JP2975852B2 - Optical information recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording / reproducing apparatus for recording and / or reproducing information by irradiating a light beam onto a disk-shaped optical information recording medium. More specifically, even if the optical information recording medium of different specifications, that is, the optical information recording medium with or without a hub is of a single specification or a specification housed in a cartridge, one optical information recording medium regardless of them. The present invention relates to a dual-purpose optical information recording / reproducing apparatus capable of recording and / or reproducing information on / from an optical information recording medium of a different specification by the above apparatus.

[0002]

2. Description of the Related Art Disc-shaped optical information recording media are classified into a read-only type, a write-once type, and a rewritable type. Rewritable type includes magneto-optical method, phase change (crystalline amorphous transformation)
Systems, organic dye systems, and the like. Of these, magneto-optical disks are frequently used.

The read-only type is widely used as a video disk, a compact disk (CD), a CD-ROM, and the like. This type is generally standardized as having a center hole at the center of a disk, and is used in large quantities. This is taken out of the storage cartridge, placed on a tray of the playback device in a single state, moved to the playback position, and then aligned on the turntable using the center hole at the same position, and clamped. And
The recorded information can be read and reproduced by an optical head.

[0004] Of the write-once type and the rewritable type, a diameter of 1
The standard of 30 mm was determined in 1990. In this cartridge, a disk provided with a hub for centering and a magnet clamp made of a thin metal plate made of a magnetic material in a center hole formed in the center of the disk is housed in a cartridge. Then, the cartridge is attached to the recording / reproducing apparatus as it is, the shutter provided on the cartridge is opened, and the magnetic body provided on the turntable is adjusted while aligning on the turntable of the recording / reproducing apparatus using the hub of the disk. The hub is magnetically attached so that information can be recorded on the disk or information can be read from the disk by the optical head and the magnetic head for recording.

As described above, the write-once and rewritable disc recording / reproducing apparatuses can exchange media because the centering method and the clamping method are the same as the standard.
The drive means, optical head and the like of one recording / reproducing apparatus can be shared. However, a read-only disc such as a CD or a CD-ROM is different from a centering method, a clamp method,
Since specifications such as the presence or absence of storage in a cartridge are different, media is not compatible, and a write-once or rewritable recording / reproducing apparatus cannot be used as it is. Therefore, a reproducing apparatus for a read-only optical information recording medium or a recording / reproducing apparatus for a write-once or rewritable optical information recording medium has been manufactured.

[0006] In recent years, with the progress of multimedia, it has become increasingly necessary to effectively utilize an optical information recording medium capable of handling a large amount of information. As described above, manufacturing a reproduction apparatus for a read-only optical information recording medium, or a recording / reproduction apparatus for a write-once or rewritable optical information recording medium, respectively, requires driving of a similar or similar structure. This means that two units, such as means and expensive optical heads, are used, which increases the manufacturing cost. Also, from the user's standpoint, only the installation space for optical information recording media equipment requires two units: a read-only type, a write-once type, and a rewritable type. Given the need for expansion of other information recording medium devices such as discs and input / output devices such as image scanners, optical information recording medium devices such as read-only type, write-once type, and rewritable type It is preferable that such a similar device be as space-saving as possible and easy to use. Therefore, in order to quickly respond to the multimedia, for example, a CD or CD-ROM having a diameter of 12
0mm read-only optical information recording medium and 130m diameter
It is desirable that the recording / reproducing apparatus can be used by a common recording / reproducing apparatus regardless of a difference in specifications from a rewritable optical information recording medium which is a magneto-optical disk of m.

On the other hand, a read-only optical information recording medium such as a CD or a CD-ROM is taken out of a storage cartridge at the time of use, and mounted and used alone in a reproducing apparatus. Hand stains, fingerprints, dust, etc. easily adhere to the surface of the CD-ROM.
-Foreign matter is likely to be present on the surface of the ROM during reproduction, which may cause defective reproduction of recorded information. To prevent this,
It is preferable that the recorded information can be reproduced with the CD and the CD-ROM stored in the cartridge.

