JPH0820105A - Type-printing printer - Google Patents

Abstract

PURPOSE:To make an effect of printing in one color equivalent to that obtained by printing in two colors by a method wherein types formed on a type belt are constructed of three blocks of a first type block comprising symbols, a second type block comprising ordinary figures and a third type block comprising figures shown in dotted lines. CONSTITUTION:A type belt 3 used in a type-printing printer is constructed with a reference position 31 serving as a reference for printing and a plurality of type blocks comprising individual types provided to its outer peripheral surface. Namely, a first type block 32 comprising of symbols 21a, a second type block 33 comprising of ordinary figures 21b and a third type block 34 comprising figures 21c shown in broken or dotted lines are provided. The type blocks 32-34 are formed in the order as mentioned above in the direction the same as turning of the type block 3, starting from the reference point 31. Thereby, printing in a line printed with the figures 21b of the second type block and printing in a line printed with the figures 21c shown in dotted lines of the third type block show different printing patterns.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a type printer.
In particular, it relates to the structure of a type belt used in a type printer.

[0002]

2. Description of the Related Art A type printer installed on a recent calculator is required to be compact and lightweight. In order to meet this demand, a type printer using an endless type belt has been conventionally proposed (Japanese Utility Model Application No. 56-193015 (Japanese Utility Model Application Laid-Open No. 58-99045).
No. 62-4447 (Jitsukai Sho 6)
No. 3-113647), such as a microfilm obtained by photographing the contents of the specification and drawings attached to the application).

A schematic structure of this conventional type printer will be described with reference to FIG. As shown, the drive pulley side 1 and the driven side pulley 2 are arranged with a predetermined gap,
In the meantime, the endless print belt 3 is stretched. A worm 5 is attached to the rotating shaft of one DC motor 4 which is a drive source.
The driving force of the motor 4 is transmitted to the main gear 8 via the first idle gear 6 and the second idle gear 7. The rotational force from the main gear 8 is transmitted to the drive side pulley 1 via a spring clutch, and the main gear 8 has a printing / carrying gear 9
Can be engaged.

The printing / carrying gear 9 has a printing / carrying shaft 1.
One end of 0 is connected, and the printing / carrying shaft 10 is arranged between the driving side pulley 1 and the driven side pulley 2 and extends parallel to the type belt 3.

A hammer holder 11 is attached to the printing / carrying shaft 10.
Is mounted slidably in the axial direction, with a hammer,
A carry / paper feed cam and a rack release lever are built in and supported. One end of a spring 12 for holder return is connected to the hammer holder 11, and the other end of the spring 12 is fixed to the base. The hammer holder 11 is always moved to the home position side near the driven pulley 2 by the pulling force of the spring 12. Elastically biased.

A rack 13 is arranged in the vicinity of the printing / carrying shaft 10 in parallel with it, and rack teeth formed on the rack 13 are carried in the hammer holder 11.
It can be selectively meshed with the paper feed cam.

A paper feed roller 14 and a flat guide plate 15 which also serves as a platen are arranged behind the rack 13.
The paper 16 is sent out from below the paper feed roller 14 and the guide plate 15 and guided near the outside of the type belt 3.

Numeral 17 is a selection lever for transmitting the rotational force of the main gear 8 from the driving pulley 1 to the printing / carrying gear 9 at a predetermined timing and transmitting the same.
8 operated. A position detector 19 is provided near the drive pulley 1 to detect a reference position for selecting a character and a character position. Reference numeral 20 denotes an ink roller, which is in contact with a type formed on the outer peripheral side of the type belt 3 to apply ink to the type surface.

A series of basic operations of this type printer includes a type selection operation, a printing / carrying operation, a hammer holder return / paper feeding operation, and these operations are sequentially repeated. By this, a large number of lines are printed.

The type belt 3 in this type printer
As shown in FIG. 5, a large number of characters 21 are individually provided on the outer peripheral side at a predetermined pitch along the circumferential direction, and a large number of belt tooth portions are provided on the inner peripheral side at a predetermined pitch along the circumferential direction. 22 are provided, and the individual characters 21 and the belt tooth portions 22 are provided so as to be paired with each other, that is, at the same pitch.

Further, each of these characters 21 is a type block 23 in which characters having a low printing frequency, such as symbols "+", "-" and "=", are collected on the endless belt circumference. And is arranged so as to be divided into the type blocks 24 in which the type numbers which are frequently printed are collected, and no character is formed at the boundary between the type blocks 23 and 24. Further, the printing speed is improved by repeatedly providing a plurality of type blocks 24 each of which is a typeface having a high printing frequency.

