JPH0761727B2 - Printer - Google Patents

Description

The present invention relates to a printer, and more particularly to a word erasing device having an erasing mechanism for sequentially erasing a word consisting of a set of characters printed by a word erasing command signal from the end. This is related to various printing positions.

(Prior art) When a sentence such as an English typewriter is printed on a printing paper by a printing device such as an English typewriter, the spelling of words is often mistakenly printed. , Need to reprint again.

Therefore, in recent electronic typewriters and the like, the control device is provided with a current position memory for storing the current position of the head and a print data memory for storing the data input from the keyboard and printed. In many cases, there is provided an erasing mechanism for sequentially erasing a word composed of a set of characters printed by using the data from the current position memory and the print data memory in response to the operation of, by the correction ribbon.

An example of a printing apparatus having this type of erasing mechanism is the one disclosed in
No. 60-210482, in response to the operation of the erase command key,
It is described that each word consisting of one to a plurality of continuous printing characters and having both ends separated by a space is automatically deleted from the last character.

(Problems to be Solved by the Invention) In the printing apparatus having the erasing mechanism described in the above publication, when one or more continuous spaces are provided at the end of a word, any one of the spaces is provided. When the erase command key is operated with the print head in the position, the print head moves to the upper side one after another and automatically erases from the last character to the first character of the word in order.

In the control of the character deletion, the data stored in the input data memory is used, and when the word deletion command is issued, it is detected and controlled whether or not there is a character or space at the current position of the print head.

Further, in the printing apparatus described in the above publication, if the erase command key is erroneously operated when the print head corresponds to any of a plurality of spaces following the printed word,
There is a problem that words on the upper side of the space are automatically deleted.

(Means for Solving Problems) As shown in the functional block diagram of FIG. 1, a printing apparatus according to the present invention includes a printing mechanism for printing characters or symbols corresponding to input data on a printing paper. A print data memory for storing the printed data in association with the print position, a current position memory for storing the current position of the print head of the print mechanism in association with the print position, and the print data printed on the print sheet. Characters and symbols can be printed based on the data in the print data memory and the current position memory when an erasing mechanism that can erase characters and symbols in cooperation with the printing mechanism and a word erasing command signal are input. A word erasable printing device including word erasing control means for controlling the erasing mechanism so as to erase a word corresponding to the print head of the mechanism or a word on the lowermost side above the print head. When the word erase command signal is received, it is determined whether or not there is character data at the first print position corresponding to the print head based on the data in the print data memory and the current position memory. When there is no character data, the judging means judges whether or not there is character data at the second printing position adjacent to the upper side of the first printing position, and the judging means judges that there is no character data at the second printing position. In some cases, the word erasing stop control means for outputting to the printing mechanism a control signal for moving the print head to a second printing position adjacent to the upper side without outputting the word erasing command to the erasing mechanism, It is provided in the control means.

(Operation) In the printing apparatus according to the present invention, the printing mechanism prints characters corresponding to the code data input from the keyboard and the like on the printing paper, and the erasing mechanism prints the printed characters and symbols with the erasing ribbon. It can be erased in cooperation with the printing mechanism.

The current position of the print head is stored in the current position memory in association with the print position, the data printed on the print paper is stored in the print data memory in association with the print position, and the word erase control means erases the word. When the command signal is input, based on the data in the print data memory and current position memory,
The erasing mechanism is controlled to erase one word corresponding to the printhead of the printing mechanism or one word on the lowermost side above the printhead.

The word erasing control means is provided with a discriminating means and a word erasing stop control means, and when the word erasing command signal is received, the discriminating means causes the print head to print based on the data in the print data memory and the current position memory. It is determined whether or not there is character data at the corresponding first print position, and when there is no character data, it is determined whether or not there is character data at the second print position adjacent to the upper side of the first print position, When the determination unit determines that there is no character data at the second printing position, the word deletion control unit outputs the word deletion command to the deletion mechanism and moves the print head to the second printing position adjacent to the upper side. The control signal to move is output to the printing mechanism.

