JP3473798B2 - Printing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing device generally called a dot line printer, and more specifically, it mainly relates to a hammer mechanism section having a printing pin developed for printing Chinese characters. The present invention relates to a method for forming a hammer mechanism section having a higher printing force with a printing pin having a larger size for supporting alphanumeric printing.

[0002]

2. Description of the Related Art A dot line printer is characterized in that characters and figures are printed in a dot matrix while reciprocatingly moving a hammer mechanism section in which printing hammers for dot printing are arranged at substantially equal intervals in the digit direction. Have.

This type of printer is a dot line printer for Chinese characters that mainly prints Chinese characters with a dot density of 160 to 180 dots / inch using a printing pin with a diameter of approximately 0.2 mm, and a dot line printer for Chinese characters of 0.3 to 0. 6 using a printing pin of about 4 mm
There are two types of alphanumeric dot line printers that mainly print alphanumeric characters with a dot density of 0 to 90 dots / inch. The printing power of the alphanumeric dot line printer is 1.5 compared to that for Kanji because the size of the printing pin is large.
Approximately twice the printing power is required. Dot printing is performed by a printing hammer provided with printing pins. Although there are various types of printing hammers, the mainstream method is the spring charge type that utilizes the bending energy of the leaf spring.

The printing hammer is formed by joining a printing pin to one end of a hammer spring which is a leaf spring. The printing hammer is attracted to the yoke portion having the magnetic attraction means and held at the non-printing position. The printing hammer is driven by supplying a releasing current having a predetermined pulse width to a releasing electromagnetic coil (hereinafter simply referred to as an electromagnetic coil) arranged on a divided yoke corresponding to each printing hammer.

The performance relating to the printing speed of the hammer mechanism is
It can be expressed by the number of printable dots per unit time.
The number of printable dots is the product of the repetitive operation characteristics of the print hammer and the number of mountings. Therefore, in order to improve the performance, it is necessary to increase the repeated operation characteristics of the print hammer and the number of mountings.

In order to improve the repetitive operation characteristics of the print hammer, it is essential to increase the natural frequency of the print hammer and reduce the equivalent mass (mass converted to the print pin position). To increase the number of printing hammers to be mounted, downsizing in the mounting direction is essential. Realize these while satisfying various restrictions such as securing appropriate printing force, configuration of magnetic circuit that efficiently magnetically attracts individual printing hammers, and restriction of leaf spring stress of printing hammers, using well-balanced technology. I have to let them do it.

Although the above detailed description is omitted, in this type of printing apparatus, this development requires enormous number of personnel, period and cost.

The hammer mechanism designed for printing Chinese characters has an appropriate printing force for a dot size of about 0.2 mm in diameter as described above. Therefore, simply changing the size of the printing pin cannot be used as a hammer mechanism section for alphanumeric printing that requires a large printing force.

As described above, the development of the hammer mechanism section requires high technology, enormous cost, and a long period of time. As a result, only one of the hammer mechanism section for kanji or alphanumeric can be developed. is there. Developing both requires double the cost and time or personnel. In addition, the hammer mechanism parts that can be developed separately are expensive because they have little commonality.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to easily develop a hammer mechanism unit for printing alphanumeric characters based on, for example, a hammer mechanism unit for Chinese character printing. It is to increase the commonality of both hammer mechanism parts and reduce the price.

[0011]

In order to achieve the above purpose, Dottosai
Distributing N print pins for z-printing at substantially equal intervals p in the digit direction
N that adds printing energy corresponding to the installed printing hammer
Magnetic attraction means with print hammer attraction divided into individual pieces
A hammer mechanism section having a hammer mechanism section, a reciprocating means for connecting the hammer mechanism section and reciprocatingly moving in a digit direction, and a paper feeding means for feeding a print sheet, a print hammer suction section of the hammer mechanism section By using a plurality of dot size D (D> d), the printing hammers for printing are brought into contact with the adjacent n printing hammer suction portions, and N / n are arranged at substantially equal intervals n × p in the digit direction. This can be dealt with by forming a hammer mechanism section that is installed.

In addition, in order to increase the printing power, in addition to the above means, the width of the leaf spring of the printing hammer of dot size D is expanded to m times, and the leaf spring is sucked and supported by n printing hammer suction portions. You can respond by doing.

It is appropriate that the value of m be the ratio of the printing power for alphanumeric printing (D) to that for Chinese character printing (d). The value of n is an integer close to the value of m. Generally, the value of m is 1.5 to 2, so the value of n is 2.

[0014]

The width of the printing hammer of the alphanumeric printing hammer mechanism constructed as described above is widened.
The printing power increases almost in proportion to. The attraction to the non-printing position for applying the printing energy to the printing hammer does not cause a problem because the n comb portions of the divided yoke of the magnetic attraction means can be used and a sufficient attraction force can be obtained.

Also, since the magnetic attraction means can be used in common with the Chinese character printing hammer mechanism, it can be manufactured at low cost.

[0016]

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

First, a printing method of this type of printing apparatus will be described with reference to FIGS. 5 and 6 showing a plan view and a sectional view of the printing mechanism section.

The hammer mechanism 10 having the print hammers 11 for dot printing mounted at substantially equal intervals in the digit direction is connected to the shuttle mechanism 20 and reciprocates in the direction of the arrow in the figure. The tape-shaped ink ribbon 31 running on the front surface of the hammer mechanism unit 10 comes out from one end of the ribbon cassette 30, is wound around a pair of ribbon rollers 32 via a ribbon guide 34 and a ribbon sensor 33, and is stored in the ribbon cassette 30. To be done. A platen 4 that supports the printing power of the printing hammer 11.
0 is arranged at a predetermined gap so as to face the hammer mechanism section 10 with the printing paper 50 and the ink ribbon 31 interposed therebetween.

The hammer mechanism portion 10 used here is generally called a spring charge type as shown in FIG. The leaf spring having the print pin 12 for dot printing joined to the tip is the print hammer 11. Printing hammer 11
Is attached to the yoke 16 with screws 14 on the magnetic circuit formed by the comb yoke 17, the magnet 15 and the yoke 16. In this state, the printing hammer 11 is magnetically attracted by the comb yoke 17 and is bent, and has printing energy. The electromagnetic coil 13 is arranged in the comb yoke 17, and a drive circuit (not shown) causes a pulse current to flow in a direction in which the magnetic attraction force of the print hammer 11 is canceled to drive the print hammer 11 to perform dot printing.

In the hammer mechanism portion 10 developed for kanji printing, the spacing between the printing hammers 11, that is, the spacing p between the printing pins 12 is about 0.1 inch in this example. Since the printing range is generally 13.6 inches, the total number of the printing pins 12 corresponding thereto is substantially 136 pins.

Next, the hammer mechanism portion 11 for printing the kanji characters
Will be described with reference to FIG. 3 which is a front view seen from the platen 40 side and FIG. 4 which is a plan view.

The printing hammer 11 has a width w ₂ at the lower end and a width w ₁ at the upper end, and has a substantially rectangular shape, but the width at the upper end side is slightly narrow. This print hammer 11 has a space p in the digit direction.
It is attached to the yoke 16 with screws 14. Com york 1
7 is divided into a comb shape facing each printing hammer 11.
An electromagnetic coil 13 is arranged on each comb. The size d of the printing pin 12 arranged at the tip of the printing hammer 11 is 0.2 mm in diameter.

A printing hammer 11a is developed for alphanumeric printing based on the hammer mechanism section 10 developed for printing Chinese characters described above. Hereinafter, description will be made with reference to FIGS. 1 and 2.

The printing power of the printing hammer 11a for printing alphanumeric characters is about twice as high as that for printing Chinese characters. In order to obtain this double printing power, the widths W ₁ and W ₂ of the printing hammer 11a are set to double the value in this embodiment. Therefore, one printing hammer 11a is sucked by using the two comb portions of the comb yoke 17. The size D of the print pin 12a is about 0.35 mm in diameter. The mounting interval of the printing hammer 11a is 2p and is about 0.
2 inches. Therefore, the number of printing hammers 11a is 13
6/2 = 68 pins. The configuration other than the above is almost the same as the hammer mechanism unit 10 for printing Chinese characters. As can be seen from this content, the hammer mechanism unit 10a for alphanumeric printing has a part having different specifications as compared with the hammer mechanism unit 10 for printing Chinese characters, and the part can be determined by a substantially proportional design. Therefore, it is possible to develop much more easily than the method developed from scratch.

In the above-mentioned configuration, the width of the printing hammer 11a is doubled so that the printing power is doubled as compared with that for the printing of Chinese characters. Therefore, the number of printing hammers is halved. It is a thing. When it is desired to increase the printing power by m times, the width of the printing hammer can be increased by m times, and the comb yokes 17 of the comb yoke 17 can attract the printing power. For the value of n, an integer close to m is selected.

The present invention is not limited to the above-mentioned embodiment, and the mounting specifications when a different dot size is set can be appropriately determined with respect to the relationship between the basic dot size and the print hammer suction portion. .

[0027]

As described in detail above, according to the present invention, a hammer mechanism portion for alphanumeric printing can be easily developed based on the hammer mechanism portion developed for kanji character printing. Furthermore, the commonality of both hammer mechanism parts can be improved and the price can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a printing hammer for alphanumeric printing.

FIG. 2 is a plan view of a printing hammer for alphanumeric printing.

FIG. 3 is a front view of a printing hammer for printing Chinese characters.

FIG. 4 is a plan view of a printing hammer for printing Chinese characters.

FIG. 5 is a plan view of a printing mechanism section.

FIG. 6 is a cross-sectional view of a printing mechanism section.

[Explanation of symbols]

In the figure, 10a is a hammer mechanism, 11a is a printing hammer, 12a is a printing pin, 13 is an electromagnetic coil, and 17 is a comb yoke.

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Claims (2)

(57) [Claims] 1. A printing pin for dot size d printing is arranged in a digit direction.
Marks corresponding to N print hammers arranged at approximately equal intervals p on the
Printing hammer suction unit divided into N to add letter energy
A printing apparatus having: a hammer mechanism section having a magnetic attraction means section including; a reciprocating movement section that connects the hammer mechanism section and reciprocates in a digit direction; and a paper feeding section that feeds a print sheet. Multiple print hammer suction units for hammer mechanism
Pieces using, disposed N / n number at approximately equal intervals n × p digits direction is brought into contact to said n printing hammer suction portion adjacent the printing hammer dot size D (D> d) for printing A printing apparatus having a hammer mechanism section formed by the above. 2. The printing hammer is mainly composed of a leaf spring and the printing pin, and has a substantially equal interval n × in the digit direction.
The width dimension (dimension in the digit direction) of the new print hammer for dot size D (D> d) printing arranged in p is set to the width of the leaf spring of the base print hammer for dot size d printing. In contrast, the printing pin required to obtain the desired printing result
2. The printing apparatus according to claim 1, wherein the printing power is set to m times, which is a ratio of printing power different depending on the size .