For this purpose, even if the optical information recording medium has a different specification as described above, the optical head and the like are shared, and the optical information recording medium can be used in any of the read-only type, the write-once type, and the rewritable type. A recording / reproducing apparatus that can flexibly cope with the above is preferable from the viewpoints of manufacturing cost, ease of specification, and the like.

[0009]

SUMMARY OF THE INVENTION The present invention has been made as a result of diligent research in view of the above-described circumstances, and has different specifications such as a centering method, a clamping method, and the presence or absence of storage in a cartridge. Regardless, the drive means, the optical head, etc. are shared, and a recording / reproducing apparatus capable of flexibly coping with any of the read-only type, the write-once type, and the rewritable type optical information recording medium with one unit, in other words, the hub To provide an optical information recording / reproducing apparatus which can be mounted on an optical information recording medium having no hub, an optical information recording medium having no hub, an optical information recording medium alone and an information recording medium housed in a cartridge. Aim.

[0010]

In order to solve the above-mentioned problems, the present invention provides (i) irradiating a light beam on a surface of a disk-shaped optical information recording medium having or not having a hub in a center hole. As an optical information recording / reproducing apparatus for recording and / or reproducing information according to the present invention, a tray having a first mounting portion and a second mounting portion, a center shaft rotated by a rotation driving means, a magnetic material, Core means, and a turntable provided with a support surface and fixed to the center shaft, and capable of coming and going with the support surface,
And a holding mechanism comprising a clamp means for pressing and holding the optical information recording medium having no hub on the support surface.

(Ii) The holding mechanism includes a magnetic body concentric with the center shaft for magnetically attaching the hub, a centering means concentric with the magnetic body, and a support surface concentric with the centering means. An optical information recording device comprising a turntable formed of a magnetic material and a disk-shaped clamper having a magnetic material fixed at the center, and having no hub due to magnetic attraction between the magnetic material of the clamper and the magnetic material concentric with the center shaft. It may be constituted by a clamp means which presses and holds the medium on the support surface of the turntable.

[0012] (iii) The centering means is a cylindrical member provided with a conical centering outer peripheral surface slidable up and down on the upper surface of the turntable along a cylindrical portion provided on the center shaft side. It is preferable that the member be composed of a member and an elastic member that urges the cylindrical member upward. (Iv) When the presence / absence of a hub of the optical information recording medium is detected by the detecting means to be absent of the hub, the optical information recording medium having no hub is pressed and held against the support surface of the turntable by the clamping means. You may do so.

[0013]

[Action]

According to (i), the tray is pulled out to the exchange position of the optical information recording medium, and in the case of the optical information recording medium alone, the optical information recording medium alone is mounted on the first mounting portion of the tray, and the cartridge is mounted on the cartridge. In the case of the stored optical information recording medium, a cartridge is mounted on the second mounting portion of the tray and drawn into the information recording and / or reproducing position of the recording / reproducing apparatus, and these optical information recording media are moved to the center. If the hole does not have a hub, the hole is aligned by the centering means and clamped by the clamp means between the turntable support surface. The hub is magnetically held by the magnetic attraction of the body.

According to (ii), in the case of an optical information recording medium having no hub in the center hole, the center hole is aligned by the centering means, and the magnetic material of the clamper and the magnetic material concentric with the center shaft. The optical information recording medium is pressed against and held on the support surface of the turntable by magnetic attraction with the body, and in the case of an optical information recording medium having a hub, the optical information recording medium is aligned by the alignment means and the magnetic material on the upper surface of the turntable. The magnetic attraction force causes the hub to be magnetically held.

