JPH1136U - Ink ribbon cassette - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an ink ribbon in an ink ribbon cassette from being disturbed, which is a fundamental cause of an increase in a winding torque, so that the winding torque does not increase and a winding failure does not occur. Providing a set. SOLUTION: A sheet member is provided between an ink ribbon thrust surface on the winding and storing side of an ink ribbon cassette and an inner wall of the ribbon cassette facing the ink ribbon thrust surface, and the sheet member elastically contacts the ink ribbon thrust surface.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to an ink ribbon cassette used for a printer or a typewriter that performs printing using an ink ribbon.

[0002]

[Prior art]

 FIG. 8 is a schematic view of a thermal transfer recording section using a conventional ink ribbon cassette 11. The print head 12 is pressed against the recording paper 9 via the ink ribbon 4, and in this state, the carriage shaft 10 is moved. , The ink ribbon 4 is wound while the winding core 3 is also rotating. The ink ribbon 4 is formed by coating ink on one side of a film and is very thin. Therefore, the heat is transferred locally by the print head 12 and the ink is peeled off from the ink ribbon 4 caused by the transfer of the ink. Due to the expansion and contraction, the tensile strength becomes non-uniform, which causes a winding disorder phenomenon. That is, there is a difference in the tensile strength between the portion where the ink is present and the portion where the ink is not present. If the lower side extends to the upper side, the winding of the ink ribbon 4 will gradually shift to the upper side, which may cause a winding disorder. become. When such a turbulence phenomenon occurs, the winding torque increases, and when it reaches an extreme level, there is a problem in that winding failure such as stopping winding is generated.

Conventionally, in order to solve this problem, the thrust surface 5 of the ink ribbon 4 wound around the winding core 3 and the inner wall surface of the ink ribbon cassette 11 have been anticipated in advance of the occurrence of the turbulence phenomenon. In such a case, a measure has been taken to prevent the increase in winding torque by taking measures such as widening the gap between the rollers and placing a thin sheet having a small coefficient of friction in the gap.

[0004]

[Problems to be Solved by the Invention] However, since the above-mentioned method does not prevent the occurrence of the turbulence phenomenon, which is the fundamental cause, when the winding turbulence occurs extremely, the winding torque may be reduced. There were drawbacks, such as an inability to prevent the increase and poor winding.

The present invention has been made in view of the above-described drawbacks, and prevents winding disturbance of an ink ribbon in an ink ribbon cassette, which is a fundamental cause of an increase in the winding torque, thereby reducing the winding torque. It is an object of the present invention to provide an ink ribbon cassette in which the number of windings does not increase and a winding failure does not occur.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the ink ribbon cassette according to the present invention is an ink ribbon cassette for a transfer recording apparatus that transfers ink onto recording paper by heating or striking, and supplies an ink ribbon coated with ink on one side of a film. In addition, in the ink ribbon cassette for winding and storing the transferred ink ribbon, a sheet member is arranged between the ink ribbon thrust surface on the winding and storing side of the ink ribbon cassette and the inner wall of the ribbon cassette opposed thereto. And the sheet member is elastically contacted with the ink ribbon thrust surface.

That is, in the ink ribbon cassette according to the present invention, a sheet member is disposed between an ink ribbon thrust surface on the winding and storing side of the ink ribbon cassette and an inner wall of the ribbon cassette facing the ink ribbon thrust surface. It is designed to be in elastic contact with the ribbon thrust surface, thereby preventing the occurrence of a turbulence phenomenon of the ink ribbon.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to an embodiment. FIGS. 1 to 5 show a first embodiment of the present invention in which the winding of the ink ribbon is prevented. For example, as shown in FIG. 2, the winding core as shown in FIG. 2 is provided between the thrust surface (hereinafter referred to as a winding ribbon surface) 5 of the ink ribbon 4 wound around the winding core 3 and the upper lid 1 of the cassette base 6. 3, two sets of two band-like strips which do not rotate together with the take-up core 3 and extend radially in the radial direction of the take-up core 3, for example, as shown in FIG. An ink ribbon cassette in which the sheet 2 is arranged with the folded flap 21 wound up and the ribbon surface 5 side.

When the ink ribbon 4 is taken up by the take-up core 3, since the folded flap 21 of the sheet 2 is in elastic contact with the take-up ribbon surface 5 as shown in FIGS. Even if the ink ribbon 4 locally expands and contracts due to impact or peeling of the ink, a change in tensile strength occurs, so that the winding position of the ink ribbon 4 is always constant and the ink ribbon 4 can be wound up cleanly. Further, since the elastic contact force of the folding flap 21 is relatively gentle due to the folding of the paper, the frictional resistance hardly affects the winding torque.

As a second embodiment, the seat 2 shown in FIGS. 2 and 3 of the first embodiment may be changed according to FIGS. 6 and 7 depending on the balance with the friction torque. In this manner, the folded flaps 22 each serving as four sets of band-shaped elastic protruding portions which are radially spread in the winding diameter direction of the winding core 3 and are arranged so as to escape in the rotating direction of the ink ribbon 4. May be used with the folded flap 22 side disposed on the rolled-up ribbon surface 5 side.

In the above-described embodiment, the folded flaps 21 and 22 as elastic projections may be configured to be in elastic contact with the so-called winding ribbon surface 5, and the number of folded flaps and the like as elastic projections may be reduced. The number is arbitrary as long as at least three sets are provided in terms of stability.

Furthermore, the material of the sheet and the like are also arbitrary.

[0013]

[Effects of the Invention] According to the present invention, the ink ribbon is wound around the winding core without causing a winding disorder by elastically contacting the thrust surface of the ink ribbon by using the elastic force of the sheet member. This has the effect of providing an ink ribbon cassette that does not increase winding torque and does not cause winding failure.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a configuration of an ink ribbon cassette according to a first embodiment of the present invention.

FIG. 2 is a plan view of the seat according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a first embodiment of the present invention; FIG.
It is A 'sectional drawing.

FIG. 4 is a sectional view of the winding core according to the first embodiment of the present invention;

FIG. 5 is a cross-sectional view showing the first embodiment of the present invention, showing a state in which the folded-back flap elastically contacts the rolled-up ribbon surface.

FIG. 6 is a plan view of a seat according to a second embodiment of the present invention.

FIG. 7 is a view showing a first embodiment of the present invention, and FIG.
It is B 'sectional drawing.

FIG. 8 is a diagram showing a conventional example, and is a configuration diagram of a thermal transfer recording unit using an ink ribbon cassette.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top cover 2, 2 'sheet 3 Take-up core 4 Ink ribbon 5 Roll-up ribbon surface (thrust surface of ink ribbon) 21, 22 Flap flap

Claims (1)

[Utility model registration claims] 1. An ink ribbon cassette for a transfer recording apparatus for transferring ink onto recording paper by heating or striking, supplying an ink ribbon coated with ink on one side of a film, and winding the transferred ink ribbon. In the ink ribbon cassette to be taken in and stored, a sheet member is disposed between the ink ribbon thrust surface on the winding and storing side of the ink ribbon cassette and the inner wall of the ribbon cassette opposed thereto, and the sheet member is placed on the ink ribbon thrust surface. Ink ribbon cassette characterized by elastic contact.