JPH05198130A - Tape cassette - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to obtain a magnetic tape in a cassette housing that is not likely to be touched by a human finger and have a fingerprint or the like. [Structure] An opening 3, 4a, 4b, 5a is provided on the front side of the cassette housing 1, and the front wall of the cassette housing 1 is open.
And openings 5 and 5b corresponding to the openings 3 and 4
1. A tape cassette comprising a shutter member 9 slidable between a first position for closing a, 4b, 5a and 5b and a second position for opening the shutter member. Is a tape cassette configured to slide within a range in the longitudinal direction on the front side.

Description

Detailed Description of the Invention

[0001]

This invention relates to digital signals such as PCs.
It relates to a tape cassette suitable for use in recording M signals.

[0002]

2. Description of the Related Art At present, there has been proposed a PCM recording / reproducing apparatus for converting an analog signal such as an acoustic signal into a digital signal, for example, a PCM signal for recording or reproducing the signal. This P
In a CM recording / reproducing apparatus, it is usual to use a tape cassette loaded with a magnetic tape as a recording medium.

Generally, a standard type tape cassette is constructed as shown in FIG. That is, in FIG. 6, reference numeral 1 denotes a cassette housing, and this cassette housing 1 is constructed by combining a pair of cassette housing halves 1a and 1b by screwing. These cassette housing halves 1a and 1b are each made of a resin, for example, ABS resin. Reference numeral 2 is a magnetic tape housed in the cassette housing 1. Reference numeral 3 denotes a central opening on the front surface of the cassette housing 1, and the recording / reproducing head is inserted through the central opening 3 at the time of recording or reproducing. Further, 4a, 4b and 5a, 5b are small windows and openings arranged at symmetrical positions, respectively, and 6a, 6b and 7a, 7b.
Are capstan insertion holes and positioning holes, 8a and 8 respectively.
Reference numeral b indicates the left and right reel shaft insertion holes.

[0004]

However, in such a conventional tape cassette, this cassette housing 1 is used.
The central opening 3 and the openings 5a and 5b on the front surface of the are relatively large enough to accommodate a human finger.
A human finger may touch the magnetic tape 2 in the cassette housing 1 via 5a and 5b, which may cause fingerprints or the like on the magnetic tape 2. Especially in PCM recording, there is a problem that a fingerprint or the like attached to the magnetic tape 2 causes dropout of a reproduction signal.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to obtain a magnetic tape in a cassette housing that is not likely to be touched by a human finger and have a fingerprint or the like.

[0006]

The tape cassette of the present invention is provided on the front side of the cassette housing 1, as shown in FIGS. 1 to 4, and the opening 3 of the front wall of the cassette housing 1 is formed. , 4a, 4b, 5a and 5b, and slides between a first position for closing the openings 3, 4a, 4b, 5a and 5b and a second position for opening them. A tape cassette provided with a possible shutter member 9 is configured so that the shutter member 9 slides within a range in the longitudinal direction of the front side of the cassette housing 1.

[0007]

According to the tape cassette of the present invention, the through hole is provided on the front side of the cassette housing 1, and the through holes corresponding to the openings 3, 4a, 4b, 5a and 5b of the front wall of the cassette housing 1. A tape cassette having a shutter member 9 having a shutter member 9 slidable between a first position for closing the opening 3, 4a, 4b, 5a and 5b and a second position for opening the opening. Since the shutter member 9 is configured to slide within the range in the longitudinal direction of the front side of the cassette housing 1, the sliding range of the shutter can be narrowed, and the cassette housing can be downsized. At the same time, the size of the recording / reproducing apparatus can be reduced accordingly.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the tape cassette of the present invention will be described below with reference to FIGS. 1, 2, 3 and 4. 1 to 4, parts corresponding to those in FIG. 6 are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, a shutter 9 is arranged on the front surface of a cassette housing 1 of a standard type tape cassette as shown in FIG. The shutter 9 covers the front openings 3, 5a, 5b and the small windows 4a, 4b in response to sliding, and the shutter 9 is longer than nonmagnetic metal or phosphor bronze as shown in FIGS. The openings 5a, 5
b is formed in a plate shape having a thickness of 0.3 to 0.4 mm and a through hole is provided at a predetermined position corresponding to the central opening 3, the small windows 4a and 4b, and the opening 5b. At the same time, the end portion on the opening 5b side is cut out to provide a narrow width portion. Further, an end portion of the shutter 9 on the narrow portion side is bent into a semi-cylindrical shape to provide a locking convex portion 9a, and the other end portion is, for example, 0.4 mm.
The handle part 9b for sliding is provided by bending it.