According to (iii), in the case of an optical information recording medium having no hub in the center hole, the center hole is automatically aligned along the conical outer peripheral surface of the cylindrical member, and the magnetic material of the clamper is adjusted. In the case of an optical information recording medium having a hub, the center hole of the hub is formed by a cylindrical member. Is self-aligned along the outer peripheral surface of the conical shape, the hub presses the cylindrical member downward, and the magnetic adhesion between the hub and the magnetic material on the upper surface of the turntable is held.

According to (iv), when the presence / absence of a hub of the optical information recording medium is detected by the detecting means to be no hub, the optical information recording medium having no hub is clamped by the clamping means to the turntable support surface. When it is detected that the hub is present, the magnetic adhesion is automatically held by the magnetic attraction of the hub and the magnetic material on the upper surface of the turntable without any intervening clamp means.

[0017]

The present invention will be described below in more detail with reference to examples. Of course, the present invention is not limited by the following examples. FIG. 1 is an overall perspective view of an optical information recording / reproducing apparatus according to an embodiment of the present invention.
Is a perspective view of the tray. 3A and 3B are cross-sectional views showing a holding mechanism of an optical information recording medium used in the optical information recording / reproducing apparatus of FIG. 1, wherein FIG. 3A shows a state where the optical information recording medium is not mounted, and FIG. Shows a state in which an optical information recording medium having no hub is held, and FIG. 7C shows a state in which an optical information recording medium having a hub housed in a cartridge is held. FIG. 4 is a sectional view of the optical information recording / reproducing apparatus.

As shown in FIGS. 1 and 2, the tray (1) of the optical information recording / reproducing apparatus (A) includes an optical information recording medium (30), for example, a CD, a CD-ROM, or A first mounting portion (1a) on which a single optical information recording medium (31) having a hub for magnetic clamping can be mounted as it is, and optical information in which, for example, a CD or CD-ROM is stored in a cartridge (32) A second mounting portion (1b) on which a recording medium (33) or an optical information recording medium (34) such as a commercially available magneto-optical disk having a hub for magnetic clamping and housed in a cartridge can be mounted. Have.
The first mounting portion (1a) and the second mounting portion (1b) are configured in two stages, and the first mounting portion (1a) has a mounting surface formed of a disc-shaped recess, and has a center. A U-shaped opening (1c) is formed from the vicinity to the rear. If the diameter of the optical information recording medium is different, a disk provided with a plurality of disc-shaped concave portions having different diameters may be employed (not shown). When the tray (1) is moved to the recording and / or reproducing position, the opening (1c) receives a turntable (8) and an optical head (18), which will be described later, and allows the optical head to move in the radial direction. It constitutes a space. Pins (4) for positioning the cartridge are implanted at four corners of the second mounting portion (1b), and the pins (4) receive positioning holes (not shown) provided on the back surface of the cartridge. Thus, the cartridge is mounted at a predetermined position of the second mounting portion (1b) of the tray (1). Guide rails (3) are provided on both sides of the tray (1), and the tray (1) can be moved along a guide (not shown) provided in the apparatus. A rack (2) is provided on one side of the tray (1), and a gear provided on the feed motor is designed to mesh with the rack (2) (not shown), and an eject switch (5) is provided. ), The feed motor is rotated forward and reverse, and the tray (1) can reciprocate back and forth between the recording and / or reproducing position and the disk exchange position. It is needless to say that the rack (2) may be provided on the opening side of the tray (1).

As shown in FIG. 3 (a), the optical information recording medium holding mechanism includes a turntable (8) fixed to a center shaft (7) rotated by a spindle motor (6), and a clamping means. (9). An annular concave groove is formed on the upper surface of the turntable (8) concentrically with the center shaft (7), and an inner cylindrical part (8a) and an outer cylindrical part (8b) are formed. I have. An annular magnet (10) is fixed on the upper surface of the inner cylindrical portion (8a) concentrically with the center shaft (7), and a hub of an optical information recording medium having a hub is magnetically attached. I have. The inner and outer cylindrical portions (8
A compression coil spring (11) is loosely fitted between a) and (8b). Above the compression coil spring (11), a tubular member (12) for centering is slidably fitted in the vertical direction. An upper end of the cylindrical member (12) is provided with a flange (12a) having a conical centering outer peripheral surface.
By contacting the compression coil spring (11) with the lower surface of 2a), the tubular member (12) is urged upward. On the other hand, inside the cylindrical portion (8b) on the outer peripheral side, a step portion (8
c) is provided, and a flange (8e) having a flat support surface (8d) for supporting the optical information recording medium is provided on the outside.

