JPS6354273A - Electronic typewriter - Google Patents

Abstract

PURPOSE:To achieve the improvement of the operating performance of an electric typewriter, by a method wherein the break of words is detected from data stored in a buffer memory, and a printing head is quickly and easily skipped over that detected break of words according to the operation of a skip command. CONSTITUTION:Data inputted from a keyboard together with the printing position of a character are stored in a buffer memory 4. A detection means 5 retrieves this buffer memory 4 and detects positions concerning the break of words. A skip control means successively transfers a carriage to the position concerning to the break of the word detected by a detection means everytime when a skip command is given from a skip command means 11 arranged on the keyboard. Since the printing head is thus positioned at the break of the word of a printed document by a simple operation, the word to be corrected can be quickly indexed.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an electronic typewriter capable of moving a printhead to word breaks in a printed document.

[Prior art]

Conventionally, the character erasing function of electronic typewriters includes manual erasing and automatic erasing. Manual erasing involves moving the print head to the printing position of the character you want to erase and pressing the corresponding character key to erase one character. This is a function that erases data one by one. On the other hand, in automatic erasing, a correction memory is provided to store a certain amount of printed character data, and after the print head is moved to a predetermined character position, the printed character data is collected while the correction key is operated. This function reads data sequentially from memory and erases printed characters continuously in one direction according to the data.

[Problems to be solved by the invention]

To use any of the above erase functions, it is necessary to carefully move the print head to the erase start position using the space key, backspace key, etc. Therefore, erasing characters requires time and attention, which poses a problem in the usability of the typewriter. Also, JP-A-60
Japanese Patent Publication No. 210482 describes a means for easily erasing any printed word, but in this means as well, in order to specify the word to be erased, the print head is pressed one by one using the space key, backspace key, etc. You need to move the characters one by one. Therefore, it is necessary to constantly monitor whether the print head has reached a desired character position in the specified word, and it requires considerable attention and time to position the print head at the desired position. And so.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems l' and '1, and its purpose is to quickly and easily locate positions related to word breaks in a printed document. The purpose is to improve the operability of electronic typewriters by moving the print head.

[Means to solve the problem]

As shown in FIG. 1, the configuration of the invention to solve the above problem is as follows: a keyboard having a large number of character keys and function keys; An electronic typewriter comprising a buffer memory for storing data input from a keyboard, and a control means for controlling the print head, carriage, etc. based on the data input from the keyboard, the controller being provided on the keyboard and controlling the carriage. a skip command means for instructing to skip left and right; a detection means for searching data stored in the buffer memory and detecting word breaks; skip control means for moving the carriage so as to cause the print head to skip to a position related to the word break detected by the means.

[Effect]

Data is input by operating keys provided on the keyboard, and the input data is printed on paper by driving the carriage, print head, etc. by the control means. Also,
The data input from the keyboard is stored in the buffer memory together with the print position of the characters printed on the paper as a result. Therefore, the characters and printing positions printed in the past are
You can easily find out by searching the buffer memory. The detection means searches this buffer memory to detect positions associated with word breaks. Word breaks can be determined by space data or period data, but the positions that can be specified as word breaks are not limited to one location. The skip control means sequentially moves the carriage to positions related to the word break detected by the detection means every time a skip command is given from the skip command means disposed on the keyboard. In this way, the print head can be easily positioned at word breaks in the printed document, so that the words to be corrected can be quickly identified.

【Example】

The present invention will be described below based on specific examples. FIG. 2 is an external view of an electronic typewriter according to an embodiment of the present invention. A key board 1 having a large number of keys is disposed at the front of a case 70 of this typewriter, and a type impact type printer 30 is disposed at the rear thereof. The mechanical parts of the printer 30 mainly include a paper feeding mechanism including a platen 31, a printing hammer 32, and a printing wheel 3.
3. It is composed of a printing mechanism including a printing ribbon cassette 34 and the like, and a carriage moving mechanism that moves a carriage 35 (not shown in FIG. 2) equipped with the printing mechanism in the printing line direction. Further, in the printer 30, the printing position on the paper is controlled by driving the paper feed mechanism and carriage movement mechanism in response to a signal from the control device C, which will be described later.
By driving the printing mechanism, printing is performed at that position. Keyboard 1 has many character keys a and many function keys b
As part of the function keys b, a left skip key 11a and a right skip key 11b, which constitute the skip command means 11, are provided. Further, a panel above the keyboard 1 is provided with a liquid crystal display 38 for displaying messages, input characters, and the like. The control means 2, the buffer memory 4, the detection means 5, and the skip control means 6 are included in a control device C mainly consisting of a computer system shown in FIG. It is arranged on a printed circuit board. A central processing unit (CPU) 20 constituting the control device C of the electronic typewriter is connected to the keyboard 1 via an input interface 23, and the input interface 23 outputs information from the keyboard 1 in response to key operations. It has a buffer register R into which a 1-byte key signal is input. A ROM 21, a RAM 22, and input/output interfaces 24, 25, and 26 are connected to the CPU 20 via an address bus, a data bus, and a control bus, respectively. A program memory 210 is formed in the ROM 21 and stores a control program for inputting data from the keyboard 1 and driving the printer 30 to print a document. The RAM 22 also includes an input data memory 220 that reads and stacks data each time the data is input to the buffer register R, and a collection memory 221 that corresponds to the buffer memory 4 and stores one line of output character data. A current position memo 222 for storing the current position of the print head is formed and is backed up by a battery. Input/output interface 24.25.
Drive devices 80, 82, and 84 are connected to 26, respectively, and each drive device includes an L for paper feeding.
F motor 81, CR motor 83 for moving the carriage
, a printing mechanism drive source 85 that performs impact of the printing printer 32, lifting and feeding of the printing ribbon, rotation of the printing wheel 330, etc. Note that the drive device 80 and the LF motor 81 are electrical means that constitute a part of the paper feeding mechanism, and the drive device 82 and the CR
The motor 83 is an electric means that constitutes a part of the carriage moving mechanism, and is connected to a drive device 84 and a printing mechanism drive source 85.
is an electrical means that forms part of the printing mechanism. Further, a print head is composed of a print hammer 32 and a type wheel 33. Next, the operation of the device of this embodiment will be explained. When a key on the keyboard 1 is pressed while the buffer register R in the input interface 23 is in an empty state, a code signal corresponding to each key is input to the buffer register R. When the input of the code signal is completed, the input interface 23 outputs a buffer full status signal, and the CPU 2
An interrupt signal is output for 0. When this interrupt signal is input to the CPU 20, a predetermined interrupt routine is activated, the contents of the buffer register R are read, the data is stacked in the input data memory 220 formed in the RAM 22, and this interrupt routine ends. do. Further, when the contents of the buffer register R are read, the buffer full status signal is reset, and the next key can be pressed from the keyboard 1. In this way, the keyed-in data is sequentially stacked in the input data memory 220 by interrupt processing. When the input data is character data, it is printed as document data, but the manner of processing up to printing differs depending on the function of the electronic typewriter. For example, in the normal direct mode in which the input data is printed one character at a time each time character data is input from the keyboard 1, the character data is read from the input data memory 220, and the character data is read out from the input data memory 220, , the printing mechanism drive source 85 and the like are driven to print, and then the images are stacked in the collection memory 221. When the left skip key 11a or the right skip key 11b is pressed with the data stacked in the collection memory 221 in this way, the CPU 20
Skip processing is executed as shown in the figure. First, in step SL (hereinafter simply referred to as SL; the same applies to other steps), the input data memory 22
One byte of data 2 is read from 0, and in the next step 82 it is determined whether the data corresponds to the right skip key or not. If it is right skip key data, the process advances to S3, and if it is not right skip key data, the process advances to S9. to move to. Then, in s9, it is determined whether or not the read data is left skip key data, and if it is left skip key data, the process advances to Sll, and if it is not left skip key data, the process proceeds to Sll. ), other key processing is performed in SIO and returns to Sl. 83 to S8 are steps for executing right skip processing, and parameter I is a variable indicating the current position of the print head (print hammer 32), and
2 is stored in the current position memory 222. It is also a variable that indicates the relative address within the collection memory 221 where the character data printed at the current position is stored. The parameter I is initially set to zero when the carriage 35 is positioned at the original position, and is updated to indicate the current position each time the print head is moved thereafter. In S3, it is determined based on the correction memory 221 and the current position memory 222 whether the parameters I and ■□ are equal. Here, ■+4AX is a value corresponding to the next position of the last character data stored in the collection memory 221. And I is I. When it becomes equal to AX, since there is no data stored in the collection memory 221 to the right of the current position indicated by ■, the CPU process returns to Sl in order to prevent the data from being skipped further to the right than that position. On the other hand, Iku1. In the case of AX, the determination result in S3 is NO, and in S4, the parameter I is incremented by 1 to update the current position of the print head, and in the next step 85, the print head is moved to the right by one character. Then, in S6, the character data printed at the current position of the print head is read from the collection memory 221, and in the next step 87, it is determined whether the data is a space code. If it is not a space code, the process returns to S3 and the above-described process of moving the print head by one sentence to the right is repeated. Furthermore, if it is determined to be a space code in s7, the process moves to S8, and it is determined whether or not the character data printed one position to the left of the current position of the print head is a space code, and if it is a space code, S
3, and the above process is repeated. And S8
If it is determined that the printed character one character to the left of the current position is not a space, return to Sl and press the right skip key once.11. The process when key b is pressed is completed. Then, when the right skip key 11b is pressed again, the same process is repeated. That is, the right skip key 11b
Each time the key is pressed once, the print head stops at a print position that satisfies the condition that characters are printed to the left of the space within a range that does not exceed the right limit position i I , A. will be done. For example, suppose that characters are printed on a sheet of paper as shown in FIG. 5(a), and the current position of the print head is at the position indicated by ■. In this state, when the right skip key 11b is pressed, the print head is positioned at a print position that satisfies the condition that characters are printed on the left side of the space, ie, at the position shown by ■. Furthermore, right skip key 11b
When the key is pressed, the print head 32 is positioned at the position indicated by ■. Such operations may be repeated up to the position indicated by I 14AX. Further, S11 to S516 are steps for executing the left skip process, and when the left skip key 11a is pressed, the S
9 becomes YES, and the parameters ■ and I are set based on the collection memory 221 and the current position memory 222 in sll. It is determined whether or not IN is equal. Here, I yrN is a value corresponding to the first character data stored in the collection memory 221. When ■ becomes equal to r8, there is no data stored in the collection memory 221 to the left of the current position indicated by ■, so in order to prevent the data from being skipped further to the left than that position, the CPU process is , return to Sl. On the other hand, when I>ININ, the judgment result of SLl is NO, and in order to update the current position of the print head in 312, the parameter I is subtracted by 1, and in the next step 313, the print head is moved to the left by one character. will be moved. After that, 314
In steps 316 to 316, a print position that meets the same conditions as in the right skip process described above is searched for, and the print head is moved leftward until its current position reaches that print position, and then stopped at that position. Then, the CPU processing is S
It will return to l. Furthermore, when the left skip key 11a is pressed again, the same process is repeated. That is, the left skip key 118 is set to 1.
Each time the key is pressed, the print head is stopped at a print position that meets the condition that characters are printed on the left side of the space within a range that does not exceed the left limit position I14□9. Become. For example, as shown in FIG. 5(b), characters are printed on paper, and the current position of the print head is
Assume that it is in the position shown in ■. In this state, each time the left skip key 11a is pressed, the print head is
+++, and are sequentially positioned at the positions shown in 4. Further, the right skip key 11b and the left skip key 11a can be used in combination, and the print head can be positioned at a desired word break. After positioning, the word existing on the left or right side can be erased and corrected by activating the character erasing function provided in the electronic typewriter. In the above example, the position related to the word break is
I have selected a printing position that satisfies the condition that the characters are printed on the left side of the space, but the ■ in Figure 5 (c)
You may select the printing positions shown in ~■. Further, the buffer memory 4 is a collection memory 221 that stores one line of printed characters, but the number of stored print data may be several lines or one page.

【Effect of the invention】

As described above, the present invention is an electronic typewriter having a function of storing a predetermined amount of print data, which detects a word break from data stored in a buffer memory, and in response to the operation of a skip command means. The present invention is characterized in that the print head is caused to skip to a position related to the detected word break. Therefore, the print head can be stopped at a word break in a printed document with a simple operation, and the print head can be positioned at a desired position for printing at high speed. Therefore, the printed words can be corrected quickly and easily, thereby improving the operability of the electronic typewriter.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the concept of the present invention.
Fig. 2 is a perspective view showing the external appearance of an electronic typewriter according to a specific embodiment of the present invention, Fig. 3 is a block diagram showing the electrical configuration of the typewriter, and Fig. 4 is the same type. FIG. 5 is a flowchart showing the processing procedure of the CPU used in the writer, and is an explanatory diagram showing the stop position of the print head. l...Keyboard 1la-Left skip key 11b...
・Right skip key aP character key b-Function key 30-Printer 31-Platen 32...Print head 33'' Print wheel 34...-Print ribbon cassette 38.1 LCD display 70゛...Case Patent applicant Brother Kogyo Co., Ltd. Agent Patent Attorney Osamu Fujitani Figure 5 ■■ ■□ I MA! (b) EFG-uUABCL, uDEFuuGHIL
Iu↑ ↑ ↑ ↑ I□ □■ ■■ (c) ABCL, L, LIDEFLILJGHI↑↑
↑↑↑ (3) Close

Claims (1)

[Scope of Claims] A keyboard having a large number of character keys and function keys; a carriage on which a print head is mounted and moves back and forth in the row direction; a buffer memory that stores data input from the keyboard; and the keyboard. a control means for controlling the print head, carriage, etc. based on data input from the electronic typewriter, a skip command means provided on the keyboard for instructing the carriage to skip left and right; Search the data stored in the buffer memory,
a detection means for detecting a word break; and a skip for moving the carriage in response to an operation of the skip command means so as to cause the print head to skip to a position related to the word break detected by the detection means. An electronic typewriter characterized by comprising a control means.