JPH01198376A - cassette case - Google Patents

Abstract

PURPOSE:To prevent a rise in voltage of electrification in a cassette and to suppress the effect of electrification on the outside of the cassette, by forming a film layer containing a conductive fiber to the outer surface part of the cassette. CONSTITUTION:As a conductive film, a metal fiber such as a stainless steel fiber or a carbon fiber is mixed with a synthetic resin general as the base material of a film layer before use. The conductive film 12 is bonded to the entire outer surface part of a cassette 1, that is, the entire outer surface parts of both of a case main body 2 and a case cover 3. When this ink ribbon cassette is mounted on the carriage of a printer to operate the printer, static electricity is generated by the friction between a printing head and an ink ribbon 6, and that between an post and the ink ribbon 6 and the interior of the cassette is ready to come in a high voltage electrified state but, since the conductive film 12 undergoes corona discharge, a rise in voltage is prevented and, since the conductive film 12 shields the cassette 1, the effect of electrification on the outside of the cassette is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to static electricity countermeasures for cassette cases, such as ink ribbon cartridges for printers and tape cassettes for audio, which have internal running paths for ribbons, tapes, etc. It is something.

[Conventional technology]

Inside a cassette case of an ink ribbon for a printer, a running path of the ink ribbon is formed, with a portion exposed to the outside from the supply reel to the take-up reel to come into contact with the print head. Further, in the case of an audio tape cassette case, the tape running route is configured in substantially the same manner. These cassette cases generally consist of a case body and a case cover, and are made of non-conductive material such as plastic. Due to friction between the case and the ribbon or tape, and friction between the cassette case and each reel, the cassette case, ribbon, tape, etc. may become charged, which may cause the user to malfunction or damage the cassette CPU device. Ta.

Conventionally, such a charging layer is connected to a control circuit by a ground wire,
A solution to this problem has been to electrically process the problem by providing a capacitor or a shield plate, but this has the disadvantage of making the circuit structure complicated and large, resulting in increased costs.

[Problem that the invention seeks to solve]

Therefore, it is an object of the present invention to solve the problem of charging the cassette case by a simpler method.

[Means for solving problems]

The present invention achieves the above object by providing a cassette case characterized in that a film layer containing conductive fibers is provided on the outer surface of the case in which a running path for tapes, ribbons, etc. is formed. This is what we aim to do. Here, as the conductive fibers, metal fibers such as stainless steel fibers, carbon fibers, etc. can be used. Further, general synthetic resins can be used as the base material of the film layer.

[Effect]

In the present invention, a layer of a film containing conductive fibers (hereinafter referred to as "conductive film") is formed on the outer surface of the case, so even if the case is charged due to static electricity, corona discharge will occur from the conductive film layer. It is difficult to generate high voltage, and the shielding effect of the conductive film layer makes it possible to suppress the influence of charging on the outside of the case.

〔Example〕

The figure shows an ink ribbon cassette for a thermal transfer printer as an embodiment of the present invention.

The cassette case (1) is composed of a case body (2) and a case cover (3) and has a housing shape as a whole.

A supply reel (4) and a take-up reel (5) are installed inside the case, and an ink ribbon (6) is guided from the supply reel (4) to a required guide roller (7), which is installed on the outer surface of the case. The running path of the ink ribbon (6) is configured such that the ink ribbon (6) reaches the take-up reel (5) after being exposed to the print head insertion recess (8).

In addition, an elastic piece (
A brake member (1o) attached to the tip of the ink ribbon (1o) and a post (11) hanging vertically from the bottom of the case body (2) are arranged to sandwich the ink ribbon (6). A conductive film (12) is placed on all the outer surfaces of the cassette case (1), that is, the outer surfaces of the case body (2) and the case cover (3).
is pasted all over.

When this ink ribbon cassette is attached to the printer carriage and the printer is operated, the print head (not shown), the ink ribbon (6), the supply reel (4), the case body (2), the take-up reel (5), and the case body appear. (2), case body (2) and ink ribbon (6), each guide roller (7) and ink ribbon (6), and brake material (10
) and the ink ribbon (6), and between the post (11) and the ink ribbon (6), etc., static electricity is generated and the inside of the cassette becomes charged at high voltage, but as mentioned above, the conductive film ( 12) generates a corona discharge, thereby preventing high pressure, and since the conductive film (12) shields the cassette case (1), the influence of charging on the outside of the cassette is suppressed.

〔Effect of the invention〕

As described above, the present invention uses a simple method of forming a film layer containing conductive fibers on the outer surface of the cassette case to prevent the charging voltage inside the cassette from becoming high and to suppress the influence of the charging on the outside of the cassette. Therefore, the purpose can be achieved without increasing the cost as in the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the center of an ink ribbon cassette according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view taken along the line A--A in FIG. (1)...Cassette case, (2)...Case body. (3)...Case cover, (4)...Supply reel. (5)...Take-up reel, (6)...Ink ribbon. (7)...Guide roller, (8)...Print head fitting ===Y#hi 肚藝cream

Claims (1)

[Claims] A cassette case characterized in that a film layer containing conductive fibers is provided on the outer surface of the case in which a running path for tape, ribbon, etc. is formed.