WO2002041313A1

WO2002041313A1 - Disk tray moving device and disk recording and/or reproducing device

Info

Publication number: WO2002041313A1
Application number: PCT/JP2001/009958
Authority: WO
Inventors: Hajime Mizuno
Original assignee: Sony Corporation
Priority date: 2000-11-20
Filing date: 2001-11-14
Publication date: 2002-05-23
Also published as: JPWO2002041313A1; CN1395731A

Abstract

A disk tray moving device, comprising a disk tray having at least one disk loading part, a rack part having an arc part installed on the disk tray and at least one straight part, a sun gear and planetary gears having a gear part engaged with the sun gear and a pinion part engaged with the gear part and the rack part, and a moving mechanism for moving the disk tray between a position where the disk loading part is projected to the outside of the device and a position where the disk loading part is stored therein, wherein at least the tooth profile of one of the sun gear, planetary gears, and rack part is shifted.

Description

TECHNICAL FIELD The present invention relates to a disk tray moving device using a gear mechanism having a sun gear and a planetary gear, and a disk recording and / or reproducing device provided with the moving device. Or, it relates to a playback device. 2. Description of the Related Art Conventionally, a disk player that uses an optical disk such as a read-only optical disk or a recordable optical disk capable of recording and reproducing information as a recording medium has been used. Disc player of this type, a disk tray which the optical disc is placed, _c disc Torei that and a tray moving mechanism for transporting the disk tray with respect to the inner and outer side of the apparatus main body, on the main surface, There is provided a disk mounting recess on which the optical disk is mounted. The disc tray is movably provided between an attachment / detachment position where the optical disc can be inserted into / removed from the disc loading recess and a playback position where information is read from the optical disc placed in the disc loading recess and played back. Have been.

The tray moving mechanism has a planetary gear mechanism for transporting the disk tray, and a drive mechanism for driving the planetary gear mechanism.

As shown in FIG. 1, the planetary gear mechanism 200 provided in the tray moving mechanism includes a sun gear 201, which is rotationally driven by a drive mechanism, and a planetary gear 200, which is combined with the sun gear 201. And an internal gear rack 203 combined with the planetary gears 202.

The sun gear 200 has a rotating shaft 205 provided at the center thereof. The driving force is transmitted to the rotating shaft 205 by a motor (not shown) of the driving mechanism, so that the rotating shaft 205 is provided. It is driven to rotate together with 05.

The planetary gear 202 has a rotating shaft 206 at the center, and the sun gear 201 It has a large tooth portion 2107 to be combined and a small tooth portion 208 that has a smaller pitch circle than the large tooth portion 2107 and is combined with the internal tooth rack 203. .

The internal gear rack 203 is located at the rear end side of the disk tray, is formed in a substantially U-shape and is integrally formed, and the small tooth portion 208 of the planetary gear 202 is combined therewith. .

The rotating shaft 206 of the planetary gear 202 is movably engaged with the disk tray, and the small teeth portion 208 of the planetary gear 202 is engaged with the internal gear rack 203. The guide groove 211 for guiding the revolving motion is formed along the internal gear rack 203. In the planetary gear mechanism 200 configured as described above, the large tooth portion of the planetary gear 202 is rotationally driven by rotating the sun gear 201 by a driving mechanism (not shown). . In the planetary gear mechanism 200, the small tooth portion 208 of the planetary gear 202 is moved to the internal gear rack 203 as the large tooth portion 207 of the planetary gear 202 is rotationally driven. The planetary gear 202 is revolved around the rotation axis 205 of the sun gear 201 while being rotated along the axis.

Therefore, the planetary gear mechanism 200 moves the internal tooth rack 203 by rotating the small tooth portion 208 of the planetary gear 202, and moves the internal tooth rack 203. The provided disc tray is transported to a loading / unloading position and a playback position.

When the conventional planetary gear mechanism 200 provided in the above-described tray moving mechanism or the like uses gears formed of a resin material, generally, the center-to-center distance of a set of gears combined with each other is determined by the pitch of each gear. Set slightly larger than the sum of the circle radii. This is a measure to prevent an error in the minus direction in the center-to-center distance between the formed gears and to prevent interference such as tooth jamming between the gears due to thermal expansion of the gears.

