JPS599352B2 - printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device used in electronic computers, image transmission devices, etc., and particularly to a printing device that includes both a movable head and a fixed head, and is configured to mutually compensate for the drawbacks of only one printing device. The invention relates to a printing device.

In other words, a printing device with only a movable head is preferable because it can print while sequentially checking input information from a keyboard, etc., but there is a limit to the speed of the movable head in order to process a large amount of print information such as output information from a computer. This is clearly a disadvantage. Furthermore, in a printing device with only a fixed head, the opposite occurs.

In view of the above points, the present invention provides a printing device that is equipped with both a movable head and a fixed head, thereby improving operability and improving overall printing speed. FIG. 1 shows the printing surface of the print head mechanism section of the printing device according to the present invention as seen from the printing paper side, and is movable to the left and right along a shaft 2 provided at the upper part IA of the carriage 1. A head 3A and fixed heads 3B arranged in a line at the lower part IB of the carriage 1 are provided.

The print heads 3A and 3B are, for example, thermal dot print heads, and are 4×5, 5×7, 1×5, 1×7, 5
*400) Various types of heating dots such as 7x500 can be taken. In addition, various other light emitting elements, inkjet, discharge, current-carrying needles, etc. are possible, and appropriate combinations thereof are also easy. FIG. 2 is a perspective view of FIG. 1, showing a state in which the movable head 3A is used.

The movable head 3A is pressed against the printing paper 5 by a spring 6 via a link mechanism 10. The wire 4 is driven by the operation of the motor M1 based on a command from the control circuit CC, and the movable head 3A connected thereto moves left and right on the shaft 2 for serial printing based on print information from the control circuit CC. Performed on paper 5. A cross-sectional view at this time is shown in FIG. 3A.

When switching the print head to the fixed head 3B, as shown in FIG. After separating from the paper 5, the franchisor P2 is operated to rotate the carriage 1 around the IC and move it to the position shown in FIG. 3C.

Further, the plunger P1 may be released to press the fixed head 3B against the printing paper. The printing paper is fed by a friction roller 7 driven once by a motor M2. The above-mentioned operations are performed by commands from the control circuit CC. The printing device according to the present invention configured as described above has a low speed mode using a movable head and a high speed mode using a fixed head.For printing by input from the keyboard KB, the low speed mode is used as shown in FIG. 3A. When performing serial printing and printing a large amount of output from a computer via line 17, it can be switched to the high-speed mode as shown in FIG. 3C and used as a line printer. Furthermore, as in this embodiment, by configuring the apparatus so that the printing positions of both heads are aligned by rotating the carriage to which the print head is attached, printing in both of the above modes can be mixed in one line. is also possible.

Furthermore, as a matter of course, if it is not necessary to align the printing positions of both heads, print head 3A as shown in FIG.
, 3B are fixed, the mechanism can be simplified.

Of course, even in this case, the fixed head 3B and the movable head 3A
It is possible to align the printing positions of both heads by moving the printing paper 5 forward or backward by the deviation α in the printing positions. In addition, in this embodiment, as shown in FIG.
The carriage 1 with the print head attached is configured to rotate around the rotating shaft 1C, but as shown in Figure 5, the motor M
It is also possible to align the printing positions of the movable head 3A and the fixed head 3B by moving the carriage 1 in the direction of the arrow by rotation 3.

(FIG. 5 shows the printing state by the fixed head 3B at the printing position β) In addition, in this embodiment, when the movable head and the fixed head are fixed to a single carriage (as mentioned above, As shown in FIG. 6, it is also possible to provide both heads in separate carriages.

FIG. 6A shows the use of movable head 3A, with movable head 3A fixed to carriage 11 and fixed head 3B fixed to another carriage 12. FIG. When a fixed head is used, the carriage 11 is rotated about the shaft 11C by a known means (not shown) as shown in FIG. The purpose can be achieved if it is moved by the following means. As is clear from the above-described drawings, it is desirable to arrange a fixed print head near the feeding side and a movable print head near the discharge side with respect to the printing paper.

The reason for this is that, as is clear from FIG. 3A, the printing results can be confirmed one after another during serial printing using the movable head. If these arrangements are reversed, there will be an inconvenience that during serial printing, the printed characters will be cut even by the fixed head and cannot be confirmed.

[Brief explanation of drawings]

Fig. 1 is a plan view of one embodiment of the present invention from the printing surface;
The figure is a perspective view, Figures 3A, B, and C are sectional views showing each state, Figure 4 is a diagram showing another embodiment, Figure 5 is a diagram showing still another embodiment, and Figure 6 is a diagram showing another embodiment. Figures A and B are diagrams showing each state of still another embodiment. 3A: Movable head, 3B: Fixed head.

Claims (1)

[Scope of Claims] 1. A dot print head that is movable in the paper width direction of printing paper and a line-shaped dot print head that is fixedly arranged in accordance with the paper width of the print paper, and that both the heads are switched. A printing device characterized in that it is used. 2. The fixedly arranged line-shaped dot print head is arranged near the feed side of the print paper, and the dot print head movable in the paper width direction of the print paper is arranged near the discharge side of the print paper. A printing device according to claim 1, characterized in that: