JPH09120613A - Optical disk apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a wrong insertion and secure safety by operating a loading mechanism only when a normal disk cartridge is correctly set on a cartridge- loading stage. SOLUTION: A wrong insertion prevention lever 61 is urged by a torsion coil spring 64 as a rotation-urging means to rotate in a direction of an arrow (f) which is the inner side of a cartridge insertion guide 22. When a projection 61c formed integrally with a base part 61a of the prevention lever 61 is pressed in touch with a stopper 65 united with an upper part of a wrong insertion prevention lever-fitting means 62 from the (f) direction, a rotational angle of the prevention lever 61 in the (f) direction is regulated.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The technical field to which the present invention pertains is
Recording (writing) and / or reproduction (reading) using so-called optical disks such as optical disks and magneto-optical disks
It is an optical disk device for performing.

[0002]

2. Description of the Related Art Conventionally, in an optical disk device for recording and / or reproducing a so-called optical disk such as an optical disk such as a CD or a CD-ROM or a magneto-optical disk such as an MO, an optical disk is mounted on a disk table of a spindle motor. While it is mounted horizontally and driven to rotate, the objective lens of the optical pickup vertically irradiates the optical disc with a laser beam, etc. from below, while moving the objective lens horizontally along the radiation from the center of the optical disc. , Recording and / or reproducing optical discs.

At this time, in the conventional cartridge type optical disk device, a disk cartridge in which an optical disk is housed is loaded by a loading mechanism so as to be automatically drawn onto the cartridge mounting base.

[0004]

However, in the conventional cartridge type CD-ROM drive and the like, the detecting means for identifying the similar disk cartridge is not provided.

Therefore, the conventional cartridge type CD-R
In the OM drive and the like, when a similar disc cartridge is inserted on the cartridge mounting base, there is a risk that the loading mechanism may erroneously load the similar disc cartridge, like a regular disc cartridge.

Incidentally, if a similar disc cartridge is loaded by mistake, an accident such as destruction of data on the optical disc in the cartridge may occur, which is a serious problem.

The present invention has been made to solve the above-mentioned problems, and can prevent erroneous insertion of a legitimate disk cartridge on the cartridge mounting table and prevent the loading of a similar disk cartridge. An object is to provide an optical disk device.

[0008]

The optical disk device of the present invention for achieving the above object prohibits erroneous insertion of a regular disk cartridge (for example, erroneous insertion in the front-reverse direction) onto the cartridge mounting table. Equipped with an erroneous insertion prevention unit and a disc type discrimination switch operated by the erroneous insertion prevention unit, and the disc type discrimination switch is operated by the erroneous insertion prevention unit only when a proper disc cartridge is properly inserted on the cartridge mounting table. The loading mechanism is operated to operate.

In the optical disk device of the present invention having the above-mentioned structure, the erroneous insertion preventing means can prevent the erroneous insertion of the regular disk cartridge on the cartridge mounting table. Then, only when the legitimate disc cartridge is correctly inserted on the cartridge mounting base, the disc type discriminating switch is operated by the erroneous insertion preventing means, and the legitimate disc cartridge is automatically mounted on the cartridge mounting base by the loading mechanism. Since the loading is performed so as to be pulled in, when a similar disc cartridge is erroneously inserted on the cartridge mounting table, the loading mechanism does not operate and the similar disc cartridge is not erroneously loaded.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an optical disk device to which the present invention is applied will be described below with reference to the drawings. In addition, this optical disk device is a CD or CD-RO with a diameter of 12 cm.
This is a disc cartridge type optical disc device in which an optical disc such as M is housed in a disc cartridge and the disc cartridge is automatically loaded into the optical disc device to reproduce (read) data of the optical disc.

[Description of Disc Cartridge] First, as shown in FIGS. 1 to 3, 16, 17, 20, and 24 to 31, the optical disc 1 is a flat and substantially rectangular disc cartridge 2. It is rotatably housed inside, and inside the disc cartridge 2, a disc clamper 3 is provided directly above the center hole 1a of the optical disc 1.
Is erected so as to be movable within a certain range in the vertical, horizontal, and front-back directions. On the bottom surface 2c of the disk cartridge 2, an elongated hole-shaped bottom surface opening 4 is formed along the disk center P ₁ from the center hole 1a of the optical disk 1 to the front end edge 2a of the disk cartridge 2.
A shutter 5 that opens and closes the bottom opening 4 is slidably mounted along the front edge 2a in the directions of arrows a and a'that are perpendicular to the cartridge center P ₁ , and the shutter 5 is built in. The shutter spring (not shown) is urged to slide to the closed position in the arrow a'direction. A pair of left and right positioning holes 6 are formed on the bottom surface 2c of the disc cartridge 2 on the left and right sides on the rear edge 2b side, and a pair of left and right positioning holes 6 on the left and right side surfaces 2d on the front edge 2a side. Engaging hole 7 is formed.

"Overview of Optical Disk Device" Next, referring to FIG.
6, as shown in FIGS. 24 to 31, the optical disk device 10
Is a chassis 11 formed by a thick metal plate or the like and integrally formed with a pair of left and right vertical left and right side plates 11a.
And a pair of upper and lower covers 12 formed by thin sheet metal and attached to cover the upper and lower sides and left and right sides of the left and right side plates 11a of the chassis 11, and a pair of covers 12 formed of synthetic resin so as to cover the front end of the chassis 11. The front panel 13 is formed into a flat rectangular box shape. A horizontally long cartridge insertion opening 14 is horizontally formed on the upper side of the front panel 13, and an opening / closing lid 15 that opens and closes the cartridge insertion opening 14 by an outward opening method is rotatably attached to the front panel 13. Has been.

As shown in FIG. 16, the optical disk device 10 is characterized by the features of various configurations described later.
Thickness H is 25.4 mm (1 inch) or less and width W is 1
It is configured as a small optical disk device having a depth D of 46.0 mm or less and a depth D of 20.8 mm or less.

"Explanation of Cartridge Mounting Base" Next, referring to FIG.
As shown in FIGS. 6 to 18 and 20 to 31, the cartridge mounting table 21 formed of a thick metal plate or the like is located at the upper position between the left and right side plates 11a of the chassis 11 and at the same height as the cartridge insertion port 14. Are arranged horizontally.
A pair of left and right cartridge insertion guides 22 having a substantially L-shaped cross section are provided at the upper portions of the left and right side edges of the cartridge mounting table 21.
Arrow b, which is the loading direction and the eject direction of
It is integrally formed in parallel with the b'direction. The four insulators 23, which are shock absorbers made of elastic material such as rubber, are vertically attached to the four insulator attachment portions 24 integrally formed on the left and right side plates 11a of the chassis 11. The positions near the four corners of the cartridge mounting table 21 are horizontally placed on the upper portions of the four insulators 23 and elastically installed. In addition, the four insulators 23
Are connected to the bottom surface of the cartridge mounting table 21 by four setscrews 25 that are floated with respect to the four insulator mounting portions 24.

