JPH05274687A - Optical disk device - Google Patents

Abstract

PURPOSE:To record and reproduce with high density and at high speed by suppressing the vibration of an optical head due to the vibration of an access member as much as possible and to displace the optical head individually in the state of separating it from an access mechanism. CONSTITUTION:The optical head 16B is supported by an individual supporting shaft 20 and the optical head 16B and the access member 30 moving the head are connected through a connecting means 31 by which the optical head 16B becomes an unconnected state in the direction of attaching/detaching to the surface of an optical disk 5. Further, by moving the supporting shaft 20 by a head displacing mechanism 23, the optical head 16B is displaced individually by being separated from the access mechanism 17B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device used for storing and reproducing information, and more particularly to an optical disk device for performing information processing by moving an optical head along the surface of an optical disk.

[0002]

2. Description of the Related Art Conventionally, in an apparatus of this type, the optical head itself does not have a dedicated supporting member, but is fixed to an access member of an access mechanism for moving the optical head via a screw or the like. It is composed.

Further, a linear motor having a coil provided on an access member which is a movable member, a permanent magnet which is fixedly provided, and a yoke which is a magnetic body is usually used as a driving means of the access mechanism. There is.

As described above, in the conventional optical disk device, since the optical head is fixed to the access member of the access means, the vibration of the access member directly affects the optical head. In particular, if the thrust is increased to drive the optical head at a higher speed in order to shorten the access time, the linear motor itself needs to have a certain size in proportion to this, and as a result, the weight of the linear motor is reduced. Since the ratio of the vibration to the whole becomes large, the generation of vibration also becomes large, and this vibration is directly transmitted to the optical head, which is an obstacle to realizing high-density recording and reproduction.

Further, there is provided a double-sided access type optical disk device in which an optical disk cartridge having windows on both sides for information processing is received and processed, and an optical head is arranged for each side in order to correspond to both sides of the optical disk. In this case, it is necessary to displace at least one of the optical heads in the direction of approaching and separating from the surface of the optical disc when the optical disc cartridge is inserted and removed (at the time of loading).

Further, in the 300 mm (12 inch) double-sided optical disk device which is currently under the standards of ISO and JIS, the thickness of the optical disk base is not standardized among the manufacturers, so the base depends on the optical disk used. In order to adjust and correct the thickness, it is necessary to displace the optical head in the direction of approaching and separating from the surface of the optical disc. However, the conventional apparatus has a problem that not only the optical head but also the heavy access mechanism has to be displaced, the displacement mechanism becomes large and a drive source with a large output is required.

[0007]

As described above, in the conventional optical disk device, since the optical head is fixed to the access member of the access means, the vibration of the access member directly affects the optical head. Therefore, there is a problem that it becomes an obstacle in realizing high-density recording / reproducing at high speed.

In addition to displacing not only the optical head but also the heavy access mechanism, a large displacement mechanism using a driving source with a large output and having increased rigidity is required. There were problems such as high cost, high cost, and high power consumption.

The present invention has been made under the above circumstances. A first object of the present invention is to move the optical head by connecting the optical head and the access member and moving the access member. Provided is an optical disk device capable of suppressing the vibration of an optical head due to the vibration of an access member as much as possible and enabling high-density recording and reproduction.

A second object is to displace the optical head so as to be inserted into and removed from the window portion of the optical disk cartridge at the time of loading the optical disk cartridge, and to adjust and correct the base thickness of the optical disk. An object of the present invention is to provide an optical disk device which displaces a head in a direction of approaching and separating from the surface of an optical disk and which can be displaced by an optical head independently of the access mechanism.

[0011]

As a means for achieving the above-mentioned first object, the present invention provides an optical disk device for performing information processing by moving an optical head along the surface of an optical disk, The head supporting member that slidably supports the optical head to move along the surface of the optical disk, and the connecting means that is not connected in the direction in which the optical head comes in contact with and separates from the surface of the optical disk. The optical head has an access member connected to the optical head, and an access unit for moving the optical head by moving the access member.