However, in the conventional planetary gear mechanism 200, as shown in FIG. 1, the center of the arc-shaped portion of the internal gear rack 203 and the rotational center of the sun gear 201 coincide with each other, Are arranged in series on the straight line 1. Therefore, the planetary gear mechanism 2 0 0, as shown in FIG. 2, the pitch circle radius r ₃ of the sun gear 2 0 1, the sum of the pitch circle radius _{r 4} of the planetary gear 2 0 2, a predetermined gap By adding λ, the distance between pitch circles is (r ₃ + r ₄ +; i), and it is difficult to set the module and the number of teeth where each gear is properly vacant.

The planetary gear mechanism 200 has a center-to-center distance for convenience in setting the module and number of teeth. It is easiest to match the sum of the pitch circle radii of the gears.

However, the planetary gear mechanism 200 has a problem that if a predetermined gap λ is not secured at the center-to-center distance, interference such as tooth jamming between the gears may occur even with a slight change in conditions.

In addition, as a planetary gear mechanism, it is required that a module set a sufficiently large gear in a limited space in an apparatus main body such as a disc player. DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above situation, and it is possible to prevent interference between gears meshing with each other, improve operation reliability, and reduce the size. It is an object of the present invention to provide a gear mechanism capable of moving the disc and a device for moving the disc tray using the gear mechanism. Further, it is an object of the present invention to provide a recording and / or reproducing apparatus for a disc having the moving device. With the goal.

The present invention proposed to achieve the above object is a moving device for a disc tray, comprising: a disc tray having at least one disc mounting portion; and an arc portion provided on the disc tray. A disk portion comprising: a rack portion having at least one straight line; a sun gear; a large gear portion meshing with the sun gear; a planetary gear having a large gear portion and a small gear portion meshing with the rack portion; A moving mechanism for moving the tray between a position where the disk mounting portion protrudes outside the device and a position stored inside the device, wherein at least one of a sun gear, a planetary gear, and a rack portion; One tooth is dislocated.

The present invention is a useful gear mechanism used for a disc tray moving device, and includes a sun gear, a small gear portion, and a large gear portion that meshes with a sun gear. The small gear portion and the large gear portion At least one planetary gear that rotates with the body, and a rack part that meshes with the small gear part and is arranged so that the planetary gear revolves around the sun gear when the sun gear rotates. And at least one tooth of a sun gear, a planetary gear, and a rack is displaced.

Furthermore, the present invention relates to a disc recording and / or reproducing apparatus, wherein at least one A disc tray having a disc mounting portion, a recording and / or reproducing portion for recording and / or reproducing the disc mounted on the disc mounting portion, and at least an arc portion provided on the disc tray. A sun gear, a planetary gear having a large gear portion meshing with the sun gear, and a small gear portion meshing with the large gear portion and the rack portion; A moving mechanism for moving a disk tray between a disk capable of exchanging a disk placed on the disk mounting part and a recording or reproducing device for recording or reproducing the disk mounted on the mounting part; And at least one tooth of the sun gear, the planetary gear and the rack is displaced.

Here, the center-to-center distance between the sun gear and the large gear portion is set to the sum of the pitch circle radius ri of the sun gear and the pitch circle radius _r2 of the large gear portion, and the center of the sun gear and the large gear portion is set. A predetermined gap is provided at the distance.

Furthermore, the pitch radius of the sun gear is (r i-— λ), and the pitch radius of the planetary gear is {(r (1-X)} (where X is a coefficient).

Further objects of the present invention and specific advantages obtained by the present invention will become more apparent from the description of the embodiments described below. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a conventional planetary gear mechanism.

FIG. 2 is a plan view used to explain the center-to-center distance of the planetary gear mechanism shown in FIG.

FIG. 3 is a perspective view showing a disc player according to the present invention.

FIG. 4 is a perspective view showing a disc tray used in the disc player.

FIG. 5 is a plan view showing a tray moving mechanism for moving the disk tray. FIG. 6 is a plan view for explaining a sun gear, a planetary gear, and an internal gear rack provided in the tray moving mechanism.

Figure 7 is the tray moving mechanism, is a plan view showing the position of the planetary gear in a state where slide Dotorei is moved in the arrow A ₂ direction. FIG. 8 is a plan view showing the positions of the planetary gears during reproduction of the optical disc in the tray moving mechanism.

Figure 9 is the tray moving mechanism, is a plan view showing the position of the planetary gear in a state where slide Dotorei when reproducing the optical disc is moved to the arrow A ₂ direction.

FIG. 10 is a plan view showing the center-to-center distance of the large tooth portions of the sun gear and the planetary gear. FIG. 11A and FIG. 11B are plan views showing changes in the combined state caused by negatively displacing the large tooth portions of the sun gear and the planetary gear.

