JP2003187513A - Optical disk recording/playing-back device and optical disk used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk recording/playing-back device capable of accurately clamping an optical disk without adding any complex mechanism to the device, and an optical disk used for the same. <P>SOLUTION: The optical disk recording/playing-back device loads/unloads an optical disk 1 set in a disk tray 2 on a disk turntable 5. The optical disk has a taper shape part having a taper formed in the direction of the turntable on an outer peripheral side face, and the disk tray has an optical disk guide part having an inner peripheral side face formed to be brought into taper-contact with the taper shape part of the optical disk. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording / reproducing apparatus and an optical disk used for the same.

[0002]

2. Description of the Related Art Conventionally, in the case of recording / reproducing an optical disc, the disc is held by a disc turntable and a disc clamper in an optical disc recording / reproducing apparatus and a spindle motor is rotated, so that the optical disc is rotated by an optical pickup. Record of /
Record / playback the playback area. At this time, pull the optical disk into the device and hold it on the spindle motor, or
On the contrary, the disc transport unit ejects the optical disc held by the spindle motor to the outside of the apparatus. The conventional optical disc recording / reproducing apparatus has a disc transporting unit shown in FIG.
Generally, a disc tray (also called a loading tray) structure as shown in FIG.

As shown in FIG. 6A, the optical disk 18
Is the disc turntable 5 and the disc clamper 9
Therefore, it is necessary to hold the optical disc on the disc turntable 5 so that the center of the center hole 18b of the optical disc and the center of rotation of the spindle motor 4 coincide with each other. Therefore, on the disc tray 16, there is provided a guide portion 16a for guiding the outer peripheral end face portion 18a of the optical disc 18 so that the optical disc 18 does not shift due to vibration or shock during transportation.
Further, the spindle motor 4 has a first taper portion 6a for absorbing a positional deviation of the optical disc 18 conveyed by the disc tray 16, and an eccentricity of the optical disc caused by a variation in the central hole diameter of the optical disc 18. In order to reduce the noise, a centering hub 6 having a second taper portion 6b linearly movably supported on the rotation shaft of the spindle motor 4 is provided, and the center hole 18b of the optical disk 18 and the second taper portion of the center ring hub 6 are provided. By eliminating the gap with the optical disc 6b, the positional deviation of the optical disc during the optical disc transportation is corrected, and accurate holding on the disc turntable is realized.

Further, as disclosed in Japanese Patent Laid-Open No. 8-180629, the optical disc is rotatably supported by the optical disc so that the center hole of the optical disc is held when the optical disc is placed on the optical disc tray 16. There is a configuration in which the optical disc is held by the holding member so that the optical disc can be accurately held on the disc turntable even if there is vibration or impact during the transportation of the optical disc.

[0005]

In the structure shown in FIG. 6 (a), a gap is provided between the outer peripheral end face of the optical disc and the guide portion of the disc tray in order to facilitate mounting of the optical disc. The position of the optical disk may be displaced due to vibration or shock during the transportation of the optical disk, which may cause a chucking failure.

Further, in the structure in which the optical disc is held by the holding member rotatably supported on the disc tray, the holding member for the optical disc is rotatably supported on the disc tray, so that the vibration from the outside of the housing is absorbed. However, it is necessary to perform floating including the disc tray so as not to adversely affect the optical pickup for reading information on the optical disc. Therefore, the structure (mass) of the floating portion increases, and it becomes difficult to reduce the size of the optical disk recording / reproducing apparatus. Further, since the holder needs to be attached to and detached from the rotary shaft of the spindle motor each time it is conveyed, when rotating the holder holding the optical disc, it is necessary to prevent the holder from idling or coming off. However, there is a drawback in that a complicated locking mechanism is required and the device has a complicated structure.

Therefore, an object of the present invention is to provide an optical disk recording / reproducing apparatus capable of accurately clamping an optical disk without adding a complicated mechanism to the apparatus, and an optical disk used therefor.

[0008]

In describing the means for solving the above problems, the conventional embodiment will be described again, and a pattern for solving the technical problem of the embodiment will be described. I will do it.

FIG. 6 is a schematic side view for explaining an optical disc carrying method of an optical disc reproducing / recording apparatus according to a conventional embodiment. As shown in FIG. 6A, the outer peripheral end surface portion 18a of the conventional optical disc 18 has a curved surface shape perpendicular to the surface of the optical disc 18, and the guide portion 16a of the disc tray 16 that carries the optical disc 18 is In order to facilitate the attachment / detachment of the optical disc 18, a gap A is provided as shown in the figure. Therefore, there is a possibility that the position of the optical disk 18 may shift by the gap A at the maximum due to vibration or shock during transportation.

In order to improve the deviation of the gap A, FIG.
Shows a configuration in which the guide portion 17a of the disc tray 17 is tapered toward the turntable side to eliminate the gap. Since the contact portion between the optical disc 18 and the guide portion 17a of the disc tray 17 makes a line contact, it is weak against vibration and impact due to a small frictional force, and is not yet a sufficient solution. It should be noted that, as indicated by the chain double-dashed line in the figure, the optical disk tilts due to vibration or shock, and cannot be clamped by the centering hub 6 and the disk clamper 9.

FIG. 7 is a schematic side view for explaining a clamped state of an optical disc according to the conventional embodiment. Figure 7
(A) shows a state in which the optical disc 18 can be normally clamped, and the center hole 18b of the optical disc 18 is pressed upward by the second taper portion 6b of the centering hub 6 in the figure. Center hole 1 of the optical disk 18
The gap between 8b and the center ring hub 6 is eliminated, and the positioning is accurately performed.

FIG. 7B shows a state in which the optical disc 18 cannot be clamped properly. As described with reference to FIG. 6, when an optical disc is clamped when the position of the optical disc is shifted or tilted, generally, the spindle motor 4 rotates on the contact surface between the optical disc 18 and the disc turntable 5. The anti-slip member or the anti-slip processing 5a is applied to ensure transmission, so that the pressing force of the centering hub is less than the frictional force of the anti-slip member or the anti-slip processing 5a. A large gap D is generated.

From the above, in order to accurately clamp the optical disc on the disc turntable 5, the optical disc before the positioning of the optical disc and the turntable during the clamping by the centering hub 6 and the disc clamper 9 is conveyed. It is important to prevent misalignment of the disc while it is in progress.

The present invention further devises the idea shown in FIG. 6 (a), and in an optical disk recording / reproducing apparatus for loading / unloading an optical disk set in a disk tray to / from a disk turntable, the optical disk is provided on the outer peripheral side surface. An optical disc having a taper-shaped portion formed in the direction of the disc turntable, and the disc tray having an optical disc guide portion having an inner peripheral side surface that makes a taper contact with the taper-shaped portion of the optical disc. A recording / reproducing apparatus is configured.

The optical disk guide portion has an inner peripheral side surface that comes into surface contact with the tapered portion. The present invention further relates to an optical disc recording / reproducing apparatus for loading and unloading an optical disc set in a disc tray on a disc turntable, wherein the disc tray has a taper formed on the inner peripheral side surface in the direction of the disc turntable. The optical disc recording / reproducing apparatus is configured so that it has a tray taper portion and the optical disc has an outer peripheral side surface that makes a taper contact with the disc tray taper portion.

Further, the present invention is an optical disc set in a disc tray of an optical disc recording / reproducing apparatus, wherein a taper-shaped portion is formed on an outer peripheral side surface in a disc turntable direction provided in the optical disc recording / reproducing apparatus. There is provided an optical disc provided with.

Here, the tapered portion does not have to be formed on the entire outer peripheral side surface and has one or more tapered shapes.
It may be formed so as to contact the inner peripheral surface of the disc tray.

The taper-shaped portion makes surface contact with the disc tray taper-shaped portion of the disc tray, thereby avoiding the above-mentioned line contact and improving safety. It is not necessary to be surface contact in a strict sense, and stability can be maintained even by two line contacts on a virtual taper surface having a taper angle, and the two line contacts are formed in a staircase shape. can do. Therefore, here, the formation in which the upper and lower two line contacts in the virtual taper shape are also referred to as the taper shape. Further, the optical disc guide portion need not be provided on the entire inner peripheral side surface of the disc tray.

Further, the tapered portion or the disc tray tapered portion may be formed integrally with the optical disc or the disc tray, or may be formed as a separate body and incorporated into the optical disc or the disc tray to be an integrated body.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view illustrating an optical disc and an optical disc recording / reproducing device according to a first embodiment of the present invention. The optical disc 1 (corresponding to 18 in FIG. 6) is a CD, a CD-R, a DVD or a DVD-.
Light transmitting layer such as R, information storage layer, protective layer (not shown above)
And a disk-shaped information storage medium which is composed of a central hole 1b for rotating and holding the optical disk and which records / reproduces information by irradiating laser light. Further, the optical disk recording / reproducing apparatus displays a drive section for recording / reproducing information on the optical disk 1, a disk carrying section for carrying an optical disk, a signal processing section for processing a signal, a signal input / output section, and a status of the apparatus. A display unit, a control unit that controls each unit, an operation unit that gives an operation instruction, a power supply unit (not shown) that supplies power, and a housing unit 3 that covers each unit.

