JPS63249989A - Recording medium - Google Patents

Abstract

PURPOSE:To improve the durability of a magnetic coating film by interposing a thin film sheet between a recording disk and a magnetic head. CONSTITUTION:A nonwoven fabric 2 is stuck to a vinyl chloride sheet 1, and a rectangular thin film sheet 4 is stuck to the inside of a head window 3 by heat or adhesion to close the head window 3. A recording disk 6 is incorporated in a case 5, and the vinyl chloride sheet 1 is folded and is thermally welded, and the thin film sheet 4 is interposed between the recording disk 6 and a magnetic head 7 of a drive. Thus, the slide action occurs between the recording disk 6 and the thin film sheet 4 in accordance with rotation of the recording disk but it is sufficient if the hardness of the thin film sheet is set to the same degree as the disk 6, and the durability of the magnetic coating film on the disk is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording medium such as a floppy disk,
The present invention relates to a recording medium on which information can be recorded and reproduced using a recording/reproducing head.

BACKGROUND ART FIG. 5 shows a perspective view of a conventional recording medium, and FIG.
This shows a state in which the recording medium is inserted into a recording/reproducing device (hereinafter referred to as a drive) and the magnetic head 1 is in contact with the recording disk 2.

When the recording medium 3 is installed in the drive, the recording disk 2 and the spindle shaft 4 of the drive are engaged through the center hole 6, and the rotational force of the spindle shaft 4 is applied to the recording disk 2.
and rotates the recording disk. Further, when the magnetic head 1 of the drive comes into contact with the recording disk 2, data is recorded and reproduced.

Problems to be Solved by the Invention A problem with the conventional configuration is that the magnetic head and the recording disk rotate while sliding, resulting in wear of the recording disk and the magnetic head.

In particular, when we consider the wear of magnetic heads, we find that because dozens of various recording disks alternately and repeatedly slide on one magnetic head, the sliding action takes several tens of times longer than that of a recording disk. It will be used for business. In consideration of this, hard ceramics or the like is generally used as the material for the magnetic head, and in reality, it is an expensive material.

Next, considering the recording disk, since hard ceramics or the like is used for the magnetic head, the recording disk is easily scratched by the sliding movement between the magnetic head and the recording disk. In order to prevent this, it is possible to make the magnetic coating applied to the surface of the recording disk harder.
If the surface of the recording disk is made hard, the magnetic head will wear out more severely, making it impossible to properly record and reproduce data.

Therefore, methods such as impregnating various lubricants into the composition of the magnetic coating film coated on the surface of the recording disk are used to prevent scratches, but the durability of the recording disk is generally low. Because more than 10 million passes are required for magnetic coating, it takes a lot of money and a long time to develop the composition of the magnetic coating.

Furthermore, in recent years, as recording capacity increases, new products must be developed one after another in a short period of time, and ensuring the durability of recording disks has become a major issue. In addition, since the surface of the recording disk is exposed to the outside through the head wind hole, foreign matter may enter through the head wind hole.
If the magnetic head gets stuck between the magnetic head and the recording disk, and the recording disk rotates while being stuck, the magnetic coating on the surface of the recording disk is peeled off, causing a recording error.

In view of the above-mentioned problems, the present invention aims to provide a recording medium having a magnetic coating film with high durability at low cost.

Means for Solving the Problems In order to achieve the above object, the present invention has a structure in which a thin film sheet is interposed between the recording disk and the magnetic head.

Effects of the present invention By interposing a thin film sheet between the magnetic head and the recording disk, sliding action occurs between the recording disk and the thin film sheet as the recording disk rotates.
Only the pressure force acts between the magnetic head and the thin film sheet,
No sliding action occurs.

Therefore, wear of the magnetic head is likely to occur. Also, the thin film sheet is built into the case of the recording medium, and the recording disk and the thin film sheet are a pair, and just like the magnetic head and recording disk without the thin film sheet, there is only one magnetic head. On the other hand, since the use situation is not uneven, such as using several dozen recording disks, it is possible to make the film and the recording disk of materials with the same hardness. With the above configuration, the strong magnetic force generated from the magnetic head permeates the thin film sheet and information is recorded on the magnetic disk, and the magnetic force recorded on the recording disk permeates the thin film sheet and is converted into an electrical signal by the magnetic head. information can be recorded and reproduced.

