JP3306653B2 - Dot line printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a print head of a dot matrix type printer, and realizes a printing speed higher than the conventional one by thinning out printing dots by using a thinning font. Also, the present invention relates to a dot line printer capable of obtaining high-precision printing quality.

[0002]

2. Description of the Related Art FIG. 1 shows details of a case where a character "A" represented by a dot matrix of 24 dots vertically and 24 dots horizontally is printed by a conventional dot line printer. The vertical direction in the figure is a direction perpendicular to the moving direction of the print head. FIG. 2 shows the character "A" when the character of FIG. 1 is printed using a thinned font in a direction perpendicular to the direction of movement of the print head, that is, in the vertical direction of the figure. Dots are omitted.

FIG. 3 shows a configuration of a print head of a conventional dot line printer for printing the character "A" shown in FIG. 1 and a printing method. The print head uses a 12-pin print head H. The print pins provided on the print hammer are sequentially shifted in a direction perpendicular to the moving direction of the print head by one dot pitch when characters are represented by a dot matrix of 24 dots vertically and 24 dots horizontally. Is printed once, and the print head is moved twice to print the character "A" of 24 dots vertically.

When printing a thinned character "A" by using a thinning font as shown in FIG. 2, the printing hammer is thinned and the operation is performed so that 24 dots in the vertical direction are thinned out. . In this case as well, the movement of the print head H is required twice as in the case where no thinning is performed.

As described above, in the conventional dot line printer, each print pin P is
Are arranged by the number of dots that can be printed at the same time in one movement, and the printing pins P are arranged without any gaps. There is a problem that even if the printing dots are thinned, the printing speed is not improved. Moreover, when the dots were thinned out, the printing quality deteriorated.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a dot line printer capable of improving the printing speed and realizing high-precision printing quality.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first invention is to provide a dot line type in which a dot matrix type print head swings right and left to perform printing. In a printer, print pins of a print head are arranged such that dots printed by one movement of the print head are separated from adjacent dots by at least one dot in a direction perpendicular to the direction of movement of the print head. When arranged at predetermined intervals in a direction parallel to the direction of movement of the print head, when thinning printing is performed in the direction perpendicular to the movement of the print head,
A dot line printer characterized in that the printing speed in the case where the dot arrangement and the print pin arrangement remaining without being thinned out have the same interval is reduced to twice or more.

According to a second aspect of the present invention, in a dot line printer in which a dot matrix type print head swings right and left to perform printing, two or more dots in a direction perpendicular to the moving direction are obtained by one movement of the print head. A print head that prints at the same time a vertical head that is simultaneously printed is composed of a plurality of dots vertically and horizontally, and a print head that has a dot gap in the vertical direction is provided, and one or more dots are printed between dots A dot line printer characterized in that the printing speed is doubled or more by performing printing with a portion not to be printed.

According to a third aspect, in the dot line printer according to the first aspect, a single movement of the print head causes
After printing two or more dots in the direction perpendicular to the movement direction, the characters in the vertical direction to be printed simultaneously are composed of a plurality of dots in each of the vertical and horizontal directions. A dot line printer characterized by printing a non-printing portion of one or more dots in a subsequent printing operation.

[0010]

In a dot line printer having a print head according to the present invention, when printing a print pattern thinned by a thinned font, the number of times of right and left swings of the head can be reduced to less than half that of the conventional print head. Therefore, high-speed printing can be realized. In addition, when printing is performed using a thinned font, not only a thinned print pattern is printed, but also a non-thinned print pattern can be printed in one reciprocal printing operation as in the conventional printing operation. Printing quality can be realized.

[0011]

FIG. 5 shows the structure of a print head HX according to an embodiment of the present invention capable of printing 12 dots by a single movement of the print head, and a character "A" (D) which is not thinned out using a normal font. FIG. 1) is a diagram showing a printing method when printing is performed. The printing hammers are provided by shifting the printing pins P of each printing hammer by one dot pitch in the vertical direction.
In order to print 24 dots vertically, the print head HX needs to be moved twice as in the conventional print head.

