JPS60185280A - Tape cassette - Google Patents

Abstract

PURPOSE:To prevent a magnetic tape from the electrostatic charge of static electricity generated by friction between the magnetic tape and guide pins by providing electrodes conducted to at least one guide pin on the outer surface of a cassette case. CONSTITUTION:The electrodes 8, 80 conducted to respective heads of a feeding side guide pin 2 and a winding side guide pin 20 are provided on the outer surface of the cassette case 1. Static electricity electrostatically charged to the magnetic tape 6 is destaticized by earthing the electrodes 8, 80. When the tape cassette is loaded to a VTR (not shown in figure), the electrode 8 conducted to the feeding side guide pin 2 is conducted to an earth electrode in the VTR.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a tape cassette, and more particularly to a tape cassette with improved magnetic tape running characteristics.

, [Prior Art] Conventionally, there has been a device of this type used in a VTR as shown in FIG. FIG. 1 is a plan view of a conventional tape cassette for a VTR. A supply reel 5 is provided on the left side of the cassette 1-case 1, and a take-up reel 4 is provided on the right side.

At the upper end of the cassette case 1, there is provided a lid 7 which is rotated and opened when the tape cassette is used, and a side wall 10 along which the magnetic tape 6 runs parallel to the lid 7 is provided. Further, a supply side guide bin 2 is fixed to the cassette case 1 on the left side of the cassette case 1 in close proximity to the side wall 10.
A take-up guide bin 20 is fixed to the cassette case 1 on the right side close to the side wall 10. In addition, low friction bottle 3
is fixed to the cassette case 1 near the take-up guide bin 2o. The magnetic tape 6 extends from the supply reel 5 through the supply side guide bin 2 along the side wall 10, and extends along the side wall 10 from the supply side guide bin 20. It extends through the low-friction pin 3 to the winding wheel 4. A magnetic tape 6 is wound around the supply reel 5, and the magnetic tape 6 supplied from the supply reel 5 is wound onto the take-up reel 4. Similarly, the magnetic tape 6 supplied from the take-up reel 4 is wound onto the supply reel 5. The guide bin 2 on the supply side and the guide bin 20 on the take-up side guide the running of the magnetic tape 6 and also stretch the magnetic tape 6 so that the magnetic tape 6 runs parallel to the side wall 10 of the cassette case 1. 6 take-up reel 4. Smooth winding onto the supply reel 5.

Similarly, the low friction bottle 3 also guides the running of the magnetic tape 6 and also stretches the magnetic tape 6. The magnetic tee 76 is attached to the supply side kite bin 22 and the winding side guide bin 20 on the base surface side.
It is in contact with the low +1 [bottle 3] on the magnetic surface side.

Next, the operation of this device will be explained. magnetic tape 6
During fast forwarding or rewinding, the magnetic tape 6 is not pulled out from the cassette case 1, but is driven by the take-up reel 4 or the supply reel 5 to perform fast forwarding or rewinding. At this time, since the supply guide 229 and the take-up guide bin 20 are fixed to the cassette case 1, friction occurs between the side surfaces of the supply guide 229 and the take-up guide bin 20 and the base surface of the magnetic tape 60, and static electricity is generated. This occurs, and the magnetic tape 6 is charged with static electricity.

Since the conventional tape cassette is constructed as described above, when the magnetic tape is repeatedly fast-forwarded or rewound, static electricity is charged on the magnetic tape 6, so that the magnetic tape 6 is exposed to the cover 7, side wall 10, etc. of the cassette case 1. Supply side guide pin 2
There was a drawback that the magnetic tape was stuck to the guide bin 20 on the second winding side and the magnetic tape could not run stably.

[Summary of the Invention] This invention was made to eliminate the above-mentioned drawbacks of the conventional ones. Therefore, the main object of the invention is to provide a tape cassette with improved magnetic tape running characteristics. It is.

To summarize the invention, there is provided a cassette case, at least one reel provided within the cassette case, a magnetic tape wound around the reel, a magnetic tape extending from the reel that guides the running of the magnetic tape, and a magnetic tape that is connected to the cassette case. The tape cassette includes at least one kite bin provided in close proximity to the side wall for stretching along the side wall of the tape cassette, the tape cassette having an electrode electrically connected to at least one guide bin and provided on the outer surface of the cassette case. This is a tape cassette.

The above objects and other objects and features of the present invention will become more apparent from the following detailed description with reference to the drawings.

[Embodiment of the Invention] FIG. 2 is a perspective view of a tape cassette for a VTR which is an embodiment of the invention. Note that in FIG. 2, the same parts as in FIG. 1 are given the same reference numbers. Further, in the configuration and operation of FIG. 2, explanations of parts similar to those of FIG. 1 will be omitted. In FIG. 2, the difference from #IJA in the conventional VTR tape force set 1 to #IJA in FIG. This point is provided on the outer surface of the case 1, and is intended to eliminate static electricity charged on the magnetic tape 6 by grounding the electrodes 8 and 80.

FIG. 3 shows a tape cassette according to an embodiment of the present invention.
FIG. 3 is a perspective view showing how static electricity charged on a magnetic tape is removed when it is attached to a TR. In addition, in the third factor, the same reference numbers are given to the same parts as in FIGS. 1 and 2. When the tape cassette is installed in a VTR (not shown), 1$i8 which is electrically connected to the supply side guide bin 2 is VT
It is designed to be electrically connected to the ground electrode 9 in R.

Since the present invention is constructed as described above, the magnetic tape 6 can be quickly forwarded or rewinded, and the cassette case 1 can be
The supply side guide bin 2, which is in contact with the magnetic tape 6 inside, is always at zero potential. Therefore, even if the magnetic tape 6 is charged with static electricity, the static electricity is removed through the supply side guide bin 2 and the surface potential of the magnetic tape 6 decreases, causing the magnetic tape 6 to be attached to the lid 7, side wall 10 of the cassette case 1, or the supply side. Side guide bin 2
゜The magnetic tape can run stably without being attracted to the take-up side guide bin 20 or the like.

In the explanation of the above embodiment, an electrode that conducts to the head of the guide pin is separately provided on the outer surface of the cassette case, but the same effect can be obtained by exposing the head of the guide pin on the outer surface of the cassette case and using it as an electrode. It has the effect of

Furthermore, static electricity charged on the magnetic tape may be removed by grounding one guide pin or by grounding two guide pins at the same time.

[Effects of the Invention] As described above, according to the present invention, the boop cassette includes an electrode electrically connected to at least one guide pin in the cassette case and provided on the outer surface of the cassette case. This prevents the magnetic tape from being charged with static electricity caused by friction between the tape and the guide pin when fast-forwarding or rewinding the magnetic tape. Stable running is achieved without adhesion to guide pins, etc.

[Brief explanation of drawings]

FIG. 1 is a plan view of a conventional tape cassette for a VTR. FIG. 2 is a perspective view of a VTR tape cassette according to an embodiment of the present invention. FIG. 3 is a perspective view showing how static electricity charged on a magnetic tape is removed when a tape cassette according to an embodiment of the present invention is mounted on a VIR. In the figure, 1 is a cassette case, 2 is a supply side guide bin, 20 is a take-up side guide bin, 3 is a low friction bin, 4 is a take-up reel, 5 is a supply reel, 6 is a magnetic tape, 7 is a lid,
8 and 8o are electrodes, 9 is a ground electrode inside the VTR, and 1o is a side wall. Agent Oiwa Increase Miscellaneous 1 Figure 2

Claims (3)

[Claims] (1) a cassette case; at least one reel provided in the cassette case; a magnetic tape wound around the reel; In a tape cassette, the tape cassette is provided with at least one guide bin provided close to the side wall in order to be stretched along the fM wall of the cassette case, and the tape cassette is electrically connected to the at least one guide bin and is connected to the outside of the cassette case. A tape cassette characterized by having electrodes provided on its surface. (2) the at least one reel has first and second reels;
the magnetic tape is wound around the first and second reels and stretched between them; the at least one guide bin consists of the first and second guide bins; The first and second guide bins are close to the side wall of the cassette case in order to guide the running of the magnetic tape and to stretch the magnetic tape extending between the first and second reels along the side wall of the cassette case. The tape cassette according to claim 1, wherein the tape cassettes are provided at intervals. (3) The tape cassette according to claim 1, wherein the electrode provided on the outer surface of the cassette case has the at least one guide bin exposed on the outer surface of the cassette case. .