JP2000030262A - Optical recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical recording/reproducing device, capable of suitably arranging plural optical pickups within the range of a cartridge opening part and making characteristics hardly affected by a difference between track inner/ outer peripheral positions. SOLUTION: This optical pickup 4 is joined to a drive unit 13 with a connection pin and a groove 17, and the optical pickup 4 is moved in the radial direction of a recording medium interlocked with the movement of the drive unit 13, and plural optical pickups 4 are arranged suitably within the range of the opening part, and massive data are recorded/reproduced rapidly by plural pickups 4, and a track tangential direction does not fluctuate, even when the optical pickups 4 exist on any radial directional positions of the recording medium, and errors in a track error signal is suppressed, and superior position control is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording / reproducing apparatus using a recording medium housed in a cartridge, and more particularly to an optical recording / reproducing apparatus configured to record / reproduce data using a plurality of optical pickups. It concerns the device.

[0002]

2. Description of the Related Art A conventional optical recording / reproducing apparatus records and reproduces data on a recording medium using one optical pickup. However, the data transfer speed is slower than that of a magnetic disk device, and it takes much time to record and reproduce a large amount of data. Therefore, a method of speeding up data recording and reproduction using a plurality of optical pickups has been attempted. Generally, a rewritable optical disk such as a magneto-optical disk or a phase-change optical disk used for an optical recording / reproducing apparatus is housed in a cartridge so that the surface is not damaged so that data cannot be recorded / reproduced, and is opened at the time of recording / reproduction. Although the optical pickup is configured to be accessible from the opening, the opening is basically supposed to have only one optical pickup arranged therein. It has conventionally been a problem whether to arrange an optical pickup.

Conventionally, an optical recording / reproducing apparatus in which a plurality of optical pickups are arranged in a cartridge opening of an optical disk to record and reproduce data at high speed is disclosed in, for example, Japanese Patent Laid-Open No. 4-1.
There is one disclosed in Japanese Patent Publication No. 13537, which is shown in FIG. 7 and FIG. FIG. 7 is a plan view of a conventional optical recording / reproducing apparatus, and FIG. 8 is a longitudinal sectional view of the conventional optical recording / reproducing apparatus.

[0004] The conventional optical recording / reproducing apparatus shown in the above-mentioned figures is
A plurality of optical pickups 101a and 101b, each of which can independently access one optical disk 2 housed in a cartridge 1 having an opening 1a, and the optical pickups 101a and 101b traverse tracks of the optical disk 2. Guide means 102 for independently and movably supporting each other in the directions, and optical pickups 101a,
01b along the guide means 102.

The guide means 102 comprises a pair of side rails 104 arranged in parallel, and a pair of side rails 10.
4 and a center rail 105 arranged side by side between the side rail 104 and the center rail 105.
The optical pickups 101a and 101b are disposed movably in the longitudinal direction of the rail. That is, by sharing the center rail 105 with the optical pickups 101a and 101b, the dimension in the track tangential direction can be reduced, and the plurality of optical pickups 101a and 101b can be arranged within the standardized opening 1a of the cartridge 1. It is like that.

The optical pickups 101a and 101b
Is configured to include objective lenses 106a and 106b for irradiating the recording surface of the optical disc 2 with laser light, and the objective lenses 106a and 106b are moved by moving the guide means 102.
106b can cover a range including the innermost edge information to the outermost edge information of the optical disk 2.

[0007]

In the above-mentioned conventional optical recording / reproducing apparatus, a part (center rail 105) of the guide means 102 is shared, but the effect is that the dimension in the track tangential direction in the shared part is reduced. Since only a slight reduction is achieved, the portion not shared by the guide means (side rail 104) still occupies a predetermined space.
Has a problem that it is very difficult to locate the opening within the range of the opening 1a.

The conventional optical recording / reproducing apparatus has two optical pickups 101a and 101b.
When the respective optical pickups 101a and 101b are located on the inner circumference side of the optical disc 2 and on the outer circumference side,
There is a problem that the track tangent directions at the positions of the objective lenses 106a and 106b are different, and the tracking error signal fluctuates.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a plurality of optical pickups can be appropriately arranged within a range of a cartridge opening. An object of the present invention is to provide an optical recording / reproducing apparatus which is made difficult.

[0010]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention has at least a light-collecting portion for collecting light on a disk-shaped recording medium housed in a cartridge having an opening, A plurality of optical pickups disposed in the opening range of the opening and at least in a range from an outermost peripheral portion to an innermost peripheral portion of a recording area of the recording medium in a radial direction of the recording medium; A plurality of drive units movably arranged in a predetermined direction across the information track of the medium; a plurality of drive means for moving the drive unit in the predetermined direction; and Interlocking means that is not movable in the predetermined direction and is movably connected in a direction other than the predetermined direction, and the light is linked to the movement of the drive unit in the predetermined direction. Kkuappu is what was configured to move in a radial direction of said recording medium.

Thus, the plurality of optical pickups can be appropriately arranged within the range of the opening of the cartridge.
A large amount of data can be recorded / reproduced on a recording medium with a plurality of optical pickups at a high speed, and the characteristics of the optical pickups are not affected by the difference in the positions of the inner circumference and the outer circumference of the optical disk. Characteristics can be obtained.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention has at least a light condensing portion for condensing light on a disk-shaped recording medium housed in a cartridge having an opening, and A plurality of optical pickups disposed in the opening range of the opening and at least in a range from the outermost peripheral portion to the innermost peripheral portion of the recording area of the recording medium so as to be movable in the radial direction of the recording medium; A plurality of drive units movably arranged in a predetermined direction across the information track, a plurality of drive means for moving the drive unit in the predetermined direction, and the optical pickup in the predetermined direction with respect to the drive unit. And an interlocking means for connecting the optical unit so as to be immovable and movable in a direction other than the predetermined direction, and interlocking with the movement of the drive unit in the predetermined direction. Moving the optical pickup in the radial direction of the recording medium by interlocking means to move the optical pickup in the radial direction of the recording medium in conjunction with the movement of the drive unit. The drive units can be arranged in positions that do not hinder the arrangement of the optical pickups by making the moving directions of the drive units different from each other. Even when the drive units do not fit within the cartridge opening area of the recording medium, a plurality of drive units can be arranged. The optical pickup can be appropriately arranged within the opening range, enabling high-speed recording and reproduction of a large amount of data by a plurality of optical pickups, and regardless of whether the optical pickup is at any radial position with respect to the recording medium. The track tangential direction does not fluctuate, and has the effect of suppressing errors in the track error signal and enabling excellent position control. .

According to a second aspect of the present invention, at least a light condensing portion for condensing light on a disk-shaped recording medium housed in a cartridge having an opening is provided. A plurality of optical pickups arranged to be movable in the radial direction of the recording medium at least in a range from an outermost peripheral portion to an innermost peripheral portion of a recording area of the recording medium;
The optical pickup is integrally mounted, and comprises a plurality of drive units movably disposed in parallel with the radial direction of the recording medium, and a plurality of drive means for moving the drive unit in the radial direction, An optical pickup, wherein an optical pickup of a plurality of optical pickups located closer to the outside of the opening range of the opening is attached to the drive unit such that the mounting position is closer to the center of the opening range of the opening. A recording / reproducing apparatus, wherein an optical pickup that moves integrally with the drive unit is attached to the drive unit so as to be shifted so that the locus of movement just coincides with the radial direction of the recording medium, so that the drive unit can move the cartridge opening of the recording medium. Even if the optical pickup does not fit within the range, a plurality of optical pickups can be appropriately arranged within the opening area, and a plurality of optical pickups can be arranged. In addition to enabling high-speed recording and reproduction of a large amount of data by up-tracking, the track tangential direction does not fluctuate regardless of the radial position of the optical pickup with respect to the recording medium, suppressing errors in the track error signal. It has the effect of enabling excellent position control.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a plan view of an optical recording / reproducing apparatus according to Embodiment 1 of the present invention, FIG. 2 is a front view of a main part of the optical recording / reproducing apparatus of FIG. 1, and FIG. FIG. 4 is a side view of the apparatus, and FIG. 4 is an explanatory view of a configuration of a fixed optical unit of the optical recording / reproducing apparatus of FIG.

