-out preventing component among the embodiment and other fall-out preventing component.
Fig. 5 (a), Fig. 5 (b) are with the sectional view of the part of the stator core among the embodiment and other stator core sectional view partly.
Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) want portion's sectional view with the oblique view of the oblique view of the other fall-out preventing component among the embodiment and other fall-out preventing component and other fall-out preventing component.
Fig. 7 is the assembling instruction figure with the stationary part among the embodiment.
Fig. 8 is the sectional view of brushless motor in the past.
Fig. 9 is the sectional view of the brushless motor of (embodiment 2) of the present invention.
Figure 10 (a), Figure 10 (b) are for the oblique view of the assembled state of the cartridge housing of the brushless motor among the embodiment and bearing and the oblique view of the assembled state when making it to be fastened on motor mounting plate.
Figure 11 (a), Figure 11 (b) are the oblique view of wanting portion's sectional view and motor mounting plate of the brushless motor of (embodiment 3) of the present invention.
Figure 12 (a), Figure 12 (b) are the oblique view of wanting portion's sectional view and motor mounting plate of the brushless motor of (embodiment 4) of the present invention.
Figure 13 is the sectional view of brushless motor in the past.
Figure 14 is the sectional view of another brushless motor in the past.
Embodiment
According to Fig. 1～Fig. 7 the embodiment that prevents the structure that comes off of the rotor of brushless motor of the present invention is described.
Embodiment 1
As shown in Figure 1, brushless motor 11 is made of following rotor assembly and stator assembly, the rotor assembly by central authorities be fixed with axle 1 rotor frame shell 2, be installed on the rotor magnet 3 of interior all sides of this rotor frame shell 2, the locked part 4 that is installed on the fixed part of above-mentioned axle 1 of end face of this rotor frame shell 2 is constituted; The stator assembly by the bearing 8 that supports above-mentioned axle 1 freely rotatably, with this bearing 8 remain in the cartridge housing cylindraceous 9 on all sides in it, with above-mentioned cartridge housing 9 fixedly remain in central motor mounting plate 10 mode such as to be pressed into, the stator core 6, the liner that are installed on the outer circumferential side of above-mentioned cartridge housing 9 insulating element 5a, the 5b on the surface that is assemblied in this stator core 6 and coil 7 that winds the line and the fall-out preventing component 5 that is assemblied on the said stator iron core 6 constitute.
As shown in Figure 2, in the end face central authorities of above-mentioned rotor frame shell 2, linking part 2a cylindraceous is side-prominent and form in axially.Above-mentioned axle 1 is the inboard that mode is fixed in this linking part 2a such as to be pressed into.And shown in Fig. 3 (a), above-mentioned locked part 4 radially extends the fastening teat 4b that is provided with by the 4a of annulus portion in the outside of the linking part 2a that can be inserted into above-mentioned rotor frame shell 2 and on the periphery of the 4a of this annulus portion and constitutes.Shown in Fig. 3 (b), fasten teat 4b and also can on Zhou Fangxiang, form several.On the other hand, shown in Fig. 4 (a), above-mentioned fall-out preventing component 5 is by cylindrical portion 5c, the side's of this cylindrical portion 5c end constitutes to the edge part 5d that center position extend to be provided with certainly, and the internal diameter of this edge part 5d forms the external diameter of a circle less than the fastening teat 4b of above-mentioned locked part 4.Be formed with on the part position of edge part 5d that have can be with the width of it insertion and the insertion section 5e of shape by above-mentioned fastening teat 4b is tilted, rotates at direction of principal axis.This insertion section 5e is the inclined plane shape that forms negative thread at edge part 5d formation breach.In addition, shown in Fig. 3 (b), for form the occasion that several fasten teat 4b on Zhou Fangxiang, shown in Fig. 4 (b), the insertion section 5e that the above-mentioned fall-out preventing component 5 of similar number is set in the position corresponding with above-mentioned fastening teat 4b gets final product.In the present embodiment, shown in Fig. 5 (a), the cylindrical portion 5c of above-mentioned fall-out preventing component 5 forms in the hole of the inboard that can insert said stator iron core 6, and in addition, above-mentioned fall-out preventing component 5 is formed as one by ester moulding with the following insulating element 5a that is assemblied in said stator iron core 6.And, as shown in Figure 7, the interior all sides that are inserted in the cylindrical portion 5c of the above-mentioned fall-out preventing component 5 in the hole of inboard of said stator iron core 6 are fixed on the outer circumferential side of above-mentioned cartridge housing 9 mode such as to be pressed into.In addition, shown in Fig. 5 (b), also above-mentioned fall-out preventing component 5 can be formed as one with ester moulding with the top insulating element 5b that is assemblied in said stator iron core 6.During this occasion,, thereby stator core 6 directly is fixed on the periphery of above-mentioned cartridge housing 9 in mode such as bonding gets final product because the cylindrical portion 5c of above-mentioned fall-out preventing component 5 do not insert in the hole of inboard of said stator iron core 6.
