JPH10116458A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the whole of an optical disk device thin. SOLUTION: This device is provided with a disk tray mounting an optical disk 1 and loading/ejecting the disk, a disk table 40 moving in the direction almost orthogonal to the surface of the disk 1 (orthogonal direction of disk surface), engaging a centering guide 40a with the central hole 1a of the optical disk 1 and separating the optical disk 1 mounted on the disk tray from the disk tray and a disk clamper 53 supported on the opposite side of the disk table 40 by a clamper supporting member 52 while interposing the optical disk 1, separated from the clamper supporting member 52 by magnetically attracted to the disk table 40 on which the centering guide 40a is engaged with the central hole of the optical disk 1 and chucking the optical disk 1 between the clamper and the disk table 40. In this case, this device is provided with an energizing means for energizing the disk clamper 53 in the direction opposite to the side (reverse table direction) on which the disk table 40 is located in the orthogonal direction to the disk surface farther from the chucking position of the optical disk 1 at the time of loading and ejecting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an optical disk device. More specifically, the present invention relates to a technical field of an optical disk device in which an optical disk is loaded by a disk tray, and the loaded optical disk is chucked between a disk table and a clamper.

[0002]

2. Description of the Related Art Here, an optical disk apparatus of this type, which has been filed by the applicant of the present invention, will be described with reference to FIGS. That is, as shown in FIG. 15, after the optical disk 1 is placed horizontally in the recess 3 formed on the upper surface of the disk tray 2, the front panel 2a of the disk tray 2 is placed.
When lightly pressed in the direction of arrow a, a loading switch (not shown) is turned ON, and the loading mechanism described later moves the disc tray 2 from the tray entrance 4 into the optical disc apparatus 5 as shown in FIG. The optical disk 1 is drawn horizontally in the direction of arrow a, and is automatically loaded horizontally on a disk table connected to a motor shaft of a spindle motor as described later.

After the loading, the optical disc 1 is rotated at a high speed by a spindle motor based on a reproduction command signal from the host computer, etc.
Recording or reproduction on the optical disk 1 is performed by the optical pickup. After the reproduction of the optical disk 1 or the like, the disk tray 2 is moved out of the optical disk device 5 from the tray entrance 4 in the direction of the arrow a ', which is the ejection direction, as shown in FIG. Ejected automatically.

As shown in FIGS. 9 to 14, a disc tray 2 made of a synthetic resin or the like has
From the center to the rear end 2b of the tray center P1
A long hole-shaped bottom opening 8 is formed along (see FIG. 10). A pair of left and right guide rails 9, 9 parallel to the tray center P1 are integrally formed on both left and right side edges of the disc tray 2. On one side of the bottom surface of the disk tray 2, a substantially J-shaped, parallel rack 10 and guide grooves 11 are integrally formed. still,
These racks 10 and linear portions 10a of the guide grooves 11
11a is formed in parallel with the tray center P1,
Arc portions 10b and 11b are formed at the end on the front panel 2a side.

A substantially box-shaped shallow chassis 14 made of a synthetic resin or the like is provided inside the optical disk device 5. A pair of left and right guide rails 9 of the disk tray 2 are provided on both right and left side plates of the chassis 14. 14a, 14a
A plurality of tray guides 15 integrally formed inside the
Arrows a shown in FIG.
It is configured to be slid in the a 'direction. An elevating frame 16 made of a synthetic resin or the like is mounted on a bottom portion 14b of the chassis 14. The elevating frame 16 is integrally formed with insulator mounting portions 17, 17, and 18 at a total of three locations, that is, two locations on the left and right sides on the rear end portion 16a side and a central portion on the front end portion 16b side. Insulator mounting parts 17, 1
Three insulators 19, 19, and 20, which are shock absorbers made of an elastic member such as rubber, are attached to 7, 7 (see FIG. 9).

The rear end 16a of the lifting frame 16
Pair of left and right insulators 19, 19 attached to the
Are mounted on the bottom 14b of the chassis 14 by set screws 21 and 21 inserted in the center thereof, and one insulator 20 attached to the front end 16b of the elevating frame 16 has a set screw 22 inserted in the center thereof. And is mounted on the tip of the lifting drive lever 23. The lifting drive lever 23 is connected to the tray center P1.
13 and 14 in which the base of the lifting drive lever 23 is vertically positioned on the bottom 14b of the chassis 14 by a pair of left and right horizontal fulcrum pins 24, 24. Are rotatably supported so as to move in the directions of arrows b and b '.

[0007] Accordingly, the lifting frame 16 is moved by the vertical drive lever 23 to move the vertical frame 16 about the pair of left and right insulators 19, 19 on the rear end 16a side thereof as a rotation fulcrum. , C ′. A shallow recess 25 is formed on the upper surface of the lifting frame 16 (see FIG. 11).

