JPS6331777A - Printer - Google Patents

Abstract

PURPOSE:To contrive the conservation of memory capacity, by controlling the position of a printing head in terms of the column number of a printing position based on an absolute origin in the current pitch mode. CONSTITUTION:A pitch mode memory stores a pitch mode designated through a pitch mode key. A column number counter stores the current position of a printing head in terms of the column number of a printing position counted on the basis of an absolute origin in the current pitch mode. On receiving a mode switching signal from the pitch mode key, a converting means obtains one of printing positions capable of being reached by the printing head in the pitch mode after the switching which is the nearest to the current position of the head before the switching, in terms of the number of columns from an absolute origin in the pitch mode after the switching. On receiving an output from the converting means, a corrective movement controlling means for converting the content of the column number counter into a column number after the switching calculates a corrective movement quantity for moving the head from the current position before the switching to the printing position corresponding to the column number obtained by the converting means, and outputs to a printing mechanism a control signal for moving the head by the corrective movement quantity.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a printing device, and more particularly to a printing device that is capable of changing the printing pitch (pitch, elite, micron, etc.) in the middle of a printing line. .

(Prior Art) In printing devices used in electronic typewriters, word processors, personal computers, etc., one of a plurality of printing pitches (intervals between printed characters) is generally selected and specified. .

For example, in the case of electronic typewriters, the printing pinch for printed characters is generally Paikabinochi (10 characters per inch).
and elite pinch (12 characters per inch), and depending on the model, it is also possible to select micron pitch (15 characters per inch).

The printing pitch is closely related to the position control of the print head, the current position memory that stores the current position of the print head, or the tab position memory that sets the left and right margins and tab positions. The following two methods were used to do this.

The first method is Pi force pitch: Elite pitch = 6:5
Since the pi force pinch is 2 micron pinochons = 6:4, we use a value with the unit of 1/6 of the pi force pitch, or 1/60 inch (this is called a common pinch), and calculate the common pinch with the absolute origin as a reference. The printing position is expressed by the number of .

The second method uses a value for each printing pitch with the printing pitch as a unit, and expresses the printing position by the number of each printing pitch (this is called the number of digits) with the absolute origin as a reference.

(Problem to be solved by the invention) When printing a table etc. using a typewriter, or when erasing an incorrectly printed word and reprinting a word with a larger number of characters, etc. Summary 1 is that you want to change the printing pitch.

By the way, in the case of the first method, since the printing position is controlled at a pitch common to pi force, elite, and micron,
It is possible to change the printing pitch in the middle of a printing line.

However, for example, in the case of a device where one printing line is 8 inches, the printing position is O to 480 [however, 480 = 8 ÷ (1/60)]
Since it is expressed as a number in the range of , the problem is that 2 bytes of memory are required for each of the current position memory and about 20 tab position memories, making the required memory capacity extremely large. be.

On the other hand, in the case of the second method, since the print position is controlled by the number of digits for each print pitch, 1 byte of memory can be used as the current position memory and multiple tab position memories, but the print position is controlled by the number of digits for each print pitch. Since the movable position of the print head is different between the two (the number of digits of each print pinch is independent and not correlated with each other), it is not possible to change the print pitch in the middle of one print line, and it is not possible to change the print pitch in the middle of one print line. There is a problem in that the printing pitch cannot be changed unless the printing gutter is once returned to the absolute origin at the left end.

(Object of the Invention) An object of the present invention is to provide a printing device that can change the printing pitch in the middle of a printing line and can save memory capacity.

(Means for Solving the Problems) As shown in the functional block diagram of FIG. and a printing mechanism that prints characters, symbols, etc. corresponding to data input from the keyboard on printing paper, a pitch that stores the pitch mode specified by the pitch mode key. Equipped with mode memory,
A digit counter is provided for storing the current position of the print head of the printing mechanism by the number of digits of the print position counted based on the absolute origin in the current pitch mode, and when a mode switching signal is received from the pitch mode key. , Among the printing positions where the print head can move in the pitch mode after switching, find the nearest position corresponding to the current position of the print head before switching as the number of digits from the absolute origin in the pitch mode after switching, and calculate the number of digits from the absolute origin in the pitch mode after switching. Conversion means for converting the contents of the number counter into the number of digits after switching is provided, and upon receiving the output from the conversion means, the print head is moved from the current position before switching to the print position of the number of digits determined by the conversion means. A corrective movement control means is provided for calculating a corrected movement amount to move the print head to and outputting a control signal to the printing mechanism to move the print head by the corrected movement amount.

(Operation) Since the printing device according to the present invention is configured as described above,
The pitch mode specified by the pitch mode key is stored in the pitch mode memory, and the current position of the print head is stored by the digit counter as the number of digits of the print position counted based on the absolute origin in the current pitch mode. .

Then, when a mode switching signal is output from the pitch mode key to the converting means, the converting means uses the pitch mode memory and the digit counter to move the print position to printing in the bi/notch mode after switching. Among them, the nearest position corresponding to the current position of the print head before switching is found as the number of digits from the absolute origin in the pitch mode after switching, and the content of the digit number counter is converted to the content after switching.

The correction movement control means receives the output from the conversion means and calculates a correction movement amount for moving the print head from the current position before switching to a printing position of the number of digits determined by the conversion means, A control signal for moving the print head by the corrected movement amount is output to the printing mechanism, thereby causing the print head to move by the corrected movement amount.

(Effects of the Invention) According to the printing device according to the present invention, as explained above,
The position of the print head is controlled by the number of digits of the print position counted by the digit counter with the absolute origin as a reference in the current pitch mode, so the number of digits is 2.
Since data with a large number of digits such as 56 or more can be stored in 1 byte of memory, it is possible to configure about 20 or more tab position memories with 1 byte of memory each. Memory capacity can be significantly reduced.

Moreover, when the pitch is changed, the conversion means and the correction movement control means calculate the number of digits of the pitch mode after the change corresponding to the current position of the print head before the change, and change the contents of the Di number counter to the number of digits after the change. At the same time, the correction movement amount is calculated and the print head is moved by the correction movement amount, making it possible to change the printing pitch as necessary in the middle of a printing line, thereby increasing the functionality of the printing device. , it becomes efficient and easy to use, and the product value increases.

(Example) Hereinafter, an example in which the present invention is applied to an electronic typewriter will be described with reference to the drawings.

As shown in FIG. 2, a platen 2 is supported on the rear side of the main body case 1 of the typewriter, and a guide loft 4 extending parallel to the platen 2 is disposed in front of the platen 2. As shown in FIG. A carriage 3 is supported by the guide rod 4 so as to be movable left and right along the platen 2. Said carriage 3
A thermal head 5 is attached to the platen 2 so that the thermal head 5 can be switched between a printing position where it is pressed against the printing paper P on the front side of the platen 2 and a non-printing position where it is separated from the printing paper P forward. It has become.

A power switch 7 is provided on the side surface of the main body case l. In addition, a keyboard 1″1 is provided at the front of the main body case 1.
0 is provided, and the keyboard 10 is provided with 1, which is shorter than one line.
A 5-digit liquid crystal display (LCD) 11 is provided.

Furthermore, the following operating members such as various keys and changeover switches for operating the typewriter are arranged on the keyboard 10. Namely, character symbol keys including the alphabet $-12 for inputting each letter of the alphabet, numeric keys 13 and space key 14 for inputting numbers 0 to 9, backspace key 15, carry, and jiridan key 16. , shift key 17, second shift key 18, left margin set key 19, right margin set key 20, tab set key 21, tab clear 1-
-22, tab key 23, paper feed key 24 for feeding the printing paper P, return key 25 for returning the printing paper P, repeat key 26, code key 27, first and second mode selection switches 28 and 29, Insert key 3°O, delete key 31, cursor movement keys 78 and 79 for moving the cursor 33 indicating the data manual position on the display 11, pie force pitch key 69 for changing the printing pitch of printed characters by pica pitch. , Elite Bi, Chikey 70, etc., which are also used for elite pinch feeding.

Among these keys and switches, the code key 27 is used for other keys, namely auto carriage return mode,
Numerical keys 34 to 34 correspond to various printing functions such as light margin flash mode, centering mode, line high line mode, and underline mode.
39, etc., to select each printing function by generating code data different from the code data generated when those keys are operated alone.

The first mode selection switch 28 is a two-position sliding switch for selecting one of two modes: typewriter mode and terminal mode.

The second mode selection switch 29 is a non-print mode,
This is a three-position slide 2 switch for selecting one of three modes: collection print mode and direct print mode.

Note that the other keys are provided in a normal typewriter, so their explanation will be omitted.

Furthermore, regarding the carriage feeding mechanism for reciprocating the carriage 3 having the thermal head 5 from side to side and the ribbon feeding mechanism incorporated in the carriage 3, Japanese Patent Laid-Open No. 60-87
Since the configuration is similar to that shown in Publication No. 085, a detailed explanation thereof will be omitted, and the configuration of the iron will be briefly described.

When the thermal head 5 moves in the printing direction during printing, the take-up spool rotates and the thermal transfer ribbon is wound onto the take-up spool, but when the thermal head 5 is moved in the opposite direction to print, the thermal head 5 is By retreating to the non-printing position, the take-up spool is prevented from rotating.

Next, the control device for the electronic typewriter will be explained with reference to the block diagram shown in FIG.

The CPU (central processing unit) 60 includes a printing mechanism 61,
a display mechanism 62; an external interface driver/receiver 77 connected to the external interface 63;
Keyboard 10 and ROM (read only memory)
64 and RAM (Random Access Memory) 65
are connected as shown.

The printing mechanism 61 includes a paper feed motor 66 and a paper feed motor driver 72 that drive the paper feed roller, a carriage feed motor 67 and a carriage feed motor driver 73 that move the carriage 3, and the thermal head 5 at a printing position. It is provided with a switching solenoid 68 and a solenoid driver 74 that selectively switch between the non-printing position and a non-printing position, a thermal gutter 5, a thermal head driver 75, and the like.

The display mechanism 62 includes the display (liquid crystal display) 11 and a display controller 76.

The ROM 64 also includes a pattern memory 100 that stores pattern data such as each character and symbol, a control program that controls the printing mechanism 61 and the display mechanism 62, and a control program that controls the printing pitch of printed characters (described later) from the force pitch. −
The printer is also provided with a program memory 102 that stores a control program for printing pinch switching control for switching from pitch to pitch or from elite pitch to sharp pitch.

The RAM 65 includes at least a print data memory 106 that stores code data input from the keyboard 10 in correspondence with the print position, and a print data memory 106 that stores code data input from the keyboard 10 in correspondence with print positions, and a print data memory 106 that stores code data input from the keyboard 10 in correspondence with print positions, and a print data memory 106 that stores code data input from the keyboard 10 in correspondence with print positions, and a print data memory 106 that stores code data input from the keyboard 10 in correspondence with print positions, and a print data memory 106 that stores code data input from the keyboard 10 in correspondence with print positions, and a print data memory 106 that stores code data input from the keyboard 10 in correspondence with print positions. The pitch switching flag 107 that writes 1 and the current position of the thermal head 5 are stored in the current pitch mode by the number of digits of the print position counted based on the absolute origin of the thermal head 5 (the origin at the left end where characters can be printed). a digit counter 109,
Pitch mode memory 11 that stores the current pitch mode
0 and the thermal head 5 when switching the pitch mode.
A movement amount memory 108 for storing a corrected movement amount for correcting the movement, and various time storage memories necessary for controlling the printing mechanism 61 and the display mechanism 62 are provided.

The CPU 60 sequentially stores in the print data memory 106 of the RAM 65 code data corresponding to each character and symbol such as alphabets, numbers, spaces, arithmetic symbols, and other symbols input from the character symbol keys of the keyboard, and also stores these code data in the print data memory 106 of the RAM 65. The pattern data corresponding to the code data of are sequentially read from the pattern memory 100 of the ROM 64, and
1 thermal head driver 75 and carriage feed motor driver 73.

Further, the CPU 60 processes the code data input from various function keys of the keyboard 10 using a control program read from the program memory 102 of the ROM 64 to send control signals corresponding to the input code data to the paper feed motor driver of the printing mechanism 61. 72, a carriage feed motor driver 73, a solenoid driver 74, and a display controller 76.

By the way, the present invention is characterized by printing pinch switching control that switches the printing pinch of the thermal head 5 when the pitch mode is switched in the middle of a printing line by operating the pitch switching key.First, it is important to understand the explanation of the flowchart. To make it easier to understand, an outline of this printing pitch switching control will be explained below.

The number of characters printed per inch is 10 characters for pi-force pitch and 12 characters for elite pinch, and pica-pinch: elite pitch=6=5.

Therefore, when switching from pitch pitch mode to elite pitch mode in the middle of a printing line, the thermal head 5 is moved to the elite pitch mode that is closest to the position (number of digits) of the thermal head 5 counted by the digit number counter 109. It is necessary to move (correction movement) to a position that is an integral multiple of the absolute origin in terms of pitch, and to change the contents of the digit number counter 109 to the number of digits after switching.

Also, when switching the pitch mode from elite pitch mode to pica pinoch mode, the thermal head 5 is moved to the thermal head 5 closest to the position (number of digits) of the radar 5 at that time.
Move to a position that is an integer multiple from the absolute origin in a pica pinch (
It is necessary to change the contents of the digit number counter 109 to the number of digits after switching.

Figure 5 shows the correspondence relationship between the printing position of the pie force pitch and the printing position of the elite pinch.
-0,1,2,...) and En (n=O11,2,
...) indicates the number of digits of the printing position from the absolute origin, and the arrows indicate the correspondence during the first conversion from Baica pitch to Elite pitch and the second conversion from Elite pitch to Pica pitch. It shows the correspondence relationship.

When the first conversion and the second conversion are expressed in a simple formula in correspondence with FIG. 8, the following pitch conversion table is obtained.

(Margins below this page) Pitch Conversion Table 1 (However, n=o, 1.2,...) As can be seen from Figure 5, the thermal head Since it is necessary to correct the position of the thermal head 5, find the corrected movement amount (ΔP) of the thermal head 5,
When moving the thermal head 5 next, the corrected movement amount (
ΔP).

Next, a routine for controlling printing pitch switching performed by the control device of the electronic typewriter will be explained with reference to the flowchart shown in FIG.

When the typewriter is powered on, this control is started and the process moves to step Sl (hereinafter simply denoted by 31, and other steps are handled in the same way).

In Sl, it is initialized and moves to S2.

In S2, the current pitch mode corresponding to the selected pitch key of the pitch key 69 or the elite pitch key 70 on the keyboard 10 is read.

Next, in 83, the pitch mode read in S2 is written into the pitch mode memory 110 of the RAM 65.

In S4, it is determined whether there is any key force (whether or not a key has been operated on the keyboard 10), and if there is no key force, the process is repeated until a key is operated, and if a key is operated, the process moves to 35.

In S5, it is determined whether the operated key is a pinch switching key (whether it is a pica pitch key 69 or an elite pinch key 70), and if it is a pitch switching key, S
6, and if the key is not a pitch switching key, S14 is performed for eight moves.

In S6, the pitch mode corresponding to the pitch switching key input in S5 is stored in the pitch mode memory 110.
The pitch mode can be switched by writing to .

Next, at 87, a digit counter 109 counts the current position of the thermal head 5 in digits based on the absolute origin.
The value of is read.

Next, in step 88, it is determined whether or not to convert from the pica edge mode to the elite pitch mode based on the data in the pitch mode memory 110, and when switching to the elite pitch mode, the process moves to S9 to perform pitch switching calculation processing. (
In addition, when switching to the pica-cabin edge mode, the process moves to S10 and a pitch switching calculation process (second conversion) is executed.

Here, the calculation processing routine of the first conversion will be explained with reference to the flowchart of FIG. The quotient is set to n and the remainder to 81.

For example, at the 8th digit (ps) in Figure 5,
n-1, e, = 3.

Next, in 332, el obtained in S31 is 3
It is determined whether or not the number is 3 or more, and if it is 3 or more, the process moves to 333, and if it is 2 or less, the process moves to S34.

In S33, the value of e is determined by adding 1 to e.

Next, in 534, the value obtained by adding el to n×6 is the number of digits (En) of the thermal head 5 at elite pitch.
).

In FIG. 5, the 8th digit (ps) of the Baika pitch becomes the 10th digit (E, .) of the elite pitch.

Next, in step 335, the corrected movement amount (ΔP) is determined using a calculation formula as shown.

In addition, E is the pitch constant of elite pitch (however, this is R
(stored in the ROM 64), and P is the pinch constant of the pi-force pitch (however, this is stored in the ROM 64).

Next, at 836, (P+ΔP)≧(CP +C
E)/2 is determined, and if Yes, the process moves to S11, and if No, the process moves to S37. However, C
1 is the character width of the printed character of Baika pinch, co is the character width of the printed character of Elite pinch, and CP and Ce are the ROM
64.

If (P+ΔP)≧(cr +CE ”)/2 is not true, the last printed character printed before pitch conversion will overlap with the first printed character after pitch conversion, so in S37, elite Pitch constant E
The sum of these is set as the corrected movement amount ΔP.

In other words, move the printing position one more time so that the printed characters do not overlap.
This is to move the printing position to the lower side (printing direction).

Next, in 338, the number of digits En obtained in S34 is
The value obtained by adding 1 to the elite pitch is set as the number of digits of the thermal head 5 at the elite pitch after conversion, and the process moves from 338 to Sll.

The calculation processing routine of the second conversion will be explained with reference to the flowchart of FIG. 8. The process moves from S8 to 341, and in S41, the value read in S7, that is, the number of digits (En), is divided by 6, The quotient is n and the remainder is e.
Set to 2.

For example, in the case of the 10th digit (El.) in FIG. 5, n-1 and e2=4.

Next, in S42, it is determined whether e2 obtained in S41 is 4 or more. If e2 is 4 or more, the process moves to S43, and if it is 3 or less, the process moves to S44.

In S43, the value obtained by subtracting 1 from e2 is set as the value of e2.

Next, in 344, the value obtained by adding e2 to n×5 is the number of digits (Pn
).

In FIG. 5, when the 10th digit (El.) is in the elite pinch, the 8th digit (P8) is in the pi-cabin edge.

Next, in S45, the corrected movement amount (ΔP) is calculated using a calculation formula as shown in the figure.

Next, in S46, (E+ΔP)≧(C,+CE
)/2 is determined, and if Yes, the process moves to Sll, and if No, the process moves to S47.

Similarly to the above, in order to prevent the last printed character printed before pitch conversion from overlapping with the first printed character printed after pitch conversion, in S47, the pitch constant P of the pi force is added to ΔP. is the corrected movement amount ΔP.

In other words, move the printing position one more time so that the printed characters do not overlap.
Move to the lower printing position.

Next, in 348, 1 is added to the number of digits obtained in S44.
The added value is set as the number of digits of the thermal head 5 at the pi-cabin edge after conversion to the pi-cabi edge, and the process moves from 348 to 311.

Next, in Sll, the corrected movement amount (ΔP) of the thermal head 5 calculated in S9 or 310 is RA
It is stored in the movement amount memory 108 of M65.