The shutter opening / closing lever 26 is provided with a vertical fulcrum pin 27 at a position deviated toward the arrow b direction which is the loading direction above the cartridge mounting table 21.
It is mounted rotatably in the directions of arrows c and c'within the horizontal plane centering around. A vertical shutter opening / closing roller 28 is attached to the tip of the shutter opening / closing lever 26, and the shutter opening / closing lever 26 is moved from the open position shown by the solid line in FIG. It is rotationally biased in the direction of arrow c'to the closed position shown by the dotted line. The chassis 11
Between the left and right side plates 11a, a printed circuit board 30 forming a circuit board is horizontally screwed to a position below the cartridge mounting table 21.

[Description of Cartridge Loading Mechanism]
Next, as shown in FIGS. 16 to 31, a loading mechanism 31 for horizontally loading and ejecting the disk cartridge 2 on the cartridge mounting base 21 from the directions of the arrows b and b ′ is provided with an arrow b above the cartridge mounting base 21.
It is attached at a position offset to the direction side.

The loading mechanism 31 is attached to one side of the upper portion of the cartridge mounting table 21 and is indicated by an arrow between a retracted position shown by a solid line in FIG. 20 and an advanced position shown by a one-dot chain line in FIG. A slider 32 that slides in the directions b and b ', and a cartridge locking lever 34 that is rotatably attached in the directions of arrows d and d'in a horizontal plane via a fulcrum pin 33 that is perpendicular to the upper portion of the slider 32.
The cartridge locking lever 34 is urged to rotate in the direction of arrow d by a torsion coil spring 35 which is a rotation urging means.

The loading mechanism 31 has a motor mounting plate 36 on the other side of the upper portion of the cartridge mounting base 21.
It has a loading motor 37, which is one driving source vertically attached downwardly via a motor, and a gear train 38 and a pinion 39, which are rotationally driven by the loading motor 37 in the forward and reverse directions, are provided under the motor mounting plate 36. It is installed.

The loading mechanism 31 has a horizontal slide plate 40 which is formed of a thin metal plate or the like and is closely attached to the bottom surface of the cartridge mounting table 21, and the slide plate 40 has a plurality of guides. The cartridge mounting table 21 is guided by the pin 41 and the guide hole 42.
On the other hand, it is horizontally slidable in the directions of arrows b and b '. The pinion 39 is meshed with the rack 43 fixed to the end of the slide plate 40 on the arrow b direction side.

The loading mechanism 31 also has a substantially L-shaped conversion lever 45 mounted rotatably in the directions of arrows e and e'in a horizontal plane via a fulcrum pin 44 which is perpendicular to the upper portion of the cartridge mounting table 21. doing. A drive pin 46 vertically attached to one end of the conversion lever 45 is loosely fitted in a drive pin engagement hole 47 formed in the slider 32 in a direction perpendicular to the directions of arrows b and b '. . Then, a cam driven roller 48, which is vertically attached to the lower portion of the other end of the conversion lever 45, is inserted through an arc-shaped insertion hole 49 formed in the cartridge mounting base 21 and is projected below the cartridge mounting base 21. And
The cam driven roller 48 is loosely fitted in a cam hole 50 formed in the slide plate 40. The conversion lever 45 is rotationally biased in the arrow e'direction by a torsion coil spring 51, which is a rotation biasing means, and the slider 32 slides in the arrow e'direction via the drive pin 46 and the drive pin engagement hole 47. Being energized.

A disc insertion detection switch 53 for detecting insertion and ejection of the disc cartridge 2 onto the cartridge mounting base 21 by sliding the slider 32 in the directions of arrows b and b'is attached to the cartridge mounting base 21.

[Explanation of erroneous insertion preventing means and disc type discriminating switch] Next, as shown in FIGS. 12 to 14, FIG. 17, FIG. 18 and FIG. 20, erroneous insertion of the disc cartridge 2 onto the cartridge mounting table 21. An erroneous insertion prevention lever 61 formed of synthetic resin or the like, which constitutes the insertion prevention means, is displaced on one side of the cartridge mounting base 21 slightly to the arrow b'direction side from the central position in the arrow b, b'direction. It is installed in the specified position. At this time, the erroneous insertion preventing lever 61 has a fulcrum pin 63 in which a base portion 61a on the arrow b direction side is perpendicular to the upper portion of the erroneous insertion preventing lever mounting portion 62 that horizontally extends outward from one side edge of the cartridge mounting table 21. Is attached rotatably in the directions of the arrows f and f ′ in the horizontal plane via
The tip 61 of the erroneous insertion prevention lever 61 on the arrow b'direction side
b is configured to be able to move in and out of one of the cartridge insertion guides 22 of the cartridge mounting table 21 in the directions of arrows f and f '.

The erroneous insertion prevention lever 61 is rotationally biased in the direction of the arrow f, which is the inner side of the one cartridge insertion guide 22, by a torsion coil spring 64 which is a rotational biasing means. Then, this erroneous insertion prevention lever 61
The protrusion 61c formed integrally with the base portion 61a of the above is brought into contact with the stopper 65 formed integrally with the upper portion of the erroneous insertion prevention lever mounting portion 62 in the direction of the arrow f, whereby the arrow f of the erroneous insertion prevention lever 61 is formed. The rotation angle in the direction is regulated.

A disc type discriminating switch 66 is attached to an upper portion of the erroneous insertion prevention lever attachment portion 62 at a position outside the tip 61b of the erroneous insertion prevention lever 61.

[Description of Lifting Mechanism of Spindle Motor and Positioning Pin] Next, FIGS. 5 to 10, 18 to 25,
As shown in FIG. 30, the spindle motor 72 and the pair of left and right positioning pins 77 are attached to the cartridge mounting table 21.
An elevating mechanism 71 for moving up and down in the directions of arrows g and g'is attached by a hanging method at the lower part of the cartridge mounting table 21 at a position deviated in the direction of arrow b '.

First, a disk table 73 is horizontally mounted on the upper end of a vertical motor shaft 72a of the spindle motor 72, and the spindle motor 72 is vertically mounted on an upper portion of a horizontal motor mounting plate 73. The spindle motor 72 is vertically attached to the upper portion of the central portion of a spindle motor elevating plate 75 formed of a thick metal plate or the like via a motor mounting plate 74. The spindle motor lifting plate 75 is arranged horizontally at a right angle to the directions of the arrows b and b '.

Positioning pin elevating plates 76 are arranged in parallel and horizontally on the arrow b'direction side of the spindle motor elevating plate 75. A pair of positioning pins 77
Are fixed vertically.