FIG. 12 is a plan view showing another example of the planetary gear mechanism. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a disc player to which the present invention is applied will be described with reference to the drawings.

As shown in FIGS. 3 and 4, a disc player 1 according to the present invention includes a disc tray 11 on which a plurality of optical discs 5 are placed, and a slide tray rotatably supporting the disc tray 11. 1 2, a tray moving mechanism 1 3 to slide the slide tray 1 2 in the direction of an arrow and an arrow a ₂ direction, and a tray rotating mechanism 1 4 you want to rotate. the disc tray 1 1.

As shown in FIGS. 4 and 5, the disc player 1 according to the present invention includes a disc rotation driving mechanism 15 for driving the optical disc 5 to rotate, a reproducing mechanism 16 for reproducing information from the optical disc 5, and an optical disc 5. Clamp mechanism 17 for holding, support base 18 for supporting disk rotation drive mechanism 15 and playback mechanism 16, support base 19 for supporting clamp mechanism 17 and support base 18, support base 18 And a rotation mechanism 20 that rotates so as to approach and separate from the clamp mechanism 17.

As shown in FIG. 4, the disk tray 11 is formed in a substantially disk shape, and the center is rotatably supported on the slide tray 12 via a rotation shaft 24. On the main surface of the disk tray 11, a plurality of disk mounting recesses 21 on which the optical disk 5 is mounted are formed along the outer periphery of the disk tray 11.

A drive opening 27 is provided at the center of each of the disc mounting recesses 26 to allow the disc rotation drive mechanism 13 to face the center hole of the optical disc 5. Also, this The drive opening 27 has a positioning groove 28 for positioning the disk mounting αα portion 26 with respect to the disk rotation drive mechanism 15. The disc placement recess 26 has a playback opening 29 to allow the playback mechanism 14 to face the optical disc 5, and a continuous drive opening 27 from the outer periphery of the disc tray 11 to the drive opening 27. Is provided. As shown in FIG. 4, the slide tray 12 is formed of a resin material in a substantially rectangular shape, and has a tray mounting recess 31 on which the disk tray 11 is rotatably mounted on a main surface. Is provided. Sly Dotorei 1 2 arrow A i and guide section 3 2 are respectively provided in the direction and one side surface parallel to the arrow A ₂ direction, the guide portion 3 2 is provided on the support base 1 9 Movably engaged with a guide rail (not shown).

Tray moving mechanism 1 3, 3, 4 and 5, the planetary gear mechanism 35 for conveying each slide Dotorei 1 2 in the arrow direction or arrow A ₂ direction, the planetary gear mechanism 3 And a drive mechanism 36 for rotating the drive 5.

As shown in FIGS. 5 and 6, the planetary gear mechanism 35 includes a sun gear 41 that is rotationally driven by a driving mechanism 36, and a planetary gear 4 2 that is rotationally driven and injected into the sun gear 41. And an internal rack 43 in which the planetary gears 42 are combined. The sun gear 41 is made of a resin material, and is rotatably provided on a rotating shaft 45 erected on a support base 19 as shown in FIG. The sun gear 41 is rotationally driven by a driving mechanism 36.

The planetary gear 42 is formed of a resin material, and as shown in FIG. 6, a rotating shaft 46 is formed in the center at the center. The planetary gear 42 has a large tooth part 47 to be combined with the sun gear 41 and a small tooth part with a smaller pitch circle than the large tooth part 47 and combined with the internal gear rack 43. are doing.

As shown in FIGS. 5 and 6, the internal tooth rack 43 is integrally formed on the bottom side of the slide tray 12 in a substantially U-shape as a whole, and linear track portions 51, 5 parallel to each other are provided. 2 and an arc-shaped orbital portion 53 connecting these linear orbital portions 51 and 52 continuously. The internal tooth rack 43 has linear track portions 51 and 52 formed parallel to the moving direction of the slide tray 12 and is located on the right side of the linear track portion 51 located on the left side in FIG. The straight track section 52 extends slightly behind the slide tray 12. It is formed to be long.

On the slide tray 12, the rotating shaft 46 of the planetary gear 42 is movably engaged with the inner peripheral side of the internal gear rack 43, and the small teeth portion 48 of the planetary gear 42 is fitted with the internal teeth. Guide grooves 55 for guiding the revolving operation of the planetary gears 42 in a state where they are engaged with the rack 43 are formed along the internal gear rack 43.

