JPS625872A - Electronic typewriter - Google Patents

Abstract

PURPOSE:To enhance operability in correction, by providing a function of correcting a character string including a character at the current carriage position. CONSTITUTION:A keyboard 1 is provided with a group of a alphanumeric keys 11, a correction key 12 for commanding correction of a character, a word key 13 for commanding correction of a character string in combination with the correction key 12, a correction end key for commanding finishing of the correction of a character, and other various function keys. An ETW controlling part starts execution of processing when the correction key 12 is depressed and when the word key 13 and the correction key 12 are depressed. A printer 3 corrects a printed character by positioning a correction tape to an impact position, selecting a type corresponding to a designated character code, and driving a printing hammer 38 to make an impact on the type.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an electronic typewriter having a character erasing function.

Generally, electronic typewriters are equipped with a correction (character erasing) function for erasing printed characters in order to correct typographical errors.

However, with the correction function of conventional electronic typewriters, when correction is instructed, only one character is deleted from the carriage position at that time.

Therefore, even when you want to erase several characters, you have to press down the collection key by the number of characters you want to erase, so there is a problem that the operability of the collection operation when erasing multiple characters is poor.

This invention has been made in view of the above points, and aims to improve the operability of collection operations.

Structure In order to achieve the above object, the present invention is provided with a function of erasing a character string including the character at the current carriage position.

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

FIG. 1 is a block diagram showing one embodiment of the present invention.

In this electronic typewriter, when a character deletion control means A is instructed to delete a character string, a collection mechanism B
to erase the string containing the character at the current carriage position.

FIG. 2 is an external perspective view showing an example of an electronic typewriter embodying the present invention.

This electronic typewriter includes a keyboard 1 for inputting various character information and control information, and a liquid crystal display capable of displaying a portion of one line, for example, 16 to 26 characters, for displaying text input by the keyboard 1. LCD
), and a type wheel type printer 3 for printing text and the like.

The keyboard 1 also includes a group of A/N keys 11 and 1
A collection key 12 for instructing character deletion, a word key 13 for instructing deletion of a character string in combination with this collection key 12, and a collection end key 14 for instructing completion of character deletion.

It also has various other function keys.

The printer 3 is also equipped with a cover 6 on its top surface that can be opened and closed for ribbon replacement, typeface replacement, etc., and a paper guide 8 equipped with a paper edge guide 7 at the rear that guides the left end of the printing paper to be inserted. It is equipped with.

3 and 4 are a schematic plan view and a front view showing an example of the mechanical part of the printer 3. FIG.

In this mechanical section, a platen 22 is rotatably mounted between frames 21 and 21, which wraps and feeds paper to be printed.

This platen 22 is moved by a motor gear 24. An idle gear 25, an idle gear 26 that moves together with the idle gear 25, and a platen gear 2
7 to automatically feed paper.

Furthermore, a manual operation knob 28.28 is fixed to the end of the platen 22, and by turning this knob 28.28, paper can be manually loaded or removed.

Further, in front of this platen 22, a pail roller 30 is provided.
The paper pail 31 equipped with the paper pail 31 is urged toward the platen 22 and is swingably disposed.

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.

This carriage 35 has a cassette type type wheel 36.
A selection motor 37 consisting of a stepping motor equipped with a printer, a printing hammer 38 for hitting the type on a type wheel 36, a ribbon cartridge 41 loaded with an ink ribbon 40, and a collection mechanism etc. to be described later are provided.

A paper guide 42 is attached to the front of the carriage 35 to guide the paper to the platen 22 when paper is inserted, and the carriage 35 is moved to the left hand position (LHM) when paper is automatically inserted or when paper is ejected. and the right hand position fil (RHM), and the paper guide 42 guides the printing paper.

Then, a space motor 45 consisting of a stepping motor is attached to a subframe (not shown), and a space pulley 46 is fixed to its rotating shaft.
Two pulleys 47 and 48 are fixed to the support plate (not shown).
These pulleys 46, 47.4
8 is stretched with a space wire 4, the space wire 4 is fixed to the bottom of the carriage 35, and the carriage 35 is moved by a space motor 45.

In addition, the selection motor 37 and the space motor 45
may be configured with a servo motor, or may be configured with a stepping motor and may be controlled in a closed manner using an encoder (open control in this embodiment).

Further, a carriage home sensor 50 consisting of a transmission type photosensor is attached to the rear surface of the carriage 35, while
A sensor plate 51 is attached to the right frame 21, which enters the gap between the carriage home sensor 50 when the carriage 35 is located at the home position.

Next, a ribbon lift mechanism including a collection mechanism mounted on the carriage 35 will be described with reference to FIGS. 5 to 7.

