JPH03108175A - Disk cartridge - Google Patents

Abstract

PURPOSE:To prevent a label from peeling off under the normal using/ preservation condition and to enable the whole label to be easily peeled off if need arise by forming a fine zone in surface roughness and a coarse zone on a label sticking surface of a cartridge case. CONSTITUTION:A label sticking part 10 is formed slightly larger than a required label in size, and its whole surface is formed into a rough surface. Then, the surface roughness of an outer circumferential part 10a out of the label sticking surface is formed finer than the surface roughness of an inner circumferential part 10b. Consequently, since the label is firmly stuck to the surface of the cartridge case 2 in the fine surface roughness zone, i.e. the outer circumferential part 10a, peeling resistance is high in this zone, so that the label is prevented from peeling off from its outline part under the normal using circumstance and preservation circumstance. On the other hand, in the coarse surface roughness zone, i.e. the inner circumferential part 10b, the label is comparatively weakly stuck to the surface of the case 2, so that the label easily is peeled off by giving peel strength artificially.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk cartridge, and particularly to the configuration of a label attachment surface formed on the surface of a cartridge case.

[Conventional technology]

Usually used in disk cartridges that store disk-shaped recording media such as magnetic disks and optical disks.

A label on which the manufacturer's name, model, etc. of the disk cartridge is printed is attached.

Labels are made by uniformly applying adhesive to the back of label paper on which predetermined information is printed; If a peeling force is applied to the surface, the entire surface can be peeled off cleanly.
Must be able to respond to requests such as replacing labels with new ones.

If the label pasting surface of the cartridge case is made smooth, the adhesion between the cartridge case and the label will become too high, and when an attempt is made to peel it off manually, the label paper will cause delamination, causing adhesive and label paper to separate. A part of the cartridge remains on the cartridge case and cannot be removed cleanly.

From this point of view, disk cartridges have been proposed in which the label pasting surface of the cartridge case is formed into a rough surface to reduce the contact area between the cartridge case and the adhesive, thereby improving the ease of label peeling.

[Problem to be solved by the invention]

However, the adhesion strength (peeling resistance) of a label varies greatly depending on subtle variations in environmental conditions at the time of adhesion, adhesion pressure, and surface roughness of the adhesion surface. If the adhesive is formed on a rough surface, it is difficult to achieve the ideal application conditions as described above.

In particular, if the surface roughness of the labeling surface is excessive,
If the entire surface to which the label is attached is formed to have a uniform surface roughness, peeling will not stop at a limited portion of the label's contour, but will occur over a large area. For this reason, for example, if the peeling occurs due to the heat when inserted into a disk drive, the peeled pieces may adhere to the components inside the disk drive, destroying the disk drive, or making it impossible to remove the disk cartridge. This may lead to problems such as.

The present invention has been made in order to eliminate the drawbacks of the prior art, and is designed to prevent the label from peeling off under normal use and storage conditions, and to allow the label to be removed relatively easily when necessary. The object of the present invention is to provide a disk cartridge that can be completely peeled off.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a disk cartridge in which a label is pasted on the surface of a cartridge case, in which a region with a small surface roughness and a region with a large surface roughness are formed on the label pasting surface of the cartridge case. [Function] According to the above means, the label is firmly attached to the surface of the cartridge case in areas where the surface roughness is small, so peeling resistance is high, and peeling from the contour part that occurs under normal use and storage environments is prevented. Peeling of the label can be prevented.

On the other hand, in areas where the surface roughness is large, the label is relatively weakly attached to the surface of the cartridge case, so the label can be peeled off cleanly by applying an artificial peeling force.

Furthermore, since we have formed regions with small and large surface roughness on the label application surface, the area where the label is firmly stuck is smaller compared to when the surface roughness is reduced for the entire label application surface. . Therefore, by applying a relatively small peeling force, the strongly adhered portion can be peeled off, making the label paper less likely to tear.
The entire label can be peeled off cleanly.

Therefore, it is possible to provide a disk cartridge that has the contradictory properties of not peeling off under normal use and storage conditions, but easily peeling off when intentionally used.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a top view of the disk cartridge according to the first embodiment with the label removed, Fig. 2 is a bottom view of the disk cartridge, and Fig. 3 is an enlarged sectional view of the main parts of the disk cartridge with the label attached. be.

As shown in these figures, the disk cartridge of this embodiment has a shutter at the front end (the insertion end into the disk drive device) A of a hard plastic cartridge case 2 in which a disk-shaped recording medium 1 is rotatably housed. 3 is slidably attached.

The cartridge case 2 consists of an upper case 4 and a lower case 5, which are formed into a generally shallow dish shape and have approximately the same shape and size. Components such as the recording medium 1 are stored.

A shutter setting part 6 for housing the shutter 3 is recessed in a portion # extending from the front end A of the upper case 4 and the lower case 5 to the middle of the surface, and head insertion holes 7, 8 are formed approximately in the center thereof. has been established. In addition, a label on which the manufacturer's name, model, etc. of the disc cartridge is printed is printed on the part from the rear end B of the upper case 4 to the middle of the surface, and on the rear end B of the lower case 5 and its vicinity. A label attaching portion IO for attaching the label 9 is recessed. In addition, a spindle hole 12 is provided approximately at the center of the lower case 5 for allowing a center hub 11 set at the center of the disk-shaped recording medium 1 to face the outside.

The label pasting section 10 is formed to have a size slightly larger than the desired label 9, and its entire surface (label pasting surface) is formed into a rough surface. The surface roughness of the outer circumferential portion 10a, which is indicated by hatching, of the surface to which the label is attached is as follows.

The surface roughness is smaller than that of the inner peripheral portion Job. The rough surface is formed by subjecting the molds for molding the upper case 4 and the lower case 5 to grain processing or satin drawing processing,
The surface roughness inside each portion 10a, 10b is substantially uniform.

Surface roughness of the outer peripheral portion 10a of the label pasting surface.

The surface roughness of the inner peripheral portion 10b can be adjusted as appropriate depending on the type of adhesive applied to the label 9, but in the case of polyvinyl acetate emulsion, which is generally used as a adhesive for labels. , for the outer peripheral portion 10a, the surface roughness (maximum height according to JIS standard) is Rmax, = 5 to 1
5 μm, and the surface roughness of the inner peripheral part is Rmax,
It is preferable to adjust the thickness to 20 to 30 μm.

Further, the width W of the outer circumferential portion 10a can be set as appropriate depending on the size of the label 9, etc., but in the case of a label attached to a 3.5-inch disk cartridge, approximately 4 to 6 mm is appropriate. It is.

As shown in FIG. 3, the label 9 is made by applying a glue 14 to a uniform thickness on the opposite printing surface of a waterproof or plastic-coated label paper 13.

The shutter 3 includes two face plates 15.16 that cover the surface of the upper case 4 and the surface of the lower case 5, and these face plates 15.1.
The shutter opening hole 18.6 is formed in a substantially U-shape with a connecting piece 17 connecting one end of the shutter opening hole 18.6, and the head insertion hole 7.8 is opened near one side of the face plate 15.
19 have been established.

FIG. 4 shows the results of an adhesion strength test for a disc cartridge according to the present invention and a conventional disc cartridge.

A 3.5-inch magnetic disk cartridge was used as the sample. Other conditions for each sample are as follows.

Sample 1: outer peripheral portion 10a of label attachment surface 10
The surface roughness of the inner peripheral portion 10b is R'max, = 25 tt.
It is formed in m.

Sample 2...Outer peripheral part 10a of label pasting part 1O
The surface roughness of the inner peripheral portion 10b is formed to be Rmax, = 0 μm, and the surface roughness of the inner peripheral portion 10b is formed to be Rmax, = 25 μm.

Sample 3: outer peripheral portion 10a of label attachment surface 10
The surface roughness of the inner peripheral portion 10b is formed to be Rwax, = 15 μm, and the surface roughness of the inner peripheral portion 10b is formed to Rmax, = 25 μm.

Sample 4: Sample 4 is a conventional product, and the surface roughness of the entire label attachment surface is Rmax = 25 μm.

In the test, as shown in FIG. The label 9 was attached while applying a pressing force of 1 kg, and one end of the label 9 was folded back parallel to the lower case 5 and pulled.

The maximum tensile force required to peel off the label 9 was measured.

As shown in Figure 4, five points were tested for each sample, and the original products (Samples 1, 2.3) required a greater tensile force to peel off the label 9 than the conventional product (Sample 4). It can be seen that the peeling resistance is improved compared to the conventional product. Furthermore, it can be seen that the original product has less variation in tensile force and is superior to the conventional product in terms of reliability.

FIG. 6 shows the environmental resistance test results of the disk cartridge according to the present invention and the conventional disk cartridge. The sample was the same as that used in the pasting strength test.

As shown in this figure, high temperature and high humidity test (test number 1.2)
When conducting a heat cycle test (test number 4), label peeling occurred in 1 out of 5 cases with the conventional product, but no peeling occurred with the original product, and the original product had poor environmental resistance. It turns out that it is also excellent.

In addition, during the test, labels with peeling or lifting in a small part of the label were also judged as "Peeling J".

Next, a second embodiment of the present invention will be described based on FIGS. 7 and 8.

FIG. 7 is a top view of the disk cartridge according to the second embodiment, and FIG. 8 is a bottom view of this disk cartridge. In these figures, the same members and portions as shown in the above-mentioned FIGS. 1 to 3 are denoted by the same reference numerals and the description thereof will be omitted to avoid duplication.

As shown in these figures, the disk car 1-
In the ridge, the outer peripheral portion 1 of the label application surface 10. O
Not only a, but also the rear of the upper case 4 @ the part 10c along B
, and also in the portion 10d along the rear end B of the lower case 5,
A region with low surface roughness is formed. Part 10
The surface roughness of c, l Od is formed in the same manner as the outer peripheral portion 10a described above.

The disk car 1 edge of this example has an increased area of 5 small surface roughness compared to the first example, so the label 9
The 4'J Al resistance can be partially improved.

5. The present invention is characterized in that a region with a small surface roughness and a region with a large surface roughness are formed on the label pasting surface of the cartridge case, and the arrangement of the region with a small surface roughness and the region with a large surface roughness is However, the present invention is not limited to those listed in the above embodiments.

Further, the configurations other than the label attachment surface, such as the cartridge case, the shutter, and the configuration of the disk-shaped recording medium housed in the cartridge case, can be arbitrarily designed regardless of the above-described embodiments.

〔Effect of the invention〕

As explained above, in the disk cartridge of the present invention, a region with a small surface roughness and a region with a large surface roughness are formed on the label pasting surface of the cartridge case.
The label does not peel off under storage conditions and has excellent durability and reliability. Furthermore, when a force such as 2'l&i is applied to the label, the label can be peeled off with relative ease and cleanliness, making it possible to reapply the label.

[Brief explanation of drawings]

The drawings are all embodiments of the present invention, and FIG. 1 is a top view of a disk cartridge according to the first embodiment, FIG. 2 is a bottom view thereof, and FIG. 3 is an enlarged cross-sectional view of a main part thereof. FIG. 4 is a graph showing the results of the adhesion strength test conducted on the disk cartridge according to the first embodiment, FIG. 5 is an explanatory diagram showing the test method, and FIG. It is a graph diagram showing the results of an environmental resistance test. FIG. 7 is a top view of the disk cartridge according to the second embodiment, and FIG. 8 is a bottom view thereof. l... Disc-shaped recording medium, 2... Cartridge case, 4... Upper case, 5...
...Lower case, 9...Label, 10...
・・Label pasting surface, 10 at l Ocy ] O
d... Area with small surface roughness, 10b...
... Area with large surface roughness, 13 ... Label paper, 14 ... Glue. Figure 1 Figure 6 Figure 4 Figure 7 Figure 8 Figure 5

Claims (3)

[Claims] (1) A disk cartridge comprising a label affixed to the surface of a cartridge case, characterized in that the label affixing surface of the cartridge case is formed with a region with a small surface roughness and a region with a large surface roughness. (2) The disk cartridge according to claim 1, wherein the surface roughness of at least an area to which an outline of the label is attached of the label attachment surface is smaller than that of other parts. (3) In any one of claim 1 and the description, the surface roughness of the region where the surface roughness is small is Rmax. =5~15
μm, and the surface roughness of the area where the surface roughness is large is Rmax. A disk cartridge characterized in that it is formed to have a diameter of 20 to 30 μm.