JPS6342878A - Printer - Google Patents

Abstract

PURPOSE:To enhance functions of a printer, by providing a detachable memory card, and permitting the use of the memory card only when a code registered in the memory card is inputted. CONSTITUTION:At the time of reading a registered document text, an ID number is inputted through a keyboard 3, upon which a master microcomputer 121 first outputs a predetermined comparison code to a memory card 8, and then outputs the inputted ID number to the memory card 8. In this case, when the comparison code from the master microcomputer 121 is inputted, a decoder 161 in the memory card 8 outputs a chip enable signal CE, whereby data of an ID number registered at a predetermined address in a RAM 138 are read. A comparator 162 compares the ID number thus read with the ID number inputted from the master microcomputer 121, and only when the two ID numbers coincide with each other, the chip enable signal CE is outputted to enable access to the RAM 138.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a printing device that prints according to input data from an input device.

2. Description of the Related Art In general, electronic typewriters, which are printing devices that print according to input data from an input device, are equipped with a memory pack for registering type formats such as tab sets and margins.

However, being able to register only the type format in the memory pack is not functionally sufficient.

Therefore, it is conceivable to provide an external memory for registering text data, etc., but in this case, it may be desirable not to allow anyone other than the creator to use the texts registered in the external memory.

Purpose This invention has been made in view of the above points, and an object thereof is to improve the functions of a printing device.

In order to achieve the above object, this invention includes a removable memory card and allows use of this memory card only when a code registered on the memory card is input. be.

Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

FIG. 1 is an external perspective view showing an example of an electronic typewriter as a printing device embodying the present invention.

This electronic typewriter has a keyboard 3 for inputting character information, control information, etc., and a liquid crystal display (LCD) device for displaying data inputted by the keyboard 3, inside a case consisting of a lower case 1 and an upper case 2. 4
and a type wheel type printer 5 that prints input data, etc.
It is equipped with

Furthermore, a cover S that can be opened and closed for replacing the type wheel and ribbon of the printer 5 is attached to the top surface of the case 2.
A paper guide 7 equipped with a paper edge guide 7A for guiding the left end of the printing paper is mounted on the rear upper surface of the paper guide 7. A memory card 8 used as an external text memory or the like for registering texts can be attached to the back of the paper guide 7.

The keyboard 3 also has a group of A/N keys 11.

A deletion (collection) key 12 for instructing character deletion (collection), a memory key 13 for instructing registration/recall of a single sentence (text, phrase, etc.), a print key 14 for instructing to start printing, and an instruction for stopping printing, etc. a stop key 15 for performing various commands, a code key 16 for issuing various instructions in combination with other keys, a cursor forward movement (cursor back) key 17, and a cursor backward movement (cursor forward) key 1.
It is equipped with 8th class.

FIG. 2 is a perspective view showing the inside of this electronic typewriter.

The lower case 1 includes a keyboard 3 equipped with a liquid crystal display device 14, a mechanical section of a printer 5 to be described later, a control board 9 that constitutes a control section that controls the entire electronic typewriter, and a control board 9 that controls opening and closing of a cover 6. A cover automatic switch 10 consisting of a detection microswitch is installed.

Note that the control board S has a memory card 8.
A connector 9A to which the connector 8^ is attached is also attached.

FIG. 3 is a perspective view showing an example of a mechanical section of the printer 5. FIG.

This mechanism section is rotatably mounted with a platen 22 that wraps and feeds paper to be printed between frames 21 and 21 attached to both sides of the subframe 20. This platen 2
2 is an idle gear 25.2 which is meshed with a motor gear (not shown) by a line feed motor 23 consisting of a stepping motor fixed to the frame 21. It is rotationally driven via a platen gear 27 that meshes with an idle gear 26 that moves together with this idle gear 25, and automatically feeds the paper.

Further, manual operation knobs 28, 28 are attached to both ends of the platen 22, and by turning the knobs 28, paper can be loaded or removed manually. Furthermore, in front of this platen 22, a paper pail 31 fitted with a pail roller 30 is supported at both ends by pail members 32 and 32, and is urged toward the platen 22 by a pail drive mechanism (not shown) so that it can swing freely. It is located in

On the other hand, a carriage 35 is mounted on a rod 33 and a stay 34 fixed between the frames 21 and 21 so as to be movable parallel to the platen 22 in its axial direction. The carriage 35 includes a cassette type type wheel 36, a selection motor consisting of a stepping motor for rotating this type wheel 36, which will be described later, and a type wheel 3.
6, a ribbon cartridge 41 loaded with an ink ribbon 40, a ribbon feed mechanism, a collection mechanism, and the like.

In addition, as the ribbon 40 of the ribbon cartridge 41,
Both multi-strike ribbons and one-time ribbons (collector pull ribbons) can be used.
I'm using collector's ribbon here.

A space motor 4S consisting of a stepping motor is attached to a mounting plate 42 fixed to the subframe 20, and a gear 46 fixed to the rotating shaft of the space motor 45 is mounted.
A space pulley 48 having a gear 47 that meshes with the space pulley 48 is rotatably supported, while two pulleys 50 and 51 are rotatably supported on a support plate (not shown) fixed to the frame 21, 21. These space pulleys 48 and pulleys I
A space wire 53 is stretched between J50 and J51, and this space wire 53 is fixed to the front bottom surface of the carriage 35, and the space motor 45 moves the carriage 35 parallel to the platen 22.