Then, these spindle motor lifting plates 7
5 and the arrow b at the left and right ends of the positioning pin lifting plate 76,
A total of four guide shafts 78 and 79 are attached in a direction perpendicular to the b'direction, and each pair is a horizontal cam follower. In addition, at the intermediate position of each pair, a total of four guide shafts 78 and 79, a pair of left and right guide shafts 80, which are cam followers, are provided between the left and right ends of the spindle motor elevating plate 76 and the positioning pin elevating plate 76. Are arranged in parallel with the guide shafts 78 and 79. And
The pair of left and right guide shafts 80 are fixed to one of the spindle motor lifting plate 75 and the positioning pin lifting plate 76, and the other is rotatable around the pair of left and right guide shafts 80 in the directions of arrows h and h '. Is attached to.

A total of six vertical guides 8 are provided at the left and right sides of the lower portion of the cartridge mounting table 21 so that the pair of left and right pairs are provided.
1, 82, 83 are integrally formed, and a total of six guide shafts 78, 79, 80 are vertically movable in the vertical guide grooves 84, 85, 86 formed in them so as to be vertically movable in the directions of arrows i, i '. It is fitted. At the left and right edges of the cartridge mounting table 21, a pair of left and right guide shafts 78 in total,
A pair of left and right spring retaining portions 87, 88, 89 are formed integrally at positions corresponding to the upper portions of 79, 80, respectively. Then, a pair of left and right sides, which are vertical urging means vertically disposed between the left and right side ends of the total of six spring locking portions 87, 88, 89 and the guide shafts 78, 79, 80, The upper and lower ends of a total of six tension coil springs 90, 91 and 92 are locked. However, the lower ends of the pair of left and right tension coil springs 91 are locked to the pair of left and right spring locking portions 79a integrally formed on the left and right end edges of the positioning pin lifting plate 76 on the axis of the pair of left and right guide shafts 79. ing.

Therefore, a total of six guide shafts 78, 79,
The spindle motor elevating plate 75 and the positioning pin elevating plate 76 move in parallel by the guiding action of the 80 and the vertical guide grooves 84, 85, 86, and the cartridge mounting table 2
The spindle motor lifting plate 75 and the positioning pin lifting plate 76 are movably installed in the lower part of 1 in the up and down directions of arrows i and i ′ by a total of six tension coil springs 90, 91 and 92. The cartridge mounting table 21 is biased upward in the directions of arrows i and i '.

The cartridge mounting base 21 and the slide plate 40 are provided with elongated hole-shaped central openings 93 and 94 along the centers P ₂ and P ₃ , respectively, and the cartridge mounting base 21 has an arrow b '. A pair of left and right positioning pin insertion holes 95 are opened at both left and right positions of the end on the direction side.

Then, the spindle motor 72 and the disc table 73 at the upper end thereof are inserted through the ends of the central openings 93, 94 in the direction of the arrow b ', and the cartridge mounting table 21 is inserted.
It is configured so that it can be vertically moved up and down in the directions of arrows i and i '. Further, the pair of left and right positioning pins 77 pass through both the left and right sides of the slide plate 40, and are inserted through the pair of left and right positioning pin insertion holes 95, so that the cartridge mounting table 2
It is constructed so that it can be vertically moved up and down in the direction of arrows i and i '.

A pair of left and right pairs formed of synthetic resin or the like on the lower surface of the slide plate 40 at a position right above the six guide shafts 78, 79, 80, a total of six first and second pairs. The slide cams 96, 97, 98 are fixed, and the guide shafts 78, 79, 80 are attached to the lower surfaces of the slide cams 96, 97, 98 by the tension coil springs 90, 90.
It is pressed in parallel from the arrow i direction by 91 and 92. At this time, a pair of left and right, four slide cams 9 in total
6, 97 are spindle motor 72 and positioning pin 77
And a pair of left and right slide cams 98 are configured as a second slide cam that adjusts the inclination of the spindle motor 72.

On the lower surface of the first and second slide cams 96, 97, 98 in total, there are high places 96a, 97a, 98a and low places 96 at both ends in the directions of arrows b, b '.
b, 97b, 98b are formed, and slopes 96c, 97c, 98c are formed in the intermediate portions thereof.

[Description of Optical Pickup] Next, FIG.
~ As shown in FIGS. 25 and 31, the optical pickup 10
Reference numeral 1 indicates that an objective lens 103 and a light reflection type skew sensor 104 are vertically mounted on the upper surface of a carriage 102 in an upward direction, and an optical block 105 for transmitting / receiving a laser beam to / from the objective lens 103 is integrally coupled to a side surface of the carriage 102. ing.

Then, inside the central opening 94 of the slide plate 40, a pair of left and right guide shafts 106 parallel to the center P ₂ are horizontally attached at both left and right positions of the central opening 93 on the bottom surface of the cartridge mounting table 21, The carriage 102 is installed inside the cartridge mounting base 21 and the central openings 93 and 94 of the slide plate 40 so that the pair of left and right guide shafts 10 are provided.
It is mounted so as to be horizontally movable in the directions of arrows b and b'by being guided by 6. At this time, each pair of shaft mounts 10 holding both ends of both guide shafts 106 in the directions of arrows b and b ′.
7 are fixed to the bottom surface of the cartridge mounting base 21 from below by set screws 108.

[Description of Carriage Moving Mechanism] Next, referring to FIG.
7 to 21, the carriage moving mechanism 111 for moving the carriage 102 in the directions of the arrows b and b ′ along the pair of left and right guide shafts 106 is provided with the cartridge mounting table 21.
A carriage drive motor 112 attached to the bottom of the
The gear train 113 and the pinion 114, and a rack 1 mounted on one side of the carriage 102 in parallel with both guide shafts 106 and linearly driven by the pinion 114.
And 15.

[Description of Loading Operation of Disk Cartridge] Next, an operation of loading the disk cartridge 2 onto the cartridge mounting table 21 so as to be pulled horizontally will be described.

First, in the state before the loading is started, the shutter opening / closing lever 26 is rotated in the direction of arrow c'to the closed position shown by the one-dot chain line in FIG. 20, and the slider 32 and the cartridge are locked by the cartridge loading mechanism 31. The lever 34 is slid in the arrow b'direction to the forward position shown by the alternate long and short dash line in FIG.

As shown in FIGS. 5A and 24, the lifting mechanism 71 causes the spindle motor 75 and the pair of left and right positioning pins 77 to move to the cartridge mounting table 21.
The carriage 102 of the optical pickup 101 is moved to the original position on the arrow b direction side by the carriage moving mechanism 111.

Therefore, as shown in FIG. 24, the opening / closing lid 15 of the optical disk apparatus 10 is opened to open the disk cartridge 2 from the front end edge 2a side thereof to the cartridge insertion slot 1
4 is inserted horizontally in the direction of arrow b.

Then, the disc cartridge 2 is horizontally inserted in the upper part of the cartridge mounting base 21 from the direction of the arrow b while being guided between the pair of left and right cartridge insertion guides 22 as shown by the one-dot chain line in FIG.

