JPH01204753A - Dot matrix printer - Google Patents

Abstract

PURPOSE:To simply alter dot density without replacing a printing head, by providing the printing head whose inclination can be changed with respect to a moving direction for performing printing and a control part for controlling paper feed, the movement of the printing head and printing corresponding to the inclination of the printing head. CONSTITUTION:A printing head 1 whose inclination can be changed with respect to a moving direction for performing printing, a head feeder 2 for moving the printing head 1 left and right, and a paper feeder 4 for moving paper 3 up and down are controlled by a control part 6. In order to obtain low density printing 27, the printing head 1 may be set at a head position 7 to simultaneously strike printing pins 9-16. In the case of high density printing 28, the printing head 1 is set at a head position 8 to strike a printing pin 9a at first and, subsequently, the printing head 1 is moved by shift quantity 26 in a moving direction 25 by the head feeder 2 to strike a printing pin 10a and the same processing is further performed with respect to printing pins 11a-16a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dot matrix printer with improved print head functionality.

[Conventional technology]

Conventionally, this type of dot matrix printer has had a fixed internal print head.

[Problem to be solved by the invention]

In the above-mentioned conventional dot matrix printer, the print head is fixed, so the dot density is also constant, and therefore, when changing the dot density, the print head must be replaced.

[Means to solve the problem]

The present invention is provided with a print head whose inclination can be changed with respect to the moving direction in which printing is performed, and a control section which controls paper feeding, movement of the print head, and printing in accordance with the inclination of the print head.

[Effect]

In the present invention, the dot density can be changed by changing the inclination of the print head.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

In Figure 1, 1 is a print head whose inclination can be changed with respect to the direction of movement in which printing is performed, 2 is a head feed that moves the print head 1 left and right, 3 is the paper to be printed on, and 4 is the paper 3 that moves the paper 3 up and down. 5 is the ink ribbon that transfers the ink from the print head 1 to the paper 3; 6 is the inclination of the print head 1;

This is a control unit that controls the head feeder 2 and paper feeder 4.

FIG. 2 is a diagram showing the print head 1. As shown in FIG.

In the figure, 7 is the head position when the dot density is low;
8 is the head position when the dot density is high, 9 to 16 are the print pins when the head position is 7, 9a to 1Sa are the print pins when the head position is 8, 25 is the moving direction of the print head 1, 2
6 is the deviation of the printing pins 9a and 10a in each moving direction 25 when the head position is 80.

FIG. 3 is a diagram showing the printing results. In the figure, 27 indicates low-density printing when the dot density is low, and 28 indicates high-density printing when the dot density is high.

Here, in order to obtain low-density printing 2γ, it is sufficient to set the print head 1 at head position T and strike the print pins 9 to 16 at the same time. In addition, in the case of high-density printing 28, first set the print head 1 to head position 8, then hit the print pin 9a, and then press the print head 1.
is moved in the moving direction 25 by a displacement 26 using the head feeder 2 to hit the printing pin 10a, and then the same process is performed for the printing pins 11a to 16a.

As described above, in this embodiment, since the inclination of the print head 1 can be changed, the low density printing 27. Dot density can be adjusted as in high-density printing 28.

〔Effect of the invention〕

As explained above, according to the present invention, since the print head is configured to be tiltable, it is possible to easily change the dot density without replacing the print head.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a plan view of a print head, and FIG. 3 is a diagram showing printing results. 1...Print head, 2...Head feed, 3...Paper, 4...Paper feed,
5... Ink ribbon, 6... Control section.

Claims (1)

[Scope of Claims] A print head whose inclination can be changed with respect to the moving direction in which printing is performed, and a control unit which controls paper feeding, movement of the print head, and printing according to the inclination of the print head. A dot matrix printer featuring