JPH03187079A - Magnetic disk cartridge - Google Patents

Abstract

PURPOSE:To facilitate production by housing a disk into a liner formed to a bag shape and housing the disk of this state into upper and lower cases. CONSTITUTION:The cartridge is so assembled as to house the disk 3 between the lower case 1 and the upper case 4 after the disk is enveloped by the liner 22, by which the need for the equipment for welding the lower liner and the upper liner respectively separately to the lower case and the upper case is eliminated. Since the excess operation of inverting the upper case is eliminated, the entire part of the equipment for assembling is simplified and the smooth operation is eventually expected. The time when the disk is rested during the production process is shortened and further, the protection of the disk is possible and, therefore, the factors to generate defective disks are decreased and the ideal production process is realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic disk cartridge, and more particularly to a magnetic disk cartridge in which a magnetic disk is rotatably housed in a case body formed of an upper case and a lower case. Regarding.

2. Description of the Related Art FIG. 3 shows the structure of a conventional magnetic disk cartridge of this type (hereinafter abbreviated as "cartridge"). The figure is a partially cutaway perspective view showing the structure of a 3.6-inch micro-floppy digital cartridge (also referred to as a 90ff flexible p-digital cartridge).

In the figure, a lower liner 2 cut from acrylic non-woven fabric or the like is partially welded to the inner surface of a lower case 1 at several locations, and a recording medium for magnetically recording and reproducing information is placed on top of the lower liner 2. A thin sheet disc-shaped magnetic deinuk (hereinafter abbreviated as "deinuk") 3 is rotatably mounted. Furthermore, a Ni-liner 6 is welded to the inner surface of the upper case 4, as in the case of the lower case 1. This upper case 4 is combined with the lower case 1 and joined by ultrasonic welding.

The button 6 in the figure is a metal center core that is attached to the disk 3 and that provides a driving force to the disk by a drive shaft (not shown) of a disk drive device.

Problems to be Solved by the Invention In such a conventional configuration, the lower liner 2 and the upper liner 5 must be separately welded to the lower case 1 and the upper case 4, respectively. Two pieces of equipment are required: a case assembly machine. It is necessary to perform the troublesome work of placing the disk 3 on the lower case 1 and then inverting and attaching the upper case 4. Furthermore, if the disk 3 is left unattended for a long time during the manufacturing process, dust and dirt in the air will adhere to the disk 3, making it more likely to become a defective product.

The present invention takes the above-mentioned conventional problems into consideration and attempts to provide a magnetic disk cartridge that is easy to manufacture.

Means for Solving the Problems In order to solve this problem, the present invention provides that, instead of attaching the conventional lower liner and upper liner to the lower case and upper case separately, the bag-shaped liner is provided with disks 3.
In this state, the objects are stored in the upper and lower cases.

With this configuration, it is possible to assemble the disc by wrapping it in the liner and then storing it between the lower case and the upper case, and there is no need to invert the upper case and install it.

Embodiments Hereinafter, embodiments of the present invention will be explained with reference to the drawings. The same numbers will be used for parts corresponding to those in the conventional example, and explanations of omitted and duplicated contents will be omitted.

FIG. 1 is an exploded perspective view showing an embodiment of the present invention. In FIG. 1, a lower case 71 is attached to approximately four corners of a liner 22 cut out from a liner original fabric and folded in two. There is an 8H-K to be installed. The disc 3 is sandwiched between the liners 22 and welded at welding points (a) to (f) on the outside to form a bag shape. Next, connect the liner 22 to the columnar protrusion h-K of the lower case 1.
After fitting the upper case 4 and placing it on the lower case 1,
is combined with the lower case 1 and joined by ultrasonic welding. A space in which the liner 22 can be accommodated is created between the upper and lower cases in the columnar projection h-. The liner 22 can be moved or fixed between the upper and lower cases depending on the shape of this space.

Instead of attaching the hole H-K to the columnar projection h-k of the lower case 1, the button liner 22 may be fixed by being sandwiched between the lower case 71 and the upper case 4. In this case, it is preferable to provide some kind of position regulating means.

It is also possible to weld the lower case 1 or the upper case 1.

The liner 22 has been explained using an example in which the upper and lower sides are integrated and folded into two, but the lower liner 2 and the upper liner 6 are cut out separately as shown in FIG. The outer welding points may be welded to form a bag shape as shown in FIG.

Lower case 1 and upper case 4. The liner and the like may be welded by thermal welding or ultrasonic welding, or by adhesive or other methods. Further, the lower case 1 and the upper case 40 may be assembled by fitting or the like.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, in the manufacturing process, the disc is wrapped in a liner and then assembled by being housed between the lower case and the upper case. liner and top liner,
There is no need for equipment to separately weld the lower case and upper case. Furthermore, since the extra work of reversing the upper case is eliminated, the entire assembly equipment can be simplified and smooth operation can be expected. In addition, the time during which the disk is left unused during the manufacturing process is shortened, and since the disk can be protected by the liner, there are fewer causes of defective products, and an ideal manufacturing process can be realized.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a magnetic disk cartridge according to an embodiment of the present invention, Fig. 2 is an exploded view of the liner of the same embodiment before it is formed into a bag shape, and Fig. 3 is a conventional magnetic disk cart T. FIG. 1...lower case, h-k...column-shaped protrusion of lower case 1, 3...magnetic deinuk, 4.
... Upper case, 22 ... Liner, H-
K... Hole of liner 22, a A-f...
...Welding point of liner 22.

Claims (5)

[Claims] (1) A case body consisting of an upper case and a lower case, a magnetic disk rotatably housed inside the case body by an external drive shaft, and interposed between the case body and the magnetic disk. a liner, the liner being formed in a bag shape to enclose the magnetic disk. (2) The magnetic disk cartridge according to claim 1, wherein the liner has a hole, and the hole engages with a columnar protrusion provided in a space between the lower case and the upper case. (3) The magnetic disk cartridge according to claim 1, wherein the liner is sandwiched and fixed between the lower case and the upper case. (4) The magnetic disk cartridge according to claim 1, wherein the liner is fixed to the lower case or the upper case by welding. (5) The magnetic disk cartridge according to claim 1, wherein at least one edge of the upper and lower liners surrounding the magnetic disk is continuous.