That is, when the word erase command signal is input, the print head is in the position of the second and subsequent spaces of the continuous space, or in the position where neither the lower side of the space at the end of the word is input. In this case, the print head moves to the second print position that is one level higher than the first print position. In this way, each time the word erase command signal is input, the print head is sequentially moved from the first print position to the second print position which is one level higher. Then, when the word erase command signal is input when the print head reaches the position of the leading space,
Since the word erasing stop control means does not operate, the print head moves to the position of the last character of the word, and the word erasing control means and the erasing mechanism sequentially erase from the last character of the word.

(Effect of the Invention) According to the printing apparatus of the present invention, as described above,
Since the discriminating means detects the presence / absence of character data at the first print position and the second print position, the backspace is achieved even when no character or space is input at the first print position corresponding to the print head. The word can be erased by inputting the word erase command signal without operating the key.

When the determining means determines that there is no character data in either the first printing position or the second printing position, the word erasing command is not output to the erasing mechanism and the print head is adjacent to the upper side. Since word erasure stop control means for outputting a control signal for moving to the print position to the printing mechanism is provided, when the print head corresponds to a space other than the head space of the plurality of continuous spaces, the word erasure command signal is issued. Even if the user inputs, the print head only moves to the position of the space one level higher (the second print position), and therefore the words are less likely to be erased by mistake.

(Example) Hereinafter, the Example of this invention is described based on drawing.

In this embodiment, the present invention is applied to an electronic typewriter 1, and by operating an erase command key 23 provided on a keyboard 3 of the typewriter 1, a word composed of a set of characters erroneously printed (hereinafter, Correction word Ribbon 20)
It is designed to be erased by an erasing mechanism provided with.

The front of the body frame 2 of the typewriter 1 has a first
As shown in the figure, a keyboard 3 is arranged, and a printing mechanism PM is arranged in the main body frame 2 behind the keyboard 3.

The keyboard 3 is provided with the following various keys. That is, a letter key including an alphabet key 4 for inputting each character of the alphabet, a numeric key 5 for inputting numbers 0 to 9 and a symbol key 6 for inputting a hyphen, a space key 7, a back key. Space key 8, carriage return key 9, shift key 1
0, code key 11, left margin set key 12, right margin set key 13, tab set key 14, tab clear key 1
5, tab key 16, paper feed key 1 to feed printing paper 17
8, a paper return key 19 for returning the print paper 17, a repeat key 20, and a cursor movement key for moving the cursor indicating the data input position on the display 21 described later.
22 and an erase command key 23 for outputting a word erase command signal.

Each function obtained by operating the above-mentioned various function keys is the same as that of the existing typewriter, and the description thereof will be omitted.

At the rear of the keyboard 3, a display 21 is provided for displaying characters and symbols input by operating the character keys 4, 5, 6 and the space key 7.

The platen 24 is arranged in the left-right direction of the main body frame 2, and is automatically or manually rotated by a platen drive motor 25 or a platen knob 26 (not shown) so that the printing paper
Paper feed 17

Further, the carriage 27 has a platen shaft as shown in FIG.
The wire 32 is supported by two guide rods 29 and 30 provided in parallel with 28 and is reciprocated in the left-right direction along the platen 24 by a wire 32 driven by a carriage drive motor 31.

The carriage 27 is provided with a type wheel drive motor 34 for driving a type wheel 33, and the motor shaft thereof has a third shaft.
As shown in the figure, the type wheel 33 housed in the wheel cassette 35 is detachably mounted and driven to rotate, and the type 36 at the tip of the selected spoke of the type wheel 33 is set in the print position facing the print hammer 37. To be done. The print hammer 37 is mounted on the top of the carriage 27, and its print hammer solenoid 38 is driven by a drive current from a print hammer driver 39 described later so as to strike the print sheet 17 with the characters set at the print position. ing.

A ribbon cassette 41 for supplying the print ribbon 40 is placed on a holder 42, the front end of the holder 42 is rotatably attached to the carriage 27, and the print ribbon 40 is supplied from the supply spool of the ribbon cassette 41. The take-up spool is driven by a ribbon feed motor 43. Further, a correction ribbon 44 is provided on the rear portion of the holder 42, which is formed to be one step lower. That is, a supply spool for supplying the correction ribbon 44 is provided on the right side of the ribbon cassette 41, and a take-up spool for winding the correction ribbon 44 is provided on the left side of the ribbon cassette 41.

Further, the print position in which the print ribbon 40 is positioned between the print type character 36 and the platen 24 (see FIG. 3).
A retracted position (not shown) in which the print ribbon 40 is moved below the print position, and a correction position in which the correction ribbon 44 is positioned between the print position type 36 and the platen 24.
(See the drawing), a cam mechanism (not shown) that is interlocked with a drive shaft (not shown) that is rotationally driven by a ribbon lift motor 45 and swings the holder 42 to the three positions is provided on the carriage 27. Is attached to.

Also, the carriage 27 and the holder 42 have the holder 42
There is provided a correction ribbon winding mechanism (not shown) for winding the correction ribbon 44 from the supply spool to the take-up spool when the correction ribbon 44 is swung to the correction position.

Therefore, the printing mechanism PM includes the platen 24 and the platen drive device, the carriage 27 and the carriage drive device, the type wheel 33 and the type wheel drive device, the print ribbon 40 and the ribbon feed drive device, the print ribbon 40, and the correction ribbon 44.
Is composed of a cam mechanism for oscillating the printing position to the printing position and its driving device, a printing hammer 37, a printing hammer driving device, etc., and each driving device of the printing mechanism is connected to the CPU (central processing unit) 46 of the control device. .

Next, the overall configuration of the control system of the typewriter 1 will be described with reference to the block diagram of FIG.

The drive unit for the printing mechanism PM is a platen drive motor.
25 and its driver 47, carriage drive motor 31 and its driver 48, ribbon feed motor 43 and its driver 49, ribbon lift motor 45 and its driver 50,
The print wheel drive motor 34 and its driver 51, the print hammer solenoid 38 and its driver 39, and the like are included.

The display device D is composed of a display 21 composed of a liquid crystal display and a display controller 52. The display controller 52 stores display data for displaying characters on the display 21 in association with code data of each character or symbol. The display data corresponding to the code data input to the display controller 52 is output to the display 21.

The control device C comprises a CPU 46, a ROM (read only memory) 53 and a RAM (random access memory) 54 connected to the CPU 46, and the CPU 46 includes the keyboard 3 and the driving device. Each driver 39, 47 ~ 51
And the display controller 52 are connected.

In the ROM 53, in correspondence with the code data of each character or the like input from the character keys 4, 5, 6 and the space key 7 of the keyboard 3 or the code data read from the print data memory 110 described later, Each motor 25
The motors 25, 31, 34, 43 corresponding to the control programs for controlling the display hammer solenoid 38 and the display 21, the code data of the respective functions input from the various function keys of the keyboard 3 A program memory 100 in which a control program for controlling 45 and the print hammer solenoid 38, a control program for character erasing control described later, and the like are stored.

In the RAM 54, a print data memory 110 for sequentially storing the printed data in correspondence with the print position, a current position memory 112 for storing the current position of the carriage 27 corresponding to the print position, and a type wheel 33. A type position memory 114 for storing the current rotation angle position of S, that is, the spoke number of the type 36 at the print position, and various memories for temporarily storing the result of arithmetic processing by the CPU 46 are provided.

The CPU 46 is an alphabet, number input from the character keys 4, 5, 6 and the space key 7 of the keyboard 3,
Based on the code data corresponding to each character and symbol such as space, symbol and other symbols, it is printed on the printing paper by the printing mechanism, and the printed data is made to correspond to the printing position.
The print data memory 110 of the RAM 54 is sequentially stored, and the carriage drive motor 31 and the type wheel drive motor are also stored.
The current position data that changes each time 34 is driven is stored in the current position memory 112 and the print position memory 114 of the RAM 54.

Then, the CPU 46 processes the code data input from the various function keys of the keyboard 3 by the control program read from the program memory 100 of the ROM 53 to generate a control signal corresponding to the input code data in each driver 39 of the printing mechanism PM. Output to 47 to 51 and display controller 52.

Further, the CPU 46 controls the code data input from the character keys 4, 5 and 6 and the space key 7 of the keyboard 3 or the character and symbol code data read from the print data memory 110 from the program memory 100 of the ROM 53. Process by program. As a result, a control signal corresponding to the code data is output to the drivers 39, 47 to 51 of the printing mechanism PM and the display controller 52 to control the printing mechanism PM and the display device D.

That is, when controlling the printing mechanism PM based on the code data, a control signal is output from the CPU 46 to the type wheel drive motor driver 51, and the type wheel drive motor driver 51 is output.
A drive current is output from the type wheel drive motor 34. Then, the type wheel drive motor 34 is rotated by a predetermined angle, and the type 36 at the spoke tip of the type wheel 33 corresponding to the code data is set at the print position in front of the print hammer 37, and at the same time, the CPU 46 drives the ribbon lift motor driver. A control signal is output to 50, a drive current is output from the lift lift motor driver 50 to the ribbon lift motor 45, and the rotation of the ribbon lift motor 45 causes the holder 42 and the print ribbon 40 to move through the drive shaft and the cam mechanism, as shown in FIG. Is rockingly driven to the print position.

Next, when a control signal is output from the CPU 46 to the print hammer solenoid driver 39, the print hammer solenoid driver
A drive current is output from the printing hammer solenoid 38 to the printing hammer 37, and the printing hammer 37 strikes the characters on the printing wheel 33.
Characters and symbols are printed on the printing paper 17.

If there is no next key input within the specified time, CP
A control signal is output from the U46 to the ribbon lift motor driver 50, the ribbon lift motor 45 is rotated, and the holder 42 and the print ribbon 40 are returned to the retracted position. Further, control signals are output from the CPU 46 to the carriage drive motor driver 48 and the ribbon feed motor driver 49, respectively.

On the other hand, a drive current is output from the carriage drive motor driver 48 to the carriage drive motor 31, the carriage drive motor 31 rotates by a predetermined amount, and the carriage 27 is moved in the print direction by one character via the carriage drive wire 32. On the other hand, a drive current is output from the ribbon feed motor driver 49 to the ribbon feed motor 43, the ribbon feed motor 43 rotates a predetermined amount, and the print ribbon 40 is fed.

When the carriage return key 9 is operated, the CPU4
The control signal 6 is output to the carriage drive motor driver 48 and the platen drive motor driver 47 by processing the code data from the keyboard 3 with the control program read from the program memory 100 of the ROM 53. Then, a drive current is output from the carriage drive motor driver 48 to the carriage drive motor 31, the carriage drive motor 31 rotates in the reverse direction, and the carriage 27 is returned to the print start position. At the same time, a drive current is output from the platen drive motor driver 47 to the platen drive motor 25, the platen drive motor 25 rotates by a predetermined amount, and the printing paper 17 is fed by one line.

Furthermore, when operating the erase command key 23 of the keyboard 3 to erase characters, the CPU 46 reads the control program for character erase from the program memory 100 of the ROM 53 and outputs a control signal to the ribbon lift motor driver 50. Is rotated to swing the holder 42 to the correction position shown in FIG. And CPU46 is the print data memory of RAM54.
The last data of 110 is read, a control signal is output to the type wheel drive motor driver 51, the type wheel 33 is rotated by the type wheel drive motor 34, and the type 36 which is the same as the character or symbol to be erased is positioned at the print position. Then, the print hammer solenoid 38 is driven by the drive current from the print hammer driver 39, the print hammer 37 is hit, and the print character is erased.

By the way, the printing apparatus of the present application, when erasing an erroneously printed word, when the print head is located in a space other than the leading space of a plurality of spaces following the erroneously printed word, or continues to the erroneously printed word Characterized by moving the print head to the position of the space on the upper side one side based on the word erase command signal when the print head is located at the position on the lower side of the space where no character or space has been input yet Is to have.

First, an outline of word erase control will be described to facilitate understanding of the description based on the flowchart.

FIG. 6 shows, as an example, a word printed with an incorrect spelling of “THE EXANPLE” and the data in the print data memory 110 in association with each other.

In the figure, spaces (indicated by symbol S in the figure) are entered in the first digit, the fifth digit, the thirteenth digit and the fourteenth digit, respectively.

In this character erasing control, when the erasing command key 23 is operated, if the print head is at any position of the sixth digit to the twelfth digit or the space of the thirteenth digit, the print head moves to the twelfth digit. Move to the position of the last character of and delete from the last character to the first character in order. If there is a space above the print position corresponding to the print head when the erase command key 23 is operated (for example, when the print head is at the 14th digit position), one print head is used. It moves to the position of the space of (the position of the 13th digit) and stops there.

When the erase command key 23 is operated, even if the print head is in the 15th digit position (H ₁ position) that has not been input, the print head is moved to the position of the upper digit space (the 1st digit). It moves to the 14 digit H ₀ position) and stops there.

Therefore, as in the latter case, when the print head is at the print position of the 15th digit, if the erase command key 23 is operated only twice, the print head will stop at the position of the 13th digit. Reconfirm the word "EXANPLE" and then delete command key 2
When 3 is re-operated, the characters from the last character to the first character will be erased in order.

That is, the print head is sequentially moved to the upper side, and in each of the moving devices, "ELPNAXE" is sent via the correction ribbon 44.
In the order of, type the words "EXANPL
Erase "E" in order from the last character. As a result, after erasing, it is possible to reprint with correct spelling from the first character position of the word.

If you continue to press the erase command key 23 when the print head is at the 14th or 15th digit print position, the self-repeat function of the erase command key 23 causes the print head to move to the position of the leading space. Subsequently, the last character to the first character will be erased.

Next, a flowchart of the character erasing control performed by the control device C of the electronic typewriter 1 will be described with reference to FIG.

When the erase command key 23 is operated and an erase signal is output from the keyboard 3 to the CPU 46, in step S1 (hereinafter, simply referred to as S1. Other steps are treated similarly),
Based on the data in the current position memory 112 and the data in the print data memory 110, it is determined whether or not there is a character at the current position corresponding to the current print head (whether or not it is printed). If there is a character, the process proceeds to S2, and if there is no character, the process proceeds to S8.

In S2, it is determined whether or not there is a character at the print position one level lower than the current position of the print head (print direction). If there is a character, the process proceeds to S3, and if there is no character, the process proceeds to S5.

In S3, the carriage 27 is moved to the next lower print position, and the process returns from S3 to S2. That is, in the case of a word consisting of a plurality of characters, by repeating S2 and S3, when the carriage 27 is sequentially moved to the lower print position and reaches the print position of the last character of the word, S2 When it is determined that there is no print character in, the process proceeds from S2 to S5.

In S5, the print character is erased by printing the same character via the correction ribbon 44 on the print character at the print position corresponding to the current print head. Next, in S6, the data in the print data memory 110 corresponding to the print character erased in S5 is erased.

Next, in S7, it is determined whether or not there is a character at the print position one level higher than the current position of the print head (the direction opposite to the print direction), and if there is a character, the process proceeds to S4. Further, in S4, the carriage 27 is moved to the next higher print position, the process proceeds from S4 to S5, S5 and subsequent steps are repeated, and the first print character of the word is erased in sequence.

Then, when the carriage 27 reaches the print position of the first character of the word and is erased up to the first character of the word, it is determined in S7 that there is no character at the print position one higher than that, and the erase control ends. .

Further, in S8, it is determined whether or not there is a character at the print position that is one level higher, and if there is a character, the process proceeds to S4.

That is, if there is no character at the current position and there is a character at the upper printing position, for example, if the carriage 27 is at the position of the 13th digit in FIG. 7, S4 and subsequent steps are executed to start the word. Up to characters are erased in sequence and at the same time the print data memory 110 corresponding to the erased print characters
The data is deleted in sequence and the control ends.

On the other hand, if the determination result in S8 is NO, that is, if there is no character in the print position one higher side, the process proceeds to S9, and it is determined whether the print position one higher than the current position of the print head is a space. It

If the result of the determination in S9 is NO, that is, if there is no character at the current position and there is no character or space at the upper printing position, the process moves to S11 and an alarm is displayed on the buzzer and alarm lamp. Then, the process ends (for example, when the print head is at the first digit print position in FIG. 6).

When the determination result in S9 is YES, that is, when the printing position on the upper side is the space, the process proceeds to S10, and the carriage 27
The print head is moved to the next higher print position via, and the control ends.

That is, in S10, for example, in FIG.
This is a step for moving the print head to the position of the space on the upper side one side via the carriage 27 when the print position is at the 4th digit or the 15th digit.

As described above, in the typewriter according to the above-described embodiment, the erase command key 23 is pressed in a state in which the print head is positioned at any print character of the word to be erased or the position of the leading space following this word. It is possible to automatically delete the erroneously printed word by operating it.

Also, when the erase command key 23 is operated, if there is no character at the print position corresponding to the print head and there is a space on the upper side, the print head moves to the position of the space on the upper side and stops. , When a plurality of spaces are continuous, the erase command key 23 can be continuously operated to move the print head sequentially to the upper space position by its self-repeat function, and then the word can be automatically erased. If necessary, the print head may be stopped at the position of the leading space to confirm the word to be erased and then the erase command key 23 may be operated to erase the word.

Further, for example, even when the print head is located at a position in the 15th digit of FIG. 6 where no input has been made, the backspace can be operated by operating the delete command key 23 without operating the backspace key 8. Then, the word erase can be executed.

[Brief description of drawings]

FIG. 1 is a functional block diagram of the printer of the present invention, and FIGS.
FIG. 7 shows an embodiment of the present invention. FIG. 2 is a perspective view of an electronic typewriter, FIG. 3 is a side view of a vertical section showing an essential part of the electronic typewriter, and FIG. 3 corresponding to FIG. 3 when erasing a printing character with the correction ribbon, FIG. 5 is a block diagram of the control system of the typewriter, and FIG. 6 is a printed word, a printing position, and data in the print data memory. FIG. 7 is a flow chart of the word erasure control. C: control device, 3 ... keyboard, 23 ... erase command key, 46 ... CPU, 24 ... platen, 27 ... carriage, 3
2 …… Wire, 40 …… Print ribbon, 33 …… Type wheel, 37 …… Print hammer, 38 …… Print hammer solenoid,
39 …… Print hammer solenoid driver, 44 …… correction ribbon, 53 …… ROM, 54 …… RAM, 34 …… Type wheel drive motor, 51 …… Type wheel drive motor driver, 45 ……
Ribbon lift motor, 50 …… Ribbon lift motor driver, 31 …… Carriage drive motor, 48 …… Carriage drive motor driver, 43 …… Ribbon feed motor, 49 …… Ribbon feed motor driver, 25 …… Platen drive motor,
47: Platen drive motor driver, 112: Current position memory, 110: Print data memory.

Claims (1)

[Claims] 1. A printing mechanism for printing characters or symbols corresponding to input data on a printing paper, a print data memory for storing the printed data in correspondence with a printing position, and printing by the printing mechanism. A current position memory that stores the current position of the head in association with the printing position, and an erasing mechanism that can erase characters and symbols printed on the printing paper through an erasing ribbon in cooperation with the printing mechanism. , When a word erase command signal is input, based on the data in the print data memory and current position memory, one word corresponding to the print head of the printing mechanism or one word on the lowermost side above the print head A word erasing control means for controlling an erasing mechanism so as to erase the word erasing device, the printing data memory and the current position when the word erasing command signal is received. Based on the memory data, it is determined whether there is character data at the first print position corresponding to the print head, and when there is no character data, the second print position adjacent to the upper side of the first print position. Discriminating means for discriminating whether or not there is character data, and when the discriminating means discriminates that there is no character data in the second printing position, the word erasing command is not outputted to the erasing mechanism and the print head And a word erasure stop control means for outputting a control signal for moving to a second printing position adjacent to the side to the printing mechanism, the word erasure control means being provided in the word erasure control means.