JPH01267884A - Magnetic tape with demagnetization mechanism - Google Patents

Abstract

PURPOSE:To name unnecessary rewinding for reproducing and demagnetizing and to record for the demagnetization by providing a permanent magnet and a magnetic shield material on the part of the travelling track of a magnetic tape. CONSTITUTION:A screwdriver is inserted into a screwdriver groove 6 of a winding part 5 and the stopper part 4 of a magnetic shield material 2 is removed from a pin 3 by turing to the right. Further, the magnetic shield material 2 is wound by the winding part 5, when the stopper part 4 hits the tip of a guide part 7, the guide part 7 is opened a little, the magnetic shield material 2 can be completely wound, since there is a convex part for the reverse protection of the guide part 7, the reverse is prevented after the winding. Thus, the demagnetization of a magnetic tape 9 can be executed by the exposure of a directional magnet 1. Thus, the batch of the reproduction is easily executed, when the magnetic tape in which the information of a secret and the like is recorded is scrapped, the demagnetization is easily attained by the fast forwarding action of an ordinary magnetic tape device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic tape, and particularly to a magnetic tape with a degaussing mechanism that has a mechanism for demagnetizing recordings on the magnetic tape.

[Conventional technology]

Conventionally, a magnetic tape device is provided with a degaussing head, and the magnetic tape is demagnetized by this degaussing head. For this reason, magnetic tapes are not equipped with a degaussing mechanism. Fifth
The figure shows the structure of a conventional cassette tape A.

[Problem to be solved by the invention]

The problem to be solved by the present invention is that when it is necessary to play back only - degrees, the degaussing function of the magnetic tape using the degaussing head of a conventional magnetic tape device does not allow the degaussing function of the magnetic tape to be played back and demagnetized by - degrees. It is necessary to record for

Therefore, an object of the present invention is to provide a magnetic tape with a degaussing mechanism that eliminates the above-mentioned drawbacks.

[Means to solve the problem]

The magnetic tape with a degaussing mechanism of the present invention includes a permanent magnet and a magnetic shielding material in a part of the traveling path of the magnetic tape, which includes a feed reel and a take-up reel.

〔Example〕

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows how the degaussing mechanism B part is incorporated into the cassette tape A. The degaussing mechanism B section is installed on the tape winding side during playback.

FIG. 2 is an enlarged view of part B of the degaussing mechanism. During normal recording and reproduction, the magnetic shielding material 2 covers the directional magnet 1 and blocks the magnetic force.

When using this mechanism, the stopper part 4 of the magnetic shielding material 2 is removed from the pin 3 by inserting a screwdriver into the driver groove 6 of the winding part 5 and turning it clockwise. By further winding, the magnetic shielding material 2 is wound around the winding part 5, and when the stopper part 4 hits the tip of the guide part 7, the guide part 7 is pushed open slightly in the direction of the arrow, and the magnetic shielding material 2 is completely wrapped. Even after winding up, there is a convex part on the guide portion 7 for preventing backward movement, so that the winding does not reverse. By exposing the directional magnet 1, the magnetic tape 9 can be demagnetized.

FIG. 3 shows how the degaussing mechanism C section is assembled into the cassette tape A. The degaussing mechanism C section is installed on the tape winding side during playback.

FIG. 4 is an enlarged view of part C of the degaussing mechanism. During normal recording and reproduction, the directional magnet is positioned away from the magnetic tape surface, and the magnetic force is blocked by the magnetic shielding material 2. .

When using this mechanism, insert a screwdriver into the driver groove 6 of the directional magnet 1 and turn it clockwise to unlock the stopper part 4 of the magnetic shielding material 2 and move the directional magnet 1 toward the magnetic tape 9 side. Rotate and move. The directional magnet 1 is rotated until the stopper part 4 of the magnetic shielding material 2 is locked.

By exposing the directional magnet 1, the magnetic tape 9 can be demagnetized.

〔Effect of the invention〕

As described above in detail, according to the present invention, it is possible to easily reproduce the -degree to an individual or a third party, and it can be utilized for maintaining secrets. Furthermore, when discarding a magnetic tape on which confidential information is recorded, it is possible to easily demagnetize it by fast-forwarding a normal magnetic tape device. Furthermore, when the degaussing mechanism is not in use, it is extremely practical in that it can be handled like a conventional magnetic tape.

[Brief explanation of the drawing]

1 and 2 are a perspective view and an enlarged view showing one embodiment of the present invention, FIGS. 3 and 4 are a perspective view and an enlarged view showing two embodiments, and FIG. 5 is a conventional cassette tape. FIG. A...Cassette tape, 1...Directional magnet, 2...Magnetic shielding material, 3...
Pin, 4... Stopper part, 5... Winding part, 6... Driver groove, 7...
Guide portion, 8...roller, 9...magnetic tape. Agent Patent Attorney Oto Uchihara

Claims (1)

[Claims] A magnetic tape with a degaussing mechanism, characterized in that a permanent magnet and a magnetic shielding material are provided in a part of the running path of the magnetic tape, which is equipped with a sending reel and a take-up reel.