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

FIG. 1 is an exploded perspective view of a recording medium according to an embodiment of the present invention, and the recording medium is of a type in which a case is formed of a flexible PVC sheet. A nonwoven fabric 2 is fixed to a vinyl chloride sheet 1 punched out as shown in FIG. 1 and 6.

Further, a rectangular thin film sheet 4 is fixed by heat or adhesive to the inside of the head window 3 on which the magnetic head (not shown) of the drive is placed, so as to close the head window 3. There is.

A recording disk 6 is placed in the case 5 configured as described above.
is built-in, and PVC sheet 1 can be folded.

The case is thermally welded and has the completed shape as shown in FIG. 2, and as shown in FIG. 3, the thin film sheet 4 is interposed between the recording disk 6 and the magnetic head 7 of the drive.

FIG. 4 is an exploded perspective view of a recording medium according to another embodiment, in which the case is made of hard plastic such as ABS resin.

The upper case 15 and the lower case 15 are molded from plastic and have a nonwoven fabric 12 fixed to their inner surfaces, and are attached to a write protector 19 so as to be rotatable and slidable on the magnetic disk body 18.
Further, a thin film sheet 14 is fixed to the inside of the head window 13 by heat or adhesive to close the head window 13. Next, the upper case and lower case 15 are fixed to each other by means such as ultrasonic welding, and a shutter 20 is fitted so as to sandwich the fixed upper case and lower case 16. 20 are always pressed in one direction so as to cover the head windows 13 of the upper and lower cases.

Effects of the Invention The present invention has the above-described structure, and in order to prevent sliding movement between the magnetic head and the recording disk, the magnetic head is made of ceramic, which has high hardness and is expensive. For example, it is possible to replace it with a low-cost and highly productive plastic, etc.
Significant cost reductions in magnetic heads can be achieved.

In addition, when considering the durability of the magnetic coating that forms the surface of the recording disk, it is found that it is not used for sliding movement with a high-hardness magnetic head as in the past, but for sliding movement between the recording disk and a thin film sheet. Also, the relationship between the recording disk and the thin film sheet should not be 1:1, but the hardness of the recording disk and the thin film sheet should be about the same. Considerations can be reduced and new product development can be achieved in a short period of time.

Conventionally, the recording disk was exposed to the outside through the head window of the case, so foreign matter such as dirt and dust could enter from the outside and get caught between the magnetic head and the recording disk, causing damage to the surface of the recording disk. Previously, the magnetic coating film was peeled off, causing data errors, but according to the present invention, the head window is covered with a thin film sheet, so the recording disk is not exposed to the outside, and no foreign matter can enter. ,
Data errors caused by foreign objects can be completely eliminated.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a type of recording medium in which a case is formed of a flexible PVC sheet according to an embodiment of the present invention, FIG. 2 is a perspective view showing the completed state of the same recording medium, and FIG.
4 is an exploded perspective view of a type of recording medium in which the case is made of hard plastic according to another embodiment of the present invention; FIG. The figure is a perspective view of a conventional recording medium, and FIG. 6 is a sectional view showing the conventional recording medium inserted into a drive. 1... PVC sheet, 2.12... Non-woven fabric, 3゜13... Head window, 4.14.
...Thin film sheet, 5,15...Case,
6...recording disk, 7...magnetic head, 18...magnetic disk body, 19...
・Light protector, 2o... Shutter, 2
1... Spring. Name of agent Patent attorney Toshio Nakao and 1 other person E 1* Pizoto 1N Kaisho 63-249989 (4) 1/22 o-1-ja 1. Ku13 21--Bathing/n--~ ,/ ,, ,. □ 7′/′ ＼ y/y s t5 ′ 1 7′ r″1δ −′ N ) / ↑ 7− −−−/ , r2

Claims (1)

[Claims] A case rotatably houses a disk-shaped recording disk capable of recording information, and the case includes a drive shaft of a recording/reproducing device that engages with the recording disk and rotates the recording disk. A center hole for insertion and a head window hole for bringing a recording/reproducing head of a recording/reproducing device close to the recording disk in order to record and reproduce information, and a thin film is provided between the recording disk and the recording/reproducing head. A recording medium characterized by having a sheet interposed therebetween.