JP2536514Y2 - 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, and more particularly to a structure for variously storing and carrying the cassette.

[0002]

2. Description of the Related Art Conventionally, when storing or carrying a magnetic tape cassette used in audio equipment or the like,
The magnetic tape cassette is housed in a cassette housing case. The cassette storage case has a structure that covers the entire cassette, has a dustproof effect and a shock reduction effect, and has an excellent function of protecting the cassette. In particular, in the case of a compact audio cassette in which an opening for inserting a magnetic head is provided on the front surface of the cassette, a finger or the like is easy to touch the surface of the magnetic tape, and a cassette storage case is a necessity when carrying.

In recent years, with the spread of portable tape recorders, car audios, and the like, the use of the magnetic tape cassette has been increasing outdoors and in automobiles, and the magnetic tape cassette as described above must be carried and used. There are many.

[0004]

However, since the cassette storage case is naturally larger than the magnetic tape cassette, the cassette storage case becomes bulky when stored in the case. Therefore, the storage volume is large and the portability is inconvenient. In order to solve such a problem, the present applicant has proposed a thin cassette storage case. However, the magnetic tape cassette is still stored in the cassette storage case, and it is undeniable that the cassette storage case is generally larger than the magnetic tape cassette itself.

Further, it is needless to say that the cassette accommodating case has a predetermined volume even while the magnetic tape cassette is being used. When using the magnetic tape cassette, there is a problem that the cassette storage case during use of the magnetic tape cassette is bulky and inconvenient. That is, an object of the present invention is to solve the above-mentioned problem, and it is possible to prevent dust or the like from entering the cassette or touching the magnetic tape surface with a finger or the like without storing the magnetic tape cassette in the cassette storage case. An object of the present invention is to provide a magnetic tape cassette which is easy to carry and which is easy to use.

[0006]

According to the present invention, there is provided a magnetic tape cassette comprising a pair of upper and lower cassette halves rotatably housed in a case comprising a pair of upper and lower cassette halves. A substantially U-shaped cover having the same width as the case thickness of the case and comprising a lid covering the rear side wall of the case, and side pieces extending forward from both ends of the lid and covering the left and right side walls of the case. Are rotatably supported around a rotation axis extending in the left-right direction of the cassette by a shaft supporting portion provided on the left and right side walls of the case, and the case and the rotating band are The magnetic tape cassette is provided with engaging means for maintaining the lid of the rotating band at a position covering the rear wall of the case or a position covering the front opening. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIG. 1, a magnetic tape cassette 1 is composed of a pair of hubs each having a magnetic tape T wound in a case composed of an upper cassette half 2a and a lower cassette half 2b having a pair of hub holes 6a and 6b. 4a,
4b, a cassette body 7 in which the upper and lower cassette halves 2a, 2b are integrally fixed by screws 3, and a rotating band 11 attached to the case.

The hubs 4a and 4b are rotatably disposed in the case, and the drive shafts of the tape recorder inserted through the hub holes 6a and 6b engage with the inner peripheral walls of the hubs 4a and 4b. A plurality of hub claws 5a and 5b are provided to protrude. The rotating band 11 includes a lid 11c that covers a rear wall 7c of the cassette body 7, and side pieces 11a and 11b that extend forward from both ends of the lid 11c to cover the left and right side walls 7a and 7b. And has the same width dimension h as the thickness of the case of the cassette body 7. The rotating strip 11 is provided with the side pieces 11a, 11b.
The left and right side walls 7a and 7b are rotatably supported about a rotation axis extending in the left-right direction of the cassette by a shaft supporting portion provided between the left and right side walls 7a and 7b. Thus, the lid 11c can take a position covering the rear side wall 7c and a position covering the front opening 8 of the cassette body 7.

A pair of erroneous erasure prevention claws 13 are formed near the left and right ends of the lid 11c. The erroneous erasure prevention claw 1
Numeral 3 replaces the erroneous erasure preventing claw 13 formed on the rear side wall of the conventional magnetic tape cassette. Therefore, no erroneous erasure preventing claw is formed on the rear side wall 7c.

A guide projection 14 extending in the longitudinal direction is formed on the outer surface near the tip of each of the side pieces 11a and 11b. The guide projections 14 replace the guide projections formed on the left and right side walls of the conventional magnetic tape cassette, and do not have the guide projections on the left and right side walls 7a and 7b.

Further, on the inner surface near the base of the side pieces 11a and 11b, a locking projection 1 protruding inward of the cassette is provided.
2 and locking recesses 9 and 10 with which the locking projections 12 are engaged are provided near the front and rear ends of the left and right side walls 7a and 7b. Therefore, the rotating belt 11 is provided with a position where the lid 11c covers the front opening 8 as shown in FIG. 2, and the rear side wall 7c as shown in FIG.
Is locked at a position that covers

Next, the structure of a shaft support provided between the cassette body 7 and the rotating band 11 will be described. FIG.
5 is a cross-sectional view of a main part and a cross-sectional view taken along the line AA showing the structure of a shaft support provided between the right side wall 7b of the cassette body 7 and the side piece 11b of the rotating band 1. However, the same applies to the structure of the shaft support provided on the left side of the cassette body 7. At a substantially central portion of the right side wall 7b in the front-rear direction of the cassette, a long hole 16 extending in the front-rear direction of the cassette is formed on the joining surface of the cassette halves 2a and 2b, In the approximate center of the direction, a support shaft 1 protruding inward of the cassette is provided.
5 are provided. Therefore, by pivotally supporting the support shaft 15 by the elongated hole 16, the rotating belt 11 is attached to the cassette body 7 so as to be rotatable about a rotational axis extending in the cassette left-right direction.

The slot 16 allows play for the movement of the support shaft 15 in the front-rear direction of the cassette, so that the front and rear edges of the cassette body 7 can be rotated when the lid 11c of the rotary band 11 rotates. Can be prevented. Further, a space is formed inside the cassette of the elongated hole 16 so as to accommodate the retaining flange 15a of the support shaft 15, for preventing dust and the like from entering the cassette from the elongated hole 16. A partition wall 17 is provided. Next, the operation of the rotating band 11 will be described.

First, when the magnetic tape cassette 1 is not used as described above, the rotating belt 11 is rotated to a position where the cover 11c covers the front opening 8 of the cassette body 7. At this time, the locking projections 12 provided on the inner side surfaces of the side pieces 11a, 11b are fixed to the left and right side walls 7a, 7b.
As shown in FIG. 2, the rotary band 11 is held in a state where the lid 11c covers the front opening 8 because the rotary band 11 is fitted into the locking recess 9 provided in the b.

Therefore, it is possible to make it difficult for dust and the like to enter from the front opening 8 and to prevent a finger or the like from touching the magnetic tape surface. There is no need to store in a storage case. At this time, the guide projection 1
4 is located at the rear end of the left and right side surfaces of the magnetic tape cassette 1, but there is no problem when the cassette is not used.

Next, when recording / reproducing by mounting the magnetic tape cassette 1 on a tape recorder as described above,
The rotating belt 11 is rotated to a position where the lid 11c covers the rear side wall 7c of the cassette body 7. At this time, the locking projections 12 provided on the inner side surfaces of the side pieces 11a, 11b fit into the locking recesses 10 provided on the left and right side walls 7a, 7b. As shown in FIG. 3, 11 is held with the lid 11c covering the rear side wall 7c. The magnetic tape cassette 1 of the present embodiment has the front, rear, left, and right dimensions of the cassette main body 7 so that the dimensions including the rotating band 11 during use are the same as those of the conventional magnetic tape cassette. It has been reduced.

Therefore, the magnetic tape cassette 1 can have the same appearance as that of a conventional magnetic tape cassette, and can be mounted on a tape recorder for recording / reproducing as in the case of the conventional magnetic tape cassette. In the above embodiment, the side pieces 11a, 11
The locking projections 12 are provided on the inner side surface of the cassette body b, and the locking recesses 9 and 10 are provided on the left and right side walls 7a and 7b of the cassette body 7. However, the projections and the recesses may be formed in reverse. Further, the form of the shaft support provided between the rotating band 11 and the cassette body 7 is not limited to the above embodiment, but may take various forms.

[0018]

The magnetic tape cassette according to the present invention has the same width as the thickness of the case of a pair of upper and lower cassette halves, and a cover for covering the rear side wall of the case.
A substantially U-shaped pivot band extending from both ends of the lid to the front of the cassette and covering left and right side walls of the case is formed by a shaft support provided on the left and right side walls of the case. A position or a front surface that is rotatably supported about a rotation axis extending in the left-right direction and that covers the rear wall of the case between the case and the rotation band; Engagement means is provided to maintain the position covering the opening. Therefore, when the cassette is not used, by covering the front opening of the case with the lid of the rotating band, it is possible to make it difficult for dust and the like to enter from the opening, and a finger or the like touches the magnetic tape surface. The magnetic tape cassette need not always be housed in the cassette housing case. Therefore,
It is possible to provide a magnetic tape cassette that is easy to carry and easy to use without a bulky storage case.

[Brief description of the drawings]

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

FIG. 2 is a partial perspective view showing a use state of the magnetic tape cassette shown in FIG.

FIG. 3 is an overall perspective view showing a use state of the magnetic tape cassette shown in FIG. 1;

FIG. 4 is a sectional view of a main part of the magnetic tape cassette shown in FIG. 1;

FIG. 5 is an AA diagram of a main part of the magnetic tape cassette shown in FIG. 4;
It is a sectional arrow view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic tape cassette 2a Upper cassette half 2b Lower cassette half 3 Screw 4a Reel 4b Reel 5a Hub pawl 5b Hub pawl 6a Hub hole 6b Hub hole 7 Cassette main body 7a Left side wall 7b Right side wall 8 Front opening 9 Locking recess 10 Stop recess 11 Rotating band 11a Side piece 11b Side piece 11c Lid 12 Locking projection 13 Erroneous erasure prevention claw 14 Guide projection 15 Support shaft 15a Retaining flange 16 Long hole 17 Partition T Magnetic tape

Claims (1)

(57) [Scope of request for utility model registration] 1. A magnetic tape cassette in which a pair of hubs around which a magnetic tape is wound is rotatably housed in a case composed of a pair of upper and lower cassette halves, the magnetic tape cassette having the same width as the case thickness of the case. The case has a substantially U-shaped rotating band body including a lid that covers the rear wall of the case and side pieces that extend forward from both ends of the lid and cover the left and right sidewalls of the case. Are rotatably supported around a rotation axis extending in the left-right direction of the cassette, and a lid of the rotating band is provided between the case and the rotating band. A magnetic tape cassette, further comprising an engaging means for maintaining a position covering the rear wall of the case or a position covering the front opening.