JPH06302139A - Disk cartridge - Google Patents

Abstract

(57) [Abstract] [Purpose] A disk cartridge capable of preventing the magnetic head from catching the dust on the disk surface and destroying the disk even if dust-proof measures are not taken on the recording / reproducing apparatus side. I will provide a. [Structure] In a disk cartridge having a magnetic head insertion hole and a shutter that covers the insertion hole, a disk is rotatably accommodated in the cartridge, a cleaning liner sheet is interposed, and the shutter is interlocked with the opening. Then, a means for rotating the disc by a predetermined angle is provided, or a member for cleaning the disc in conjunction with opening of the shutter is provided on the shutter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge in which a disk, which is a disk-shaped recording medium, is rotatably housed in a case.

[0002]

2. Description of the Related Art As a dustproof measure for a conventional disc cartridge, a shutter is provided to prevent dust from coming into contact with a magnetic head from an insertion hole for recording / reproducing on a disc. Sometimes
A liner sheet for absorbing dust is provided. The dustproof measures of the conventional disc cartridge will be described in detail below.

FIG. 5 is an exploded perspective view of a conventional disk cartridge. The magnetic disk 10 has an upper surface sandwiched by an upper liner sheet 8a and a lower surface sandwiched by a lower liner sheet 8b, and further, an upper cartridge 7a and a lower cartridge 7b.
It is sandwiched between and stored. The lower cartridge has an opening 15 for a chucking hub 14 that is chucked with the disk rotating mechanism of the recording / reproducing apparatus, and both upper and lower cartridges have a magnetic head insertion hole 12 that allows contact with the magnetic head to record / reproduce on / from the disk. . Further, the shutter 6 covers the insertion hole 12 in order to prevent dust entering through the insertion hole, and has a function of opening when it is mounted on the recording / reproducing apparatus. Further, the lifter 11 including the fixing portion 11a fixed to the inner wall portion 9 of the lower cartridge 7b and the standing portion 11b standing on the lower liner sheet 8b side presses the lower liner sheet to bring the liner sheet into contact with the disc, Clean the disc surface. Conventionally, the liner material is a partially heat-bonded nonwoven fabric made of rayon fibers and polypropylene fibers or partially heat-bonded nonwoven fabric made of polyester fibers or polyacrylonitrile fibers, and dust is entangled in the fibers. Be absorbed.

As described above, the disk cartridge has the function of protecting the disk surface from damage by cleaning the disk surface by the liner material when the disk rotates.
However, if the magnetic head comes into contact with the disk when the disk is not attached to the disk rotating mechanism of the recording / reproducing apparatus and cannot start rotating when the disk is mounted in the recording / reproducing apparatus, dust will be generated on the disk surface. If so, dust will be trapped between the magnetic head and the disk. If the disc starts to rotate in this state, it will definitely be destroyed. Conventionally, a measure has been taken on the recording / reproducing apparatus side in order to avoid this. The details will be described below.

FIG. 6 is a structural view of a carriage for supporting a magnetic head showing a conventional example. First magnetic head 21a
Is supported by the first gimbal 23a and mounted on the first carriage 26, and the second magnetic head 21b is supported by the second gimbal 23b and mounted on the second carriage 27. Then, the second carriage 27 has the leaf spring 3
It is screwed to the first carriage 26 via 1 and can be moved in a direction indicated by the rotation direction 30 of the second carriage by the pressing means 28 with the supporting portion 29 of the second carriage as a fulcrum. Before the normal disc is not inserted, the second
The carriage 27 is lifted by the holding portion 24 of the second carriage, and the entire second carriage is held by being rotated in the upward direction indicated by the rotation direction 30. When the disc is inserted, the holding state of the holding portion 24 of the second carriage is released almost at the same time, so that the second carriage 2
7 is instantaneously rotated downward by the pressing means 28 and loaded on the disk. However, as described above, if the magnetic head is loaded while the disk is not rotating, dust that has not been removed from the surface of the disk will be trapped, resulting in destruction of the disk. In particular, even when normally stored, the disk surface in the magnetic head insertion hole 12 portion is more likely to collect dust than the portion with the liner sheet, although it is protected by the shutter, and the magnetic head is likely to bite the dust. . For this reason, in the conventional example, the damper 25 is provided to increase the time until the magnetic head is loaded, and a mechanism is adopted in which the magnetic head is loaded after the disk rotates sufficiently to remove dust.

