JPS5948172A - Electronic typewriter with automatic correcting function - Google Patents

Abstract

PURPOSE:To stop or move a printing section by an one-touch key operation to letter positions corresponding to most preceding letter code holding memory by operating EXP key by using a system in which the number of characters for plural lines when the carriage is returned is stored. CONSTITUTION:The address of the tip position of a compilation buffer 40 is stored in a pointer AP1, the address of the end position of the first line is stored in a point AP2, and the address of the end position of the second line is stored in a point AP3. The address of the present input position is stored in a point AP4 and the address corresponding to the carriage position at the time of back spacing during the correction period is stored in a pointer AP5. When EXP key is operated when the carriage is in a position corresponding to automatic correction area, the action flow of the Fig. is practised. When AP5=AP1, the action is ended, at which the carriage is positioned at the tip of the automatic correction area.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention is used in an electronic typewriter that prints based on electronic control by operating character keys. In particular, this type of typewriter is an electronic typewriter that is equipped with an automatic correction function that includes a backup memory (temporary storage device) for the input text so that if the typist types incorrectly, the error can be corrected by simply pressing the correct key again. This is related to.

<Prior Art> An electronic typewriter has been proposed in Japanese Patent Publication No. 8388/1983. An i (type tie writer) equipped with an automatic correction function has also been proposed in Japanese Patent Application Laid-Open No. 49-44808.

This automatic correction function and 6. Memorize the number of input characters for about one line in the backup memory, and operate the erase key on the corrected recorded character position within the memorized range of one line to correct the error. Erroneous printing can be erased by selecting the printed characters and stamping them again via the erasing ribbon.
Subsequently, when the correct character is pressed manually, the correct character is printed at that position and the correct character is also input into the corresponding position in the buffer memory, thereby performing a series of operations.

However, in the conventional automatic correction function, as described above,
It memorizes the number of characters equivalent to a line, and can only make automatic corrections within this range, placing limitations on this correction function. In other words,
Currently, automatic correction cannot be performed beyond the range of one line, and this automatic correction function is not fully utilized.

<Objective of the Present Invention> The present invention is intended to provide an electronic typewriter which is not expanded to include the above-mentioned automatic correction function, and which is excellent in operability for the operator. In particular, the printing section is equipped with a function that allows the printing section to automatically stop moving to the character position corresponding to the most preceding character code held in the memory by a one-touch key operation.

One Embodiment Figure 1 shows the appearance of an electronic typewriter of the present invention.
The keyboard 1 includes a keyboard 1 and a printing section 2, and the keyboard 1 includes a group 11 of alphabet keys and a space bar (hereinafter referred to as character keys), and a group 10 of various control keys.

The printing section 2 may be of a type generally known as a DZ wheel printer (equipped with a petal-shaped electronic wheel), and for example, 022, which has a mechanism known from Japanese Patent Publication No. 56-8388 mentioned above, is a Furiten printer. The platen 2
Reference numeral 2 serves to move the recording paper in the vertical direction using a knob 23 or a paper feeding mechanism.

A carriage 21 includes a live wheel, an ink ribbon, and an erasing ribbon, and is moved forward or backward by a stepping mechanism.

This erasing ribbon is placed on the printing surface in place of the ink ribbon under correction control, and at this time, by printing desired characters (erroneously recorded characters), the erroneously recorded characters are erased. 17 is a display device.

Next, the correction function operation will be explained. Characters input using the character keys 11 of the keyboard are printed on recording paper with an ink ribbon, and the character information is stored in an internal storage device (editing buffer).

This editing buffer has a storage capacity of, for example, 200 characters, and when input beyond this capacity, the oldest character information is taken out from the sofa and deleted by 7 characters.

When correcting characters that have already been printed, character information corresponding to the character at the position placed by the carriage is read out and printed via the erasing ribbon. By doing this, the ink adhering to the recording paper is removed by printing the butter in the same shape as each turn of the print via the erasing ribbon. Also, white paint or the like may be applied. In this way, the correction function is automatically performed.

However, this correction function cannot be achieved unless character information is stored in the buffer.

In other words, this is a case where a character that was previously inputted was erased after seven notes from the buffer is corrected.