The outer peripheral end surface 1a of the optical disk 1 has a taper shape having an inclination angle on the disk turntable 5 side (lower side in the figure). The taper shape is a taper-shaped portion on one side of the optical disc, and serves as a guided portion. On the inner peripheral surface 20 of the disc tray 2 which is a part of the transport section of the optical disc recording / reproducing apparatus, the inclination angle of the outer peripheral end face portion of the optical disc is equal so that the outer peripheral end face portion 1a of the optical disc can be held by surface contact. An angle taper portion 2a is provided. The taper portion 2a serves as a disc tray taper portion and is arranged in a corresponding relationship with the above-mentioned taper portion to form an optical disc guide portion.

FIG. 2 is a schematic side view for explaining the optical disc carrying method of the optical disc recording / reproducing apparatus according to the first embodiment of the present invention. The disc tray 2 (corresponding to 16 in FIG. 6) is transported to a predetermined position in the housing 3 by the transport motor 14. The drive unit supports a spindle motor 4 and a disc turntable 5 for holding the optical disc 1 in rotation and a rotation shaft of the spindle motor 4 so as to be linearly movable, and the rotation center of the optical disc 1 is the rotation center of the spindle motor. A centering hub 6 for matching the optical disc 1 and an optical pickup 10 for recording / reproducing information on the optical disc 1. The disk turntable 5 is made of a mineral material such as iron that is attracted by magnetic force. The drive section is supported by the drive base 11, and the guide pin 12 supported by the housing 3 allows the guide groove 11 a of the drive base 11 to be guided.
Is linearly movable, and the drive of the drive base 11 is performed by a clamp motor 13. A disc clamper 9 for holding the optical disc 1 on the disc turntable 5 is rotatably supported by a clamp base 15 supported by the housing 3, and the disc turner 5 is rotated by a magnet portion 9a of the disc clamper 9. Adsorb to the table 5.

The centering hub 6 is pressed upward in the drawing by a compression spring 7, and a stopper 8 is provided to prevent the centering hub 6 from coming off the rotary shaft of the spindle motor 4. It is supported on the rotary shaft of the spindle motor 4.

FIG. 3 is a schematic side view illustrating an optical disc clamping method of the optical disc device according to the first embodiment of the present invention. The optical disc 1 is clamped by moving the drive section upward in the figure by the clamp motor 13. At this time, a slight positional deviation between the center of the centering hub 6 and the center of the center hole 1b of the optical disc 1 is corrected by the first taper portion 6a, and further the second taper portion 6b is used to correct the optical disc 1 by the second taper portion 6b. The optical disc 1 is positioned by eliminating the gap caused by the error in the center hole diameter.

In this embodiment, the carry motor 14 is used.
The clamp motor 13 is divided into two for ease of explanation, but one motor may be used to carry the optical disk and clamp.

As described above, with the configuration of the present invention, the outer peripheral end face portion 1a of the optical disc 1 and the disc tray 2 are
Since the taper portion 2a of No. 2 is always in surface contact with each other and no gap is formed, the outer peripheral end face portion 1a and the taper portion 2 are
The frictional force of a can be increased, and there is an effect that the optical disc is less likely to be displaced from the predetermined position of the disc tray due to vibration or impact during the transportation of the optical disc. for that reason,
When the optical disc 1 is clamped by the centering hub 6 and the disc clamper 9, there is almost no need to correct the displacement of the disc, and the clamping accuracy is improved.

In the first embodiment described above, the information reading surface of the optical disk is only the lower surface, and moreover, the structure is effective only when the position of the optical pickup in the optical disk recording / reproducing apparatus is located below the optical disk. Depending on the optical disc recording / reproducing apparatus, the optical pickup may be located above the optical disc. In such cases,
A second embodiment as shown in FIG. 4 described later is effective.

FIG. 4 is a schematic side view for explaining the shape of the optical disc according to the second embodiment of the present invention. The outer peripheral end face of the optical disc 1 is provided with a first taper portion 1c and a second taper portion 1d symmetrically on the upper surface side and the lower surface side, that is, in the disk turntable side direction and the opposite direction, respectively. Therefore, the taper portions 1c and 1d of the outer peripheral end surface of the optical disc 1 and the taper portion 2 of the disc tray 2 are formed.
Although the contact area with a is halved, even when the optical disk 1 is placed on the disk tray 2 with its upper and lower surfaces reversed, it is possible to prevent displacement due to vibration or shock during the transportation of the optical disk. .

