CN1081379C - Disk player - Google Patents

Disk player Download PDF

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Publication number
CN1081379C
CN1081379C CN98103853A CN98103853A CN1081379C CN 1081379 C CN1081379 C CN 1081379C CN 98103853 A CN98103853 A CN 98103853A CN 98103853 A CN98103853 A CN 98103853A CN 1081379 C CN1081379 C CN 1081379C
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CN
China
Prior art keywords
player
turning axle
base plate
weighing apparatus
self
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN98103853A
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Chinese (zh)
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CN1191367A (en
Inventor
孙镇升
卢大成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Samsung Storage Technology Korea Corp
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of CN1191367A publication Critical patent/CN1191367A/en
Application granted granted Critical
Publication of CN1081379C publication Critical patent/CN1081379C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G11B19/2018—Incorporating means for passive damping of vibration, either in the turntable, motor or mounting
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/08—Insulation or absorption of undesired vibrations or sounds

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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

A disk player includes a deck base, a deck plate elastically coupled to the deck base, a buffering member interposed between the deck base and the deck plate, a spindle motor coupled to the deck plate and having a stator, a rotor and a rotational shaft, a turntable installed at the rotational shaft, a clamper, and an optical pickup for recording/reproducing information on/from the disk. A self-compensating dynamic ring balancer is coupled to the spindle motor and positions the center of gravity thereof opposite to that of the disk with respect to the rotational shaft during rotation of the disk. Therefore, the revolution of the rotational shaft of the spindle motor due to the eccentric center of gravity of the disk can be reduced.