In FIG. 1, in the optical recording / reproducing apparatus according to the present embodiment, three optical pickups 4a, 4b, 4c
Are radially juxtaposed. An optical disk 2 used as a recording medium is housed in a cartridge 1,
It is protected from dirt and damage and is easy to carry. The cartridge 1 has an opening 1a. The optical pickups 4a, 4b, and 4c are provided with objective lenses 5a, 5b, and 5c for condensing laser light on the optical disk 2, and have a radius ranging from the innermost track to the outermost track of the optical disk 2. It moves in the direction. On the other hand, the optical disk 2 is driven to rotate by the spindle motor 3.

In FIG. 4, the fixed optical unit 11a
(11b, 11c) is a laser light source 7a (7b, 7c).
c), a hologram element 8a (8b, 8c), and an optical integrated element 6a (6b, 6b,
6c) and a collimator lens 10a (10b, 10c) that collimates laser light (divergent light) emitted from the optical integrated element 6a (6b, 6c).

In FIG. 3, the optical pickup 4a (4
b, 4c) are provided with reflection mirrors 12a (12b, 12c). The reflection mirror 12a (12b, 12c)
The laser light emitted from the fixed optical unit 11a (11b, 11c) is reflected to reflect the laser light to the objective lens 5a (5b, 5c).
c). Conversely, the light reflected by the optical disk 2 and passed through the objective lens 5a (5b, 5c) is reflected to the fixed optical unit 11a (11b, 11c).

As shown in FIGS. 1 and 2, the drive units 13a, 13b and 13c are provided with a pair of guide shafts 14b arranged in parallel with the radial direction of the optical disk within the opening 1a of the cartridge 1. , And two pairs of parallel guide shafts 14a and 14c arranged in parallel with each other. Of the guide shafts 14a, 14b, 14c, the position of the centrally located guide shaft 14b is determined by the guide shaft 1
4a, 14c, the left and right guide shafts 14a, 14c are moved toward the center, and the drive units 13a,
13c is close to the drive unit 13b side, and the installation space is reduced.

In FIG. 1 and FIG.
a and 4c are two pickup guide shafts 1 respectively.
It is movably supported by 5a and 15c. Grooves formed by connecting pins 16a, 16c projecting from the lower surfaces of these optical pickups 4a, 4c extending in the direction perpendicular to the moving direction of the drive units 13a, 13c on the upper surfaces of the drive units 13a, 13c. 17a and 17c are engaged with each other to form a connecting means. As shown in FIG. 2, the central optical pickup 4b is connected to the drive unit 13b.
Directly fixed to.

2 and 3, the driving units 13a, 13b and 13c have coils 18a, 18b, 1
8c, and center yokes 19a, 19b, 19c inserted into the coils 18a, 18b, 18c.
Back yokes 20a, 20b, 20c which are arranged integrally with the center yokes 19a, 19b, 19c and outside the coils 18a, 18b, 18c, and magnets 21a which are attached to the back yokes 20a, 20b, 20c; Together with 21b and 21c, a linear motor as driving means is constituted.

Next, the operation of the optical recording / reproducing apparatus according to the first embodiment based on the above configuration will be described. The laser beams emitted from the laser light sources 7a, 7b, 7c of the optical integrated devices 6a, 6b, 6c provided in the fixed optical units 11a, 11b, 11c are hologram elements 8a, 8b, 8
c, a side beam is generated into three beams, which are collimated by the collimator lenses 10a, 10b, and 10c, and are incident on the optical pickups 4a, 4b, and 4c. The laser light incident on the optical pickups 4a, 4b, 4c is bent by reflection mirrors 12a, 12b, 12c provided inside and is incident on the objective lenses 5a, 5b, 5c, and is collected near the recording surface of the optical disk 2. Be lighted.

The reflected light from the optical disk 2 which has been modulated according to the presence or absence of data is again transmitted to the objective lenses 5a, 5b and 5c.
And exits the optical pickups 4a, 4b, 4c via the reflection mirrors 12a, 12b, 12c, and enters the fixed optical units 11a, 11b, 11c. The reflected light incident on the fixed optical units 11a, 11b, 11c is
After being condensed by the collimator lenses 10a, 10b, and 10c, the light is deflected by the hologram elements 8a, 8b, and 8c, and enters the light receiving elements 9a, 9b, and 9c. This light receiving element 9a,
The shift amount of the light spot from the information track of the optical disk 2 in the direction perpendicular to the surface of the optical disk 2 and in the cross-track direction is detected from the change in the incident light incident on the optical disks 9b and 9c. At the same time, an information signal is detected.

In the lens position control, the optical pickups 4a and 4a
b, 4c, the objective lenses 5a, 5b, 5c are driven by focus driving means (not shown). In the track cross direction, the drive units 13a, 13
coils 18a, 18b, and 18c provided in b and 13c
By flowing a current in a predetermined direction, the center yokes 19a, 19b and 19c, the back yokes 20a and 20a,
0b, 20c and magnets 21a, 21b, 21c
The drive units 13a, 13b, 13c are driven by the guide shafts 14a, 14c
b, 14c.

The drive units 13a, 13b, 13c
Moves, the grooves 1 of the drive units 13a and 13c are moved.
The connecting pins 16a, 16c engaging with the driving units 13a, 17c are pushed.
The optical pickups 4a and 4c are guided by the pickup guide shafts 15a and 15c and move in the radial direction of the optical disk 2 while sliding along the grooves 17a and 17c of the optical disks 2a and 13c. Also, the central optical pickup 4b
Is directly fixed to the drive unit 13b, so that when a current flows through the coil 18b, the drive unit 13b moves in the radial direction of the optical disc 2 as it moves along the guide shaft 14b.

Thus, each of the optical pickups 4a, 4a
Since b and 4c can be moved in the radial direction of the optical disc 2, the characteristics of the optical pickups 4a, 4b and 4c are not affected by the difference in the positions of the optical disc 2 on the inner and outer sides. The opening 1 of the cartridge 1
A plurality of optical pickups 4a, 4b, 4c can be appropriately arranged in a, and a large amount of data can be recorded and reproduced at high speed.

(Embodiment 2) An optical recording / reproducing apparatus according to a second embodiment of the present invention will be described with reference to FIGS. 5 is a plan view of an optical recording / reproducing apparatus according to Embodiment 2 of the present invention, FIG. 6 is a front view of each optical pickup of FIG. 5, (a) is a left optical pickup, and (b) is a central light. (C) is a front view of the right optical pickup. In the description of the present embodiment, the same components as those of the optical recording / reproducing apparatus of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 5, in the optical recording / reproducing apparatus according to the present embodiment, drive units 23a, 23b, and 23c for moving three optical pickups 22a, 22b, and 22c radially juxtaposed, and respective In this configuration, guide shafts 24a, 24b, and 24c are disposed substantially radially with respect to the optical disc 2. As shown in FIGS. 5 and 6, the positions of the optical pickups 22a and 22c arranged in the drive units 23a and 23c closer to the outside of the opening 1a of the cartridge 1 are moved toward the center optical pickup 22b. Optical pickup 22a,
The optical pickup 22c is fixed to the drive units 23a and 23c in the same manner as the central optical pickup 22b.
The configuration is such that the trajectories of the movements a and 22c coincide with the radial direction of the optical disk 2.

According to the optical recording / reproducing apparatus of the present embodiment based on the above configuration, the outer optical pickup 22 of the three
The optical pickups 22a and 22c are disposed closer to the center optical pickup 22b, and the optical pickups 22a and 22c disposed closer to the outside of the opening 1a of the cartridge 1 can also be appropriately disposed within the opening 1a. At the same time, since the optical pickups 22a, 22b and 22c can be moved in the radial direction of the optical disk 2, a large amount of data can be recorded and reproduced at high speed by the plurality of optical pickups 22a, 22b and 22c appropriately arranged in the area of the opening 1a. In addition, the characteristics of the optical pickups 22a, 22b, and 22c are not affected by the difference in the positions of the optical disk 2 on the inner and outer sides.

[0029]

As described above, according to the present invention, the size of the optical pickup can be reduced by separating the optical pickup from the drive unit, and a plurality of optical pickups can be provided within the opening area of the cartridge containing the recording medium. Can be arranged appropriately, and an advantageous effect that high-speed recording and reproduction of a large amount of data using a plurality of optical pickups on a cartridge storage type recording medium can be obtained.

Further, since the plurality of optical pickups can move in the radial direction of the recording medium, the tangential direction of the track to the optical pickup does not change regardless of the position of the optical pickup relative to the recording medium. An advantageous effect is obtained in that the error of the error signal can be suppressed, and excellent control of the position of the objective lens becomes possible.

[Brief description of the drawings]

FIG. 1 is a plan view of an optical recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a front view of a main part of the optical recording / reproducing apparatus of FIG. 1;

FIG. 3 is a side view of the optical recording / reproducing apparatus of FIG. 1;

FIG. 4 is a configuration explanatory view of a fixed optical unit of FIG. 1;

FIG. 5 is a plan view of an optical recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 6 is a front view of each optical pickup of FIG. 5;

FIG. 7 is a plan view of a conventional optical recording / reproducing apparatus.

FIG. 8 is a longitudinal sectional view of a conventional optical recording / reproducing apparatus.

[Explanation of symbols]

Reference Signs List 1 cartridge 1a opening 2 optical disk 3 spindle motor 4a, 4b, 4c, 22a, 22b, 22c optical pickup 5a, 5b, 5c, 106a, 106b objective lens 6a, 6b, 6c optical integrated element 7a, 7b, 7c laser light source 8a , 8b, 8c Hologram element 9a, 9b, 9c Light receiving element 10a, 10b, 10c Collimator lens 11a, 11b, 11c Fixed optical unit 12a, 12b, 12c Reflection mirror 13a, 13b, 13c, 23a, 23b, 23c Drive unit 14a, 14b, 14c, 24a, 24b, 24c Guide shaft 15a, 15c Pickup guide shaft 16a, 16c Connection pin 17a, 17c Groove 18a, 18b, 18c Coil 19a, 19b, 19c Center yoke 20a, 20 b, 20c Back yoke 21a, 21b, 21c Magnet 101a, 101b Optical pickup 102 Guide means 103a, 103b Linear motor 104a, 104b Side rail 105 Center rail

Claims (2)

[Claims] 1. A light-receiving device comprising: a light-collecting portion for converging light onto a disk-shaped recording medium housed in a cartridge having an opening; A plurality of optical pickups movably disposed in a radial direction of the recording medium in a range from an outermost peripheral portion to an innermost peripheral portion of the recording medium; and movably disposed in a predetermined direction crossing an information track of the recording medium. A plurality of driving units, a plurality of driving means for moving the driving unit in the predetermined direction, and the optical pickup is not movable in the predetermined direction with respect to the driving unit, and is moved in a direction other than the predetermined direction. Interlocking means for movably connecting the optical pickup in the radial direction of the recording medium in conjunction with the movement of the drive unit in the predetermined direction. Optical recording and reproducing apparatus according to claim. 2. The recording medium according to claim 1, further comprising a light-collecting portion for condensing light onto a disk-shaped recording medium housed in a cartridge having an opening, wherein said light-collecting portion is in an opening range of said opening and at least a recording area of said recording medium. A plurality of optical pickups disposed movably in the radial direction of the recording medium in a range from the outermost peripheral portion to the innermost peripheral portion of the recording medium, and the optical pickups are integrally attached and are parallel to the radial direction of the recording medium. A plurality of drive units movably disposed in the optical pickup, and a plurality of drive means for moving the drive unit in the radial direction, wherein the plurality of optical pickups are located closer to the outside of an opening range of the opening. An optical recording / reproducing apparatus, wherein an optical pickup is attached to the drive unit such that an attachment position thereof is shifted toward a center of an opening area of the opening.