JPS6144318Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette for a recording/reproducing apparatus in which the length of a tape wound on a reel can be easily determined from the outside.

Nowadays, there are multiple types of tape cassettes that can record and play back 1 hour, 2 hours, or 3 hours by selecting the thickness of the tape, even though the maximum diameter of the tape is the same. It is now widely available. However, when those who purchase or use such tape cassettes try to use them, they are faced with the fact that, as mentioned above, the maximum winding diameters are almost the same, and the lengths of the tapes cannot be distinguished from the outside. It's reality. On the other hand, on the other hand, at least the part of the tape wrapped or reel that can be seen from the outside of the cassette case is colored by mixing a dyeing material during the plastic molding process, and the coloring is classified according to the type of coloring. In addition, devices in which the length of the tape to be wound can be specified have also been provided. However, such reels inevitably increase costs due to the increased process of mixing dyeing materials into the plastic and the associated complexity of various chemical and mechanical operations. There were many disadvantages in terms of inventory management and economic efficiency, such as having to make plans and keep a large amount of spare stock.

The present invention was developed to improve the problems of the conventional method. Only one type of reel is prepared, and this reel can be seen from the outside depending on the length to be wound on it. We have created a new tape cassette for recording and reproducing equipment that has a reel that allows you to easily identify the tape length without creating excess inventory and economically by coloring the position of each tape length. provide.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are a schematic front sectional view and bottom view of a reel attached to a tape cassette of a VTR. Note that in FIG. 1, the upper and lower flanges 1, 2 and the hub 3 are shown as one unit to simplify the explanation, but in reality, for convenience of assembly,
It consists of a plurality of individual units assembled together. 4
1 is a case of a tape cassette, and a guide protrusion 7 projecting from the lower part of the flange 2 of the reel 6 is loosely fitted into a through hole 5 provided in the case. A leaf spring 8 is attached to the case 4 and suppresses the central protrusion 9 of the reel 6. On the other hand, on the side of the reel 6 facing the through hole 5, a reel drive shaft fitting part 10 into which a reel drive shaft is fitted is provided as shown. This fitting part 10 has a shallow, large-diameter annular notch 11 provided in a portion corresponding to the guide protrusion 7, and an engaging pawl 12 that is slightly smaller in diameter and deeper than this, and that engages with the reel drive shaft on the inner surface. Protruding cutout hole 13
and an annular shallow inclined notch 14 continuous thereto,
It consists of a center hole 15 with the smallest diameter which is continuous to this, and a conical notch 16 which is further continuous to this. Further, on each surface of the annular notch 11 and the conical notch 16, marks a and b are printed in different colors to specify the length of the magnetic tape wound on the reel 6, as shown by cross hatches. This stamping is performed using quick-drying ink or slow-drying ink to represent a predetermined pattern or figure. For example, the characters ``1 hour'' and ``2 hours'' may be directly used as the mark, or a circle, triangle, or other alphanumeric symbol may be used. It should be noted that since the above-mentioned seal only needs to be placed on a portion visible from the outside, it can also be placed on the notch hole 13 or the inclined notch 14. In this case, if quick-drying ink is used for the above-mentioned stamp, replenishment of the stamp ink is troublesome, so slow-drying ink is used. It is most appropriate to apply the seal to the annular notch 11 and conical notch 16, where there is no risk of contact with other objects, such as the annular notch 11 and the conical notch 16.

As described above, in the present invention, the front side of the tape reel for winding the tape is covered with the case of the tape cassette, and the back side of the reel having the reel drive shaft fitting portion is exposed through the through hole provided in the case of the tape cassette. In the exposed tape cassette,
A mark specifying the length of the tape to be wound on the tape reel is imprinted on the inner wall of the reel drive shaft fitting part, at least on the wall surface other than the part that should come into contact with other objects during handling of the tape reel. Therefore, anyone can easily determine the length of the tape wound on the reel of each tape cassette by looking at the mark. In addition, the work of stamping this mark only needs to be done in the required amount for each length of tape, and the reel can be easily and inexpensively stamped compared to the conventional method of adding color to the plastic before molding. There are various practical advantages, such as easy production management of reels.

[Brief explanation of the drawing]

The drawings show an embodiment of the tape cassette reel according to the present invention, and FIG. 1 is a front sectional view thereof, and FIG.
The figure is also a bottom view. 4...cassette case, 6...reel, 10...
...Reel drive shaft fitting part.

Claims (1)

[Scope of utility model registration request] In the tape cassette, the front side of the reel of the tape reel for winding the tape is covered with the case of the tape cassette, and the back side of the reel having the reel drive shaft fitting part is exposed through a through hole provided in the case of the tape cassette. , a mark specifying the length of the tape to be wound on the tape reel is imprinted on the inner wall of the reel drive shaft fitting part, at least on the wall surface other than the part that should come into contact with other objects during handling of the tape reel; A tape cassette characterized by: