JPS5845349B2 - Dot matrix printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a dot printing system which has a head equipped with a plurality of dot pins, and performs predetermined printing by moving the head or printing paper and selectively driving the plurality of head pins.
- This is related to a 1,1 matrix printing device, and was made specifically for the purpose of simplifying its drive circuit. The head pins of each group are driven by a common drive circuit, and depending on the rotation angle,
A hollow drum having a notch portion for allowing only the head pins belonging to one group of the head pins disposed inside the drum to face the printing paper, and a rotation driving means for the drum are provided. By controlling the rotation angle of the drum by a rotational driving means, the printing operation by the plurality of hard disk bins is performed in a time-sharing manner for each group, and a roller for pressing the printing paper toward the drum is configured. The object of the present invention is to provide a dot matrix printing device which achieves the above object by having a structure in which the paper is fed by the rotation of the drum during the pressing by the roller.

Hereinafter, the present invention will be described in detail based on Examples.

In the embodiment to be described, a head is provided with head pins for all digits corresponding to the dots in the first stage of a dot matrix consisting of seven stages, and the head is used to cover all digits of the first stage of the dot matrix. A paper feeding means is provided for feeding the paper so that the head corresponds to the second stage of the dot matrix upon completion of printing of the first stage, and the paper feeding means moves the paper to the second stage and the third stage. The present invention is implemented in a dot matrix printing device in which the printing operation is sequentially performed up to the final stage, and one line of printing is performed when the final stage prints. The printing apparatus is divided into two groups, and printing by the above-mentioned Herado pin is performed for each group in a time-sharing manner.

FIG. 1 shows the configuration of the head of this embodiment, which includes a drum 2 connected to a motor 1 and rotatable, a fixture 3 installed in the drum 2, and a head pin 4 attached to the fixture 3. It consists of

FIG. 2 shows a 35-dot matrix consisting of 7 dots vertically and 5 dots horizontally, and one character is printed using this 35-dot matrix.

Then, the vertical direction of this 35-dot IJ box is A-level.
It is set to G stage.

Heradopin 4 in Figure 1 above is A of the 35 dot matrix.
The pin corresponding to the row is n digits, for example 8 for an 8-digit display.
I'll be prepared to a certain extent.

The drum 2 has a length corresponding to an order of magnitude, and has seven windows formed on its circumferential surface corresponding to stages A to G of the dot matrix.

The window is designed to divide the configuration of the head for n digits into multiple parts, that is, in the figure, 8 digits are divided into two, and the window corresponding to the A stage of the dot matrix is divided into 1 to 4 digits. There are two types: window A and window A' for 5 to 8 digits, and window B and window A' for stages B to G of the dot matrix.
C and C, D and σ, E and wide, F and yl, G and G are formed.

The windows A, R, and B-G are arranged so that their positions are shifted from each other in the relationship of .about.σ.

Figure 3 shows the pin 4 and the windows A-G and A'- of the drum 2.
(This is an explanatory diagram showing the relationship between
- Since the holes are for 1 to 4 digits of the A stage of the IJ box, in this state, it is possible to print by the herad pin 4 for 1 to 4 digits of the A stage.

Then, in order to print the 5th to 8th digits of the A column of the dot matrix, the drum 2 is rotated in the F1 direction and the head pin 4 held in a fixed position is placed in a corresponding position with the window R of the drum 2. It is possible to print five to eight digits through the window R, thereby printing all the digits of the A column of the dot matrix.

In addition, the printing operation of the B stage of the dot matrix is performed by feeding the paper,
In addition, by rotating the drum 2 in the F1 direction, the pin 4 and the window B of the drum 2 are made to correspond with each other, so that it is possible to print 1 to 4 digits on this B stage, and 5 to 8 digits can be printed on the drum 2. By rotating the drum in the F1 direction, the head pin 4 and the window of the drum 2 are made to correspond with each other, thereby enabling printing.

Then, use the same method as above to sequentially create the dot matrix C.
Enables printing operations from stage to G stage.

FIG. 4 shows the structure of the paper feeding means, in which the printing paper 5 is transferred to the drum 2.
and rollers 6, and one of the rollers 6 is connected to an operating rod 8 which is operated by a solenoid coil 7.

When the solenoid coil 7 is energized, the operating rod 8 moves against the return spring 9 to press the roller 6 toward the drum 2, and when the solenoid coil 7 is turned off, the return spring 9 moves it to a position where it is separated from the drum 2. It moves and is always in this separated position.

The paper is fed by the drum 2 and the roller 6.
This is done by rotating the drum 2 in the direction F1 in FIG. 3 while holding the drum 2 between the two.

Figure 5 shows the head drive circuit, W is a print buffer register, and the first to fourth digits are connected to decoders CG1 to CG4, respectively, and dots are connected to these decoders CG1 to CG4. In order to switch the printing of the A to G stages of the matrix, the signals are inputted from a heptadary counter C via a decoder DC, respectively.

Therefore, the information from the first digit to the fourth digit is decoded by the matrix of the corresponding decoders CG1 to CG, respectively.

The respective outputs from the decoders CG1 to CG4 are sent to the drivers D1 to D4, and the respective outputs from the decoders CG1 to CG4 are sent to the drivers D1 to D4.
D4 has print timing signals TP1 and TP5 for the 1st to 4th digits.
The print timing signal TP2 for the 8th to 8th digits is the gate G1.
They are each introduced from the driver Dr via the .

In the drivers D1 to D4, this Dl drives the 1st and 5th digit heads (IL(5), and D2 drives the 2nd and 5th digit heads (IL(5)).
The head of the digit and the 6th digit (2:], (6), D3 is 3
The D4 is connected to drive the heads (2) and (7) of the 4th and 8th digits, respectively.

FIG. 6 shows a time chart of each signal.

is the print command signal, TP is the print timing signal for the 1st to 4th digits, TP2 is the print timing signal for the 5th to 8th digits, MD is the drum drive signal, and PD is the solenoid coil activation for paper feeding. The signal CP is a shift pulse for the buffer register W.

In the signals TPl and Te3, A-G is the time for operating stages A to G of the dot matrix.

The printing operation of the above configuration will be explained according to the time chart of FIG. 6. Print command signal P.

The contents of the first to fourth digits of the printing buffer register W are decoded by the decoders CG1 to CG, and the drivers D1 to D
4 is driven, heads [1] to [4] are operated, and the head pin 4 prints from the window A of the drum 2 on the A stage in the dot mark I-IJ of the 1st to 4th digits.

Thereafter, the drum 2 is driven in the F1 direction by the drum drive signal MD, and the head pin 4 and the window X of the drum 2 are made to face each other, and the shift pulse C is sent to the printing buffer register W.
P is applied, and the contents of the fifth to eighth digits are transferred to the first to fourth digits of the buffer register W.

Then, by applying the print timing signal TP2 for the 5th to 8th digits, the 1st to 4th digits of this print buffer register W are
Decoders CG1 to CG4 decode the data from the digit, drive drivers D1 to D4, and operate heads [5] to [8].

As a result, the A column in the dot matrix of the 5th to 8th digits from the window X of the drum 2 is printed.

Next, upon completion of the printing operation of stage A, the drum drive signal MD, solenoid coil actuation signal PD, and shift pulse CP are applied.

The drum drive signal MD rotates the drum 2 to a position where the window B faces the dowel pin 4, and the solenoid coil 7 is energized by the solenoid coil activation signal PD, thereby pressing the roller stone toward the drum 2.

As the drum 2 rotates, the printing paper 5 held between the drum 2 and the roller 6 is sent in the direction F4 in FIG. 4.

Then, by the shift pulse CP, the entire contents of the B stage of the dot matrix are stored in the printing buffer register W.
The contents of the first to fourth digits of the print buffer register W are driven by the drivers D1 to D4 via the decoders CG1 to CG4 by the print timing signal TP1 of the first to fourth digits, and the dot matrix is output from the window B of the drum 2. The 1st to 4th digits in stage B are printed.

Then, the 5th to 8th digits in the B stage are printed from the window of the drum 2 by the Te3, MD, and CP signals.

Furthermore, by the above operation, the dot matrix C stage ~
The printing operation for one line is completed by printing up to the G stage.

Incidentally, the printing using the helad pin 4 having the above structure may be of a discharge type or a heat-sensitive type.

Furthermore, although the window of the drum 2 is configured to be divided into two parts, the configuration is not limited to this, and the window can be freely selected from three to n divisions.

As described in detail above, according to the present invention, it is possible to obtain an extremely useful dot matrix printing device whose driving circuit can be simplified.

In particular, the dot matrix character writing device of the present invention skillfully utilizes a drum and its rotational drive means that must be provided for paper feeding, uses the drum as a hollow drum, disposes the head therein, and The drum is characterized by a configuration in which a predetermined notch is provided and group selection is performed by rotation of the drum by the rotational drive means, and by adopting such a configuration, the circuit for group selection can be made extremely simple. This has the effect that any configuration may be sufficient.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of the head portion according to the present invention, FIG. 2 is a configuration diagram showing a dot matrix, FIG. 3 is an explanatory diagram showing the configuration of the head in FIG. 1 in more detail, and FIG. 4 is a diagram of the present invention. FIG. 5 is a configuration diagram showing a paper feeding mechanism according to the present invention, FIG. 5 is a head drive circuit according to the present invention, and FIG. 6 is a time chart of various signals according to the present invention. 2: Drum, 4: Heradopine, A, A'~G, σ:
Drum window, 6: Roller, 7: Solenoid coil, 8:
Operating rod, W: Printing buffer register, CG, ~CG4
: Decoder, C: Counter, D1 to D4: Driver.

Claims (1)

[Scope of Claims] 1. A dot matrix printing device that has a head equipped with a plurality of spacing pins, and performs predetermined printing by moving the head or printing paper and selectively driving the plurality of head pins. The plurality of head pins are divided into a plurality of groups, and the head pins corresponding to each group are driven by a common drive circuit, and the head pins are arranged inside the head pins according to their rotation angles. a hollow drum having a cutout portion for allowing only the head pins belonging to one group to face the printing paper among the plurality of head pins to be tilted, and a rotation driving means for the drum; By controlling the rotation angle of the drum above,
The printing operation by the plurality of spacing pins is performed in a time-division manner for each group, and a roller is provided for pressing the printing paper toward the drum, and the roller presses the printing paper toward the drum when the roller presses the printing paper. A dot matrix printing device characterized in that the paper is fed by rotation of the dot matrix.