JPH1055647A - Cartridge for recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a dust and to suppress the vibration of a recording medium by stabilizing the air flow generated in company with the high speed rotation of the recording medium. SOLUTION: The disk-like recording medium 4 is rotatably housed in a case C joined with upper/lower shells 1, 2, and liners 5, 6 are fixed on inner surfaces of the shells confronted with the recording medium 4. Further, intake ports 12, 13 penetrating the upper surface or bottom surface of the case C are opened at the center side part of the case C and also within the area where the liners 5, 6 are arranged, and a discharge part 14 penetrating the outer peripheral edge part is opened on the joined surface of the upper shell 1 and lower shell 2 on the outer peripheral edge part of the case C, then the air flow to the discharge port 14 from the intake ports 12, 13 is generated in company with the rotation of the recording medium 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium cartridge for accommodating a disk-shaped recording medium (hereinafter, referred to as a medium) in a case formed by joining upper and lower shells, and more particularly to a magnetic disk cartridge for dust removal and media. The present invention relates to imparting stability during high-speed rotation.

[0002]

2. Description of the Related Art A cartridge for a recording medium, particularly a magnetic disk cartridge, has a flexible magnetic disk medium rotatably accommodated in upper and lower shells made of synthetic resin.

Needless to say, in this magnetic disk cartridge, it is necessary to ensure high reliability. From the viewpoint of reliability, it is important to prevent dust, which causes so-called dropout, from adhering to the medium, or to immediately remove the adhering dust. This dust may be generated not only when entering from outside the magnetic disk cartridge, but also inside the magnetic disk cartridge, for example, from a liner or the like arranged to protect the medium.

On the other hand, in response to the recent increase in the density of media, high-speed rotation of the media has been pursued. In this high-speed rotation, the turbulence (hereinafter referred to as turbulence) of the air generated by the rotation of the medium becomes remarkable, and the vibration of the medium, that is, the so-called disk flutter phenomenon occurs, which causes the output fluctuation. If the vibration is remarkable, the medium may contact the head with a certain impact force, and a head crash that may damage both may occur.

If the dust adheres to the medium, the dust itself may cause a head crash, and it is necessary to take a comprehensive measure.

In view of the above, Japanese Patent Publication No. 3-5035
No. 6, a radial groove is provided on the inner surface of the shell to stabilize the air flow inside the shell to prevent the occurrence of disk flutter. Also, as shown in JP-A-8-87853, There is disclosed a technology in which a vent provided with a filter is provided at a lower portion and a lower portion, and an airflow is generated from the vent to a side opening to prevent dust from entering.

[0007]

However, in the above-described prior art, both of the related problems of dealing with dust generated inside the magnetic disk cartridge and removing the dust and increasing the speed of the medium are achieved. It cannot be solved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables the removal of dust, particularly dust generated inside a magnetic disk cartridge, and achieves the stabilization of high-speed rotation of a medium at the same time. The object of the present invention is to provide a recording medium cartridge capable of rotating at high speed, which has extremely high reliability and can cope with high density of the medium.

[0009]

According to the present invention, there is provided a recording medium cartridge in which a disk-shaped medium is rotatably accommodated in a case formed by joining an upper shell and a lower shell. In the case where the liner is fixed to the inner surface of the upper shell and the lower shell facing each other, the upper surface or the lower surface of the case penetrates the center side portion of the case and within the installation range of the liner,
At least one intake port is opened, and an exhaust port is opened at a joint surface between an upper shell and a lower shell at an outer peripheral edge portion of the case. As the medium rotates, airflow from the intake port to the exhaust port is increased. Is generated.

The cross-sectional area of the intake port is preferably 0.2 to 2.5 in consideration of the ease of intake and the difficulty of intrusion of dust from the outside.
mm ^2, more preferably 0.5 to 2.0 mm ^2, and most preferably better be 0.7 to 1.2 mm ^2. The shape may be appropriately selected from a circular shape, a slit shape, and the like, but a slit shape is desirable from the viewpoint of difficulty of dust intrusion. At least one location is required, but two or more locations are effective, and four to eight locations are preferred from the viewpoint of aesthetics and preventing dust from entering through the opening.

The cross section of the exhaust port is the same as that of the intake port, but the shape may be a minute gap structure which is not normally recognized as an exhaust port. In this case, the gap size is preferably 5 to 100 μm, more preferably 10 to 70 μm, and most preferably 20 to 50 μm. If the position of the exhaust port is a position that is exposed when the shutter member that opens and closes the head insertion opening is in the open position, it is covered by the shutter member when the media is not in use, preventing dust from entering. it can.

It is preferable that the liner is extended to an opening of the exhaust port facing the side where the medium is stored, so that the dust is mechanically prevented from entering.

On the other hand, it is preferable to provide ribs on the inner surfaces of the upper shell and the lower shell so that the liner approaches the surface of the medium. Moreover, it is desirable to dispose the ribs so as to concentrate the airflow toward the exhaust port in order to generate a more stable airflow.

[0014]

According to the recording medium cartridge of the present invention as described above, the liners are fixed to the inner surfaces of the upper shell and the lower shell facing the disk-shaped medium, respectively, and the liner is fixed at the center of the case and at the center of the liner. By opening the intake port in the installation range and opening the exhaust port on the joint surface of the upper and lower shells at the outer peripheral edge portion of the case, the rotation of the media generates airflow in a certain direction, which is generated from the liner. Dust adhered to the media surface,
It can be reliably removed together with the airflow.

By providing the ribs, a part of the liner is always in contact with the media, so that dust adhering to the media surface can be directly removed. In addition, since the ribs positively direct the flow of the airflow toward the exhaust port and have a rectifying action, the airflow can be prevented from being turbulent due to high-speed rotation of the medium, and disk flutter can be prevented.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is an external perspective view of a magnetic disk cartridge as an example of a recording medium cartridge, and FIG. 2 is an exploded perspective view thereof.

The magnetic disk cartridge has a flat case C formed by joining an upper shell 1 and a lower shell 2 made of a resin molded product such as an acrylonitrile-butadiene-styrene copolymer. Disc-shaped medium 4 as a recording medium fixed to hub 3
A (magnetic disk medium) is stored in a rotatable state, and an upper liner 5 and a lower liner 6 are provided above and below the medium 4. In the medium 4, a recording area 4a is set in an annular shape excluding an outer peripheral portion and an inner peripheral portion, and an outer edge portion of the recording area 4a is an outer peripheral non-recording portion 4b.

The upper shell 1 and the lower shell 2 have a substantially rectangular flat plate shape.
a, 2a are provided, and the internal rib 1
b, 2b, and a rectangular magnetic head insertion opening 10,
11 is open. Further, on the inner surfaces of the upper shell 1 and the lower shell 2, an octagonal (or round) upper liner 5 and a lower liner 6 made of a nonwoven fabric or the like are adhered by ultrasonic welding or the like. The internal rib 1b,
2b is formed outside the liners 5 and 6 along the shape thereof.

An annular rib 1c for supporting the rotation of the center hub 3 is provided at the center of the upper shell 1, and a hub hole 2c for inserting the driving rotary head of the center hub 3 is provided at the center of the lower shell 2. Is provided.

Further, a shutter member 7 which is slidable for opening and closing the magnetic head insertion openings 10 and 11 is assembled to the case C. The shutter member 7 is formed in, for example, a metal plate or plastic and has a substantially U-shaped cross section, and has openings 7a corresponding to the magnetic head insertion openings 10 and 11.

In the center part of the case C and within the installation range of the liners 5 and 6, four intake ports 12 and 13 penetrating through the top and bottom surfaces of the case C are respectively shown in the figure. . A front end face, which is an outer peripheral edge portion of the case C, has a joint surface between the upper shell 1 and the lower shell 2 at a position opened and closed by the shutter member 7, that is, outer peripheral ribs 1a and 2a of the upper and lower shells 1 and 2. A groove-shaped concave portion is provided on the joint end surface, and an exhaust port 14 is opened. Since the exhaust port 14 is opened only when the shutter member 7 is opened, it is possible to prevent dust from entering from outside when the shutter member 7 is closed, that is, when the magnetic disk cartridge is not used.

On the other hand, straightening ribs 1 for bringing the liners 5 and 6 close to the surface of the medium 4 on the inner surfaces of the upper shell 1 and the lower shell 2 so that the liner surfaces contact the air flow.
6, 17 are installed. In addition, the rectifying ribs 16,
Numeral 17 extends from the center side to the exhaust port 14 and is configured to concentrate the airflow at the exhaust port 14, thereby preventing turbulence of the airflow and obtaining a stable airflow flowing smoothly to the exhaust port 14. Can be

With the above-described magnetic disk cartridge, an airflow is generated from the center toward the outer periphery of the medium 4 with the rotation of the medium 4, and the center is decompressed to allow the outside air to flow from the air inlets 12 and 13. The outside air contains a corresponding amount of dust, but since the liners 5 and 6 function as a filter, the air becomes a clean airflow after passing through the liners 5 and 6, and the dust on the surface of the medium 4 can be removed. . Also, the centrifugal force of the media 4 itself acts,
The dust is blown off in the radial direction, is captured by the airflow, and is carried toward the exhaust port 14.

Further, since a part of the liners 5 and 6 is in direct contact with the surface of the medium 4 by the flow regulating ribs 16 and 17, dust adhering to the surface of the medium 4 is directly removed. The rectifying ribs 16 and 17 positively direct the flow of the airflow toward the exhaust port 14 and have a rectifying function to prevent the turbulence of the airflow due to the high-speed rotation of the medium 4. Has been prevented.

FIGS. 3 and 4 show another embodiment.
This is an example in which the exhaust port 15 is provided on the side surface of the case C. Other configurations are the same as those in FIGS. 1 and 2, and the same portions are denoted by the same reference numerals and description thereof will be omitted.

The outer peripheral ribs 1a and 2a on the side surfaces of the upper shell 1 and the lower shell 2 are provided with concave portions on the joint end surfaces thereof, and two exhaust ports 15 are provided. It is arranged so as to be obliquely inclined corresponding to the direction of rotation of the airflow so as to match the airflow direction.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a magnetic recording cartridge as a recording medium cartridge according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view of upper and lower shells and a medium of the magnetic recording cartridge.

FIG. 3 is a partial plan view of a recording medium cartridge according to another embodiment.

4 is a side view of the recording medium cartridge in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper shell 2 Lower shell 1a, 2a Outer peripheral rib C case 4 Media (recording medium) 5, 6 Liner 7 Shutter member 10, 11 Magnetic head insertion port 12, 13 Intake port 14, 15 Exhaust port 16, 17 Rectification rib

Claims (3)

[Claims] 1. A disk-shaped recording medium is rotatably accommodated in a case formed by joining an upper shell and a lower shell, and liners are respectively fixed to inner surfaces of an upper shell and a lower shell facing the recording medium. In the cartridge for a recording medium, at least one intake port penetrating the upper surface or the bottom surface of the case is opened in the center side portion of the case and within the installation range of the liner, and at the outer peripheral edge portion of the case. A recording medium characterized by opening an exhaust port penetrating the outer peripheral edge portion at a joint surface between a shell and a lower shell, and generating an airflow from the intake port to the exhaust port with rotation of the recording medium. For cartridges. 2. The apparatus according to claim 1, wherein the liner extends to an opening of the exhaust port facing a side where the recording medium is stored, and shields dust from entering from outside. 4. The recording medium cartridge according to claim 1. 3. The recording medium cartridge according to claim 1, wherein ribs are provided on the inner surfaces of the upper shell and the lower shell to make the liner approach the surface of the recording medium.