FIG. 4 is an exploded perspective view showing details of the carriage 35.

Carrier frame 61 that constitutes the main body of carriage 35
A front frame 62, which is slidably fitted onto the rod 33, is swingably attached to the front side of the frame 62 by a pin 63, and is biased forward by a spring S4. This front frame 62 includes a selection motor 66 consisting of a stepping motor that rotates the type wheel 36, a print hammer (print hammer billet) 67 that hits the type on the type wheel 36, and a print hammer that drives the print hammer 67. Magnet 68 and print hammer 6
A selection consisting of a return spring 6 for double action 7 and a detent hammer (not shown) that detents the gear interposed between the selection motor 66 and the type wheel 36, a detent hammer magnet that drives this detent hammer, etc. -Hammer unit 70 is installed.

Furthermore, a cassette presser 71 for holding down the cassette of the type wheel 3B, and a selection home sensor 72 for detecting the home position of the type wheel 36 and the type of the type wheel 36 are attached to the front lower part of the carrier frame 61. Further, a card holder 73 is attached to the front upper part of the carrier frame 61. This card holder 73 has a paper guide surface 73a that guides paper and a tape guide section 73b that guides a correction tape (correction tape) to be described later. Furthermore, a cassette presser 74 (located on both sides, but only one is shown) for holding the ribbon cartridge 41 is attached to the rear upper surface of the carrier frame 61.

Furthermore, a ribbon feed mechanism 75 is installed inside the carrier frame 61. This ribbon feed mechanism 75 includes a mounting plate 7 attached to the carrier frame 61.
6, a gear 79 that meshes with a gear 78 fixed to the rotating shaft of the ribbon feed motor 77, a gear 80 that meshes with this gear 79, and a ribbon cartridge that meshes with this gear 80. It consists of a drive gear 81 and the like that rotates a drive shaft inside 41. A plate 84 that also serves as a lid for the ribbon feed mechanism 5 is attached to the rear upper surface of the carrier frame 61, and a ribbon identification switch 85 consisting of a microswitch for detecting the type of ribbon cartridge 41 is installed inside the plate 84. The actuating piece 85a is attached so as to protrude upward from the through hole 84a of the plate 84.

Note that the ribbon cartridge 41 has a through hole formed at a position corresponding to the ribbon identification switch 85 in the case of a multi-strike ribbon cartridge, for example, and a through hole formed in a position corresponding to the ribbon identification switch 8S in the case of a collector pull ribbon cartridge. Thereby, the ribbon type is identified by turning on/off the ribbon identification switch 85.

Further, on the side surface of the carrier frame 61, a ribbon end sensor 86, which is a reflective photosensor that enters inside the ribbon cartridge 41 and detects the end of the ribbon 40 when installed, is attached by a mounting plate 87 or the like. .

A collecticon mechanism 90 is attached to the upper middle part of the carrier frame 61. This collection mechanism 90
is the collar 9 attached to both sides of the carrier frame 61.
1, side parts 93a and 93b of a swinging plate 93 are rotatably supported, and the swinging plate 93 is rotated forward by a tension coil spring 94 interposed between it and a mounting plate 87 fixed to the carrier frame 61. It is energizing.

Both sides 9B of this swing plate 93! , 93b are integrally molded with guide levers 95 and 95, respectively, and a guide roller S6 for guiding the collection tape is attached to the tip of each of these guide levers 95. Further, the center portion of the swing plate S3 is connected via a connecting lever 98 to a plunger S7a of a collect ribbon magnet 97 fixed to the mounting plate 7S of the ribbon feed mechanism 7S.

The connection lever 98 on the collection ribbon magnet S7 side is rotatably supported by a pin, while the swing plate 93 side is fixed with a screw 100.

Furthermore, both sides 95 of this swing plate 93. .

The spool 102.1 is attached to the shaft 101 installed on the outside of the shaft 93b.
03 is fitted rotatably. A tension spring 104 is inserted inside the sending-out spool 102 to bias the spool 102 to rotate in order to apply tension to the collection tape.

On the other hand, a ratchet gear 103a is formed on the outer peripheral surface of the take-up side spool 103, and a side portion S3b of the swing plate 93 is formed.
The ratchet gear 10 of this winding side spool 103 is
A feed pawl 105 that engages with 3a is swingably mounted. Note that this feed claw 105 is attached to the side portion 9 of the swing plate S3.
A tension coil spring 106 is engaged between the spool 103 and the spool 103, and its tip is pressed toward the ratchet gear 106a of the spool 103. Further, a reverse rotation preventing pawl 107 that engages with the ratchet gear 103a of the take-up side spool 103 is swingably attached to a mounting plate 87 fixed to the carrier frame 61, and its tip is connected to the ratchet gear 103a by a spring or the like (not shown). Pressing to the side.