Further, as means for achieving the above second object, an optical disk cartridge having windows on both sides for information processing is received and processed, and an optical disk is provided for each side in order to deal with both sides of the optical disk. An optical disk device with a head arranged for double-sided access,
The head supporting member that slidably supports the optical head to move along the surface of the optical disk, and the connecting means that is not connected in the direction in which the optical head comes in contact with and separates from the surface of the optical disk. An access unit having an access member connected to the optical head, and moving the access member to move the optical head; and moving the head supporting unit in a direction to move toward and away from the surface of the optical disk. The optical head comprises a head displacing means for inserting / removing the optical head into / from the window portion of the optical disk cartridge.

[0013]

According to the optical disk device of the present invention, when the access member moves, the optical heads connected through the connecting means and supported by the independent supporting means move integrally. Since the non-connected state is in the direction of approaching and separating from the surface of the optical disc, even if the access member vibrates in the direction of approaching and separating from the surface of the optical disc, the vibration is not transmitted to the optical head. Therefore, the vibration of the optical head due to the vibration of the access member can be suppressed as much as possible, and high-density recording and reproduction can be performed at high speed.

Further, by moving the head supporting means in the direction of approaching and separating from the surface of the optical disk, the optical head can be displaced independently of the access mechanism, which is a heavy object, so that the optical disk cartridge can be displaced. -During the displacement, the optical head is displaced so as to be inserted into and removed from the window portion of the optical disc cartridge, and the optical head is displaced toward and away from the surface of the optical disc in order to adjust and correct the substrate thickness of the optical disc. Is possible.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is an oblique view from above of the shutter 2 of the optical disk cartridge 1 used in the present invention. The optical disk cartridge 1 is a cartridge body 4 having access windows 3A and 3B for recording / reproducing on both sides thereof, and a 300 mm (12 inch) optical disk 5 accommodated therein. ，
3B is configured to be opened and closed by a shutter 2 that is a double-sided integrated type. The arrow X in the figure indicates an optical disk cartridge 1
3 shows the insertion direction of the optical disc device 6 into the optical disc device 6 described later. Next, with reference to FIG. 3, a description will be given of a double-sided access type optical disc device 6 using the optical disc cartridge 1.

Reference numeral 10 in the drawing denotes an apparatus main body having an insertion / removal opening 11 for inserting / removing the optical disk cartridge 1 on the front surface. A spindle motor as a disk drive means is provided at a substantially central portion in the apparatus main body 10. -The data 12 is provided.
The spindle motor 12 includes a turntable 13 having magnetic force generating means for magnetically attracting and holding a metallic hub portion 5A provided at the center of rotation of the optical disc 5 and a positioning portion for the optical disc 5, It comprises a motor 14 for driving the turntable 13.

The optical disk cartridge 1 inserted from the insertion / removal opening 11 is inserted into the main body 10 of the apparatus, and the optical disk 5 is loaded into the turntable 1 of the spindle motor 12.
3, a loading mechanism 15 having a shutter opening / closing mechanism for opening / closing the shutter 2 while the optical disk cartridge 1 is being ejected to the insertion / ejection opening 11 while being conveyed is built-in. Since the loading mechanism 15 itself has a known structure, its explanation is omitted.

Further, in the main body 10 of the apparatus, a lower optical optical head 16A as a first optical head which is close to the lower surface of the optical disk 5 through the access window 3A of the optical disk cartridge 1 is provided. Further, an upper optical optical head 16B as a second optical head is arranged in proximity to the upper surface of the optical disc 5 via the window 3B.

These optical heads 16A, 16B are respectively access mechanisms 17A, 17 as access means.
B is movable in the radial direction of the optical disk 5 (direction of arrow a), and the upper optical head 16B is separated from the access mechanism 17B as will be described later, and independently contacts and separates from the surface of the optical disk 5. Can be displaced in the vertical direction (arrow b direction).

That is, as shown in FIG. 1, the upper optical head 16B is slidably supported by two parallel support shafts 20, 20 as head supporting members. Both ends of the support shafts 20 and 20 are fixed to a pair of movable frames 22 and 22 (only one of which is shown) arranged so as to be vertically movable by a plurality of guide rollers 21. The movable frames 22 and 22 are vertically moved by a head displacement mechanism 23 as a head displacement means. That is, the movable frame 22
Racks 24, 24 are attached to the rack 24, 24, and the driving force of a motor 25 fixed to the apparatus main body 10 is transmitted to the racks 24, 24 via a reduction mechanism 26. The pinions 27, 27 driven by are engaged with each other. Then, the optical head 16B is supported by the forward and reverse rotations of the motor 25 to support the shafts 20, 2
It moves vertically with 0.

