JPS63300481A - Disk player - Google Patents

Abstract

PURPOSE:To improve the positioning accuracy of a small-diameter disk to its loading position, by interposing an elastic member which enforces a driving device toward the small-diameter disk loading position of a guide shaft between a small-diameter disk feeding mechanism and the driving device. CONSTITUTION:A feeding mechanism 40 which reciprocate a small-diameter disk driving device 30 along a guide shaft 31 is constituted of a rack 41 which slides on a block 3C fixed to a chassis 3 in parallel with the guide shaft 31, motor 42, and reduction gear 43. Between one side-end section of the rack 41 and a coupling link 35 supported by the moving body 32 of the driving device 30, a coil spring 45 which enforces the driving device 40 toward the small- diameter disk loading position side is provided. Therefore, the small-diameter disk driving device 30 can be positioned smoothly and accurately to the loading position and the reproducing characteristic of a small-diameter disk can be improved.

Description

[Detailed description of the invention] The invention will be explained in the following order.

A. Industrial field of application B0 Overview of the invention C1 Prior art 3 Problems to be solved by the invention E1 Means for solving the problems F6 Effects G. Embodiments Gt. Overall configuration of a disc player (third example) Figure, Figure 4,
Figure 9) Gt, configuration of the disc tray (Figure 2) G, configuration of the LD coarse drive unit (Figures 3 and 4) G, configuration of the CD drive unit (Figures 1 and 4) .

(Fig. 1θ, Fig. 11) G5. Feed mechanism of CD drive device (Fig. 1, Fig. 4, Fig. 11) Gs, configuration of optical pickup (Fig. 1, Fig. 4).

(Figures 12 and 13) G? , Optical pickup feeding mechanism (Fig. 4, Fig. 12) G8. Structure of one tray carrier (Fig. 4, Fig. 5,
(Fig. 6) Gs, configuration of the other tray carrier (Fig. 1, Fig. 4,
(Fig. 6, Fig. 20) G10. Structure of tray transport body (Fig. 3, Fig. 6)G,
,, Structure of chuck plate for LD (Fig. 3).

Figure 6) Configuration of chuck plate for Glt and CD (Fig. 6).

Figure 9) G 13. Configuration of carrier drive mechanism (Figures 4 and 6) G 14. Configuration of differential gear (Figures 4 and 5) G36.
Configuration of servo member (Fig. 1, Fig. 4) Gllll, configuration of guide member (Fig. 6, Fig. 7, Fig. 8) G41. Configuration of guide member drive mechanism (Fig. 4) G13.
Operation of the embodiment (Figs. 14 to 25) H0 Effect of the invention A, Industrial field of application This invention provides an optical video disc (hereinafter abbreviated as LD) as a large-diameter disc and a compact disc as a small-diameter disc. The present invention relates to a dual-use LD/CD disc player (so-called compatible player) that can selectively load and play two types of discs (hereinafter abbreviated as CD).

B0 Summary of the Invention This invention provides a system for installing an LD (large diameter disc) or a CD (small diameter disc) within the player body by horizontally inserting and removing a disc tray from an opening formed in the front surface of the player body. An LD/C that is transported to either one of the LD and CD drive devices, and that plays the disk by moving an optical pickup in the radial direction of the rotating disk mounted on the one drive device.
A dual-purpose disc player, comprising: a guide shaft on which the CD driving device and optical pickup are movably arranged; and a feeding mechanism that moves the driving device toward and away from the optical pickup; By interposing an elastic member between the feeding mechanism and the drive device to urge the drive device to the CD loading position of the guide shaft, the CD drive device can be driven with high precision. The player can be positioned and locked at the loading position, and the player body can be made even thinner.

C8 Conventional technology Two types of discs, a large-diameter optical video disc (LD) and a small-diameter compact disc (CD), can be selectively loaded into the player and played back.
2. Description of the Related Art Disc players that can be used for both D/CD (so-called compatible players) are known.

To explain this in detail with reference to FIGS. 26 to 30, 200 is an LD/CD IIE disk player, which can be inserted and removed horizontally from an opening 202 formed in the front of a straight player body 201. LD 203 or CD 204 is arranged inside the player main body 201.
A disc tray 205 for selectively transporting L D
A spindle motor (drive device) 209 for the LD that rotates the CD 203 and a rocking mechanism consisting of a rack, pinion, etc. (not shown) are provided on the chassis 208 so that the CD 204 can be tilted approximately 90 degrees from a vertical position. A spindle motor (drive device) 21 for the CD that rotates the
G and a slide guide shaft 211 installed in parallel at a predetermined height from the upper surface of the chassis 208 so as to be movable back and forth by a drive mechanism (not shown).
Alternatively, it is provided with an optical pickup 212 that moves in the radial direction of the CD 204 and reads the information.

Note that when the disc tray 205 is pulled out from the opening 202 of the player main body 201, as shown in FIG. When the disc tray 205 is stored in the player body 201 by a loading mechanism (not shown), the CD carrier part 207
As shown in FIG. 27, the disk tray 205 is moved several times as much relative to the amount of retraction movement of the disk tray 205 by a drive mechanism including a rack, speed-up gear, etc. (not shown).
It is located at the rear of the disc tray 205 (at a predetermined CD playback position at the back of the player body 201).