In this case, manual correction is performed by manually inputting the corresponding characters. This is because if the capacity of the buffer is increased, there will be no problem with the troublesome operation of manual correction, but it is mechanically impossible to increase the capacity of this buffer infinitely.

One reason for this is that the horizontal movement of the carriage is swept by a wire driven by a motor, which allows for highly accurate position control, but for the vertical direction, that is, controlling paper feed by rotating the platen, a coupling mechanism such as a gear is used. In addition, slight errors in the amount of movement may occur due to slipping between the platen and the paper, etc., and if the paper is fed many times, the errors will accumulate and cause a misalignment between the printed position on the paper and the erased print during correction. This is because errors occur and cannot be corrected.

Another problem is that even if this error could be overcome, it would be expensive.

Therefore, in this example, the above-mentioned movement amount error does not occur and the functionality of automatic correction can be maximized. Specifically, this automatic correction is performed within a range of 200 characters or 3 lines. This is what made it possible.

Next, the control key group 10 will be explained.

-Key 12 is a backspace key, and each time this key is operated, the carriage is moved back one character.

EXP key (EXPRESS) 13 is a key for moving the carriage to the position of the first character stored in the buffer.

The REL key (RELOCATE) 14 is the 0MC key (MA key) that moves the carriage to the current input position.
NUAL C0RRECTION) 15 has modes to set the manual correction mode among the above correction functions.

A CORRECTION key 16 is a correction key, and printed characters are erased by operating this key.

FIG. 2 is a block diagram of the present device, and this diagram will be explained.

30 is the aforementioned keyboard device, which supplies key signals from this device to the encoding circuit 31. This encoding circuit 3
1 generates a coded signal (character code, control code) corresponding to the key. These code signals are supplied to an editing control circuit 32'.

The editing control circuit 32 is connected to a RAM 34 via a data bus.
, a ROM 36, a print control unit 33, a display, and a notification control section 39 having a notification sound generation circuit.

The ROM 36 stores an editing control program 42, a step-it-table 43 that stores the amount of advance of the carriage corresponding to each character, and a paper feed table 44 that determines the amount of rotation of the platen. This editing control program 42 is
Control programs as shown in FIGS. 7 to 7 are stored.

The ROM 34 includes an edit buffer 40 and address pointers A P + to APs (
41) and each state flag F l + F2 + F3+
F4 and counter K are provided.

The pointer AP+ stores the address of the beginning position of the editing buffer 40, the pointer AP2 stores the address of the end of the first line, the pointer AP3 stores the end of the second line, and the pointers A and P4 are the current address. The address of the input position is stored, and the pointer A P 5 stores the address corresponding to the carriage position during backspace during cutting.

Reference numeral 38 designates the printing section 2 of FIG. 1 in block form. These are generally known mechanisms.

The printing unit 38 includes a character selection mechanism 50 for rotating and arranging desired characters in a printing position on a character wheel connected to a motor or the like, and a type selection mechanism 50 for rotating and arranging a desired character at a printing position by a solenoid or the like to strike the wheel and ink. A mechanism 51 for impacting the platen via the ribbon or erasing ribbon, and an ink ribbon mechanism 52 for placing the ink ribbon at the printing position in synchronization with the printing (this mechanism 52 is activated when the 0 key 16 is operated). , this operation is prohibited); an erasing ribbon mechanism 53 that is selected when the above (] key 16 is operated and positions the erasing ribbon at the printing position in synchronization with printing; and an erasing ribbon mechanism 53 for moving the carriage along the platen according to characters A mechanism 54 that moves a predetermined amount of movement (step amount) in the forward or backward direction (moves within the left and right margins), and a mechanism 54 that moves the recording paper up (forward) or down (backward). Therefore, at least a mechanism 55 for rotating the platen and a sensor mechanism 56 for detecting the position of the carriage are provided.

On the other hand, FIG. 8 shows an example of the character information stored in the editing buffer 40, and FIG. 9 shows the printing state.

Next, the operation of the above device will be explained by function.

(I> Five-first rule) (Refer to the flowchart in FIG. 3.) At this initial stage, the address pointer API~APs indicates the starting position of the editing buffer 40 (7).
The case of inputting the characters shown in FIG. 8 will be explained as an example.

When the zuzu character key is operated (in this example "S"), the address value of Ar4 will be changed to the address circuit (if it is not the new line key).
ADRA) 35, and the character code is stored at the beginning of the editing buffer 40.

Furthermore, a type selection mechanism 50 of the printing section. Hammer mechanism 51
．． The ink ribbon mechanism 52 is driven to print. (Steps 100 to 104 in the flow of FIG. 3) When the printing is finished, the step amount corresponding to the "-" character ("S'l" is read out from the step amount table 43 in the ROM 36,
The carriage advancing mechanism 54 is driven to move the carriage forward (stesoge 105). Next, press A P 4 +
1 and transfers this content to AP 5. At this time, the carriage phantom is located at the next printing position. Therefore, Ar
4°APsi',jg is the address value indicating the position 92 in FIG. In the history, it is determined whether Ar4 is a b) response corresponding to n (200 characters) (step 107,
108). In this way, each time a character key is input, it is sequentially stored in the buffer 40 and printed.

If you enter characters in this way and input characters sequentially up to position 93 in Figure 8, and press the new line key here, the flow will proceed from step 101 to step 110, and as in the previous explanation, A P
The address value of 4 (AI) R/ is transferred to the circuit 35, and the line feed code is stored in the buffer 40. Furthermore ROM360
Paper feed) i: Drive the platen mechanism 55 according to the table 44 to move the recording paper one line in the forward direction (stege 112).

Since the flap F1 is now in the initial state and has been reset, the process proceeds to step 114 and the counter K is incremented by -11 (K,=1). Furthermore, it is determined whether =3, that is, whether the number of lines exceeds three lines (steps 114 and 115).
.

Furthermore, the address value of AP3 is transferred to Ar1 (stesogame 116). In this case, the values of Ar3 and A P2 are both in the initial state, that is, at position 91 in Fig. 8,
It doesn't actually change.

Subsequently, Ar4 is transferred to AP3. Therefore, A P
3 is the end of the first line (Fig. 9 A), that is, 9 in Fig. 8.
The address value of 4 is stored (stesoge 117).

Furthermore, let's increase A P 4 by '-1, and this A
Transfer the value of r4 to A P (stesoge 118.1
19). Therefore, Ar4 and Ar5 indicate the position 95 in FIG. 8.

By repeating the above operations, Ar4 or 9 in Fig.
9, A P 3 is at the end of line 13 (97 in Figure 8).
), AP 2 is the end of the Δ line (94 in Figure 8), AP+
91 in FIG. 8, respectively.

Now, if the number of characters input reaches n (200 characters), the process proceeds from step 108 to step 120, and the buffer 4
Move 0 one character left/full (step 120)
. Therefore, the first character of buffer 40 (91 in FIG. 8)
The character ゛s〃 is extruded and erased.

AP2 to AP5 are then reduced by one character. AP3 is 96 in Figure 8, 3 from AP2t,
AP, , AP5 will indicate 98.

Also, in Fig. 8, the input on the 3rd line is not completed, but the input on the 8th line is not completed.
When the line feed key is operated following the input character 114 JT in the figure, =3 is detected in step 115 marked with "1", and the process proceeds to step 130.

When the process proceeds to step 130, the flag Fl is set, and steps 131 and subsequent steps are performed to erase the first line (line A) from the buffer 40. As explained earlier, if a large number of lines are stored in the line direction, a line misalignment will occur when the line is returned for correction. This is because it exceeds.

The operations after step 131 will be explained as follows: A P 2
is increased by one character. Then, AP2 indicates the beginning 95 of line B. Furthermore, from the position indicated by AP2, A
Transfer character information to the position indicated by P I . Therefore, it is stored in the character 11XII 91 in FIG. Then, it is determined whether AP2” is AP3, and then AP+
, increase AP2 by +1. This operation is AP2=AP
:Repeat until it becomes +. Therefore, 95 to 970 in FIG.
The characters will be stored in order starting from position 91.

Furthermore, it is operated after step 140, and is distributed like '1,
2, 3.4 ・” characters are transferred to the position following XYZ・”″ (steps 140 to 144).
When P 3 = A P 4, steps 145-14
7 is operated, thereby AP+ is placed at the 91 position in FIG. 8, AP2 is placed at the end of line B, AP3 is placed at the end of line C,
AP4. AP5 indicates the starting position of the D row, respectively. Repeating this operation is dead; yo'<2d) 4 buffers for each new line
The first line with 1 and a written in 0 is erased. Thereafter, the process advances from step 113 to step 131.

