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Point-and-raw type printer

A printer and line-type technology, which is applied in the field of dot-line printers, can solve the problem of lower positioning accuracy of the platen roller and achieve the effect of easy position replacement

Inactive Publication Date: 2008-06-25
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the length of the platen roller is shortened, the Figure 12 The length of the platen roller 25 in the F direction and the mandrel 28 together, just can not determine the arc center Pb of the platen roller in the platen roller frame as the rotary axis of the platen roller rotation, the positioning accuracy of the platen roller reduce
[0011] In addition, for the purpose of making the striking surface of the hammer 1 as close to the plane as possible, it is also proposed to extend the arc center of the platen roller, but if the arc center of the platen roller is extended, the platen roller cannot be determined in the platen roller frame. The center of the arc, the positioning accuracy of the platen roller is reduced

Method used

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  • Point-and-raw type printer
  • Point-and-raw type printer
  • Point-and-raw type printer

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Experimental program
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Embodiment Construction

[0034] Hereinafter, the present invention will be described with reference to the drawings.

[0035] figure 1 It is a right side view (partial sectional view) showing the structure near the platen roller of the dot line printer. figure 2 It is viewed from the direction of G figure 1A schematic representation of the A-A' section of . A platen roller 5 having an arcuate cross-sectional shape and composed of a hard rubber portion 5 a and a mandrel portion 8 is disposed at a position facing the hammer set 1 . The front-back direction (H direction) of platen roller 5 is positioned by contacting with the tension force of tension coil spring 13 on the tie bar 12 of platen roller 5 and paper feeding with L-shaped platen roller base 11. The platen base 11 is disposed near both left and right ends of the platen 5 and has a cross-section of substantially the same arc shape as the platen 5 with a radius r centered on the arc center Pa of the platen 5 .

[0036] In addition, in the ...

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PUM

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Abstract

The present invention enables the shift of a platen striking face position to be accurately performed in a dot line printer which has a platen with a circular arc-like shape and can not use the circular-arc core as a rotary shaft of platen pivot. The platen performs the positioning in a fore- and aft-direction by pressing against a block with cross section of the shape of a circular arc centered on the circular arc core of the platen while performing the positioning in an up and downward direction by pressing downward with a spring force generating means.

Description

technical field [0001] The present invention relates to a dot line printer, in particular to a paper feeding mechanism. Background technique [0002] Figure 7 and Figure 8 A schematic configuration of a typing mechanism unit of an example of a dot line printer is shown. A hammer set 1 having a plurality of hammers 10 (for example, refer to Patent Document 1) is reciprocated in a lateral direction (arrow A direction in the figure) by a shuttle mechanism not shown. In addition, the hammer set 1 is arranged in a state of facing the platen roller 25 supporting the printing force with the ink ribbon 2 and printing paper 3 moving in the direction of the arrow C sandwiched between them. In this state, the hammer 10 is driven every appropriate time to print text, graphics, etc. on the printing paper 3 in the form of a dot matrix. The printing paper 3 is conveyed in a vertical direction in due course by the paper feeding mechanism part 6 equipped with the tractor 4 and the paper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/31B41J9/00B41J11/04
Inventor 铃木直人根矢福治
Owner RICOH KK