CN1428778A

CN1428778A - Disk clamping mechanism

Info

Publication number: CN1428778A
Application number: CN02158381A
Authority: CN
Inventors: 土屋昌久
Original assignee: TOKYO SPARE PARTS INDUSTRIAL Co Ltd
Current assignee: TOKYO SPARE PARTS INDUSTRIAL Co Ltd; Tokyo Parts Ind Co Ltd
Priority date: 2001-12-28
Filing date: 2002-12-30
Publication date: 2003-07-09
Also published as: JP2003203410A; KR20030057301A

Abstract

The invention provides a disk clamping mechanism which stably maintains centering even when it is used at high speed revolution by solving a skid caused by centrifugal force during high speed revolution resulting from the mass eccentricity of a disk. There is provided with at least a pressing part (4d) for pressing a disk inner aperture outwards, made of a centering lug 4d, on the disk centering part in the center of a turntable 4 of the mainshaft engine rotary shaft, the disk is centered using the pressing part, at the same time, the nip can press the disk on the turntable to clamp it, provided with a projecting part for pressing the inner aperture of the disk exteriorly in the nip.

Description

The disc clamp system

Technical field

The present invention relates to a kind of particularly disc clamp system of the recording/displaying device of CD of video disc that uses.

Background technology

Usually, made by synthetic resin as the video disc of recording playback medium removably, the heart is provided with center pit therein.When recording and playing with this disc, the central aperture of disc is installed on the rotating disk of video disc recording/displaying device, and make its rotation, the diameter of disc center pit error on making is bigger, cause off-centre easily to the rotating disk of disc, and, light can take place thus pick up the track record problem that (コウピ Star Network ア Star プ) breaks away from disc in the rotation, thereby can't carry out normal recordings or broadcast.Therefore, on the rotating disk of disc drive appts, must design the center that makes this disc and the spindle drive motor that makes the video disc rotation are arranged the (adjective-centre structure that the rotation center of スピ Application De Le モ-) is consistent.

So in the past adjective-centre structure generally is to be located in the centre pilot portion that the guiding disc of center of turntable is placed, and a plurality of centering jaws that the placement disc is felt relieved of being used for are set.In addition, the external diameter of this centre pilot portion base portion, little than the minimum permissible value of disc center bore, and with it be made in the coaxial circle of the rotation axis of spindle motor on.

On the other hand, centering jaw has elasticity, evenly configuration is a plurality of on the heart guide part concentric circles hereinto, and the diameter of a circle of the envelope at its top is made into little than the top end diameter of this centre pilot portion, and the diameter of a circle of the envelope of its base portion is made big than the maximum permissible value of disc center bore.

Disc is placed on the rotating disk with such disc clamp system, when the center pit of disc inserts the centre pilot portion top of rotating disk, produce magnetically mutually opposed with the magnet at the center of the centre pilot portion that this rotating disk is installed, being configured in the folder (Network ラ Application パ-) of this device strut angle (シジア Application グ Le) and the disc bearing face of rotating disk descends abreast, and begin to push disc, between the magnet of rotating disk and folder, produce the magnetic attraction effect, utilize such magnetic force that the disc of being placed is come clamping by rotating disk magnet and folder.Thus, the center pit of disc snaps in centre pilot portion and is pressed against its base portion, and the elasticity by centering jaw is evenly pushed the center pit circumferential surface of disc to direction radially simultaneously.

And, be fixed with the slip-proofing device that rubber or synthetic resin are made in the periphery of the disc bearing face of aforementioned rotating disk.Even because the disc by aforesaid rotating disk and folder clamping centering, also have owing to, cause the situation of horizontal slip because of breaking away from the centrifugal force in the rotation that rotation center produces, therefore, above-mentioned slip-proofing device is for preventing that so horizontal slip from using.Like this, the centering of disc process also is placed on the rotating disk, and also can keep the centering state in rotation process.

But, because high-speed rotation ground uses above-mentioned disc in recent years,, will increase number of revolutions owing to the rotary body energy imbalance as long as in the disc face very little off-centre is arranged, produce bigger centrifugal force simultaneously, and make disc itself that bias voltage take place.This be because for offset, the centrifugal force that produced can with rotation number square ratio produce, even if under initial state, the disc of being felt relieved as described above and fixing also can be when rotation number increases, and the excessive power that increases owing to geometry causes disc amesiality.

So, if the elasticity of aforesaid centering jaw a little less than, this centering jaw just can not be resisted centrifugal force excessive in high speed rotating, just becomes soon and can not keep the centering of disc.And, do the elasticity of centering jaw stronger in order to overcome this centrifugal force, will be not easy the center pit of disc is snapped in location hook, or the disc of take place placing such as is suspended on the loading end of rotating disk at problem.And, if for this disc is not suspended, and increase the magnetic force of clamping disc, will make disc excessive, and slip-proofing device is fixed on the problem on the disc by the power that is pressed on the rotating disk loading end.

Summary of the invention

The purpose of this invention is to provide a kind of disc clamp system, it can solve because the centrifugal force that the off-centre of disc causes causes the problem that loses centering in the high-speed rotation process, even use disc in high-speed rotation, also can keep firm centering state.

In order to realize aforementioned purpose, according to disc clamping device provided by the invention, on the disc bourrelet that is installed on the center of turntable on the spindle motor rotation axis, at least arranged a press section of the inner diameter hole of pushing video disc from the outside, when video disc being felt relieved by this press section, by folder this video disc pressing clip is held on the rotating disk, in aforesaid folder, is provided with the jut of pushing above-mentioned video disc endoporus from the outside.

Specifically, achieving the goal by following method, that is, aforementioned press section is made into claw-like, is that the inner periphery from the rotating disk more inside than disc internal diameter is provided with; Or aforementioned press section is made into claw-like, be that the excircle from the rotating disk more outside than disc internal diameter is provided with.

And then because aforementioned jut contacts with aforementioned press section, contact portion is made into cone-shaped for well.

And, be provided with the annular recess portion that surrounds the such rotation axle in aforementioned press section, magnet at this depressed part internal fixation, the position faced mutually of magnet therewith on aforementioned jut has the magnetic material that is attracted by aforementioned magnet; Perhaps aforementioned press section also can be provided with the annular recess portion that surrounds the such rotation axle, is fixing magnetic material in this depressed part, is fixing magnet on the position that magnetic is faced therewith on the aforementioned jut.

Utilize the present invention, can solve because,, also can keep firm centering state even in high-speed rotation, use by the problem of the former of the centrifugal force in the eccentric high-speed rotation process that produces of disc thereby the horizontal slip that causes by the folder jut.

Utilize the present invention, can also strengthen claw and increase pressing force laterally.

Utilize the present invention, in the time of the installation that can also easily press from both sides, increased pressing force.

And, utilize the present invention, can firmly fix folder.

Brief Description Of Drawings

Fig. 1 is the sectional view of major part of the embodiment 1 of disc clamping device of the present invention.

Fig. 2 is the vertical view of the rotating disk in the key diagram 1.

Fig. 3 is the stereographic map of the rotating disk among Fig. 1.

Fig. 4 is the stereographic map of the folder among Fig. 1.

Fig. 5 is the major part sectional view of the state of disc among the embodiment of clamping Fig. 1.

Fig. 6 is the major part amplification profile of the process of the disc of clamping Fig. 1 variation.

Fig. 7 is the major part sectional view of the variation of embodiment 1.

The major part amplification profile of the clamping disc process that Fig. 8 is correlated with for Fig. 7.

Fig. 9 is the major part sectional view of the disc clamp system of the embodiment of the invention 2.

Figure 10 is the major part sectional view of other distortion of the embodiment of the invention 1.

Symbol description

1 motor fixed angles

2 rotors

3 rotation axiss

4 rotating disks

5 folders

6 strut angles

7 magnets

8 slip-proofing devices

Embodiment

Under look like figure and embodiments of the present invention be described with each embodiment.

