JPH0710615B2 - Color printer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A color printer device using two ink ribbon cassettes for black and color, and prevents blank ejection when the black cassette is erroneously mounted when it should be in color. Therefore, the size of the black ribbon cassette and the color ribbon cassette is changed, and a stopper for fixing only the black ribbon cassette is provided on the main body of the device, and when the black ribbon cassette is attached, the cassette cannot be shifted to prevent blanking. It is possible.

[Industrial application field]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color printer device, and more particularly, to a shift mechanism for an ink ribbon cassette thereof.

[Conventional technology]

FIG. 5 is a diagram for explaining an ink ribbon mechanism portion of a conventional color printer device. As shown in FIG. A, an ink ribbon 1 divided into several colors is accommodated in a cassette, the ribbon cassette 2 is mounted on a ribbon frame 3 as shown in FIG. B, and the ink ribbon 1 is printed by a ribbon guide 4. 5 between the platen 6 and the guide rod
Printing is performed on the paper 9 on the platen 6 by the print head 5 which reciprocates left and right on 7, 7 '. The color to be printed is selected by rotating the ribbon frame 3 about its fulcrum 3a, and at the same time, the ribbon guide 4 is rotated.
Is moved to set the required color portion of the ink ribbon 1 at the print position of the print head 5.

[Problems to be solved by the invention]

In addition to color printing, the above-described color printer device can also print with a black monochromatic ribbon. However, if the black ribbon cassette is mounted on the ribbon frame due to an operator error when color printing is to be performed, and the black ribbon cassette is shifted by the same shift amount as the color ribbon cassette, the width of the black ribbon becomes larger than that of the color ribbon. Since it is narrow, there is a problem in that information is erased because the ink is shot off the print head.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a color printer device having a simple structure and preventing blank ejection.

[Means for solving problems]

FIG. 1 is a diagram for explaining the principle of the color printer device of the present invention, where a shows the case where a color ribbon cassette is used and b shows the case where a black ribbon cassette is used.

1A and 1B, 10 is a color ribbon cassette containing a color ribbon, 11 is a black ribbon cassette containing a black ribbon, 12 is a ribbon frame, 13 is a pin for rotatably supporting the ribbon frame, and 14 is a ribbon frame. The platen, 15 is a stopper.

In the figure, the rear end of the color ribbon cassette 10 does not reach the stopper 15 and can rotate about the pin 13 as shown by arrows A and B, so that the color ribbon can be shifted.

In FIG. 2B, the black ribbon cassette 11 has a rear end longer than that of the color ribbon cassette 10 and is prevented from rotating by the stopper 15.

Therefore, in the case of color printing, even if the black ribbon cassette is erroneously attached, blank ejection is prevented.

[Work]

Even if the black ribbon cassette is erroneously attached when color printing is to be performed as shown in FIG. 1b, the stopper 15 prevents the rotation and prevents the blank ejection.

〔Example〕

FIG. 2 is a top view for explaining the embodiment of the present invention. In the figure, 20 is a print head, 21 is a carrier with a print head, 22 is a ribbon guide, 23 is an ink ribbon, 24 is a guide bar for guiding the carrier with a print head to the left and right, and 25 and 26 are the main body of the apparatus. , 12 is a ribbon frame for mounting the ribbon cassette, 13 is a pin for swingably supporting the ribbon frame, 12a is a stopper for restricting the forward rotation of the ribbon frame, and is a portion A surrounded by a chain line. Is a stopper mechanism 27 which is the main point of the present invention.

FIG. 3 is a diagram for explaining a portion A in FIG. 2, a is an exploded perspective view seen from the Z arrow direction in FIG. 2, and b is an assembled view thereof. In the figure, 12 is a ribbon frame, 30 is an actuator, 31 is a stopper, 32 is a torsion coil spring, 33
Is a tension spring and 34 is a pin. These members are assembled as shown in FIG.

That is, the pin 34 is inserted through the torsion coil spring 32, the stopper 31, and the actuator 30 in this order, and these are rotatably fixed to the ribbon frame 12. In this case, the spring locking piece 30a provided on the actuator 30 is inserted into the square hole 31a of the stopper 31. The torsion coil spring 32 has an actuator at one end.
The other end of the actuator 30 is engaged with the stopper 31 to urge the stopper 31 clockwise and the actuator 30 counterclockwise.
However, the rotation of both is regulated by the square hole 31a of the stopper 31 and the spring locking piece 30a of the actuator 30. One end of the tension spring 33 is attached to the spring locking piece 30a of the actuator 30,
The other end is locked to the spring locking piece 12b of the ribbon frame 12 to bias the actuator 30 counterclockwise. Therefore, the projection 30b at the tip of the actuator 30 projects from the square hole 12c provided in the ribbon frame 12.

The operation of the present embodiment thus constructed will be described with reference to FIG. In the figure, a is a side view, b is a view taken in the direction of the arrow Y in FIG. A, and the reference numerals of the respective members are the same as those in FIG.

First, when the color cassette 10 is mounted on the ribbon frame 12 as shown in FIG. A, the stopper 31 does not act because it does not contact the actuator 30. Therefore, the ribbon frame 12 can be freely rotated around the pin 13 as a fulcrum. It can be moved and the ink ribbon can be shifted.

Next, when the black ribbon cassette 11 is attached to the ribbon frame 12, the rear portion of the cassette pushes down the protruding portion 30b of the actuator 30. For this reason, the stopper 31 rotates counterclockwise as shown in FIG. Therefore, even if the ribbon frame 12 is rotated about the pin 13 as a fulcrum in the direction of arrow A, the stopper 31 comes into contact with the frame 26 and cannot rotate. Further, in the direction of arrow B, it cannot be rotated by the stopper 12a provided at the left end of the ribbon frame as described in FIG. Therefore, the black ribbon cassette 11 cannot be rotated to either A or B and is in a fixed state. When the black ribbon cassette 11 is mounted and the ribbon frame 12 is located at a position other than the position shown in FIG. A, the stopper 31 contacts the side surface of the frame 26, but the actuator 30 compresses the torque spring 32 and rotates. It is possible to avoid overloading each part. Further, the reason why the black ribbon cassette 11 is inclined and fixed as shown in Fig. A is that the black ribbon accommodated in the cassette is an endless loop in the shape of Mobius strip.
This is because the upper and lower sides are used with the center of the ribbon width as a boundary.

〔The invention's effect〕

As described above, according to the present invention, with a very simple structure, it is possible to prevent blank ejection due to erroneous mounting of the ribbon cassette, which is extremely useful in practice.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the principle of a color printer device of the present invention, FIG. 2 is a top view for explaining an embodiment of the present invention, and FIG. 3 is a stopper mechanism portion of an embodiment of the present invention. FIG. 4 is a diagram for explaining the operation of the embodiment of the present invention, and FIG. 5 is a diagram for explaining the ink ribbon mechanism portion of the conventional color printer device. 1 to 4, 10 is a color ribbon cassette, 11 is a black ribbon cassette, 12 is a ribbon frame, 13 is a pin, 14 is a platen, 15 is a stopper, 20 is a print head, 21 is a carrier, and 22 is a ribbon. A guide, 23 is an ink ribbon, 24 is a guide rod, 25 and 26 frames, 27 is a stopper mechanism portion, 30 is an actuator, 31 is a stopper, 32 is a torsion coil spring, and 33 is a tension spring.

Claims (1)

[Claims] 1. A color ribbon cassette containing a color ink ribbon is mounted on a swingable ribbon frame, the ink ribbon of the cassette is inserted between a platen and a print head, and the ribbon frame is rotated to obtain a desired shape. When a black ribbon cassette (11) containing a black ink ribbon is used in a color printer device that sets the color portion of the black ribbon cassette at the printing position and performs printing, the rear portion of the black ribbon cassette (11) is the color ribbon cassette (11). 10) A stopper mechanism (27) that is longer and contacts the rear portion of the black ribbon cassette (11) to disallow rotation of the black ribbon cassette (11).
A color printer device characterized by being provided.