First, the ribbon holder 60 to which the ribbon cartridge 41 is attached is swingably attached to a carrier frame (not shown) constituting the carriage 35 by means of an attachment shaft 61.

And, in the middle of one side of this ribbon holder 60.

An engaging piece 62 is formed by integrally forming a first engaging claw 63 and a second engaging claw 64 extending in parallel in the horizontal direction.

A reel 67 loaded with a collection tape 66 made of peel-off tape (or overcoat tape) is rotatably attached to the front upper surface of the ribbon holder 60 (below the ribbon cartridge 41), and a reel 67 loaded with a collection tape 66 made of peel-off tape (or overcoat tape) is rotatably attached. The collected collection tape 66 is mounted on the other reel (not shown) via a guide roller and stretched between the platen 22 and the type wheel 36 in the axial direction of the platen 22.

On the other hand, a first solenoid 71 and a second solenoid 72 are installed in the middle of the lower part of the ribbon holder 60 for each plunger 7.
1 a, 72. It is placed facing upward.

Plunger 72 of the second solenoid 72. In this case, one end of an abbreviated arm 74 swingably supported by a support shaft 73 is attached to the carrier frame by engagement with an elongated hole and a pin.

Further, a bent portion 75 is formed at the other end of the arm 74. Note that the support shaft 73 and bending portion 75 of this arm 74 are connected to the first and second engaging claws 63.6 of the ribbon holder 60.
4.

Next, to explain the operation of this ribbon lift mechanism, first, when neither the first solenoid 71 nor the second solenoid 72 is operating, each plunger 71a,
72a are all pulled down, and the ribbon holder 6
0 is held at the position shown in FIG. 5 (first position).

Therefore, at this time, both the ink ribbon 40 and the collection tape 66 are attached to the type characters 36 of the type wheel 36. It is located below the platen 22, and allows you to check the printing status and correction status of the paper set on the platen 22.

Then, by operating the first solenoid 71 from this state, the plunger 71a rises, the ribbon holder 60 swings counterclockwise in the figure, and the second engaging claw 64 moves as shown in FIG. is held at a position (second position) where it engages with the bent portion 7S of the arm 74.

Therefore, at this time, since the ink ribbon 40 faces the type characters 36a of the type wheel 36, printing can be performed.

Furthermore, when both the first solenoid 71 and the second solenoid 72 are actuated, the respective plungers 71a and 72 rise, and the ribbon holder 60 further swings counterclockwise.
As shown in FIG. 7, the first engaging claw 63 is held at a position (third position) where it engages with the support shaft 63 of the arm 64.

Therefore, at this time, since the correction tape 66 faces the type characters 36a of the type wheel 36, corrections can be made.

Incidentally, by also operating the first solenoid 71 when changing from the standby state (first position 5) to the collection state (third position) shown in FIG. 5, the second solenoid 72 can be made smaller. .

Furthermore, in this case, by slightly delaying the activation timing of the second solenoid 72 from the activation timing of the first solenoid 71, hunting of the cassette holder 60 can be quickly suppressed.

Note that the collection tape 66 is fed by a predetermined amount by the launch mechanism as the ribbon holder 60 swings, but this point is not shown in the drawings.

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

This ETW control unit 80 includes a CPU 91. A microcomputer that also serves as character erasing control means controls the entire electronic typewriter, consisting of ROM82 and RAM83.
system, and a correction memory 84 that sequentially stores the created text data.

It also includes a text memory 85 for storing created text.

The ETW control unit 80 also serves as a buffer memory for controlling data input from the keyboard 1 and data transfer from the ETW control unit 80 to controlling the lighting of LEDs provided on predetermined keys of each key on the keyboard 1. It also includes a keyboard interface 86, a display controller 87 including a display buffer that controls the display of the liquid crystal display 2, and a printer interface 88 that controls the exchange of print data, ready signals, etc. with the printer 3.

FIG. 9 is a block diagram showing an example of a control section of the printer 3.

The main controller 90 includes a master microprocessor 91, a slave microprocessor S2, and an RO
It consists of M93, RAM94, 11095.96, etc.

The mask microprocessor S1 is, for example, an 8-bit C
This circuit consists of a PU, ROM, RAM, Ilo, etc., and is in charge of controls other than line feed and space control of this printer.

The slave microprocessor S2 is composed of, for example, an 8-bit CPU, ROM, RAM, Ilo, etc., and is a circuit that controls the line feed and space control of this printer.

The ROM 93 includes, for example, a program area for storing control programs, a conversion table area for storing a code conversion table for converting character codes from the ETW control unit 80 into type position data, printing pressure data, ribbon feed amount data, etc., and other fixed areas. Configure other areas for storing data.

The RAM 94 constitutes a reception buffer area for temporarily storing received data from the ETW control unit 80, a working area for program execution, a data area, and the like.

Then, the mask microprocessor S1 takes in various data such as print character data transferred from the ETW control unit 80 to the 11095, space data for instructing the carriage movement amount, and line feed data for instructing line feed. Processing is performed based on the received data.

That is, this master microprocessor S1 outputs a hammer drive pulse to the hammer driver 100 via the machine/○S6, drives and controls the hammer magnet 38A that constitutes the printing hammer 38, and drives the printing wheel 36 by the hammer 38B. Let them hit the printed words.

Also, this mask microprocessor 61.

Selection drive data is output to the selection driver 101 via the S6, the selection motor 37 is rotationally controlled, the type wheel 3 is rotated by the required amount in a predetermined direction, and the required type is printed by the printing hammer 38.
position to be hit by.

Furthermore, this mask microprocessor S1 is l1
096 to the ribbon feed driver 102 to drive and control the ribbon feed motor 103 consisting of a stepping motor,
Feed the ribbon 40.

Furthermore, this mask microprocessor S1 is
Based on the collection instruction data from the ETW control unit 80, a ribbon lift drive pulse is output to the ribbon lift driver 104 to drive and control the first solenoid 61 and the second solenoid 62, respectively, at predetermined timings to remove the collection tape. 66 is positioned at the impact position by the printing hammer 38.

Note that the first solenoid 61 is similarly controlled to position the ink ribbon 40 at the impact position by the printing hammer 38.

Moreover, this mask microprocessor 91 is
96, a home pulse from the carriage home sensor 50, a state signal of the cover open switch 105 that detects opening/closing of the cover 6, and signals from various sensors such as a ribbon end sensor (not shown) are taken in.

The mask microprocessor S1 also sends line feed data and carriage movement data to the slave microprocessor 92.

On the other hand, the slave microprocessor 92.

Line feed drive data is output to the line feed driver 106 to drive and control the line feed motor 23 to control rotation of the platen 22 and control line feed and back line feed.

Further, this slave microprocessor S2 outputs space drive data to the space driver 107, drives and controls the space motor 45, and drives the carriage 35.
to move the required amount in a given direction.

Next, the operation of this embodiment configured as described above will be explained with reference to FIG. 10 and subsequent figures.

The ETW control unit 80 controls when the collection key 12 is pressed and when the word key 13 and the collection key 1 are pressed.
When 2 is pressed down, execution of the process shown in FIG. 10 is started.

First, it is checked whether the word key 13+collection key 12 has been pressed to determine whether character string collection has been instructed.

At this time, when the word key 13 + collection key 12 is pressed, that is, character string collection is instructed, the character code of the current address pointer (corresponding to the current carriage position) of the correction memory 84 is read out, and the character code of the current address pointer (corresponding to the current carriage position) is read out. Determine whether the character code is a space code.

If it is not a space code, it instructs the printer 3 to perform a correction (also sends correction data) and erases the character of the current address pointer.

At this time, the printer 3 positions the collection tape 66 at the impact position as described above, selects the printed characters of the designated character code, and then drives the printing hammer 38 to impact the printed characters. Erase characters.

Thereafter, it is determined whether or not the collection end key 14 has been pressed down, and if the collection has not ended, the address pointer of the correction memory 84 is decremented (-1).
Press L to return to the previous character code position. As a result, the carriage 35 also backspaces by one character.

Thereafter, the character code of the address pointer is read again and the above-described process is executed.

If the read character code is a space code without pressing the collection end key 14,
At that point, this collection process ends.

In other words, when specifying a collection of strings,
Unless an instruction is given to end the collection midway through, the character string from the character at the current carriage position at the time of the collection instruction to the previous space is erased.

Furthermore, if the collection end key 14 is pressed while no space code appears in the read character codes, the collection process is ended at that point.

That is, even when an instruction is given to erase a character string, by instructing to end the collection midway through, the character string from the character at the current carriage position at the time of the collection instruction to the collection end instruction is erased.

On the other hand, when only the correction key 12 is pressed, the character code of the current address pointer in the correction memory 84 is read out, the correction of that character is instructed, and this correction processing is completed.

Therefore, at this time, only one character at the current carriage position is erased.

Next, regarding this collection process, see Figures 11 to 1.
This will be explained in detail with reference to FIG.

First, as shown in Figure 11, there is a
Assuming that EFGHIJK LMNOPJ is printed, a character code is stored in the correction memory 84 as shown in FIG. Note that "rΔ" in FIG. 11 means a space, which is not actually printed. Also, the first
rS PJ in Figure 2 means a space code.

For example, if we consider the case where the character string rEFGHIJJ is to be deleted, the carriage movement key on the keyboard 1, whose explanation is omitted, is operated to move the carriage 35 to the position of the character rJJ (indicated by ↑). Thereby, the address pointer CA of the correction memory 84 moves to the position of the character rJJ.

Then, by pressing the word key 13 and the correction key 12, the characters rJJ at the current carriage position are erased as rI, H, G, F, and EJ, and the character "E" is erased.
Since there is a space before the character "E", the collection process ends when that character "E" is deleted.

As a result, the printing result becomes as shown in Figure 13,
At this time, the carriage 35 is positioned at the position of the erased character rEJ (indicated by ↑).

Further, in this case, if the collection end key 14 is pressed when the character rHJ is deleted, the characters rJ, I, and HJ are deleted and the collection is completed.

In this manner, this electronic typewriter has the function of erasing a character string including the character at the current carriage position, so that the character string can be automatically erased with a simple key operation.

In the above embodiment, an example was described in which the character string from the character at the current carriage position to the space is erased. ” The process for determining whether or not
The processing may be performed to determine whether the line break is a line break or the carry and end are on the left margin.

In this case, by providing a key for instructing the end of the collection as described above, the collection can be ended at any position and the entire necessary range can be erased, which is extremely effective.

Furthermore, it is also possible to erase not only the character strings before the current carriage position but also the character strings after the current carriage position.

Furthermore, the command to erase (collect) a character string may be issued by a dedicated single key, or by a combination of two or more keys as in the above embodiment.

However, increasing the number of keys actually complicates the operation, so in order to improve operability while preventing key operation errors, it is preferable to use a combination of two keys.

Furthermore, not only electronic typewriters but also receiver/
The present invention can also be implemented in only (R/○) printers.

As explained above, according to the present invention, the operability of the collection operation is improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an external perspective view showing an example of an electronic typewriter embodying the invention, and Figs. 3 and 4 similarly show the mechanism of the printer. A schematic plan view and a front view shown. 5, 6, and 7 are side views for explaining the ribbon lift mechanism mounted on the carriage, respectively. FIG. 8 is a block diagram showing the same <ETW control section, and FIG.
i! ! Similarly, FIG. 10 is a block diagram showing a printer control unit, and FIG. 10 is a flow diagram showing an example of a collection process executed by the ETW control unit. FIG. 11, FIG. 12, and FIG. 13 are explanatory diagrams providing a concrete explanation of the collection process. 1...Keyboard 2...Display 3...
・Printer 12...Collection key 13・
...Word key 35... Carriage 66... Collection tape Figure 1 Figure 2 Figure 5 Figure 8 Figure 1 Q Figure 11 Figure 12 A Figure 13 Procedure amendment (own ship November 1985) June 14th, Director General of the Patent Office, Michibe Uga 1, Indication of the case, Patent Application No. 143960/1982, Name of the invention, Electronic typewriter 3, Person making the amendment, Relationship to the case, Patent applicant, Nakamagome, Ota-ku, Tokyo. 1-3-6 (674) Ricoh Co., Ltd. -4, Agent 1-20-5 Higashiikebukuro, Toshima-ku, Tokyo (1) "Carriage" on page 6, line 20 of the specification. Amended to "carriage." (2) "Arm 64" on page 9, line 19 of the same book is corrected to "arm 74". (3) "Support shaft 6!1" on the same page of the same book is changed to "ff' support shaft 73". (4) Same book, page 10, lines 10-11 “Cassette holder 6
0" is corrected to "ribbon holder 60." (5) "Master microprocessor 61" on page 13, line 11 of the same book has been replaced with "mask microprocessor 91".
and correct it. (6) "First solenoid 61" on page 14, line 8 and line 12 of the same book, is corrected to "first solenoid 71." (7) "Second solenoid 62" in lines 8 to 9 on the same page of the same book is corrected to "second solenoid 72." (8) "Current address pointer" on page 16, lines 6-7 of the same book
is corrected as the "current address pointer". (9) "Collection" on page 18, line 7 of the same book, (10
) "Figure 2,""Figure4,""Figure7," and "Figure 9" of the drawings are corrected as shown in the corrected drawings attached to this document. 7. Attached documents: 1 copy of corrected drawings (Fig. 2, Fig. 4, Fig. 7, Fig. S) Fig. 2 Fig. 7

Claims (1)

[Claims] 1. In an electronic typewriter having a character erasing function,
An electronic typewriter characterized by being provided with character erasure control means for controlling erasure of a character string including the character at the current carriage position. 2. The electronic typewriter according to claim 1, wherein the character erasure control means includes means for controlling erasure of the character string from the character at the current carriage position to the space. 3. The electronic typewriter according to claim 1, wherein the character erasing control means includes means for continuing erasing the character string until an instruction is given to end character erasing.