CN1395731A - Disk tray moving device and disk recording and/or reproducing device - Google Patents

Disk tray moving device and disk recording and/or reproducing device Download PDF

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Publication number
CN1395731A
CN1395731A CN 01803932 CN01803932A CN1395731A CN 1395731 A CN1395731 A CN 1395731A CN 01803932 CN01803932 CN 01803932 CN 01803932 A CN01803932 A CN 01803932A CN 1395731 A CN1395731 A CN 1395731A
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CN
China
Prior art keywords
tooth
central gear
holder
planet wheel
gear
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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.)
Pending
Application number
CN 01803932
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Chinese (zh)
Inventor
水野�一
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Sony Corp
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Sony Corp
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Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of CN1395731A publication Critical patent/CN1395731A/en
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/22—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from random access magazine of disc records
    • G11B17/226—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from random access magazine of disc records the magazine consisting of a single rotatable tray carrying the disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/04—Feeding or guiding single record carrier to or from transducer unit
    • G11B17/05—Feeding or guiding single record carrier to or from transducer unit specially adapted for discs not contained within cartridges
    • G11B17/051—Direct insertion, i.e. without external loading means
    • G11B17/0515—Direct insertion, i.e. without external loading means adapted for discs of different sizes

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  • Automatic Disk Changers (AREA)
  • Feeding And Guiding Record Carriers (AREA)

Abstract

The present invention provides a disc tray shift device including a disc tray having at least one disc placement portion, a rack having an arc portion and at least one straight portion, the rack being arranged on the disc tray, and a sun gear, a planet gear which has a large-tooth-portion engaged with the sun gear and a small-tooth-portion engaged with the rack, and a shift mechanism for shifting the disc tray between a position where the disc placement portion is withdrawn externally and a position where the disc placement portion is housed internally, wherein teeth of at least one of the sun gear, the planet gear, and the rack are profile-shifted.

Description

CD holder shift unit and video disc recording and/or replay device
Technical field
The present invention relates to the CD holder shift unit that a use has a central gear and a planetary gear mechanism, and video disc recording and/or replay device with this CD holder shift unit.
Background technology
From traditionally, people have used to be used to reset and have been recorded in the various Disc players of the information on the CD-ROM and are used to record information to recording type optical disc and reset the various Disc players of the information on it that is recorded in.A kind of like this Disc player comprises a CD holder, many CDs are placed thereon so that load, and a carriage shift mechanism, be used for the body interior of CD holder from Disc player shifted out, perhaps CD holder is moved into the main body of Disc player from the outside.
CD holder has first type surface, is provided with the groove of a plurality of placement CDs on it, many CDs can be inserted wherein.In Disc player, CD holder is arranged like this, make it can insert/move between extracting position and the replay position, preceding a kind of position is used for CD is inserted CD holder/take out from CD holder, a kind of position, back information on the CD of being recorded in that is used to reset.
The carriage shift mechanism comprises a planetary gears in order to the moving CD carriage, and the driving mechanism in order to driving or rotation planetary gears.
As shown in Figure 1, the planetary gears of the routine of carriage shift mechanism comprises a central gear that is driven or rotated by driving mechanism 201, the planet wheel 202 of following central gear 201 to be meshed, and interior tooth bar 203 that is essentially the U font, side has formed many teeth within it, and is meshed with planet wheel 202.
Central gear 201 heart therein has a pivot 205, when a motor (not shown) by driving mechanism drives or during rotation pivot 205, it is just around pivot 205 rotations.
Planet wheel 202 heart therein has a pivot 206, also has a canine tooth part 207 that is meshed with central gear 201, and a little toothed portion 208, and its pitch circle is less than the pitch circle of canine tooth part 207, and is meshed with interior tooth bar 203.
Interior tooth bar 203 is integrally formed around the rear end of CD holder, and is meshed with the little toothed portion 208 of planet wheel 202.
CD holder has a guide groove 211, the inboard of tooth bar 203 in entering in order to guiding planet wheel 202, and move along interior tooth bar, therein, pivot 206 is movably settled.In other words, the revolution of planet wheel 202 operation is under the help of guide groove 211, and its little toothed portion 208 is meshed with interior tooth bar 203.
In the planetary gears 200 of so configuration, when driving mechanism made central gear 201 rotations, the canine tooth part 207 of planet wheel 202 is rotation thereupon also.When the canine tooth part 207 of planet wheel 202 was rotated, the little toothed portion 208 of planet wheel 202 meanwhile, also made planet wheel 202 around central gear 201 rotations also along interior tooth bar 203 rotations, and pivot 205 is its revolution center.
So, in planetary gears 200, when little toothed portion 208 rotation of planet wheel 202, interior tooth bar 203 just is moved, and the CD holder that causes thus having interior tooth bar 203 inserting/is moved between extracting position and the replay position.
In general, in a gear mechanism, under the situation of the gear that use is formed from a resin, the distance between the center of circle of intermeshing a pair of gear is designed to bigger a little than the pitch radius sum of each gear.This be for tackle and avoid such as since between the center of established gear the negative value error that may occur or gear expand interference kill between each gear because of being heated.
On the other hand, in the conventional planetary gears 200 of carriage shift mechanism, the center of the circular arc portion of interior tooth bar 203 overlaps with the center of central gear 201, and is aligned on straight line l, as shown in Figure 1 between each meshing point between each gear.Therefore, as supposition r 3Pitch radius, r for central gear 201 4Be the pitch radius of planet wheel 202, and λ is during for predetermined gap, is difficult to design central gear 201 and planet wheel 202 makes the distances between the center of circle of each gear be set to (r 3+ r 4+ λ), that is, and by predetermined gap lambda is followed r 3With r 4The sum addition is so that preparation has appropriate gap or gear at interval, required modulus or the required number of teeth, as shown in Figure 2.
In the process of each gear for preparing planetary gears 200, when the design modulus or the number of teeth, the simplest method is exactly the pitch radius sum that the distance of order between the center of circle of central gear 201 and planet wheel 202 equals each gear.
Yet, actually, under the situation that can not guarantee predetermined gap λ, because the slight variation of conditioned disjunction environment will cause such as the appearance of killing such class interference problem between each gear.
And, in planetary gears 200, require to have enough in the finite space of the main body that each gear of modulus greatly is arranged at Disc player.
Summary of the invention
Correspondingly, a target of the present invention is exactly, by providing a CD holder shift unit to overcome the above-mentioned shortcoming of prior art, this CD holder shift unit uses a kind of undersized gear mechanism, the interference that it can avoid intermeshed gear to occur in rotation, and the improvement reliability of operation, video disc recording and/or replay device with CD holder shift unit are provided simultaneously.
By a CD holder shift unit is provided, just can reach above-mentioned target, this CD holder shift unit comprises having the CD holder that at least one CD holder divides, one toothed rack, it has a circular arc portion and at least one straight line portion, this tooth bar is set on the CD holder, and central gear, a planet wheel, the latter has a canine tooth part that is meshed with central gear, and a little toothed portion that meshes with tooth bar, and a shift mechanism, be used to make CD holder CD holder being divided outwards extraction or the CD holder branch is inwardly being packed into mobile between these two positions, wherein, central gear, in the middle of planet wheel and the tooth bar, the tooth profile displacement takes place in one of them at least.
Equally, by a gear mechanism is provided, also can reach above-mentioned target, this gear mechanism comprises a central gear, at least one planet wheel, the canine tooth part that it has a little toothed portion and is meshed with central gear, little toothed portion and canine tooth part are integrally driven, and a toothed rack, when central gear is driven, in order to drive planet wheel, make it around the central gear revolution this tooth bar and the engagement of little toothed portion, wherein, central gear, in the middle of planet wheel and the tooth bar, the tooth and hair population shape profile of one of them displacement at least.
Equally, by a video disc recording and/or replay device are provided, also can reach above-mentioned target, this video disc recording and/or replay device comprise having the CD holder that at least one CD holder divides, one is write down and/or playback unit, be used to record information to a CD that is placed on the CD holder branch, and/or from this cd-rom playback information, one toothed rack, it has a circular arc portion and at least one straight line portion, this tooth bar is set on the CD holder, and central gear, a planet wheel, the latter has a canine tooth part that is meshed with central gear, and little toothed portion that meshes with tooth bar, and shift mechanism, be used to make CD holder between two kinds of positions, to move, on preceding a kind of position, the CD that is placed on the CD holder branch is replaceable, on a back position, and can be to cd-rom recording of information and/or from this cd-rom playback information, wherein, central gear, in the middle of planet wheel and the tooth bar, the tooth and hair population shape profile of one of them displacement at least.
Distance between the center of central gear and canine tooth part is set to (r 1+ r 2), and between each pitch circle of central gear and canine tooth part, guaranteeing has a predetermined gap lambda, here, and (r 1+ r 2) be the pitch radius of central gear, the pitch radius of canine tooth part, and predetermined gap lambda sum.
The pitch radius of central gear is set to (r 1-x λ), the pitch radius of canine tooth part then is set to { r 2-(1-x) λ }, here, x is a predetermined coefficient.
About each detailed description of preferred embodiment of the present invention, will make these targets of the present invention and other targets, feature and advantage become more obvious by following.
Description of drawings
Fig. 1 represents a planimetric map of conventional planetary gears.
Fig. 2 represents a planimetric map, in order to the distance between the center that each gear between planetary gears shown in Figure 1 is described.
Fig. 3 represents a skeleton view according to a Disc player of the present invention.
Fig. 4 represents to be used for a skeleton view of a CD holder of Disc player.
Fig. 5 represents to be used for a planimetric map of the carriage shift mechanism of moving CD carriage.
Fig. 6 represents to be arranged at a planimetric map of a central gear in the carriage shift mechanism, a planet wheel and an interior tooth bar.
Fig. 7 represents a planimetric map of carriage shift mechanism, and wherein, slipper bracket is along arrow A 2Direction move.
Fig. 8 represents a planimetric map of carriage shift mechanism, wherein, and playback information from the CD.
Fig. 9 represents a planimetric map of carriage shift mechanism, and wherein, slipper bracket is along arrow A 2Direction move, carry out the replay operations of CD simultaneously.
Figure 10 represents a planimetric map, in order to the distance of explanation between central gear and planetary each center.
Figure 11 A and 11B represent two parts of planimetric maps, in order to the engagement of explanation between planetary little toothed portion and interior tooth bar, wherein, Figure 11 A represents that the situation of tooth profile displacement does not take place each tooth, and Figure 11 B then represents the situation of each tooth and hair population shape profile displacement.
Figure 12 represents a planimetric map according to another example of planetary gears of the present invention.
Embodiment
With reference to all accompanying drawings, be illustrated further using Disc player of the present invention below with regard to best mode.
Disc player 1 according to the present invention comprises that 11, one slipper brackets 12 of CD holder of placing many CDs 5 are thereon supporting 11, one carriage shift mechanisms 13 of CD holder with rotation mode, in order to along arrow A 1And A 2Direction move slipper bracket 12, and carriage rotary drive mechanism 14 is used for driving or rotating disc carriage 11, as shown in Figure 3 and Figure 4.
Disc player 1 comprises a CD rotary drive mechanism 15, in order to drive or rotating disc 5, a playback mechanism 16, the information on the CD 5 of being recorded in is used to reset, a clamping device 17 is used for 5, one bearings 18 of rotation mode chucking optical disk, be used for 16, one substrates 19 of supporting CD rotary drive mechanism 15 and playback mechanism.Be used to support clamping device 17 and bearing 18, and a hinge mechanism 20, be used to order about bearing 18 convergences or away from clamping device 17, as shown in Figure 4 and Figure 5.
CD holder 11 is disc basically, and is supported with rotation mode by slipper bracket 12, and its turning axle 24 is exactly its rotation center, as shown in Figure 4.CD holder 11 has a first type surface, is provided with a plurality of CDs on it and places groove 26, and many CDs 5 are placed into wherein along its periphery.
Each CD is placed groove 26 and all is provided with an opening 27, with so that CD rotary drive mechanism 15 towards a center pit of CD 5, so that drive CD 5.Opening 27 has a polarizing slot 28, is positioned CD rotary drive mechanism 15 in order to CD is placed groove 26.CD is placed groove 26 opening 29, is used to make playback mechanism 16 towards CD 5, so that playback of recorded information thereon, opening 29 is stretched over the periphery of CD holder 11 from opening 27.
Slipper bracket 12 is made of resin, and is essentially rectangle, and has a carriage to place groove 31 on its first type surface, and CD holder 11 is placed into wherein with rotation mode, as shown in Figure 4.Slipper bracket 12 has one to be parallel to direction A in the one side 1And A 2Guide member 32.Slipper bracket 12 allows a guide rail (not shown) that guide member 32 is positioned, and above-mentioned guide rail is installed in the substrate 19, makes slipper bracket 12 along direction A 1And A 2Slide.
Carriage shift mechanism 13 comprises a planetary gears 35, with so that slipper bracket 12 along direction A 1And A 2Move, also comprise a driving mechanism 36, in order to drive or to rotate planetary gears 35, as Fig. 3, Fig. 4 and shown in Figure 5.
As shown in Figure 5 and Figure 6, planetary gears 35 comprises a central gear 41, drive or make its rotation by driving mechanism 36, a planet wheel 42, it meshes with central gear 41, and is driven by the latter, and an interior tooth bar 43 that is essentially the U font, the tooth of tooth bar is located at its inboard, and is meshed with planet wheel 42.
Central gear 41 is formed from a resin, and heart position integrally forms a pivot 45 therein, and this pivot 45 is arranged on the substrate 19, and allowing central gear 41 is that rotation center is rotated with pivot 45, as shown in Figure 6.When driving mechanism 36 makes pivot 45 rotations, just drive central gear 41 around pivot 45 rotations.
Planet wheel 42 is formed from a resin, and heart position integrally forms a pivot 46 therein, as shown in Figure 6.Planet wheel 42 has a canine tooth part 47 that is meshed with central gear 41, and a little toothed portion 48 that is meshed with interior tooth bar 43, and the pitch circle of little toothed portion 48 is less than the pitch circle of canine tooth part 47.
Rear end around slipper bracket 12, tooth bar 43 in integrally forming, and have straight track portion parallel to each other and divide 51,52 and circular arc rail part 53, its two ends are connected to straight track portion and divide each end of 51,52, thereby form a continuous rail part, as shown in Figure 5 and Figure 6.The straight track portion of interior tooth bar 43 divides 51,52 to be formed like this, makes it be parallel to the moving direction of slipper bracket 12.The straight track portion that is positioned at the right side divides 52, and divide than the straight track portion that is positioned at the left side 51 must be long, and each straight track portion divides 51,52 rear ends that extend to slipper bracket 12, and straight track portion divides 52 to divide 51 to extend longerly slightly than straight track portion, as shown in Figure 5.
Slipper bracket 12 is provided with a guide groove 55, is used to guide planet wheel 42 to enter the inboard of interior tooth bar 43 and also leans on mutually with it, and pivot 46 movably is installed among the interior tooth bar.In other words, the revolution of planet wheel 42 operation is under the help of guide groove 55, and its little toothed portion 48 is meshed with interior tooth bar 43.
The planetary gears 35 of carriage shift mechanism 13 comes mobile slipper bracket 12 like this, make CD holder 11 insert/move between extracting position and the replay position, on previous position, CD 5 is inserted CD holder 11 or take out from CD holder 11, on a back position, by means of central gear 41 and planet wheel 42, the information on the CD 5 of being recorded in of resetting.
The driving mechanism 36 of carriage shift mechanism 13 comprises a large pulley 76, in order to drive the central gear 41 of planetary gears 35, a small sheave 77, in order to drive large pulley 76, one extends two belts 78 between the pulley, is sent to large pulley 76 in order to the driving force (square) with small sheave 77, and a motor 79, in order to drive or to rotate small sheave 77, as shown in Figure 5.
Large pulley 76 is fixed on the pivot 45 of central gear 41.Motor 79 is installed on the substrate 19, and small sheave 77 is fixed on the turning axle 80 of motor 79.So, in driving mechanism 36, when motor 79 drives or rotate small sheave 77, by means of small sheave 77, large pulley 76, and extend therebetween belt 78, will the central gear 41 of planetary gears 35 be activated.
Carriage rotary drive mechanism 14 is installed in the bottom of slipper bracket 12, and comprise a turning axle 24, be used for 11, one gear (not shown) that are meshed with turning axle 24 of rotation mode chucking optical disk carriage, and a motor 25 that is used to drive or rotate this gear, as shown in Figure 4.Carriage rotary drive mechanism 14 drives or rotates at carriage places the CD holder 11 that is supported by slipper bracket 12 in the groove 31, so that a required CD is placed the front that groove 26 re-positions at slipper bracket 12, this will help that CD 5 inserted CD holder 11 or from CD holder 11 with its taking-up.Subsequently, carriage rotary drive mechanism 14 will be placed on each CD and place one of them CD 5 of groove 21 and re-position between between CD rotary drive mechanism 15 and the playback mechanism 16 or on the position of facing with it.
CD rotary drive mechanism 15 comprises a CD platform 81, waits to insert for the CD 5 that loads to be placed on it, comprises that also one one is used to drive or the spindle motor 82 of rotating disc platform 81, as shown in Figure 5.CD platform 81 is essentially cylindrical, and is made by the metal with magnetic.CD platform 81 has a CD holder spare that allows CD 5 flange dish type placed on it on the periphery of an one cylinder-shaped end.Equally, on same cylinder-shaped end, CD platform 81 has one to be essentially columniform meshing part 84 on week within it, and it prepares to be meshed with the center pit of CD 5.Spindle motor 82 has a spindle oblique crank Z 85, and the fixing disc platform 81 thereon, and spindle oblique crank Z 85 runs through CD platform 81.One end of spindle oblique crank Z 85 is outwards outstanding from the end face of the meshing part 84 of CD platform 81.
Playback mechanism 16 comprises that an optics detects 88, is recorded in information above the CD 5 in order to playback, and a shift mechanism 89, detects 88 radial direction along CD 5 and moves in order to order about optics, as shown in Figure 5.Optics detects 88 and comprises an optical unit, it has object lens, is used to make laser beam to focus on the recording surface of CD 5, and a lens shift unit, be used for driving or mobile object lens, make it respectively along being parallel to and moving perpendicular to the direction of its optical axis.Shift mechanism 89 has a substrate, detects 88 in order to support optics, also has several guide shafts, in order to the location substrate, make substrate to move along the radial direction of CD 5, and a threaded motor (thread motor) (not shown), in order to substrate is driven.
Clamping device 17 comprises a hold assembly 91, and it is with 5, discoidal grip blocks 92 of rotation mode chucking optical disk, in order to pressing close to CD 5, and a motion arm 93, in order to order about hold assembly 91 convergences and away from CD platform 81, as shown in Figure 5.Hold assembly 91 is essentially cylindrical, and is provided with grip block 92 in the periphery towards a cylinder-shaped end of CD platform 81.Motion arm 93 is positioned hold assembly 91 for its end, and being that middle position is provided with the pivot (not shown) basically along its length direction, is positioned by 19 pairs of pivots of substrate, and allows motion arm 93 to rotate up and down.
Bearing 18 is essentially pane shape, and CD rotary drive mechanism 15 and playback mechanism 16 be placed on the first type surface of bearing 18 like this, makes the two respectively towards clamping device 17, as shown in Figure 5.Bearing 18 is provided with pivot 97, at the one end, by substrate 19 it is positioned, and allows bearing 18 to rotate up and down.At same end, bearing 18 is provided with a functional unit (not shown), in order to the motion arm 93 of operation clamping device 17, clamping device 17 by integrally with extend ground and form towards the bottom of motion arm 93.