The planetary gear mechanism 35 of the tray moving mechanism 13 has an attachment / detachment position at which the optical disk 5 can be attached / detached to / from the disk tray 11 via the sun gear 41 and the planetary gear 42, and is mounted on the disk tray 11 The slide trays 12 are respectively moved to a reproduction position at which information is reproduced from the placed optical disk 5.

As shown in FIG. 5, the drive mechanism 36 included in the tray moving mechanism 13 includes a large-diameter pulley 76 for driving the sun gear 41 of the planetary gear mechanism 35 and a large-diameter pulley. A small-diameter pulley 7 7 that rotates and drives 6 6, a belt 7 8 that is stretched between the large-diameter pulley 7 6 and the small-diameter pulley 7 7, and a driving force, and a motor 7 9 that rotates and drives the small-diameter pulley 7 7 And

The large-diameter pulley 76 is fixed to the rotating shaft 45 of the sun gear 41. The motor 79 is provided on a support base 19, and a small-diameter pulley 77 is fixed to the rotating shaft 80. Therefore, the driving mechanism 36 rotates the sun gear 41 of the planetary gear mechanism 35 via the small-diameter pulley 77 and the large-diameter pulley 76 when the motor 79 rotates.

As shown in FIG. 4, the tray rotation drive mechanism 14 is disposed on the bottom of the slide tray 12 and has a rotation shaft 24 for rotatably supporting the disk tray 11 and a rotation shaft 2 for rotating the disk tray 11. 4 has a gear (not shown) and a motor 25 for rotating the gear. The tray rotation drive mechanism 14 rotates the disk tray 1 1 on the slide tray 1 2 in the tray mounting recess 3 1 so that the desired disk mounting recess 2 6 is moved to the front end of the slide tray 1 2. Side of the optical disc 5 so that the optical disc 5 can be easily attached to and detached from the disc mounting recess 26, and the optical disc 5 mounted in the desired disc mounting recess 26 can be driven to rotate. Move to the position facing the mechanism 15 and the playback mechanism 16.

As shown in FIG. 5, the optical disc 5 is placed on the disc rotation drive mechanism 15. It has a disk table 81 and a spindle motor 82 for driving the disk table 81 to rotate. The disk table 81 is formed in a substantially cylindrical shape by a magnetic metal material, and has a flange-shaped disk mounting surface on which the optical disk 5 is mounted on an outer peripheral portion on one end side. . A substantially cylindrical engagement member 84 that engages with the center hole of the optical disk 5 is provided on the inner periphery of the disk table 81. The spindle motor 82 has a spindle shaft 85 to which the disk table 81 is attached. The tip of the spindle shaft 85 is inserted through the inner peripheral portion of the engaging member 84 of the disk table 81. I have.

As shown in FIG. 5, the reproducing mechanism 16 has an optical pickup 88 for reproducing information from the optical disk 5 and a feeding mechanism 89 for moving the optical pickup 88 in the radial direction of the optical disk 5. ing. The optical pickup 35 includes an optical system having an objective lens for focusing laser light on the recording surface of the optical disk 5 and an objective in a direction parallel to the optical axis of the objective lens and in a direction perpendicular to the optical axis of the objective lens. A lens driving mechanism for driving and displacing the lens. The feed mechanism 89 feeds the support base that supports the optical pickup 35, a guide shaft that supports the support base movably in a direction parallel to the radial direction of the optical disk 5, and a support base. It has a thread motor (not shown).

As shown in FIG. 5, the clamp mechanism 17 includes a clamp member 91 that rotatably holds the optical disk 5, a disk-shaped clamp plate 92 that comes into contact with the optical disk 5, and a clamp member 91 that is a disk. And an operation arm 93 for moving the table 81 in a direction of moving toward and away from the table 81. The clamp member 91 is formed in a substantially cylindrical shape, and a clamp plate 92 is provided on an outer peripheral portion of one end facing the disk table 81. The operation arm 93 has a clamp member 91 supported at the distal end thereof, and a rotation shaft (not shown) rotatably supported by the support base 19 provided at a middle portion in the longitudinal direction. ing.

As shown in FIG. 5, the support base 18 is formed in a substantially rectangular block shape, and a disk rotation drive mechanism 15 and a reproduction mechanism 16 are respectively provided on a main surface facing the clamp mechanism 17. It is arranged. The support base 18 is provided at one end thereof with rotating support shafts 97, 97 rotatably supported by the support base 19, and a clamp mechanism 17. An operation part (not shown) for rotating the operation arm 93 is extended to the vicinity of the grave end side of the operation arm 93.

