JPS58185271A - Printer - Google Patents

Abstract

PURPOSE:To obtain a capillary type dot printer capable of smoothly supplying ink by a simplified structure in which cartridg type capillaries integrated with an ink tank are used and an ink-storage liquid absorptive material is packed into the ink tank. CONSTITUTION:A solenoid 21 in the rear of a desired small-tube cartridge 20 is excited and a projection 20D behind the small-tube cartridge 20 is struck by the impaction, and thereby the whole of the small-tube cartridge 20 is pushed out. The tip portion 20A of the small tube 20B is contacted with a printing paper 19 on a platen 18 and dot printing is made. After the printing, the whole of the small-tube cartridge 20 is retracted by the force of a spring 26 and restored to a waiting state. Ink exudes from the liquid absorptive material 30 in the ink tank 20C and is directed to the tip portion 20A through the small tube 20B by a capillary phenomenon.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device, and more particularly to a capillary dot printing device using liquid ink.

Currently, the most common type of dot printer is a wire dot printer, but since wire dot printers use an ink ribbon, an ink ribbon feeding device is essential and the configuration is complicated, and printing is performed by impact via the ink ribbon. Because of this, there was a drawback that the characters being printed could not be seen. In order to solve this problem, a dot printer has been proposed that does not use an ink ribbon but uses a thin tube to supply ink into the thin tube, and prints by bringing the tip of the thin tube into contact with printing paper using an impact force.

FIG. 1 shows a schematic sectional view of a print head 1 of a conventional capillary dot printer. Here, for convenience of explanation, a capillary tube for three dots is shown. Guide 13 provided in 17
．． 14.15, it is slidably supported.

The rear end of the thin tube 10 protruding from the rear of the solenoid is connected to an ink tank 12 via a tube. The ink stored in the ink tank 12 is constantly supplied into the capillary tube 10 by the principle of capillarity, and a protrusion (as shown in the figure) provided on the outer periphery of the capillary tube 10 is driven by the solenoid 11.
By being struck and protruding to the left in the figure, the thin tube 10
The printing paper 19 whose leading end 10A is wrapped around the platen 18
Printing is performed by touching the.

When printing of one dot is completed, the thin tube 10 is released by the spring 16.
It is pulled back to the right in the figure by the urging force of and returns to the standby state.

In the above-mentioned dot printers, the solenoid serving as the driving source is placed between the ink tank and the thin tube, so the ink supply path is inevitably long, and the impact during printing can cause air bubbles to form inside the thin tube. This prevents the smooth supply of ink, which can lead to accidents where dot printing cannot be performed accurately.Also, since the rear end of the capillary needs to protrude from the rear of the solenoid, it is difficult to transmit the driving force to the capillary. The drawback was that the mechanism for doing so was complicated.

Therefore, the present invention has been made in order to eliminate the drawbacks of the conventional capillary type dot printer as described above, and an object thereof is to provide a capillary type dot printing device that has a simple structure and can smoothly supply ink. shall be.

In order to achieve the above object, the present invention employs a cartridge-type thin tube that is integrated with an ink tank, and further employs a configuration in which the ink tank is filled with a liquid-absorbing substance for storing ink.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a sectional view showing an embodiment of the structure of a thin tube cartridge used in the present invention, in which a thin tube and an ink tank are integrated. ink tank 20
G is integrally molded using a flexible material such as plastic, and the ink tank 20C is made of porous plastic or nylon fiber to store ink and allow the ink to flow smoothly. It is filled with a liquid-absorbing substance 30, and the ink is stored by impregnating the liquid-absorbing substance 30.

Furthermore, a protrusion 20D is formed at the rear end of the ink tank 2/OC to engage a spring, which will be described later.

FIG. 3 shows a schematic cross-sectional view of the print head 29 of the capillary type printing device of the present invention, and here, as in the conventional example, a three-dot print head is shown to make the explanation easier to understand.

In the figure, the aforementioned thin tube cartridge 20 has a guide 23.
24.25 is slidably supported by the guide 2.
A spring 26 is disposed between the guide 25 and a protrusion 20D provided at the rear end of the ink tank 20C that protrudes outward from the ink tank 20C.
is locked, and the entire thin tube cartridge 20 is pulled to the right in the figure by its biasing force. Further, a solenoid 21 is provided behind each projection 20D. Furthermore, a platen 18 for winding printing paper 19 is provided at a position directly facing the printing plate 2.

In order to perform a printing operation in the above configuration, the solenoid 21 at the rear of the desired thin tube cartridge 20 is energized,
The impact force causes the protrusion 2 at the rear of the thin tube cartridge 20 to
By hitting 0, the entire thin tube cartridge 20 is pushed out to the left in the figure, and dot printing can be performed by bringing the tip 20A of the thin tube 20B into contact with the printing papers 1 and 9 on the platen 18. Thereafter, the entire thin tube cartridge 20 is pulled back to the right in the figure by the biasing force of the spring 26 and returns to the standby state.

Through the above operations, it goes without saying that the ink seeps out from the liquid-absorbing material 30 in the ink tank 20C and is guided to the tip 20A through the capillary tube 20B due to capillary action.

As is clear from the above description, the present invention employs a structure using a cartridge-type thin tube in which the ink tank and the thin tube part are integrated, so the ink supply path can be shortened compared to the conventional example. Apply ink to the tip)
In addition, printing can be performed simply by impacting the rear part of the thin tube cartridge with a solenoid, and the impact force transmission mechanism can be simplified compared to conventional methods, reducing the manufacturing cost of the device. Can be done.
Furthermore, since the ink tank is filled with a liquid-absorbing material to store the ink, the impact during printing causes the ink to ripple inside the ink tank, preventing ink from being supplied to the tip of the thin tube. This has excellent effects such as being able to prevent ink from being damaged and allowing smoother ink supply.

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view illustrating the structure of a conventional capillary dot printer, Fig. 2 is a sectional view showing the structure of a capillary cartridge used in the present invention, and Fig. 3 is a print head portion of the printing device of the present invention. FIG. 2 is a schematic cross-sectional view showing the structure of FIG. 18...Platen 19...Print paper 20...
・Thin tube cartridge 20B...Thin tube 20C...
Ink tank 21...Solenoid 23.24.
25... Guide 27... Frame Figure 1 Figure 3 Figure 2

Claims (2)

[Claims] (1) A printing device that performs printing by bringing the tip of a capillary tube supplied with ink into contact with printing paper by impact force, characterized in that the capillary tube is integrated with an ink tank for supplying ink. (2) An ink tank configured integrally with the thin tube is filled with a liquid-absorbing substance, and the ink is stored in the ink tank by impregnating the ink with the liquid-absorbing substance. A printing device according to claim 1.