JPH0516987A - Cassette case - Google Patents

Abstract

PURPOSE:To reduce the possibility of cassette dropping out due to the dust contamination by causing the static electricity produced on the cassette to discharge through a discharge sheet in the cassette case. CONSTITUTION:A discharge sheet 6 is formed by applying to the sheet material a thin coat of an electrically conductive substance as in the form of a needle (e.g. that which has the carbon or acrylic fiber impregnated with copper sulfate dispersed in a binder). A disk cassette 1, together with the discharge sheet 6 folded over both its side faces 1a in contact therewith, is inserted into a cassette case 4 from its opening 5, whereby the static electricity produced on both the side faces 1a thereof can be neutralized and discharged instantaneously by the discharge sheet 6 without grounding. This can reduce the possibility of the cassette dropping out due to the dust contamination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage case for storing a disk cassette, a tape cassette, or the like containing a recording medium such as a magnetic disk or a magnetic tape.

[0002]

2. Description of the Related Art Conventionally, in a disk cassette or a tape cassette, if dust adheres to a magnetic disk or a magnetic tape, it may cause dropout during recording or reproduction. Therefore, these cassettes are stored in a storage case made of plastic so that dust is unlikely to adhere to the magnetic disk or the magnetic tape.

[0003]

However, the disk cassette and the tape cassette are made of a plastic material in which the static electricity is easily charged due to static electricity during normal use, carrying and the like. If it is stored in the storage case as it is, the electric charge of the cassette will not be attenuated, and the dust inside the storage case will easily adhere to the cassette. Easy to adhere to.
Then, there is a problem that the dust adhering to the cassette eventually enters the cassette and adheres to the magnetic disk or the magnetic tape, causing dropout.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a storage case for a cassette in which static electricity charged in the cassette can be discharged in the storage case.

[0005]

A cassette storage case of the present invention for achieving the above-mentioned object is a discharge case for discharging static electricity charged in the cassette in a storage case of a cassette containing a recording medium. The seat is stored in the storage case.

[0006]

In the storage case of the cassette of the present invention constructed as described above, the static electricity charged in the cassette can be discharged by the discharge sheet in the storage case.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment applied to a storage case for a disc cassette according to the present invention will be described below with reference to the drawings.

First, as shown in FIGS. 1 and 2, reference numeral 1 is a disk cassette such as a 3.5-inch MFD, which is a cassette for accommodating a magnetic disk 2 which is a recording medium and is used for opening and closing a head insertion opening. The shutter 3 and the like are attached.

Reference numeral 4 denotes a transparent or semi-transparent storage case made of plastic, and has an opening 5 for loading and unloading the cassette at one end.

Reference numeral 6 is a discharge sheet, which is folded into a substantially U-shape and is housed together with the disk cassette 1 in a housing case 4 in a state of being in contact with both surfaces 1a of the disk cassette 1. Here, as the discharge sheet 6, for example, a sheet which also serves as a release paper of the label 7 is shown, but the discharge sheet 6 may be a card or the like which is a member different from the label 7.

The discharging sheet 6 has a function of neutralizing and discharging the static electricity charged on the surface of the disk cassette 1, and for example, Soldion (trademark of Toyo Rayon Co., Ltd.), ASE brush. (Trademark of Funakoshi Yakuhin Co., Ltd.) and Thunderon SS-N (trademark of Japan Silkworm Dyeing Co., Ltd.) are common.

The discharge sheet 6 is, for example, thinly applied on a sheet material by acicular conductive material (for example, carbon fiber, acrylic fiber impregnated with copper sulfide fiber dispersed in a binder). When the discharge sheet 6 is also used as the release paper for the label 7, a small amount of silicone resin may be added to the conductive substance + binder to improve the release property.

Then, as shown in FIG. 2, the discharge sheet 6 and the disc cassette 1 are put together in the storage case 4 through the opening 5 with the discharge sheet 6 being in contact with both surfaces 1a of the disc cassette 1. If it is inserted into and stored in, the static electricity charged on both surfaces 1a of the disk cassette 1 can be instantly neutralized and discharged by the discharge sheet 6 without grounding.

That is, the principle of the discharge is as shown in FIG. 3, and the tip of the conductive fiber 6a of the discharge sheet 6 is in contact with the surface 1a of the disk cassette 1, so that the surface 1a of the disk cassette 1 is discharged. A negative electric charge, which is opposite to the positive electric charge charged in the negative direction, is induced at the tip of the conductive fiber 6a. This is because ions are created using electrostatic energy. Then, the negative charges collected at the tips of the conductive fibers 6a are separated and move toward the surface 1a of the disk cassette 1, and the positive charges and the negative charges are combined on the surface 1a to neutralize the charges. . By repeating this, the surface 1a of the disc cassette 1 is
The static electricity charged on the battery is completely discharged.

Therefore, if the disk cassette 1 whose surface 1a is charged with static electricity is stored in the storage case 4, the static electricity on the surface 1a of the disk cassette 1 can be instantly discharged by the discharge sheet 6. When dust inside the storage case 4 adheres to the disc cassette 1 or when the disc cassette 1 is taken out from the storage case 4,
It is possible to prevent external dust from adhering to the disc cassette 1 as much as possible. Since dust is unlikely to adhere to the disc cassette 1, it is possible to prevent dust from entering the disc cassette 1 and adhering to the magnetic disc 2 to cause dropout during recording and reproduction.

Since the discharge sheet 6 can also serve as the release paper for the label 7, the number of parts can be reduced and the cost can be reduced.

As described above, one embodiment of the present invention has been described.
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention.

The present invention is not limited to the storage case of the disk cassette, but can be applied to the storage case of various cassettes which store various recording media such as tape cassettes.

[0019]

Since the cassette storage case of the present invention is constructed as described above, the following effects can be obtained.

Since the static electricity charged in the cassette can be discharged by the discharge sheet in the storage case, the dust in the storage case adheres to the cassette, or the external dust is discharged to the cassette when the cassette is taken out from the storage case. Adhesion can be prevented as much as possible, and dropout caused by dust adhesion can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a storage case of a cassette according to an exemplary embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same cassette stored state.

FIG. 3 is an enlarged cross-sectional view for explaining the electrostatic discharge principle of the above.

[Explanation of symbols]

 1 disk cassette (cassette) 2 magnetic disk (recording medium) 4 storage case 6 discharge sheet

Claims (1)

Claim: What is claimed is: 1. A cassette containing a recording medium, wherein a discharge sheet for discharging static electricity charged in the cassette is contained in the cassette. Storage case.