JPS6248564A - Printer - Google Patents

Abstract

PURPOSE:To permit solid printing to be performed at high speeds by a simple mechanism in which a roller-shaped solid printing head is provided on a carriage and pressed on a platen through an ink ribbon. CONSTITUTION:A roller-shaped solid printing head 6 is pivotally supported in parallel with a printing head 3 by an arm 7 on a carriage. The plunger 10 of a solenoid 9 is fixed to the middle portion of the arm 7, and spring 11 physically energized in the opposite direction to the attraction of the solenoid 9 is also attached to the middle portion. When the background, etc. of a paper 1 is coated with a single color, the solenoid 9 is excited and the head 6 is pressed on a platen 2 against the force of the spring 11. When the carriage is moved concurrently, the head 6 is automatically turned and a designated color ink zone of an ink ribbon 4 is transferred to the paper 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printing device, and particularly to a printing device that is a color wire dot serial printer.

[Technical Background of the Invention] A wire dot serial printer prints a collection of dots on paper inserted between a platen and an ink ribbon by exciting the print head while moving a carriage equipped with a print head. was. When printing in color, the ink ribbon is provided with a plurality of color ink bands parallel to the running direction, and the color to be printed is selected by moving the ink ribbon in the vertical direction. However, color printers are often used to print color images, and in order to add color to backgrounds, etc., all-pin printing, which drives all printing pins, is required.
So-called solid printing was performed.

[Problems with background technology] When performing such solid printing, conventional all-pin printing requires printing speed that is slower than normal character printing due to printer power capacity and print head performance. There was a problem that I had to do it.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a printing device capable of high-speed solid printing with a simple mechanism.

[Summary of the Invention] The present invention provides a roller for pressing an ink ribbon against the outer periphery of a platen on a carriage carrying a print head, and enables the roller to be rotated by a driving means in a direction substantially perpendicular to the rotational direction of the platen. It is designed to achieve the intended purpose.

[Embodiments of the Invention] Hereinafter, an embodiment of a printing device according to the present invention will be described with reference to the drawings.6 FIGS. 1 and 2 show an embodiment of the present invention.

In FIG. 1, printing paper 1 is wound around a platen 2. As shown in FIG. A ribbon cassette 5 that accommodates the print head 3 and the ink ribbon 4 is mounted on a carriage (not shown). A carriage is provided so as to be movable along the axial direction of the platen 2, and the print head 3 is arranged to face the print paper 1 on the platen 2.

A roller-shaped solid print head 6 is rotatably supported on the carriage by an arm 7 in line with the print head 3.The arm 7 has one end fixed to a fixed base 8 fixed to the carriage 15. It is made of elastic material. A plunger 10 of a solenoid 9 is fixed to the intermediate portion of the arm 7, and a spring 11 biased in a direction opposite to the suction force of the solenoid 9 is attached to this intermediate portion. Reference numeral 12 denotes a cleaning mechanism formed of an elastic body, which acts as a stopper for the biasing force of the spring 11 and at the same time removes dirt from the solid print head 6 while it is rotating. FIG. 2 is an enlarged front view of the solid print head 6 shown in FIG.
, cyan 4C, and black 4B, which are opposed to magenta 4H.

The operation of this embodiment configured as described above will be described below. To print characters, insert the printing paper 1 between the platen 2 and the ink ribbon 4, and while moving the carriage, excite the print head 3 to print as a collection of dots.The background etc. are printed in the same color. When filling in the paper 1, use a solid printing head drawer.At this time, the solenoid 9 is energized and the head 6 is pressed against the platen 2 against the biasing force of the spring 11.If the carriage is moved at the same time, the roller The shaped head 6 automatically rotates, and a specified color ink band of the ink ribbon 4, for example, 4H magenta ink, is transferred onto the printing paper 1.

When it is desired to fill in the paper 1 in the vertical direction, the platen 2 is rotated and the paper 1 is fed to transfer each line corresponding to the width of the head 6. In addition, in a position where solid printing is not performed, the solenoid 9 is de-energized and the spring 11 is turned off.
The head 6 is separated from the ink ribbon 4 and the platen 2 by the urging force. In this way, solid printing on paper 1 is not performed. Note that by adding a ribbon guide (not shown) between the ink ribbon 4 and the printing paper 1 at a position facing the head 76, the transfer position can be determined accurately. When it is desired to change the color to be transferred, it is sufficient to move the ink ribbon 4 in the vertical direction without changing the position of the head 6, as in the case of printing characters. Since the print head 3 and the solid print head 6 are arranged side by side at a predetermined interval on substantially the same surface, character printing and solid printing can be performed simultaneously by adjusting their relative positions.

According to this embodiment, the printing speed during solid printing can be significantly increased compared to conventional printing devices, and color unevenness is reduced. Further, solid printing can be performed continuously by simply pressing the solid printing head 6 against the platen 2, and since there is almost no turning on/off of excitation to the head 6, the power supply capacity may be small.

Therefore, only the circuit for the solenoid 9 that drives the solid print head 6 is required, and the electrical configuration becomes simple. Furthermore, a cleaning mechanism 12 for the solid print head 6 can be easily added.
Color mixing of the ink ribbon 4 can be prevented.

In the above-described embodiment, a wire dot serial printer has been described, but the present invention can also be applied to other types of printers, for example, and the same effects can be obtained. Furthermore, the driving means for the solid print head 6 is not limited to the solenoid 9, and may be other means.

[Effects of the Invention] As described above, according to the present invention, a roller-shaped solid printing head is provided on the carriage and is pressed onto the platen via an ink ribbon, so that high-speed solid printing can be performed with a simple mechanism. I can now do it.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a printing device according to the present invention, and FIG. 2 is a front view of the main parts of FIG. 1. 1...Print paper 2...Platen 3...Print head 4.
... Ink ribbon 6 ... Solid print head (roller) 9 ... Solenoid (driving means) Agent Patent attorney Nori Chika Ken Shu Sanno - Figure 1 Figure 2

Claims (1)

[Claims] A printing device in which a print head and an ink ribbon are mounted on a carriage movable in the axial direction of a platen, and prints on paper wound around the platen,
A printing device characterized in that a roller for pressing the ink ribbon against the outer periphery of the platen is provided on the carriage so as to be rotatable by a driving means in a direction substantially perpendicular to the rotational direction of the platen.