The turntable (8) moves up and down between a standby position and a recording and / or reproducing position together with a main chassis (13) to which a spindle motor (6) is fixed as described later (see FIG. 4). It is possible to go back and forth.

A center shaft (7), and
Above the support surface (8d) of the turntable, a clamp means (9) having a disk-shaped clamper (14) and a support plate (15) rotatably supporting the clamper (14) with a predetermined clearance from the clamper. ) Are provided so as to be able to approach and separate from the center shaft (7) and the turntable (8). As the contact / separation mechanism for this purpose, for example, an appropriate mechanism such as a mechanism in which the support plate (15) is connected to a swing arm or the like so that the support plate (15) can be raised and lowered horizontally can be adopted. . A magnetic body (14a) is fixed concentrically at the center of the clamper (14), and the clamper is provided by a magnetic attraction between the magnetic body (14a) and the annular magnet (10) concentric with the center shaft (7). An optical information recording medium without a hub is pressed against and held on the support surface (8d) of the turntable at the lower end plane of the annular projection (14b) provided on the lower surface of the outer periphery of (14),
It can rotate integrally with the optical information recording medium. In the case of an optical information recording medium having a hub,
The contact / separation mechanism of the clamper (14) does not operate, and the clamper (14) is maintained at a predetermined upper position without being magnetically attached to the center shaft (7).

Accordingly, the optical information recording medium alone (30) having no hub, for example, a CD or a CD-ROM is shown in FIG.
As shown in (b), the center is adjusted by the turntable (8) as described above, and is pressed and held between the clamper (14) and the support surface (8d) of the turntable. That is, the optical information recording medium alone (30) as the turntable (8) rises from the standby position at the recording and / or reproducing position to the recording and / or reproducing position.
Center hole (30a) is brought into contact with the conical centering outer peripheral surface of the flange portion (12a) of the tubular member (12), and the centering is performed automatically. Due to the magnetic attraction of the magnetic body (14a) of the clamper and the annular magnet (10) concentric with the center shaft (7), optical information without a hub at the lower end plane of the annular projection (14b) on the outer peripheral lower surface of the clamper. Recording medium only (30)
Is pressed against the support surface (8d) of the turntable in an aligned state, and is held.

The clamping means is not limited to the structure as described above. The annular protrusion provided on the lower surface of the outer periphery of the clamper is made of a magnetic material, and a magnetic attraction is applied to the magnetic member and the support surface of the turntable. Needless to say, an appropriate known structure such as one that holds the optical information recording medium in pressure contact can be employed.

On the other hand, an optical information recording medium (34) having a hub (35) housed in a cartridge (36), for example, a magneto-optical disk, as shown in FIG. ), The hub (35) is magnetically attached to the annular magnet (10) of the turntable, and is held on the support surface (8d). That is, in the optical information recording medium (34), a hub (35) having a loose fitting hole (35a) is fixed to an annular step (34a) provided along the center hole, and the annular step is formed. (34
It has a structure in which an annular protrusion (34b) protrudes from the lower surface of (a), and is housed in the cartridge (36). Then, as the turntable (8) rises from the standby position to the recording and / or reproducing position, the loose fitting hole (35a) of the hub (35) loosely fits on the center shaft (7), and then the lower surface has an annular shape. Projection (34b)
Is brought into contact with the conical centering outer peripheral surface of the flange portion (12a) of the tubular member (12), and the hub (3) is automatically aligned.
5) is magnetically attached to the annular magnet (10) of the turntable. At this time, the tubular member (12) is provided with a compression coil spring (1).
1) is pressed, and slides down along the cylindrical portion (8a) on the inner peripheral side of the turntable (8) to be flush with the annular magnet (10). As a result, the optical information recording medium (34) having the hub housed in the cartridge (36) is supported in a state where the optical information recording medium (34) is aligned with the support surface (8d) of the turntable, and the optical information recording medium (34) is aligned. Is magnetically held.
At this time, the clamping means (9) is maintained at the raised position.

Next, the optical information recording / reproducing apparatus (A) will be further described with reference to FIG. As shown in FIG. 4, the housing (14) is provided with a slot (14a), and the tray (1) is guided from the slot (14a) by a guide (not shown).
Thereby, reciprocating movement is possible in a moving path between the recording and / or reproducing position and the exchange position. A limit switch (15) for detecting that the tray (1) is at the recording and / or reproducing position is provided on a rear extension line of the slot (14a). In addition, tray (1)
A rubber roller (16) is always urged downward by a presser spring (17). The rubber roller (16) presses the upper surface of the cartridge and reciprocates the tray (1) when the cartridge is mounted on the second mounting portion (1b) of the tray and transferred into the moving passage of the tray (1). Rolled by movement.

A clamper (14) is disposed above the recording and / or reproducing position, and a turntable (8) is disposed below the recording and / or reproducing position. The turntable (8) is located at the center of the spindle motor (6). It is integrally fixed to the shaft (7). The spindle motor (6) is fixed to a main chassis (13) movable up and down between a standby position and a recording and / or reproduction position, and an optical head (18) is mounted on the main chassis (13). It is arranged to be able to reciprocate in the direction. The turntable (8) and the optical head (18) are inserted into the opening (1c) of the tray (1) during recording and / or reproduction. At an upper position facing the optical head (18), for example, a magnetic head for recording information on a magneto-optical disk is disposed facing the optical head (18). It can be moved in conjunction with the back and forth movement of (18) (not shown).

An opening mechanism having a well-known structure for opening a shutter of the cartridge as the cartridge mounted on the second mounting portion (1b) of the tray is transferred into the apparatus, and an optical information recording device. Means for detecting the presence or absence of a media hub;
Means for detecting whether or not the optical information recording medium is stored in the cartridge is provided in the apparatus (both are not shown). The presence or absence of the cartridge can be determined by appropriate means such as providing a strain sensor for detecting the strain of the pressing spring (17) of the rubber roller (16) on the pressing spring (17). In order to detect the presence or absence of the hub, for example, a magnetic sensor is disposed in the middle of the moving path of the tray (1) to magnetically detect a metal hub which is a magnetic material. An appropriate means such as a structure in which a concave portion or the like capable of determining the presence or absence of a mark is provided, and this is detected can be employed.

The recording and / or reproducing operation on the optical information recording medium by the optical information recording / reproducing apparatus configured as described above will be described below. First, based on FIG. 5, the optical information recording / reproducing device (A) has no hub and the optical information recording medium alone (30), for example, CD, CD-R
The operation of mounting the OM will be described below.

(A) FIG. 5 (a) shows a standby state before mounting the optical information recording medium alone (30). The tray (1) is at a predetermined standby position, that is, at a recording and / or reproducing position, the rear end surface of the tray (1) is in contact with the limit switch (15), and the limit switch is pressed to be energized; The clamper (14), the turntable (8), and the optical head (18) are also at the standby position.

(B) When the eject switch (5) is pressed in the state of FIG. 5 (a), the feed motor is operated by the signal, and the rotation of the feed motor is transmitted to the rack (2) of the tray (1) via the gear. The limit switch (15) is transmitted when the tray (1) starts to be pulled out to the replacement position.
Is stopped, the tray (1) is continuously pulled out, and when the tray (1) reaches the replacement position, the feed motor is stopped by an appropriate detecting means. Then, when the optical information recording medium alone (30) having no hub is placed on the first placing portion (1a) of the tray and the eject switch (5) is pressed again, the feed motor is rotated in reverse by the signal. Then, the tray (1) starts to be drawn toward the recording and / or reproducing position (see FIG. 5B).

(C) When the tray (1) is continuously pulled in and reaches the recording and / or reproducing position, the rear end face of the tray (1) presses the limit switch (15), and the limit switch is turned on. Then, the rotation of the feed motor is stopped (see FIG. 5C). As the tray (1) is pulled in, the optical information recording medium (30)
Is detected by the detecting means as described above.

(D) Based on a detection signal from the detection means that the hub is not housed in the cartridge and has no hub, the clamper (14) starts lowering and the main chassis (13) is moved from the standby position to the recording and / or reproducing position. Start to rise towards. Then, a center hole (30a) of the optical information recording medium alone (30) having no hub.
Is brought into contact with the conical centering outer peripheral surface of the flange portion (12a) of the cylindrical member (12) of the turntable (8), and is automatically aligned. Then, the optical information recording medium alone (30) )
Is supported by the support surface (8d) of the turntable and rises to a predetermined position, and the magnetic attraction between the magnetic body (14a) of the clamper and the annular magnet (10) concentric with the center shaft (7) of the spindle motor. Thus, the optical information recording medium alone (30) is pressed and held between the support surface (8d) of the turntable and the clamper (14) (FIG. 5).
(D), see FIG. 3 (b)). Since the optical head (18) has reached a predetermined reproduction position with the rise of the main chassis (13), it is possible to perform a reproduction operation.

In order to eject the optical information recording medium (30) having no hub from the apparatus (A), the operation reverse to that described above is performed.

Next, based on FIG. 6, an optical information recording medium (34) having a hub (35) housed in a cartridge (36) in an optical information recording / reproducing apparatus (A), for example, a magneto-optical disk The operation for mounting is described below. (E) FIG. 6 (a) is a standby state before the optical information recording medium (34) is mounted similarly to FIG. 5 (a), and the description is omitted (see (a) above).

(F) The operation of pulling out the tray (1) from the state of FIG. 6 (a) to the replacement position is the same as the above (b), so that the description is omitted. After the tray (1) is pulled out, the optical information recording medium (34) having the hub housed in the cartridge is positioned and mounted on the second mounting portion (1b) of the tray by the pin (4), When the eject switch (5) is pressed again, the signal causes the feed motor to rotate in the reverse direction, and the tray (1) starts to be drawn toward the recording and / or reproducing position (FIGS. 6 (b) and 3).
(C)).

(G) As the tray (1) is pulled in,
When the shutter of the cartridge is opened and reaches the recording and / or reproducing position, the rear end face of the tray (1) presses the limit switch (15), the limit switch is energized, and the rotation of the feed motor is stopped. (See FIG. 6C). As the tray (1) is pulled in, the presence or absence of the optical information recording medium in the cartridge and the presence of the hub are detected by the detection means as described above.

(H) The clamper (14) is maintained at the raised position and the turntable (8) is moved from the standby position for recording and recording, based on the original detection signal from the detecting means having the hub housed in the cartridge. And / or begin to ascend toward the playback position, and the loose fitting hole (35) of the hub (35) exposed from the opening of the shutter of the cartridge (36).
a) is loosely fitted on the center shaft (7), and then the annular projection (34b) on the lower surface is fitted to the flange (12) of the tubular member (12).
The hub (35) is magnetically attached to the annular magnet (10) of the turntable while abutting on the conical centering outer peripheral surface of (a) and automatically aligning. At that time, the tubular member (12)
The compression coil spring (11) is pressed, and slides downward along the cylindrical portion (8a) on the inner peripheral side of the turntable (8) to be flush with the annular magnet (10). As a result, the optical information recording medium (34) having the hub housed in the cartridge is supported in a state where the optical information recording medium (34) is aligned with the support surface (8d) of the turntable, and the optical information recording medium (34) is It is put on and held (see FIGS. 6D and 4C). At this time, the optical head (18) has reached a predetermined recording and / or reproducing position with the rise of the main chassis (13). In the case of a magneto-optical disk, the magnetic head (not shown) can also move to a predetermined recordable position. , The recording and / or reproducing operation can be performed.

In order to eject the optical information recording medium (34) having the hub housed in the cartridge from the apparatus (A), the operation reverse to the above is performed.

As described above, the optical information recording / reproducing apparatus (A) has no hub and the optical information recording medium alone (30), for example, the operation of mounting a CD or a CD-ROM, and the hub housed in a cartridge. The operation of mounting an optical information recording medium (34), for example, a magneto-optical disk, has been described, but an optical information recording medium having a hub alone, and an optical information recording medium having no hub adapted to be housed in a cartridge Can be mounted on the optical information recording / reproducing apparatus (A), but the description thereof is omitted.

[0040]

Since the present invention is configured as described above in detail, it has the following effects. (I) a tray having a first mounting portion for a single optical information recording medium, a second mounting portion for a cartridge containing the optical information recording medium, and a center shaft rotated by a rotation driving means. A magnetic body, a centering means of an optical information recording medium, and a turntable fixed to the center shaft provided with a support surface for supporting the optical information recording medium, which can be brought into contact with and separated from the support surface, And a holding mechanism comprising a clamping means for pressing and holding the optical information recording medium having no hub against the support surface of the turntable. Regardless of the difference in specifications,
A single optical information recording / reproducing apparatus records and / or reproduces a read-only type, a write-once type, and a rewritable type optical information recording medium by sharing a drive unit, an expensive optical head, and the like. This makes it possible to provide an inexpensive and space-saving optical information recording / reproducing apparatus compatible with multimedia. This single optical information recording / reproducing apparatus can handle both an optical information recording medium with or without a hub and an optical information recording medium with or without a hub housed in a cartridge. It is also convenient for the user.

(Ii) In the case of an optical information recording medium having no hub in the center hole, the center hole of the optical information recording medium is automatically aligned with high accuracy along the conical outer peripheral surface of the cylindrical member. The optical information recording medium is pressed against the support surface of the turntable by magnetic attraction between the magnetic material of the clamper and the magnetic material concentric with the center shaft, and in the case of an optical information recording medium having a hub, the center of the hub is The hole is self-aligned with high precision along the conical outer peripheral surface of the cylindrical member, and the hub presses the cylindrical member downward and magnetically adheres and is held by the magnetic attraction of the hub and the magnetic material on the upper surface of the turntable. Thus, good recording and / or reproduction without recording and / or reproduction mistakes can be performed.

(Iii) Since the optical information recording medium alone can be stored in a cartridge and mounted on an optical information recording / reproducing apparatus to perform recording and / or reproduction, hand marks and fingerprints on the surface of the optical information recording medium can be obtained. By preventing adhesion of dust and the like, and by preventing foreign matter from intervening on the surface of the optical information recording medium during recording and / or reproduction, defective recording and / or reproduction of information can be avoided.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an optical information recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the tray shown in FIG.

FIGS. 3A and 3B are cross-sectional views showing a holding mechanism of the optical information recording medium used in the optical information recording / reproducing apparatus of FIG. 1, wherein FIG. 3A shows a state where the optical information recording medium is not mounted, and FIG. Shows a state in which an optical information recording medium having no hub is held, and FIG. 7C shows a state in which an optical information recording medium having a hub housed in a cartridge is held.

FIG. 4 is a sectional view of an optical information recording / reproducing apparatus.