FIG. 5 is a schematic side view for explaining the shape of the optical disc according to the third embodiment of the present invention. this is,
1 is an embodiment in which two optical disks each having a signal reading surface on one side are laminated to form a double-sided disk.
This is the same as when two optical disks 1 of No. 1 were attached. In this way, even when two optical disks 1 are stuck together,
Similar to the second embodiment shown in FIG. 4, there is an effect of preventing a shift due to vibration or shock during transportation of the optical disk.

[0030]

According to the optical disk and the optical disk recording / reproducing apparatus of the present invention, the outer peripheral surface of the optical disk is provided with a taper portion, and the optical disk mounting portion of the disk tray of the optical disk recording / reproducing apparatus is provided with the taper portion of the optical disk. For example, a tapered guide having the same inclination angle is provided. According to this configuration, even if there is vibration or shock during the transportation of the optical disc, the contact area between the optical disc and the disc tray is large, so that the disc is strong against displacement and inclination, and the position of the center hole of the optical disc does not shift. Also, even when the disc turntable is clamped, no clamping failure occurs.

Further, since the shapes of the outer peripheral end face of the optical disc and the guide portion of the disc tray of the optical disc recording / reproducing apparatus are simply changed, it is not necessary to add a complicated mechanism to the apparatus. Therefore, the optical disc can be clamped accurately without adding a complicated mechanism to the device.

[Brief description of drawings]

FIG. 1 is a schematic side view illustrating the shape of an optical disc and an optical disc recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic side view illustrating an optical disc carrying method of the optical disc recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 3 is a schematic side view illustrating an optical disc clamping method of the optical disc recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 4 is a schematic side view explaining the shape of the optical disc according to the second embodiment of the present invention.

FIG. 5 is a schematic side view explaining the shape of an optical disc according to a third embodiment of the present invention.

FIG. 6A is a schematic side view illustrating an optical disc carrying method of an optical disc recording / reproducing apparatus according to a conventional embodiment. (B) is a schematic side view explaining the pattern in the process of thinking.

FIG. 7 is a schematic side view illustrating a clamped state of an optical disc according to a conventional embodiment.

[Explanation of symbols]

1, 18 ... Optical disc, 1a, 18a ... Outer peripheral end face portion, 1
b, 18b, 18c ... central hole, 2, 16, 17 ... disc tray, 2a, 17a ... taper part, 3 ... housing, 4 ... spindle motor, 5 ... disc turntable, 5a ...
Anti-slip member, 6 ... Centering hub, 6a ... First taper portion, 6b ... Second taper portion, 7 ... Spring, 8 ... Stopper, 9 ... Disk clamper, 10 ... Optical pickup, 1
DESCRIPTION OF SYMBOLS 1 ... Drive base, 11a ... Guide groove, 12 ... Guide pin, 13 ... Clamp motor, 14 ... Conveying motor, 15
... Clamp base, 16a ... Guide part, 16b ... Projection part.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 17/035 G11B 17/035 F term (reference) 5D046 AA16 CB11 EA04 EA17 EB04 HA10 5D090 AA01 CC12 CC14 CC16 DD02 HH03 JJ05 LL07 5D138 RA05 RA11 SA01 SA17 TA02 TA14 TA22 TC05 TC20 TC22 TD04 TD06

Claims (5)

[Claims] 1. An optical disk recording / reproducing apparatus for loading and unloading an optical disk set in a disk tray on a disk turntable, wherein the optical disk has a tapered portion formed on an outer peripheral side surface in the direction of the disk turntable. Have
The optical disc recording / reproducing apparatus is characterized in that the disc tray has an optical disc guide portion having an inner peripheral side surface that comes into contact with the tapered portion of the optical disc. 2. The optical disc recording / reproducing apparatus according to claim 1, wherein the optical disc guide portion has an inner peripheral side surface that comes into surface contact with the tapered portion. 3. An optical disc recording / reproducing apparatus for loading and unloading an optical disc set in a disc tray on a disc turntable, wherein the disc tray has a taper formed on an inner peripheral side surface in the disc turntable direction. An optical disc recording / reproducing apparatus having a tapered portion, and the optical disc having an outer peripheral side surface that is in surface contact with the tapered portion of the disc tray. 4. An optical disc set in a disc tray of an optical disc recording / reproducing apparatus, wherein an outer peripheral side face is provided with a tapered taper portion. 5. The taper-shaped portion according to claim 4,
An optical disc, characterized in that it is formed on both sides of the outer peripheral side face with the substantially center as a boundary.