The loading mechanism 27 is mounted on one side of the front end 16b of the lifting frame 16 on the bottom 14b of the chassis 14 (see FIGS. 9 and 12).
The loading mechanism 27 includes a loading motor 28, a pinion 29 driven by the loading motor 28 in the forward and reverse rotation, and a center axis 29 a of the pinion 29 around a vertical fulcrum axis 30 in the horizontal plane with arrows d and d. 'Pinion lever 31 that swings in the' direction
And a pair of partial gears 3 by the pinion lever 31.
A cam lever 34 driven through the shafts 2 and 32 and rotated in a horizontal plane in directions indicated by arrows e and e 'around a vertical fulcrum shaft 33, and formed in an arc around the fulcrum shaft 33 of the cam lever 34. And a cam groove 3 having a step in the vertical direction.
5 (see FIGS. 9, 13 and 14) and a cam follower pin 36 (FIGS. 9 and 13) integrally formed on one side of the tip of the lifting drive lever 23 and loosely fitted into the cam groove 35. And FIG.
4). Then, the pinion 29 is engaged with the rack 10 of the disk tray 2, and the center shaft 29 a of the pinion 29 is loosely fitted in the guide groove 11.

The loading mechanism 27 moves the center axis 29a of the pinion 29 almost
The pinion 2 is guided by the guide groove 11 having the shape of
9 is arranged along a substantially J-shaped rack 10 of the disk tray 2. That is, when loading the disk tray 2, the linear portion 10 a of the rack 10 is moved from the rear end 2 b side of the disk tray 2 to the front panel 2 a by the pinion 29 driven forward by the loading motor 28.
By driving linearly toward the side, the optical disk 1 placed on the disk tray 2 is drawn horizontally into the optical disk device 5 in the direction of arrow a. Then, the pinion 29 is swung in the direction of arrow d along the arcuate portion 10b of the rack 10 by the continuous forward rotation of the pinion 29 by the loading motor 28. At this time, a pair of partial gears are moved by the pinion lever 31. 3
The cam lever 34 is driven to rotate in the direction of the arrow e via 2 and 32.

Then, the cam follower pin 36 of the elevation drive lever 23 is driven upward by the cam groove 35 of the cam lever 34 in the direction of the arrow b, and the elevation frame 16 is moved by the elevation drive lever 23 through the insulator 20. The ascending drive is driven in the direction of arrow c around the pair of left and right insulators 19 from a lowering position, which is inclined obliquely downward, as shown in FIG. When the optical disk 1 placed on the disk tray 2 is ejected, the pinion 29 driven in reverse rotation by the loading motor 28 is moved in the direction of arrow d 'along the arcuate portion 10b of the rack 10 by the reverse operation of loading. During the swing motion, the cam lever 34 is moved to the arrow e '.
, The cam follower pin 36 is driven downward by the cam groove 35 in the direction of the arrow b ′ below, and the lifting drive lever 23 is moved through the insulator 20 via the insulator 20.
FIG. 14 around the pair of left and right insulators 19 and 19.
Arrow from the raised position shown in FIG. 13 to the lowered position shown in FIG.
Drive down in the direction. Then, the loading motor 28
By the subsequent reverse rotation drive of the pinion 29 by
The linear portion 10a of the rack 10 is linearly driven from the front panel 2a side to the rear end portion 2b side of the disk tray 2 by the pinion 29, and the disk tray 2 is moved out of the optical disk device 5 in the direction of arrow a '. Extrude.

A spindle motor 39 is vertically mounted in the recess 25 of the lifting frame 16 at a position closer to the front end 16b, and the upper end of the motor shaft 39a is formed of a magnetic material such as metal. The disk table 40 is fixed horizontally. A centering guide 40a into which the center hole 1a of the optical disk 1 is fitted is integrally formed at the upper center of the disk table 40. Further, an optical pickup 41 is horizontally mounted in the recess 25 of the lifting frame 16 behind the spindle motor 39. And this optical pickup 41
Denotes an objective lens 42 and a light reflection type skew sensor 4
3 has a carriage 44 which is mounted vertically upward and vertically, and an optical block 45 for transmitting a laser beam to the objective lens 42 is integrally mounted on a side surface of the carriage 44 (see FIG. 11). .

The lifting frame 16 has a carriage moving mechanism 47 for linearly moving the carriage 44 in the directions of arrows a and a 'along a pair of left and right guide shafts 46,46.
(See FIGS. 9 and 11). The carriage moving mechanism 47 is attached to one side of a pinion 50 driven forward and reverse by a carriage drive motor 48 via a gear train 49, and one side of the carriage 44. And a rack 51 linearly driven by a pinion 50. The spindle motor 39 and the objective lens 42 are disposed on the tray center P1, and the objective lens 42 is moved along the tray center P1 by arrows a,
It is configured to be moved in the a 'direction.

The right and left side plates 14a, 14a of the chassis 14 are moved across the upper portion of the disk tray 2.
A clamper support plate 52, which is a clamper support member, is horizontally erected between upper ends of the disk table 40.
The disc clamper 53 is supported in a circular hole 54 formed at the center position of the clamper support plate 52 at a position directly above the disc clamper 53 so as to be movable up and down, right and left, and back and forth within a certain range (FIGS. 10 and 13). And FIG. 14). A clamper receiver 52a for receiving a flange 53a integrally formed on the outer periphery of the upper end of the disk clamper 53 from below is integrally formed on the outer periphery of the circular hole 54 of the clamper support plate 52. A disk-shaped magnet 55 is horizontally embedded in the center of the disk clamper 53.
An upper cover 26 made of sheet metal or the like is attached to an upper portion of the chassis 14 so as to straddle an upper portion of the clamper support plate 52.

