JPS6078760A - Ink type wire dot printer - Google Patents

Abstract

PURPOSE:To simplify the printing mechanism of an ink type wire dot printer by eliminating the needs for the electric controller of ink feeding by a method in which ink is stored in the internal hollow of a damper in the rear of the head and connected to the inking portion of the printing head by an ink supply tube. CONSTITUTION:When a printing head 9 starts printing, a damper 1 is pressed by the restoring force of the head 9 to push out ink in the damper 1. Ink is passed through an ink-sending tube 2, supplied to the inking portion of the tip of the head 9, and adhered to the tips of wires 6. Since the number of hammers to be attached to the damper 1 differs to each other according to the letter pattern of printing, the amount of ink to be supplied to the head 9 is different. Since the amount of ink to be used in printing is directly proportional to the amount of ink to be supplied, proper amounts of ink can be supplied to the printing head 9.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an ink-type wire dot printer that prints by depositing ink on the tip of a wire.

<Prior art> Conventionally, most wire dot printers use ink ribbons, which have a short lifespan and must be replaced frequently, and require an ink ribbon feeding mechanism, which reduces the structural strength of the printer. It has the disadvantage that it becomes complicated.

In order to eliminate this drawback, an ink-type wire dot printer was devised that prints by applying ink to the tip of a wire without using an ink ribbon. Patent application 1978-1078
It is explained in detail in No. 81.

As shown in FIG.
Then, ink is sent to the ink-attached portion at the tip of the print head 9 to perform printing.

Pump 11 using a motor as the power for feeding the ink
was necessary. Therefore, a pump control circuit, a pump drive circuit, and a pump drive power source are required, making the structure complicated.

Furthermore, it is difficult to control the amount of ink required depending on the print pattern.

Purpose of the present invention The present invention eliminates the above-mentioned drawbacks, and its purpose is to eliminate the need for an electrical control section for ink feeding.
To provide an ink type wire dot printer with a simple printing mechanism.

<Example> FIG. 1 shows an example of the present invention, which will be described in detail.

Reference numeral 1 denotes a damper, which is hollow and made of a hard material such as polyacetal, and stores ink inside.The ink is circulated between the ink adhesion part at the tip of the print head 9 and the damper by an ink transport tube 2. is connected to.

For printing, the print head 9 moves left and right, and according to signals sent from a control circuit, the coil 4 is energized, the hammer 3 is attracted, and the print wire 6 is pushed forward.

This action causes the print paper 8 to collide with the platen 7. Moreover, after printing, the printing wire 6
The return spring 5 returns the hammer 3 to its original position while pushing it. At this time, a considerable amount of pressure is naturally applied to the damper 1. When the print head 9 starts printing, its return force pressurizes the damper 1 and pushes out the fluid ink inside the damper. The fluid ink passes through the low ink tube 2;
The ink is supplied to the ink adhesion section at the tip of the print head and adheres to the tip of the wire. Inside the ink feeder 2, there is a check valve 1.
0 is provided to supply ink in a fixed direction.

Furthermore, in the print head 9, the number of hammers that hit the dampers differs depending on the character pattern to be printed, so the amount of ink supplied to the print head also differs, and the amount of ink used for printing is directly proportional to the amount of ink supplied. Therefore, an appropriate amount of ink is supplied to the print head.

The entire damper 1 may be made of polyacetal or the like, or only the portion that is in contact with the hammer may be made of polyacetal or the like, and the other portions may be made of a different material such as gold porcelain.

When the ink inside the damper 1 runs out, the damper 1 is replenished with ink as appropriate.

As another embodiment, FIG. 2 shows an ink-type wire dot printer in which an ink tank 12 for supplying fluid ink to the damper 1 is separately provided.

This ink tank 12 is connected to the damper 1 by an ink supply gourd 13, and when the damper 1 returns after the hammer pressurizes the damper 1 and supplies ink, the ink tank 12 Since fluid ink is supplied from the damper 1 to the damper 1, it is possible to reduce the need for ink replenishment.

As described above, the ink-type wire dot printer of the present invention can automatically supply an appropriate amount of fluid ink to the print head when printing, making it possible to simplify the main body of the printer device. .

Further, according to the structure of the present invention, since the ink tank is pressed in accordance with the frequency of operation of the wire, the consumption amount and supply amount can be balanced even when complex control is performed.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an ink-type wire dot printer of the present invention, in which 1 is a damper, 2 is an ink feeding tube, 6 is a hammer, 4 is a coil, 5 is a return spring, 6 is a printing wire, and 7
is a platen, and 8 is a printing paper. FIG. 2 shows another embodiment, and 12 is an ink tank. FIG. 3 shows a conventional ink type wire dot printer. Applicant: Epson Corporation Agent, Patent Attorney: Tsutomu Mogami

Claims (1)

[Claims] In an ink-type wire dot printer that is configured to print by depositing ink on the tip of a wire, the damper at the rear of the head, which receives pressure when the wire returns, is hollow inside to store ink, and is connected to an ink supply pipe. An ink-type wire dot printer characterized in that it is connected to an ink adhesion section of a print head.