Bearing 18 is provided with a meshing part 98 at its other end, and it is meshed with hinge mechanism 20, as shown in Figure 5.And, order about bearing 18 by hinge mechanism 20 via meshing part 98 and rotate up and down.Bearing 18 is provided with a locating shaft 99 on its first type surface, when locating shaft 99 followed the polarizing slot 28 of each CD placement groove 26 on the CD holder 11 to be meshed, the CD 5 that it just will be placed on each CD placement groove 26 navigated on the CD platform 81.So, being placed on the CD of being placed on groove 26 by each CD on the CD holder 11 of 14 drivings of carriage rotary drive mechanism or rotation 5 just is positioned on the CD platform 81.
The cross section of substrate 19 is essentially U font (not shown), and a main basal base 101 is arranged, and in order to support slipper bracket 12 slidably, makes it along direction A 1And A 2Slide, 102 pairs of pivots 97 of rear parts position, so that allow bearing 18 to rotate up and down, and the top board parts 103 that pivot is positioned, it allows motion arm 93 to rotate up and down, as shown in Figure 4 and Figure 5.The main basal base 101 of substrate 19 is provided with an opening (not shown), and therein, bearing 18 is arranged like this, makes it to rotate up and down [1].
Hinge mechanism 20 comprises a cam 110, rotate up and down in order to order about bearing 18, and idle pulley 111, in order to rotating cam 110, and interlocking axle 112, it is set on the pivot 45 of central gear 41 of planetary gears 35, and hinge mechanism 20 is interlocked with carriage shift mechanism 13, as shown in Figure 5.Hinge mechanism 20 also comprises a rotary encoder 117, is installed in the revolution angle of the planet wheel 42 on the pivot 45 of central gear 41 in order to detection.When planet wheel 42 revolved round the sun operation, rotary encoder 117 rotated simultaneously, just can detect the state of the shifting function of slipper bracket 12 thus.
Cam 110 is placed on the substrate 19 like this, makes it to also have a cam path (not shown), in order to move the meshing part 98 of the periphery that is positioned at bearing 18 around pivot 113 rotations as rotation center.When cam 110 rotation,, bearing 18 is rotated along convergence or away from the direction of the hold assembly 91 of clamping device 17 by means of the meshing part 98 that is installed among the cam path.In other words, when bearing 18 upwards rotates, be placed on CD 5 on the CD platform 81 by grip block 92 clampings of CD platform 81 and hold assembly 91.Equally, when bearing 18 rotated, the clamp position of the CD 5 of grip block 92 clampings of CD platform 81 and hold assembly 91 was released.
Idle pulley 111 is so mounted on the substrate 19, makes it around pivot 114 rotations as its rotation center, and makes its periphery come in contact with the periphery of cam 110.
Below, be used to make slipper bracket 12 along direction A with reference to all accompanying drawing explanations 1And A 2The running of the carriage shift mechanism 13 of the Disc player 1 that moves.
In carriage shift mechanism 13, the slipper bracket 12 that is shown in Fig. 5 is along direction A 1And A 2After moving, just taken in Disc player 1, prepared to be positioned replay position.In this state, on the leftward position at the center of the curved track part 53 of tooth bar 43, its little toothed portion 48 was with interior tooth bar 43 engagements, as shown in Figure 5 in the planet wheel 42 of planetary gears 35 was located in.Equally, in this state, be positioned in playback mechanism 16 on the bearing 18 and CD rotary drive mechanism 15 and all be located on the position away from slipper bracket 12.
When motor 79 drives or during the small sheave 77 of rotating drive mechanism 36 in a clockwise direction, by belt 78 large pulley 76 is rotated, this belt is sent to large pulley 76 with the driving force (square) of small sheave 77, make central gear 41 rotate in a clockwise direction thus,, revolve round the sun around central gear 41 in a clockwise direction from a position shown in Figure 5 with seasonal planet wheel 42 along the curved track part 53 of interior tooth bar 43.Subsequently, in planet wheel 42 is moved to the straight track portion of tooth bar 43 divide 51 with the tie point place of curved track part 53, prepare to divide 51 to be meshed with straight track portion.After the straight track portion of planet wheel 42 and interior tooth bar 43 divided 51 engagements, the revolving force of planet wheel 42 (square) divided 51 with regard to the straight track portion of tooth bar 43 in being sent to, and planet wheel 42 then rests on same position, makes slipper bracket 12 along direction A thus 2Move.
Then, the straight track portion of interior tooth bar 43 divides 51 to move to planet wheel 42, and as shown in Figure 7, therefore, slipper bracket 12 just is drawn out of, and prepares to be positioned to insert/extracting position.So, in this state, the part that the CD that is equipped with the CD holder 11 of each CD 5 is thereon placed groove 26 is drawn out of from Disc player 1, thus, in the rotation of CD holder 11, with the operation that takes place CD is inserted CD holder 11 or taken out CD from CD holder 11, as shown in Figure 3.
Insert when slipper bracket 12 is located in/during extracting position, CD rotary drive mechanism 15 and playback mechanism 16 all are located on the position away from CD holder 11.
Then, drive with counter-clockwise direction or during the small sheave 77 of rotating drive mechanism 36, make slipper bracket 12 when motor 79 along direction A 1Move, prepare to take in Disc player 1 the inside.When slipper bracket 12 is located in replay position, it is 51 close with the tie point and the planet wheel 42 of curved track part 53 that the straight track portion of interior tooth bar 43 divides, and planet wheel 42 divides 51 to be moved to curved track part 53 from straight track portion, subsequently, make planet wheel 42 revolve round the sun around central gear 41 with counter-clockwise direction, as shown in Figure 5 along the curved track part 53 of interior tooth bar 43.
When planet wheel 42 was actuated to counter-clockwise direction and revolves round the sun, the interlocking axle 112 of hinge mechanism 20 was along with the revolution action of planet wheel 42 and rotate.At this moment, the revolving force of interlocking axle 112 (square) is sent to cam 110 via idle pulley 111, makes cam 110 rotations.
When the cam 110 of hinge mechanism 20 was driven and rotates, the meshing part of bearing 18 98 was moved along cam path.And on the right positions at the center of the curved track part 53 of tooth bar 43 time, as shown in Figure 8, the pivot 97 that bearing 18 is just ordered about around as its rotation center upwards rotates in planet wheel 42 is located in.Then, CD 5 just is placed on the CD platform 81 of CD rotary drive mechanism 15, and subsequently, the grip block 92 of CD platform 81 and hold assembly 91 just clamps CD 5 with rotation mode, in this state, the information on the CD 5 of being recorded in of just resetting.
At this moment, the rotary encoder 117 of rotation detects the displacement duty of slipper bracket 12 and the clamping duty of CD 5 by hinge mechanism 20 along with the revolution action of planet wheel 42.When planet wheel 42 entered position shown in Figure 8, the driving or the rotary manipulation of the motor 79 of driving mechanism 36 just were suspended.
Then, the optics of ream weight laying mechanism 16 detects 88 radial direction along CD 5 and moves, and is recorded in the information on the CD 5 thus with regard to resetting.
And, during information on playback is recorded in CD 5, slipper bracket 12 might be moved to and insert/extracting position, so that replace CD 5 with other CD.
In other words, in the process of the information on playback is recorded in CD 5, when motor 79 drives with counter-clockwise direction or during the small sheave 77 of rotating drive mechanism 36, the planet wheel 42 just curved track part 53 from a position shown in Figure 8 along interior tooth bar 43 revolves round the sun around central gear 41 with counter-clockwise direction.Subsequently, in planet wheel 42 is moved to the straight track portion of tooth bar 43 divide 52 with the tie point place of curved track part 53, prepare to divide 52 to be meshed with straight track portion.
After the straight track portion of planet wheel 42 and interior tooth bar 43 divided 52 engagements, the revolving force of planet wheel 42 (square) divided 52 with regard to the straight track portion of tooth bar 43 in being sent to, and planet wheel 42 then rests on same position, makes slipper bracket 12 along direction A thus 2Move.
Then, the straight track portion of interior tooth bar 43 divides an end of 52 to move to planet wheel 42, and as shown in Figure 9, therefore, slipper bracket 12 just is drawn out of, and prepares to be positioned to insert/extracting position.Therefore, the CD holder of having placed the CD holder 11 of CD 5 thereon divides 26 just to be drawn out of from Disc player 1.In this case, because straight track portion divides 52 to be made into to divide 51 length than straight track portion, make slipper bracket 12 along direction A 2The distance that moves is more longer a little than situation shown in Figure 7, in Fig. 7, does not carry out replay operations.
In other words, make slipper bracket 12 along direction A 2The distance that moves is longer a little, and make and replacing with other CDs in the process of the CD 5 on the CD holder 11, when carriage rotary drive mechanism 14 makes CD holder 11 rotations on the slipper bracket 12, the replay operations of CD holder 11 unlikely obstruction CDs 5.
In the planetary gears 35 of carriage shift mechanism 13, the distance between the canine tooth part 47 of central gear 41 and planet wheel 42 is set to (r 1+ r 2), and between the pitch circle of the canine tooth part 47 of central gear 41 and planet wheel 42, guaranteeing has a predetermined gap lambda, here, and (r 1+ r 2) be the pitch radius of canine tooth part 47 of pitch radius, planet wheel 42 of central gear 41 and predetermined gap lambda sum, as shown in figure 10.In planetary gears 35, the tooth of the canine tooth part 47 of the tooth of central gear 41 and planet wheel 42 carries out the displacement of tooth profile negative sense according to a predetermined numerical value.
In other words, in planetary gears 35, the distance between the center of the canine tooth part 47 of central gear 41 and planet wheel 42 is set to (r 1+ r 2), so that the predetermined gap lambda of assurance between the pitch circle of the canine tooth part 47 of central gear 41 and planet wheel 42, the pitch radius of central gear 41 is set to (r 1-x λ), the pitch radius of the canine tooth part 47 of planet wheel 42 then is set to { r 2-(1-x) λ }, here, x is a predetermined coefficient.