To summarize, when 200 characters are exceeded, the first character information (FIG. 8, 91) is erased every time a character is input, and when three lines are exceeded, the first line is deleted. Therefore, the input character information in buffer 40 never exceeds 200 characters and never exceeds one or three lines. In addition, these 200 characters correspond to approximately 3 lines (A4 size) when characters with the smallest amount of increments are continuously inputted.
(Refer to the flowchart in FIG. 4) When correcting characters, operate this spacer to move the carriage to the desired position.

In the flow shown in Fig. 4, when the backspace key is operated, since F2 is reset (it is reset if the MC key is not operated), power is applied to the storage Y 202, and A P s ” ” A P + are compared.

Now, suppose that APS, AP4 shows Figure 8 99, that is, a carriage or 6 lines of characters 114 JT
is located at the next character position (next print position). Therefore, the process moves to step 203.

In this step 203, AP5 is subtracted by one character and f''LSAPs indicates the position 98 in FIG.
It is judged whether the conditions Ps""AP3, AP5=APz are satisfied. Here, the process moves to step 206, so that the address value of A P 5 is A D R,
, is supplied to circuit 35, and the corresponding character "4" is read out.

Further, the step amount corresponding to the character ``Jin'' is read from the step amount table 43 in the ROM 36 and supplied to the carriage step mechanism 54 of the printing section. The carriage is moved backward by this step amount. Accordingly, the carriage is placed at the character position of line C "4" (steps 203-208).

Every time the backspace key is operated with this on,
The above operation is repeated.

If this backspace key is operated when the carriage is positioned at the beginning of line C, AP5 is set to 1 in step 203.
character (shown at position 97 in Figure 8),
At this time, the condition AP5-AI)3 is satisfied, and the process moves to step 220.

In this case, the amount of rotation of the grating is read from the paper feed amount table 44 in the ROM 36, and is supplied to the platen mechanism 55, where the platen is rotated in the opposite direction by a distance corresponding to one line (
(backward of the recording paper), indicating the beginning of the carriage il''iB line.

Further, the address value (position 95 in FIG. 8) incremented by Kl characters (position 95 in FIG. 8) of AP2 (shown at position 94 in FIG. 8) is transferred to APsK, and the operations described below are further repeated.

That is, the address value of A()5 is supplied to the ADRAl path 35, the corresponding character is read out from the editing buffer 40, the step 1.1 is read out from the step amount table 43 to the east, and applied to the carriage step mechanism 54. ~225).

Next, add one character to AP5, AP5-(
Repeat the above operation until AP3 1) is reached. Therefore, when the carriage reaches the position of the end character 11 Z I+ of line B (FIG. 8, 96), it stops.

Also, the condition A P s ” A P 3 of Stesono 222 is for stopping at the beginning of line B when line B contains only a line feed code. Also, if the carriage is located at the beginning of line B If the bank space key is operated while the computer is running, AP5 = AP2, and steps 230 to 237 are executed in the same manner as the above operation.

With the above operation, 1 is created by operating the backspace key.
If the line is exceeded, the carriage is moved to the end of the previous line, and as a result, the character is moved in the opposite direction of input.

Also, the carriage is at the beginning of the editing buffer 40 (FIG. 8, 91).
), if you operate the backspace key, the character position will be a character position that is not stored in this buffer, that is, automatic correction will not be possible. The sound generating circuit is activated and generates a buzzer sound for a predetermined period of time to notify the operator of this condition.

In addition, when correcting old printed characters (characters erased from the buffer) beyond this position, it is necessary to manually correct them by operating the MC key 15.

(IID automatic correction operation (refer to the flow chart of No. 5 (S) and B)) When the correction key 16 (hereinafter referred to as the correction key) is operated, the erasing ribbon mechanism 53 of the printing section is selected. (stesoge 401).

Now, suppose that the carriage is located at the B row it Z JJ position on the first roll (Fig. 8, 96), APs = AP
+, so the process moves to step 404. For example, A
If Ps';AP, the notification control circuit 39 is activated as described above.

