JPS60187562A - Serial type dot printer - Google Patents

Abstract

PURPOSE:To enable high density printing and to facilitate processing, assembling and adjustment while reducing the number of parts, by providing a leaf spring and a yoke formed from a rectangular plate material so as to connect the outer peripheral parts thereof and a core wherein an iron core and a yoke are molded integrally. CONSTITUTION:A printing head is constituted of leaf springs 6 formed from a rectangular plate material 14 so as to connect the outer peripheral parts thereof to said plate material, yokes 16 formed from a flat plate material so as to connect the outer peripheral parts thereof to said plate material and a core 15 wherein an iron core and a yoke are molded integrally. By a magnetic circuit constituted of a parmanent magnet 12, a yoke 13, the iron core 10, an armature 8 and the yokes 16, a coil 11 is excited to the hammer 16 attracted to the end surface of the iron core 10 against the spring force of the leaf springs 6 and the magnetic flux of the permanent magnet 12 is negated to operate the hammer 18 and a printing pin 7 is impinged to an ink ribbon and paper to form one dot. The attachment position of the printing pin 7 is determined by the hole 19 of each leaf spring 6 and the positional determination of the leaf springs 6, the yokes 16 and the core 15 is performed by aligning the outer peripheral parts thereof. Because the leaf springs 6, the yokes 16 and the core 15 are respectively formed of one member, the number of parts can be reduced to a large extent.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention is a serial type dot printer.

[Prior art and one point in between]

Traditionally, the dot matrix printers used in word processors, etc., have been predominantly U-dot-type, in which one character is composed of a vertical dot matrix. Demand for density is increasing.

Therefore, it is desired to produce a high-density printer in which the size of the characters is the same as that of the conventional printer, and each character is composed of a matrix of more than 100 x 100 dots. However, conventional wire dot type serial printers and dot type line printers cannot achieve high density printing for the following reasons:

In wire dot type serial printers, the Ibaraki printing wire is focused on a very narrow area of the printing surface.

For this reason, (2) the circumferential shape (2) bending the printing wire from the bonding surface of the hammer part and the printing wire to the printing surface using a guide such as the printing wire (2. At the joint surface of the printing wire, the printing wire must be removed using a method such as a hammer part (2. Brazing) to avoid contact with the adjacent wire in a very narrow area. In C2, which increases the printing dot density without changing the size, it is necessary to make the printing wire thinner, but the diameter of the printing wire that has been used conventionally is smaller than 1iit [+ etc.] during printing. Second, it is easy to bend, and the tg reliability decreases.Furthermore, it is technically difficult to join a large number of printing wires and marking parts within a very small area of the joining surface. It is difficult to manufacture a print head that can perform confidential printing due to reliability and manufacturability.

Therefore, a dot-type line printer was developed that prints without using a printing wire. In this printer, a short printing pin attached to a hemlock (''') made of a comb-shaped leaf spring is aligned with the direction of movement of the printing medium. Vertical (tilting direction)
21 straight, 〃 shape (2, the same length as the width of the printing medium, equally spaced (2 devices), and the JSS mother attached to the machine base is swung by the length of the gap printing pin pitch, While keeping the timing in mind, repeat each comma once. Printing is performed by moving the dot by one dot pitch and driving the double mark 11. This printer does not use wires and only needs short printing pins.

To increase the density, simply reduce the tip diameter of the printing pin. However, since this type of printer requires a large number of printers, it requires a source of two large volumes (h) to drive the printer, and a source for swinging the printer with the printer attached. Since a large, special drive device is required, the printer has the disadvantage of being expensive and being overused.

Therefore, in the present invention, the printing pin is placed on a straight line having a constant inclination with respect to the scanning direction of the printing mechanism (two devices,
In order to drive the printing pin 7, the printing pins (two corresponding plate springs are arranged vertically in different directions), without using wires, and similar to a two-imprinter (two-many one-man and special An improved serial type printer has been invented that does not require an extensive rocking mechanism.

However, this type of print head has two iron cores and an iron core (
A driving magnetic circuit consisting of two permanent magnets held between two head bases (two head bases made of non-magnetic material such as aluminum) is attached to the upper and lower two stages, and one printing pin (two For this reason, the armature suction part on the end face of the iron core and the printing pin installation required positioning work (secondly, high-precision jigs and long A adjustment were required). Moreover, there were disadvantages such as requiring a large number of parts and requiring a large number of assembly steps.

[Purpose of the invention]

The present invention was developed in view of the early autumn described above, and aims to provide a low-cost printer that is capable of high-density printing, easy to process, assemble, adjust, etc., and has a small number of parts.

[Summary of the invention]

According to the present invention, when the printing mechanism is placed on a straight line with a constant inclination with respect to the fixed direction of the printing mechanism (= a dot printer with printing pins arranged (-), the outer periphery from a rectangular plate is It is characterized by having a plate spring formed so as to connect (2), a yoke formed so that the outer peripheral part of the rectangular plate material is connected (= formed), and a core formed integrally with the iron core and yoke.The above configuration Therefore, it is possible to provide a low-cost printer that is easy to process, assemble, adjust, etc., and has a small number of parts.