In planetary gears 35, one of them generation tooth profile negative sense of the tooth of the tooth of the little toothed portion 48 of planet wheel 42 or interior tooth bar 43 is shifted or tooth profile forward shift at least.Illustrate between the little toothed portion 48 of planet wheel 42 and the engagement between the interior tooth bar 43 with reference to all accompanying drawings below.
Do not take place under the situation of tooth profile displacement at the tooth of the little toothed portion 48 of planet wheel 42 or the tooth of interior tooth bar 43, because they interfere with each other and occur easily killing, thus be worthless between the engagement between them, shown in Figure 11 A.In other words, because the number of teeth of little toothed portion 48 is less than the number of teeth of interior tooth bar 43, so between the little toothed portion 48 of planet wheel 42 and interior tooth bar 43, interfere with each other.
On the other hand, under the tooth of the tooth of the little toothed portion 48 of planet wheel 42 and the interior tooth bar 43 numerical value generation tooth profile negative sense displacement situation predetermined according to one, internal tooth disturbs or involute urve disturbs owing to got rid of, thus the interference between each gear avoided, shown in Figure 11 B.In this embodiment, the displacement of the tooth and hair population shape profile negative sense of the little toothed portion 48 of planet wheel 42, the tooth profile forward shift then takes place in the tooth of interior tooth bar 43.
So, in planetary gears 35, because the tooth and hair of the tooth of central gear 41 and the canine tooth part 47 of planet wheel 42 has been given birth to the tooth profile displacement, so the engagement between the canine tooth part 47 of central gear 41 and planet wheel 42 is improved.Therefore, just can avoid because (installation) error of gear centre and, thereby improve reliability of operation fully because of the interference of killing of causing of expanded by heating and so on.
In the planetary gears 35 of above-mentioned carriage shift mechanism 13, the tooth and hair of the canine tooth part 47 of the tooth of central gear 41 and planet wheel 42 has been given birth to the displacement of tooth profile negative sense.And, also might make the tooth and hair population shape profile negative sense displacement of the little toothed portion 48 of planet wheel 42, the tooth profile forward shift then takes place in the tooth of interior tooth bar 43.
In planetary gears 35, the displacement of the tooth and hair population shape profile negative sense of the tooth of central gear 41 and planet wheel 42.On the other hand, the tooth profile displacement can take place in the tooth of central gear and a plurality of planetary tooth in another planetary gears.
For example, as shown in figure 12, another planetary gears 60 comprises a central gear 61, one the 1st planet wheel 62 and one the 2nd planet wheel 63 with central gear 61 engagements, and internal-gear 64, its tooth is located at its inboard, and is meshed with the 1st planet wheel 62 and the 2nd planet wheel 63.
Central gear 61 is arranged like this, makes it around as the pivot 66 of rotation center and rotate.The 1st planet wheel 62 heart position therein has 67, one canine tooth parts 71 of a pivot, and a little toothed portion 72, and the latter's pitch circle is less than the pitch circle of canine tooth part 71, as shown in figure 12.Equally, the 2nd planet wheel 63 heart position therein has 68, one canine tooth parts 73 of a pivot, and a little toothed portion 74, and the latter's pitch circle is less than the pitch circle of canine tooth part 73.The rotation center of internal-gear 64 overlaps with the rotation center of central gear 61.
In planetary gears 60, the tooth of central gear 61, the tooth and hair population shape profile negative sense displacement of the canine tooth part 71,73 of the 1st and the 2nd planet wheel 62,63.Therefore, in the distance between the center of the canine tooth part 71 of central gear 61 and the 1st planet wheel 62, and in the distance between the center of the canine tooth part 73 of central gear 61 and the 2nd planet wheel 63, can both guarantee the gap of being scheduled to.And, in planetary gears 60, also might do like this: in the distance between the center of the little toothed portion 72 of the 1st planet wheel 62 and internal-gear 64, and in the distance between the center of the little toothed portion 74 of the 2nd planet wheel 63 and internal-gear 64, can both guarantee the gap be scheduled to, the little toothed portion 72 of the 1st and the 2nd planet wheel 62,63, the displacement of tooth profile negative sense all takes place in 74 tooth, and the tooth profile forward shift then takes place annular wheel gear 64.
In the planetary gears 60 of so configuration, when being driven by a motor (not shown) or rotating central gear 61, the canine tooth part 71,73 of the 1st and the 2nd planet wheel 62,63 is rotated thereupon.When canine tooth part 71,73 was rotated, the little toothed portion 72,74 of the 1st and the 2nd planet wheel 62,63 also rotated thereupon, and the while, revolves round the sun around central gear 61 as its revolution center with pivot 66.Then, internal-gear 64 is driven.
