JP2544306Y2 - Storage case for magnetic tape cassette - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cassette storage case, and more particularly to an improvement of a magnetic tape cassette storage case used for storing an audio magnetic tape cassette.

[0002]

2. Description of the Related Art A magnetic tape cassette used for audio or the like is usually stored in a plastic magnetic tape cassette storage case (hereinafter simply referred to as a storage case) during storage. That is, the magnetic tape cassette (hereinafter, simply referred to as a cassette) includes a cassette front opening through which a magnetic head or the like is inserted when the magnetic tape cassette is loaded into a recording / reproducing apparatus, and a magnetic tape extending across the front opening. Is to run.

Therefore, foreign matter such as dust easily enters the cassette from the front opening, and if dust adheres to the magnetic tape, a signal dropout occurs, resulting in good recording and / or recording.
Playback stops. Further, the housing of the cassette is molded using a synthetic resin, and is easily broken by an impact such as dropping. Therefore, in order to prevent dust from adhering to the magnetic tape and protect the entire cassette,
It is stored in the storage case.

The basic structure of the storage case is as follows. The storage case includes a lid member having a pocket in which one end of the cassette is stored, and a casing member pivotally attached to the lid member and capable of opening and closing like a door. And the lid member and the casing member are integrally formed of synthetic resin.

[0005] As a synthetic resin for molding the storage case, inexpensive general-purpose polystyrene (GPPS) having high transparency and being inexpensive has been frequently used. That is, since the design of the cassette stored in the storage case needs to be visually observed from outside the case, and the items described on the index card stored together with the cassette need to be confirmed, synthetic resin having high transparency has been frequently used.

[0006]

[Problem to be solved by the invention] However, GPP
Although the storage case formed of S has the advantage of high transparency, it has the property of low hardness and low surface strength. For this reason, the pivoting portion and the fitting / locking portion may be worn by the opening / closing operation of the storage case, or may be rubbed against the stored cassette during storage or transportation, thereby generating shavings. Since the shaving powder is a fine powder, the shaving powder easily diffuses in the storage case in an unpredictable manner and adheres to the surface of the magnetic tape exposed at the opening of the cassette. As a result, there is a problem that recording and reproduction are not performed at the position where the shavings of the magnetic tape are adhered, so that a so-called signal dropout occurs and good recording and reproduction cannot be performed.

Further, in order to prevent the generation of shavings as described above, for example, if the storage case is formed of a resin having high abrasion resistance or a resin having good slidability, such a resin has low transparency. However, there is a problem that the index card stored in the storage case cannot be seen from outside the case. That is, an object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a storage case for a magnetic tape cassette that can visually check the magnetic tape cassette and reduce generation of shavings.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a magnetic tape cassette in which a lid member having a pocket for accommodating one end of a magnetic tape cassette and a casing member having a rotation preventing projection are rotatably pivoted. In the magnetic tape cassette storage case, at least the lid member and the side wall portion of the casing member including the flat plate portion and the pivotally attached portion of the lid member and the casing member opposed to the thickness increasing portion of the magnetic tape cassette are formed of a case. Resin that can be seen from outside
It is achieved by the storage case for a magnetic tape cassette, characterized in that it has been formed by a good resin slidability than other portions molded Ri by the. As the transparent resin, a synthetic resin such as GPPS is used, and as the resin having good slidability, high impact polystyrene (HI
A synthetic resin such as a resin obtained by adding silicone oil to PS) can be used.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of the magnetic tape cassette storage case and the magnetic tape cassette. The storage case 1 for the magnetic tape cassette has a pocket 4
And a casing member 3 having a pair of anti-rotation protrusions 5, a support shaft 6 protruding inside the left and right side wall portions 3a of the casing member 3, and left and right side walls of the pocket 4. The cover member 2 and the casing member 3 can be opened and closed like a door by fitting a fitting hole (not shown) provided through the portion 4a.

The pocket 4 is provided with the magnetic tape cassette 1.
The pair of anti-rotation protrusions 5 are provided in the shaft insertion hole 1 of the cassette 11.
3 to engage with the hub to prevent the magnetic tape T from sagging. A protrusion 7 is formed on the left and right side wall portions 4a, and the left and right side wall portions 3 corresponding to the protrusions 7 are formed.
a is formed with an engagement recess 8. Therefore, when the lid member 2 and the casing member 3 are closed, the protrusion 7
The engagement recess 8 is engaged with the cover member 2 to hold the lid member 2 and the casing member 3 in a closed state.

Furthermore, a portion A of the flat plate portion of the lid member 2 and the casing member 3 facing the upper and lower surfaces of the magnetic tape cassette 11 and corresponding to a region excluding at least the thickness increasing portion 12 of the magnetic tape cassette 11. , And B were formed of a transparent GPPS resin, and the other portions indicated by hatching in FIG. 1 were formed of a resin obtained by adding silicon oil to HIPS having high slidability.

That is, parts that are easy to be rubbed when the magnetic tape cassette 11 is stored, parts that are easy to rub such as the fitting part of the support shaft 6 and the fitting hole and the fitting and locking part of the projection 7 and the fitting recess 8 are included. Since the magnetic tape cassette 11 was formed of a synthetic resin having good slidability, not only the magnetic tape cassette storage case 1 but also the magnetic tape cassette 11 were not shaved, and the generation of shavings could be reduced. Also, the magnetic tape cassette 11
Since the portions A and B corresponding to the region excluding the thickness increasing portion 12 of the magnetic tape cassette 11 are transparent, the description of the label or index card of the stored magnetic tape cassette 11 can be visually checked.