〔Effect of the invention〕

According to the present invention (2. On a straight line with a constant inclination with respect to the scanning direction of the printing mechanism (2.
2. The formed leaf spring is connected to the outer periphery of the rectangular plate material (= the formed yoke and the integrally formed core that is the iron core and the yoke (2) It is easy to mold each part. , and the assembly time can be significantly shortened (2), and the number of parts can also be reduced.

[Embodiments of the invention]

The present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view of a printer according to the invention.

In the same figure (=, 1 is the print head, 2 is the guide rail,
3 is a platen, 4 is printing paper, and 5 is an ink ribbon. Printing is done in the same way as a conventional wire dot serial printer (as shown below).

The print head 1 is attached to a carriage 9, and the carriage 9 reciprocates on the guide rail 2 by a motor, etc. (within the range shown by the two-dot line in the figure), which is wider than the width of the printing paper. While adjusting the movement and timing of the print head 1, each print hammer (not shown) is driven to print on the print paper 4 via the ink ribbon 5.

After one line of printing is completed, the next line is printed by reversing the moving direction of the carriage and feeding the printing paper 4 by one line.

FIGS. 2 and 3 are a front view and a side view showing the basic structure of the print head of the printer of the present invention.

6 is a leaf spring, 7 is a printing bottle, 8 is an armature, 9 is a carriage, IO is an iron core, 11 is a coil, 12 is a permanent magnet,
13 indicates a head base.

The printing arm 8 consists of a leaf spring, a printing pin 7, and an armature 8 made of a magnetic material attached by means of brazing or the like to form a magnetic circuit. First, the magnetic attraction force of the permanent magnet 12 (two forces), the spring force of the leaf spring 6 (two forces), and the iron core end face (two forces, held by the hammer 1)
! 3 (On the other hand, when the coil 11 (2) is energized, the magnetic field of the permanent magnet is canceled out and the magnetic field of the permanent magnet is canceled out. Figure 2 (
= As shown, the (-1) printing pins 7 are placed on a straight line (2, and at equal intervals (2), and the top and bottom are different (=). As a result, the pitch between the printing bins is small υ, and the coil and iron core As shown in Figure 2, the width l of the printing bins at both ends is one character (two characters). Corresponding angle (- tilt carriage 9 (
2. While the carriage 9 moves between both ends of the printing paper (= each -, the mark is driven and printing is performed. As a result,
A print head capable of high-density printing can be easily realized.

However, with the conventional print head, it takes a lot of time to assemble the armature of the iron core (2), and to position the printing pin of the armature of the iron core and the position of the printing hem (9). It had the disadvantage of being shingled and having a large number of parts.

Fig. 4 is a front view showing an example of a plate spring for use on two sides of the printing mark of the present invention, and Fig. 5 is a perspective view showing an example of a core part used in the printing mark of the invention. Figure 7 is a perspective view showing an example of the printing mark according to the present invention (2);
FIG. 8 is a side view showing one embodiment of the print head according to the second embodiment, and a front view showing the relationship between the armature and the yoke of the print head according to the present invention.

The print head according to the present invention is constructed so that the outer periphery is connected to the two rectangular plates 14 shown in FIG. It is composed of a yoke 16 formed in the same manner as shown in FIG.

The operation method of one hem is 12 permanent magnets, 13 yoke, 1 iron core.
0, armature 8, and yoke 16 (
= From the lower part of Fig. 7 (= The spring force of the toothpick plate shown in Figure 7) To cancel the magnetic flux of the ink ribbon (not shown), the magnetic flux of the ink ribbon (not shown) is canceled.

Paper (= printing pin 7 collides to form one dot.

As described above, the position of the printing pin 7 is determined by the hole 19 of the leaf spring 6, and the position of the leaf spring 6, yoke 16, and core (Can be done from two points.Also (=, plate spring 6 yoke 1
Since each of the six cores 15 and the like is formed from one member, the number of parts can be significantly reduced, and a low-cost printer can be provided.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the overall configuration of the printer, and FIG. 2 is a front view showing the basic configuration of the print head of the printer of the present invention.
Figure 3 is a side view of the print head of the printer in Figure 2;
The figure is a front view showing a specific example of a leaf spring used in a printer (second side) according to the present invention, FIG. 5 is a perspective view showing a specific example of a core part according to the present invention (second side), and FIG. FIG. 7 is a side view showing an embodiment of the print head according to the present invention, and FIG. 8 is a perspective view showing a specific example of the print head according to the present invention (2). 6: Leaf spring 7: Printing pin 15: Core 16: York agent Patent attorney Kensuke Chika (and one other person) No. 2
Figure 2 Figure 3 Figure 5 Figure 7 Figure 1?

Claims (1)

[Claims] An ivy dot printer with printing pins arranged so that they are on a straight line with a constant inclination relative to the printing mechanism's running direction (2), so that the outer periphery of the rectangular plate is connected (= A serial type dot printer characterized by having a wedge, a yoke formed so that the outer periphery of a rectangular plate is connected, and a core made by integrally molding an iron core and a yoke.