The access mechanism 17B for moving the optical head 16B is composed of a linear motor having two access members 30, 30 in order to enable high speed driving. The optical head 16B and the access member 30 are provided. , 30
Are connected via connecting means 31, 31 described later. The access members 30 and 30 are provided with moving coils 32 that form a linear motor with a permanent magnet (not shown) fixedly provided and a yoke that is a magnetic body.

The access members 30 and 30 are slidably supported by two parallel support shafts 36 and 36, both ends of which are held by fixed frames 35 and 35 (only one of which is shown).

The connecting means 31 is the optical head 1.
In the direction in which 6B comes in contact with and separates from the surface of the optical disk 5, it is in a non-connected state. That is, as shown in FIG. 4, a connecting shaft 40 as an engaging member is provided on the lower surface side of the access member 30 in a state where the axis is vertical.
The connecting shaft 40 is engaged with an arcuate groove 41 as an engaged portion formed on the side surface of the optical head 16B. Next, a description will be given of how the optical disk cartridge 1 having the above-described configuration is inserted into the optical disk device 6 that is compatible with double-sided access, and recording and reproduction can be performed. First,
The optical disk cartridge 1 is inserted into the insertion / removal opening 11 of the optical disk device in the direction of the arrow X, with the side having the shutter 2 as the head.

The optical disk cartridge 1 inserted into the insertion / removal opening 11 is horizontally taken up to a predetermined position by the loading mechanism 15. At this time, the shutter 2 which is normally closed by the biasing force of the spring is opened by the shutter opening / closing mechanism (not shown).

At this time, the lower optical head 16A is in a state of facing and not interfering with the access window portion 3A of the optical disc cartridge 1, and the upper optical head 16B does not interfere with the optical disc cartridge 1. Since the optical disc cartridge 1 is retracted to the upper position, the optical disc cartridge 1 can be horizontally rotated.

Then, when it is taken up to a predetermined position, the
The optical disk cartridge 1 is lowered by the binding mechanism 15 and the optical disk 5 is set on the turntable 13 of the spindle motor 12.

In this way, when the optical disc 5 is set on the turntable 13 of the spindle motor 12, for example, a hole (not shown) provided in the cartridge body 4 of the optical disc cartridge 1 as surface information (not shown). Small hole)
Is checked by an optical sensor, or the surface information recorded on the optical disk 5 is read and confirmed by the lower optical head 7A, and the spindle motor 12 is controlled to determine the rotation direction of the optical disk 5. Also, the optical disc 5
Check the substrate thickness.

After the loading operation is completed, the motor 25 of the head displacement mechanism 23 is operated and the optical head 1 is retracted.
6B descends and intervenes in the access window 3B, and returns to a position close to the upper surface of the optical disk 5. At this time, adjustment and correction are performed according to the substrate thickness of the optical disk 5.
On the other hand, the connecting shafts 40, 40 forming the connecting means 31, 31
Are engaged with the arcuate grooves 41, 41 to access members 30, 30
And the optical head 16B are connected.

Then, while the optical disk 5 is rotated in a predetermined direction based on the surface information, the lower optical head 16A and the upper optical head 16B are moved in the radial direction to record / reproduce information on / from both surfaces of the optical disk 5. Will do the work.

When the optical head 16B moves,
The vertical vibrations of the access members 30, 30 connected thereto are not transmitted to the optical head 16B because the connecting shaft 40 constituting the connecting means 31, 31 is movable in the arcuate groove 41. .. Therefore, high density and high speed recording / reproducing becomes possible.

When the recording / reproducing operation of the information by the optical disk 5 is completed, first, the motor 25 of the head displacement mechanism 23 rotates in the reverse direction so that the upper optical head 16B is retracted to the upper position where it does not interfere with the optical disk cartridge 1. Becomes At this time, the optical head 16B can be separated from the access members 30, 30 of the access mechanism 17B and displaced by the optical head 16B alone. After that, the optical disc cartridge 1 is horizontally conveyed in the direction of the insertion / removal opening 11 by the loading mechanism 15 and ejected to the outside of the optical disc device 6.

