JPS63249992A - Information processor - Google Patents

Abstract

PURPOSE:To prevent a bad influence of dust upon information recording or reproducing by pressing a cleaning means to an information storage medium with a pressing means to remove dust stuck to the information storage medium in accordance with rotation of this medium. CONSTITUTION:In case of removal of dust stuck to an optical disk 1, a current is allowed to flow to a solenoid 25 to attract a mobile iron core 26 against the energizing force of a compression spring 29 and springs 27 and 31. A lever 22 is pulled through the spring 27 and is turned clockwise, and a cleaner 21 attached to the front end part of the lever 22 is brought into contact with the lower face of the optical disk 1 with its top face parallel with this lower face. When the optical disk 1 is rotated by a spindle motor 11, dust stuck to the lower face of the optical disk 1 is wiped off by the cleaner 21. Thus, information is accurately recorded or reproduced without being affected by dust stuck to the surface of the optical disk 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an information processing apparatus, for example, an information processing apparatus that optically records or reproduces information on an optical disc.

(Prior Art) In recent years, optical disk devices have been developed as information processing devices that optically store large volumes of document data and image information on optical disks as information storage media, or reproduce information from optical disks. .

The optical disc used in the optical disc device records information by forming bits on the information storage layer by irradiation with a light beam. Furthermore, information is reproduced by irradiating the information storage layer with a light beam and detecting the reflected light. However, in such optical discs, if a large amount of dust or the like adheres to the surface of the substrate, or if the surface of the substrate is touched directly with dirt, it may adversely affect the recording or reproduction of information. .

To prevent this, current optical discs are generally housed in cassettes.

However, when such optical discs are used for many years, dust enters through the gaps in the cassette and adheres to the surface of the substrate.

Furthermore, if an optical disk with a large amount of dust attached is inserted into an optical disk device and used, this large amount of dust will have a negative effect on the light beam irradiated for recording or reproducing information, resulting in accurate recording or reproduction of information. This had the problem that playback could no longer be performed.

(Problems to be Solved by the Invention) As described above, conventional information processing devices have the problem that information recording or reproduction becomes inaccurate due to dust attached to the information storage medium. there were.

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide an information processing apparatus equipped with a mechanism for removing dust attached to an information storage medium.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an information processing device that reproduces information recorded on a rotatable information storage medium. , comprising a cleaning means for removing dust attached to the surface of the information storage medium, and a pressure contact means for bringing the cleaning means into pressure contact with the information storage medium,
The cleaning means is brought into pressure contact with the information storage medium by the pressure contact means, and the dust attached to the surface of the information storage medium is removed as the information storage medium is rotated.

(Function) A cleaning member is brought into pressure contact with the information storage medium by a pressure contact means,
and rotating this information storage medium.

Along with this rotation, dust adhering to the information storage medium is removed by the cleaning member, so that recording or reproduction of information is not adversely affected by the dust.

(Example) The present invention will be explained below based on the drawings.

1 to 3 are diagrams showing an embodiment of an information processing apparatus according to the present invention.

In FIG. 1, an optical disc 1 as an information storage medium has a substrate and an information storage layer. Bits with a diameter of about 0.8 μm are formed on this information storage layer to record information, and the substrate is reinforced. It is formed from a glass layer. Further, the size of the optical disc 1 is, for example, 306 mm in terms of outer diameter.
mm, inner diameter 35mm.

The thickness is 1 to 8 ml1. The optical disc 1 is housed in a substantially square, thin box-shaped cassette 2 in order to prevent dust from adhering to the surface of the substrate. The cassette 2 is divided from the center into a first accommodating part 3 and a second accommodating part 4, and when this cassette 2 is inserted into the information processing device 5, the first accommodating part 3 and the second accommodating part 4 are divided into two parts. The portion 3 and the second accommodating portion 4 are opened, the optical disc 1 is exposed, and the exposed optical disc 1 can be irradiated with laser light. Further, the cassette 2 is usually provided with a locking mechanism (not shown) to lock the first accommodating part 3 and the second accommodating part 4 from opening to prevent dust from adhering to the cassette 2. First accommodating part 3 and second accommodating part 4
is made of a plastic material or the like, and a label is attached to the rear end of the first accommodating portion 3 to indicate the information content of the optical disc 1 and the direction of the surface of the optical disc 1.

In addition, the outer dimensions of the cassette 2 in the closed state are such that the length in the insertion direction is larger than the length in the direction perpendicular to the cassette 2, which prevents the cassette 2 from being inserted into the information processing device 5 in the wrong direction. It is prevented.

On the other hand, an insertion lower for inserting a cassette 2 containing an optical disk 1 is provided on the front surface of a housing 6 of an optical disk device 5, which is an information processing device that records or reproduces information on an optical disk. As shown in FIG. 2, a shutter 8 is attached to the insertion lower, and the insertion lower is closed by the shutter 8 to prevent dust from entering the apparatus except when the cassette 2 is inserted or ejected. In addition, an insertion detection sensor 3 that detects insertion
7 is provided. Inside the housing 6, a plurality of upper and lower rollers 9a and 9b are arranged in order from the front to the rear for transporting the cassette 2 inserted into the insertion lower. When the cassette 2 is inserted or ejected, the rollers 9a and 9b are moved by a feeder mechanism (not shown) to the position shown by the imaginary line. When cassette 2 is inserted into the insertion lower, the loading mechanism (not shown)
The rollers 9a and 9b are rotationally driven by a motor (not shown), and the cassette 2 is conveyed inside by the rollers 9a and 9b. When the cassette 2 is transported inside, the locking mechanism is released, the first accommodating part 3 and the second accommodating part 4 are opened, and the optical disc 1 accommodated in the cassette 2 is placed in the center. part is exposed. The exposed optical disc 1 is placed on the turntable 10 by a loading mechanism. Further, a cap 12 is disposed on the turntable 10, and this cap 12 is operated by a motor of a loading mechanism.

By means of a clamping mechanism (not shown), the turntable 1
The optical disc 1 placed on the turntable 10 is held between the cap 12 and the turntable 10. This turntable 10 is rotated by a spindle motor 11, whereby the optical disc 1 is rotated at a constant speed.

The cassette 2 is supported by a post 14 erected on the base 13, so the optical disc 1 does not come into contact with the inner wall of the cassette 2. The spindle motor 11 is mounted on a base 13 via a motor mounting frame 15, and the base 13 is mounted on the bottom surface of the housing 6 via vibration-proof legs 16 having rubber.

On the other hand, as shown in FIG. 3, the lower surface side of the optical disc 1 placed on the turntable 10 is located on one side (upper side in FIG. 3) of the turntable 10 when viewed from the insertion direction of the cassette 2. is an optical head 1 for recording or reproducing information by irradiating an optical disc 1 with a laser beam;
7 are arranged. The optical head 17 is provided on the base 13 and is fixed to a slider 18 that is slidably attached to a pair of parallel shafts 19 extending in the radial direction of the optical disc 1 . Further, a linear motor 20 is attached to the base 13, and the optical head 17 reciprocates along one shaft by driving this linear motor 20.

Also, the optical disc 1 placed on the turntable 10
A cleaner 21 as a cleaning means for removing dust attached to the optical disc 1 is disposed on the lower surface side and on the other side of the turntable 10 when viewed from the insertion direction of the cassette 2 (lower side in FIG. 3). It is set up. cleaner 21
is a roughly square prism-shaped sponge covered with felt.
The length of this cleaner 21 is the same as the width of the information storage layer of the optical disc 1. Further, as shown in FIG.
The top surface of the cleaner 21 is arranged parallel to the bottom surface of the optical disc 1 so that it can come into contact with it. The base end 22b of the lever 22 is rotatably supported by a bearing 24 via a shaft 23, and the bearing 24 is fixed to the base 13 with a screw.

