JPS6290277A - Typewriter - Google Patents

Abstract

PURPOSE:To enable operation while the printing of an underline work is confirmed and to make it possible to increase a speed, by constituting the titled typewriter so that a printing mode with an underline, wherein the printing of an underline work is performed for each one character printing operation, is set and only the escape of a carriage is performed without printing an underline to a space part. CONSTITUTION:A keyboard part 10, an electronic control circuit 20 and drive circuits 31-36 are mounted. When a character/symbol key 11 is operated in such a state that an indication key 14 with an underline and an erasing key 15 are not previously operated, printing operation is performed after the escape operation of one character. In a printing mode with an underline after the indication key 14 with the underline was operated, the printing of the under line, the printing of the character/symbol and the escape operation of one character succeeding thereto are respectively performed for each printing position of one character in response to the operation of all of character/symbol keys 11 operated before a space bar 13 or a function key 12 is operated. Further, printing with the underline on a word basis is performed most simply.

Description

[Detailed description of the invention] The present invention relates to a typewriter.

Conventionally, in order to underline printed characters on general manual or electric typewriters, there are two methods: - backspace every time a character is printed and then use the underline key as a symbol key, and after printing a series of characters, the carriage One possible method is to return to the underlined starting position and then press the underline key repeatedly to add underlines all at once, but these methods have poor operability, and especially when adding all underlines at once, it is possible to make a mistake in the underline position. Underlined printing was not welcomed by operators.

High-end electronic typewriters equipped with word processors can automatically print underlines at each printing position without having to operate the underline key. Due to the nature of high-speed printing operations, before printing a series of characters that require underlining, the underlining instruction key is used to set the underlining start position, and then the space bar is operated. The underline completion position is only designated by the operation, and the underline start position and β end position are respectively recorded in the control circuit without underline printing during the character printing operation. The printer is configured to print underlines all at once during the carriage return operation that has been completed.Therefore, in most cases, a display device is used to inform the operator whether or not the printed characters are underlined during printing. Therefore, it is difficult to use it in an inexpensive typewriter that does not require a display device.

Additionally, when underlining printed characters, it is common to also underline the spaces between words, but it is better to underline only the words you want to emphasize in a sentence. There is a demand for underlining only predetermined words because it is easier to understand the gist of a sentence break and the printing speed is faster than when underlining is printed in spaces.

In response to such a request, conventional methods require extremely complicated operations.

In such a situation, the present invention does not require complicated operations like conventional manual or electric typewriters, and also does not require a display device like high-end models.
Furthermore, it is an object of the present invention to provide an inexpensive typewriter with good operability that allows only predetermined words to be underlined by a simple operation. Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of an electronic typewriter according to the present invention, in which a keyboard section 10 has a large number of character, symbol keys 119, function keys 12, and spacer keys 13.
．． An underline instruction key 14 for instructing the start position of underlined printing and an erasing key 15 for erasing, which will be described later, are provided, and the operation of each of these keys is controlled by an electronic control circuit 20.
is detected electrically by The electronic control circuit 20 is mainly composed of a microprocessor and a storage device (ROM, RAM), and the control section of this type of electronic typewriter has already been constructed with a similar configuration or has been commercially available for several years. , so a detailed internal explanation will be omitted here.

Drive circuits 31 to 36 controlled by electronic control circuit 20
Briefly, the type drive circuit 31 includes a pulse motor 41 that drives a petal-shaped type wheel (not shown) having type portions corresponding to a large number of characters and symbols including underlined symbols.
An excitation signal for rotationally driving the pulse motor 41 is input from an electronic control circuit, and specifically, it is a transistor circuit for exciting the windings of each phase of the pulse motor 41. The carriage drive circuit 32 generates a pulse signal corresponding to the steps required to drive a pulse motor 42 for moving a type wheel, a carriage (not shown) equipped with a pulse motor 41, etc., forward and backward along a printing line. It is input from the electronic control circuit 20. Hammer drive circuit 33
A trigger signal from the electronic control circuit 20 drives a printing hammer 43 constituted by an electromagnetic solenoid to strike the type on the type wheel held at the printing position. The ink ribbon drive circuit 34 is connected to the printing hammer 43.
A pulse motor 44, which is used to move a carbon ribbon (not shown) to a printing position with the printing operation, is rotationally driven by an output pulse signal from the electronic control circuit 20. The paper feed drive circuit 35 receives an output pulse signal from the electronic control circuit 20 to rotationally drive a pulse motor 45 that drives a print paper (not shown) in a direction perpendicular to the print line. The erasing ribbon drive circuit 36 operates an erasing ribbon (not shown) made of a known adhesive tape for erasing characters printed on the printing paper using the carbon ribbon by operating the erasing key 15 mentioned above. An excitation signal is input from the electronic control circuit 20 in order to excite the solenoid 46 which is moved to the printing position in relation to the printing position.

Various control operations of the electronic control circuit 20 in the electronic typewriter configured as described above will be explained with reference to the flowchart shown in FIG. In the following explanation, symbols in parentheses are for comparison with FIG. 2.

First, key operations on the keyboard 10 are detected (KY?→YE).
S> Then, the electronic control circuit 20 determines whether the next operated key is the character symbol key 11 (CHK?), the space par 13 (SPK?), or the function key 12 (FC
K? ), the erase key 15 (CRK?), or the underlined instruction key 14 (uLK?). Depending on the detected key, the following operation is performed.

