JPH0439438B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] A ribbon guide for a color printer that has two guide parts, a guide part for the color ink ribbon and a guide part for the black ink ribbon, to prevent ribbon misalignment. It is possible to prevent blank shots caused by.

[Industrial application field]

The present invention relates to a ribbon guide for a color printer.

FIG. 4 is a diagram for explaining a conventional color printer. As shown in figure a, ink ribbons 1 divided into several colors are stored in a cassette, and as shown in figure b, this ribbon cassette 2 is mounted on a ribbon frame 3, and the ink ribbon 1 is moved to a printing head by a ribbon guide 4. Printing is performed on a sheet 9 on a platen 6 by a print head 5 on a carrier 8 which is inserted between a carrier 8 and a platen 6 and reciprocates left and right on guide rods 7, 7'.
And select the color to print in ribbon frame 3.
The ribbon guide 4 is rotated about the fulcrum 3a at the center, and the ribbon guide 4 is moved to set the desired colored portion of the ribbon 1 at the printing position of the printing head 5.

[Problems to be solved by conventional technology and invention]

The color printer mentioned above had only one ribbon guide like a normal printer. Therefore, if you use ink ribbons with different ribbon widths, such as color ribbons or black-specific ribbons, ribbon misalignment may occur, causing blank printing, and ribbons with different widths may have different loads applied to each ribbon. There was a problem that the ribbon could become sagging, causing loss of synchronization.

The present invention was created in view of these points, and it is an object of the present invention to provide a ribbon guide that has a simple configuration and does not cause blank firing or step-out.

[Means for solving problems]

Therefore, in the present invention, a color ink ribbon and a black-only ink ribbon whose ribbon width is different from the color ink ribbon are used, and the ink ribbon is guided between the printing head and the platen. In a color printer having a ribbon guide, the ribbon guide 10 has color ribbon guide parts 11, 11' and a black ribbon guide part 1.
Two ribbon guide parts 2 and 12' are provided, and each of the ribbon guide parts 11, 11', 12, and 12' has a pair of guides for both the color ribbon and the black ribbon. It is characterized in that the intervals for color ribbons with a large ribbon width are made larger than those for black ribbons.

[Effect]

By providing two ribbon guide parts for the color ribbon and the black ribbon in the ribbon guide of the color printer, it is possible to prevent blank printing due to ribbon misalignment when using the black ribbon, which is narrower than the color ribbon.

〔Example〕

1 and 2 are diagrams showing an embodiment of the present invention, FIG. 1 is a perspective view, and FIG. 2 is a -
FIG.

In this embodiment, as shown in FIGS. 1 and 2, 1
The two ribbon guides 10 are provided with color ribbon guide parts 11, 11' and black ribbon guide parts 12, 12' having matching ribbon widths.
The color ribbon guide parts 11, 11' are arranged outside the black ribbon guide parts 12, 12'.

In FIG. 1, the ribbon guide 10 is constructed by inserting holes drilled in the centers of the black ribbon guide parts 12, 12' into guide pins 14, 14' implanted in a metal fitting 13 attached to the carrier. The locking part 1 is movable to
A locking spring 16 is locked in a plurality of recesses formed in the parts 5 and 15', so that it can be stopped at a plurality of locations.

In this embodiment configured as described above, the guide portions for the color ribbon and the black ribbon are separate, so there is no fear of dry firing even when using the black ribbon.

Further, as shown in FIG. 2, the color ribbon 17 is guided by the guide parts 11 and 11', and the black ribbon 18 is guided by the guide parts 12 and 12', so that the color ribbon 17 is guided by the black ribbon at a higher angle than the black ribbon. It becomes shallower than ribbon 18. Therefore, the running resistance of the color ribbon 17, which has a large ribbon width, and the black ribbon 18, which has a narrow ribbon width, can be made almost equal.

In addition, as explained in FIG. 1, the ribbon guide 10
is movable up and down on the guide pins 14, 14', and when a color ribbon is used, a predetermined color can be selected and guided to the printing position of the print head. An example of a vertical drive mechanism for the ribbon guide 10 in this case is shown in FIG. In the figure, 20 is a carrier, and a print head 2 facing the platen 21
2 and a ribbon guide 10, the guide rod 2
3,23' can be moved left and right. Reference numeral 24 denotes a ribbon frame on which a ribbon cassette 25 is mounted, and is rotated about a shaft 28 by a cam 27 attached to a motor 26. 29 is a shift lever, one end of which is rotatably supported by the carrier 20 via a shaft 30;
The other end is engaged with the left and right pins 10a of the ribbon guide 10, and a roller 31 provided in the middle
is engaged with a rail 32 provided in the longitudinal direction of the tip of the ribbon frame 24. When selecting a desired color portion of the color ribbon, the ribbon frame 24 is rotated by the cam 27, and the ribbon guide 10 on the guide pin 14 moves the shift lever 29 in synchronization with the inclination of the ribbon frame 24. is driven up and down through the

〔Effect of the invention〕

As described above, according to the present invention, by providing one ribbon guide with two guide portions for color ribbon and black ribbon, it is possible to prevent blank firing when using black ribbon, and this is practical. Extremely useful.

[Brief explanation of drawings]

1 and 2 are diagrams showing an embodiment of the present invention, FIG. 1 is a perspective view, and FIG. 2 is a -
3 is a diagram showing an example of a ribbon guide shift mechanism, and FIG. 4 is a diagram for explaining a conventional color printer. In FIGS. 1 and 2, 10 is a ribbon guide, 11 and 11' are color ribbon guide parts, and 1
2 and 12' are black ribbon guide parts, 13 is a metal fitting,
14, 14' are guide pins, 15, 15' are locking parts, 16 is a locking spring, 17 is a color ribbon, 1
8 is a black ribbon.

Claims (1)

[Claims] 1. A color ink ribbon and a black-specific ink ribbon whose ribbon width is different from the color ink ribbon are used, and the ink ribbon is guided between a printing head and a platen. In a color printer having a ribbon guide, the ribbon guide 10 is provided with two ribbon guide parts: a color ribbon guide part 11, 11' and a black ribbon guide part 12, 12', and the ribbon guide part 11,
11', 12, and 12' each have a pair of guides for color ribbons and black ribbons, and the distance between each pair of guides is made larger for color ribbons with a larger ribbon width than for black ribbons. Ribbon guide for color printers featuring 2. The ribbon guide 10 is slidable along guide pins 14, 14' provided on the carrier 20 in synchronization with the shift for selecting the desired color of the colored ribbon. Ribbon guide for color printer described in item 1.