JPH0468708B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic tape cassette that can be applied to recording and reproducing apparatuses using rotary head devices such as video tape recorders and various information processing apparatuses.

Conventional configuration and its problems As is well known, a magnetic tape cassette for a video tape recorder is provided with a notch on one side of the cassette, through which the built-in magnetic tape can be pulled out to the outside of the cassette. There is.

Conventional magnetic tape cassettes have a rotatable lid on the front of the notch, which prevents the magnetic tape from inadvertently protruding from the notch to the outside of the cassette and causing damage, or if a person's hand is accidentally exposed to the magnetism during handling. It is made so that no one can touch the tape.

However, conventional magnetic tape cassettes do not take measures to prevent dust from adhering to the back surface of the magnetic tape in the notch, that is, the surface of the magnetic tape facing inside the cassette, or to prevent human hands from touching it during handling. was the majority. Further, in the case where such considerations were taken, the structure was complicated and there were problems in practical use, as shown in, for example, Japanese Patent Application Laid-open No. 57-147174.

Purpose of the Invention The purpose of the present invention is to solve the problems of the conventional magnetic tape cassette, to have an extremely simple structure, and to cover the front and back surfaces of the magnetic tape in the notch, so as to prevent the magnetic tape from dust and human beings. It is an object of the present invention to provide a magnetic tape cassette with a lid that can be protected from hands.

Structure of the Invention The magnetic tape cassette of the present invention is a magnetic tape cassette having a built-in reel wound with a magnetic tape and a notch that allows the magnetic tape to be pulled out to the outside. a first lid part that is supported and closed to cover a surface of the magnetic tape opposite to the reel in the notch; and a flexible lid part that covers a surface of the magnetic tape in the notch on the reel side. The device is configured to include a lid means having a second lid portion, and a regulating means provided in the notch portion for regulating the form of the second lid portion when the lid means is closed. When the lid means is closed, the first lid part can cover the magnetic tape and the front surface of the notch part, and the second lid part can cover the back surface of the magnetic tape in the notch part. , the magnetic tape can be completely protected from dust and human hands. Moreover, since the first lid part and the second lid part can be formed integrally, the structure of the lid means can be assembled and manufactured at low cost without much difference from conventional ones.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a magnetic tape cassette according to an embodiment of the present invention, and FIG. 2 is a side view thereof.
3 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 4 is a cross-sectional view of the rotary lid opened from the state shown in FIG. 3. FIG. 5 is a perspective view of the main parts of the magnetic tape cassette according to the embodiment of the present invention, and FIG. 6 is a perspective view of the rotating lid from the rear side.

In FIG. 1, the magnetic tape 3 wound on the supply reel 2 juxtaposed in the cassette body 1 passes through the first opening 4, the notch 5 and the second opening 6, and is wound onto the take-up reel 7. has been done. The first opening 4, the notch 5, and the second opening 6 can be opened and closed by a rotary lid 10 which is rotatably supported on the cassette body 1 by shafts 8 and 9. The rotating lid 10 has a front lid portion 11 that covers the front surface of the magnetic tape 3 in the cutout portion 5.
and a rear cover part 1 that covers the back surface of the magnetic tape in the notch part 5.
It has 2. The rear lid part 12 has flexibility, and as shown in FIG. The free end is regulated and deformed so as to come into contact with the front lid part 11. That is, when the rotating lid 10 is closed, the magnetic tape 3 in the notch 5 is surrounded by the front lid 11 and the rear lid 12, so it cannot be touched by human hands or dust can adhere to it. There's nothing to do.

When the rotating lid 10 is opened, the rear lid portion 12 that has been deformed
returns to its original shape as shown in FIG. Therefore, when the rotary lid 10 is closed again, the opening of the space formed by the front lid part 11 and the rear lid part 12 is large, so even if the magnetic tape 3 is slightly slack, the rotary lid 10 will not cut out. Accidents in which the magnetic tape 3 of the section 5 is caught and damaged can be drastically reduced. In the above embodiment, the rear lid part 12 and the rotating lid 10 are integrally formed, but the same effect can be obtained even if the rear lid part 12 is made of a thin plate or tape-like member and is fixed to the rotating lid 10. can get.

Effects of the Invention As is clear from the above description, the present invention provides a magnetic tape cassette which incorporates a reel wound with magnetic tape and has a notch that allows the magnetic tape to be pulled out to the outside. a first lid part that is pivoted to open and close and, when closed, covers a surface of the magnetic tape on the opposite side of the reel in the notch and a surface of the magnetic tape on the reel side in the notch part; A lid means having a flexible second lid portion for covering the lid, and a regulating means provided in the cutout portion for regulating the form of the second lid portion when the lid means is closed. Therefore, the magnetic tape in the notch can be protected from human hands and dust with a simple lid structure. Furthermore, when the rotating lid is open, the opening of the space formed by the front and rear lids becomes larger, so when the rotating lid is closed, the magnetic tape in the notch will loosen a little. An excellent effect can also be obtained in that it is possible to prevent an accident in which the rotating lid catches the magnetic tape and damages it.

[Brief explanation of drawings]

Fig. 1 is a plan view of a magnetic tape cassette according to an embodiment of the present invention, Fig. 2 is a side view of the same embodiment, Fig. 3 is a sectional view taken along the line - - of Fig. 1, and Fig. 4 is a view of the magnetic tape cassette with its lid opened. FIG. 5 is a cross-sectional view of the magnetic tape cassette according to an embodiment of the present invention, and FIG.
The figure is a perspective view of the rotating lid from the back. DESCRIPTION OF SYMBOLS 1... Magnetic tape cassette, 2... Supply reel, 3... Magnetic tape, 5... Notch, 7... Take-up reel, 10... Rotating lid, 11... Front lid, 1
2...Rear lid part, 13...Cam part.

Claims (1)

[Scope of Claims] 1. A magnetic tape cassette containing a reel wound with magnetic tape and having a notch that allows the magnetic tape to be drawn out, the notch being pivoted so as to open and close the notch, and a first lid portion that when closed covers a surface of the magnetic tape on the side opposite to the reel in the notch portion, and a flexible second lid portion that covers a surface of the magnetic tape on the reel side in the notch portion. 1. A magnetic tape cassette comprising: a lid means having a second lid portion; and a regulating means provided within the cutout portion for regulating the shape of the second lid portion when the lid means is closed. 2. The regulating means brings the free end of the second lid into substantially contact with the first lid so that the magnetic tape is contained between the first lid and the second lid when the lid is closed. 2. The magnetic tape cassette according to claim 1, wherein the magnetic tape cassette is configured to restrict the form of the second lid portion.