Then, a pulley 111 around which a collection tape 110 made of removable tape (or a top-coated tape may be wound) and a pulley 112 to which the tip of the collection tape 110 is fixed are attached to these sending-out spool 102 and take-up spool 103, respectively. It is fitted. The collection tape 110 comes out from the feed-out pulley 111, and the guide roller 96 of one guide lever 95. It is attached to the take-up pulley 112 via the card holder 73 and the guide roller 96 of the other guide lever 95.

In this collection machine [90, when not performing collection, the collection ribbon magnet 97 is in an off state (non-energized) and the collection tape 110 is located below the impact position by the print hammer 67.

At the time of collection, the collection ribbon magnet 97 is turned on by a control section to be described later, and the swing plate 93 swings upward.

The collection tape 110 is connected to the ribbon 40 and the platen 22.
, that is, at the impact position by the print hammer 67. At this time, the swinging of the swinging plate 93 causes the feed pawl 105 to feed the take-up spool 103 by an amount corresponding to the amount of swing of the swing plate 93. Therefore, the collection tape 110 is on spool 1.
The amount of rotation of pulley 112 corresponding to the amount of rotation of 03 is fed. In this case, the amount of the collection tape 110 wound around the pulley 112 by the rotation of the spool 103 is smaller than the maximum character width of the type on the type wheel 36, for example, 1/2 to 1/3 of the character width. Each component of this collection mechanism 90 is formed so as to be as follows.

After the collection tape 110 is positioned at the impact position in this manner, the printed characters of the characters to be deleted are impacted by the print hammer 67, so that the printed characters are placed on the ribbon 40 and the collection tape 1 positioned in front of the ribbon 40.
10 onto the paper on the platen 22, the characters printed on the paper are peeled off and erased by the collection tape 110.

5 and 6 are a front view and a side sectional view of the type wheel 36.

This type wheel 36 is a cassette type type wheel (cassette wheel) in which a wheel 36A is housed in a cassette case 36B made of an opaque body.
6A is the selection motor 6 on the back side, referring to Figure 7.
A plurality of spokes 36E are radially extended from a central boss portion 36D formed with two teeth 3SG that mesh with a crown gear of No. 6, and typefaces 36iF are supported at the tips of the spokes 36E.

As shown in FIG. 7, on the platen side (front side) surface of the central boss portion 3SD of this wheel 36A, there is a mark Mll made of a reflective plate serving as a home position identification mark on the same circumference, and a mark Mll indicating the wheel type. A mark MW made of a reflective plate is attached as an identification mark. In this case, mark Ml
The width in the rotation direction of the rewheel 36A is formed wider than the mark MW, and the interval between the mark Ml and the mark MW is predetermined according to the type of the wheel 36A.

On the other hand, a notch 36G is formed in the cassette case 36B corresponding to the radial position of the marks MH and MW attached to the wheel 36A, and the aforementioned selection home sensor 72 is arranged corresponding to this notch 36G. ing.

FIG. 8 is a block diagram showing the control section of this electronic typewriter.

The main controller 120 includes a mask microcomputer (hereinafter referred to as "master microcomputer") 121,
Slave microcomputer (hereinafter referred to as "slave microcomputer") 122, ROM 123, and RAM 1
24, a buffer 12S, a printer l1012G, an R10 (receive/online) board 127, and the above-mentioned memory card 8 to be installed as appropriate.
The master microcomputer 121 is in charge of overall control such as text creation, registration, readout control, and printer 5 control in this electronic typewriter. The slave microcomputer 122 is
Controls the display of the liquid crystal display device 4. This LCD display group! 2!4 includes a liquid crystal display element panel 130, a segment decoder 131 and a column decoder 132 as driver LSIs, and a microcomputer 13.
This is an LCD module consisting of 3 components.

ROM12B has a capacity of 1, for example, 32 bytes.
It is OM, and includes a control program for writing text on this electronic typewriter, a printer control program for controlling printing by the printer 5, and a liquid crystal display group for character codes! A plurality of character generators (for example, for English, German, French, Dutch, etc.) that convert into the display character pattern of t4, a printing pressure table that converts the character code to printing pressure, and the amount of space. Proportional space amount table to convert, wheel address table to convert to wheel address.

It stores a code conversion table such as a ribbon feed amount table for converting into a ribbon feed amount.

The RAM 124 is composed of two RAMs having a capacity of, for example, 2 bytes, and one of the RAMs stores a working area for program execution, a creation printing pressure table area for storing a creation printing pressure table, and data. It is used as a data area, and the other RAM is backed up by a battery 128 and used as a text memory in which text (text, phrases, etc.) files and directories are registered.

The R10 board 127 is an RO board that stores a control program, etc. for using the printer 5 of this electronic typewriter as a receive/online (R10) printer.
M134, and an interface (I/F) circuit 135 and r1013G that take in data input from the outside.

The memory card 8 includes a RAM 138 for registering one sentence, etc.
Battery 1'59 backs up this RAM138
and ROM 140 for storing programs.

The master microcomputer 121 takes in key information input from the keyboard 3 and transmits the input data to the liquid crystal display device 4 using the slave microcomputer 122.
In addition, each part of the printer 5 is controlled according to the input data to print.

