JPS6377775A - Ribbon guide - Google Patents

Abstract

PURPOSE:To reduce an impact sound by contacting under pressure a ribbon guide disposed along the curved surface of a platen with the platen. CONSTITUTION:A plate 7 is secured to a carrier 8 of a mounting base of a print head 1, the end of the plate 7 is engaged with the groove A of a ribbon guide 9, which is affected by the bias force of a spring 10 to press a platen 4 with the groove A as a center and to press a sheet 3 on the platen 4 under pressure. The guide 9 thus matched on the curved surface of the platen 4 presses the sheet 3 to the platen 3 along the platen 4 and contacts the sheet 3 suitably on the platen 3 by suitable pressure. As a result, it can prevent the sheet 3 from being floated at the time of printing, thereby alleviating a printing noise propagated at the sheet 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an impact printer, and particularly to a ribbon guide that is effective in reducing noise during printing.

[Conventional technology]

The prior art will be explained with reference to FIG. Figure 2 shows the printing section of a so-called impact printer.
Due to the printing operation of the print head 1, the ink ribbon 2 paper 6
from the collection of characters or dots on the print head 1.

This is to transfer the characters on the paper. In here.

The disadvantage of the Pact method is that it makes a lot of noise when printing.
It is widely known that the main source of noise is that when paper is suspended above the platen during printing, the sound of collision with the type or the sound of collision between the paper and the platen travels through the paper and becomes a loud noise.

Note that this type of technology is disclosed in Japanese Patent Application Laid-Open No. 60-25782.
There is a number.

[Problem that the invention seeks to solve]

In other words, the conventional technology has a means of bringing the paper into close contact with the platen using a feed roller 5 or a paper holder 6 near the print head, but wrinkles, slack, etc. in the paper cannot be completely removed, and the paper may be slightly The effect on noise reduction was small. An object of the present invention is to provide a ribbon guide structure that brings paper into close contact with a platen and reduces noise.

[Means for solving problems]

The above object is achieved by bringing the ribbon guide along the curved surface of the platen into close contact with the platen surface under pressure.

[Effect]

The ribbon guide, which matches the curved surface of the platen, aligns the paper between the platen and the platen, and at the same time applies appropriate pressure to the paper to adhere to the platen surface, thereby preventing the paper from floating or curling during printing. Propagating printing noise can be reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. The printing operation of the print head 1 hits the platen 4 through the ink ribbon 2 and the paper 3, and transfers the characters made of a set of type or dots of the print head 1 onto the paper.

Here, the plate 7 is fixed to the carrier 8 which is the mounting base of the print head, and the tip of the plate engages with the groove sA of the ribbon guide 9.
The force receiver presses the platen centering around the groove A and brings the paper into close contact with the platen.

Here, the groove A of the ribbon guide, i; i, receives the reaction force due to the pressure of the ribbon guide against the platen, and is always on the plate side.

It is stable when pressed against it and will not come off. Furthermore, the lower part of the ribbon guide? When pressed in the direction of the B force, the play will disengage from the groove 1 and the ribbon guide can be easily removed. According to the invention, the ribbon guide can always be pressed against the platen, and the ribbon guide can be easily removed.

〔Effect of the invention〕

According to the present invention, since the paper can be kept in close contact with the grating at all times, lifting of the paper from the platen can be prevented, and impact noise during printing that propagates through the paper can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of one embodiment of the present invention, and FIG. 2 is a side view of a conventional technique.

Claims (1)

[Claims] 1. In an impact type printer that prints by wrapping paper around a cylindrical platen, a first member is provided along the curved surface of the platen, a second member rotatably supports the first member, and a second member is provided. 1. A ribbon guide characterized in that a strip is provided between a first member and a second member, and the first member is pressed against a platen by the biasing force of the strip.