JPH0643873U - Disc cartridge - Google Patents

Abstract

(57) [Summary] [Purpose] The magnetic media and center core of a disk cartridge can be easily bonded and fixed at low cost. [Structure] In a disk cartridge in which a magnetic medium 4 having a center core 6 attached to the center thereof is rotatably housed in a case 3, a hot melt ring 21 is attached to the overlapping surface of the center core 6 of the magnetic medium 4, If the center core 6 is fitted into the hole 5 and heat-treated, the hot melt ring 21 is softened, and the center core 6 can be adhesively fixed to the magnetic medium 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk cartridge, and more particularly, to a structure for fixing a magnetic medium and a center core housed in a case.

[0002]

[Prior art]

 FIG. 5 exemplifies a general structure of a disk cartridge, which is a thin rectangular case 3 in which an upper shell 1 and a lower shell 2 made of hard plastic are integrally joined in a fitted shape, and this case. 3 and a magnetic medium 4 housed in the magnetic medium 4. The magnetic medium 4 is fixed by fitting a center core 6 into a hole 5 provided at the center of the magnetic medium 4, and the center core 6 is freely rotatable in the central hole 7 of the lower shell 2. The center core 6 is provided with a spindle insertion hole 8 and a drive pin insertion hole 9, and the upper shell 1 and the lower shell 2 are provided with head insertion openings 10 and 11.

In the process of assembling the disc cartridge as described above, it is necessary to fit and fix the center core 6 in the hole 5 of the magnetic medium 4.

Conventionally, as shown in FIGS. 5 and 6, the center core 6 is fixed to the magnetic medium 4 by using a ring 12 formed by using a double-sided adhesive, and a hole 5 of the magnetic medium 4 is formed in an assembling process. After sticking the ring 12 on the periphery or the flange 13 of the center core 6, the magnetic media 4 and the center core 6 are adhered, or the magnetic media 4 or the center core 6 is applied with a dispenser or the like and pressure-bonded. is doing.

As shown in FIG. 7 and FIG. 8, the ring 12 using the double-sided adhesive described above applies double-sided adhesive to the surface of the strip-shaped separator 14 and then adheres the double-sided adhesive and the separator 14 to each double-sided adhesive. A punching hole 15 having a diameter smaller than that of the double-sided adhesive is punched in the portion to which the agent is applied, the ring 12 is formed by the double-sided adhesive left in the separator 14, and a release paper 16 is formed on the surface of the separator 14 on which the ring 12 is formed. It is composed of layers.

[0006]

[Problems to be solved by the device]

 However, if the ring 12 made of double-sided adhesive is attached to either the magnetic medium 4 or the center core 6 during the assembly process, the ring 12 will adhere to other parts unless the other adhesive surface is adhered quickly. However, there is a problem that the assembly process is hindered.

Further, in the manufacturing process of the ring 12, most of the applied double-sided adhesive is punched out and discarded, which is very wasteful in terms of resources and economy. There is variation in thickness and dimensions due to shrinkage, and when an adhesive is applied, it deforms during curing, causing a quality problem. Therefore, the object of the present invention is to provide a disk cartridge which is free from adhesion of other parts during the assembling process, and in which ring formation is resource-saving and economically economical, and which has further improved quality. I am trying.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention adopts a configuration in which a hot melt ring is attached to the overlapping surface of the magnetic media with the center core.

[0009]

[Action]

 If a hot melt ring is attached to the surface of the magnetic media that overlaps with the center core that is attached to it, and the heat treatment is performed with the center core fitted in the hole of the magnetic media, the hot melt ring will soften and the center core will be attached to the magnetic media. Can be glued and fixed. The hot melt ring was attached to the magnetic medium by direct screen printing or transfer.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 2 to 4 of the accompanying drawings. Since the basic structure of the disk cartridge is the same as that of the conventional example shown in FIG. 5, the same parts are designated by the same reference numerals and will not be described.

The present invention has a structure in which a hot melt ring 21 is attached to the magnetic medium 4 on the overlapping surface of the magnetic medium 4 and the center core 6 attached to the hole 5 of the magnetic medium 4.