The disk cartridge 2 is shown in FIG.
While being advanced in the direction of the arrow b on the cartridge mounting table 21 from the position indicated by the alternate long and short dash line to the loading completion position indicated by the solid line, the shutter open / close roller 28 of the shutter open / close lever 26 is moved by the arrow by the front edge 2a of the disk cartridge 2. By being pushed in the b direction, the shutter opening / closing lever 26 is rotationally driven in the arrow c direction against the torsion coil spring 29.

Then, the shutter opening / closing roller 28 pushes the one end 5a of the shutter 5 of the disk cartridge 2 in the direction of the arrow a, and the shutter 5 moves from the closed position shown by the one-dot chain line to the open position shown by the solid line in FIG. It is slid in the direction of arrow a against the built-in shutter spring,
The bottom opening 4 of the disc cartridge 2 is automatically opened.

On the other hand, when the disk cartridge 2 is inserted in the direction of arrow b to the loading start position shown by the chain double-dashed line in FIG. 20, its front end edge 2a abuts on the front end portion 32a of the slider 32, and this slider 32 is moved. The disk insertion detection switch 53 is turned on by slightly pushing in the direction of arrow b against the torsion coil spring 51.

Almost at the same time, the locking claw 34a at the tip of the cartridge locking lever 34 in the direction of the arrow b 'rides on one side surface 2d of the disc cartridge 2 and is formed on the side of the front edge 2a of the side surface 2d. It is automatically locked in the locking hole 7 (see FIG. 17). At this time, the cartridge locking lever 34 is twisted by the torsion coil spring 35.
By the synergistic action with
The locking claw 34a is automatically locked in the locking hole 7 by reciprocating rotation in the d'direction.

Then, the loading motor 37 of the loading mechanism 31 is driven in the forward rotation by the detection signal from the disc insertion detection switch 53, and the gear train 38.
The rack 43 of the slide plate 40 is linearly driven in the direction of the arrow b ′ by the pinion 39 which is positively rotated via the
The slide plate 40 is slid in the arrow b'direction from the retracted position shown in FIG. 22 to the advanced position shown in FIG.

Then, the cam driven roller 48 of the conversion lever 45 is driven by the cam hole 50 of the slide plate 40 which is slid in the direction of the arrow b ', so that the conversion lever 45 moves from the position shown by the one-dot chain line in FIG. The conversion lever 4 is driven to rotate to the position shown by the solid line in the direction of arrow e.
The drive pin 46 of No. 5 drives the slider 32 through the drive pin engagement hole 47, and this slider 32 is moved to the position shown in FIG.
It is slid in the direction of arrow b from the forward position shown by the dashed line to the retracted position shown by the solid line.

Then, the locking claw 3 of the cartridge locking lever 34 is moved integrally with the slider 32 in the direction of arrow b.
20. The disk cartridge 2 is automatically loaded by 4a onto the cartridge mounting base 21 from the direction of arrow b to the loading completion position shown in FIG.

When the disc cartridge 2 is loaded onto the cartridge mounting table 21 in the direction of the arrow b, the objective lens 103 and the skew sensor 104 of the optical pickup 101 are moved to the disc cartridge as shown in FIGS. 2 bottom opening 4
It is relatively inserted in the direction of the arrow b '.

On the other hand, when the slide plate 40 is slid in the direction of the arrow b ', a total of six first and second slide cams 96, 97 and 98 are combined into a total of six guide shafts 78 and 7.
9 and 80 are horizontally moved in the arrow b'direction from the position shown in FIG. 5A to the position shown in FIG.
A total of six guide shafts 78, 79, 8 are biased upward by a total of six tension coil springs 90, 91, 92.
0 is guided by a total of six vertical guide grooves 84, 85, 86, and a total of six first and second slide cams 96,
From the low parts 96b, 97b, 98b of 97, 98, the slopes 96c, 97c, 98c are slid up to the high parts 96a, 97a, 98a in the direction of arrow i.

Then, as shown in FIGS. 25, 28 and 30, the spindle motor lifting plate 75 and the positioning pin lifting plate 76 allow the spindle motor 72 and the pair of left and right positioning pins 77 to reach above the cartridge mounting table 21 by the arrow i. The pair of left and right positioning pins 77 are vertically engaged in the pair of left and right positioning holes 6 of the bottom surface 2c of the disc cartridge 2 from the direction of arrow i, so that the disc cartridge 2 is mounted on the cartridge mounting table 21.
It is accurately positioned at the upper loading completion position.

On the other hand, at the same time, the spindle motor 7
The disc table 73 at the upper end of the disc cartridge 2 is vertically inserted from the arrow i direction into the end of the disc cartridge 2 on the arrow b direction side in the bottom opening 4, and the optical disc 1 in the disc cartridge 2 is inserted into the disc table 2 by the central hole 1a. 7
The optical disc 1 is mounted on the outer periphery of the centering guide 73a at the center of the optical disc 3, and is horizontally raised in the direction of arrow i by the disc table 73 to the upper and lower intermediate positions in the disc cartridge 2 and is also moved by the disc clamper 3. The optical disc 1 is the disc table 73
Magnetically chucked on top.

As described above, a loading completion switch (not shown) for detecting the position of the slide plate 40 after the series of loading operations of the disc cartridge 2 is completed.
Thus, the loading motor 37 is automatically stopped.

"Optical Disk Reproducing Operation" After this loading operation, the optical disk 1 is rotationally driven at a high speed by the spindle motor 72 in response to a reproducing command signal from the host computer and the optical pickup is carried out by the carriage moving mechanism 111. The carriage 102 of 101 is the bottom opening 4 of the disk cartridge 2.
The objective lens 103 is moved in the directions of arrows b and b '
Is the cartridge center P ₁ of the optical disc 1, and the arrows b, b ′ are arranged along the radiation from the center of the optical disc 1.
Is moved in the direction.

The laser beam transmitted from the optical block 105 of the optical pickup 101 is applied to the lower surface of the optical disk 1 by the objective lens 103, and the reflected light is received by the optical block 105 through the objective lens 103. The data on the optical disc 1 is reproduced.

In the carriage moving mechanism 111, the pinion 114 driven by the carriage driving motor 112 through the gear train 113 is rotated in the forward and reverse directions.
By linearly driving the carriage 5, the carriage 102 is horizontally moved along the pair of left and right guide shafts 106 in the directions of arrows b and b ′.

"Disk Cartridge Eject Operation" When the loading motor 37 of the cartridge loading mechanism 31 is reversely rotated by the eject command signal from the host computer after the data of the optical disk 1 is reproduced, the above-mentioned reverse operation at the time of loading is performed. By the operation, the slide plate 40 is slid back in the arrow b direction from the forward movement position shown in FIG. 23 to the backward movement position shown in FIG.

Then, a total of six guide shafts 78, 79,
A total of 6 first and second slide cams 9 for 80
6, 97, 98 are slid back in the direction of arrow b from the position shown in FIG. 5B to the position shown in FIG. 5A, and a total of 6 guide shafts 78, 79, 80 are pulled in total 6 A total of six high places 9 of the first and second slide cams 96, 97, 98 against the coil springs 90, 91, 92.
6a, 97a, 98a to slopes 96c, 97c, 98c
And slides down to the lower portions 96b, 97b, 98b in the direction of arrow i '.

