JPS59104954A - Wire dot printer - Google Patents

Abstract

PURPOSE:To provide the titled printer capable of making the bending amount of a wire almost uniform even if the numbers of dots are many, constituted by arranging the leading ends of a plurality of printing wire in an almost circular confirugration while providing an operation means so as to arrange the same between a printing data input part and line buffer. CONSTITUTION:Printing wires are arranged and mounted so as to almost position the leading end parts P thereof on the circumfernece of a circle without almost bending the same. A driving magnet Mg is provided to each movable spring piece A and, when a dot pitch is P, the pitch in the longitudinal direction is set to a dot pitch P at the leading end part of each wire while the leading end parts of said wires are arranged on a false circle (n) or n/2 times of the dot pitch P in the transverse direction. An operation part 2 is arranged to the front stage of line buffer 3 and the re-arrangement of data is performed prior to writing the data in the line buffer 3 to achieve speed acceleration.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a wire dot printer, and particularly to a printer having wire dots having a large number of dots, such as 16 or 24 dots.

[Prior art and problems]

Wire dot printers come in a variety of heads, ranging from as few as 7 dots to as many as 7 heads.

In this case, the arrangement of the wire tips P is backsliding if it is arranged in a straight line on the printing surface as shown in FIG.
In the case of a small number of about 7, it is arranged in a single row. In this case, as shown in Fig. 2 (a) and (b), a large number of movable spring pieces A, A, etc. are arranged in a ring R part. A driving magnet M, f'i is arranged for each movable spring piece A (only two magnets are shown in FIG. 2 (A) for simplicity of explanation), and the coil C is energized. Yo! The 70r moving spring piece A is driven to move the wire W attached to it, and its tip P
Note that in FIG. 2(a), only eight pins are shown arranged in two rows for the sake of simplicity of explanation.

By the way, as is clear from FIG. 2 (a), each wire wire A has the same length, so its tips are arranged in a circular shape, but the tips P of each wire W are arranged in a straight line. Therefore, the state of the wire W differs in the amount of deflection depending on the printing element,
As shown in FIG. 2(b), there are wires W with almost no deflection and wires W with a deflection amount δ.

When the number of dot elements is small, such as 7 or 9, the printing element (magnetic) M, consists of 9 movable pieces A, wires W, etc.)'f can be arranged in a special manner to reduce the deflection of each wire. The amount can be kept constant, and since the number of wires is small, the wires can be arranged closely, and the amount of deflection can be reduced.

However, when the number of dots increases to 16 or 24,
This is difficult, and the amount of deflection of each wire becomes non-uniform, making it impossible to equalize the characteristics of each print element of the print head. Therefore, it is only necessary to arrange the parts so that the amount of deflection is constant, but it becomes difficult to process the parts, and this also becomes difficult when the number of dots increases.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned problems and provide a wire dot printer having a printing spatula configured to reduce wire strain to almost zero even when a large number of printing dots are printed. It is to be.

[Structure of the invention]

In order to achieve this object, the wire dot printer of the present invention is equipped with a plurality of movable pieces provided on a matte printing element and a driving means for driving and controlling the movable pieces. The plurality of print wires are arranged in a substantially circular shape, and an arrangement calculation means is provided between the print data input section and the line buffer, and the data to be printed by the plurality of print wires is set in advance in the line buffer. EXAMPLE 0 Before describing the present invention in detail, its outline will be explained with reference to FIGS. 5 and 6. In FIGS. In the present invention, as shown in FIG.
...P6 t-Arrange the wires so that they are located almost circularly rather than in a straight line. Each wire tip P 1 + P 2...
By arranging them in a circle like this, the movable spring pieces that drive the tip of the r-rut can also be arranged radially while equalizing the amount of strain on the wires, so there is no need to bend a particular wire excessively. Even if the wire is deflected, the amount of deflection can be equalized, and therefore the printing spatula) can be constructed from a printing element with equalized characteristics.
When the character pattern shown in the sixth quotient (a) is printed using . . . , the following control is performed. In other words, when moving 2 to print sequentially from left to right on the paper, time T1+
Printing spatula 1 at T2 + Ts + T4...
The wire tip portions P5 and Ps located at the right end of the wire tip portions P1+P2, . . . are in position 2 in FIG.

