JPH05139007A - Ink ribbon device - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent print stains and improve print quality, and also to improve ink supply efficiency. A first supporting shaft (15) for rotatably supporting the ink impregnated body (11) is attached to an outer peripheral surface (1) of the ink impregnated body (11).
The transfer roller (21) is tilted to the apparatus main body (1) so that the transfer roller (21) comes into pressure contact with only the printing portion (31a) of the ink ribbon (31) on the outer peripheral surface (22).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink ribbon device used in a printer or the like.

[0002]

2. Description of the Related Art FIG. 4 and FIG. 5 show a schematic structure of a conventional ink transfer type ink ribbon device.

In the figure, reference numeral 1 is an apparatus main body. The apparatus main body 1 contains an ink impregnated body 11, a transfer roller 21, an ink ribbon 31, ribbon feed gears 41, 41 and the like.

Here, the ink impregnation body 11 is the main body 1 of the apparatus.
Is rotatably supported via the first support shaft 15A, and the impregnation body 11 is impregnated with ink.

The transfer roller 21 has a second support shaft 25 so that its axis is parallel to the axis of the ink impregnated body 11.
It is rotatably supported by the apparatus main body 1 via. Further, the transfer roller 21 is configured such that the outer peripheral surface 22 thereof is pressed against the outer peripheral surface 12 of the ink impregnated body 11 by the tension of the ink ribbon 31 or the like.

Further, the ribbon feed gears 41, 41 are constructed so as to sandwich and convey the ink ribbon 31 and run the ribbon 31 in a predetermined direction.

Then, the outer peripheral surface 12 of the ink impregnated body 11
When the transfer roller 21 presses the ink, the ink oozes out, and the ink is transferred to the transfer roller 21. Then, the transferred ink is further transferred to the transfer roller 2
Ink is transferred to the ink ribbon 31 which runs while being in contact with 1.

[0008]

In the above-described ink ribbon device, the ink ribbon 31 generally has an unused portion (printing non-use portion) in addition to a portion used for printing (printing use portion). Target.

As described above, when the ink is transferred from the transfer roller 21 to the entire surface of the ink ribbon 31 having the printing use portion and the printing non-use portion, the amount of the transferred ink is not used yet and the amount thereof is not used. May increase and drop from the ribbon, stain surrounding printer parts, and cause deterioration of print quality such as print stains.

Therefore, in order to prevent such inconvenience,
It is conceivable to shorten the width dimension of the transfer roller 21 in contact with the ink ribbon 31. However, in this case, the support of the ink ribbon 31 becomes insufficient, and there is a possibility that the ribbon running may be hindered or damaged.

Further, it is conceivable that the width of the ink impregnated body 11 corresponds to the portion of the transfer roller 21 used for printing. However, in this case, the amount of ink impregnated in the ink impregnating body 11 becomes small, and the ink supply to the ink ribbon 31 becomes insufficient, so that problems such as a decrease in print density are likely to occur.

In view of the above circumstances, an object of the present invention is to provide an ink ribbon device capable of preventing print stains, improving print quality, and improving ink supply efficiency.

[0013]

SUMMARY OF THE INVENTION The present invention comprises a device body,
An ink impregnated body that is rotatably supported by the apparatus main body through a first support shaft, and an outer peripheral surface that is rotatable and has an outer peripheral surface pressed against the outer peripheral surface of the ink impregnated body through the second support shaft. A transfer roller capable of transferring the ink transferred via the ink ribbon to the ink ribbon, wherein the ink ribbon has a printing use portion and a printing non-use portion. The apparatus main body is tilted so that the outer peripheral surface of the ink impregnated body is in pressure contact with only the portion of the outer peripheral surface of the transfer roller that is in contact with the printing use portion of the ink ribbon.

[0014]

According to the present invention, the outer peripheral surface of the ink impregnated body is pressed against only the portion of the outer peripheral surface of the transfer roller that comes into contact with the printing use portion of the ink ribbon by the first support shaft. On this occasion,
Since the volume of the ink impregnated body does not need to be made extremely small, the ink supply to the ink ribbon does not become insufficient. Moreover, since the ink is transferred only to the printing use portion of the ink ribbon via the transfer roller, the ink can be replenished without waste. Further, since the ink is not transferred to the non-printing unused portion of the ink ribbon, the ink is not used and remains in the ink ribbon, and the ink is prevented from dripping.

