JPH02230582A - Magnetic disk cartridge and its manufacturing method - Google Patents

Abstract

PURPOSE:To simplify the whole of assembling facility by mounting the sponson part of an upper liner on a lower case or a lower liner outside the magnetic disk. CONSTITUTION:The sponson part extending to the outside of the magnetic disk is provided at the upper liner 5, and the sponson part is mounted on the lower case 1. Since the upper and lower liners 5 and 2 are formed in bag shape so as to wrap the magnetic disk 3 effectively at a lower case 1 side, the magnetic disk 3 is driven rotatably smoothly in the upper and lower liners 5 and 2 formed in the bag shape, and also, since the upper and lower liners 5 and 2 are mounted at the lower case 1 side, only one assembling machine of the liners 5 and 2 for the cases 1 and 4 is enough. Thereby, the facility can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic disk cartridge, specifically a magnetic disk cartridge in which a magnetic disk is rotatably housed in a case body formed by an upper case and a lower case, and the magnetic disk cartridge. This relates to a manufacturing method.

2. Description of the Related Art Conventionally, this type of magnetic disk cartridge (hereinafter simply referred to as a cartridge) has had a configuration as shown in FIG. FIG. 3 is a partially cutaway perspective view showing the structure of a 3.6-inch micro floppy disk (or 9011M flexible disk cartridge). 3, a lower liner 2 cut from acrylic non-woven fabric is partially welded to the inner surface of the lower case 71 at several locations, and information is magnetically recorded on the lower liner 2. A magnetic disk (hereinafter simply referred to as disk) 3, which is a thin disc-shaped recording medium to be reproduced, is rotatably mounted.

Also, an upper liner 5 is welded to the inner surface of the upper case 4, as in the case of the lower case 71. This upper case 74 is combined with the lower case 71 and joined by ultrasonic welding.

6 is a metal center core to which the disk 3 is pasted, and is inserted into the center hole of the lower case 71.

Problem to be Solved by the Invention However, 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, which requires a lower case assembly machine and an upper case assembly machine. Two pieces of equipment are required: 7 assembly machines. Another problem is that the troublesome work of reversing the upper game 74 after placing the disc 3 on the lower case 71 is required.

Means for Solving the Problems In order to solve the above-mentioned problems, the magnetic disk cartridge of the present invention is provided with an overhanging portion extending outward from the magnetic disk on the upper liner, and this overhanging portion is attached to the lower case or the lower liner. It is something.

In addition, the manufacturing method of the present invention includes mounting a magnetic disk on a lower liner attached to a lower case, and then applying an upper liner to cover the magnetic disk and converting the overhanging portion of the upper liner into a lower liner or a lower case. It is characterized in that it is attached to the case, and then the upper case is assembled to the lower case.

Function: In the magnetic disk cartridge of the present invention, the upper and lower liners are formed in a bag shape so as to effectively enclose the magnetic disk on the lower case side. It will be rotated smoothly.

Further, in the manufacturing method of the present invention, since the upper and lower liners 5 to 7 are attached to the lower case side, only one liner assembling machine for the case is required, and the equipment can be simplified. Further, since the upper case is assembled to the lower case after the upper and lower liners and magnetic disks are assembled, there is no need to invert the upper case, which has the advantage of easy assembly.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. Note that the same numbers are used for parts corresponding to those in the conventional example, and overlapping explanations are omitted.

FIG. 1 is a perspective view showing the internal structure of a cartridge lithography according to an embodiment of the present invention. In FIG. 1, a lower liner 2 is partially welded to the inner surface of a conventional lower case 71 at several locations, and then a disk 3 is rotatably placed on the lower liner 2. Furthermore, an upper liner 5 is placed on top of the upper liner 5 with overhanging parts 5a to 5e covering the disk 3 and the lower liner 2, and the overhanging parts 5 of the upper liner 5
A to 5e are partially welded to the lower case 1.6 /\
-/ Ru. In addition, instead of directly welding the projecting portions 5a to 6e of the upper liner 5 to the lower case 1, they may be welded to the portion of the lower liner 20 that is welded to the F case 1 and extends 9 to the outside of the disk 3. It is also possible to weld the upper liner 6 and the lower liner 2 to the lower case 71 at the same time. Alternatively, instead of welding, the liners 5 and 2 may be sandwiched and fixed between the lower case 1 and the upper case 4. Finally, the upper gear 4 is combined with the lower gear 71 and ultrasonically welded as in the conventional case.

Each member constituting the cartridge is assembled into the lower case 7 in the above order.
It is assembled through a series of steps of stacking one on top of the other.

FIG. 2 shows a cross-sectional view of the cartridge shown in FIG. 1 taken along arrow line A--A. In FIG. 2, a lower liner 2 and an upper liner 5, which sandwich a disk 3 from above and below, are welded to the lower case 1. The upper liner 5 is welded at a projecting portion 5b extending outward from the disk 3. f-g is the welding point of the upper liner 5, h-i.co is the welding point 7/\-noint of the lower liner 2.

Effects of the Invention As described above, according to the present invention, the upper liner can be attached to the lower case or the lower liner without increasing the material cost due to the simple structure, and the liner can be attached to the upper case separately. No additional equipment is required for assembly. Furthermore, since there is no need for the extra work of reversing the upper case, the entire assembly equipment can be simplified and smooth operation can be expected.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the internal structure of a magnetic disk cartridge according to an embodiment of the present invention, FIG. 2 is a partial sectional view of the main parts thereof, and FIG. 3 is a perspective view showing the structure of a conventional magnetic disk cartridge. be. 1...Lower case, 2...Lower liner,
3...Magnetic disk, 5...Upper liner,
5a to 5e... overhanging portions.

Claims (2)

[Claims] (1) A lower case, a lower liner attached to the inner surface of the lower case, a magnetic disk rotatably placed on the lower liner, and a magnetic disk extending outward from the magnetic disk, covering the magnetic disk. An upper liner having an overhang, and an upper case that covers the upper liner and is combined with the lower case, the overhang of the upper liner being attached to the lower case or the lower liner outside the magnetic disk. A magnetic disk cartridge featuring: (2) the step of attaching the lower liner to the inner surface of the lower case;
a step of rotatably mounting a magnetic disk on a lower liner attached to the lower case, a step of applying an upper liner to cover the magnetic disk assembled to the lower case, and a step of mounting the magnetic disk on the lower liner attached to the lower case; The method is characterized in that the step of attaching the projecting portion of the upper liner to the lower case or lower liner outside the magnetic disk, and the step of attaching the upper case to the lower case to which the magnetic disk and upper and lower liners are attached are performed in sequence. A method of manufacturing a magnetic disk cartridge.