Therefore, as shown in FIG. 14, after the optical disk 1 is loaded horizontally into the optical disk apparatus 5 by the disk tray 2 from the direction of arrow a, the lifting frame 16 is raised to the ascending position in the direction of arrow c and horizontally moved. Is reached, the disk table 40 is inserted upward from the bottom opening 8 of the disk tray 2, and the centering guide 40a of the disk table 40 is fitted into the center hole 1a of the optical disk 1 from below. Then, the optical disk 1 is moved to the disk tray 2 by the disk table 40.
The optical disk 1 is lifted upward in the recess 3 of the
Magnetically chucked on top.

The optical disk 1 is rotated at a high speed by a spindle motor 39 based on a reproduction command signal or the like from a host computer, and the carriage 44 of the optical pickup 41 is moved by the carriage moving mechanism 47 in the directions of arrows a and a '. Is moved to the objective lens 4
2 is moved in the directions of arrows a and a 'along the tray center P1. Then, the laser beam transmitted from the optical block 45 is applied to the lower surface of the optical disc 1 by the objective lens 42, and the reflected light is applied to the objective lens 42.
Received by the optical block 45 through the optical disk 1
Is recorded or reproduced.

The carriage moving mechanism 47 drives the rack 44 linearly by a pinion 50 driven forward and reverse by a carriage drive motor 48 via a gear train 49, thereby moving the carriage 44 to a pair of left and right guide shafts 46. It moves along arrows 46 in the directions of arrows a and a '. Then, after recording or reproduction on the optical disk 1, based on an ejection command signal from the host computer, the elevating frame 16 is lowered in the direction of arrow c 'as shown in FIG. The optical disk 1 is placed horizontally in the recess 3 of the disk tray 2 and ejected horizontally out of the optical disk device 5 in the direction of arrow a '.

[0017]

By the way, in the prior application of the optical disk apparatus 5, as shown in FIG. 13, the disk clamper 5 is used at the time of loading and ejecting.
3 is lowered by its own weight, and the flange 53 on its outer periphery is lowered.
a is suspended by being brought into contact with the clamper receiver 52a of the clamper support plate 52. And in the suspended state,
A clearance L1 is secured between the lower surface of the disc clamper 53 and the optical disc 1 on the disc tray 2 to restrict the optical disc 1 from interfering with the disc clamper 53 when loading and ejecting the optical disc 1. Therefore, in the prior application example of the optical disk device 5, the disk clamper 53 is lowered from the clamper support plate 52 by the clearance L2 at the time of loading and ejection, and the clearance L1 is secured between the disk clamper 53 and the optical disk 1. Therefore, there is a large space of L1 + L2 between the clamper support plate 52 and the upper surface of the optical disk 1, and there is a problem that the thickness of the entire optical disk device 5 is increased.

Therefore, an object of the present invention is to overcome the above-mentioned problems and to reduce the thickness of the entire optical disk device.

[0019]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an optical disk apparatus according to the present invention is provided with a means for urging a disk clamper to a position higher than a chucking position of an optical disk during loading and ejecting of the optical disk. It is equipped with force means.

According to another optical disc apparatus of the present invention, in order to solve the above-mentioned problem, at the time of loading and ejecting an optical disc, a disc table is located in a direction perpendicular to a disc surface relative to a chucking position of the optical disc. There is provided an urging means for urging in a direction opposite to the side (in a direction opposite to the table).

Therefore, according to the present invention, the clearance between the optical disk and the clamper supporting member to be secured when the optical disk is loaded or ejected can be reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the optical disk apparatus of the present invention will be described below with reference to FIGS. Parts having the same structures as those in FIGS. 9 to 16 are denoted by the same reference numerals, and redundant description will be omitted.

First, in the first embodiment shown in FIGS. 1 to 3, a disk-shaped magnet 55 horizontally buried in the center of a disc clamper 53 and a clamper support plate 52
A disc-shaped magnetic plate 57, which is a magnetic member horizontally attached to the upper center of the disk, constitutes an urging means for urging the disk clamper 53 upward. According to the first embodiment, at the time of loading and ejection shown in FIGS. 1 and 3A, the disk clamper 53 is actuated by the magnetic attraction acting between the magnet 55 and the magnetic plate 57. Is raised in the direction of arrow b to an upper position in contact with the lower surface of the magnetic plate 57 so that the lower surface of the disk clamper 53 is flush with the lower surface of the clamper support plate 52 or the lower surface of the clamper support plate 52. It is designed to be able to be raised to a position higher than the lower surface.

Therefore, at the time of loading and ejecting, a minimum clearance L4 is formed between the clamper support plate 52 and the optical disk 1 placed horizontally on the disk tray 2 so that they do not interfere with each other. The clearance L4 can be made sufficiently smaller than the clearance L1 + L2 of the prior application example shown in FIG. That is, L4 <(L1 + L2).