That is, the mask microcomputer 121 outputs selection drive data to the selection driver 141 via the l10126 to drive and control the selection motor 66, rotates the type wheel 3 in a predetermined direction by the required type, and prints the required type. Place it in a position where it will be hit by the print hammer 67.

In addition, this master microcomputer 121 outputs a detent drive pulse to the detent hammer driver 142 via l10126 to drive the detent hammer magnet 1.
43, the gear interposed between the type wheel 36 and the selection motor 66 is detented by the detent hammer 144, and in this state, a print hammer drive pulse is output to the print hammer driver 145 via l10126 to print. hammer magnet 6
8 is driven and controlled to cause the print hammer 67 to hit a desired type on the type wheel 36.

Furthermore, the mask microcomputer 121 outputs a collection ribbon lift drive pulse to the collection ribbon lift driver 147 via l10126 to drive and control the collection ribbon magnet S7 to position the collection tape 110 at the collection position as described above. .

Furthermore, this master microcomputer 121 is 1101
A ribbon feed drive pulse is output to the ribbon feed driver 148 via 2G to drive and control the ribbon feed motor 77, thereby feeding the ribbon 40.

The mask microcomputer 121 also outputs space drive data to the space driver 149 via l10126 to drive and control the space motor 45 to move the carriage 35 in a predetermined direction by a required amount.

Furthermore, this master microcomputer 121 is l10126
The line feed drive data is output to the line feed driver 150 via the line feed motor 23.
is driven and controlled to rotate the platen 22 in a predetermined direction by a required amount.

Furthermore, this master microcomputer 121 is l10126
via the ribbon end sensor 86. Selection home sensor 72. Space home sensor 151. Detection signals from sensors such as the cover open switch 10 and the ribbon identification switch 85 are taken in, and control is performed according to these detection signals.

Next, various operations and processes in this electronic typewriter will be explained with reference to FIG. 9 and subsequent figures.

FIG. 9 is a block diagram showing details of the memory card 8.

This memory card 8 is connected to the battery 139 as described above.
RAM 138 as writable and readable non-volatile memory backed up by
14Q, and as described above, by attaching the connector 8A to the connector 9A on the main body side, it can be attached to and detached from the main body.

Furthermore, this memory card 8 includes a decoder 161 for permitting/prohibiting access (use) to the RAM 138.
．． Comparator 1S2. It also includes a latch 163 and an OR circuit 164.

The decoder 161 is the master microcomputer 121 on the main body side.
When the decoding result is a predetermined comparison code, a chip enable signal CE is output via the OR circuit 164, and the input data from the RAM 138 is decoded.
The data registered at a predetermined address (this data is referred to as a "PIN number") is read out.

In addition, the comparator 162 compares the data (password) read from a predetermined address in the RAM 138 with the code inputted from the master microcomputer 121 on the main body side after the comparison code, and then identifies the registered password. When a password matching the number is input, a chip enable signal GE (usage permission signal) is output to the latch 163.

Furthermore, the latch 163 latches this chip enable signal CE and outputs it to the RAM 138 via the OR circuit 164 to make the RAM 139 accessible (usable). When the chip is removed, the attachment/detachment signal at that time becomes a clear signal, and the latched chip enable signal GE is cleared.

Furthermore, a predetermined input line (terminal) of the connector 9A to which the connector 8A of the memory card 8 of the master microcomputer 121 is connected is connected to the power supply voltage +V with a pull-up resistor 165.
On the other hand, on the memory card 8 side, the terminal of the connector 8A corresponding to that line is connected to ground, and depending on the installation of the memory card 8, a high level "H" or a low level is output to the master microcomputer 121. A signal of "L" (this is referred to as "rROM presence/absence signal") is input.

Next, the use of the memory card 8 will be explained.

When the memory card 8 is installed and the RAM 339 is used as an external file, by inputting the password for the text from the keyboard 3 when registering the text, the text is registered in a predetermined area of the RAM 138, and the text can be input. The entered password is registered at a predetermined address in the RAM 138.

Therefore, when reading the text registered in the RAM 13g, by inputting the password from the keyboard 3,
The master microcomputer 121 first outputs a predetermined comparison code to the memory card 8, and then outputs the input password to the memory card 8.

At this time, the decoder 161 of the memory card 8
When the comparison code from the microcomputer 121 is input, a chip enable signal CE is output to read out the data of the password registered at a predetermined address in the RAM 13J3.

Therefore, the comparator 162 compares the read password with the password input from the master microcomputer 121 and outputs the chip enable signal GE only when they match, allowing access to the RAM 13B. do.

By doing this, it is possible to register not only the type format but also sentences in the memory card 8. Moreover, the sentences registered in the memory card 8 can be read only when the registered password is entered, so the sentences can be registered in the memory card 8. confidentiality can be maintained.

Further, the ROM 140 of the memory card 8 stores programs and the like for executing additional functions of this electronic typewriter.

Therefore, the mask microcomputer 121 uses this memory card 8.
When a code to use the function of the ROM 140 (external ROM) is input, the ROM present/paid/non-signal line of the connector 9A to which the connector 8A of the memory card 8 is attached is checked, and the memory card 8 is inserted. Sometimes, it jumps to or calls the start address of this ROMI 40 to execute an external ROM function, and when the memory card 8 is not installed, it responds by displaying this fact to the operator.

Note that a decoder 161 and a comparator 162 are used to control access permission to the RAM 138 provided in the memory card 8.
It is also possible to provide a circuit such as this or a function such as this (when controlled by a program) in the main body.

Figure 10 is a liquid crystal display device! FIG. 4 is a block diagram illustrating display mode switching control of No. 4;

The control section 171 includes the mask microcomputer 121 and the slave microcomputer 121.
This is a part of the microcomputer 122 that has functions related to input control and display control of the liquid crystal display device 4.

This control unit 171 takes in the data input from the keyboard 3 to the FIFO format key buffer 125 and stores display data therein in the display buffer 17.
2, and also increments (+1) or decrements (-1) the adder/subtractor 173 according to the data of the cursor movement key to update the cursor pointer 174 indicating the address where the store data of the display buffer 172 is stored, and further Data for updating the carriage position or current line is sent to counter display buffer 175.

On the other hand, a flip-flop circuit r (hereinafter referred to as "FF circuit") 176 connects to a terminal a mode switching signal MC of a high level "H" which is output every time a mode switching switch SW consisting of a self-returning bushing switch is pressed. Enter
The Q output is outputted to the control section 171 and the display buffer 172 as a display character number switching signal as a display mode switching signal.

This display buffer 172 stores display data for, for example, 40 characters before the address indicated by the cursor pointer 174 when the display character number switching signal, which is the Q output of the FF circuit 176, is 0", and when the display character number switching signal is I". At this time, display data for, for example, 37 characters before the address indicated by the cursor pointer 174 is sent to the character generator (CG) 181 via the OR circuit 180.

Note that the number of characters of the data to be sent varies depending on the maximum number of display characters (maximum number of display digits) of the liquid crystal display device 4 and the number of digits required to display the carriage position or line number.

Further, the counter display buffer 175 is connected to an AND circuit 1 whose other input is the display character number switching signal from the FF circuit 176.
79 and the OR circuit 180.
Send to G181.

The CG 181 uses the input data as access data and outputs display pattern data corresponding to the input data to the liquid crystal display device W4.

Next, the display mode switching operation of the liquid crystal display device 4 will be explained.

First, the cursor pointer 174 indicates address O as the address of the display buffer 172 by initial setting.

When data is input from the keyboard 3 to the buffer 125, the control unit 171 sets the adder/subtractor 173 to +1, increments the cursor pointer 174 (+i), and stores the input data at that address.

Similarly, the control unit 171 decrements (-1) the cursor pointer 174 when the cursor back key 17 of the keyboard 3 is input, and decrements the cursor pointer 174 when the cursor forward key 18 is input.
Increment 4 (+1).

Further, the control unit 171 stores the count value of the current line or carriage position in the counter display buffer 175 every time one character is input from the keyboard 3.

Therefore, by operating the mode changeover switch SW and inputting the mode changeover signal MC to set the Q output of the FF circuit 176 to 0'', the display buffer 172 sends display data of, for example, 40 characters to the CG 181. Display data for characters is displayed on the liquid crystal display device 4.

At this time, the AND circuit 179 that inputs the Q output of the FF circuit 176 is closed, so the counter display buffer 1
The output of 75 is inhibited and is not input to CG181.

Therefore, the liquid crystal display device 4 displays text data rABCD . . . XYZ4J for the maximum number of display characters (40 characters) as shown in FIG. In addition, r
4J is a cursor mark that also serves as a separator.

In addition, by operating the mode changeover switch SW and inputting the mode changeover signal MC to set the Q output of the FF circuit 176 to 1'', the display buffer 172 sends display data of, for example, 37 characters to the CG 181. Display data for characters is displayed on the liquid crystal display device 4.

At this time, the AND circuit 179 that inputs the Q output of the FF circuit 176 is open, so the counter display buffer 1
The count value data from 75 is also sent to the CG 181, and the count value of the line or carriage position is displayed on the liquid crystal display display 4.

Therefore, as shown in FIG. 12, the liquid crystal display device 14 displays text data "D...
YZtJ and r123J indicating the number of lines for up to 3 characters
A total of 40 characters are displayed.

In other words, in general, electronic typewriters display characters input on the display device, and also use a part of the display area to display a carriage position management counter or a line management counter. The number of lines is not always necessary.

Therefore, operability is improved by making it possible to switch between a display mode in which the entire display device is used to display text and a display mode in which a portion is used to display the carriage position or number of lines.

Note that in the above configuration, the number of display modes can be easily increased by increasing the number of FF circuits, and by providing a decoder, a large number of modes can be switched using a DIP switch or the like.

Further, in the above configuration, if the output of the display buffer 172 is input to the OR circuit 180 via an AND circuit whose other input is the equal sign obtained by inverting the Q output of the F circuit 176 with an inverter, the display buffer 172 The display can be completely switched between displaying the data in the counter display buffer 175 or displaying the data in the counter display buffer 175.

FIG. 13 is a block diagram for explaining another example of display control of the liquid crystal display device 4 and print control of the printer 5.

The control unit 191 has a master microcomputer 121 and a slave microcomputer 121.
This is a portion of the microcomputer 122 that has functions related to control of the liquid crystal display device 4 and printer 5.

This control unit 191 takes in the data input from the keyboard 3 to the FIFO format thousand-buffer 125, sends the print data therein to the display buffer 193 via the OR circuit 192, and also sends the data of the cursor movement key to the display buffer 193. Increment (+1) the adder/subtractor (A/5) 194 according to
Or the display pointer 195 indicates the address where the display data of the display buffer 193 is to be stored by decrementing (-1).
Update.

In addition, when printing a code, this control unit 191 adjusts the current position of the carriage by the character space indicated by the wheel sense signal based on the input result of the wheel sense signal (indication [7I of the input signal line is omitted). Update the count value of counter (ABS) 19G. Tab (T
AB) The memory 197 stores tab positions. The subtracter 19B inputs the carriage current position counter 1S when the TAB code from the control unit 191 is Ly gill 9.
The count value of 6 is compared with the next tab position in the tab memory 197, the difference is converted into a space code (SP code), and this space code is output to the display buffer 193 via the OR circuit 1 day 2.

The display data (including space codes) stored in the display buffer 193 corresponding to the number of previous display characters from the address indicated by the display pointer 195 is sent to the character generator (CG) 199 and converted into display pattern data. and is displayed on the liquid crystal display device 4.

Further, data sent from the display buffer 193 is sent to the table ROM 202 via an AND circuit 201 whose other input is the output of an OR circuit 200 which inputs a CR (carriage return) code and a tab code from the control section 191.
given to.

This table ROM 202 contains character codes such as wheel position (wheel address) and printing pressure.

It stores a code conversion table (hereinafter simply referred to as "r table") for converting ribbon feed amount and proportional space layer, and also has a type wheel 36 made in each country.
A plurality of tables depending on the type, for example table A depending on the type wheel for the United States.

It is equipped with Table B, which corresponds to the type wheel for the UK, and Table C, which corresponds to the type wheel for Italy.

Then, one of the tables in the table ROM 202 is selected according to the wheel sense signal, and this table converts the character code into a wheel address, printing pressure, ribbon feed amount, and proportional space amount, and sends them to the print buffer 203. .

Further, the wheel sense signal is input to the status CG 204 and converted into display pattern data, and the type of type wheel 36 mounted is displayed on the liquid crystal display device 4.

Next, the operation of this display/print control section will be explained.9 First, the determination of the type of type wheel 36 will be explained with reference to FIG.

To explain the abbreviations in this process flow diagram, step error step SES is type wheel 3S.
The number of steps is set to a value greater than the number of steps required to rotate once plus the number of steps corresponding to the width of the N-th home position identification mark I.

Step stop step Sss is marked MII
is the number of steps of the selection motor 66 from to stopping the type wheel 36, and marks Mll and V
The number of steps n is set to be larger than the maximum allowable interval with W.

The count value m is the number of steps for determining whether or not the home pulse from the selection home sensor 72 is a home position pulse detected by the mark MH.
The pulse width of the home pulse corresponding to H is set by the number of ml steps.
, when the number of steps in the pulse width of the home pulse corresponding to the mark MW is m W (m W < m H),
The value satisfies the condition of m 11≧m ) m W, and here it is set to m := m H.

Therefore, referring to FIG. 14, first set the step error step SES in the counter CNTl, reset the counters CNT2 and CNT3 (to 0''), rotate the selection motor 66 by one step, and set the counter CNTl. Increment (+1).

Then, it is determined whether or not a home pulse is input from the selection home sensor 72.

At this time, if the home pulse is not input, the counter CNT2 is reset, then it is determined whether the counter CNT is ○ or not, and if the counter CNT1 is not ○, it is set to 1 again.
Return to step rotation processing.

Also, if the home pulse is input, the counter CNT
After incrementing 2 (+I)L, counter CNT
2≧m or not, and if the counter CNT2≧m is not, the home pulse is not a home position pulse due to the detection of the mark Mll, so the above-mentioned counter CNT1=
The process moves on to the determination process from O.

Then, when the counter CN T 2≧m, that is, if the home pulse is the home position pulse detected by the mark M II, the selection motor 66 is activated after setting step/stop/step SSS in the counter CN T 1. Rotate one step and counter CNT
Decrement 1 (-1).

Thereafter, as will be described later, it is determined whether a flag F, which is set ( ]'') when a home position pulse is detected, is F=0.

At this time, if the flag F=0, after incrementing the counter CNT3 (+1), it is determined whether the home pulse when the selection home sensor 72 detected the mark MW has been input, and the home pulse is input. If not, the process returns to the one-step rotation process of the selection motor 66, and if the home pulse is input, the flag F is set to F=1.

Thereafter, if the flag F is not 0, it is determined whether the counter CNT1 is 0, and if the counter CNT1 is not 0, the process returns to the one-step rotation process of the selection motor 66.

Then, when the counter CNT1 becomes 0.

The position is set as the wheel home position, that is, after the home position pulse is detected, the position where the type wheel 56 is rotated by a predetermined number of steps n is set as the home position, and after the type wheel 36 is stopped, the counter value of the counter CNT3, ie, the mark The type of type wheel 36 is determined based on the distance between MH and mark MW.