During assembling, the front end of the fastening teat 4b of rotor assembly shown in Figure 2 is tilted at direction of principal axis, rotation, simultaneously, it is screwed in while rotating and gets final product slotting leading in the insertion section 5e of the fall-out preventing component 5 shown in Fig. 5 (a) or Fig. 5 (b).In addition, by the reverse rotation of rotor assembly is screwed out, then can easily the rotor assembly be dismantled from the stator assembly.
And then, as Fig. 6 (a) to shown in Fig. 6 (c), form the L font but not the occasion on inclined-plane at cross sectional shape with the insertion section 5e of fall-out preventing component 5, when being assembled in the rotor assembly on the stator assembly, the fastening teat 4b of rotor assembly is tilted at direction of principal axis, shown in Fig. 6 (c), near the straight bottom 5f that is inserted into L font wall of the upper face side of insertion section, to fasten the opposition side that teat 4b rotates to the side 5g of L font wall along bottom 5f and with after the 5f position overlapped of bottom insert downwards again, subsequently by just inserting logical to opposite spin.In addition, in the time of with the opposite spin of rotor assembly,, can easily the rotor assembly be dismantled from the stator assembly by carrying out and above-mentioned opposite action.
In the occasion of this kind formation, owing to axle 1 must not inserted at a slant to bearing 8, thereby do not exist because of not noting the excessive load worry that bearing 8 is caused damage of exerting oneself.
Below, each embodiment that the binding of the bearing retention structure of brushless motor of the present invention and bearing holding member is correlated with according to Fig. 9～Figure 12 describes.
The brushless motor of Fig. 9 and Figure 10 (a), Figure 10 (b) expression (embodiment 2) of the present invention.
As shown in Figure 9, brushless motor is made of rotor portions 33 and stator department 40.
Rotor portions 33 has: place video disc turntable portion 28, rotor frame shell 29, with above-mentioned turntable portion 28 video disc that video disc supports is transferred core components 30, is installed on the rotor magnet 31 on the above-mentioned rotor frame shell 29 and is fixed in the axle 1 of the central authorities of above-mentioned rotor frame shell 29.
Stator department 40 has: support above-mentioned axle 1 bearing 8, keep this bearing 8 cartridge housing 9, the axial thrust baffle plate 36 of direction of principal axis upper support axle 1, with above-mentioned rotor magnet 31 relative iron cores that are wound with coil 37 38 that set, and the motor mounting plate 10 of the above-mentioned cartridge housing 9 of maintenance.
Above-mentioned cartridge housing 9 is configured as the shape that roughly is tubular integratedly, its inboard chimeric bearing 8 that has.In addition, on above-mentioned motor mounting plate 10, be integrally formed the recess 10a that above-mentioned cartridge housing 9 can be chimeric by punch process.
During assembling, at first, shown in Figure 10 (a), bearing 8 is embedded in the above-mentioned cartridge housing 9, after by rotation correction rule etc. precision, the porousness porous of bearing bore diameter being adjusted, shown in Figure 10 (b), above-mentioned cartridge housing 9 is embedded among the recess 10a that is located on the above-mentioned motor mounting plate 10.In addition, set in advance above-mentioned axial thrust baffle plate 36 in the bottom of recess 10a.
Thus, bump to connect and be subjected to axial supporting with form in recess 10a on the above-mentioned motor mounting plate 10 integratedly by axial thrust baffle plate 36 by the end face of the axle 1 of bearing 8 supporting, thereby realize the function that the axial load to rotor portions 33 supports by the structure that motor mounting plate 10 is had.Because the influence that its confining force is not linked by parts, thereby, even the miniaturization of motor, slimming degree improve, not influenced by it, can guarantee that axial load is had sufficient rigidity.
Embodiment 3
Figure 11 (a), Figure 11 (b) represent embodiments of the invention 3.
Among Fig. 9, the bottom flat of the recess 10a of motor mounting plate 10, the cardinal extremity of cartridge housing 9 only is embedded among the recess 10a with its periphery, and in the present embodiment, (embodiment 2) difference is only for being formed with the chimeric groove 41 of cardinal extremity that makes cartridge housing 9 in the bottom of recess 10a with it.Other formations of brushless motor are identical with Fig. 9.
Specifically, shown in Figure 11 (a), the bottom surface being formed at the recess 10a on the motor mounting plate 10 is provided with groove 41 also integratedly.Axial thrust baffle plate 36 is arranged at than groove 41 nearlyer inboard places.
In addition, shown in Figure 11 (b), also be formed with the protuberance that is positioned at several positions 42 that height setting becomes to be lower than embeded slot internal side diameter wall 43 in the above-mentioned groove 41.Projection welding point (projection) when this is the welding of above-mentioned cartridge housing 9.
As everyone knows, during with the binding of welding manner, splashing is a problem.If splash to bearing portion is fatefulue for brushless motor then.Yet, as mentioned above,, make splashing of taking place can not surpass embeded slot internal side diameter wall 43 by the height setting of raised part 42 is become to be lower than embeded slot internal side diameter wall 43, that is, splash and can not invade bearing portion, thereby, removed the problem of reliability aspect.Thus, in the basic Chu of high reliability, realize linking with stable welding.
In addition, certainly, when not forming raised part 42, still can bonding way link.Under this occasion, above-mentioned embeded slot internal side diameter wall 43 can prevent that adhesive from flowing out to bearing portion, thereby, in the basic Chu of high reliability, realize linking with bonding way.
Figure 12 (a), Figure 12 (b) represent embodiments of the invention 4.
Axial thrust baffle plate 36 among Figure 11 (a) is arranged at the bottom of the recess 10a of motor mounting plate 10, be provided on the smooth face than groove 41 nearlyer inboards, and in this Figure 12 (a), Figure 12 (b), be integrally formed the recess 44 of taking in axial thrust baffle plate 36 than groove 41 nearlyer inboard places.
Thus, under the situation that the thickness of slab of motor mounting plate 10 remains unchanged, guaranteed intensity by the thickness of slab of the direction of principal axis support of attenuate axle 1 only, and can guarantee the length of bearing 8, thereby, for the brushless motor that requires further miniaturization, slimming, the reliability excellence of the long lifetime aspect of motor.
In addition, the brushless motor in the various embodiments described above is used in the various video disc drive units such as video disc player or video disc CD writer, helps the slimming of video disc drive unit.
In addition, in the various embodiments described above, axial thrust baffle plate 36 is located between axle 1 and the motor mounting plate 10, also axial thrust baffle plate 36 can be saved.
Brushless motor of the present invention is useful as light media such as CD, DVD, MD with spindle drive motor etc. also requires to have high reliability outside miniaturization, slimming portable set brushless motor.In addition, the brushless motor of rotor falling preventive structure of the present invention also can be not limited to such use, also applicable to the information recording and reproducing device of the recording medium that uses other etc. and various power with in the motor.
Claims (3)
1. brushless motor, is characterized in that on the rotatable motor mounting plate that is supported on stator department freely of the axle of rotor portions by bearing and cartridge housing,
On described motor mounting plate, form the chimeric recess of peripheral part of the cardinal extremity of the described cartridge housing that supplies cylindrical form,
Central authorities in the bottom surface of described recess form the 1st protuberance, thereby form along the endless groove in the interior week of described recess between the outer peripheral face of the internal perisporium of described recess and described the 1st protuberance,
In described groove, form the internal side diameter wall highly be lower than described groove (41), with the 2nd protuberance of the direction of intersecting along the ring-type direction in interior week of recess,
The end face that can be supported on the described axle in the described bearing is freely rotatably bumped directly or across the axial thrust baffle plate and with described motor mounting plate connect, to make it to be subjected to axially mounting.
2. brushless motor according to claim 1 is characterized in that, on the bottom surface that is formed at described the 1st protuberance on the motor mounting plate, is formed for taking in the recess of axial thrust baffle plate.
3. a video disc drive unit is characterized in that, the described brushless motor of claim 1 is installed.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004201520 | 2004-07-08 | ||
| JP2004-201520 | 2004-07-08 | ||
| JP2004201520 | 2004-07-08 | ||
| JP2005142005A JP4493549B2 (en) | 2004-07-08 | 2005-05-16 | Brushless motor |
| JP2005-142005 | 2005-05-16 | ||
| JP2005142005 | 2005-05-16 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100844612A Division CN100373746C (en) | 2004-07-08 | 2005-07-08 | Brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101174780A CN101174780A (en) | 2008-05-07 |
| CN101174780B true CN101174780B (en) | 2010-11-17 |
Family
ID=35931458
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100844612A Expired - Fee Related CN100373746C (en) | 2004-07-08 | 2005-07-08 | Brushless motor |
| CN200710188746XA Expired - Fee Related CN101174780B (en) | 2004-07-08 | 2005-07-08 | Brushless motor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100844612A Expired - Fee Related CN100373746C (en) | 2004-07-08 | 2005-07-08 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN100373746C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5410302B2 (en) * | 2010-01-05 | 2014-02-05 | ミネベア株式会社 | Disk drive |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07274461A (en) * | 1994-03-31 | 1995-10-20 | Nippon Densan Corp | Micromotor |
| JP2727409B2 (en) * | 1994-04-06 | 1998-03-11 | マブチモーター株式会社 | Small motor |
| JPH08331820A (en) * | 1995-05-31 | 1996-12-13 | Matsushita Electric Ind Co Ltd | Brushless motor |
| JP2002176742A (en) * | 2000-12-08 | 2002-06-21 | Matsushita Electric Ind Co Ltd | Rotor stopper mechanism of motor and method of assembling motor therewith |
| JP2003230247A (en) * | 2002-01-31 | 2003-08-15 | Tokyo Parts Ind Co Ltd | Stator supporting mechanism in motor, and method of manufacturing the supporting mechanism |
| JP2004248332A (en) * | 2002-12-25 | 2004-09-02 | Tokyo Parts Ind Co Ltd | Spindle motor |
-
2005
- 2005-07-08 CN CNB2005100844612A patent/CN100373746C/en not_active Expired - Fee Related
- 2005-07-08 CN CN200710188746XA patent/CN101174780B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1719691A (en) | 2006-01-11 |
| CN101174780A (en) | 2008-05-07 |
| CN100373746C (en) | 2008-03-05 |
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Owner name: MEIWA MOTOR CO., LTD. Free format text: FORMER OWNER: MATSUSHITA ELECTRIC INDUSTRIAL CO, LTD. Effective date: 20110727 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20110727 Address after: Tokyo, Japan Patentee after: Meiwa Motor Co., Ltd. Address before: Japan Osaka Patentee before: Matsushita Electric Industrial Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20180708 |