Accordingly, the lever 22 rotates in the left half in FIG.

A tolenoid 25 is provided on the base 13 in a direction perpendicular to the radial direction of the optical disc 1 and on the opposite side to the rotating side of the cleaner 21. The solenoid 25 has a movable core 26, and the base end 2 of the lever 22 is connected to the movable core 26.
2. A spring 27 is tensioned between the cleaner 21 and the optical disc 1, and the tensile force of the spring 27 maintains the state in which the cleaner 21 is in contact with the optical disc 1 when the cleaner 21 comes into contact with the optical disc 1. A pin 28 is provided at the tip of the movable iron core 26, and a compression spring 29 is compressed between the pin 28 and the solenoid 25, so that the movable iron core 26 is constantly moved toward the base end 22b via the pin 28. energized.

A locking portion 30 is provided on the base 13 on the rotating side of the cleaner 21, and a spring 31 is tensioned between the locking portion 30 and the base end portion 22b. , the lever 22 is always pulled to the position shown by the imaginary line in FIG. Also, this spring 3
1 prevents the cleaner 21 from suddenly coming into contact with the optical disc 1 by its tensile force.

When a current is applied to the solenoid 25, the movable core 26 is drawn toward the right in FIG. 2 against the biasing forces of the compression spring 29 and the springs 27, 31. When the movable iron core 26 is attracted, the lever 22 is pulled by the spring 27 and rotates clockwise from the position of the imaginary line, and the cleaner 21 comes into contact with the optical disc 1. Lever 22° Solenoid 25. The spring 27 is a pressure contact means 36
It consists of

Next, the operation of the optical disc 1, optical disc device 5, etc. having the above configuration will be explained.

When a cassette 2 containing an optical disk is inserted into the optical disk device 5 from the insertion lower, the feeder mechanism carries the cassette 2 inside and takes it into the interior.At the same time, the locking mechanism of the cassette 2 is released and the first storage section 3 and the second cassette 2 are separated from each other. The accommodating portion 4 of the optical disc 1 is opened, and the central portion of the optical disc 1 is exposed.

The optical disc 1 with the central portion exposed is placed on the turntable 10 by the loading mechanism, the cap 12 is moved and pressed onto the turn table 10 by the clamp mechanism, and the optical disc 1 is clamped between the turntable 1d and the cap 12. .

By the way, when the cassette 2 containing the optical disc 1 is used for many years, dust enters through the gaps in the cassette 2 and adheres to the surface of the substrate of the optical disc 1. This adhesion of dust may adversely affect the recording or reproduction of information on the optical disc 1.

Therefore, it becomes necessary to remove dust attached to the optical disc 1. In this optical disk device 5, in order to remove dust attached to the optical disk 1, first, in response to an external instruction, a current is applied to the solenoid 25, and the two compression springs and the springs 27 and 31 are The movable iron core 26 is attracted against the force. When the movable iron core 26 is attracted, the lever 22 located at the imaginary line is pulled by the spring 27 and rotates clockwise in FIG. 2. When the lever 22 rotates, this lever 22
A cleaner 21 attached to the tip of the optical disc 1 comes into contact with the lower surface of the optical disc 1 with its top surface parallel to the lower surface of the optical disc 1. At this point, the cleaner 21 is arranged so that its length direction is the same as the radial direction of the optical disc 1, and the length of the cleaner 21 is the same as the width of the information storage layer of the optical disc 1.

Next, the turntable 1 is driven by the spindle motor 11.
0 to rotate the optical disc 1 relative to the cleaner 21. At this time, since the cleaner 21 is in contact with the lower surface of the optical disk 1, the optical disk 1 slides against the cleaner 21, and the dust attached to the lower surface of the optical disk 1 is wiped off by the cleaner 21. At this time, since the length of the cleaner 21 spans the entire width of the information storage layer of the optical disc 1, all dust that may affect the information storage layer of the optical disc 1 is wiped away by the cleaner 21. Therefore, the laser beam irradiated from the optical head 17 is not affected by dust attached to the surface of the optical disc 1, and information can be recorded or reproduced accurately.

By the way, when the cleaner 21 comes into contact with the optical disc 1, since the lever 22 is pulled counterclockwise by the spring 31, it does not come into sudden contact with the lower surface of the optical disc 1, but only gently. Therefore, no scratches or the like occur on the optical disc 1 due to contact with the cleaner 21. In this way, when all the dust that would affect the information storage layer of the optical disc 1 is wiped off by the cleaner 21, the current flowing through the solenoid 25 is cut off.

As a result, the movable core 26 is pushed out to the left in FIG. 2 by the urging force of the compression spring 29, and the lever 22 is rotated counterclockwise in FIG. 2 by the tensile force of the spring 31. At the same time as the lever 22 rotates, the cleaner 21 separates from the lower surface of the optical disc 1 and is returned to the position not shown by the two-dot chain line.

With the cleaner 21 held in this position, the optical disc 1 is rotated by the spindle motor 11, and a laser beam is irradiated from the optical head 17 toward the rotating optical disc 1 to record or reproduce information. Therefore, during recording or reproduction, the cleaner 21 is not in contact with the optical disc 1, so that the optical disc 1 is not worn out by the sliding contact of the cleaner 21.

On the other hand, if the optical disk device 5 does not have a mechanism for removing dust as described above, the cassette 2 containing the optical disk 1 may be disassembled and the dust attached to the optical disk 1 may be removed using a record cleaner or the like. You'll have to wipe it off.

However, in this invention, when the cassette 2 is inserted into the optical disk device 5, the dust attached to the optical disk 1 is wiped off by the cleaner 21 as described above without disassembling the cassette 2. can be easily removed.

Note that the cassette is placed between the first storage section 3 and the second storage section 4.
If the optical disc device 1 is of a type in which the optical disc 1 is completely exposed by opening it wide, the optical disc device 1 may have a structure in which the cleaner 21 rotates and slides with respect to the optical disc 1.

Further, the cassette 2 in which the optical disc 1 is stored is of a type in which the first accommodating part 3 and the second accommodating part 4 are opened to expose the central part of the optical disc 1; however, the cassette 2 is not limited to this. 4 As shown in Figure 4, the optical disc 3 is placed in the cassette 32.
A window 33 is provided to expose a part of the window 5, and a shutter 34 for opening and closing the window 33 is attached to the window 33.
A cassette may be used in which the window 33 can be opened and closed by sliding the cassette.

Furthermore, although an optical disk device has been described as an information processing device, the present invention is not limited to this, and the present invention is applicable to devices that require removing dust attached to the surface of an information storage medium, such as a floppy disk, a fixed magnetic disk, an optical card, etc.
Needless to say, the present invention can also be applied to devices using video discs, laser discs, and CDs.

[Effects of the Invention] As explained above, according to the present invention, the cleaning means is brought into pressure contact with the information storage medium by the pressure contact means, and the dust attached to the information storage medium is removed as the information storage medium rotates. The recording or reproduction of information is not adversely affected by dust and can be performed accurately.

[Brief explanation of drawings]

1 to 3 are diagrams showing one embodiment of an information processing device according to the present invention, and FIG. 1 is a perspective view showing this information processing device and an information storage medium used in this device. 2
The figure is a sectional view showing the main mechanism of this information processing device.
The figure is a sectional view taken along the line ■--■ in FIG. 2. FIG. 4 is a perspective view showing another example of a cassette for storing information storage@medium.

Claims (2)

[Claims] (1) In an information processing device that reproduces information recorded on a rotatable information storage medium, there is provided a cleaning means for removing dust attached to the surface of the information storage medium, and this cleaning means is pressed against the information storage medium. the cleaning means is brought into pressure contact with the information storage medium by the pressure contact means to remove dust attached to the surface of the information storage medium as the information storage medium rotates. Information processing equipment. (2) The information processing device according to claim 1, wherein the cleaning means is made of felt.