When playing the LD 203, the disc tray 205 is moved downward into the player main body 201 by the loading mechanism as shown by the solid line in FIG.
The LD 203 mounted on the turntable 213 of the spindle motor 209 and the chuck (clamper) 21 for the LD
4 and rotated at high speed, the L D 2
The information of 03 is read and reproduced by moving the LD 203 of the optical pickup 212 in the radial direction. In this case, the CD spindle motor 210 is tilted and does not get in the way when the optical pickup 212 moves in the radial direction of the L D 2G3.

Furthermore, when playing the CD 204, the disc tray 205 is moved downward in the same way as the LD 203, and the CD 204 placed on the CD carrier part 207 of the disc tray 205 is shown in FIG. The turntable 215 of the spindle motor 210 is vertically erected as shown in FIG.
By holding the CD 204 in the CD chuck 216 and rotating it, the information on the CD 204 is transferred to the optical pickup 212.
The CD 204 is read and played by moving it in the radial direction.

D. Problems to be Solved by the Invention However, in the conventional disc player 200, only the optical pickup 212 is allowed to slide freely on the slide guide shaft 211, and the spindle motor 210 is vertically moved by a swinging mechanism when playing a CD 204. Since the spindle motor 210 is designed to stand upright, it is difficult to accurately position and lock the spindle motor 210 vertically due to rattling of the swing mechanism, etc., and the positional accuracy of the turntable 215 of the spindle motor 210 is likely to be disturbed. There is a drawback that mischucks tend to occur when the CD 204 is held by the turntable 215 and the chuck 216 due to the misalignment.

Further, the structure for tilting the spindle motor 210 having the disc-shaped turntable 215 requires a large vertical space, so that it is not possible to make the player main body 201 sufficiently thin.

Therefore, the present invention provides a disc player that can solve the above problems.

Means for Solving the E0 Problem A disk tray is provided which is horizontally removable from an opening formed in the front surface of a player body and conveys a large-diameter disk or a small-diameter disk into the player body, and the player body. drive devices for a large-diameter disk and a drive device for a small-diameter disk, each provided within the player body to rotate each of the disks; and an optical pickup provided between each drive device in the player main body to read information on each disk. A disc player comprising: a guide shaft on which the drive device for the small-diameter disc and the optical pickup are arranged so as to be movable back and forth; and a feeding mechanism that moves the drive device toward and away from the optical pickup;
An elastic member is interposed between the feeding mechanism and the drive device to urge the drive device to a loading position of the small diameter disk of the guide shaft.

F0 action When playing a small-diameter disc, the drive device for the small-diameter disc is moved by the feeding mechanism along the guide shaft to the loading position of the small-diameter disc in the player body, and is positioned at that precise loading position via an elastic member. locked.

G. Example Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

G□, Overall configuration of the disc player (Fig. 3, Fig. 4,
Figure 9) 1 in Figure 1 is a disc player that selectively loads and plays two types of discs: an optical video disc (LD) as a large-diameter disc and a compact disc (CD) as a small-diameter disc. L can
It is a so-called compatible player that can be used for both D/CD.

This disc player 1, as shown in Fig. 4.9,
A player main body 2 having an opening 2a formed on the front surface, a disc tray 1O that is provided to be horizontally removable through the opening 2a and for transporting the LD or CD into the player main body 2, and a bottom surface of the player main body 2. an LD drive device 20 and a CD drive device 30 that are disposed on a chassis 3 disposed on the side and rotate the LD and CD;
A feeding mechanism 40 that reciprocates this CD drive device 13Q toward the LD drive device 20 side, and these drive devices 20
．． an optical pickup 50 that is movable back and forth between 30 and 30 and reads information on each of the LD and CD discs;
A pair of tray carriers 70 are provided so as to be movable in the vertical direction with respect to a pair of side plates 4.5 erected facing each other on both sides of the player main body 2, and on which the disc tray IO is placed and supported. .80 is slidably provided on at least one of the pair of tray carriers 70.80, and the disk tray 1O is placed thereon, so that when the pair of tray carriers 70.80 rises, the disk tray 10
a tray transporting body 9 that transports the paper from the opening 2a to the outside
0, and a chuck plate 100 for an LD and a chuck plate 100 for a CD, which are provided so as to be able to follow the vertical movement of the pair of tray carriers 70.80, and allow the respective drive devices 20.30 to hold the LD and CD via each chuck. a chuck plate 110, a carrier drive mechanism 120 connected to the pair of tray carriers 70.80 to move the pair of tray carriers 70.80 up and down, and the disk tray lO on the pair of tray carriers 70.80. a differential gear 130 as a differential device that is connected to the optical pickup 50 and moves the disk tray lO in the horizontal direction; A skew servo member 140 as a servo member for causing the optical pickup 50 to follow along the carrier drive mechanism 120 is rotatably supported on the opening 2a side between the pair of tray carriers 70 and 80 of the chassis and a control cam plate 150 as a guide member that controls and interlocks the differential gear 130 and the skew servo member 140, respectively.

In addition, code 8 indicates a large diameter LD with a diameter of 30 cm, and 9 indicates a diameter of 1
Each CD is shown with a small diameter of 2 cm.

Gt, Structure of Disk Tray (FIG. 2) The disk tray 10 is formed of synthetic resin into a rectangular plate shape. A large-diameter mounting portion 11 for guiding the LD is formed in an annular concave shape from approximately the center of the upper surface of the disk tray to both side edges. This large-diameter mounting portion 11 includes a large-diameter recess 11a formed one size larger than the large-diameter (diameter 30c++) LD8, and a medium-diameter recess 11b formed one size larger than the medium-diameter (diameter 20am) LD. It has concentric circular brackets in the form of steps. Cutouts 12 and 12 for taking out the large-diameter LD 8 are formed at both ends of the large-diameter mounting portion 11.

Also, one of the front sides of the disk tray 10 (right side in the figure)
A small-diameter mounting section 13 for guiding a CD is formed at a corner side of the disc and at a position approximately accommodated within the large-diameter mounting section 11. This small diameter mounting portion 13 has a small diameter (12 cm+ diameter) C
It has a small diameter recess 13a formed one size larger than D9 and a minimum diameter recess 13b formed one size larger than the minimum diameter CD (diameter 8 am) in a concentric and stepped shape. Recesses 14, 14 for taking out the small diameter CD 9 are formed at the side end of the small diameter mounting portion 13 on the notch 12 side of the large diameter mounting portion 11 and at the side end opposite thereto.

A diagonal notch 1 for moving the optical pickup 50 from the center of the large-diameter mounting section 11 to the one corner side.
5 is formed. When the disc tray 10 is housed in the player main body 2, the CD driving device 30 and optical pickup 50 are disposed so as to be movable back and forth along the notch 15. Further, as shown in Fig. 3.16, a long slide guide groove 16 is formed on the right side of the disc tray 10 in the figure (small diameter mounting section 13 side) from the front to the rear. , on the side opposite to this (
A housing portion 17 having a U-shaped cross section for housing the tray transport body 90 is integrally formed at the bottom of the left side in the figure. A rack 18 is provided on the inner side of the accommodating portion 17 on the side of the cutout portion 15 . Furthermore, a positioning guide hole 19 is formed at the rear left side of the disc tray 10. This guide hole 19
is fitted into a pin 6 erected at a predetermined position at the rear of the chassis 3 while the disc tray 10 is being loaded into the player body 2 . Thereby, the disc tray IO is reliably positioned at a predetermined loading position within the player body 2.

G3. LD rough drive device configuration (Fig. 3.4) The LDD drive device 20 is used to store the disk tray IO of the chassis 3 (Fig. 3.4).
A spindle motor 21 is embedded at a position corresponding to the center position of the large-diameter mounting portion ll during retraction) and rotates an LD such as an LD8 at high speed, and a spindle motor 21 is integrated with the upper end outer circumference of the spindle 22 of the spindle motor 21. provided in the above L
It is composed of a turntable 23 on which D is placed.

G., Configuration of CD drive device (Fig. 1, Fig. 4, 1θ
(Fig. 11) The drive device 30 for CD drives the disc tray lO when stored.
1 arranged along the position of the rear side edge of the diagonal notch 15 of
A block-shaped transfer body 32 that penetrates a book guide shaft 31 and slides back and forth; a spindle motor 33 that is fixed to the front bottom of the transfer body 32 and rotates a CD such as a CD9; The CD is fixed to a spindle 33a protruding from the upper surface of the transfer body 32.
a turntable 34 on which the
The other end is supported by a pin at the rear of the bottom of the feed mechanism 4, which will be described later.
It is composed of a substantially T-shaped plate-shaped connection link 35 that is pivotally supported by a pin at one end of a plate-shaped rack 41.

Both ends of the guide shaft 31 are fixed to a pair of brackets 3B, 3B protruding from the chassis 3.

The pair of brackets 3B, 3B are connected to a rear longitudinal side edge 3a of an opening 3A, which is formed in the chassis 3 at a position corresponding to the diagonal notch 15 of the disc tray 10 when stored, and has approximately the same shape as the notch 15. Located on both sides. A rail 36 having a single-shaped cross section is fixed at the stroke position of the transfer body 32 on the rear side edge 3a. At the forward stroke end position of the transfer body 32 on this rail 36, the chassis 3
The hook-shaped tip 37a of the adjustment plate 37, which is pivotally supported by a pin, is protruded. Further, a roller 39 rotatably supported by the lower end of a shaft 38 vertically protruding downward from the center of the bottom surface of the transfer body 32 is fitted into the rail 36 .

Note that a tapered portion 32a is formed on the side surface of the central portion of the transfer body 32 on the tray carrier 80 side.

Furthermore, the transport body 32 moves back and retreats to the tray carrier 80 during playback of the LD.

Gs, configuration of the feeding mechanism of the CD drive device (Fig. 1).

(FIGS. 4 and 11) The feeding mechanism 40 that reciprocates the CD drive device 30 along the guide shaft 31 is a rack that slides on a block 3C fixed on the chassis 3 in parallel to the guide shaft 31. 41, a motor 42 that drives the rack 41, and a speed reduction device 43 that is provided between the rack 41 and the motor 42 and that reduces the driving force of the motor 42 and transmits it to the rack 41.

The rack 41 is formed into a long rectangular plate shape and has a long hole 41a in the center thereof.

Each shank portion of a pair of screws 44 and 44 screwed into the block 3C is inserted into this elongated hole 41a. The protruding piece 41b integrally bent at one end of the rack 41 on the guide shaft 31 side and the midway portion 35b of the connecting link 35 are provided to press the CD drive device 30 toward the CD loading position. A biasing coil spring (elastic member) 45 is interposed. Further, a plurality of gear portions 41c are formed on the other end edge of the rack 41.

The speed reduction device 43 meshes with a pair of brackets 46.46 fixed at a predetermined position on the chassis 3, a worm gear 47 rotatably supported between the pair of brackets 46.46, and the worm gear 47. The pinion 48 has a large diameter gear part 48a and a small diameter gear part 48b that meshes with the gear part 41c of the rack 41, and is rotatably supported by the chassis 3. A belt 49 is stretched between a pulley 42a fixed to the rotating shaft of the motor 42 and a pulley 47a fixed to one end of the worm gear 47.

Go, configuration of optical pickup (Fig. 1, Fig. 4).

(FIGS. 12 and 13) The optical pickup 50 includes a substantially U-shaped block-shaped transfer body 51 whose one end penetrates the guide shaft 31 and slides back and forth, and a threaded portion 52a on the one end of the transfer body 51. The pickup main body 53 is supported rotatably in the vertical direction via a formed support shaft 52. A plate-like rack 54 is fixed to the upper surface of one end of the transfer body 51 with a screw 55, and a roller 57 is fixed to the side surface of the other end via a shaft 56 projecting perpendicularly to the side surface. It is rotatably supported. This roller 57 rolls on the front side edge 3b of the opening 3A of the chassis 3 so that the transport body 51 and the pickup main body 53 are kept in a horizontal state.

On the top surface of the pickup main body 53, there is an objective lens 58 that irradiates and focuses a laser beam on the pits of each disk of LD and CD, and a detection light that detects the inclination of the disk surface due to warping or the like with respect to the optical axis. A skew lens 59 is provided for irradiating the light. Further, on the side surface of the pickup main body 53 on the roller 57 side, a support pin 60 is projected perpendicularly to the side surface. A coil spring 61 is interposed between the support pin 60 and the other end 51a of the transfer body 51. Due to the tensile force of this coil spring 61,
The pickup main body 53 is always urged to rotate upward about the support shaft 52 and maintain a horizontal state.

Incidentally, as shown in FIG. 12, the pickup main body 53 is
The transfer body 51 and the pickup body 53 pass through the support shaft 52.
The roller 57 is urged by the elastic force of a spring washer 62 interposed between the support shaft 52 and the roller 57, and by screwing the support shaft 52 in a predetermined direction against the elastic force of the spring washer 62. , can be horizontally moved toward the rack 54 side to finely adjust its position.

G? , Configuration of the optical pickup feeding mechanism (FIGS. 4 and 12) The feeding mechanism 63 that reciprocates the optical pickup 50 along the guide shaft 31 between the LD drive device 20 and the CD drive device 30 is as follows: A binion 64 rotatably supported by the chassis 3, which has a small diameter gear part 64a on the upper part that meshes with the rack 54 and a large diameter gear part 64b integrally formed with the small diameter gear part 64a on the lower part, and the pinion on the lower part. A large-diameter driven pulley 65 is rotatably supported by the chassis 3 and has a small-diameter gear portion 65a that meshes with a large-diameter gear portion 64b of 64. The motor 66 has a small-diameter drive pulley 67 fixed to a shaft 66a protruding from the upper surface of the chassis 3, and a belt 68 is stretched between the drive pulley 67 and the driven pulley 65 and rotates the driven pulley 65. ing.

Gs, configuration of one tray carrier (Fig. 4, Fig. 5,
(FIG. 6) A metal plate-shaped tray carrier 70 located on the left side of the figure is formed into a 5-shape with a bottom piece 71 and an upright piece 72 bent at right angles.

A pair of engagement pins 73 are provided at the front and rear of the lower surface of the bottom piece 71.
．． 73 protrudes perpendicularly to the lower surface. The pair of engagement pins 73.73 are inserted into a pair of cylindrical portions 30.3C formed to stand vertically from above to below at predetermined positions of the chassis 3, and are configured to move up and down. . Further, a long rail 74 having a substantially C-shaped cross section is fixed to the upper surface of the bottom piece 71. Furthermore, a protruding piece 71a that rotatably supports a differential gear 130, which will be described later, is protruded from the inside of the front part of the bottom piece 71.

A pair of engagement pins 76 and 77 are provided on the front and rear sides of the outer surface of the upright piece 72 to protrude perpendicularly to the outer surface. Further, at the upper center of the upright piece 72, a pair of plate support pieces 72a, 72a are bent perpendicularly to the inner surface thereof and protruded so as to face each other. 72a, 72a have round holes 78.79
are formed respectively.

Gs, configuration of the other tray carrier (Fig. 1, Fig. 4,
(FIGS. 6 and 20) A metal plate-shaped tray carrier 80 located on the right side of the figure is formed into an inverted shape with a bottom piece 81 bent at right angles and an upright piece 82. 70 and are facing each other at the same height with a predetermined spacing therebetween.

A pair of engagement pins 83 are provided at the front and rear of the lower surface of the bottom piece 81.
．． 83 protrudes perpendicularly to the lower surface. The pair of engagement pins 83.83 are inserted into a pair of cylindrical portions 3D, 3D formed to vertically stand up from above to below at a predetermined position of the chassis 3, so as to move up and down. . Furthermore, a guide 84 made of synthetic resin and having a convex cross section is fixed to the upper surface of the bottom piece 81 and the inner surface of the upright piece 82.

A protrusion 84a is formed at the center of the inner side of the guide 84 to protrude in the longitudinal direction. By fitting the protrusion 84a into the slide guide groove 16 of the disc tray 10, the disc tray 10 slides on the upper surface of the bottom piece 81 along the protrusion 84a of the guide 84. Further, a pair of cylindrical guide portions 84b and 84c are vertically integrally formed on the front side of the upper surface of the guide 84.

Furthermore, a rectangular through hole 85 is formed on the side of the upright piece 82 at the center of the bottom piece 81 and the guide 84, into which a convex edge 103 that functions as a switch operation lever of a chuck plate 100 for LD, which will be described later, is inserted. It is.

A pair of engagement pins 86 and 87 are provided on the front and rear sides of the outer surface of the upright piece 82 to project perpendicularly to the outer surface. Further, concave notches 82a and 82b are formed in the center and front portions of the upper end of the upright piece 82, respectively. A CD chuck plate 110, which will be described later, is placed between the cylindrical guide portions 84b and 84c on the inner surface of the upright piece 82.
An adjustment lever 88 for correcting the difference in thickness between D and CD is pivotably supported upwardly by a pin. An engagement pin 89 placed in the notch 82b on the front side is vertically fixed to the tip side of the adjustment lever 88.

G1゜, Structure of tray transport body (Figs. 3 and 6) The disc tray 10 is placed on the rail 74 fixed to the left tray carrier 70 and transported outward from the opening 2a of the player body 2. The tray transport body 90 is stored therein. This tray transport body 90 has a flat portion 9 with a flat top.
1 and both side portions 92° 92 extending downward from both side ends of this flat portion 91 form a long length having a substantially C-shaped cross section. An L-shaped bracket 93 is fixed to the front part of the flat part 91 of the transfer body 90, and a mounting hole 91a is fixed to the rear part of the bracket 93.
It is formed. These brackets 93 and mounting holes 91
The disk tray 10 is fixed to a by screws (not shown).

Furthermore, approximately U-shaped linear bearings 95 having a plurality of steel balls 94 arranged on both sides are interposed between both sides 92.92 of the tray transfer body 90 and both sides of the rail 74. The tray transport body 90 can be smoothly reciprocated with respect to the rails 74.

Configuration of chuck plate for C++, LD (Fig. 3).

(Fig. 6) The chuck plate 100 for LD is formed into a rectangular shape by a thin metal plate, and the longitudinal side edges 101
．． 102 is formed by bending vertically upward, and
The edge portion 103 on the other side of the tray carrier 80 is vertically bent downward and protrudes in a substantially convex shape. A disk-shaped chuck 104 made of synthetic resin is rotatably supported at a position corresponding to the turntable 23 of the LD rough drive device 0 at the center of the lower surface of the chuck plate 100. Further, both side edge portions 101 of the chuck plate 100
, 102 and the outer surface of the edge portion 103 on the tray carrier 80 side are engagement pins 105, 106, 107.
are protruding from each other. These both side edge parts 101,1
The engagement pins 105 and 106 of 02 are fitted into a pair of round holes 78 and 79 of the one tray carrier 70 and are rotatably supported upward, and are engaged with the end edge 103 on the tray carrier 80 side. The matching pin 107 is connected to the tray carrier 80.
It is placed in the central notch 822L and can be detached. As a result, the chuck plate 100 is provided so as to be able to follow the vertical movement of the pair of tray carriers 70 and 80, and when the chuck plate 100 is lowered, the LD is held (clamped) on the turntable 23 of the LD rough drive device 0 via the chuck 104. ).

Further, when the pair of tray carriers 70 and 80 are lowered, the tip 103a of the edge portion 103 of the chuck plate 100 on the tray carrier 80 side can be freely inserted into the through hole 85 of the tray carrier 80. A switch 108 as a detection means is arranged on the bottom plate 3' below the through hole 85 and the chassis 3. This switch 108
is connected to a microcomputer (not shown) having a controller. This microcomputer includes a display section 7 provided on the front side of the player body 2.
It is connected to. Therefore, the chuck plate 100
When the LD rough drive device 0 is lowered, the tip 103a of the end edge 03 presses the switch 108 (ON operation), thereby connecting the turntable 23 of the LD rough drive device 0 and the chuck 104 of the chuck plate 100. It is detected that the clamp state of the LD is a normal state. Further, when the chuck plate 100 is lowered and its tip 103& does not press the switch 108, it is detected that the LD clamp is in a mischuck state, and the microcomputer displays this on the display section 7. At the same time, the microcomputer controls the drive of the spindle motor 21 of the LDD drive device 20 via the controller.

G, 2. Structure of a CD chuck plate (Fig. 1).

(FIG. 6) The chuck plate 110 for CD is formed into a tongue-like shape by a thin metal plate, and a chuck 111 is rotatably supported on the arcuate tip side of the lower surface thereof. This chuck l11 is composed of a disk-shaped magnet or the like, and is adapted to hold a CD between the chuck 12 and the turntable 34 of the CD drive device 30 during playback of the CD.

Further, a pair of rod-shaped support shafts 112 and 113 are vertically protruded downward from the tray carrier 80 side of the lower surface of the chuck plate 110. This pair of support shafts 112,
113 is loosely inserted into a pair of cylindrical guide portions 84b and 84c of the tray carrier 80, respectively, so as to be vertically movable. As a result, when playing a CD, the chuck plate 1
10 is placed on the adjustment lever 88 of the tray carrier 80, and is also placed on the upper surface of the transport body 32 of the CD drive device 30, with the one support shaft 112 retracted to the tray carrier 80 side during LD playback. This prevents the CD chuck plate 110 from moving downward.

