JPS6132781A - Serial printer - Google Patents

Abstract

PURPOSE:To provide a serial printer prevented from the reception of impact at the time of paper feed by dispensing with the synchronous control of paper feed, constituted by providing a means for scanning printing paper at a speed having a speed component in the direction almost equal to the feed direction of printing paper. CONSTITUTION:When paper 4 is fed upwardly at a constant speed, a printing head 1 prints the paper 4 while obliquely scans the same at a speed wherein the speed component of the printing head 1 in the paper feed direction coincides with the speed of the paper 4. Because the relative speed in the feed directions of the paper 4 and the printing head 1 comes to zero, after all, the same printing as a conventional serial printer for sliding the printing head 1 to the direction at a right angle to the feed direction of the paper 4 after the stoppage of said paper 4 is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a serial printer.〇 [Prior Art] In conventional serial printers, printing paper (hereinafter referred to as paper) is stopped while printing one line, and Synchronous control was required to advance the paper by one line immediately after printing was completed. Further, since paper feeding is performed at high speed in a short period of time, a large mechanical shock is generated during paper feeding. Therefore, the paper feed mechanism has
It needed mechanical strength to withstand the impact.

[Purpose of the invention]

An object of the present invention is to eliminate the need for synchronous control of paper feeding, and
To provide a serial printer that eliminates the shock when paper is fed at 9.

[Structure of the invention]

The serial printer of the present invention is characterized by having a print head for printing on printing paper, and means for scanning the printing paper at a speed having a speed component and a direction substantially equal to the feeding direction of the printing paper. [Embodiment] Fig. 1 shows an embodiment of the present invention, in which 1 is a print head, 2 is a mechanism for sliding the head, 3 is a paper feed 9 mechanism (driving system is omitted), 4 is printing paper, and 5 is a control. Department. When the paper 4 is being fed upwards in the drawing at a constant speed, the print head 1 prints while scanning the paper 4 diagonally at a speed where the speed component of the Rad 1 matches the speed of the paper 4 in this feeding direction. do.

Since the relative velocity of paper 4 and print head 1 in the direction of feed 9 becomes zero, it is possible to print in the same way as a conventional serial printer, which stops the paper and slides the print head in a direction perpendicular to the paper feed direction. Become.

Also, if the relative speed is maintained at zero and the paper feed speed is changed (
In other words, the angle at which the print head slides also changes)) The line spacing can be changed. Note that 5 is a control section.

〔Effect of the invention〕

As described above, according to the present invention, since the paper feeding speed is always constant, mechanical stress is reduced compared to conventional serial printers. Therefore, the mechanical strength of the paper feeding mechanism can be reduced,
Leads to weight reduction and cost reduction. Additionally, the drive motor for feeding the paper requires less torque, and the current flowing through the motor is also reduced, reducing noise. Furthermore, synchronous control of the printing mechanism and paper feeding mechanism is no longer necessary.

(a) to (e) are explanatory diagrams chronologically showing examples of printing by the serial printer of FIG. 1;

1...Print head, 2...Mechanism for sliding the print head, 3...Paper feeding mechanism, 4
. . . Printing paper, 5 . . . Control unit.

Figure l

Claims (1)

[Claims] 1. A serial printer comprising: a print head for printing on printing paper; and means for scanning the printing paper at a speed having a speed component and a direction substantially equal to the feeding direction of the printing paper.