JPH01162285A - Cartridge for floppy disk - Google Patents

Abstract

PURPOSE:To remove dust to be introduced from the external part of a cartridge, to remove the dust to be generated in the cartridge, and to stabilized a medium when a disk rotates by building a dust removing filter in the cartridge. CONSTITUTION:The dust removing filter is built in a cartridge 1, a means to screen an air flow is provided at a head window 5 part of the cartridge, an inflow port 9 of the air flow is provided at one edge part of the cartridge, an exhaust port 10 of the air flow is provided at the other edge part of the cartridge, and filters 11 to remove the dust are provided near the inflow port and the exhaust port. Thus, the dust in the cartridge can be decreased, the surface deflection quantity of a magnetic disk can be decreased, the magnetic disk and a magnetic head can be contacted stably, and the dropout phenomenon of a signal can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a floppy disk cartridge that stably rotates a flexible medium such as a floppy disk and is highly reliable.

[Conventional technology]

The conventional floppy disk cartridge was developed in 1987.
As described in Japanese Patent Application No. 191983, a suppression means is provided in the case to remove dust and distortion from the magnetic disk, thereby reducing dropouts.

[Problem that the invention seeks to solve]

The conventional cartridge described above includes a recording medium that can be recorded and reproduced by a magnetic head, a nonwoven fabric called a liner that removes and protects dust generated from the medium, and a lifter that helps remove distortion of the recording medium and removes the dust. It is made up of elastic pieces called However, although the above technology removes dust using an elastic piece (lifter) inside the cartridge, it is not reliable as the dust may land on the disk again, and the liner is supposed to remove distortion of the disk. Since the disk is in stronger contact with the lifter, there are problems such as generation of dust and inability to stabilize the medium when the disk rotates at high speed.

The purpose of the present invention is to remove dust entering from outside the cartridge, removing dust generated inside the cartridge, and stabilizing the medium during disk rotation, ensuring stable contact between the magnetic head and the magnetic disk, and ensuring stable contact between the magnetic head and the magnetic disk. The dropout phenomenon is improved, and the durability of the disc is improved.

[Means for solving problems]

The above object is to provide a means for incorporating a dust removal filter in a cartridge to suppress air flow to a head window portion of the cartridge, and to provide an air flow inlet hole at one end edge of the cartridge and an air flow inlet hole at the other end edge of the cartridge. This is achieved by providing a discharge hole in the inflow hole and a filter for removing dust near the inflow hole and the discharge hole.

[Effect]

A filter built into the cartridge uses airflow generated by the disk to remove dust floating inside the cartridge. In addition, by suppressing the air flow from the head window and forming an air flow path by providing an air flow inlet hole on one edge of the cartridge and an air outlet hole on the other edge, the disk rotates. This allows air to flow stably within the cartridge. By providing filters in the inlet and outlet holes and suppressing the air flow from the head window, dust entering from outside the cartridge can be removed, and dust generated inside the cartridge can be easily removed. It becomes possible to do so.

In addition, because the air flows in an orderly manner through the air flow path mentioned above,
Flexible media can be stabilized.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the cartridge 1 is composed of a flexible magnetic disk 2 and a hard case 3 that covers the flexible magnetic disk 2 from both the upper and lower sides. The magnetic disk 2 rotates in the direction of the arrow 4 in the space of the hard case 3 which covers the magnetic disk 2 from above and below. Further, the case 3 is formed with a head window (elongated hole) 5 into which a magnetic head is inserted.

Furthermore, dust removal filters 6R1 and 6L are provided near the outer periphery of the disk in this cartridge 1, and the airflow as the magnetic disk 2 rotates in the direction of arrow 4 passes through the dust removal filter 6R.

Flows to 6L. Therefore, dust entering from outside the cartridge 1 and dust generated and floating inside the cartridge 1 are removed by the filter 6R.

It will be easily removed by 6L.

Further, in this cartridge 1, a tanza-shaped spacer 7 and a sheet 8 made of, for example, non-woven fabric are provided on both sides of the head window 5 so as to sandwich the magnetic disk 2 therebetween. In this way, the air flow through the head window 5 is suppressed. Further, an air flow inflow hole 9 is provided at one end edge of the cartridge 1, and an air flow hole 10 is provided at the other end edge to rectify the flow of air within the cartridge 1 as the magnetic disk 2 rotates. .

Furthermore, the air flow inflow hole 9 provided in the cartridge 1
A dust removal filter 11 is provided near the discharge hole 10 to remove dust entering from outside the cartridge 1.

FIG. 2 shows the head window 5 of the present invention described in FIG.
FIG. Each spacer 7 is attached to the upper case 3b and the lower case 3a, and the sheet 8
They are provided so as to sandwich the magnetic disk 2 between them.

Although the sheet 8 is bonded to the case 3, the portion from the spacer 7 to the head window 5 is not bonded to the upper and lower cases, and one end is free.

As described above in FIG. 1, the configuration is such that the airflow is suppressed in the head window 5 portion.

By providing a dust removal filter (for example, non-woven fabric) in the air flow path of the air flow inlet hole 9 and the air outlet hole 10 and the flow path, it is possible to remove dust that enters from outside the cartridge, and dust that is generated inside the cartridge can be removed. Dust can also be easily removed. Air flows stably within the cartridge due to the air flow path (II flow), and even when the magnetic disk rotates at high speed, the magnetic disk rotates stably with little surface runout. Another effect of the shielding structure of the head window 5 is that it reduces the surface runout of the disk caused by the distortion of the a-air disk 2 and the vibration generated by the magnetic head 12 and the magnetic disk 2.

From the above, the magnetic head and the magnetic disk make stable contact, eliminating the signal dropout phenomenon and eliminating errors in recording and reproduction.

FIG. 3 is an example of a comparison between a conventional cartridge and a cartridge of the present invention regarding the amount of surface runout of the magnetic disk 2 in the head window 5 section. The vertical axis shows the amplitude (μm'''''P
), and as can be seen from this figure, the amount of surface runout 15 of the cartridge of the present invention is sufficiently reduced compared to the amount of surface runout 14 of the conventional cartridge, and is effective.

As explained above, a filter is built into the cartridge to remove dust that has entered the cartridge and dust that has been generated inside. Further, by proactively providing an air flow path in the cartridge, it becomes possible to easily collect dust in the filter.

Furthermore, the air flow path eliminates the airflow inside the cartridge caused by the rotation of the magnetic disk, and therefore the surface runout of the magnetic disk can be reduced and stabilized.

〔Effect of the invention〕

From the above, according to the present invention, the amount of dust in the cartridge is reduced, and the amount of surface runout of the magnetic disk is reduced, thereby enabling stable contact between the magnetic disk and the magnetic head, thereby preventing signal dropout. It is possible to provide a cartridge that eliminates

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing the structure of a cartridge according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a portion near the head window in FIG. 1, and FIG. 3 is a head window of the present invention. FIG. 3 is a diagram illustrating an example of a comparison between the amount of surface runout of a magnetic disk and a conventional cartridge. 1...Cartridge, 2...Magnetic disk, 5...
・Head window, 6... Filter, 7... Plate, 8... Sheet, 9... Inflow hole, 10... Discharge hole, 11... Two, ''''- ■ 1 Figure 1 Cartridge ゛゛t Filter 7 Shave 3 Sheet 95 9 pieces JL 10 Discharge / / Fill 7 2 j Air density 7 7 Shape F 12 H t I book () 6b J no responsibility, re

Claims (1)

[Scope of Claims] 1. A floppy disk cartridge rotatably housing a disk-shaped flexible recording medium, characterized in that a dust removal filter is built into the cartridge. 2. A means for suppressing airflow in the head window portion of the cartridge, an inflow hole for the airflow at one end edge of the cartridge, and a discharge hole at the other end edge. A floppy disk cartridge according to claim 1. 3. The floppy disk cartridge according to claim 2, further comprising a dust removal filter disposed near the air flow inlet and outlet holes provided in the cartridge.