Next, in 312, since there was a pitch change, the RAM
65 is written in the pitch switching flag 107 to set the pinch switching flag 107.

Next, in step 313, the value of the digit counter 109 is set to 89.
Alternatively, it is converted to the value En or Pn of the number of digits after pitch mode conversion determined by Sho, and the process moves from S13 to S34.

In S14, it is determined whether the key operated in S4 is a carriage movement key such as character symbol keys 12 and 13, space key 14, backspace key 15, carriage return key 16, etc., and if it is a carriage movement key, ° Proceeds to S15, and if the key is not a carriage movement key (such as a feed key or a function key), the process proceeds to S19.
Processing corresponding to the content of the key is executed, and the process moves from S19 to S84.

In S15, it is determined whether or not the pinch switching flag 107 is set, and if the pinch switching flag 107 is set, the process moves to S16, and if it is not set, the pinch switching flag 107 is set.
Transition to 0.

In S16, the corrected movement stored in the movement amount memory 108! The thermal head 5 is corrected and moved according to (ΔP).

That is, by moving the thermal head 5 in S16, the position of the thermal head 5 becomes a position that is an integral multiple of the pitch after pitch switching (picture edge or elite pitch) from the absolute origin.

In this case, in the CPU 60, the movement amount memory 1
Based on the data stored in 08, a control signal is output to the carriage feed motor dry huff 3 of the M-shaped mechanism 61.

Next, in 517, since the pitch switching process was executed in 816, O is written in the pitch switching flag 107 and the pitch switching flag 107 is reset.

Next, in step 318, the printing process and the thermal head 5
, or the movement of the thermal head 5 is executed.

For print processing, keyboard 1 is used for CPtJ60.
Based on the data in the pattern memory 100 corresponding to the code data input from 0, the thermal head drying huff 5 of the printing mechanism 61 and the carriage feed motor driver 73
A control signal will be output to and.

Further, in the case of movement of the thermal head 5, a control signal is output from the CPU 60 to the carriage feed motor driver 73 according to input code data.

As described above, the current position of the thermal head 5 is stored in the current pitch mode by the number of digits of the printing position counted with reference to the absolute origin, and when switching the pitch mode, the printing position in the pitch mode after switching is stored. The movable and nearest printing position is calculated as the number of digits from the absolute origin in the pitch mode after switching, and the contents of the digit number counter 109 are converted to the number of digits after switching. Then, the correction movement amount to move the thermal head 5 to the print position after switching is calculated, and the correction movement of the thermal head 5 is not executed when the pitch switching operation is performed, but when the next carriage movement key is input. The carriage movement based on the command is executed prior to and substantially simultaneously with the movement of the carriage.

However, the correction movement of the thermal head 5 may be executed immediately after switching the pitch mode.

Next, as a modification of the above embodiment, a case will be described in which this pitch mode switching control is applied to an electronic typewriter having a pica-sochi mode, an elite pitch mode, and a micron pitch mode.

-The number of characters printed per inch is 10 at pica pitch.
There are 12 characters in elite pinch and 15 characters in micron pitch, and the printing pitch ratio is picapisochi2micronpinch=3:2, elite pinch2micron pitch=5=4.

FIG. 9 shows the correspondence between the printing position of Pika Isochi and the printing position of Micron Pinch, and in the figure, Pn (n
=0.1,°2,...) and Mn (n=O11,2
,...) indicates the number of digits of the printing position from the absolute origin, and the arrows indicate the correspondence during the third conversion from pi-force pitch to micro-pitch and the fourth conversion from micro-pitch to pi-force pitch. It shows the correspondence relationship when .

Figure 10 shows the correspondence between the elite pitch printing position and the micron pitch printing position.
(n=o, 1.2,...) and Mn (n=0, ■, 2
,...) indicates the number of digits of the printing position from the absolute origin, and the arrow indicates the fifth point for converting from elite pitch to micron pitch.
It shows the correspondence at the time of conversion and the correspondence at the time of the sixth conversion from micron pitch to elite pitch.

If the third conversion and fourth conversion are expressed in a simple formula corresponding to FIG. 9, the following pinch conversion table 2 is obtained.

Pitch Conversion Table 2 (However, n=Q, l, 2,...) Then, if the fifth and sixth conversions are expressed in a simple formula in correspondence with FIG. 10, the following pitch conversion table 3 is obtained. It becomes like this.

(However, n=0, 1.2, . . . ) That is, the pitch mode switching control is performed based on the micron pinch, which is the smallest pitch between printed characters.

Then, when converting from Pica Pisochi to Elite pitch, the pinch is switched by combining the third and sixth conversions, and when converting elite Pinochi pie force pitch, the pinch is switched by combining the fifth and fourth conversions. Switch the pitch and find the number of digits at the pitch after switching.

The calculation process for determining the corrected movement amount (ΔP) for correcting movement of the thermal head 5 and the pitch feed mode switching control can be performed using the same concept as the control in the previous embodiment, so a detailed explanation will be omitted.

Although the present embodiment has been explained based on an electronic typewriter equipped with a thermal head, the present invention can also be applied to a printing device equipped with a printing mechanism of the second wheel or a type ball type printing mechanism. Of course.

[Brief explanation of drawings]

Figure 1 is a functional block diagram showing the configuration of the present invention, Figures 2-
Fig. 10 shows an embodiment of the present invention, Fig. 2 is a perspective view of an electronic typewriter, Fig. 3 is a plan view of a keyboard,
Fig. 4 is a block diagram of the control system of the typewriter, Fig. 5 is an explanatory diagram showing the correspondence between the printing position of pie force pitch and the printing position of elite pitch, and Fig. 6 shows the routine of pitch mode switching control. Flow chart, FIG. 7 is a flow chart showing the routine of step S9 in FIG. 6, FIG. 8 is a flow chart showing the routine of step SIO in FIG. 6, and FIG. 9 is a flow chart showing the routine of step SIO in FIG. FIG. 10 is an explanatory diagram showing the correspondence between elite pitch printing positions and micron pitch printing positions. 2-...platen, 3...carriage, 4...
Guide loft, 5. Thermal head, lO.
・Keyboard, 60...CPU (Central Processing Unit),
6E... Printing mechanism, 64... ROM (read only memory), 65... RAM (Random access memo January, 66... Paper feed motor, 67... Carriage feed motor, 68... Switching solenoid, 69...・Pikabifchi key, 70・・Elite bifuchi key, 72・
・Paper feed motor driver, 73... Carriage feed motor driver, 74... Solenoid driver, 7
5. Thermal head driver, 100°. Pattern memory, 102...Program memory, 1
07...Pitch switching flag, 108...Movement amount memory, 109...Digit number counter, 110...Pitch mode memory. Figure 1

Claims (1)

[Claims] (1) A keyboard equipped with a pitch mode key that specifies the printing pitch of printed characters, various character keys, and function keys, and a printer that prints characters, symbols, etc. on printing paper that correspond to the data input from the keyboard. a pitch mode memory that stores the pitch mode specified by the pitch mode key; and a pitch mode memory that stores the pitch mode specified by the pitch mode key, and counts the current position of the print head of the printing mechanism with respect to the absolute origin in the current pitch mode. a digit counter that stores the number of digits of the printing device to be used; and a digit counter that stores the number of digits of the printing device to be used, and when receiving a mode switching signal from the pitch mode key, one of the printing positions to which the print head can move in the pitch mode after switching, the print head before switching. a conversion means for determining the nearest position corresponding to the current position of the pitch mode as the number of digits from the absolute origin in the pitch mode after switching, and converting the contents of the digit number counter into the number of digits after the switching; Upon receiving the output, calculates a corrected movement amount for moving the print head from the current position before switching to a printing position of the number of digits determined by the conversion means, and sends a control signal to move the print head by the corrected movement amount. A printing device characterized by comprising: correction movement control means for outputting to a printing mechanism.