Fig. 1 is the sectional view of major part of the embodiment 1 of disc clamp system of the present invention.Fig. 2 is the vertical view of the rotating disk in the key diagram 1, and Fig. 3 is its stereographic map.Fig. 4 is the stereographic map of the folder among Fig. 1.Fig. 5 is the sectional view of the major part of clamping disk sheet state among Fig. 1.Fig. 6 is the major part amplification profile of clamping disc process in the key diagram 1.

Among Fig. 1, fixing rotating disk 4 at the top of rotation axis 3, this rotation axis 3 is fixed on the rotor 2 of the spindle motor of being fixed on the motor fixed angles 1 of recording/displaying device.And engine fixed angles 1 can move along the axis direction of rotation axis 3, schemed unshowned mechanism to be installed in the recording/displaying device.And, folder 5, the gap is left at the top of its center and rotation axis 3, and coaxial with the axis direction of rotation axis, is supported for suspension status by the strut angle 6 of this recording/displaying device.

Among Fig. 2 and Fig. 3, by the ring center guide part 4a of tapering be pressed into the magnet 7 of fixing ring-type among the 4c of annular groove portion that rim (ボス) 4b of portion of axle forms, this tapering is the embedding that is used to guide the disc of being located at rotating disk 4 central portions, and be provided with a plurality of five equilibriums ground cut off the centre pilot 4a of portion, as toward the outer side the claw-like centering jaw 4d of having of press section, this centering jaw 4d has the elasticity that can be pressed in radial direction.And around the disc bearing face 4e of rotating disk 4, fixing slip-proofing device 8.

Among Fig. 4, folder 5 is made of magnetic materials such as iron plates, and supported angle 6 cards end for the flange part 5a of suspension status and disc press section 5b, and at the 5d of conical surface portion and the 5e of hole portion of the cylindrical portion formation of the jut 5c of central authorities.As shown in Figure 3, the diameter of the 5e of hole portion is big than the external diameter of the 4b of rim portion of rotating disk 4, and the diameter on the top of tapering 5d is designed to little than the external diameter of the 4c of ditch portion of the ring-type of rotating disk 4.By structure of the present invention, the teat 5c that has only folder 5 perhaps is made of the magnetic material of sneaking into Magnaglo with formations such as iron plates, in addition also can make with nonmagnetic substance, and it is also passable perhaps to be fixed with magnetic material in the inboard of jut 5c.

Among Fig. 5, the flange part 5a of folder 5 breaks away under the state of strut angle 6, and the magnet 7 that jut 5c is fixed on the rotating disk 4 attracts, and together clamps disc 9 by disc press section 5b with the slip-proofing device 8 that is fixed on the rotating disk 4.And the center pit 9a of disc 9 does not contact the base portion of the 4a of centre pilot portion of rotating disk 4, but the centering jaw 4d that is subjected to rotating disk 4 is from pushing radially.

(a)～(c) of Fig. 6 is the major part amplification profile of the relevant clamping disc process of key diagram 1.Omitted strut angle 6.

Fig. 6 (a) expression disc 9 snaps in the situation before the centering jaw 4d.In Fig. 6 (a), the edge 9a of the center pit of disc 9 does not contact the 4a of centre pilot portion but touches the top of centering jaw 4d.

Fig. 6 (b) expression rotating disk 4 moves closer to folder 5, and the disc press section 5b of folder 5 begins to push the state of disc 9.In Fig. 6 (b), the edge 9a of the center pit of disc 9 does not touch the 4a of centre pilot portion, the tapering 5d of folder 5 pushes the top of centering jaw 4d around rotating disk 4, the top of centering jaw 4d is pressed against the edge 9a of disc 9 center pits, and beginning is to the center curvature of rotating disk 4.

The state that disc clamps has been finished in Fig. 6 (c) expression.In Fig. 6 (c), the magnet 7 that the jut 5d of folder 5 is set at the 5c of hole portion of rotating disk 4 central authorities attracts, disc press section 5b with disc 9 securely when being pressed on the slip-proofing device 8 that is fixed in rotating disk 4, the taper 5d of folder 5 does not contact the 4a of centre pilot portion of rotating disk 4, with the head of centering jaw 4d closely by press to rotating disk around, and, therefore form centering jaw 4d for this reason the edge 9a of disc 9 center pits is pushed to radial direction because the edge 9a of the center pit of disc 9 is further crooked to the center of rotating disk 4 with the top of centering jaw 4d.

Like this, aforementioned centering jaw 4d, with the concentric circle of the 4a of centre pilot portion of rotating disk 4 on evenly be provided with a plurality ofly, and owing to have identical elasticity separately, therefore can make all power of radial direction of the edge 9a that pushes aforementioned disc 9 even.Like this because disc 9 by centering jaw 4d by centering is fixing securely, even therefore do not have during high-speed rotation yet take place eccentric.

Fig. 7 is the major part sectional view of the variation of embodiment 1.Fig. 8 is the major part amplification profile of the relevant clamping disc process of key diagram 7.

This distortion is to change the structure example of Fig. 1 to centering jaw 4d shown in Figure 3, forms the claw-like centering jaw 14d to rotating disk 14 center positions as shown in Figure 7 at the edge of rotating disk 14.

(a)～(c) of Fig. 8 is the major part amplification profile of the relevant clamping disc process of key diagram 7.Omitted strut angle 6.

Fig. 8 (a) expression disc 9 snaps in the situation before the centering jaw 14d.In Fig. 8 (a), the edge 9a of the center pit of disc 9 does not contact the 14a of centre pilot portion but touches the base portion of centering jaw 14d.

Fig. 8 (b) expression folder 5 is near rotating disk 14, and the disc press section 5b of folder 5 begins to push the state of disc 9.In Fig. 8 (b), the edge 9a of the center pit of disc 9 does not touch the 14a of centre pilot portion, the tapering 5d of folder 5 pushes the top of centering jaw 14d around rotating disk 14, the base portion of centering jaw 4d is owing to snap in the edge 9a of disc 9 center pits forcibly, and beginning is to the center curvature of rotating disk 4.

The state that disc clamps has been finished in Fig. 8 (c) expression.In Fig. 8 (c), the interior magnet 7 of the 14c of ditch portion that the jut 5d of folder 5 is set at rotating disk 14 central authorities attracts, disc press section 5b with disc 9 securely when being pressed on the slip-proofing device 8 that is fixed in rotating disk 14, folder 5 taper 5d does not contact the edge of the 14a of centre pilot portion of rotating disk 14, with the head of centering jaw 14d forcibly by press to rotating disk 14 around.And since the edge 9a of the center pit of disc 9 with the base curve of centering jaw 14d to the center of rotating disk 14, therefore, form centering jaw 14d for this reason the edge 9a of disc 9 center pits pushed to radial direction.

And, aforementioned centering jaw 14d, with the concentric circle of the 14a of centre pilot portion of rotating disk 14 on evenly be provided with a plurality ofly, and owing to have identical elasticity respectively, therefore can make whole power of radial direction of the edge 9a that pushes aforementioned disc 9 even.Like this because disc 9 is fixing by centering securely by centering jaw 14d, even therefore do not have during high-speed rotation yet take place eccentric.

And then, as other variation of centering jaw as shown in figure 10, form at the edge of rotating disk 34 towards rotating disk 34 centers and towards the centering jaw 14d of the claw-like of disc 9 warpages.By such structure, the top of centering jaw 34 is pressed from both sides 35 taper 35d when pushing, and the protuberance 34f that is arranged in the curved surface of this centering jaw 34 pushes the edge 9a of disc 9 to direction radially.And, if only just the edge 9a of disc 9 can be pushed to radial direction, there is not this protuberance 34f passable by the curved surface of centering jaw 34 yet.

For any distortion of embodiment 1,, therefore be fit to comprise disc clamp system lightening of rotating disk because can be linearly centering jaw be set according to the edge of rotating disk.