As shown in FIG. 5, the support base 18 is provided at its other end with an engagement member 98 to be engaged with the rotation mechanism 20. The rotation mechanism 20 is provided via the engagement element 98. It is rotated by. The main surface of the support base 18 is engaged with the positioning grooves 28 of the respective disc mounting recesses 26 of the disc tray 11 so that the optical disc 5 mounted on the respective disc mounting recesses 26 is placed thereon. A positioning shaft 99 for positioning with respect to the disk table 81 is provided upright. Therefore, the optical discs 5 placed in the disc loading recesses 26 of the disc tray 11 rotated by the tray rotation drive mechanism 14 are positioned at positions corresponding to the disc tables 81, respectively.

As shown in FIGS. 4 and 5, the support base 19 pivots a main surface portion 101 supporting the slide tray 12 movably in the directions of the arrows a 1 and a 2 and a support base 18. It has a rear part 102 that rotatably supports via 97 and 97, and a top plate part 103 that rotatably supports the operation arm 93 via a pivot. I have. Although not shown, the main surface 101 of the support base 18 is provided with an opening (not shown) in which the support base 18 is rotatably arranged.

As shown in FIG. 5, the rotating mechanism 20 includes a cam 110 for rotating the support base 18, an idler wheel 111 for rotating the cam 110, and a planetary gear mechanism 35. And an interlocking shaft 1 12 provided on a rotation shaft 45 of the sun gear 41. The sun gear 41 is operated in conjunction with the tray moving mechanism 13. The rotation mechanism 20 has a rotary encoder 117 that is provided on the rotation shaft 45 of the sun gear 41 and detects the revolution angle of the planetary gear 42. The rotary encoder 1 17 is rotated with the revolution of the planetary gear 4 2, so that the process of the transport operation of the slide tray 1 2 is detected.

The cam 110 is rotatably supported by a rotating shaft 113 erected on a support base 19, and a cam groove (not shown) for moving the engaging element 98 of the support base 18. Is formed over the outer periphery. The cam 110 is driven to rotate so that the support base 18 approaches and separates from the clamp member 91 of the clamp mechanism 17 via the engaging member 98 engaged in the cam groove. Rotate. That is, the support table 18 is raised, and the disk tape 81 and the clamp plate 92 of the clamp member 91 are used to hold the disk table. By clamping the optical disk 5 on the table 8 1 and lowering the support 81, the clamp of the optical disk 5 by the disk table 8 1 and the clamp plate 92 is released.

The idler wheel 1 1 1 is rotatably supported by a rotating shaft 1 1 4 standing upright on a support base 1 9, and its outer peripheral portion is in sliding contact with the outer peripheral portion of the cam 1 10. .

And have tray moving mechanism 1 3 Nitsu provided in the disc player 1 constructed as described above, the operation for conveying the slide Dotorei 1 2 in the direction of an arrow and an arrow A ₂ direction with reference to the accompanying drawings.

As shown in FIG. 5, in the tray moving mechanism 13, the slide tray 12 is moved in the direction of the arrow A i, and is transported to the playback position where the slide tray 12 is stored in the apparatus main body. In this state, as shown in FIG. 5, the planetary gear mechanism 35 moves the planetary gear 42 toward the left side in FIG. 5 with respect to the center of the arc-shaped orbital portion 53 of the internal gear rack 43 of the slide tray 12. It is in a state where it is positioned and bite. In this state, the disk rotation drive mechanism 15 and the reproduction mechanism 16 on the support base 18 are located at positions separated from the slide tray 12.

In the tray moving mechanism 13, from the state shown in FIG. 5, the small-diameter pulley 77 is rotated clockwise by the motor 79 of the drive mechanism 36, via the belt 78 and the sun gear 41. Then, the planetary gear 42 revolves counterclockwise along the arc-shaped orbital portion 53 of the internal gear rack 43, and eventually shifts to a state where it is engaged with the linear orbital portion 51 on the left side in the drawing. Thus, when the planetary gears 42 are engaged with the linear raceways 51 of the internal gear rack 43, the revolving position of the planetary gears 42 does not change, and the rotational force of the planetary gears 42 is changed. Is transmitted to the linear track portion 51 of the internal gear rack 43, and the slide tray 12 is conveyed in the direction of arrow a2.

In the tray moving mechanism 13, as shown in FIG. 7, the slide tray 12 was moved to the attaching / detaching position, and the planetary gears 42 were fitted to the ends of the linear track portions 51 of the internal gear rack 43. Then, the slide tray 12 is transported to the attachment / detachment position. With the slide tray 12 transported to the loading / unloading position in this way, as shown in FIG. 3, some of the disk mounting DA units 26 of the disk tray 11 are moved to the outside of the device. When the disc tray 11 is rotated in this state, the disc The operation of attaching and detaching the optical disk 5 to and from the optical disk 6 is performed.