As mentioned above, according to Disc player 1 of the present invention, in the planetary gears 35 of carriage shift mechanism 13, the displacement of the tooth and hair population shape profile negative sense of the canine tooth part 47 of the tooth of central gear 41 and planet wheel 42.So, just can guarantee the gap between the pitch circle of the canine tooth part 47 of central gear 41 and planet wheel 42 fully, therefore, just can avoid the interference the killing between central gear 41 and planet wheel 42, thereby improve reliability of operation fully.
And the present invention is not limited to above-mentioned Disc player, and it can also be applied to use disc such as CD as the record and/or the replay device of information recording carrier.
Industrial applicability
As mentioned above, according to gear mechanism of the present invention, can avoid doing between each gear Disturb, thereby improved fully the reliability of moving. Therefore, CD holder displacement device and Video disc recording and/or replay device with CD holder displacement device just can dwindle size.
According to the CD holder displacement device that uses above-mentioned carriage shift mechanism, can avoid between each Interference between the gear. Therefore, just can improve fully the reliability of operation.

Claims (11)

1. a CD holder shift unit comprises:
Has the CD holder that at least one CD holder divides;
One toothed rack has a circular arc portion and at least one straight line portion, and this tooth bar is set on the CD holder; And
A central gear, a planet wheel, the latter has the canine tooth part and the little toothed portion that meshes with tooth bar that mesh with central gear, and a shift mechanism, be used to make CD holder CD holder being divided outwards extraction and the CD holder branch is inwardly being packed into mobile between these two positions;
Wherein, central gear, in the middle of planet wheel and the tooth bar, the tooth profile displacement takes place in one of them at least.
2. CD holder shift unit as claimed in claim 1, wherein, the displacement of tooth profile negative sense all takes place in the tooth of the tooth of central gear and canine tooth part.
3. CD holder shift unit as claimed in claim 1, wherein, the displacement of the tooth and hair population shape profile negative sense of little toothed portion, and the tooth and hair population shape profile forward shift of section of rack.
4. a gear mechanism comprises:
A central gear;
At least one planet wheel, it has a little toothed portion and a canine tooth part that is meshed with central gear, and little toothed portion and canine tooth part are integrally driven; And
One toothed rack when central gear is driven,, makes it around the central gear revolution this tooth bar and the engagement of little toothed portion in order to drive planet wheel;
Wherein, central gear, in the middle of planet wheel and the tooth bar, the tooth profile displacement takes place in one of them at least.
5. gear mechanism as claimed in claim 4, wherein, the tooth and hair population shape profile negative sense displacement of the tooth of central gear and canine tooth part.
6. gear mechanism as claimed in claim 4, wherein, the displacement of the tooth and hair population shape profile negative sense of little toothed portion, the tooth profile forward shift then takes place in the tooth of tooth bar.
7. video disc recording and/or replay device comprise:
Has the CD holder that at least one CD holder divides;
One is write down and/or playback unit, be used to record information to be placed on the CD that CD holder divides, and/or from this cd-rom playback information;
One toothed rack has a circular arc portion and at least one straight line portion, and this tooth bar is set on the CD holder; And
A central gear, a planet wheel, the latter has a canine tooth part that is meshed with central gear and a little toothed portion that meshes with tooth bar, and shift mechanism, be used to make CD holder to move between two kinds of positions, on previous position, the CD that is placed on the CD holder branch is replaceable, on a back position, to cd-rom recording of information and/or from cd-rom playback information;
Wherein, central gear, in the middle of planet wheel and the tooth bar, the tooth profile displacement takes place in one of them at least.
8. video disc recording as claimed in claim 7 and/or replay device, wherein, the displacement of tooth profile negative sense all takes place in the tooth of the tooth of central gear and canine tooth part.
9. video disc recording as claimed in claim 7 and/or replay device, wherein, the displacement of the tooth and hair population shape profile negative sense of little toothed portion, the tooth profile forward shift then takes place in the tooth of tooth bar.
10. video disc recording as claimed in claim 7 and/or replay device, wherein, the distance between the center of central gear and canine tooth part is set to (r 1+ r 2), and between the pitch circle of central gear and canine tooth part, guarantee to have a predetermined gap lambda, (r 1+ r 2) be the pitch radius of central gear, the pitch radius of canine tooth part, and predetermined gap lambda sum.
11. video disc recording as claimed in claim 10 and/or replay device, wherein, the pitch radius of central gear is set to (r 1-x λ), the pitch radius of canine tooth part then is set to { r 2-(1-x) λ }, here, x is a predetermined coefficient.
CN 01803932 2000-11-20 2001-11-14 Disk tray moving device and disk recording and/or reproducing device Pending CN1395731A (en)

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JP353549/2000 2000-11-20

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EP1312834A1 (en) * 2001-11-15 2003-05-21 Thomson Licensing S.A. Step movement mechanism
JP4922121B2 (en) 2007-10-11 2012-04-25 本田技研工業株式会社 Variable stroke engine

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JP3536338B2 (en) * 1994-02-25 2004-06-07 ソニー株式会社 Emergency eject mechanism for disk units
JP2000076764A (en) * 1998-08-28 2000-03-14 Sony Corp Disk loading device

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