FIG. 6 is a diagram showing a printing method when a thinned font "A" (FIG. 2) is printed using a thinned font by the print head of the present invention. Since the distance between the dots is 12 and the interval between the dots and the interval between the print pins are the same, the head needs to be moved only once. In this case, the printing speed can be doubled because the number of head movements is half that of the conventional machine.

FIG. 7 is a diagram showing a case where the characters of FIG. 1 are printed in a direction parallel to the direction of movement of the print head, that is, using a font which is thinned out in the left and right direction of the figure. Of the dots arranged, only the right dot is omitted. Since the response speed of a normal hammer has an upper limit, the thinning method can double the moving speed of the print head.

FIG. 8 shows a case where a font is used in which the characters of FIG. 7 are thinned out in a direction perpendicular to the direction of movement of the print head, that is, in the vertical direction of the figure. When printing is performed with this print head, a printing speed twice as high as that in FIG. 7 and four times as high as that in FIG. 1 can be obtained.

The print head of the present invention is characterized in that the hammer pin interval is the same as the dot interval thinned out in the vertical direction. This makes it possible to improve the printing speed by a factor of two by vertical thinning and to use it together with horizontal thinning. For example, it is possible to obtain a dot line printer having a mode of four times the printing speed. Further, high-precision printing quality can be realized by a simple printing method.

[Brief description of the drawings]

FIG. 1 is a diagram showing a character “A” represented by a dot matrix of 24 dots vertically and 24 dots horizontally.

FIG. 2 is a diagram when the characters in FIG. 1 are thinned in the vertical direction of the figure.

FIG. 3 is a plan view showing the structure of a conventional print head capable of printing 12 dots by moving the print head once.

FIG. 4 is a diagram showing a printing method when the characters of FIG. 2 are printed by a conventional print head.

FIG. 5 is a plan view showing the structure of a print head according to the present invention, which can print 12 dots by moving the print head once.

FIG. 6 is a diagram illustrating a printing method when the characters of FIG. 2 are printed by the print head of the present invention.

FIG. 7 is a diagram when the characters of FIG. 1 are thinned out in the left-right direction of the figure using the print head of the present invention.

FIG. 8 is a diagram in a case where the characters in FIG. 7 are further thinned out in the vertical direction of the figure.

[Explanation of symbols]

 HX print head P print pin

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B41J 2/515 B41J 2/485 B41J 2/51

Claims (3)

(57) [Claims] In a dot line printer in which a dot matrix type print head swings right and left to perform printing, a print pin of the print head is moved by a single movement of the print head so that a dot to be printed is moved by the print head. In the direction perpendicular to the direction, it is arranged at least one dot away from the next dot, and at predetermined intervals in the direction parallel to the direction of movement of the print head, and thinned out in the direction perpendicular to the movement of the print head. A dot line printer characterized in that the printing speed when the thinning-out is performed so that the dot arrangement and the print pin arrangement which remain without being thinned out at the same interval when performed is more than doubled. 2. A dot line printer in which a dot matrix type print head oscillates left and right to perform printing, in which a single print head movement prints two or more dots in a direction perpendicular to the moving direction. The head is equipped with a print head that is composed of multiple dots in the vertical direction that are printed simultaneously in the vertical direction with a plurality of dots in the vertical direction and has a gap between dots in the vertical direction, and printing with one or more non-printing parts between dots A dot line printer characterized in that the printing speed is improved by a factor of two or more. 3. A dot line printer according to a first aspect of the present invention, in which a single print head movement prints two or more dots in a direction perpendicular to the movement direction, and simultaneously prints in the vertical direction. A dot comprising a plurality of dots in each of a vertical and horizontal direction of a character, and a printing operation in which a dot gap is provided in a vertical direction, and a non-printing portion of one or more dots between dots is printed in a subsequent printing operation. Line printer.