FIG. 5 is an operation explanatory diagram of mounting an optical information recording medium alone without a hub in the optical information recording / reproducing apparatus.

FIG. 6 is an explanatory diagram of an operation of mounting an optical information recording medium having a hub housed in a cartridge to the optical information recording / reproducing apparatus.

[Explanation of symbols]

 A optical information recording / reproducing device 1 tray 1a first mounting portion 1b second mounting portion 7 center shaft 8 turntable 8d support surface 12 tubular member 14 clamper

Claims (3)

(57) [Claims] 1. An optical information recording / reproducing apparatus for recording and / or reproducing information by irradiating a light beam onto a surface of a disk-shaped optical information recording medium having or not having a hub in a center hole. A first mounting portion for an optical information recording medium alone, and a second mounting portion for a cartridge containing the optical information recording medium, wherein information is recorded and / or reproduced and optical information recording is performed. A tray that can reciprocate between a medium exchange position, a center shaft that is rotated by a rotation drive unit, a magnetic body, a core alignment unit for an optical information recording medium, and a support that supports the optical information recording medium A turntable fixed to the center shaft; and an optical information recording medium having no hub and capable of coming into contact with and separating from the support surface of the turntable. A holding mechanism comprising a clamp means for pressing and holding the holding surface and a means for detecting the presence or absence of a hub of the optical information recording medium are provided.
Ri, clan based on a detection signal that no hub by detecting means
Information recording medium without hub
To the turntable support surface.
Optical information recording and reproducing apparatus, characterized in that the. 2. A hub having or having a center hole.
Irradiate a light beam on the optical disc
Record and / or reproduce information by shooting
An optical information recording / reproducing apparatus, comprising: a first mounting portion for an optical information recording medium alone;
A second mounting portion for a cartridge containing a recording medium.
Recording and / or reproducing position of information and optical information recording
A tray that can reciprocate between a recording medium exchange position, a center shaft that is rotated by a rotation drive unit, and a magnetic body provided concentrically with the center shaft, and an optical information recording medium that is concentric with the magnetic body. A centering means is provided, a turntable provided with a support surface that supports the optical information recording medium concentrically with the centering means, and a disk-shaped clamper having a magnetic material fixed at the center, A holding mechanism comprising clamping means for holding an optical information recording medium having no hub on the support surface of the turntable by press-contact with a magnetic attraction between the magnetic material of the clamper and the magnetic material concentric with the center shaft ; Optical information recording medium
Means for detecting the presence or absence of a hub.
Information recording medium without hub
To the turntable support surface.
Optical information recording and reproducing apparatus, characterized in that the. 3. A hub having or having a hub in a center hole.
Irradiate a light beam on the optical disc
Record and / or reproduce information by shooting
An optical information recording / reproducing apparatus, comprising: a first mounting portion for an optical information recording medium alone;
A second mounting portion for a cartridge containing a recording medium.
Recording and / or reproducing position of information and optical information recording
A tray that can reciprocate between a recording medium exchange position, a center shaft that is rotated by a rotation drive unit, and a magnetic body provided concentrically with the center shaft, and an optical information recording medium that is concentric with the magnetic body. A centering means is provided, a turntable provided with a support surface that supports the optical information recording medium concentrically with the centering means, and a disk-shaped clamper having a magnetic material fixed at the center, A holding mechanism comprising clamping means for holding an optical information recording medium having no hub on the support surface of the turntable by press-contact with a magnetic attraction between the magnetic material of the clamper and the magnetic material concentric with the center shaft ; Optical information recording medium
Means for detecting the presence or absence of a hub.
Information recording medium without hub
To the turntable support surface.
And said alignment means includes a cylindrical member having a slidable conical centering outer peripheral surface in the vertical direction along the tubular portion provided on the center shaft side on the upper surface of the turntable, the tube An optical information recording / reproducing apparatus, comprising: an elastic member for urging the shape member upward.