Specifically, the hot melt ring 21 is directly attached to the surface of the magnetic medium 4 by screen printing or the like as shown in FIG. 2 (A), or the hot melt ring 21 is attached to the surface of FIG. 2 (A). As shown in the above, the magnetic media 4 can be mounted on the surface around the hole 5 by transfer.

Next, as shown in FIG. 2B, the center core 6 is fitted into the hole 5 and heat treatment is performed with the hot melt ring 21 sandwiched between the magnetic media 4 and the flange portion 13 of the center core 6. Then, the hot melt ring 21 is softened, and the center core 6 can be bonded and fixed to the magnetic medium 4.

FIG. 3 and FIG. 4 show a concrete manufacturing state in which the hot melt ring 21 is transferred onto the magnetic medium 4, and the punching holes 23 are provided at a constant interval in the release paper 22 having releasability. A hot melt ring 21 is formed around each punched hole 23 on the surface of the release paper 22 by means of screen printing or the like.

The hot melt ring 21 on the release paper 22 may be transferred from the release paper 22 to the surface of the magnetic medium 4 and attached. Since the hot melt ring 21 is directly formed into a ring shape by screen printing, there is no waste of the forming material, it is economical, and a ring with good dimensional accuracy can be formed.

Further, since the hot melt ring 21 does not have adhesiveness when heat is not applied, other members will not adhere even if it is attached to the magnetic medium 4 in advance during the assembly process of the disk cartridge, and accordingly, The assembly process can be performed without any problems.

The hot melt ring 21 can be exemplified by a modified olefin resin. The disk cartridge of the present invention has the above-described structure, and as shown in FIG. 2A, the hot melt ring 21 is attached in advance around the hole 5 on the surface of the magnetic medium 4, and the hole 5 of the magnetic medium 4 is attached. When the heat treatment is performed with the center core 6 fitted to the core core 6, the center core 6 can be bonded and fixed to the magnetic medium 4 by softening the hot melt ring 21.

[0018]

[Effect of device]

 As described above, according to the present invention, since the hot melt ring is used to bond and fix the magnetic media and the center core in the disk cartridge, the adhesive force does not occur unless the hot melt ring is heated. However, the other parts do not adhere and the disk cartridge can be assembled without any problems. The quality can be improved.

Further, the hot melt ring can be directly formed into a ring shape by screen printing, and there is no waste of material, which is advantageous in terms of resources and economy. Further, since the hot melt ring can be directly formed into a ring shape by printing, the dimensional accuracy can be improved, and the separator for printing the hot melt ring can be reused, and the thickness of the hot melt ring can be made constant to improve the quality. Moreover, if the hot melt is colored with a dye, it has the advantage of simplifying visual inspection or inspection by measuring equipment.

Incidentally, when the hot melt ring of the present invention is used for adhesion, the adhesion is extremely good. This is because when the hot melt ring is pressed by the upper and lower shafts, the adhesive performance is improved by the thickness of the hot melt even if there are slight irregularities on the adhesive surface.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a disk cartridge according to the present invention.

FIG. 2A is an enlarged sectional view showing a state in which a hot melt ring is attached to a magnetic medium, and FIG. 2B is an enlarged sectional view in which a center core is bonded to the magnetic medium.

FIG. 3 is a perspective view of a tape having a hot melt ring formed thereon.

FIG. 4 is an enlarged vertical sectional view of the above.

FIG. 5 is an exploded perspective view showing a conventional disc cartridge.

FIG. 6 is an enlarged cross-sectional view in which a center core is bonded to the magnetic medium of the above.

FIG. 7 is a perspective view of a tape having a double-sided adhesive ring formed thereon.

FIG. 8 is an enlarged vertical sectional view of the above.

[Explanation of symbols]

 3 Case 4 Magnetic Media 5 Hole 6 Center Core 21 Hot Melt Ring 22 Release Paper 23 Punching Hole

Claims (3)

[Scope of utility model registration request] 1. A disk cartridge in which a magnetic medium having a center core attached to the center thereof is rotatably accommodated in a case, wherein a hot melt ring is attached to an overlapping surface of the magnetic medium with the center core. cartridge. 2. The disk cartridge according to claim 1, wherein the hot melt ring is directly attached to the magnetic medium by screen printing. 3. The disk cartridge according to claim 1, wherein the hot melt ring is attached to the magnetic medium by transfer.