JPH052956U - Impact dot head - Google Patents

Abstract

(57) [Summary] [Purpose] In the impact dot head, normal printing can be performed even if the lubricating oil injected into the print wire tip holding portion is transferred to the ink ribbon. A feature of the present invention is that the components of the lubricating oil injected into the lubricating oil injection part 24 are not sparingly soluble in the solvent components of the ink ribbon 20. Further, it is characterized in that the components of the lubricating oil are not sparingly soluble in the dye component of the ink ribbon 20. [Effect] Even if the lubricating oil is transferred to the ink ribbon, the ink component is transferred to the oil transfer portion 25 of the ink ribbon 20 by the lubricating oil.
Since it is not pushed out from the printer, printing defects due to ink loss of the ink ribbon do not occur.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a print head for an impact dot matrix printer.

[0002]

[Prior art]

  In general, the ink of the ink ribbon, the ink ribbon base cloth waste, and the paper dust are impacted. Prevents adverse effects on the operation of the print wire due to invasion of the tip of the print head, Furthermore, in order to prevent sliding wear of the printing wire and the tip guide, Lubricating oil, which has only lubricity, is injected into the print wire tip holding part of the hood.

[0003]

[Problems to be solved by the device]

  However, in the conventional technology, an impact printer is equipped with an ink ribbon. If you leave it on for a long time, the impact dot head print wire tip holding part The lubricating oil injected into the ink ribbon is transferred to the ink ribbon, and the lubricating oil is The ink component of the transferred part (hereinafter referred to as the oil transfer part) is sparingly soluble in the lubricating oil. As a result of the osmotic pressure of the lubricating oil pushing out the ink components from the oil transfer section, As described above, the ink component does not remain in the oil transfer portion 25, and the ink component disappears in white. As a result, the oil transfer unit 2 Even if 5 is hit with a printing wire, ink is not transferred from the ink ribbon to the printing paper. If the printing result is partially missing as shown in 4 and normal printing result is not obtained I had a problem. However, such a problem is caused by the problem shown in Fig. 5 (a). Conventional impact pudding with a structure in which the Pactdot head 23 is mounted horizontally The frequency of occurrence was low.

[0004]   A recent trend of impact printers is that they are capable of handling a wide variety of printing paper. In response to that need, printing paper can be printed with as little deformation as possible. Print paper horizontal insertion type impact printer shown in FIG. The printing paper 21 such as the printing paper front insertion type printer shown in FIG. The printing mechanism of an impact printer that does not wind is used. Water in Figure 5 (b) In a horizontal insertion type impact printer, the impact dot head 23 is It is mounted vertically so that it can be printed on a flat surface. Also, the chlorofluorocarbon shown in FIG. In impact insertion type impact printer, impact dot head 23 is installed diagonally It has been burned. The above-mentioned printing paper horizontal insertion type and printing paper front insertion type impact In the printer, the lubricating oil injected into the impact dot head 23 has the effect of gravity. Phenomenon in which the ink ribbon 20 comes out white because it is easily transferred to the receiving ink ribbon The frequency of occurrence of the is rapidly increasing, and the printing defect accompanying it has become a problem. Also, The impact dot head of the conventional structure with the impact dot head 23 attached horizontally Even in the linter, the gap between the impact dot head 23 and the platen 22 is increased for speed. If you want to improve the responsiveness of the impact dot head 23 by narrowing the The close contact between the compact dot head 23 and the ink ribbon 20 increases, Lubricating oil is easily transferred to 20. For this reason, the impact Even if the print head is attached, the transfer of lubricating oil to the ink ribbon Printing problems due to copying are a problem.

[0005]   The present invention has been made to solve such a problem, and its purpose is to The lubricating oil injected into the print wire tip holding part of the dot dot head Ink component can be retained in the oil transfer portion 25 even when the oil transfer portion 25 is transferred to the oil transfer portion 25. Highly reliable impact dot head that can be printed normally even if it is hit with a letter wire It is in the place of providing.

[0006]

[Means for Solving the Problems]

  The impact dot head of the present invention drives a plurality of printing wires to drive ink revolving. Printing is performed by applying impact force to the paper via the For impact dot heads where lubricating oil is applied to the guides arranged at the edges. And that the components of the lubricating oil are not sparingly soluble in the solvent components of the ink ribbon. Characterize. Furthermore, the components of the lubricating oil are not sparingly soluble in the dye components of the ink ribbon. It is characterized by

[0007]

【Example】

  An embodiment of the present invention will be described below with reference to the drawings.

[0008]   FIG. 1 is a sectional view of an impact dot head 23 of the present invention. Electromagnetic shown in Figure 1 Impact dot that performs printing operation by ejecting the printing wire 7 using force The operation of the head 23 will be described.

[0009]   The coil 16 connected to the printed wiring board 9 is selectively energized according to a print signal. Then, a magnetic circuit including the frame 2, the first yoke 3, the second yoke 4, and the lever 18 is formed. A magnetic flux is generated on the lever 18 and the lever 18 is attracted in the direction of arrow A. Therefore, the lever 18 and The combined printing wire 7 protrudes in the direction A, and the ink ribbon 20, the printing paper 21 and The platen 22 is struck to form dots on the printing paper 21, and printing is performed. End of printing After the completion, the print wire 7 sends a print signal by the impact repulsion force and the return spring 15. Return to the waiting position before the operation. The print wire 7 is an intermediate guide 8 fixed to the nose 1. It is guided and held by the tip guide 10. The tip guide 10 is the tip By the intermediate guide 8 and the nose 1 which are closest to the guide 10, the nose 1 is fixed. The lubricating oil injecting section 24 is configured in this state.

[0010] The ink ribbon 20 and the mark are printed on the lubricating oil injecting portion 24 in the shaded portion at the tip of the printing wire 7. Ink, ink ribbon base cloth waste, and paper dust generated when hitting the letter paper 21 To the operation of the printing wire 7 by entering inside the impact dot head 23 To avoid the adverse effects of It is injected through the lubricating oil injection hole 5 provided in the nozzle 10.

[0011] The opposite ink ribbon 20 is C.I. I. Solvent. Black7 (Nigrosine Base) dissolved in the solvent oleic acid It is composed by dipping it in an ink ribbon base cloth made by weaving polyamide. It Using the ink ribbon 20 and impact dot head 23 manufactured in this way In the impact printer, leave the ink ribbon 20 attached for a long time. Even if the lubricating oil is transferred from the guide hole of the tip guide 10 to the ink ribbon 20, The ink component of the oil transfer part 25 is As shown in Fig.2, they can be mixed with each other without being pushed out of the transfer part by the lubricating oil. Thus, the ink component of the oil transfer portion 25 can be held. Used here The dye component of the ink and the lubricating oil are not soluble in each other. Is held by the lubricating oil instead of being pushed out of the oil transfer section. It is promoting to others.

[0012]   As described above, the ink component of the oil transfer portion 25 can be maintained. Even if the oil transfer part 25 is hit by the printing wire, the ink is transferred to the printing paper and It is possible to perform various printing.

[0013]   The combination of lubricating oil and ink components listed here is an example. And as long as the solubility of the ink dye can be balanced, as long as the above-mentioned combination Absent.

[0014]

[Effect of device]

  As described above, according to the present invention, the tip of the printing wire of the impact dot head is held. The lubricating oil injected into the holding part and the ink component of the ink ribbon can be mixed with each other. Even if the lubricating oil is transferred to the ink ribbon for It is not extruded from and remains in the oil transfer part, so the oil transfer part is hit by the printing wire. Ink is printed normally on the printing paper to realize a highly reliable impact dot head. You can

[Brief description of drawings]

FIG. 1 is a sectional view of an impact dot head showing an embodiment of the present invention.

FIG. 2 is an explanatory view illustrating an effect of one embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a conventional example that does not use the present invention.

FIG. 4 is an explanatory diagram illustrating a conventional example that does not use the present invention.

FIG. 5 is an explanatory diagram illustrating a conventional example that does not use the present invention.

[Explanation of symbols]

1 ... Nose 2 ... frame 3 ... 1st yoke 4 ... second yoke 5 ... Lubricant oil injection hole 6 ... Damper 7 ... Printing wire 8 ... Intermediate guide 9 ... Printed wiring board 10 ... Tip guide 15 ... Return spring 16 ... Coil 18 ... Lever 20 ... Ink ribbon 21 ... Printing paper 22 ... Platen 23 ... Impact Dot Head 24 ... Lubricant injection part 25: Oil transfer section Arrow A: Print wire protruding direction

Claims (2)

[Scope of utility model registration request] 1. Printing is performed by driving a plurality of printing wires and applying an impact force to paper through an ink ribbon,
An impact dot head in which lubricating oil is poured into a guide portion arranged at the tip of the printing wire, wherein the component of the lubricating oil is not sparingly soluble in the solvent component of the ink ribbon. 2. The impact dot head according to claim 1, wherein the component of the lubricating oil is not sparingly soluble in the dye component of the ink ribbon.