In step 404, one character is subtracted from A P s and this address value is sent to ADR, circuit 3.
5 and buffer 40.1: the corresponding character code (
Read out (u y n characters in Figure 8) (Stesoge 402~
406).

If this is not a line feed code, the step amount is read from the step amount table 43 in the ROM 36, and the carriage is moved backward. Further, a type selection mechanism 50° . . . marking mechanism 51 . The erasing ribbon mechanism 53 prints the corresponding character ('Y'') via the erasing ribbon.

Therefore, the corresponding characters are removed from the recording paper (steps 408-409). Furthermore, buffer 400 characters +t
y rr is deleted, leaving the position blank (step 410). Also, the erasing ribbon mechanism 53 is released.

At this time, the carriage is at the erasing character position, and if a correct character is entered here (not shown), this character will be printed and the character will be memorized in the sofa and the carriage will move forward by the corresponding step amount. Ru.

Each time the correction key 2 is operated, the operation 1 is executed.

When the line feed code is read out, the process moves from step 407 to 412, where F3 is set and the process moves to step 202 in FIG. 4, where the same operation as the previous backspace operation is performed. That is, the carriage moves to the end of the previous line, and then the process moves to step 239.

The id' and F3 are reset in the stem generator 239, A P s is supplied to the ADRA circuit 35, the corresponding character code is read from the buffer, and if it is not a line feed code, the process returns to step 409 in FIG. 5(O). Similar to the previous operation, the corresponding characters are printed and erased via the erasing ribbon.

Also, when the line feed code is read out by the stems 241 and 242 in FIG. 4, step 41 in FIG.
1 and the erase ribbon is released. One! , the character whose line feed code is read is not erased, but only the erase ribbon is released.

(IV) Manual correction operation (see the flowchart in Figure 5 (a)) As explained earlier, when the carriage moves to the beginning of the automatic correction area, a notification sound is generated and the operator must make subsequent manual corrections. When this is confirmed, the MC key 15 is operated.

When you operate this MC key (step 3 in Figure 5 (a)
00), F2 is set, the notification control circuit 39 is driven, and the "MANUAL C0RR" on the display 17 in FIG.
The character position "ECTION" is lit (steps 301, 302).

In this state, the operator will move the carriage to the desired position by operating the bank space key again.

When this backspace key is operated, since F2 is currently set, the process moves from step 201 to step 210 in FIG. 4, and is moved back by one character. The step amount at this time is a fixed standard step l (preferably the smallest step amount).

Furthermore, once the home position (left margin) is notified by the sensor mechanism 56, the carriage will not move backward any further. Therefore, the paper feed is not reversed either.

If the operator wishes to return it further, he must manually return it using the platen knob 23.

When the carriage is thus positioned at a desired position and the correction key is operated, the erase ribbon is selected (step 400 in FIG. 5(b)).

Since F2 is currently set, the process moves to step 420. When the operator looks at the characters printed on the recording paper and inputs the corresponding characters, the characters are printed and erased via the erasing ribbon. At this time, the carriage does not move forward.

Function + 1) Automatic correction i "Moving gear lithography to the beginning of the area"
When the EXP key 13 is operated when the character is in a position corresponding to the automatic correction area (the area where buffer characters are stored), the operation flow shown in FIG. 6 is executed.

Then, F2 is reset iL and A P , -AP
The following operation is repeated until they match.

It first subtracts A P s by one character and supplies that value to ADRA circuit 35 to read the corresponding character code. The step amount corresponding to the character code is read from the step amount table 43 in the ROM 36, and the carriage is moved backward.

When the line feed code is read out, F4 is set and the process moves to step 204 in FIG. 4 during the previous backspace key operation, the carriage is moved to the end of the previous line, and F4 is reset again using the stems 243 and 244. Then, the process returns to FIG. 6 and the above operations are repeated.

When APs=API, the operation ends, and at this time the carriage is positioned at the beginning of the automatic correction area.

This allows the operator to confirm whether or not the character he or she wishes to correct is in the automatic correction area by sequentially moving the carriage backward.

