JPH06215518A - Produciton of disk cartridge - Google Patents

Abstract

PURPOSE:To improve a head touch and to prevent the generation of errors by determining the threshold of a pressing stroke at the time of pressing and fixing a flange part and an inner peripheral edge via an adhesive on the bases of the chucking surface of a hub. CONSTITUTION:The hub 2 and a medium 3 are superposed on a flange part 21 or inner peripheral edge 31 by applying an adhesive 4 thereto. The inner peripheral edge 31 is then pressed toward a flange part 21 side in the form of slightly crushing the adhesive 4 by the opening peripheral edge 52 of a pressing means 5 and is stopped at the point of the time the inside base of the aperture of the pressing means 5 comes into contact with the chucking surface 22. The distance from the chucking surface 22 of the hub 2 to the medium 3 is kept constant at all times by this constitution. The good head touch of a magnetic head at the time of traveling of the medium in a drive is thus obtd. and the generation of the errors is lessened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a disk cartridge, and more particularly to a method of manufacturing a disk cartridge in which a magnetic head has a good head touch when a medium is running in a drive and therefore no error is generated.

[0002]

2. Description of the Related Art A magnetic disk housed in a cartridge is, as shown in FIG. 5, a flange portion 21 of a hub 2 having a substantially hat shape in a central portion and an inner peripheral edge portion 31 of a medium (disk) 3 having a hollow disk shape. The magnetic disk 1 is configured by adhesively fixing the magnetic disk 1 and the magnetic disk 1 as shown in FIGS.
After the adhesive 4 is applied to the flange 21 or the inner peripheral edge 31, the flange 21 and the inner peripheral edge 31 are attached to the adhesive 4 between the pedestal 6'and the pressing tool 5'in the manufacturing apparatus. Manufactured by sandwiching via, pressing and fixing.

[0003]

However, in the magnetic disk 1 manufactured as described above, the distance h from the chucking surface 22 of the hub 2 to the surface of the medium 3 varies as shown in FIG. Therefore, depending on the magnetic disk 1, when loaded in a drive and run,
Some magnetic heads have a bad head touch and may cause an error.

Therefore, the object of the present invention is that the distance from the chucking surface of the hub of the magnetic disk to the media surface is always constant. Therefore, when the media is running in the drive, the head touch of the magnetic head is good and an error occurs. It is an object of the present invention to provide a method for manufacturing a disk cartridge that does not have the risk of

[0005]

DISCLOSURE OF THE INVENTION As a result of various investigations by the present inventors, a method of manufacturing a magnetic disk 1 in which the distance h from the chucking surface 22 of the hub 2 to the surface of the medium 3 is always constant , The flange portion 2 of the hub 2
1 and the inner peripheral edge portion 31 of the medium 3 are conventionally fixed under pressure under a certain load, and therefore, FIG.
As shown in FIG. 3, paying attention to the fact that the distance h varies due to variations in the amount of the adhesive 4 applied and in the molding of the hub 3, and the pressing fixture 5'is not fixed with a constant load. , It has been found that the above-mentioned problems can be solved by making the pressing position constant.

The present invention has been made on the basis of the above-mentioned findings. After applying a magnetic disk to be housed in a cartridge to the flange portion of a substantially hat-shaped hub or the inner peripheral edge portion of a hollow disk-shaped medium, an adhesive is applied. In a method of manufacturing a disk cartridge in which the flange portion and the inner peripheral edge portion are pressed and fixed via the adhesive, a limit of a pressing stroke in the pressing is determined based on a chucking surface of the hub. The present invention provides a method for manufacturing a disc cartridge, which is characterized by the above.

[0007]

According to the disk cartridge manufacturing method of the present invention, since the limit of the pressing stroke in the pressing is determined on the basis of the chucking surface of the hub, the thickness of the adhesive when pressed and fixed is It covers variations in the amount of adhesive applied and the molding of the hub, and the distance from the chucking surface of the hub to the media surface is always constant.
The head touch of the magnetic head is good.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk cartridge manufacturing method of the present invention will be described below with reference to the drawings together with an example of a magnetic disk manufacturing apparatus configured to carry out the manufacturing method. FIG. 1 is a sectional view showing a main part of an example of a magnetic disk manufacturing apparatus configured to carry out a disk cartridge manufacturing method of the present invention, and FIG.
FIG. 6 is a partial cross-sectional view showing a state where the pressing stroke of the pressing tool is completed in the magnetic disk manufacturing apparatus shown in FIG.

As shown in FIG. 5, the magnetic disk manufactured by the method for manufacturing a disk cartridge of the present invention has a flange portion 21 of the hub 2 having a substantially hat shape in the central portion, as shown in FIG.
And the inner peripheral edge portion 3 of the hollow disk-shaped medium (disk) 3
1 and 1 are bonded and fixed.

As shown in FIGS. 1 and 2, the magnetic disk 1 is coated with the adhesive 4 on the flange portion 21 of the hub 2 or the inner peripheral edge portion 31 of the medium 3 and then received in the magnetic disk manufacturing apparatus. It is manufactured by sandwiching the flange portion 21 and the inner peripheral edge portion 31 between the table 6 and the pressing tool 5 via the adhesive 4 and pressing and fixing.

Thus, in the method of manufacturing the disk cartridge of the present embodiment, as shown in FIG. 2, the limit of the pressing stroke in the pressing is determined based on the chucking surface 22 of the hub 2.

The method of manufacturing the disk cartridge according to the present embodiment will be further described with reference to the magnetic disk manufacturing apparatus. The pressing member 5 in the magnetic disk manufacturing apparatus has a shape similar to that of the hub 2 as shown in FIG. It is assumed to have a cup shape slightly larger than the hub 2.
The flange portion 21 of the hub 2 and the medium 3 are provided between the opening peripheral edge portion 52 of the pressing tool 5 and the flat pedestal 6.
The inner peripheral edge portion 31 is configured to be pressed.

The depth in the opening of the pressing tool 5 is
As shown in FIG. 2, when the bottom surface 51 in the opening comes into contact with the chucking surface 22 of the hub 2, the opening peripheral edge portion 52 of the pressing tool 5 is slightly smaller than the opening surface of the hub 2 (the flange portion). 21, the total thickness of each of the media 3, the adhesive 4, and the adhesive 4) is formed so as to be located closer to the chucking surface 22.

The hub 2 and the medium 3 are coated with the adhesive 4 on the flange portion 21 or the inner peripheral edge portion 31, and the flange portion 21 and the inner peripheral edge portion 31 are overlapped with each other with the adhesive agent 4 interposed therebetween. Then, the inner peripheral edge portion 31
Is pressed toward the flange portion 21 side by the opening peripheral portion 52 of the pressing tool 5 while crushing the adhesive 4 slightly, and the pressing stroke is such that the inner bottom surface 51 of the opening of the pressing tool 5 is the hub. It is configured to stop when it comes into contact with the second chucking surface 22.

In the method of manufacturing the disc cartridge of the present embodiment having the above-described structure, as shown in FIG. 2, the thickness of the adhesive 4 when it is pressed and fixed is determined by the coating amount of the adhesive 4 and the hub. 2 covers the variation in molding, and the distance h from the chucking surface 22 of the hub 2 to the surface of the medium 3 is always constant. Therefore, when the medium travels in the drive, the head touch of the magnetic head is good and an error occurs. There is no danger of this occurring.

It should be noted that the present invention is not limited to the above-described embodiment, and the limit of the pressing stroke in the pressing may be set with reference to the chucking surface of the hub.

[0017]

According to the disk cartridge manufacturing method of the present invention, the distance from the chucking surface of the hub to the media surface of the magnetic disk is always constant.
When the medium is running in the drive, the head touch of the magnetic head is good and there is no risk of error.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an example of a magnetic disk manufacturing apparatus configured to carry out a disk cartridge manufacturing method of the present invention.

2 is a partial cross-sectional view showing a state where a pressing stroke of a pressing tool is completed in the magnetic disk manufacturing apparatus shown in FIG.

FIG. 3 is a view corresponding to FIG. 1 of a magnetic disk manufacturing apparatus in a conventional disk cartridge manufacturing method.

FIG. 4 is a view corresponding to FIG. 2 of a magnetic disk manufacturing apparatus in a conventional disk cartridge manufacturing method.

FIG. 5 is a perspective view showing a magnetic disk manufactured by the method for manufacturing a disk cartridge of the present invention.

[Explanation of symbols]

 1 magnetic disk 2 hub 21 flange part 22 chucking surface 3 media 31 inner peripheral edge part 4 adhesive

Claims (1)

[Claims] 1. A magnetic disk to be housed in a cartridge, wherein an adhesive is applied to a flange portion of a substantially hat-shaped hub or an inner peripheral edge portion of a hollow disk-shaped medium, and then the flange portion and the inner peripheral edge portion are set to the above. A method of manufacturing a disk cartridge, which is manufactured by pressing and fixing with an adhesive, wherein a limit of a pressing stroke in the pressing is determined on the basis of a chucking surface of the hub.