JPH0454612Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to improvements in magnetic recording tape cassettes used in tape recorders, video cameras, etc.

<Prior art and its problems> Today, tape recorders, videos, etc. have become widespread,
A magnetic recording tape cassette is used for this purpose. The case of the cassette is made of plastic, and when the tape runs, it comes into contact with parts of the plastic case and can generate static electricity. Otherwise, it may cause an inconvenience such as distortion of the image or adhesion of dust. However, to date, there are no known products that take measures against this.

<Means for solving the problem> Fibers treated with antistatic treatment are known. In the past, there were products that were woven with metal filaments, but today there are products in which the fibers themselves are treated to prevent static electricity. It has been reported that this antistatic fiber is made by impregnating the fiber with a metal salt and then subjecting it to reduction treatment and special treatment. These fibers are formed into strings or fabric foils and used for various antistatic purposes. Such materials exhibit air discharge (corona discharge) due to the fluff of the conductive fibers and are therefore capable of discharging static electricity without the need for grounding. In addition, such fibers are commercially available in the form of cloth, felt, and can also be formed into paper, coated with adhesive on one side and protected with a release paper, and then attached to an object by removing the release paper if necessary. There are known products that can be used to prevent static electricity (for example, a product named "TECFA #4500" commercially available from Mitsubishi Rayon Co., Ltd.). The above-mentioned problems of magnetic recording tape cassettes are solved by the installation of such antistatic fibers in felt, cloth, or paper.

<Structure of the invention> The invention provides a magnetic recording tape cassette characterized in that air discharge type antistatic fiber felt, cloth, or paper is attached to a part of the case so as to be in contact with the magnetic recording tape. provide.

As used herein, the term magnetic recording tape cassette refers to any magnetic recording tape cassette, and specifically includes tape recorder and video tape cassettes.

As mentioned above, antistatic fiber cloth, felt, and paper are commercially available, and these can be used as appropriate.

<Specific Disclosure of the Invention> Next, the present invention will be described in detail regarding a tape cassette for a tape recorder with reference to the drawings.

FIG. 1 is a front view of a tape cassette of a tape recorder. There are four holes 14 on the front of the cassette. FIG. 2 is a side view of the cassette facing the magnetic head of the tape recorder. As seen in the figure, five windows are provided on the side surface on the magnetic head side, through which the magnetic tape 20 is exposed.

According to one preferred embodiment of the invention, as seen on the right side of FIGS. 1 and 2, one end 11 of a thin tape strip of adhesive antistatic paper is folded back and affixed to the tape itself; The remaining adhesive portion is adhered to the body of the cassette such that that portion contacts the magnetic tape.

In Figure 1, the antistatic paper tape is shown separated from the cassette body for ease of understanding.
In FIG. 2, it is shown in a pasted state.

Since the magnetic tape moves back and forth, it would be advantageous to apply antistatic paper tape to the opposite side as well, although this is not shown.

According to another embodiment of the invention, FIGS.
As seen on the left side of the figure and in FIG. 3, an antistatic fiber felt and cylindrical piece 13 is mounted in one of the holes 14 in contact with the magnetic tape.

By doing so, static electricity generated on the magnetic tape can be effectively removed.

Although the embodiment described above is for a tape recorder, those who understand this embodiment will readily implement the invention for video cassettes as well.

<Effects of the invention> The invention greatly reduces the problem of static electricity generation in magnetic recording tapes.

[Brief explanation of the drawing]

FIG. 1 is a front view of a tape cassette of a tape recorder. FIG. 2 is a side view of the cassette facing the magnetic head of the tape recorder.
FIG. 3 is a plan view of a cylindrical piece of antistatic fiber felt. In these figures, 1...the main body of a tape cassette, 10...a piece of antistatic paper tape, 13...a small cylindrical piece of antistatic fiber felt.

Claims (1)

[Scope of utility model registration request] A magnetic recording tape cassette characterized in that air discharge type antistatic fiber felt, cloth, or paper is attached to a part of the case so as to be in contact with the magnetic recording tape.