Father, the carriage can also be moved manually.
Furthermore, after switching from automatic correction mode to manual correction mode and moving the carriage to a position outside the automatic correction area, manually position the carriage to the beginning of the automatic correction area, and press the EXP key to confirm that the current position is in the area. If you input an instruction indicating that it is the first position of the file, you can return to the automatic correction mode after that.

(2) Movement to the input position of the automatic correction area When the carriage is located in the automatic correction area and the carriage is automatically positioned to the input position of the area, RE L
When the OC key 14 is operated, the operation flow shown in FIG.

The following operation is repeated until AP5=AP4.

First, AP is supplied to the ADRA circuit 35 to read the corresponding character, and the step amount corresponding to this character is read from the table 43 and the carriage is moved forward by this step amount. , if it is a newline code, it will be a newline.

By repeating this operation, the gear ridge is automatically placed at the next input position (FIG. 8, 99).

Also, at this position, after changing from automatic correction to manual correction (positioning the carriage outside the automatic correction area), it is possible to switch back from manual correction to automatic correction. In this case, the user operates the RELOC key 14 to manually indicate that the carriage is at the input position. This RE
LOC key 14 (or EXP key above) is operated
．． Then, F2 is reset and the display 17, which had been performing manual display, is turned off, indicating that the automatic correction mode 1 is in effect.

<Effects of the Invention> As detailed above, in the present invention, in an electronic typewriter equipped with an automatic correction function, a plurality of lines (m lines) that does not cause a movement amount error when reversing paper feed is provided. The memory is configured to store the number of characters (n characters), and every time a character code is input beyond the n characters, the characters are sequentially erased from the previously input character code 1. If there is an input line beyond , the preceding line is erased in the III' quaternary manner for each input.
In addition, when the printing section is moved back to the character position corresponding to the leading character code held in the memory, by operating the key (EXP key) that instructs this, the printing section is moved in the reverse order of input to the memory. It is possible to move backward sequentially and automatically stop at the character position, and the movement of the printing section during correction can be easily controlled with a one-touch operation, greatly increasing the functionality of the automatic correction function, making it easier to operate. This small electronic typewriter with excellent performance can be provided.

[Brief explanation of drawings]

Figure 1 does not show the external structure of the electronic typewriter of the present invention.
Figure 2 is a block diagram showing the circuit configuration of the device, Figures 3 to 7 are flowcharts showing the operation flow of the device, and Figure 8 is a diagram showing the configuration of the inlet cover. FIG. 9 is a diagram showing an example of recording the input characters in FIG. 8. 1: Keyboard, 2: Print section, 17: Display,
21: Character, 22 Nibraten, 30: Keyboard device, 33: Print control unit, 34: R
AM, 36: ROM, 38: Print section, 39:
Notification control circuit, 40: Edit buffer, 41: Pointer, F1 to F4: Flag, K: Counter.

Claims (1)

[Scope of Claims] l. A printing section that prints characters on paper by sequentially moving in the horizontal (line) direction in response to character information input from the keyboard, and representing the character information input from the keyboard; a memory for sequentially storing character codes for a predetermined number of characters in the input order; and means for backspaceing the printing section with respect to the paper; A predetermined character is written from the paper by backspacing the copy, reading out the corresponding character code in the memory in the reverse order of the storing, selecting the character of the read character code, and stamping it through an erasing ribbon. In an electronic typewriter equipped with an automatic front 11-function consisting of an erasing means, the number of characters (n keys) over multiple lines (m lines)
1. a memory configured to have a capacity to store 1; a means for detecting the number of line feed instruction codes in the information stored in the memory; In addition, if a line instruction code is included, if there are input lines beyond the m lines based on the detection means, the input line is sequentially erased from the previous input line for each manual line. a control means for the memory for erasing; an instruction key for instructing movement of the printed section to a character position corresponding to the most preceding character code held in the memory; and printing in response to the operation of the instruction key. the above-mentioned backspace means for sequentially backspacing the bank space character by character; and the position of the printing part in response to the bank space operation.
a synchronization control means for performing synchronization control with the data position in the memory; and a state for detecting, based on the synchronization control, a state in which the printing section has arrived at a print character position corresponding to the most preceding character code held in the memory. What is claimed is: 1. An electronic tie writer having an automatic correction function, comprising: a detection means; and a means for stopping movement of a printing section in response to detection by the detection means.