Fig. 9 is the major part sectional view of the embodiment of the invention 2.

Present embodiment is provided with the yoke of being made by magnetic materials such as iron plates (ヨ-Network) in the position of the magnet 7 of rotating disk 4 one sides of the embodiment of Fig. 1, is provided with the magnet that attracts usefulness in a side of the folder of facing mutually with it.In Fig. 9, be provided with the 24c of annular groove portion at rotating disk 24 middle parts, the 24c of this annular groove portion is in order to guide the snapping in of disc of being located at rotating disk 24 central portions and formed by ring center guide part 24a with conical surface and the 24b of rim portion that axial compression is gone into, in the 24c of this annular groove portion, fixing the yoke of making by magnetic materials such as ring-type iron plates 10, and be provided with a plurality of even cut-out centre pilot portion 24a's and to have flexible, the top that can push to direction radially be the centering jaw 24d of claw-like.And, around the disc bearing face 24e of rotating disk 24, fixing slip-proofing device 8.

And, folder 25, with the annular groove 24c of the 24a of centre pilot portion that is fixed on rotating disk 24 on the central teat 25c that faces mutually of yoke 10 on, peripheral part is formed with conical surface 25d and the 25e of hole portion.The diameter on the conical surface 25d top of the 25e of hole portion of folder 25 jut 25c, little than the external diameter of the annular orifice portion 24c of rotating disk 24, in the 25e of this ditch portion, be fixed with the internal diameter annular magnet 27 bigger than the 24b of the rim portion external diameter of rotating disk.And the sucking action of this structure, with among the embodiment 1 explanation identical.

This embodiment 2 because magnet is fixed on the rotating disk and folder this be not fixed with magnet on one's body, therefore can use synthetic resin to make the folder body, be more suitable for comprising the thinning and the lighting of the disc clamp device of rotating disk.

Effect of the present invention

As mentioned above, in the present invention, by the center of pressing aforementioned disc the setting of aforementioned folder The jut of bore edges when clamping disc, is pressed aforementioned rotating disk with the jut of this folder In the time of the press section, firmly press the edge of the video disc centre bore installed the press section of aforementioned rotating disk Press, even high speed rotating the time, also can not take place to produce because of self gravity center eccentric of disc Centrifugal force and cause eccentric problem.

And, by the present invention, be provided with to the disc centre bore in the centre pilot section of rotating disk The press section can provide a kind of frivolous disk clamping mechanism, and its utilization is pressed by folder and installed Disc, even high speed rotating the time, can not take place to produce because of self gravity center eccentric of disc yet The centrifugal force of giving birth to and cause eccentric problem.

Claims

1. a disc clamp system is characterized in that: be located on the disc bourrelet of the rotating disk central authorities on the spindle motor rotation axis, be provided with the press section that at least one can push the endoporus of video disc laterally; When carrying out disc centering, utilize folder that this disc is pushed, clamped by this press section; On aforementioned folder, be provided with and the contacted jut in aforementioned press section.

2. disc clamp system as claimed in claim 1 is characterized in that: aforementioned press section is made into claw-like, is that the inner periphery from the rotating disk more inside than disc internal diameter is provided with.

3. disc clamp system as claimed in claim 1 is characterized in that: aforementioned press section is made into claw-like, is that the excircle from the rotating disk more outside than disc internal diameter is provided with.

4. disc clamp system as claimed in claim 1, owing to aforementioned jut contacts with aforementioned press section, so this contact portion is made into taper.

5. disc clamp system as claimed in claim 1, on aforementioned press section, be provided with around the depressed part of such rotation axle, at this depressed part internal fixation magnet is arranged, the position faced mutually of magnet is provided with the magnetic material that attracts mutually with aforementioned magnet therewith on aforementioned jut.

6. disc clamp system as claimed in claim 1, aforementioned press section are provided with around the depressed part of such rotation axle, and at this depressed part internal fixation magnetic material, the stationkeeping faced mutually of magnetic material has magnet therewith on aforementioned jut.