Therefore, it is possible to improve the printing quality by preventing the printing stains, and to improve the ink replenishment efficiency.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the ink ribbon device according to the present embodiment includes an apparatus main body 1, an ink impregnated body 11, a first support shaft 15, a transfer roller 21, a second support shaft 25, an ink ribbon 31, and a ribbon feed. The gears 41, 41 are included.

The same components as those shown in FIGS. 4 and 5 are designated by the same reference numerals, and the description thereof will be omitted or simplified.

Here, the first support shaft 15 for rotatably supporting the ink impregnated body 11 is the outer peripheral surface 12 of the ink impregnated body 11.
Is the ink ribbon 31 of the outer peripheral surface 22 of the transfer roller 21.
Is tilted (inclination angle θ) in the apparatus main body 1 so as to be in pressure contact with only the portion in contact with the printing use portion 31a. Here, the printing use portion 31a of the ink ribbon 31 is selected so that its width dimension is equal to (or substantially equal to) the printable width a of the print head 8 of the printer shown in FIG.

Next, the operation will be described. In the present ribbon device, the outer peripheral surface 12 of the ink impregnated body 11 is pressed against only the portion of the outer peripheral surface 22 of the transfer roller 21 that contacts the printing portion 31a of the ink ribbon 31 by the first support shaft 15. At this time, the ink impregnated body 11 does not need to have a particularly small volume, so that the ink supply to the ink ribbon 31 does not become insufficient. In addition, the transfer roller 2
Since the ink is transferred only to the printing use portion 31a of the ink ribbon 31 via 1, the ink can be replenished without waste. In addition, since the ink is not transferred to the non-printing portion 31b of the ink ribbon 31, the ink transferred on the ink ribbon 31 does not remain unused and remains, and the ink is prevented from dripping.

According to this embodiment, however, the outer peripheral surface 12 of the ink impregnated body 11 is fixed to the outer peripheral surface 22 of the transfer roller 21 with respect to the first support shaft 15 for rotatably supporting the ink impregnated body 11.
Since the apparatus main body 1 is inclined so that only the portion of the ink ribbon 31 that comes into contact with the printing portion 31a is pressed, it is possible to prevent printing stains and improve printing quality. The supply efficiency can also be improved.

Further, since the constitution is achieved by merely inclining the ink impregnated body 11 with respect to the transfer roller 21 by the first support shaft 15, the structure does not become complicated and large.

[0022]

According to the present invention, the first support shaft for rotatably supporting the ink impregnated body only contacts the outer peripheral surface of the ink impregnated body with the portion of the outer peripheral surface of the transfer roller where the ink ribbon is used for printing. Since the apparatus main body is inclined so as to come into pressure contact, it is possible to prevent print stains and improve print quality, and also to improve ink supply efficiency.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an essential part of an embodiment of the present invention.

FIG. 2 is likewise a perspective view.

FIG. 3 is a perspective view showing a printable width dimension of the print head, which is a reference for setting the width dimension of the printing use portion of the ink ribbon.

FIG. 4 is a diagram showing a schematic configuration of a conventional ink ribbon device.

FIG. 5 is a diagram illustrating a positional relationship between an ink impregnated body and a transfer roller of a conventional ink ribbon device.

[Explanation of symbols]

 1 Device Main Body 11 Ink Impregnated Body 15 First Support Shaft 21 Transfer Roller 25 Second Support Shaft 31 Ink Ribbon

Claims (1)

[Claims] 1. An apparatus main body, an ink impregnated body rotatably supported on the apparatus main body via a first support shaft, and an ink impregnated body having an outer peripheral surface rotatable on the apparatus main body via a second support shaft. And a transfer roller capable of transferring the ink transferred through the pressure contact portion to the outer peripheral surface of the ink ribbon to the ink ribbon, and the ink ribbon has a printing use portion and a printing non-use portion. In the apparatus, the first support shaft is tilted with respect to the apparatus main body so that the outer peripheral surface of the ink impregnated body is in pressure contact with only the portion of the outer peripheral surface of the transfer roller that is in contact with the printing use portion of the ink ribbon. An ink ribbon device characterized by the above.