Description

CD player
The present invention relates to a kind of CD player, particularly relate to a kind of in order to limit the CD player of having equipped the dynamic annular flat weighing apparatus of self-compensation type owing to the eccentric generation of CD center of gravity internal vibration.
CD player can on recording media, record and (or) information reproduction data from record media such as CD, CD ROM or DVD etc.This CD player also should be able to protect CD and optical head not to be subjected to the interference of external impact and internal vibration.
As shown in Figure 1, traditional CD player comprises a bottom block 10 that also can pivot with housing hinged (not expressing among the figure) in vertical direction, a base plate 20 that is connected with bottom block 10, one is installed in the Spindle Motor 21 that rotary power is provided to CD 1 on the base plate 20, a turntable 23 that is used for holding CD 1 that is connected with the rotating shaft 22 of Spindle Motor 21, one is installed in the housing with opposed being used for of turntable 23 CD 1 is compressed and be positioned at compactor 40 on the turntable 23, and CD crossed over 1 that is connected with base plate 20 move be used for finishing and record or the optical head 25 of playing program.
This CD player also is equipped with damper element 30 and is used for preventing that outside vibration is directly delivered to base plate 20, Spindle Motor 21 and optical head 25 by subbase 10 between its bottom block 10 and base plate 20.This damper element is to be made so that decay external vibration fully by soft rubber or polyurethane one class material.
CD player with said structure can protect CD 1 and optical head 25 to avoid the interference of external vibration effectively.Yet it is the attenuation problem of unresolved internal vibration also, and this vibration causes owing to the CD center of gravity is eccentric during Spindle Motor 21 rotations.Here, CD center of gravity off-centre is to cause owing to CD 1 makes to produce not overlap between the rotation center of CD 1 and center of gravity in the error of manufacture process.So, the turning axle 22 of Spindle Motor 21 will revolution occur because of fast rotational.
When the like 1 times of speed of slow-speed of revolution pattern or 2 times of fast modes, this revolution of Spindle Motor turning axle also is unlikely to cause great problem.But under the situation of high rotating speed pattern as 6 times, 8 times, 12 times or 24 times fast modes, the influence that this revolution of Spindle Motor produces will become seriously, even is difficult to information is recorded and reproduced.
Consider the problems referred to above, the ways such as rigidity of the quality of common employing increase installation Spindle Motor base plate or increase damper element reduce to move owing to the base plate that CD center of gravity off-centre causes in traditional high rotating speed CD player., increase base plate quality also to no effect for high speed rotating.And, when increasing, the rigidity of damper element just can not decay effectively from the vibration or the impact of outside.
The purpose of this invention is to provide a kind of CD player, the internal vibration that causes owing to CD center of gravity off-centre in this machine can adopt the dynamic annular flat weighing apparatus of a kind of self-compensation type fundamentally to be removed.
In order to achieve the above object; comprise bottom block according to CD player provided by the present invention; the base plate that is connected with bottom block elasticity; be placed on the damper element of avoiding external impact between bottom block and the base plate with the protection base plate; be installed in the Spindle Motor that rotary power is provided to CD on the base plate; this motor has the stator that is fixed on the base plate, and be equipped with by and stator between mutual electromotive action power promote rotor rotated, turning axle just extends out from rotor.This CD player also comprises and is installed in the turntable that is used for holding CD on the turning axle, CD compressed and navigates to the compactor on the turntable, be installed in the optical head on the base plate, it can be crossed over, and CD moves so that record on CD or information reproduction data from CD, and the dynamic annular flat weighing apparatus of the self-compensation type that is connected with Spindle Motor, during CD rotation the center of gravity of the center of gravity of this evener and CD with respect to turning axle opposite one another, the result has reduced the revolution of the Spindle Motor turning axle that causes owing to CD center of gravity off-centre.
Above-mentioned purpose of the present invention and advantage will elaborate to preferred embodiment by the reference accompanying drawing and become more obvious.These accompanying drawings are:
Fig. 1 is the decomposition diagram of traditional CD player;
Fig. 2 is a decomposition diagram according to the CD player of the embodiment of the invention;
Between the off-centre that Fig. 3 a to 3c represents the CD center of gravity respectively and its centre of gyration when different rotating speeds with respect to the location diagram of CD turning axle;
Fig. 4 is the cut-open view according to the dynamic annular flat weighing apparatus of the self-compensation type of a preferred embodiment of the present invention;
Fig. 5 is the perspective diagram that the dynamic annular flat weighing apparatus of self compensation of turntable is not housed shown in Figure 4;
Fig. 6 is the cut-open view according to the dynamic annular flat weighing apparatus of the self-compensation type of another preferred embodiment of the present invention;
Fig. 7 is the cut-open view according to the dynamic annular flat weighing apparatus of the self-compensation type of another preferred embodiment of the present invention; And
The CD player that Fig. 8 a and 8b represent respectively to have the dynamic annular flat weighing apparatus of self-compensation type according to the present invention between the off-centre of CD center of gravity under the different rotating speeds and its centre of gyration with respect to the location diagram of CD turning axle.
As shown in Figure 2, CD player according to the preferred embodiment of the present invention comprises bottom block 50, the base plate 60 that is connected with bottom block 50 elasticity, be placed on the damper element 70 between bottom block 50 and the base plate 60, be installed in the Spindle Motor 90 on the base plate 60, turntable 63, optical head 65, CD 1 is remained on compactor 80 on the turntable 63, and the dynamic annular flat weighing apparatus 200 of self-compensation type, it is used to limit the revolution of the turning axle 92 of the Spindle Motor 90 that the off-centre by the CD center of gravity causes.
Bottom block 50 is hinged with a side of housing (not expressing among the figure), and can rotate up and down around pivot.Base plate 60 is subjected to resulting from the effect of bottom block 50 impulsive force in addition, and this impulsive force is weakened by damper element 70.Therefore, preferably reduce the rigidity of damper element 70 and the center of gravity of reduction base plate 60.Spindle Motor 90 can provide the revolving force that drives the CD rotation.The turning axle 92 concentric installations of turntable 63 and Spindle Motor 90, CD 1 places on the upper surface of turntable 63 when operation.Compactor 80 faces turntable 63 and produces unnecessary movement to prevent CD 1 back in place.Here, Spindle Motor 90 comprises stator (not expressing among the figure) and the rotor (not expressing among the figure) that matches with stator, and a turning axle 92 is arranged.Rotor is by the foreign current driven in rotation.The turntable 63 that is fixed on when rotor rotation on the turning axle 92 also and then rotates, thereby drive CD 1 and compactor 80 rotate together.
With reference to Fig. 3 a to 3c, will do an explanation to the relation between CD center of gravity off-centre and its centre of gyration under the different discs rotating speed.
Fig. 3 a is represented is the orbital motion of revolution when the turning axle 92 of Spindle Motor 90 CD 1 when being equal to or less than the free-running frequency of base plate 60 and rotatablely moves.Here, the size of free-running frequency depends on the quality on the module of elasticity of damper element 70 and chassis 60 and is installed in other elements 63,65 on the base plate 60 and 90 quality.Free-running frequency has characterized the vibration frequency of horizontal direction (direction that promptly is parallel to disc plane).As shown in the figure, as the center of gravity m of the off-centre of CD 1 eBe in and its rotation center C 1The P that separates a preset distance 1During the position, the rotation center C of CD 1 1Turn to position C around centre of gyration C 2, C 3And C 4Corresponding to each rotation center C 2, C 3And C 4The center of gravity m of the off-centre of CD 1 eThe position be in P respectively 2, P 3And P 4Here, the center of gravity m of centre of gyration C and CD 1 off-centre eEach position P 1, P 2, P 3And P 4Each rotation center C with respect to CD 1 1, C 2, C 3And C 4Be opposite one another.
Fig. 3 b is represented is the orbital motion of revolution when the turning axle 92 of Spindle Motor 90 CD 1 when close with above-mentioned free-running frequency and rotatablely moves.As shown in the figure, the center of gravity m of centre of gyration C and CD 1 off-centre eEach position P 1, P 2, P 3And P 4Each rotation center C with respect to CD 1 1, C 2, C 3And C 4Be mutually perpendicular.
Fig. 3 c is represented is the orbital motion of revolution when the turning axle 92 of Spindle Motor 90 CD 1 during greater than above-mentioned free-running frequency and rotatablely moves, record on the CD and from the CD the normal rotational speed of information reproduction data just belong to this situation.At this moment the center of gravity m of centre of gyration C and CD 1 off-centre eEach position P 1, P 2, P 3And P 4Each rotation center C with respect to CD 1 1, C 2, C 3And C 4Be in equidirectional.
The invention is characterized in that the dynamic annular flat weighing apparatus 200 of self-compensation type reduces excentricity by the relation between the CD center of gravity of utilizing the centre of gyration and off-centre.
The rotating element that the dynamic annular flat weighing apparatus 200 of self-compensation type is installed in Spindle Motor 90 is on rotor 93 (see figure 4)s or the turning axle 92, its vicissitudinous when rotated center of gravity.
As shown in Figure 4, be installed in the turntable 63 (see figure 2)s rotation that Spindle Motor 90 promotions on the base plate 60 are connected with turning axle 92.
Spindle Motor 90 comprises motor base 91, turning axle 92, rotor 93, stator 97 and bearing 101 and 102.Motor base 91 is connected with base plate 60, and a through hole 91a is arranged on it.Turning axle 92 is assemblied in the through hole 91a with bearing 101 and 102.
Rotor 93 is fixed on an end of turning axle 92, and it has a shell 94 round stator 97, and magnet 95 is fixed on the inside surface of shell 94.Here, there is a retaining element 96 coupling part between shell 94 and turning axle 92, is used for preventing that turning axle 92 from skidding off in the shell 92 or dally.
Stator 97 is fixed on the bottom surface of motor base 91, and it comprises an iron core 98 towards magnet 95.Coil 99 is around iron core 98. Bearing 101 and 102 is installed between through hole 91a and the turning axle 92 and at the radial and axial turning axle that supporting.This a pair of bearing 101 and 102 separates a preset distance when installing in through hole 91a.That is, clutch shaft bearing 101 has one tightly to be enclosed within the inner ring on the turning axle 92 and to press fit over the interior outer ring of through hole 91a, so the radial and axial motion of turning axle 92 just is restricted.Second bearing 102 is embedded in the through hole 91a and can slides, thereby prevents that turning axle 92 from tilting.Flexible member 103 is placed on to be used for decaying in the through hole 91a between the clutch shaft bearing 101 and second bearing 102 and passes to the whirling vibration of motor base 91 from rotor 93.Consider the needed bearing accuracy of high speed rotating, bearing 101 and 102 is preferably selected metal bearing for use.But, also can select multi-form bearing for use, as ball bearing or air hydrodynamic bearing.