Next, at the time of chucking shown in FIGS. 2 and 3B, the centering guide 40a of the disk table 40 which is raised in the direction of arrow c fits into the center hole 1a of the optical disk 1 from below. The optical disk 1 is floated above the disk tray 2 by the disk table 40. At this time, the magnetic member serving as the centering guide 40a of the disk table 40 comes close to the magnet 55 of the disk clamper 53, and The distance from the centering guide 40a is smaller than the distance between the magnet 55 and the magnetic plate 57. As a result, the magnetic clamp force acting between the magnet 55 and the centering guide 40a causes the disk clamper 53 to be attracted downward in the direction of the arrow b ', and the disk clamper 53 is moved by the amount corresponding to the clearance L5 by the arrow b'.
The disc clamper 53 chucks the optical disc 1 on the disc table 40. At the time of this chucking, the optical disc 1 is raised in the direction of arrow b within the clearance L4, and the clearance between the clamper support plate 52 and the optical disc 1 becomes L3 smaller than L4.

As described above, according to the present invention, the loading and the ejection are performed based on the height of the chucking position of the optical disk 1 by the disk clamper 53 shown in FIGS. 2 and 3B. (A), the disc clamper 53 is urged upward in the direction of the arrow b to a position above the chucking position. As a result, the aforementioned L4 <(L1 +
The clearance condition of L2) can be satisfied, and L
4 and (L1 + L2).
It is possible to reduce the overall thickness. FIG.
When the disc table 40 is lowered in the direction of arrow c 'when the chucking state shown in FIG. 3B is shifted from the chucking state shown in FIG.
The disk clamper 53 is forcibly separated from the disk table 40 by a being brought into contact with the clamper receiver 52a.

Next, in a second embodiment shown in FIG. 4, a disk-shaped yoke 59 which is a magnetic member embedded in the center of a disk clamper 53, and is horizontally mounted on the upper center of a clamper support plate 52. A disk-shaped yoke 58 made of a magnetic member and a disk-shaped weak magnet 60 adhered to the center of the lower surface of the yoke 58 constitute an urging means for urging the disk clamper 53 upward. An annular strong magnet 61 is embedded in the centering guide 40a of the disk table 40.

According to the second embodiment,
As shown in FIG. 4A, the disc clamper 5 is weakened by a weak magnetic attraction acting between the weak magnet 60 and the yoke 59 during loading and ejection.
3 to an upper position where it is brought into contact with the lower surface of the yoke 58 by an arrow b.
It is designed to rise in the direction. And FIG.
As shown in FIG. 3B, at the time of chucking, the disk clamper 53 is attracted by the strong magnetic attraction force acting between the strong magnet 61 and the yoke 59 in the downward direction of arrow b ', and the disk clamper 53 is moved downward. Is for chucking the optical disc 1 on the disc table 40. The operation and effect of the second embodiment are the same as the operation and effect of the first embodiment described above.

Next, in a third embodiment shown in FIG. 5, a clamper supporting portion 62, which is a clamper supporting member having a cylindrical concave shape, is integrally formed on an upper cover 26 made of a magnetic member. A cylindrical central shaft portion 53c integrally formed at the center upper portion of 53 is penetrated upward from below into a circular hole 63 formed at the center of the clamper support portion, and is horizontally formed on the outer periphery of the upper end of the central shaft portion 53c. The attached stopper ring 64 is disposed above the clamper support 62. The weak magnet 65 annularly buried above the disk clamper 53 and the clamper support 62 forming a yoke constitute biasing means for biasing the disk clamper 53 upward to an upper position. A strong magnet 66 is annularly embedded in the lower central portion of the clamper 53.

According to the third embodiment,
At the time of loading and ejecting shown in FIG. 5A, the arrow b is moved to a position where the disk clamper 53 is brought into contact with the lower surface of the clamper support 62 by the weak magnetic attraction acting between the weak magnet 65 and the clamper support 62. It is designed to rise in the direction. An annular concave portion 68 is formed on the lower surface of the clamper support portion 62 at a position facing the magnet 65, so that the magnet 65 does not adhere to the clamper support portion 62.

At the time of chucking shown in FIG. 5B, the disk clamper 53 is attracted in the direction of arrow b 'by the strong magnetic attraction acting between the strong magnet 66 and the centering guide 40a of the disk table 40. The disk clamper 53 chucks the optical disk 1 on the disk table 40. The operation and effect of the third embodiment are the same as those of the first and second embodiments. The effect is equivalent. L4, L6, and L7 indicate clearances during chucking. When chucking is released, the disc table 40 is forcibly moved from the disc clamper 53 by bringing the stopper ring 63 into contact with the clamper support 62 from above. Is to be separated.

Next, in a fourth embodiment shown in FIG. 6, the upper cover 26 is formed of a magnetic member, and an annular gap 67a is provided above an annular magnet 67 embedded in the center of the disk clamper 53. During loading and ejecting, the disc clamper 53 is moved upward by an arrow b by one magnet 67.
While chucking, the disk clamper 53 is magnetically attracted in the direction of arrow b 'below, and the disk clamper 53 chucks the optical disk 1 on the disk table 40. The same operations and effects as those of the first to third embodiments can be exerted.

Next, in a fifth embodiment shown in FIG. 7, the disk clamper 53 is formed of a magnetic member, and the lower surface of a disk-like member 69 horizontally mounted on the upper center of the clamper support plate 52 is provided on the lower surface. The formation of the circuit 70 constitutes an urging means for urging the disk clamper 53 to the raised position. The magnetic circuit 70 is formed by a coil wound in a substantially annular shape. Also, the centering guide 40 of the disc table 40
A magnet 71 is embedded in a.

According to the fifth embodiment,
At the time of loading and ejection shown in FIG. 7A, a current is caused to flow through the coil of the magnetic circuit 70 in one direction or the other direction to generate a magnetic force, which acts between the coil and the disk clamper 53 formed by the magnetic member. The disk clamper 53 is moved by the magnetic circuit 70 by the magnetic attraction force.
The lower surface of the disk clamper 53 is flush with the lower surface of the clamper support plate 52 or higher than the lower surface of the clamper support plate 52 by raising the lower surface of the disk clamper 53 to the upper position in contact with the lower surface of the clamper support plate 52. It is something that can be raised.

At the time of chucking shown in FIG.
The current is prevented from flowing through the magnetic circuit 70 so that no magnetic force is generated by the magnetic circuit 70. Then, the disc clamper 53 descends by its own weight, and as shown in FIG. 7B, a magnetic force acting between the magnet 71 provided on the disc table 40 moved in the direction of arrow c and the disc clamper 53. The disk clamper 53 is sucked in the direction of arrow b 'by the suction force, and the disk clamper 53 holds the optical disk 1 on the disk table 40.
The one that chucks on top.

The supply and stop of the current to the coil of the magnetic circuit 70 are performed, for example, as follows.

As described above, the current supply during loading is performed by the front panel 2a of the disc tray 2.
Is lightly pressed in the direction of arrow a to turn on a loading switch (not shown).
It is performed simultaneously when it becomes N. At this time, the magnetic circuit 7
The disk clamper 53 is brought into contact with the lower surface of the magnetic circuit 70 by the magnetic force of 0, and the lower surface of the disk clamper 53 is raised to a level flush with the lower surface of the clamper support plate 52 or higher than the lower surface of the clamper support plate 52. .

The supply of current is stopped when the disk tray 2 is drawn horizontally into the optical disk device 5 from the tray entrance 4 and the disk tray 2 reaches its moving end. Whether the disk tray 2 has reached the moving end is determined by, for example, a sensor (not shown) provided on the chassis 14 detecting the position of the disk tray 2 in the direction of arrow a (see FIG. 13), and It is done based on. When the supply of current to the coil of the magnetic circuit 70 is stopped, the disc clamper 53 descends by its own weight, and the disc 71 moves between the magnet 71 and the disc clamper 53 provided on the disc table 40 from which the optical disc 1 has been moved in the direction of arrow c. It is chucked by magnetic attraction acting in between.

The supply of current at the time of ejection is performed simultaneously with the ejection command signal sent from the host computer. At this time, the magnetic circuit 70
As a result, the disk clamper 53 is brought into contact with the lower surface of the magnetic circuit 70 and the lower surface of the disk clamper 53 is raised to a level flush with the lower surface of the clamper support plate 52 or higher than the lower surface of the clamper support plate 52.

Next, in a sixth embodiment shown in FIG. 8, an annular magnet 72 is buried in a disk clamper 53, and a lower surface of a disk-shaped member 69 horizontally mounted on the upper center of the clamper support plate 52. By forming the magnetic circuit 70 in the above, an urging means for urging the disk clamper 53 to the raised position is constituted. And the magnet 7
Numeral 2 is magnetized in two poles in the vertical direction. For example, an upper pole is an N pole, a lower pole is an S pole, and an annular yoke 73 is buried on the upper surface of the magnet 72. The disk table 40 is formed of a magnetic member.

According to the sixth embodiment,
At the time of loading and ejecting shown in FIG. 8A, a current is applied to the coil of the magnetic circuit 70 in one direction to generate a magnetic force in a direction to attract the disk clamper 53, and the magnet provided on the disk clamper 53 is provided. The lower surface of the disk clamper 53 is moved upward by the magnetic attraction force acting between the lower surface of the disk clamper 53 and the upper surface of the magnetic circuit 70. The height can be raised to a level flush with the lower surface or higher than the lower surface of the clamper support plate 52.

At the time of chucking shown in FIG.
The current is prevented from flowing through the magnetic circuit 70 so that no magnetic force is generated by the magnetic circuit 70. Then, the disk clamper 53 descends by its own weight, and as shown in FIG. 8B, the disk table 40 and the disk clamper 5 formed by the magnetic member moved in the direction of arrow c.
The disk clamper 53 is attracted in the direction of the arrow b 'by magnetic attraction force acting between the disk clamper 3 and the magnet 72 provided on the disk 3, and the disk clamper 53 chucks the optical disk 1 on the disk table 40.

The supply and stop of the current to the coil of the magnetic circuit 70 are performed, for example, in the same manner as in the fifth embodiment.

In the sixth embodiment,
When the optical disk 1 is chucked, a current is applied to the coil of the magnetic circuit 70 in the opposite direction to the above, thereby urging the disk clamper 53 to move downward, thereby chucking the optical disk 1. It can be more reliable.