They are sequentially located at ■, ■, ■, and so on. And in this 7-type dision ■, are the wire tips Ps + Ps both character no? Since it coincides with the turn, as shown in FIG. 6(b), at time T1, the wire tip Ps + Ps
is set to "1" and the others are set to "0". At the next time T2, when the wire tip P5 + Ps is located at position (2), the wire tip P1 + P6 is located at position (2). Therefore, at time T2, only the wire tip P6 becomes "1". Furthermore, at time T3, the wire tip P31
P5 is located at position ■, and the wire tip P1+
P6 is located at position ■, and the wire tip P2eP
Since 4: is located at position ■, only the wire tip P4 becomes "1". In this way, from time T1 to Ty, the control as shown in FIG. If you want to move from right to left or right to print, you need to perform the reverse control of the above.

Next, an embodiment of the present invention will be described based on FIGS. 3, 4, and 7, and with reference to other figures as necessary.

FIG. 3 is a schematic diagram of the printing spatula V of the wire dot printer according to the present invention, and shows an example in which there are eight dot elements. That is, each wire tip P is arranged so as to be located approximately on the circumference. As a result, the movable nose pieces A, A are formed radially from the center point of the ring R, and when the wire forming the wire tip P'ks is attached to the tip of the ring R, almost all of the wires are bent. It can be installed without any trouble.

Of course, in FIG. 3 as well, in order to drive the movable spring piece A, a driving magnet Mf (only one is representatively illustrated in FIG. 3) as shown in FIG. 2 (b) is attached to each movable spring piece. It is set up accordingly.

FIG. 4 shows a case where the number of points is eight.

In this invention, as illustrated in FIG.
In this case, the vertical pitch at the tip of the wire is P, and the horizontal direction is arbitrarily arranged in a near circular place, but the horizontal direction is also at least n or more times this one pitch P (n is an integer of 1 or more). ) The control upper part will be better if placed in a circular shape at the location corresponding to C.
It is necessary to drive and control the tip of each wire at the timing shown in Figure (b).

Conventionally, as shown in Figure 8, nine turns of printing are stored in a line buffer via the CPU, and then recalculated either directly if the wire arrangement is in one row, or shifted by the pitch if the wire arrangement is in two rows. However, in the case of a circular arrangement as in the present invention, if the conventional method is used, it will take a lot of time to rearrange the data, which will hinder high-speed printing. By bringing the data to the front stage of the line buffer, data can be rearranged before being written to the line buffer, making high-speed printing possible.

〔Effect of the invention〕

According to the present invention, the printing elements are arranged in a circular manner, and the wires are arranged in a quasi-circular manner at least n or 7 times the barb pitch at the tip thereof, so that the number of prints is 16 or 24 or more. Even if there is a large amount of strain, the amount of wire strain can be made almost uniform, and as a result, the printing characteristics can be made uniform for each lot, and printing quality defects caused by puffy characteristics can be reduced. C that can be improved

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of the configuration of the printing section of a conventional wire mat printer, FIG. 3 is a schematic configuration diagram of the printing section of the wire mat printer of the present invention, and FIG. Fig. 8g5 is an arrangement diagram for the case a when the number of requests is 611ij in the present invention, Fig. 6 is an explanatory diagram of the control state in the present invention, and Fig. 7 is an illustration of the control state in the present invention. In the figure, 1 is CPU% 2 , 2' is an arithmetic unit, 3 and 3' are line buffers, and 4 is a bald driver. Patent applicant Fujitsu Ltd. agent Patent attorney Akira Yamatani Eisai 3rA 2 Figure 1'4 Notification

Claims (1)

[Claims] In a wire dot printer that is equipped with a plurality of movable pieces provided on a dot printing element and a movement means for driving and controlling the movable pieces, the tips of the plurality of printing wires are arranged in a substantially circular shape, and a print data input section and a line are arranged. A wire dot printer, characterized in that an array calculation means is provided between the printer and the buffer, and data to be printed using the plurality of printing wires is set in advance in the print line buffer.