Now with reference to Fig. 4 to 6 pair according to first of the dynamic annular flat weighing apparatus of self-compensation type of the present invention
Embodiment does an explanation.
Shown in Figure 4 and 5, the dynamic annular flat weighing apparatus of self-compensation type comprises a pair of ring 210 around turning axle 92 at least.Each ring 210 all is circular, and when turning axle 92 during rotation produced revolution owing to inner vibration, ring 210 just revolved axle according to speed of gyration around turning axle 92, and the revolution of turning axle at this moment just is restricted.Will discuss after a while about rotating principle.Each ring 210 all is to be enclosed within on the turning axle 92, and is between base plate 60 and the turntable 63, and its internal diameter is less than the diameter of turntable 63, throws away from turning axle 92 to prevent to encircle in the running 210.
In addition, as shown in Figure 6, the dynamic annular flat weighing apparatus 200 of self-compensation type can also comprise a protecting component for protection ring 210 that is fixed on the turning axle 92.This protecting component can prevent that stop ring 210 contacts with fixed part (as base plate 60) when rotated.As shown in the figure, protecting component is an outer cover 220 preferably, and it is installed on the turning axle 92 and surrounds ring 210.Outer cover 220 has the cover body 221 and the cover cap 222 that matches with the opening portion of cover body 221 that are installed on the turning axle 92.In addition, protecting component also can be the bottom that a bracket (not expressing among the figure) that is installed on the turning axle 92 is used for holding ring 220.
Refer again to Fig. 7, second embodiment according to the dynamic annular flat weighing apparatus of self-compensation type of the present invention done an explanation.
As shown in the drawing, the dynamic annular flat weighing apparatus 200 of this self-compensation type comprises the ring 210 that a pair of Wei Rao the rotors 93 that are inserted in the housing 94 move, and one is being supported and encircles 210 protecting component.This protecting component is installed on the housing 94 in case stop ring 210 throws away from housing.
Protecting component is an outer cover 230 that surrounds ring 210 preferably, as shown in the figure.Outer cover 230 has the cover body 231 and the cover cap 232 that matches with the opening portion of cover body 231 that are installed on the housing 94.In addition, protecting component also can be the bottom that a bracket (not expressing among the figure) that is installed on the housing 94 is used for holding ring 210.
Though at the dynamic annular flat weighing apparatus 200 of the self-compensation type shown in Fig. 4 to Fig. 7 are a pair of rings, also can adopt three or more rings.
As mentioned above, thus the dynamic annular flat weighing apparatus 200 of this self-compensation type preferably adopts nonmagnetic substance to make can get rid of near the influence of the magnetic attraction the evener.In other words, ring and protecting component can be chosen a kind of processing and manufacturing that comes from following one group of material.These materials are: tungsten carbide wc, copper beryllium alloy steel CuBe, nickel-base alloy C-276, silicon nitride Si 3N 4, zirconia ZrO 2, formula series steel YHD50 difficult to understand, nonmagnetic metal such as SUS300, SUS304 and SUS316, and pottery or synthetic resin.
In addition, ring and (or) protective element preferably adopt can be not oxidized the like SUS300 of material, pottery, and synthetic resin or material with oxidation resistant coating are made.This material that oxidation resistant coating arranged can be selected for use with carbon steel or chromium steel and be substrate and plate zinc or the material of nickel chromium triangle coating.
With reference to Fig. 2,8a and 8b are to doing an explanation according to the operating mechanism that reduces CD center of gravity Influence from Eccentric of the present invention below.
When the revolution of CD 1 is equal to or less than free-running frequency, shown in Fig. 8 a, the center of gravity m of the off-centre of CD 1 ePosition P i(i=1,2,3 and 4) and compensation center of gravity m c, promptly encircle the position P ' of 210 center of gravity i(i=1,2,3 and 4) and the position C of centre of gyration C with respect to turning axle 92 i(i=1,2,3 and 4) are opposite one another.At this moment, the turning radius of turning axle 92 will become big.
Yet when CD 1 rotates its ratio of revolution free-running frequency when much bigger by normal speed, shown in Fig. 8 b, the center of gravity m of the off-centre of centre of gyration C and CD 1 ePosition P i(i=1,2,3 and 4) are with respect to the position C of turning axle 92 iBe to be in homonymy, and compensation center of gravity m cPosition P ' i(i=1,2,3 and 4) are because action of centrifugal force then is in opposite side.So, owing to the eccentric non-equilibrium state that produces of the center of gravity of CD 1 just can be compensated, the turning radius of turning axle 92 will reduce significantly.Therefore, because the center of gravity m of CD 1 eThe internal vibration power of the base plate 60 that causes of off-centre just be attenuated.
As mentioned above, according to the CD player that has adopted the dynamic annular flat weighing apparatus of self-compensation type of the present invention, when the center of gravity of its employed CD presents the big vibration of restricted internal effectively when eccentric.In addition, in CD player, adopt the more weak damper element of rigidity also can relax outside impact effectively.

Claims (8)

1. CD player; bottom block is arranged; the base plate that is connected with bottom block elasticity; be placed between described bottom block and the described base plate to protect described base plate to avoid the damper element of external shock; be installed in the Spindle Motor that rotary power is provided to CD on the described base plate; described Spindle Motor has a stator that is fixed on the described base plate; and be equipped with by and described stator between mutual electromotive action power promote rotor rotated; the turning axle that extends out from described rotor; be installed in the turntable that is used for holding CD on the described turning axle; CD compressed and is positioned at the compactor on the described turntable; be installed in the optical head on the described base plate; it can be crossed over, and CD moves so that record on CD or information reproduction data from CD; it is characterized in that; this CD player comprises the dynamic annular flat weighing apparatus of the self-compensation type that is connected with described Spindle Motor; the center of gravity of the center of gravity of evener and CD has reduced the revolution of the described turning axle of the described Spindle Motor that the off-centre owing to the CD center of gravity causes with respect to described turning axle opposite one another during CD rotation.
2. according to the described CD player of claim 1, it is characterized in that the dynamic annular flat weighing apparatus of described self-compensation type has a pair of be enclosed within on the described turning axle and can be around the ring of described turning axle motion at least.
3. according to the described CD player of claim 2, it is characterized in that the dynamic annular flat weighing apparatus of described self-compensation type also comprises a protecting component that is connected with described turning axle, contact with described stator or described base plate to prevent described ring.
4. according to the described CD player of claim 1, it is characterized in that the dynamic annular flat weighing apparatus of described self-compensation type comprises:
At least one pair of is enclosed within also can be around the ring of rotor motion on the described rotor; And
Being used for of being connected with described rotor supported described ring and prevented the protecting component that described ring throws away from described rotor.
5. according to the described CD player of arbitrary claim in the claim 1 to 4, it is characterized in that the dynamic annular flat weighing apparatus of described self-compensation type is not by can making by oxidized material, and can not be corroded.
6. according to the described CD player of claim 5, it is characterized in that the dynamic annular flat weighing apparatus of described self-compensation type is to use SUS300, a kind of material of choosing in this group material of pottery and synthetic resin is made.
7. according to the described CD player of arbitrary claim in the claim 1 to 4, it is characterized in that the dynamic annular flat weighing apparatus of described self-compensation type is coated with anti-oxidant coating on its outer surface.
8. according to the described CD player of claim 7, it is characterized in that the described material that anti-oxidant coating arranged can be selected for use with carbon steel or chromium steel and be substrate and plate zinc or nickel chromium triangle coating.
CN98103853A 1997-02-17 1998-02-12 Disk player Expired - Fee Related CN1081379C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019970004766A KR100219630B1 (en) 1997-02-17 1997-02-17 Disk player
KR4766/97 1997-02-17

Publications (2)

Publication Number Publication Date
CN1191367A CN1191367A (en) 1998-08-26
CN1081379C true CN1081379C (en) 2002-03-20

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CN98103853A Expired - Fee Related CN1081379C (en) 1997-02-17 1998-02-12 Disk player

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100357479B1 (en) * 2000-06-07 2002-10-19 주식회사 하이소닉 Vibration reduction device of turntable
KR20030067313A (en) * 2002-02-08 2003-08-14 삼성전자주식회사 Disk clamper providing dynamic balancing function and disk player adopted the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203303A (en) * 1978-07-28 1980-05-20 The United States Of America As Represented By The United States Department Of Energy Torque-balanced vibrationless rotary coupling
US5422776A (en) * 1993-12-27 1995-06-06 Maxtor Corporation Improvement in a magnetic disk drive for balancing a disk pack assembly
JPH08135735A (en) * 1994-11-10 1996-05-31 Aiwa Co Ltd Damper device
US5537272A (en) * 1994-05-02 1996-07-16 Seagate Technology, Inc. Spindle balance device for a hard disk drive assembly
US5555144A (en) * 1995-01-12 1996-09-10 Seagate Technology, Inc. Balancing system for a disc drive disc assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203303A (en) * 1978-07-28 1980-05-20 The United States Of America As Represented By The United States Department Of Energy Torque-balanced vibrationless rotary coupling
US5422776A (en) * 1993-12-27 1995-06-06 Maxtor Corporation Improvement in a magnetic disk drive for balancing a disk pack assembly
US5537272A (en) * 1994-05-02 1996-07-16 Seagate Technology, Inc. Spindle balance device for a hard disk drive assembly
JPH08135735A (en) * 1994-11-10 1996-05-31 Aiwa Co Ltd Damper device
US5555144A (en) * 1995-01-12 1996-09-10 Seagate Technology, Inc. Balancing system for a disc drive disc assembly

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Publication number Publication date
KR19980068255A (en) 1998-10-15
CN1191367A (en) 1998-08-26
KR100219630B1 (en) 1999-09-01

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