On the other hand, the cassette housing 1 is provided with a housing portion on the front surface thereof for housing the shutter 9 slidably in the left and right directions. In this case, locking recesses 10R and 10L are provided in the storage portion that stores the narrow portion of the shutter 9. The recesses 10R and 10L engage with the projection 9a on the shutter 9 side to lock the shutter 9 at a predetermined position. In this example, when the convex portion 9a is engaged with the concave portion 10R, the shutter 9 causes the central opening 3, the small window 4a,
4b and the openings 5a, 5b are locked at a position that does not cover them, and when the convex portion 9b engages with the concave portion 10L, the shutter 9 causes the central opening 3, the small windows 4a, 4b, and the opening 5.
It is locked at a position that covers a and 5b. The other parts are configured in the same manner as the conventional one.

According to the tape cassette thus constructed, the shutter 9 is slid to the left through the grip portion 9b when the recording medium is not used for recording and reproduction, that is, at the time of storage, and the convex portion 9a of the shutter 9 is held in the cassette casing. The concave portion 10L of the body 1 is engaged and locked. In this case, as shown in FIG. 4, the central opening 3, the small windows 4a and 4b, and the openings 5a and 5b on the front surface are covered with the shutter 9, and the finger is used to cover the central opening 3 and the small windows 4a and 4b.
The magnetic tape 2 is prevented from coming into contact with the magnetic tape 2 through b or the openings 5a and 5b.

When the recording / reproducing apparatus is loaded and used for recording or reproduction, the shutter 9 is slid to the right through the grip portion 9b so that the projection 9a of the shutter 9 is recessed in the cassette housing 1. And lock it. In this case, as shown in FIG. 1, the central opening 3 and the small window 4 on the front surface side of the cassette.
Since a, 4b and openings 5a, 5b are not covered by the shutter 9, the magnetic head and the pinch roller can be brought into contact with the magnetic tape 2 without any trouble.

As described above, according to the tape cassette of this embodiment, the shutter 9 is provided so as to cover the central opening 3, the small windows 4a and 4b, and the openings 5a and 5b on the front surface. Can be prevented from coming into contact with the magnetic tape 2 through the central opening 3, the small windows 4a and 4b or the openings 5a and 5b, and the reproduced signal does not have dropout due to hand marks such as fingerprints and the like. It can be used to record a signal to obtain a suitable one.

Also, the sliding range of the shutter is narrow,
It is possible to reduce the size of the cassette housing,
At the same time, the recording / reproducing apparatus can be downsized.

FIG. 5 shows another embodiment of the present invention.
In FIG. 5, the shutter 9 covers the central opening 3 and the openings 5a and 5b in a left-right symmetric lattice pattern during storage, and even in the embodiment shown in FIG. It will be easily understood that the same effects as those of the embodiment shown in FIG. 4 can be obtained.

In the above embodiment, the central opening 3, the small windows 4a, 4b and the openings 5a, 5b are formed by the shutter 9.
However, it is needless to say that the same operation and effect as described above can be obtained even if all of them are covered. Further, in the above-described embodiment, the case where the shutter 9 is manually slid by the grip portion 9b has been described, but the slidable shutter 9 can be mechanically slid on the recording / reproducing apparatus side. Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.

[0017]

According to the tape cassette of the present invention, since the shutter 9 is provided so as to cover the central opening 3, the small windows 4a and 4b, and the openings 5a and 5b on the front surface, the fingers are opened to the central opening. Part 3, small windows 4a, 4b or openings 5a, 5
The magnetic tape 2 can be prevented from coming into contact with the magnetic tape 2 through b, dropout due to fingerprints or other stains on the reproduction signal does not occur, and a suitable PCM signal can be obtained. it can.

Also, the sliding range of the shutter is narrow,
It is possible to reduce the size of the cassette housing,
At the same time, the size of the recording / reproducing apparatus can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a tape cassette of the present invention.

FIG. 2 is an enlarged plan view of an essential part showing one cassette housing half body of FIG. 1 removed.

FIG. 3 is an enlarged front view showing the front surface of FIG.

FIG. 4 is a perspective view showing an embodiment of the tape cassette of the present invention.

FIG. 5 is a perspective view showing another embodiment of the present invention.

FIG. 6 is a perspective view showing an example of a conventional standard type tape cassette.

[Explanation of symbols]

 1 cassette housing 2 magnetic tape 3 central opening 4a, 4b small window 5a, 5b opening 9 shutter

Claims (1)

[Claims] 1. A first housing which is provided on a front surface side of a cassette housing and has a through hole portion corresponding to an opening portion of a front wall portion of the cassette housing body, the first position closing the opening portion and the first position opening the opening portion. A tape cassette provided with a shutter member slidable between two positions, characterized in that the shutter member is configured to slide within a range of a front side of a cassette housing in a longitudinal direction. Tape cassette.