Further, this type belt is provided with a type portion 25 corresponding to the reference position detected by the position detecting portion 19 described above.

[0013]

By the way, the type printer having the above-mentioned structure is used by being mounted on a calculator, but it is used in order to calculate "-" or to express the numerical value of "-". Two-color printing of black and red is performed using ink. In order to perform the two-color printing, two ink rolls of red and black are provided, and the inks of the respective colors are applied to the printing characters to perform the printing. In this case, red and black inks will be applied to the same type of characters, and color mixing will occur, and printing quality will deteriorate.Therefore, a type block corresponding to each color is formed, and a dedicated type for each color is formed. Ink of a specific color is selectively applied to a print character.

However, when two ink rolls are provided and printing is performed by changing the ink color at the time of printing, the number of parts increases and it is necessary to change the color of the applied ink, so that an ink roll selection mechanism is necessary. However, there is a problem that the structure becomes complicated and the cost increases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a type printer that can obtain the same effect as when printing with two colors using only one color ink. It was made as.

[0016]

In order to achieve the above-mentioned object, the present invention selects a desired type from a large number of types of an endless type belt having a plurality of types formed on the outer peripheral portion, In a type printer that prints the selected type with a hammer, the type formed on the type belt is formed by a first type block made of symbols, a second type block made of ordinary numbers, and a broken line. It is characterized in that it is composed of a third type block made up of the selected numbers.

[0017]

The above means operates as follows.

In the present invention, by providing the type block composed of the numbers formed by the broken lines, the printing pattern can be differentiated between the printing by the normal type and the printing by the type formed by the broken line. This makes it possible to obtain almost the same effect as when printing two colors with one color.

[0019]

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

FIG. 1 shows the structure of a type belt used in the type printer of the present invention. Since the type printer of the present invention differs from the above-described conventional example only in the configuration of the type belt, the configuration of the type belt will be described in detail.

As shown in the figure, the outer peripheral surface of the type belt 30 is provided with a reference position 31 which serves as a reference at the time of printing and a plurality of type blocks 32 to 34 which are a collection of individual type characters. 32-34 are
Less frequently printed than numerical symbols (numbers) such as "+", "-", "x", "÷", "=", memory symbol "M", various alphabet symbols or other special symbols. A first type block 32 consisting of the symbol 21a,
A second type block 33 composed of the numbers 21b from 0 to 9 formed in normal type, and a type having a slit or a dotted broken line although the type is almost the same as the second type block. Number 21c formed
Is composed of a third type block 34, and each type block 32 to 34 is formed in this order from the reference position 31 in the rotational direction of the type belt.

FIG. 2 shows a part of the characters formed by the broken lines, and FIG. 3 shows an example of printing using the above-mentioned character belt. As shown in the drawing, the characters are formed by normal characters. Printing of lines using the numbers 21b of the second block (printed lines in solid lines) and printing of lines using the numbers 21c of the third type block, which is a type formed by broken lines (printing lines in broken lines) It can be seen that with and, clearly different printing patterns can be obtained.

Therefore, it can be seen that by using the typeface formed by the broken line in the printing portion such as "-", the same result as in the case of printing using the conventional two-color ink can be obtained.

[0024]

As described above, according to the present invention, a desired print character is selected from a large number of print characters of an endless print belt having a plurality of print characters formed on the outer peripheral portion thereof, and the selected print character is hammered. In a print type printer for printing, the print characters formed on the print belt have a first print block consisting of symbols, a second print block consisting of numbers formed of normal prints, and a broken line. Since it is composed of a third type block composed of, it is possible to print with only one color without complicating the mechanism.
You can obtain almost the same effect as when you print using colors.
It has an excellent effect.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for explaining a configuration of a type belt of a type printer of the present invention.

FIG. 2 is an explanatory diagram showing an example of a print character formed by a broken line on the print belt of the present invention.

FIG. 3 is an explanatory diagram showing an example of a printing result using the printing belt of the present invention.

FIG. 4 is an explanatory diagram illustrating a configuration of a general type printer.

FIG. 5 is an explanatory diagram for explaining a configuration of a type belt of a conventional type printer.

[Explanation of symbols]

 19 type position detector 30 type belt 32 first type block 33 second type block 34 third type block

Claims (1)

[Claims] 1. A type printer in which a desired type is selected from the plurality of characters of an endless type belt having a plurality of characters formed on an outer peripheral portion and the selected character is printed by a hammer, The type formed on the type belt is composed of a first type block made of symbols, a second type block made of ordinary numbers, and a third type block made of numbers formed by broken lines. A type printer that is characterized.