Further, on the side edge of the chuck plate 110 on the LD chuck plate 100 side, an inverted-shaped locking protrusion 1 is provided.
14 is bent and formed. This locking protrusion 114 is
It is engaged in a concave notch 101a formed in a side edge lot of the chuck plate 100 of the LD. Thereby, the horizontal state of the CD chuck plate 110 is maintained.

G13. Configuration of carrier drive mechanism (Fig. 4, Fig. 6)
The carrier drive mechanism 120 that moves the pair of tray carriers 70 and 80 up and down includes a cam follower 121 provided at one end (front end) of the control cam plate 1, which will be described later.
A pair of support pins 12 are engaged with the first cam grooves 151 of 50 and are erected on the chassis 3 at a predetermined interval.
2, 123 to reciprocate in the horizontal direction, and the other end (rear end) of this control lever 124 is pivotally supported by a pin, and is rotatably attached to the chassis 3 via a shaft 125. Supported rotation/(
−126 and recesses 126 on both ends of this rotating lever 126
a pair of slide cam levers 127 and 128 that are engaged with the slide cam levers 127 and 126 b and are provided to be reciprocally slidable on the chassis 3 in the same direction as the control lever 124, and move the pair of tray carriers 70 and 80 in the vertical direction;
Both ends are locked by the locking protrusion 126c of the rotating lever 126 and one of the support pins 123 fixed to the chassis 3, thereby urging the pair of tray carriers 70° to 80 to move upward. Coil spring (elastic member) 12
It consists of 9.

The control lever 124 is bent into a long, substantially rectangular shape with a step in the middle, and rectangular holes 124a, 12 are formed in the rear end and rear side of the control lever 124.
4b is formed. The support pins 122, 123 are inserted into the holes 124a, 124b, and the control lever 124 is reciprocated in the front-rear direction of the chassis 3 near the drive device 20 between the tray carrier 70 and the LD drive device 20. It can be arranged freely.

The slide cam lever 127 located on the left side of the figure is formed into an elongated rectangular plate shape and stands upright, and has an engagement pin 127a hanging downward in a recess formed at the rear of the bottom surface, and has an engagement pin 127a hanging downward from the inner surface thereof. Cam grooves 127b and 127d are formed at the front and rear sides of the body so as to gradually rise from the front end to the rear end.

This engagement pin 127a is engaged with a recess 126a on one end side of the rotary lever 126, and the front and rear cam grooves 127b are engaged with each other.
, 127d are the engagement pins 7 at the front and rear of the tray carrier 70.
6.78 respectively. The slide cam lever 127 is fixed perpendicularly to the chassis 3 by screws or the like at one end of the chassis 3, and is restrained from standing up by the side plate 4, which stands upright, so that it can freely slide back and forth in the front-rear direction on the chassis 3. It is arranged in

The slide cam lever 128 located on the right side of the figure is formed into a long rectangular plate shape and stands upright, and has an engagement pin 128a hanging downward in a recess formed at the rear of the bottom surface. Cam grooves 128b, 128 formed in the curved rear part of the side surface so as to gradually descend from the front end to the rear end side.
c, 128d is formed. This engagement pin 128a is engaged with a recess 126b on the other end side of the rotating lever 126, and the front and rear engagement pins 86, 88 of the tray carrier 80 are inserted into the front and rear cam grooves 128b, 128d. The engaging pins 107 of the LD chuck plate 100 are respectively engaged with the cam grooves 128c.

Further, a cam notch 128e is formed between the cam grooves 128b and 128c in the upper part of the slide cam lever 128, and is inclined in the same direction as the cam groove 128a. The engagement pin 89 of the adjustment lever 88 is engaged with the cam surface of the cam notch 128e.

The slide cam lever 128 is fixed to the other end of the chassis 3 with screws or the like perpendicularly to the chassis 3, and is restrained from standing by the side plate 5, which stands upright, so that it can freely slide back and forth in the front-rear direction on the chassis 3. It is arranged in

G, 4. Configuration of Differential Gear (FIGS. 4 and 5) A vertically long cylindrical differential gear 130 that reciprocates the disk tray IO in the horizontal direction is connected to the protruding piece 71 of the tray carrier 70.
It is rotatably supported so as to hang down from the lower surface of a.
A large-diameter upper pinion 131 that engages with the rack 18 of the disk tray IO with a part of the gear portion exposed on the side of the upright piece 72 of the tray carrier 70;
A cylindrical body part 132 that is integrally formed on the lower surface side and has a concave notch 132a extending vertically on the circumferential surface, and an upper gear of a control cam plate 150 that is integrally formed in the lower part of this body ff1132 and that will be described later. The lower pinion 133 has a small diameter and meshes with the portion 153. Note that a part of the body portion 132 of this differential gear 130 and the lower pinion 13
3 is the chassis 3 when the tray carrier 70 is lowered.
It is designed to be housed in a cylindrical portion 3E formed in the cylindrical portion 3E.

G16. Configuration of servo member (FIGS. 1 and 4) The optical pickup 50 is made to follow the curvature of the surface of each of the LD and CD disks held by each drive device 20.30 to control the skew angle thereof.

The skew servo member 140 to be adjusted is formed into a substantially T-shaped plate, and rotates in the vertical direction via a shaft 142 between a pair of brackets 141 and 141 fixed on both sides of the midway portion on the chassis 3. I support you to do so. The front end of this skew servo member 140 has a cam follower 143 that engages with a second cam groove 152 of a control cam plate 150, which will be described later. In addition, the skew servo member 1
At the rear end of 40 is a support pin 6 of the pickup main body 53.
It has an adjustment bar 144 that comes into contact with and separates from zero.

G16. Structure of the guide member (FIGS. 6 to 8) The control cam plate 150 that controls and interlocks the carrier drive mechanism 120, the differential gear 13Q, and the skew servo member 140 is formed in a disk shape, and It is rotatably supported by a support pin 122 of a drive mechanism 120. A substantially heart-shaped first cam groove 151 is formed on the inner peripheral side of the upper surface of the control cam plate 150, and
An annular second cam groove 152 is formed on the outer circumferential side thereof. Further, an upper gear part 153 is formed at the upper part of the outer circumferential surface of the control cam plate 150 over an angle of about 177 degrees, and a lower gear part 154 is formed at the lower part thereof over the entire circumference.

The first cam groove 151 is a tray loading/unloading groove 151a.
, a carrier vertical movement groove 151b, and a skew adjustment groove 151c.

G, 7. Configuration of the drive mechanism for the guide member (FIG. 4) The drive mechanism 160 that drives the control cam plate 150 includes a motor 162 as a drive source fixed to the chassis 3 and having a drive pulley 161 on its rotating shaft; It is comprised of a deceleration device 163 that decelerates the driving force and transmits it to the control cam plate 160.

This speed reduction device 163 includes the control cam plate 150
A first gear 164 having a small diameter pinion 164a that meshes with the lower gear portion 154 of The driven pulley 166 has a driven pulley 166. A belt 167 is provided between the driving pulley 161 and the driven pulley 166.
is set up.

Incidentally, an LD is mounted on the disk tray 10 at a predetermined position on the bottom plate 3' below the opening 3A of the chassis 3.

Optical sensor 17 that determines whether any CD is placed
0 is placed. Further, an opening 2a opened at the front of the player main body 2 is opened and closed by a lid 171. Further, on the front of the player body 2, a power switch 172. Tray open/close button 1 for LD
73. CD tray open/close button 174. Play/Bose button 175. A stop button 176 and the like are provided.

G+s, Operation of the Embodiment (Figs. 14 to 25) According to the disc player l of the above embodiment, when playing back the LD8, the power switch 172 is turned on and the tray open/close button for the LD is pressed. 173, the drive mechanism 160 moves the control cam plate 1 as shown in FIG.
50 and the differential gear 130 rotate in the direction of the arrow in the figure.

As a result, the disc tray lO is inserted into the fifteenth position from the opening 2a of the player main body 2 via the rack 18 of the disc tray 10 that meshes with the upper pinion 131 of the differential gear 13.
．． As shown in FIG. 16, almost the entire portion is pulled out (ejected).

From this ejected state, when the LD8 is placed on the dog scratcher placement section 11 and the button 173 is pressed again, the control cam plate 150 moves approximately 177 degrees in the opposite direction, as shown in the timing charts of FIGS. 23 and 14. By rotating the disc tray 10, the disc tray 1O is drawn into the player main body 2 and stored (loaded) as shown in FIG. Then, when the control cam plate 150 further rotates, the differential gear 130 stops and the control lever 12
4 slides backwards. As a result, the rotating lever 12
6 rotates in the direction of the arrow in FIG.
As the tray carriers 28 slide forward, the pair of tray carriers 70 and 80 are lowered. Along with this descent, the disk tray 10 changes from the state shown in FIG. 20 to the 21st position.
The LD 8 is lowered to the state shown in the figure, and the LD 8 placed on the disk tray IO is moved to the turntable 2 of the LD drive device 20.
3 and the chuck 104 of the chuck plate 100 that descends together with the pair of tray carriers 70 and 80.

Next, when the play/pause button 175 is pressed, the drive device 20
As the spindle motor 21 rotates at high speed, the optical pickup 50 slides in the radial direction of the LD 8 via the guide shaft 31 by the feed mechanism 63 and reads the information, thereby reproducing the LD 8. At this time,
The skew servo member 140 is rotated forward and backward of the control cam plate 150 so as to follow the bending (warpage) of the LD8.
The pickup main body 53 is rotated in the vertical direction by rotating in the vertical direction about the shaft 142 as shown in FIG. As a result, the skew angle (optical axis angle) of the optical pickup 50 is adjusted, and the pickup main body 5
The focal point of the laser beam from the objective lens 58 of No. 3 on the LD 8 spreads in an elliptical shape, and there is no possibility that the image quality will deteriorate due to crosstalk.

In addition, when playing a CD9, the CD drive device 30, which had been retracted to one tray carrier 80 side during playback of the LD8, is moved along the guide shaft via the feeding mechanism 40.
Slide it to the loading position of D9 and lock the position. That is, as shown in FIG.
When the pinion 48 is rotated clockwise in the figure by driving the motor 42 of 0, the rack 41h meshed with the pinion 48 is horizontally moved toward the LD drive device 20 side.

When the rack 41 moves until the end of the elongated hole 41a of the rack 41 on the tray carrier 80 side hits one of the screws 44, the coil spring 45 causes the transport body 32 of the CD drive device 30 to be horizontal to the guide shaft 31. (flat surface) is locked to prevent it from wobbling. Further, the shaft 38 at the lower part of the transfer body 32 is connected vertically (
It is locked to prevent wobbling in the vertical direction. The position of the transport body 32 locked to this guide shaft 31 is the correct loading position of the CD 9.