In the disk player 1, the disk rotation drive mechanism 15 and the reproduction mechanism 16 are moved to a position separated from the disk table 11 in a state where the slide tray 12 is transported to the attachment / detachment position.

Next, the tray moving mechanism 13 is driven by the motor 79 of the drive mechanism 36 to rotate the small-diameter pulley 77 in a counterclockwise direction, so that the slide tray 12 is conveyed in the direction of the arrow A and is inserted into the apparatus body. Is stored. When the slide tray 12 is moved to the playback position in this way, as shown in FIG. 5, the tray moving mechanism 13 is configured such that the planetary gear 4 2 is formed by the linear track portion 5 1 of the internal gear rack 4 3. Is moved to the arc-shaped orbital portion 53 and revolves clockwise along the arc-shaped orbital portion 53.

As the planetary gear 4 2 revolves clockwise, the tray moving mechanism 13 rotates the interlocking gear 1 1 2 of the rotation mechanism 20 integrally with the revolution of the planetary gear 4 2, and the interlocking teeth The torque of the car 112 is transmitted to the cam 110 via the idler wheel 111, and the cam 110 is rotated.

When the cam 110 is rotated, the engaging mechanism 98 of the support base 18 is moved along the cam groove of the cam 110 to rotate the cam 110, and as shown in FIG. When the gear 42 is positioned on the right side in the figure with respect to the internal gear rack 43, the support base 18 is rotated about the rotation shafts 97, 97, and the disc is rotated. The optical disk 5 is placed on the disk table 8 1 of the rotation drive mechanism 15, and the optical disk 5 is rotatably held by the clamp members 91 of the clamp mechanism 17, and the optical disk 5 is rotated by the playback mechanism 16. A state in which the reproduction operation is enabled is established.

In the operation described above, the rotary encoder 1117 rotating with the revolution of the planetary gears 42 controls the process of transporting the slide tray 12 and clamping the optical disk 5 by the rotating mechanism 20. When it is detected and the planetary gear 42 is moved to the position shown in FIG. 8, the rotation drive of the motor 79 of the rotation mechanism 20 is stopped.

In the disc player 1, information is reproduced from the optical disc 5 by moving the optical pickup 88 of the reproducing mechanism 16 in the radial direction of the optical disc 5.

Further, the disc player 1 moves the slide tray 12 to the loading / unloading position during the reproducing operation of the optical disc 5, and the optical disc placed on the disc tray 11 is moved. It is possible to exchange 5

The tray moving mechanism 13 moves the planetary gear 42 from the state shown in FIG. 8 by rotating the small-diameter pulley 77 counterclockwise by the motor 79 of the drive mechanism 36 during the reproduction operation of the optical disc 5. The inner tooth rack 43 revolves clockwise along the arcuate track portion 53 to be engaged with the linear track portion 52.

As described above, the tray moving mechanism 13 is configured such that the planetary gears 4 2 are coupled to the linear orbital portions 52 of the internal gear rack 4 3, so that the rotational force of the planetary gears 4 2 is to be transmitted to Jo track portion 5 2, slide Dotorei 1 2 is moved in the arrow a ₂ direction.

As shown in FIG. 9, in the tray moving mechanism 13, the slide tray 12 was moved to the attachment / detachment position, and the planetary gears 42 were engaged with the ends of the linear track portions 52 of the internal gear rack 43. State. The tray moving mechanism 13 is configured such that the linear track portion 5 2 of the internal gear rack 43 is formed to be longer than the linear track portion 51, so that the slide tray 1 moved when the optical disc 5 is reproduced. 2 is further to be moved in the arrow a ₂ direction relative to the detaching position of the slide Doto ray 1 2 shown in FIG. 7 during non-regeneration.

This is so that when the optical disk 5 is replaced, when the disk table 11 on the slide tray 12 is rotated by the tray rotation drive mechanism 14, the reproduction operation of the optical disk 5 by the disk tray 11 is not hindered. to, in order to retract the disc tray 1 1-way countercurrent arrow a _2.

As shown in FIG. 10, the planetary gear mechanism 35 according to the present invention that constitutes the above-described tray moving mechanism 13 is configured such that the center distance between the sun gear 41 and the large tooth portion 47 of the planetary gear 42 is set to be different from each other. Set to (ri + rs) which is the sum of the pitch circle radii. The planetary gear mechanism 35 forms the sun gear 41 and the large tooth portion 47 of the planetary gear 42 by negatively displacing the teeth by a predetermined dislocation amount.