Therefore, when storing or carrying the magnetic tape cassette storage case 1 in a state where the magnetic tape cassette 11 is stored, shavings do not adhere to the magnetic tape, thereby causing a signal dropout. Is eliminated. The storage case 1 for a magnetic tape cassette as described above is formed of two types of synthetic resins. This type of molding is performed by a molding method called a two-color molding method by those skilled in the art. Can be.

Next, another embodiment of the present invention will be described with reference to FIG. This embodiment is a thin storage case for a magnetic tape cassette that has recently been distributed (hereinafter, referred to as a thin storage case).
This is an example of application to a thin storage case 21). For the magnetic tape cassette stored in the thin storage case 21, the magnetic tape cassette 11 shown in FIG. 1 is used. Although a pocket 23 is formed in the lid member 22 constituting the thin storage case 21, the thickness increase portion 12 is not stored in the thin storage case 21, and the pocket 23 is provided after the magnetic tape cassette 11. The end is stored. A trapezoidal recess 24 for receiving the thickened portion 12 is provided at the open end of the lid member 22.
Are formed.

On the other hand, a pair of rotation preventing projections 26 are formed on the casing member 25,
A trapezoidal concave portion 27 is formed at a position facing the trapezoidal concave portion 24 when is fitted to the lid member 21. Therefore,
The magnetic tape cassette 11 is stored in the thin storage case 21.
When the lid member 22 and the casing member 25 are closed, the thickness increasing portion 12 is
27. Therefore, the case thickness can be significantly reduced as compared with the conventional structure.

The cover member 22 and the casing member 25 are also supported by a support shaft 28 so as to be freely opened and closed.
A protrusion 29 is formed on the left and right side wall portions 23a of the pocket 23, and the casing member 25 corresponding to the protrusion 29 is formed.
An engagement recess 30 is formed in the left and right side wall portions 25a. Therefore, the lid member 22 and the casing member 23
Is closed, the engaging recess 30 engages with the projection 29, and holds the lid member 22 and the casing member 23 in a closed state.

Further, also in the thin storage case 21, the thickness increasing portion 12 of the magnetic tape cassette 11 is a flat plate portion of the lid member 22 and the casing member 25 facing the upper and lower surfaces of the magnetic tape cassette 11. At least the portions C and D corresponding to the excluded area are transparent GPs.
The other portions indicated by oblique lines in FIG. 2 were formed from a resin obtained by adding silicon oil to HIPS having high slidability.

Therefore, also in the present embodiment, a portion that is easily rubbed when the magnetic tape cassette 11 is stored (especially,
Moldable portions such as the trapezoidal concave portions 24 and 27), the fitting portions between the support shafts 28 and the fitting holes, and the fitting and locking portions between the protrusions 29 and the fitting concave portions 30 are formed of synthetic resin having good slidability. As a result, the generation of shavings could be reduced. Further, since the portions C and D corresponding to the area excluding the thickened portion 12 of the magnetic tape cassette 11 are transparent, the label or index card of the stored magnetic tape cassette 11 can be visually checked. The present invention is not limited to the shape of each of the above embodiments, but can be applied to other storage cases such as a storage case configured to store a plurality of magnetic tape cassettes.

[0019]

The storage case for a magnetic tape cassette according to the present invention includes the lid member and the casing member which include a lid member facing the thickened portion of the magnetic tape cassette to be stored, a flat plate portion of the casing member, and a pivotal portion. Is formed of a resin having better slidability than other portions formed of a resin which can be seen through from the outside of the case.

That is, the portion which is easily rubbed when the magnetic tape cassette is stored and the portion which is easily scraped during opening / closing operation are formed of synthetic resin having good slidability, so that shaving powder which hinders good recording and reproduction of the magnetic tape cassette is prevented. Could be reduced. Further, since the area for visually checking the label or index card of the stored magnetic tape cassette is formed of a transparent synthetic resin, the description is not obstructed from outside the case. Therefore, it was possible to provide a good storage case for a magnetic tape cassette in which the magnetic tape cassette can be visually observed and the generation of shavings can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an embodiment of a storage case for a magnetic tape cassette according to the present invention;

FIG. 2 is a perspective view showing another embodiment of the magnetic tape cassette storage case according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage case for magnetic tape cassettes 2 Lid member 3 Casing member 3a Left and right side walls 4 Pocket 4a Left and right side walls 5 Rotation prevention protrusion 6 Support shaft 7 Projection 8 Engagement concave part 11 Magnetic tape cassette 12 Thickness increasing part 13 Shaft insertion hole 21 Magnetic Tape cassette storage case 22 Lid member 23 Pocket 23a Left and right side wall 24 Trapezoidal recess 25 Casing member 25a Left and right side wall 26 Rotation prevention protrusion 27 Trapezoidal recess 28 Support shaft 29 Projection 30 Engagement recess

Claims (1)

(57) [Scope of request for utility model registration] 1. A magnetic tape cassette storage case in which a lid member having a pocket for accommodating one end of a magnetic tape cassette and a casing member having a rotation preventing projection are rotatably pivoted, wherein at least the magnetic tape is provided. side wall portion of said cover member and said casing member comprising a flat plate portion and said pivot portion of said cover member and said casing member facing the increased thickness portion of the cassette, is molded Ri by the see-through resin from outside the casing A storage case for a magnetic tape cassette, wherein the storage case is formed of a resin having better slidability than other portions.