Then, the spindle motor 72 is moved by the spindle motor lifting plate 75 and the positioning pin lifting plate 76.
And a pair of left and right positioning pins 77 are shown in FIG.
8 and FIG. 30 from the raised position, FIG.
29, and is vertically lowered in the direction of arrow i'to the lowered position shown in FIG. Then, the disc table 73 is removed from the center hole 1a of the optical disc 1 and lowered to the position below the disc cartridge 2 in the direction of arrow i ', and
The pair of left and right positioning pins 77 are also used for the disc cartridge 2.
It is separated from the pair of right and left positioning holes 6 and is lowered to a position below the disc cartridge 2.

Then, the slider 32 is rotated by the cam hole 50 of the slide plate 40 in the direction of arrow e'to move the slider 32 from the retracted position shown by the solid line in FIG. 20 to the forward position shown by the chain line in the direction of arrow b '. The disc cartridge 2 is automatically ejected in the direction of the arrow b'from the loading completion position shown by the solid line in FIG. 20 to the loading start position shown by the chain double-dashed line in FIG. . Then, the loading motor 37 is turned on by the eject completion switch 54 for detecting the position of the slide plate 40.
Is automatically stopped.

By this ejecting operation, the trailing edge 2b of the disc cartridge 2 is moved to the optical disc device 10
Since the disk cartridge 2 is projected to the outside of the cartridge insertion opening 14 in the direction of the arrow b ', the disk cartridge 2 can be completely pulled out to the outside of the cartridge insertion opening 14 after this ejecting operation.

At this time, the pulling force of the disc cartridge 2 in the direction of the arrow b'rotates the cartridge engaging lever 34 in the direction of the arrow d'against the torsion coil spring 35, so that the engaging claw 34a is rotated. The cartridge 2 is automatically disengaged from the engagement hole 7.

While the disk cartridge 2 is moved in the direction of arrow b'on the cartridge mounting table 21 from the loading completion position shown by the solid line in FIG. 20 to the position shown by the alternate long and short dash line, the shutter opening / closing lever 26 is moved to the position shown in FIG. 20 is rotated in the direction of arrow c'by the torsion coil spring 29 from the open position shown by the solid line to the closed position shown by the one-dot chain line, and the shutter spring having the shutter 5 of the disk cartridge 2 built therein is opened by the open line shown in FIG. The bottom position opening 4 of the disk cartridge 2 is closed again by the shutter 5 by being slid back from the cover position to the closed position indicated by the alternate long and short dash line in the direction of arrow a '.

By the way, the optical disk device 10 described above
Then, the carriage 102 of the optical pickup 101 is directly attached to the bottom surface, which is the lower portion of the cartridge mounting table 21, along the pair of horizontal left and right guide shafts 106, arrow b,
Since the optical pickup 101 is configured to be moved in the b'direction, it is not necessary to move the optical pickup 101 up and down with respect to the cartridge mounting table 21 in the directions of arrows i and i '.

Therefore, the cartridge loading mechanism 3
Large-sized and large-area cartridge mounting table 21 including 1
Can be configured to be suspended from the chassis 11 via four insulators 23, and the spindle motor 72 and the like can be moved up and down with respect to the cartridge mounting table 21 in the directions of the arrows i and i ′. Miniaturization and cost reduction can be achieved.

Then, as shown in FIG. 31, with the objective lens 103 and the skew sensor 104 attached to the carriage 102 inserted in the bottom opening 4 of the disk cartridge 2, the carriage 102 is horizontally moved in the directions of arrows b and b '. Since the optical disc device 10 can be moved to a lower position, the thinning of the optical disc device 10 can be promoted.

Further, as shown in FIG. 26, since the cartridge mounting base 21 is elastically supported by the chassis 11 via the four insulators 23, the suspension of the cartridge mounting base 21 on the chassis 11 is easy, It is possible to obtain the optical disk device 10 having high impact resistance.

[Description of Correct Insertion Prevention Operation of Regular Disc Cartridge] By the way, this optical disc device 10
As shown in FIG. 13, only when the proper disc cartridge 2 is properly inserted (indicates that the insertion is correct) onto the cartridge mounting table 21 from the front end edge 2a side in the direction of arrow b (the insertion is correct). The tapered surface 8 formed shallowly on the bottom surface side of the corner portion between the edge 2a and the left and right side surfaces 2d has a tip 61b of the erroneous insertion prevention lever 61.
Is abutted from the direction of arrow b.

With the insertion of the regular disc cartridge 2 in the direction of the arrow b, the guiding action of the tab surface 8 causes the erroneous insertion prevention lever 61 to move to the position shown in FIG.
Is rotated in the direction of the arrow f ′ against the torsion coil spring 64 from the position indicated by the solid line to the position indicated by the alternate long and short dash line, and the tip 61b of the erroneous insertion prevention lever 61 rides on one side surface 2d of the disc cartridge 2. Therefore, the normal insertion of the regular disk cartridge 2 in the direction of arrow b is allowed.

Only when the regular disc cartridge 2 is properly inserted into the cartridge mount 21 in this way, the disc type discriminating switch 66 is turned on by the erroneous insertion prevention lever 61 which is rotationally driven in the direction of the arrow f '. It

The cartridge loading mechanism 31 of the optical disk device 10 is equipped with the control circuit C1 shown in FIG.
When the regular disc cartridge 2 is inserted on the upper side, the AND motor 67 outputs the AND signal from the disc type discriminating switch 66 and the disc insertion detecting switch 53 to cause the loading motor 37 to rotate in the forward direction to load the disc cartridge 2 described above. Is configured to do.

[Explanation of Operation for Preventing Erroneous Insertion of Regular Disc Cartridge] Next, as shown in FIG. 14, the regular disc cartridge 2 is placed on the cartridge mounting table 21 from the rear edge 2b side or upside down. When it is mistakenly inserted from the direction of arrow b (meaning that the insertion is incorrect),
The rear end edge 2b and the front end edge 2a of the regular disc cartridge 2 where the tapered surface 8 is not formed are brought into contact with the tip 61b of the erroneous insertion prevention lever 61 from the direction of the arrow b.

At this time, the legitimate disc cartridge 2 tries to rotate the erroneous insertion prevention lever 61 in the direction of the arrow f, but the protrusion 61c of the erroneous insertion prevention lever 61 is provided with the stopper 6.
5 and the rotation of the erroneous insertion prevention lever 61 in the direction of the arrow f is locked, the erroneous insertion prevention lever 6
The numeral 1 prevents the erroneously inserted regular disk cartridge 2 from being inserted in the direction of arrow b.

[Explanation of Operation for Preventing Erroneous Insertion of Similar Disc Cartridge] By the way, also when a similar disc cartridge whose external dimensions are substantially the same as those of the regular disc cartridge 2 is inserted into the cartridge mounting table 21. As in the case of the erroneous insertion of the regular disc cartridge 2 described with reference to FIG. 14, the erroneous insertion prevention lever 61 can prevent the insertion of a similar disc cartridge.

That is, in this optical disk device 10, when the disk cartridge 2 is inserted into the cartridge mounting table 21, the control circuit C1 shown in FIG.
As shown in the flowchart of FIG. 15B, first,
First, the disc type discrimination switch 66 is turned on and off
Discriminates whether the disc cartridge inserted on the cartridge mounting table 21 is the regular disc cartridge 2 or a similar disc cartridge.

Next, the O of the disk insertion detection switch 52 is turned on.
After confirming that the regular disk cartridge 2 has been inserted to the loading start position indicated by the chain double-dashed line in FIG. The disk cartridge 2 is controlled so as to be automatically loaded to the loading completion position shown by the one-dot chain line in FIG.

Therefore, according to the optical disk device 10, it is possible to prevent the erroneous insertion of the regular disk cartridge 2 on the cartridge mounting table 21 and the loading of the similar disk cartridge, and to secure high safety. can do. At this time, the disc type discrimination switch 66 is turned on by the rotation of the erroneous insertion prevention lever 61 from the cartridge mounting base 21 in the direction of the arrow f ′ on the outside.
Since it is operated, the structure is simple and the operation is reliable. Further, since the loading motor 37 is normally rotated by the AND output of the disc insertion detection switch 52 and the disc type discrimination switch 66, loading of a similar disc cartridge can always be reliably prevented, and higher safety is achieved. Can be secured.

[Explanation of Skew Adjustment Mechanism] Next, referring to FIG.
A skew adjusting mechanism 121 for adjusting the inclination of the optical disc 1 with respect to the objective lens 103 of the optical pickup 101 will be described with reference to FIG.

In the skew adjusting mechanism 121, the pair of left and right guide shafts 78 in the lifting mechanism 71 described above are connected to the shaft center P ₄ of the spindle motor 72 and the cartridge center P.
_The spindle motor elevating plate 75 is rotated horizontally in the directions of arrows h and h ′ about the pair of left and right guide shafts 78, so that the spindle motor elevating plate 75 is rotated in a direction perpendicular to both of the spindle motors 1. 72 for the guide shaft 7
The inclination is adjusted in the directions of the arrows h and h ′ along the cartridge center P ₁ with 8 as the center of rotation.

Then, along the direction of the arrows b, b'on the lower surfaces of the high places 98a of the pair of left and right second slide cams 98 for vertically moving the pair of left and right guide shafts 80 fixed to the bottom surface of the slide plate 40. Angle θ _{1 with} respect to the horizontal reference plane WL
The skew adjusting cam surface 122 is formed so as to be inclined. A pair of left and right guide shafts 80 that are crimped to the skew adjusting cam surface 122 from the direction of arrow i by a pair of left and right tension coil springs 92 that are crimping means are configured as cam followers for skew adjusting.

However, a pair of left and right, four guide shafts 7 in total
The lower surfaces of the high parts 96a and 97a of the four first slide cams 96 and 97, which are a pair of left and right for driving the elevators 8 and 79 up and down, are formed in a completely horizontal plane.

The skew operation by the skew adjusting mechanism 121 is shown in FIGS. 25, 28, 20 and 31.
As shown in FIG. 2, the disc cartridge 2 is loaded on the cartridge mounting base 21 of the optical disc device 10 and positioned by the pair of left and right positioning pins 77, and the optical disc 1 is horizontally magnetically chucked on the disc table 73. The optical disc 1
Is performed in a reproduction mode in which the objective lens 103 of the optical pickup 101 and the skew sensor 104 are set horizontally.

Then, in this reproduction mode, the optical disk 1 is rotated by the spindle motor 72, and the tilt of the optical disk 1 with respect to the objective lens 103 is detected by the light reflection type skew sensor 104.

The skew adjusting mechanism 121 is shown in FIG.
As shown in, the tilt of the optical disc 1 with respect to the objective lens 103 is adjusted so that the optical axis F of the laser beam emitted from the objective lens 103 to the optical disc 1 is perpendicular (90 °) to the optical disc 1. It is a thing.

That is, as shown in (A) and (B) of FIG.
Based on the detection output from the skew sensor 104, the slide plate 40 is driven by the loading motor 37 described above.
Is slid with respect to the reference position P _{11 in the} directions of arrows b and b ′ with a very small slide stroke S ₁ .

Then, as shown in FIG. 4 (A), the high parts 96a, 9 of the four first slide cams 96, 97 in total.
Since the lower surface of 7a is formed in a completely horizontal plane,
While a total of four guide shafts 78 and 79 do not move up and down in the directions of arrows i and i ′, a pair of left and right second guide shafts 78 and 79 do not occur.
Vertical movement within the lift stroke S ₂ of the arrows i, i 'direction of trace amount to the left and right pair of guide shafts 80 by the skew adjustment cam surface 122 formed on the lower surface of the high place portion 98a of the slide cam 98 Occurs.

As shown in FIGS. 2 and 3, the spindle motor elevating plate 75 moves the pair of left and right guide shafts 80 by the elevating operation of the pair of left and right guide shafts 80 in the elevating stroke S _{2 in} the directions of arrows i and i '. Arrow i around 78,
The rotation is adjusted in the i'direction.

Then, as shown in FIGS. 1 to 3, the spindle motor 72 is tilt-adjusted in the directions of the arrows h and h ′ about the pair of left and right guide shafts 78 as the center of rotation, and the spindle motor 72 is horizontally magnetized on the disk table 73. The chucked optical disc 1 is inside the disc cartridge 2,
The tilt is adjusted within the range of the tilt angles θ ₁₁ and θ ₁₂ of about 5 ° at the maximum in the directions of the arrows j and j ′ which are the vertical directions with respect to the horizontal reference P ₁₂ .

By adjusting the inclination of the optical disk 1, radial skew adjustment is performed so that the optical disk 1 is perpendicular (90 °) to the optical axis F of the laser beam of the objective lens 103.

That is, this radial skew adjustment operation is based on the detection output from the skew sensor 104.
When the optical disk 1 is tilted with respect to the objective lens 103 in the arrow j direction which is the (+) direction with respect to the horizontal reference P ₁₂ as shown by the dashed line in FIG. 1, the tilt of the optical disk 1 Is radially adjusted so as to be corrected toward the horizontal reference P ₁₂ side in the arrow j ′ direction which is the (−) direction. Also,
When the optical disc 1 is tilted with respect to the objective lens 103 in the arrow j ′ direction which is the (−) direction with respect to the horizontal reference P ₁₂ as shown by the chain double-dashed line in FIG. Radial adjustment is performed to correct the inclination in the direction of arrow j, which is the (+) direction, toward the horizontal reference P ₁₂ side.

As a result, the optical disc 1 is always perpendicular to the optical axis F of the laser beam of the objective lens 103 (90
In this state, the data is reproduced in the state of being kept at (°), and the data can be reproduced with high density and high accuracy.

According to the skew adjusting mechanism 121, the radial skew adjustment of the optical disk 1 in the directions of the arrows j and j'is performed by adjusting the inclination of the spindle motor 72 in the directions of the arrows b and b '.
Since the structure is simple and the driving force is small as compared with the one in which the entire tilt is adjusted, it is possible to obtain a compact, low-cost, and power-saving type optical disk device 10.

Moreover, in this optical disk device 10, since the single loading motor 37 also serves as the drive source for the cartridge loading mechanism 31, the elevating mechanism 71 and the skew adjusting mechanism 121, the number of motors can be greatly reduced, Optical disk device 1
It is possible to increase the effective area inside the optical disc 0 and to reduce the size of the optical disc device 10.

The optical disk device 10 is of a cartridge type and is characterized in that the radial skew adjusting operation of the optical disk 1 can be performed inside the disk cartridge 2.

In this optical disk device 10, a pair of left and right second slide cams 98 for adjusting the inclination of the spindle motor 72 in the directions of the arrows h and h'are provided to the left and right for driving the spindle motor 72 and the positioning pin 77 up and down. Since the pair of four first slide cams 96 and 97 are arranged in the middle, the spindle motor 72 and the positioning pin 7 are arranged.
7 can be smoothly performed and the angle adjustment operation of the spindle motor 72 can be smoothly performed.

[Consideration on Tilt of Positioning Pin during Skew Adjustment] As shown in FIGS. 9 and 10, the guide shafts 78 and 79 are moved by the slide adjustment of the second slide cam 98 in the directions of the arrows b and b ′. The guide shaft 80 arranged in the middle is adjusted up and down in the directions of arrows i and i ', and the spindle motor elevating plate 75 is rotated and adjusted around the guide shaft 78 in the directions of arrows i and i'to adjust the radial skew described above. When the intermediate guide shaft 80 is moved up and down, the positioning pin elevating plate 76 is also moved around the guide shaft 79 by the arrows i, i ′.
Is rotated in the direction, and the positioning pin 77 and the guide pin 7
A tilt in the directions of the arrows k and k ′ around 9 is generated.

9 (A) and 10 (A), the guide shaft 80 is lowered in the direction of the arrow i'to move the axis P ₄ of the spindle motor 72 by (+) θ _{2 in the} direction of the arrow h. Arrow k of shaft center P ₅ of positioning pin 77 when rotated
The inclination of (−) θ _{3 in} the direction is shown. In each of FIGS. 9 (B) and 10 (B), the axis P ₄ of the spindle motor 72 is rotated by (−) θ ₂ in the arrow h ′ direction by the upward movement of the guide shaft 80 in the arrow i direction. The (+) θ ₃ inclination of the axis P ₅ of the positioning pin 77 in the direction of the arrow k ′ is shown.

At this time, as shown in FIG. 10, the guide shaft 8
When 0 is arranged at a position P ₆ closer to the guide shaft 79 side than the intermediate position P ₇ between the guide shafts 78 and 79 on both sides, the inclination (−) of the axis P ₅ of the positioning pin 77 in the directions of the arrows k and k ′ (−).
θ ₃ and (+) θ ₃ are the axis P of the spindle motor 72.
Inclination (+) θ ₂ and (−) θ _{2 in the} directions of arrows h and h ′ of ₄
As a result, the position of the positioning pin 77 engaged in the positioning hole 6 of the disc cartridge 2 is greatly displaced in the directions of the arrows b and b ′ as described above.

When a large displacement of the positioning pin 77 in the positioning hole 6 in the directions of the arrows b and b'occurs, the disk cartridge 2 moves in the arrow direction with respect to the optical disk 1 mounted on the disk table 73. b, b '
There is a risk that the disc cartridge 2 may be displaced in the direction and interfere with the optical disc 1.

However, as shown in FIG. 9, the guide shaft 80
Is arranged at a position P ₆ closer to the guide shaft 78 side than the intermediate position P ₇ between the guide shafts 78 and 79 on both sides, the inclination (−) θ of the axis P ₅ of the positioning pin 77 in the directions of the arrows k and k ′.
₃ and (+) θ ₃ are the axis P _{4 of the} spindle motor 72.
Is smaller than the inclinations (+) θ ₂ and (−) θ _{2 in the} directions h, h ′ of the positioning pin 77 in the positioning hole 6 of the disc cartridge 2 in the directions b, b ′. The size can be reduced, and the interference between the disc cartridge 2 and the optical disc 1 can be avoided.

Therefore, as shown in FIG. 9, the guide shaft 80
Is preferably arranged at a position P ₆ closer to the guide shaft 78 side than the intermediate position P ₇ between the guide shafts 78 and 79 on both sides. That is, the distance between the guide shafts 78 and 79 on both sides is set to L ₁
, The distance L ₂ between the guide shafts 80 and 78 is L ₁ /
It is preferably set to 2 or less.

[Explanation of Positioning Pin Position Shift Prevention Structure] FIG. 11 shows a structure for preventing the position shift of the positioning pin 77 in the positioning hole 6 of the disc cartridge 2 by moving the positioning pin up and down. Both end portions 76a of the plate 76 on the arrow b direction side are rotatably installed not on the intermediate guide shaft 80 but on a pair of left and right guide shafts 78 that constitute a rotation fulcrum of the spindle motor 72.

According to this structure, the spindle motor elevating plate 75 is moved around the guide shaft 78 by the arrow i, i by adjusting the intermediate guide shaft 80 in the direction of the arrows i, i '.
When the above-described radial skew adjustment is performed by adjusting the rotation in the i'direction, the positioning pin elevating plate 76 can always maintain a horizontal state.

Therefore, when the radial skew is adjusted, the positioning pins 77 are prevented from being displaced in the positioning holes 6 in the directions of the arrows b and b ', and the positioning of the disc cartridge 2 by the positioning pins 77 can be performed with high accuracy. And, it can be done stably.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments shown in the drawings, and various modifications can be made based on the technical idea of the present invention. .

For example, the present invention may be one in which a bare optical disk is loaded and ejected onto the cartridge mounting table by a disk tray or the like.

Further, the present invention is applicable to various optical disk devices for recording and / or reproducing so-called optical disks such as optical disks such as CDs and CD-ROMs and magneto-optical disks such as MOs.

[0109]

The optical disk device of the present invention configured as described above has the following effects.

According to a first aspect of the present invention, there is provided an erroneous insertion preventing means for preventing erroneous insertion of a regular disk cartridge (for example, erroneous insertion in the front-reverse direction) on the cartridge mounting table, and a disk operated by the erroneous insertion preventing means. The type discriminating switch is provided, and the disc type discriminating switch is operated by the erroneous insertion preventing means to operate the loading mechanism only when the proper disc cartridge is properly inserted into the cartridge mounting table. It is possible to prevent erroneous insertion of a legitimate disc cartridge on the mounting table and prevent loading of a similar disc cartridge, thereby ensuring high safety.

According to a second aspect of the present invention, the base portion on the insertion direction side of the disk cartridge to the cartridge mounting table is rotatably attached to the cartridge mounting table, and the tip on the ejection direction side of the disk cartridge from the cartridge mounting table is the same. An erroneous insertion prevention lever configured to be able to move in and out of the cartridge mounting base, a biasing means for rotationally urging the tip of the erroneous insertion prevention lever toward the inside of the cartridge mounting base, and a tip of the erroneous insertion prevention lever. A stopper that regulates the rotation angle of the cartridge mounting base to the inside constitutes an erroneous insertion prevention means, and the disc type determination switch is operated by rotating the erroneous insertion prevention lever to the outside of the cartridge mounting base Therefore, it is possible to prevent incorrect insertion of a legitimate disk cartridge on the cartridge mounting table, and A simple structure and prevent the loading of the I disk cartridge reliably performed.

According to the third aspect of the invention, the loading mechanism is operated by AND output of the disc insertion detection switch for detecting the insertion of the disc cartridge on the cartridge mounting table and the disc type discrimination switch. The cartridge loading prevention operation can always be reliably performed, and higher safety can be ensured.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view illustrating an outline of a skew adjusting mechanism in an embodiment of an optical disc device to which the present invention is applied.

FIG. 2 is a partially cutaway side view illustrating an outline of a slide cam mechanism of a drive unit in the above skew mechanism.

FIG. 3 is a partially cutaway side view for explaining the operation of the slide cam mechanism in the above skew adjusting mechanism.

FIG. 4 is an enlarged side view of a main part of the above slide cam mechanism.

FIG. 5 is a partially cutaway side view illustrating an outline of a spindle motor and a positioning pin elevating mechanism in the embodiment of the optical disc device.

FIG. 6 is a partially cutaway side view illustrating a vertical guide in the spindle motor and the positioning pin lifting mechanism of the above.

FIG. 7 is a perspective view illustrating a slide plate, a spindle motor lifting plate, and a positioning pin lifting plate of the above.

FIG. 8 is a perspective view illustrating a skew adjusting mechanism, a spindle motor, and a positioning pin lifting mechanism of the above.

FIG. 9 is a side view for explaining the inclination of the positioning pin of the disk cartridge in the spindle motor and the positioning pin lifting mechanism of the above.

FIG. 10 is a side view similar to FIG.

FIG. 11 is a perspective view illustrating a structure for raising and lowering the above positioning pin in parallel.

FIG. 12 is a perspective view illustrating a disc erroneous insertion prevention unit and a disc type determination switch in the embodiment of the optical disc device.

13 is a partially cutaway plan view of FIG. 12. FIG.

FIG. 14 is a partially cutaway plan view for explaining the disc erroneous insertion prevention operation of FIG. 13;

FIG. 15 is a diagram showing a control circuit and a flow chart thereof for controlling disc misinsertion and disc type discrimination in FIGS. 12 to 14;

FIG. 16 is a perspective view showing the disc cartridge and the entire optical disc device.

FIG. 17 is a perspective view showing a disc cartridge and a cartridge mounting base.

FIG. 18 is a perspective view showing a cartridge mounting table, a slide plate, a spindle motor, and an optical pickup.

FIG. 19 is a perspective view showing a loading mechanism, an optical pickup, a skew adjusting mechanism, a spindle motor, and a positioning pin lifting mechanism.

FIG. 20 is a plan view of a cartridge mounting base.

FIG. 21 is a bottom view of the cartridge mounting base.

FIG. 22 is a side view of the cartridge mounting base showing the lowered state of the spindle motor.

FIG. 23 is a side view of the cartridge mounting base showing the raised state of the spindle motor.

FIG. 24 is a partially cutaway side view of the entire optical disc device showing a disc eject state.

FIG. 25 is a partially cutaway side view of the entire optical disc device showing a disc loading state.

FIG. 26 is a sectional view taken along the line AA in FIG. 20, showing the suspension structure of the cartridge mounting base with respect to the chassis.

FIG. 27 is a sectional view taken along the line BB in FIG. 20, showing the lowered state of the positioning pin with respect to the cartridge mounting table.

FIG. 28 is a cross-sectional view taken along the line BB in FIG. 20, showing a state where the positioning pin is raised with respect to the cartridge mounting base.

FIG. 29 is a sectional view taken along the line C-C in FIG. 20, showing the lowered state of the spindle motor with respect to the cartridge mounting table.

FIG. 30 is a sectional view taken along the line D-D in FIG. 20, showing a state in which the spindle motor is raised with respect to the cartridge mounting table.

FIG. 31 is a sectional view taken along the line EE in FIG. 20 for explaining the arrangement of the objective lens of the optical pickup with respect to the cartridge mounting table.

[Explanation of symbols]

 1 Optical Disc 2 Disc Cartridge 8 Tapered Surface of Disc Cartridge 10 Optical Disc Device 21 Cartridge Mounting Base 31 Loading Mechanism 32 Slider 34 Cartridge Locking Lever 37 Loading Motor 53 Disc Insertion Detection Switch 61 Incorrect Insertion Prevention Lever (Incorrect Insertion Prevention Means) 63 Support Point Pin 64 Torsion coil spring (rotation biasing means) 65 Stopper 66 Disc type discriminating switch 67 AND circuit

Claims (3)

[Claims] 1. A disc cartridge containing an optical disc for recording and / or reproducing, a cartridge mounting base into which the disc cartridge is inserted, and the disc cartridge inserted onto the cartridge mounting base to a loading position. A loading mechanism that automatically pulls in, an erroneous insertion prevention unit that prevents erroneous insertion of a legitimate disc cartridge on the cartridge mounting table, and the above-mentioned method only when the legitimate disc cartridge is properly inserted on the cartridge mounting table. An optical disc apparatus comprising: a disc type determination switch which is operated by an erroneous insertion preventing means to activate the loading mechanism. 2. A base portion on the insertion direction side of the disk cartridge to the cartridge mounting table is rotatably mounted on the cartridge mounting table, and a tip of the disk cartridge from the cartridge mounting table on the ejection direction side is formed. An erroneous insertion prevention lever configured to move in and out of the cartridge mounting base, a biasing means for urging the tip of the erroneous insertion prevention lever to the inside of the cartridge mounting base, and a tip of the erroneous insertion prevention lever. The erroneous insertion preventing means is constituted by a stopper that regulates the rotation angle of the cartridge mounting table to the inside, and the disc type determination switch is operated by rotating the erroneous insertion preventing lever to the outside of the cartridge mounting table. The optical disk device according to claim 1, wherein the optical disk device is configured to operate. 3. The loading mechanism is operated by AND output of a disk insertion detection switch for detecting insertion of the disk cartridge onto the cartridge mounting table and an AND output of the disk type determination switch. The optical disk device according to claim 1 or 2.