That is, when a current in the opposite direction is applied to the coil of the magnetic circuit 70, the direction in which the disk clamper 53 repels the magnetic circuit 70, that is, the downward moving force is urged due to the magnetizing direction of the magnet 72. Is done. When the downward moving force is applied to the disk clamper 53, the optical disk 1 is pressed against the disk table 40 from above by the disk clamper 53, whereby the chucking state of the optical disk 1 is further strengthened.

The case where it is necessary to supply a reverse current to the coil of the magnetic circuit 70 to secure a strong chucking state of the optical disk 1 is, for example, a case where a so-called focus loss occurs when the apparatus is driven. is there. Since the focus loss occurs due to the resonance of the optical disk 1 or the like, a reverse current is caused to flow through the coil of the magnetic circuit 70 to strongly press the optical disk 1 against the disk clamper 53, thereby suppressing the resonance of the optical disk 1 and providing a stable optical disk 1. Recording or reproduction of a signal can be performed.

The supply of the reverse current to the coil of the magnetic circuit 70 may be performed in accordance with the degree of resonance generated in the optical disk 1. For example, when the degree of resonance is large, the magnetic force is increased. What is necessary is just to make strong electric current flow.

The supply of the reverse current in this case is performed based on, for example, an error signal detected when a focus error occurs.

When one disk is used to move the disk clamper 53 up and down by providing a difference in the distance between the magnet and the upper and lower magnetic members, each member in the manufacturing process of the optical disk apparatus 5 is required. The dimensional control of the distance between them must be strict.

In the fifth and sixth embodiments, however, the optical disk 1 can be chucked only by stopping the supply of the current flowing through the coil of the magnetic circuit 70. Therefore, it is not necessary to strictly control such dimensions, and the manufacturing cost can be reduced accordingly.

In the fifth and sixth embodiments, the disk clamper 53 is held at the upper position by using the magnetic circuit 70. By changing the intensity of the flowing current as needed, the attraction force to the disk clamper 53 can be changed. For example, when the weight of the disk clamper 53 is large, a strong current is applied to the magnetic circuit 7 to secure the disk clamper 53 in the upper position.
What is necessary is just to make it flow to a 0 coil and to raise an adsorption force.

The fifth embodiment and the sixth embodiment described above
In the embodiment, the magnet using the magnet for either the disk clamper 53 or the disk table 40 is shown, but the present invention is not limited to this, and the magnet may be provided for both the disk clamper 53 and the disk table 40. . When magnets are provided on both the disk clamper 53 and the disk table 40 in this manner, the two magnets attract each other, so that the chucking becomes strong.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made based on the technical concept of the present invention. For example, during loading and ejecting, it is also possible to mechanically urge the disk clamper to the upward position.

Further, the first to sixth embodiments described above.
In the above embodiment, the case where the disk clamper 53 is moved up and down in any case has been described. However, the optical disk device 5 according to the present invention is of a so-called vertical type, that is, the recording surface of the optical disk 1 is vertical. The optical disc 1 may be used in a direction along the direction. In this case, the optical disc 1 is sandwiched and chucked from a direction perpendicular to the vertical direction.

When the optical disk device 5 is used in a vertical position, in the above-described fifth and sixth embodiments, even if the supply of current to the coil of the magnetic circuit 70 is stopped, A situation may occur in which the clamper 53 does not move to the disc table 40 side and the chucking of the optical disc 1 is not properly performed. In this case, the magnet 7 is used in the fifth and sixth embodiments.
It is possible to increase the reliability of the disk clamper 53 by forcibly moving the disk clamper 53 to the disk table 40 side by making the first and the 72 strong, or by applying a reverse current to the coil of the magnetic circuit 70 in the sixth embodiment. Chucking is done.

[0056]

As is apparent from the above description, the optical disk apparatus of the present invention comprises a disk tray on which an optical disk is loaded and loaded and ejected, and a disk tray which is raised from a lowered position to a raised position after loading the optical disk. A disk table fitted into the center hole of the optical disk from below, and floating the optical disk above the disk tray; and a clamper supporting member supporting the optical disk at a position above the optical disk. An optical disk device comprising: a disk clamper that is separated from the clamper support member by being magnetically attracted to the disk table fitted from below into the hole and chucks the optical disk on the disk table. ,
A biasing means is provided for biasing the disc clamper to a position above the chucking position of the optical disc at the time of loading and ejecting, so that the clamper support member and the optical disc to be secured at the time of loading and ejecting the optical disc are provided. The clearance between them can be reduced, and the entire optical disk device can be made significantly thinner.

According to the second aspect of the present invention, the urging means for urging the disk clamper upward to a position above the chucking position of the optical disk is constituted by the magnet and the magnetic member. Unlike this, the structure is simple, the manufacturing is easy, and the cost can be reduced.

According to the third aspect of the present invention, a strong magnet for strongly attracting the disk clamper to the disk table and a weak magnet for weakly attracting the disk clamper to the upper position are provided.
Unlike the mechanical method, the structure is simple, the manufacturing is easy, and the cost can be reduced.

According to the fourth aspect of the invention, the clamper support member is made of a magnetic member, and a magnet is attached to the disk clamper, between the magnet and the clamper support member, and between the magnet and the disk table. By controlling the gap between the centering guide and the disk clamper, the upward biasing force to the upper position of the disk clamper is weakened, and the downward biasing force to the disk table side is set to be strong. The structure is simple, the manufacturing is easy, and the cost can be reduced.

Further, another optical disk apparatus of the present invention has a disk tray on which an optical disk is mounted and loaded and ejected, and a centering guide which fits into a center hole of the optical disk, and the optical disk mounted on the disk tray. Can move in a direction substantially perpendicular to the surface direction of the optical disk (perpendicular to the disk surface). A disk table that separates the optical disk from the disk tray, and is supported on the opposite side of the disk table across the optical disk by a clamper support member, and is magnetically attracted to the disk table in which the centering guide is fitted into the center hole of the optical disk. When it is separated from the clamper support member An optical disk drive comprising a disk clamper for chucking an optical disk between the disk table and the disk table. Since the urging means for urging in the opposite direction (opposite to the table direction) is provided, the clearance between the optical disk and the clamper supporting member to be secured at the time of loading and ejecting the optical disk can be reduced. Significant reduction in thickness can be achieved.

In the invention described in claim 6, since the urging means is constituted by the magnet and the magnetic member,
Unlike a method in which a disk clamper is moved in a direction perpendicular to a disk surface by a mechanical method, the structure is simple, the manufacturing is easy, and the cost can be reduced.

According to the seventh aspect of the present invention, there is provided a strong magnet for magnetically attracting the disk clamper in a direction (table direction) where the disk table is located in a direction perpendicular to the disk surface, and the urging means holds the disk clamper. Since it has a weak magnet that weakly attracts magnetic force in the direction opposite to the table, unlike a mechanism that moves the disk clamper in the direction perpendicular to the disk surface by a mechanical method, the structure is simple, easy to manufacture, and low cost realized. it can.

According to the eighth aspect of the invention, the clamper supporting member is formed of a magnetic member, and a biasing means is formed by attaching a magnet to the disk clamper. By controlling the gap between the members and the gap between the magnet and the centering guide of the disk table, the urging force of the disk clamper in the direction opposite to the table is reduced, and the urging force of the disk clamper in the direction of the table is increased. Therefore, the disk clamper can be moved in the direction perpendicular to the disk surface as necessary by simply changing the gap distance. Unlike the mechanical method in which the disk clamper is moved in the direction perpendicular to the disk surface, the structure is simple. Easy to manufacture, low cost Reduction can be realized.

According to the ninth aspect of the present invention, since the urging means comprises a disk clamper formed of a magnetic member and a magnetic circuit provided on a side opposite to the table with respect to the disk clamper, a mechanical system is used. In contrast to the structure in which the disk clamper is moved in the direction perpendicular to the disk surface, the structure is simple, the manufacturing is easy, and the cost can be reduced.

Also, as in the case of employing a system in which the distance between the members, for example, the distance between the magnet and each of the magnetic members located on the opposite side of the magnet is provided with a difference to move the disk clamper, In the apparatus, it is not necessary to strictly control the size of the distance between the members, and the manufacturing cost can be reduced accordingly.

Further, since the disk clamper is attracted by applying a current to the magnetic circuit at the time of loading and ejecting, the attraction force to the disk clamper is changed by changing the intensity of the current flowing to the magnetic circuit as necessary. Can be changed, and suction of the disk clamper can be ensured.

According to the tenth aspect of the present invention, since the urging means comprises a magnet provided on the disk clamper and a magnetic circuit provided on the side opposite to the table with respect to the disk clamper, the disk is mechanically driven. Unlike the structure in which the clamper is moved in the direction perpendicular to the disk surface, the structure is simple, the manufacturing is easy, and the cost can be reduced.

Also, as in the case of employing a system in which the distance between the members, for example, the distance between the magnet and each of the magnetic members located on the opposite side of the magnet is provided to move the disk clamper, In the apparatus, it is not necessary to strictly control the size of the distance between the members, and the manufacturing cost can be reduced accordingly.

Furthermore, since the disk clamper is attracted by applying a current to the magnetic circuit at the time of loading and ejecting, the attraction force to the disk clamper is changed by changing the intensity of the current supplied to the magnetic circuit as necessary. Can be changed, and suction of the disk clamper can be ensured.

In addition, when the optical disk is chucked, a current is applied to the magnetic circuit in a direction opposite to the direction in which the disk clamper is attracted, so that the disk clamper can be biased to move in the direction of the table. Therefore, the chucking of the optical disk can be strengthened as required.

It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the embodiment of the present invention.
These should not be construed as limiting the technical scope of the present invention.

[Brief description of the drawings]

FIG. 1 shows each embodiment of the optical disc apparatus of the present invention together with FIG. 2 to FIG. 8, and is a cross-sectional side view at the time of loading and at the time of ejecting which explains the first embodiment.

FIG. 2 is a cross-sectional side view of the first embodiment during chucking.

FIG. 3 is a sectional side view for explaining a main part of FIGS. 1 and 2;

FIG. 4 is a cross-sectional side view illustrating a main part of a second embodiment of the optical disk device of the present invention.

FIG. 5 is a cross-sectional side view illustrating a main part of a third embodiment of the optical disk device of the present invention.

FIG. 6 is a cross-sectional side view of a main part for describing a fourth embodiment of the optical disc device of the present invention.

FIG. 7 is a cross-sectional side view illustrating a main part of a fifth embodiment of the optical disk device of the present invention.

FIG. 8 is a cross-sectional side view of a main part explaining a sixth embodiment of the optical disc apparatus of the present invention.

9 shows an optical disk device of the prior application together with FIG. 10 to FIG. 16, and FIG. 9 is a partially cutaway plan view of the optical disk device.

FIG. 10 is an exploded perspective view illustrating a disk clamper, a clamper support plate, a disk tray, and a disk table.

FIG. 11 is an exploded perspective view illustrating a carriage moving mechanism and an elevating frame of the optical disc device.

FIG. 12 is an exploded perspective view illustrating a loading mechanism and a chassis of the optical disc device.

FIG. 13 is a cross-sectional side view of the optical disk device during loading or ejecting.

FIG. 14 is a cross-sectional side view of the optical disk device at the time of chucking.

FIG. 15 is a cross-sectional side view of the optical disk device during chucking, showing a state where the disk tray is pulled out.

FIG. 16 is a cross-sectional side view of the optical disk device during chucking showing a state where the disk tray is pulled in.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk, 1a ... Center hole, 2 ... Disk tray,
5 ... optical disk device, 40 ... disk table, 40a
... Centering guide, 52 ... Clamper support plate (clamper support member), 53 ... Disk clamper, 55
... magnet, 60 ... weak magnet, 61 ... strong magnet, 62 ... clamper support (clamper support member), 65 ... weak magnet, 66 ... strong magnet,
67: magnet, 67a: gap, 70: magnetic circuit, 71: magnet, 72: magnet

Claims (10)

[Claims] A disc tray on which an optical disc is placed and loaded and ejected; and a disc tray which is lifted from a lowered position to a raised position after loading of the optical disc, fitted into a center hole of the optical disc from below, and A disk table that floats the optical disk above the disk tray; and a magnetic table that is supported by a clamper support member at a position above the optical disk and that is magnetically attracted to the disk table fitted into the center hole of the optical disk from below. Thus, in the optical disk apparatus including a disk clamper that is separated from the clamper support member and chucks the optical disk on the disk table, the disk clamper holds the optical disk during loading and ejecting. An optical disk device comprising: urging means for urging upward to a position above a king position. 2. An optical disk apparatus according to claim 1, wherein said urging means for urging said disk clamper upward to a position above the chucking position of said optical disk is constituted by a magnet and a magnetic member. . 3. The apparatus according to claim 1, further comprising a strong magnet for magnetically attracting said disk clamper toward said disk table, and a weak magnet for weakly magnetically attracting said disk clamper to said upper position.
An optical disk device according to claim 1. 4. The clamper supporting member is made of a magnetic member, and a magnet is attached to the disk clamper, and between the magnet and the clamper supporting member and between the magnet and a centering guide of the disk table. 2. The optical disk drive according to claim 1, wherein the gap is controlled so that the upward biasing force of the disk clamper toward the upper position is weakened and the downward biasing force toward the disk table is increased. . 5. A disc tray on which an optical disc is loaded and loaded and ejected, and a centering guide fitted into a center hole of the optical disc, a direction substantially orthogonal to a surface direction of the optical disc placed on the disc tray. (Hereinafter, referred to as “the direction perpendicular to the disk surface”), the optical disk placed in the disk tray while moving in one direction in the direction perpendicular to the disk surface so that the centering guide fits into the center hole of the optical disk. The disk is separated from the disk tray by a disk table, and supported by a clamper support member on the opposite side of the disk table with the optical disk interposed therebetween. The optical disk is separated from the clamper support member and In an optical disc apparatus provided with a disc clamper for chucking between the disc table and the disc table, during loading and ejecting, the disc clamper is moved from the chucking position of the optical disc to a direction opposite to the side where the disc table is located in a direction perpendicular to the disc surface ( An optical disk device comprising: urging means for urging in a direction opposite to a table. 6. The optical disk device according to claim 5, wherein said urging means is constituted by a magnet and a magnetic member. 7. A strong magnet for magnetically attracting the disk clamper in a direction in which the disk table is positioned in a direction perpendicular to the disk surface (hereinafter, referred to as a “table direction”), wherein the urging means moves the disk clamper in a direction opposite to the table. 6. The optical disk device according to claim 5, further comprising a weak magnet for weakly attracting magnetic force in a direction. 8. A gap between the magnet attached to the disk clamper and the clamper support member and a magnet, wherein the clamper support member is formed of a magnetic member and a magnet is attached to the disk clamper. By controlling the gap between the disk clamper and the centering guide of the disk table, the urging force of the disk clamper in the direction opposite to the table is reduced, and the urging force of the disk clamper in the direction of the table is increased. The optical disk device according to claim 5. 9. An optical disk apparatus according to claim 5, wherein said urging means comprises a disk clamper formed of a magnetic member and a magnetic circuit provided on a side opposite to the table with respect to the disk clamper. . 10. The optical disk apparatus according to claim 5, wherein said urging means comprises a magnet provided on the disk clamper and a magnetic circuit provided on the side opposite to the table from the disk clamper.