A table corresponding to the type of the type wheel 36 is selected by applying the determination result of the type wheel 36 to the table ROM 202 as a wheel sense signal. Further, the status CG 204 converts it into display data and displays it on the liquid crystal display device 4. For example, when the type wheel 3rd is destined for the United States, the rUs portion of rWHEELJ indicating the wheel type lights up as shown in FIG.

In this way, you can change the character code to the wheel address.

A table corresponding to the type wheel for each type is prepared as a table for converting printing pressure, ribbon feed amount, and proportional space amount, and by detecting the type of wheel and selecting the table, It is no longer necessary to have a memory that stores different tables in the machine, and it can be used with any number of type wheels, improving operability and versatility.

Furthermore, by displaying the type of type wheel, it is possible to know the type of the type wheel installed, which eliminates errors in mounting the type wheel and improves operability.

In addition, instead of automatically detecting the type of type wheel as described above, or in addition to automatic detection, a manual switch such as a DtP switch is provided to indicate the type of type wheel, and the system responds to instructions from this switch. You can also select a table by

Next, the operation of displaying and printing input data will be explained.

When the data input from the keyboard 3 to the buffer 125 is a print code, the control unit 191 controls the display buffer 1 in which this print code is indicated by the display pointer 195.
Stored at address 93.

At the same time, the carriage current position counter (ABS) displays the character space according to the type of type wheel 36 indicated by the wheel sense signal (or instruction signal from a switch).
Set to .

As a result, the print code stored in the display buffer 193 is converted into display pattern data by the CG 199 and displayed on the liquid crystal display device 4.

Further, when the control unit 191 inputs a CR code from the keyboard 3, it outputs the CR code via the OR circuit 200, thereby opening the AND circuit 201, and moving the display pointer 195 from the buffer head address of the display buffer 193. The print data up to the address specified by is sequentially transferred to the table ROM 202 via the AND circuit 201.
is given as access data to the print buffer 2, which is converted into the wheel address, printing pressure, ribbon feed amount, and proportional space amount according to the table selected according to the type of type wheel 36 as described above.
03 and printed by the printer 5.

Further, when the control unit 191 inputs a tab code from the keyboard 3, it gives this tab code to the AND circuit 201 via the OR@path 200, so the print code of the display buffer 1S3 is is printed.

At the same time, this tab code is also given to the subtracter 198, and the subtracter 198 counts the carriage current position counter (AB
S) Compare the count value 196 (current carriage position) and the next tab position in the tab memory 197, convert the difference into a space code (SP code), and output it to the display buffer 193 via the OR circuit 192; The data in the display buffer 1S3 is transferred to the print buffer 203 via the table ROM 202, and the carriage moves to the next tab position.

Note that the display pointer 195 is cleared when the data in the display buffer 1S3 is transferred, and is prepared for displaying/printing the next line.

Next, the on/off display control of underline and bold symbols will be explained.

First, when the cursor back key 17 is pressed down, as shown in FIG. Determine whether it is an address or not.

At this time, if the pointer A is not the head, there are characters in the display buffer 193, so the next underline (r
ULJ) is off (UI, = off) or not, and if UL = off, the underline flag (UL flag) is set to "1", and if UL = off, then next It is determined whether UL=ON or not, and if UL=ON at this time, the UL flag is reset to rOJ, and if UL=ON is not ON, the process directly proceeds to the next process.

Then, pointer A is decremented (-1) L.

After decrementing (-1) pointer B, which is used to store the character returned when the cursor is back, pointer A
The contents of pointer B (represented by "pointer (A)") are set to the contents of pointer B (represented by "pointer (B)"), and the previous n characters from pointer A are displayed.

Next, when the cursor forward key 18 is pressed, it is determined whether the pointer B is at the end (END) address of the display buffer 193, as shown in FIG.

At this time, if pointer B is not at the end of display buffer 1/3, there is a character, so the contents of pointer B are read and it is determined whether the read data is an underline (UL) off code or not.

Then, if the read data is a UL off code, the U
Determine whether L flag = 1 or not. If UL flag = 1, increment pointer B (+1) and return to determining whether B = end or not. If UL flag = 1, UL
After resetting the flag to "0", the process moves on to fire processing.

Also, if the read data is not UL off, it is determined whether UL is on or not, and if UL is on, the UL flag is set to "1".
After setting the pointer (B) to the pointer (A), if the UL is not on, proceed to the next process.9 Then, after setting the pointer (B) to the pointer (A), increment the pointer A (+1) and increment the pointer B ( +1)
Then, the previous n characters from pointer A are displayed.

Next, when the collection key 12 is pressed,
As shown in FIG.
Determine whether it is the head (HEAD) address of Party B.

At this time, if the pointer A is not the head, there are characters in the display buffer 193, so first it is determined whether the underline UL is off (tJL = off), and if UL = off, the underline flag (UL flag ) is set to "1", and if UL = OFF, then it is determined whether UL = ON or not, and if UL = ON at this time, the UL flag is set to r(N, then UL is = If not on, proceed directly to the next process.

Then, pointer A is decremented (-1) L.

After that, the previous n characters from pointer A are displayed.

To explain these processes in detail, first, as shown in FIG. When an underline is set to (the underline symbol on the left is an underline on symbol and the underline symbol on the right is an underline off symbol), data is stored in the display buffer 193 as shown in the figure (b). Pointer A indicates the next address of the underline off symbol on the right, and pointer B indicates the end address.

Here, when the cursor bank key 17 is pressed down, the cursor, or pointer A, moves to the address of the underline symbol on the right, and since this underline symbol is an underline off symbol (tJL off), as explained in FIG. Since the UL flag is set to rlJ and the pointer (A) is set to pointer (B), the display on the liquid crystal display device 4 is updated as shown in FIG. The contents of are updated as shown in the same figure (b).

From this state, use the cursor back key 1 in the same manner.
If you return to the first underline symbol by 7,
LCD display F! The display of i4 is updated as shown in FIG. 21(A), and the contents of the display buffer 193 are updated as shown in FIG. 21(B).

In this state, when the correction key is pressed down, the display of the underline on symbol on the liquid crystal display device 4 in FIG. 21(a) disappears, and the pointer A in FIG. 21(b) disappears.
First! It became 7rI (head).

The UL flag is reset to "0".

Then, when the cursor forward key 18 is pressed down after returning the display of the liquid crystal display device 4 to the one shown in FIG. 22 (a), the U
Since the L flag is set to 20, the underline off symbol at pointer B is ignored.

In this way, when displaying the underlined on/off symbol, the setting flag is changed based on the status setting flag when the display forward direction movement code is displayed, so the operator's display is the same as the Δ diagram. control.

In other words, in the past, there was no distinction between on and off, so when an on symbol was collected, the off symbol turned on, and the underline control was reversed, resulting in the opposite of what the operator intended. Things will disappear.

Note that display control of not only underlines but also symbols such as bold can be similarly implemented.

Next, referring to FIG. 23, a description will be given of a process for storing input characters in an automatic correction buffer and correcting the font of characters that have already been input in a printing mode.

To correct the font of characters that have already been input, press the cursor back key 17 in the same way as for normal collection.
．． Use the cursor forward key 18, line feed key, reverse line feed key, etc. to move the carriage to the position of the character to be corrected. At this time, the pointer indicating the input address of the automatic correction buffer is also updated in accordance with the movement of the carriage.

So, for example, by pressing down on the bold key,
The character at the current pointer, that is, the current carriage position is read from the automatic correction buffer, and rJ1 determines whether or not the character is a bold character. If it is not a bold character, the printer 5 is controlled to overprint the character to make it a bold character. At the same time, the contents of the automatic correction buffer are also changed to bold characters.

Furthermore, when the underline key is pressed, an underline is added and printed in the same way, and the contents of the automatic correction buffer are also changed to characters with an underline.

By doing this, the font style of characters can be corrected in the same way as in a normal collection, and the operability is improved. In other words, in the past, if you wanted to correct the font of a character that you had already input, you had to correct the character and type it again, but now you can do it in one operation without having to correct the character. The font can be corrected.

For example, if the character is already a bold character when you press the bold key, you can automatically perform a collection operation to collect the character, and then print the character again normally. It is also possible to easily change from to normal characters. The same applies to underlines.

In the above embodiment, an example was described in which the present invention was implemented in an electronic typewriter as a printing device.
The present invention is not limited to this, and can be implemented in various printing devices such as a word processor or a printer in which an input device and a display device are connected.

Layer-2" As explained above, according to the present invention, the functions of the printing device can be improved.

[Brief explanation of drawings]

1 and 2 are an external perspective view showing an example of an electronic typewriter embodying the present invention, and a perspective view showing its internal structure; FIG. 3 is a perspective view showing the printer mechanism;
The figure is an exploded perspective view showing details of the carriage, Figures 5, 6 and 7 are a front view, side sectional view and front view of the type wheel, and Figure 8 is the electronic typewriter. Figure S is a block diagram explaining the configuration and control of the memory card 8; Figures 10, 11, and 12 are blocks explaining the display mode switching control. FIG. 13, FIG. 14 to FIG. 22 are block diagrams, flow diagrams, and explanatory diagrams for explaining display/print control. FIG. 23 is a flow diagram for explaining the font correction process. 3... Keyboard 4... Liquid crystal display device 5... Printer 8... Memory card 22...
...Platen 35...Carriage 3 days...Type wheel 40...Ribbon 70...Selection...
Hammer unit 75...Ribbon feed +1 & structure 90...Collection mechanism 120...Main controller 122...Slave microcomputer 123...
...ROM 124...RAM Fig. 2 Fig. 5 Fig. 6 ■ Fig. 7 Fig. 9 Fig. 11 Fig. 12 Fig. 16 Fig. 19 ^ Neck Fig. 21 Large Neck Fig. 22

Claims (1)

[Claims] 1. When a removable memory card with writable and readable memory is used in a printing device that prints according to input data from an input device, and a code that matches the code registered in the memory of the memory card is input. 1. A printing device comprising: permission means for permitting use of the memory card only by users.