The planetary gear mechanism 35 with the center-to-center distance set to (n + rs) has the sun gear 41 in order to secure a predetermined gap λ at the center-to-center distance between the sun gear 41 and the planetary gear 42. The pitch circle radius is set to, and the planetary gear 42 has a pitch circle radius set to {r (1-X) λ}. Where X is a coefficient.

Regarding the planetary gear mechanism 35, the small tooth portions 48 of the planetary gears 42 and the internal tooth racks 43 The change in the combined state of the small tooth portions 48 and the internal tooth rack 43 of the planetary gear 42 due to at least one of the negative and positive displacements will be described with reference to the drawings.

First, as shown in FIG. 11A, the small tooth portion 48 of the planetary gear 42 of the planetary gear mechanism 35 and the internal tooth rack 43 interfere with each other, so that clogging is likely to occur, and Bad condition. That is, since the number of teeth of the small tooth portion 48 is smaller than that of the internal tooth rack 43, the small tooth portion 48 of the planetary gear wheel 42 and the internal tooth rack 43 interfere with each other.

By negatively displacing the small tooth portion 48 of the planetary gear 42 and the internal tooth rack 43 by a predetermined dislocation amount, as shown in 囪 11B, the planetary gear mechanism 35 That is, since the interference of the impotible can be prevented, the interference of each tooth is prevented. Note that, in this example, the direction of the dislocation of the small tooth portion 48 of the planetary gear 42 and the internal tooth rack 43 is negative in the small tooth portion 48 of the planetary gear 42, but the internal tooth rack In 4 3, it is a normal dislocation.

Therefore, the planetary gear mechanism 35, for example, is configured such that the sun gear 41 and the large tooth part 47 of the planetary gear 42 are dislocated, and the sun gear 41 and the large tooth part 47 of the planetary gear 42 are displaced. Since the combined state is set well, it is possible to prevent the teeth from being clogged due to an error in the center-to-center distance and thermal expansion, and it is possible to sufficiently secure operation reliability.

The planetary gear mechanism 35 included in the above-described tray moving mechanism 13 has a configuration in which the sun gear 41 and the large tooth portion 47 of the planetary gear 42 are respectively negatively displaced. Needless to say, the configuration may be such that the small tooth portion 48 of the gear 42 is negatively displaced and the internal tooth rack 43 is positively displaced.

In the planetary gear mechanism 35 described above, the pair of sun gears 41 and the planetary gears 42 are negatively displaced, but another gear mechanism including a sun gear and a plurality of planetary gears may be displaced. For example, as shown in FIG. 12, the other gear mechanism 60 includes a sun gear 61, first and second planetary gears 62, 63 engaged with the sun gear 61, respectively. The first and second planetary gears 62 and 63 each have an internal gear 64 coupled thereto.

The sun gear 61 is rotatably provided on a rotation shaft 66. As shown in FIG. 12, the first and second planetary gears 62, 63 are provided with pivot shafts 67, 68 at the center, and have large tooth portions 71, 73 and Pitch circle smaller than large teeth 7 1, 7 3 Small tooth portions 72, 74 are provided. The internal gear 64 is disposed so that the rotation center coincides with the sun gear 61.

The sun gear 61 and the large tooth portions 71, 73 of the first and second planetary gears 62, 63 are negatively displaced, so that the sun gear 61 and the first planetary gear 62, A predetermined gap is set between the center of the large tooth portion 71 and the center of the large tooth portion 73 of the sun gear 61 and the second planetary gear 62. In this gear mechanism 60, the small teeth 72, 74 of the first and second planetary gears 62, 63 are displaced in the negative direction and the internal gear 64 is displaced in the forward direction. The distance between the center of the small tooth portion 72 of the first planetary gear 62 and the internal gear 64 and the distance between the center of the small tooth portion 74 of the second planetary gear 63 and the central gear 64 A predetermined gap may be ensured.

The gear mechanism 60 configured as described above is provided with a large tooth portion of the first and second planetary gears 62 and 63 when the sun gear 61 is rotated by a motor or the like (not shown). 7 1 and 7 3 are each driven to rotate. The first and second planetary gears 62, 63 are driven by rotating the large tooth portions 71, 73, whereby the small tooth portions 72, 74 are driven to rotate, and the sun gear 61 is rotated. The internal gear 64 is driven to rotate by revolving around the rotation shaft 66 as a rotation center.

As described above, in the disk player 1 according to the present invention, the planetary gear mechanism 35 of the tray moving mechanism 13 is configured such that the sun gear 41 and the large tooth portion 47 of the planetary gear 42 are negatively displaced. As a result, the distance between the pitches of the sun gear 41 and the planetary gears 42 can be sufficiently ensured, so that interference such as clogging of the sun gears 41 and the planetary gears 42 can be prevented, The operation reliability of the planetary gear mechanism 35 can be improved.

According to the disk tray moving device using the above-described tray moving mechanism 13, the gears of the planetary gear mechanism 35 are transposed, so that the pitch circle radius of each gear is constant, and the inside of the apparatus main body is limited. Since the module can set large gears in the space, operation reliability can be improved.

It should be noted that the present invention is not limited to the above-described disc player, but can be applied to a recording and / or reproducing apparatus using a disc such as an optical disc as an information recording medium to obtain the same advantages as described above. INDUSTRIAL APPLICABILITY As described above, the gear mechanism according to the present invention can prevent the interference of each gear and improve the operation reliability. By using this gear mechanism, the disc tray moving device and It is possible to reduce the size of the entire disc recording and / or reproducing apparatus.

According to the disk tray moving device using the above-described disk tray moving mechanism, interference between the gears can be prevented, and the reliability of the disk tray moving operation can be improved.

Claims

The scope of the claims

1. a disk tray having at least one disk mount,

A rack comprising an arc portion and at least one straight portion provided on the disc tray;

A sun gear, a planetary gear having a large gear portion meshing with the sun gear, a large gear portion and a small gear portion meshing with the rack portion, and the disk tray is mounted on the disk mounting portion. A moving mechanism that moves between a position where the device is projected outside the device and a position stored inside the device,

An apparatus for moving a disk tray in which at least one tooth of the sun gear, the planetary gear, and the rack is displaced.

2. The disc tray moving device according to claim 1, wherein the device is configured such that teeth of the sun gear and the large gear portion are negatively displaced by a predetermined amount.

3. The apparatus according to claim 1, wherein the teeth of the small gear portion are formed by shifting negatively, and the teeth of the rack portion are shifted forwardly.

4. The sun gear and

At least one planetary gear having a small gear portion and a large gear portion meshing with the sun gear, wherein the small gear portion and the large gear portion rotate in a body;

A rack portion arranged in mesh with the small gear portion so that the planetary gear revolves around the sun gear when the sun gear rotates.

A gear mechanism in which at least one tooth of the sun gear, the planetary gear, and the rack portion is displaced.

5. The gear mechanism according to claim 4, wherein in the mechanism, the sun gear and the large gear portion are negatively displaced by a predetermined amount.

6. The gear mechanism according to claim 5, wherein the mechanism is formed by negatively displacing the teeth of the small gear part, and the teeth of the rack part are positively displaced.

7. a disk tray having at least one disk mount;

Recording and / or reproduction for recording and / or reproducing the disc placed on the disc loading section And / or a playback unit,

A rack portion provided with an arc portion and at least one straight portion provided on the disc tray;

A sun gear, a planetary gear having a large gear portion meshing with the sun gear, a small gear portion meshing with the large gear portion and the rack portion, and mounting the disk tray on the disk mounting portion. A moving mechanism for moving between a position where the disc placed on the disc can be exchanged and a recording or reproducing device for recording or reproducing the disc placed on the mounting section;

A recording and / or reproducing apparatus for a disk in which at least one tooth of the sun gear, the planetary gear, and the rack is displaced.

8. The disk recording and Z or reproducing apparatus according to claim 7, wherein said apparatus is configured such that teeth of said sun gear and said large gear part are negatively displaced by a predetermined amount.

9. The disk recording and / or reproducing apparatus according to claim 7, wherein the teeth of the small gear portion are formed by negative shifting, and the teeth of the rack portion are shifted by positive shifting. apparatus.

10. The center distance between the sun gear and the large gear portion is set to the sum of the pitch circle radius r of the sun gear and the pitch circle radius r ₂ of the large gear portion. A predetermined gap λ is provided at a center-to-center distance with the large gear portion.

Item 7. A disk recording and / or reproducing device according to item 7.

. 1 1 pitch circle radius of the sun gear - and (r ^ χ λ), the planetary gear pitch radius - claims to {(r ₂ (1 one X)} (where, X is the coefficient) Item 10. The recording and / or reproducing device for a disk according to Item 10.