Further, in another conventional example, a head loading mechanism for loading and unloading the magnetic head is provided,
After the disk is chucked by the disk rotation mechanism and rotated for a predetermined time, the magnetic head is loaded. This avoids the destruction of the disk due to the trapping of dust that has not been removed on the surface of the disk.

[0007]

However, the countermeasures as in the conventional example are not carried out in all the recording / reproducing apparatuses, and the recording / reproducing apparatuses in which the countermeasures are taken are rarer. Further, in recent years, the recording / reproducing apparatus has become higher in density and the recording wavelength tends to become shorter. Therefore, even a slight disc defect due to dust having a small particle size has a great influence on the recording / reproducing characteristics. Furthermore, in recent years, as the recording / reproducing apparatus has become thinner, it has become difficult to reduce the size of the damper and head load mechanism as described above, and it is becoming difficult to take dustproof measures on the recording / reproducing apparatus side. Have.

Therefore, the present invention solves such a problem, and an object of the present invention is to prevent dust from being caught on the surface of a disc even if dust-proof measures are not taken on the recording / reproducing apparatus side. An object of the present invention is to provide a disc cartridge capable of preventing the disc destruction due to

[0009]

DISCLOSURE OF THE INVENTION In a disk cartridge of the present invention, a disk, which is a disk-shaped recording medium, is rotatably accommodated in the cartridge, and is opposed to at least one surface of the disk for cleaning. A disc cartridge having a liner sheet and having an insertion hole for contacting the recording / reproducing head of the recording / reproducing device with the disc, and a shutter having a function of covering the insertion hole and opening when the recording / reproducing device is mounted. According to another aspect of the invention, there is provided means for rotating the disc by a predetermined angle in synchronization with opening of the shutter.
Another disc cartridge of the present invention is such that a disc that is a disc-shaped recording medium is rotatably accommodated in the cartridge,
A cleaning liner sheet is interposed in the cartridge so as to face at least one surface of the disk,
In a disc cartridge having an insertion hole for contacting the recording / reproducing head of the recording / reproducing device with the disc, and a shutter having a function of covering the insertion hole and opening when the disc is mounted in the recording / reproducing device, the shutter is opened. The shutter is provided with a member for cleaning the disc in conjunction with the above.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a first embodiment of the present invention and shows a schematic view of the structure of a disk cartridge. FIG. 1 shows a disk 10 on a lower cartridge 7b and a shutter 6 shown by a wavy line.
Shows a state in which it is about half open. The rack 1 is joined to the shutter 6 by the rack supporting portion 2 and can move in the direction indicated by the moving direction 2a on the guide provided on the cartridge in association with the movement of the shutter 6. Along with that, the pinion 4 can move around the pinion shaft 4a sandwiched between the upper and lower cartridges in the direction indicated by the rotation direction 5a with the pinion tip 3 thereof. Therefore, when the shutter 6 is closed, the pinion tip 3 rotates clockwise to move away from the disk 10, and when the shutter 6 is completely open, it rotates counterclockwise to move away from the disk 10. FIG. 2 is a side view of the pinion tip portion showing the first embodiment of the present invention. The pinion tip portion has a tapered shape, and the tapered portion is covered with the elastic member 3a. Therefore, the disk 10 can be sandwiched and the rotation direction 5a
The disc can be rotated with the movement indicated by. When the shutter 6 is opened, the pinion tip 3 rotates counterclockwise, so that the disk 10 sandwiched by the elastic members 3a moves in the direction indicated by the rotation direction 5b. As a result, the disk surface portion in the magnetic head insertion hole 12 moves into the cartridge having the liner sheet.
Even if the disk surface of the magnetic head insertion hole 12 portion is protected by the shutter, dust is more likely to accumulate than the portion with the liner sheet, and the magnetic head is more likely to bite the dust. Since the disc surface portion which is located in the cartridge moves into the cartridge having the liner sheet, the dust on the disc surface is removed, and the destruction of the medium due to the trapping of the dust can be prevented.

FIG. 3 is a structural schematic diagram of a disk cartridge showing a second embodiment of the present invention. FIG. 3 shows a state in which the shutter 6 is approximately half opened. Shutter 6
A cleaning member 15 is adhered to. Figure 4
It is a structural diagram of a shutter showing a second embodiment of the present invention. The same cleaning member 15 is adhered to the back surface side of both magnetic head insertion holes 16 along the side surface of the opening direction of the shutter to sandwich the disk. Accordingly, the magnetic head insertion hole 12 of the disk cartridge 7 is widened by the width of the cleaning member.
In the second embodiment of the present invention, when the shutter is opened, both cleaning members are interlocked with it to open the magnetic head insertion hole 12.
Since the dust on the surface of the disc that exists in the portion is removed, it is possible to prevent the destruction of the medium due to the trapping of the dust.
The cleaning member 15 may be made of the same material as the liner. Further, the second embodiment can surely remove dust on the disk surface in the magnetic disk insertion hole portion by combining with the above-mentioned first embodiment, and further prevent the destruction of the medium due to the trapping of dust. Can be increased.

[0012]

As described above, according to the disk cartridge of the present invention, the thickness of the recording / reproducing apparatus has been reduced in recent years,
It became difficult to downsize the damper and head load mechanism,
Even when it is used in a recording / reproducing apparatus for which no dustproof measure is taken, it is possible to prevent the destruction of the disc due to the inclusion of dust on the disc surface.

As a result, the density of the recording / reproducing apparatus is further increased, the recording wavelength is shortened, and even a small disk defect due to dust having a small particle size has a great influence on the recording / reproducing characteristics. However, the operation of the recording / reproducing apparatus with stable recording / reproducing characteristics can be realized without being affected by this.

[Brief description of drawings]

FIG. 1 is a schematic structural view of a disc cartridge according to a first embodiment of the present invention.

FIG. 2 is a side view of the pinion tip portion according to the first embodiment of the present invention.

FIG. 3 is a structural schematic diagram of a disk cartridge showing a second embodiment of the present invention.

FIG. 4 is a structural diagram of a shutter showing a second embodiment of the present invention.

FIG. 5 is an exploded perspective view of a conventional disk cartridge.

FIG. 6 is a structural diagram of a carriage that supports a magnetic head according to a conventional example.

[Explanation of Codes] 1 ... Rack 2 ... Rack support 3 ... Pinion tip 3a ... Elastic member 4 ... Pinion 5a ... Pinion tip rotation direction 5b ... Disk Rotation direction 6 ... Shutter 7 ... Cartridge 7a ... Upper cartridge 7b ... Lower cartridge 8a ... Upper liner sheet 8b ... Lower liner sheet 9 ... Inner wall portion of lower cartridge 10. -Disk 11 ... Lifter 11a ... Fixed portion 11b ... Standing portion 12 ... Magnetic head insertion hole 14 ... Chucking hub 15 ... Cleaning member 21a ... First magnetic head 21b ... second magnetic head 23a ... first gimbal 23b ... second gimbal 24 ... second carriage holding portion 25 ... damper 26 ... First carriage 27 ... Second carriage 28 ... Pressing means 29 ... Second carriage support 30 ... Second carriage rotation direction 31 ... Leaf spring

Claims (5)

[Claims] 1. A disc-shaped recording medium such as a disc is rotatably housed in a cartridge, and a cleaning liner sheet is provided in the cartridge so as to face at least one surface of the disc. In a disc cartridge having an insertion hole for contacting the recording / reproducing head and the disc, and a shutter covering the insertion hole and having a function of opening when the recording / reproducing device is mounted, the shutter is interlocked with the opening. A disc cartridge comprising means for rotating the disc by a predetermined angle. 2. The means for rotating a predetermined angle according to claim 1,
A disc cartridge comprising a pinion having a member capable of holding a disc and a rack joined to a shutter. 3. A disk, which is a disk-shaped recording medium, is rotatably housed in a cartridge, a cleaning liner sheet is provided in the cartridge so as to face at least one surface of the disk, and In a disc cartridge having an insertion hole for contacting the recording / reproducing head and the disc, and a shutter covering the insertion hole and having a function of opening when the recording / reproducing device is mounted, the shutter is interlocked with the opening. A disk cartridge, wherein a member for cleaning the disk is provided on the shutter. 4. A disk cartridge, wherein the cleaning member according to claim 3 is made of the same material as the liner sheet. 5. A disk, which is a disk-shaped recording medium, is rotatably housed in a cartridge, and a cleaning liner sheet is provided inside the cartridge so as to face at least one surface of the disk. In a disc cartridge having an insertion hole for contacting the recording / reproducing head and the disc, and a shutter covering the insertion hole and having a function of opening when the recording / reproducing device is mounted, the shutter is interlocked with the opening. And a means for rotating the disk by a predetermined angle, and a member for cleaning the disk in association with the opening of the shutter is provided on the shutter.