JPS59150766A - Heat sensitive recording head - Google Patents

Abstract

PURPOSE:To make it possible to print a character or an oblique character having a different size, by respectively arranging a plurality of lines each comprising a plurality of heat generating elements arranged at predetermined pitches at angles different with respect to the moving direction of a head. CONSTITUTION:One of line driving terminals 1A-1E is selected corresponding to the inclination angle of an oblique character to be printed and voltage sufficient to generate heat from a heat generating resistor R is applied to the selected one through line driving wirings 3A-3E. At the same time, the selective voltage OV from a character pattern generator is applied to element driving terminals 21- 2n and a current is supplied to the heat generating resistor R through a diode D to print the oblique character. On the other hand, when a max. character is printed, the line driving terminal 1A is selected while, when a next smaller character is printed, the line driving terminal 1B is selected and the element driving terminals 21-2n are successively selected to perform printing. By this mechanism, the oblique characters or the characters having a different size can be printed without providing a separate heat sensitive head by a single character pattern generator.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a thermal recording head for a thermal printer.

[Technical background of the invention]

In a conventional thermal recording head for a serial type thermal printer, multiple heating elements are arranged on a substrate at the same pitch perpendicular to the direction of conveyance of the recording paper. By moving the recording paper in this direction, characters and the like are printed in a matrix on the recording paper.

[Problems with background technology]

However, in the heat-sensitive recording head of such a conventional thermal printer, the size of the printed character is fixed depending on the length of the arrangement of the plurality of heating elements. Therefore, the only way to change the size of printed characters during a printing operation is to provide a character pattern generator for each character size or to replace the thermal recording head.

In addition, the shape of the printed characters depends on the direction of movement of the thermal recording head,
The number of letters determined by the direction in which the heat generating elements are arranged is limited to characters within a substantially rectangular area formed within the IJ sock. Therefore, in order to print italic characters, it is necessary to either install a new character pattern generator for italic characters, or to install a separate thermal recording head with heating elements arranged at an angle with respect to the conveyance direction of the recording paper. was there.

[Purpose of the invention]

The present invention has been made in order to solve the above-mentioned drawbacks, and is a thermal printer for thermal printers that can change the size of characters during printing and can also print italic characters at the same time. The purpose is to provide a recording head.

[Summary of the invention]

In order to achieve the above object, the present invention has a plurality of rows of a plurality of heating elements arranged at a predetermined pitch, and each row is arranged at a different angle with respect to the moving direction of the thermal recording head. It is characterized by:

[Embodiments of the invention]

FIG. 1 is a front view showing an embodiment of the present invention, /A,
/B, 10. /D, /E are column drive terminals, 2/, yuko,...2n are element selection terminals, 3A, jB.

30.3D, JF! Symbols are column drive wiring, 4/, 11, . . . are cable selection wires, R is a heat generating resistor, and j is a board on which these are mounted.

Further, FIG. 2 is a circuit diagram of FIG. 1, and confectionery having the same structure as in FIG. 1 is indicated by the same reference numerals, and D is a diode for preventing current leakage.

First, the operation of printing diagonal characters on the heat-sensitive recording device configured as described above will be described.

First, according to the inclination angle of 1g of the italic character to be printed, the column operating terminals /A, /B, /C! :
/T), /E are selected by a selection circuit (not shown), and a voltage sufficient to cause the heating resistor R to generate heat is applied to the terminals by a driving circuit (not shown). At the same time, a voltage Ov is selectively applied to the element drive terminal according to pattern data from a character pattern generator (not shown). Therefore, the current is the column drive wiring, ? A, 3B;
30. Pass through 7 of 3D and JE, heat generating resistor F, and diode D to element selection wiring/, Q,...
..., Xu+ element 2/ for element blocking.

, 2.2, ...... leads to un.

FIG. 3 shows an example of printed italic characters, in which the number of dots is smaller than that in FIG. 1 and is represented by t-dots. Third
Figure (A) shows an example of printing when the column drive terminal /A is selected, and the figure (0) shows the case where the same <10 is selected.

To explain the operation in more detail with reference to FIG. It is moved in a direction perpendicular to the conveyance direction of the recording paper by a pulse motor (not shown). Next, the element selection terminals 2/, 2, 23, 1□, and 2 corresponding to the first column in the character matrix are selected, and the heating resistor F generates heat. Finally, the third
The element selection terminal 26 corresponding to the column is selected, and the heat generating resistor B generates heat. In this way, the italic characters r/J are formed in a matrix according to the pattern data from the character pattern generator, and the character pattern dissolves the ink on the transfer paper and the characters are printed on the recording paper.

By doing the above, it becomes possible to generate clumsy italic characters with a single character pattern generator without increasing the number of character pattern generators.

Next, the case of printing characters of different sizes will be explained based on this embodiment. Figure 1 is an explanatory diagram showing an example of the printing. The same figure (A) shows an example of printing when the column drive terminal /A is selected, the same figure (B) shows the same when /B is selected, and the same figure (0) shows the same when /C is selected. .

Here, when printing the largest character, the same operation as in Figure 3 (Shu) is performed when printing an italic character.Next, when printing a small character in /steps, first The drive terminal /B is selected, and at the same time, as shown in FIG. 3(B), the element selection terminals are first 22, then the terminals corresponding to the dots diagonally above, and finally the terminal 26. "/" is formed.

FIG. S is an explanatory diagram showing an image on the character pattern generator. When printing the largest characters, each column is output as shown in A, but when printing smaller characters, it is configured as shown in B, and it is easier to understand if you think that it is output for each column. becomes. That is, the pattern is edited so as to cancel the physical slope of the resistor F driven by the column drive terminal. To be more specific, the readout from the character pattern generator is read out for each column in the same way as the maximum character display, but
The read pattern data is stored in a buffer memory (not shown), and by sequentially reading out the data, printing is finally performed with no inclination as shown in FIG. 9(B).

With this configuration, characters of different sizes can be printed using seven character pattern generators.

Note that while the character height is reduced as shown in FIGS. 7(B) and (0), reduction in the width direction can be achieved by changing the sequential scanning time of each element selection terminal of the thermal recording head.

〔Effect of the invention〕

As explained in detail above, according to the present invention, the present invention has a plurality of rows of a plurality of heating elements arranged at the same pitch,
Since each row is arranged at a different angle to the conveying direction of the thermal recording head, a single character pattern generator is used without increasing the number of character pattern generators, and a separate thermal recording head is provided. It becomes possible to generate the italic characters ak without any errors. Furthermore, it has the advantage that characters of different sizes can be printed at each stage.

[Brief explanation of the drawing]

FIG. 1 is a front view of a thermal recording head according to the present invention, FIG. 1 is a circuit diagram of the head, and FIGS. 3 (A), (B),
(0) are pattern diagrams showing printing examples of italic characters, respectively;
7(A), 7(B), and 7(0) are pattern diagrams showing printing examples of characters of different sizes, respectively, and FIG. 7 is an explanatory diagram showing an image on the character pattern generator. /A, /B, 10. /D, /FL... Column drive terminal, 2
/ , 22 , 23 , P-2n ・-Element selection terminal, 3A, 3B, , 70, 3D, ? E Column drive wiring, q. 13... Wiring for element selection, R... Resistor for heat generation, S... Board. Applicant's agent Kiyoshi Inomata 3 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A plurality of heating element rows each consisting of a plurality of heating elements arranged at a predetermined pitch are arranged at different angles with respect to the moving direction, and while selectively heating the heating elements,
A thermal recording head that prints on a recording medium by moving it.