From this state, the disc tray 10 is ejected in the same manner as described above, and as shown in FIG. To ensure chucking between a turntable 34 of No. 30 and a chuck 111 of a chuck plate I10. Then, similarly to the reproduction of the LD 8, the CD 9 is reproduced by moving the optical pickup 50 in the radial direction of the CD 9 via one guide shaft 31 and reading the information.

In this way, the CD drive device 30 is connected to the optical pickup 5.
The CD loading position of the CD drive device 30 is precisely positioned and locked simply by horizontally moving the slide guide shaft 31, thereby reliably preventing mischucking of the CD9 and improving the playback characteristics of the CD9. can be further improved.

Further, since the optical pickup 50 and the CD drive device 30 are moved horizontally to the guide shaft 31, the structure is extremely simple and low cost, and the CD drive device 30 is moved horizontally to the guide shaft 31.
When the player moves, it does not require a large space vertically as in the conventional case, so the player main body 2 can be made thinner.

H2 Effects of the Invention As described above, according to the present invention, there is provided a guide shaft on which a drive device for a small-diameter disk and an optical pickup are arranged so as to be movable back and forth, and a guide shaft in which the drive device is placed close to the optical pickup.
a feeding mechanism that moves releasably, and an elastic member is interposed between the feeding mechanism and the driving device to urge the driving device to a loading position of the small diameter disk of the guide shaft. As a result, it is possible to accurately and smoothly position and lock the small-diameter disk drive device to the loading position of the small-diameter disk, thereby preventing mischucks of the small-diameter disk and significantly improving the playback characteristics of the small-diameter disk. Can be done.

In addition, since the optical pickup and drive unit for small-diameter discs are moved horizontally on the guide shaft, the structure is extremely simple and low cost, and when the drive unit for small-diameter discs moves, it can be moved horizontally on the guide shaft. Since the player does not require a large space above and below, the player body can be made even thinner.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the vicinity of a CD drive device of a disc player showing an embodiment of the present invention, FIG. 2 is a plan view of a disc tray, FIG. 3 is a front view showing the internal structure of the disc player, and FIG. The figure is a plan view showing the internal structure at the end of the skew servo, Fig. 5 is an exploded perspective view of the differential gear and cam plate, Fig. 6 is an exploded perspective view of the internal structure, and Fig. 7 is a plan view of the cam plate. Figure 8 is a cross-sectional explanatory diagram of the cam groove of the cam plate, and Figure 9 is a CD
10 is a front view of the CD drive device, FIG. 11 is a plan view of the CD drive device and its feeding mechanism, and FIG. 12 is a side view of the optical pickup.
Fig. 13 is a front view of the optical pickup, Fig. 14 is an explanatory diagram of a timing chart of the cam plate, Fig. 15 is a plan view showing the LD eject state, Fig. 16 is a side view showing the LD eject state, and Fig. 17 is a side view showing the LD eject state. The figure is a plan view showing the CD ejected state, Fig. 18 is a partial side view showing the disc tray retracted state, Fig. 19 is a partial side view showing the disc tray storage state, and Fig. 20 is the disc tray storage state. 21 is a side view showing the LD chucking state, FIG. 22 is a plan view showing the interconnection of the main mechanisms when pulling out the disk tray, and FIG. 23 is a side view showing the main components when storing the disk tray. A plan view showing the interconnection of each mechanism;
Fig. 24 is a plan view showing the interlocking relationship of the main mechanisms when chucking is completed, Fig. 25 is a plan view showing the interlocking relationship of the main mechanisms when the skew servo is completed, and Fig. 26 is a conventional disk tray drawer. FIG. 27 is an overall perspective view showing the conventional disc tray retracted state;
Fig. 28 is an internal schematic explanatory diagram showing the LD chucking state of the conventional example, Fig. 29 is an internal schematic explanatory diagram showing the CD chucking state of the conventional example, and Fig. 30 is a perspective view of each drive device of the conventional example. be. 1... Disc player, 2... Player body, 2
a... opening, 8... LD (large diameter disk), 9...
...CD (small diameter disc), lO...disk tray, large section, 20...LD drive device, 30...CD drive device, 31...guide shaft, 40...feeding mechanism,
45... Coil spring (elastic member), 50... Optical pickup. ,p te7z7i-L-i0,000iaguchi Figure 2 Figure 5 Figure 7 Figure 8 Figure 1O Figure 15 Figure 16 Figure 29 Figure 60

Claims (1)

[Scope of Claims] A disk tray that is horizontally disposed in and out of an opening formed in the front surface of the player body and that conveys a large-diameter disk or a small-diameter disk into the player body; A disk player comprising drive devices for large-diameter disks and small-diameter disks that are provided to rotate each of the disks, and an optical pickup that is provided between each of the drive devices in the player main body to read information on each of the disks. A guide shaft on which the drive device for the small-diameter disk and the optical pickup are arranged so as to be movable back and forth, and a feeding mechanism that moves the drive device toward and away from the optical pickup, the feeding mechanism and the drive A disc player characterized in that an elastic member is interposed between the drive unit and the drive unit to urge the drive unit to a loading position of the small-diameter disc of the guide shaft.