Operation of the underlined instruction key 14 is detected (ULK?→Y
ES), the electronic control circuit 20 sets a register (not shown) for instructing underlined printing (ULRset)L, sets the underlined printing mode, and proceeds to the next key operation detection operation.

Operation of the erase key 15 is detected (CRK?→YES)
Then, the electronic control circuit 20 sets (CRRset) a register (not shown) for instructing erasing operation, and energizes the erasing ribbon drive circuit 36 (36F i) to move the erasing ribbon to the printing position. re) L, proceed to the next key operation detection operation.

Operation of function key 12 is detected (FCK?-YES)
Then, the electronic control circuit 20 outputs a pulse signal (PLSout) to the carriage drive circuit 32 or paper feed drive circuit 35 described above in order to execute predetermined functional operations such as carriage soturn, line feed, tab operation, etc. Reset both registers for underline printing instruction and erase operation instruction (LJLRreset, CRRr).
eset) and proceed to the next key operation detection operation. Operation of Space Par 13 is detected (SPK?→YES
), the electronic control circuit 20 outputs a pulse signal (CPOl, Jt) to the carriage drive circuit 32 in order to escape the carriage by one character, and resets both registers for underlining printing instruction and erasing operation instruction. , proceed to the next key operation detection operation.

At this time, even if the carriage is set to the underline printing mode, the underline is not printed, and only - characters are escaped.

Operation of character/symbol key 11 is detected (CHK?→Y
ES), the electronic control circuit 20 first determines whether or not a register for instructing erasing operation is set (CRR?), and if it is not set (NO), the carriage drive circuit 32 registers one character's worth of data. Perform escape operation (CP
out), then it is determined whether or not a register for underlining printing instruction is set (ULR?), and if it is set (YES), the character drive circuit 31. Controls the hammer drive circuit 33 and ink ribbon drive circuit 34 to print underlines (UL print) and characters and symbols (CHprint).If not set (No>, only characters and symbols are printed, and then Proceed to detect the key operation.If the register for erasing instruction is set (CRR?→YES), then it is determined whether the register for underlining printing instruction is set (
ULR? )L,, If set (YES), after printing the underline symbol (UL I)rint),
If it is not set (No>, the specified character will be displayed immediately,
The symbol is printed, and the carriage drive circuit 32 is controlled to backspace one character (B, KSP>), and then the erasing register is reset and the erasing ribbon drive circuit 36 is deenergized (CRRreSet).
L/, proceed to the next key operation detection operation.

Note that if it is not determined which key has been operated, the key operation detection operation is performed again.

To summarize the operation of the electronic typewriter as described above, if the character/symbol key 11 is operated without the underlined instruction key 14 or erase key 15 being operated first, an escape operation for one character is performed. After that, the printing operation is executed,
In the underline print mode after the underline instruction key 14 is operated, all characters operated until the space bar 13 or function key 12 is operated, and one character's worth of characters are displayed in response to the operation of the symbol key 11. Underline printing and characters for each printing position,
Symbol printing and subsequent escape operations for one character are executed, and for characters after the erasing key 15h1 is operated, the underline is erased at the same printing position if the symbol key 12 is operated in the underline printing mode. After the operation and character/symbol erasing operation is performed - if the character valve pack space operation is performed and the underline printing mode is not in effect, only one character or symbol is erased. It should be noted that with this electronic typewriter, underlined printing of word units is most easily executed.

As described above, in the typewriter according to the present invention, the underlined printing mode is set in which an underlined symbol is printed every time a character is printed by operating the underlined instruction key, and when the underlined printing mode is set, the underlined symbol is printed. It is constructed so that only the carriage can be escaped without printing an underline in the space by operating the bar. Therefore, operations can be performed without checking the printing of the underlined symbol, and the entire structure can be constructed at low cost without the need for an expensive display device, especially with a microprocessor and RAM.

In an electronic control circuit mainly composed of ROM, such addition of functions does not cause any cost increase. Also, when setting the underline printing mode, if you operate the space bar, you can underline only the specified words you want to emphasize without printing an underline in the space, creating sentences that make it easier to understand the main points. Furthermore, the printing speed can be increased by not printing an underline in the space.

[Brief explanation of drawings]

Figure 1 shows a typewriter for printing underlined characters according to the present invention.
FIG. 2 is an electronic block diagram showing a schematic configuration of the electronic control circuit, and FIG. 2 is a flow chart diagram for explaining the operation of the electronic control circuit. In the figure, 10 is a keyboard, and 20 is an electronic control circuit.

Claims (1)

[Scope of Claims] A keyboard having a large number of characters, symbol keys, an underlined instruction key, and a space bar; a printing element driving means for driving a printing element having printed characters corresponding to the characters and symbols; and the printing element. a carriage drive means for driving a carriage mounted with a typewriter; and a typewriter configured such that an underlined printing mode is executed by operating the underlined instruction key, when the underlined printing mode is selected, the typewriter is operated. a discriminating means for discriminating whether the key identified by the discriminating means is a character, symbol key, or a space bar; and if the key determined by the discriminating means is a character or symbol key, the printing control means for controlling the printing element driving means to print; and controlling the carriage driving means to cause the carriage to escape without printing an underline when the key determined by the determination means is a space bar. A typewriter characterized in that it is provided with a carriage drive control means for controlling the carriage drive.