In the above-described embodiment, only the upper optical head 16B is set in a non-connection state with the access member 30 of the access mechanism 17B in the direction of approaching and separating from the surface of the optical disk 5. However, it may be applied to the lower optical head 16A.

Further, the optical head 16B and the access member 3
The connecting means 31 for connecting 0 to each other is composed of the connecting shaft 40 and the arcuate groove 41 as the engaged portion, but the present invention is not limited to this and may have another structure.
Any structure may be used as long as it is in a non-connected state in the direction in which it comes into contact with or separates from the surface. The present invention is not limited to the above-described embodiments, and can be variously modified without departing from the scope of the invention.

[0035]

As described above, the present invention has the following effects.

According to the optical disk device of the first aspect,
When the access member moves, it is connected through the connecting means,
And the optical head supported by the independent supporting means moves integrally, but since the connecting means becomes a non-connecting state in the direction in which the optical head comes in contact with and separates from the surface of the optical disk,
Even if the access member vibrates in the direction toward and away from the surface of the optical disc, the vibration is not transmitted to the optical head. Therefore, the vibration of the optical head due to the vibration of the access member can be suppressed as much as possible, and high-density recording and reproduction can be performed at high speed.

According to the optical disk device of the second aspect, in addition to the effect of the first aspect, the head supporting means is moved in the direction of coming into contact with and separating from the surface of the optical disc, so that the heavy object is loaded. The optical head can be displaced separately from the access mechanism, and the optical head can be displaced so as to be inserted into and removed from the window portion of the optical disc cartridge at the time of loading the optical disc cartridge, or adjustment for the substrate thickness of the optical disc. In addition, the optical head can be displaced in the direction of approaching and separating from the surface of the optical disk for correction.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a perspective view of the optical disc cartridge used in the optical disc apparatus according to the embodiment of the present invention, in which the shutter is opened as seen obliquely from above.

FIG. 3 is a side sectional view schematically showing a state in which an optical disc cartridge is inserted into the optical disc device according to the embodiment of the present invention.

FIG. 4 is a perspective view showing the structure of a connecting means for connecting the optical head and the access member in the embodiment.

[Explanation of symbols]

1 ... Optical disk cartridge, 2 ... Shutter, 3A, 3
B ... Window portion, 4 ... Cartridge body, 4A ... Front end frame portion, 5
Optical disk, 6 ... Optical disk device compatible with double-sided access, 10 ... Device body, 11 ... Insert / eject port, 12 ... Spindle motor (disk drive means), 15 ... Loading mechanism, 16A ... Lower optical head (first) 1 optical head),
16B ... Upper optical head (second optical head), 17
A ... Lower access mechanism (access means), 17B ... Upper access mechanism, 20 ... Support shaft (head support member), 21 ... Guide roller, 22 ... Movable frame, 23
... head displacement mechanism (head displacement means), 25 ... motor,
26 ... Reduction mechanism, 30 ... Access member, 31 ... Connection means, 36 ... Support shaft, 40 ... Connection shaft (engaging member),
41 ... Arc-shaped groove (engaged portion).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiki Maeda Toshiba Intelligent Technology Co., Ltd. 70 Yanagimachi, Sachi-ku, Kawasaki-shi, Kanagawa

Claims (2)

[Claims] 1. An optical disk device for performing information processing by moving an optical head along the surface of an optical disk, the head supporting member supporting slidably for moving the optical head along the surface of the optical disk. And an optical head that has an access member connected to the optical head via a connecting means that is in a non-connected state in a direction in which the optical head comes into contact with and separates from the surface of the optical disk, and moves the access member. And an access unit for moving the optical disc. 2. An optical disk device compatible with double-sided access, which receives and processes an optical disk cartridge having windows on both sides for performing information processing, and has an optical head for each side to accommodate both sides of the optical disk. And a head support member that slidably supports the optical head to move along the surface of the optical disc, and a connecting means that is in an unconnected state in a direction in which the optical head comes in contact with and separates from the surface of the optical disc. An access means for moving the optical head by moving the access member and an access member connected to the optical head through the head, and the head supporting means for moving the head supporting means in a direction of contacting and separating from the surface of the optical disk. Head displacing means for inserting / removing the optical head into / from the window of the optical disc cartridge An optical disk device comprising: