JPS58168135A - Keyboard device - Google Patents

Abstract

PURPOSE:To save switches for specific signals, by generating the specific signals while plural number of keyboards are depressed at the same time, after the plural keyboards among them for character input are depressed in the prescribed sequence. CONSTITUTION:A data key group 1 has keys of Katakana (square form of Japanese syllabary), numeral and English letter, and symbol, a key code generating circuit 2 generates a key code corresponding to the keys deprssed from the data key group 1, and the codes are given to a display 7 via an interface circuit 8. Either of a Kana shift key 3, a numeric shift key 4 and an English letter shift key is depressed to output Kanas, numerals or English letters. A forced reset switch signal generating circuit 9 generates a forced reset signal while the keys 5, 4 and 3 are depressed at the same time, after they are depressed in the prescribed sequence, and controls the interface circuit 8. Thus, the special signals such as the forced reset signal are generated without providing special switches.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is a book related to a keyboard device for inputting a single character or the like.

Hereinafter, a display terminal device will be explained as an example.

FIG. 1 is a block diagram showing a display terminal device used on a conventional keyboard device.

In the diagram (11 is katakana, numbers, alphabets, kana symbols,
A group of data keys such as English symbols, (21 is a group of data keys (11
A key code generation circuit that generates a code that indicates which key has been pressed, +31Fi-m Kana shift key that is pressed to change the data key to be pressed to Kana shift shape 11, (4) is the one that is currently being pressed. The numeric shift key is pressed to put the data key into the numeric shift state, (5; is the alphabetic shift key that is pressed to put the data key that is currently being pressed into the alphabetic shift state, and (6) - is when the circuit or program goes out of control. (7) is a display device that displays all characters, (8) is a display device (7) and key code generation circuit (21, kana shift key (3), numeric shift key (4)
1. This is an interface circuit that exchanges signals with the alphabetic shift key (5) and forced reset switch (6).

Now, if you want to input and display characters on the display device, press the corresponding key in the data key group (1) K, and the characters will be displayed on the display device.

At this time, even if multiple characters such as kana, numbers, and alphabets are engraved on the relevant key, the command from the display device will automatically shift the finger to the shift state, but if you want to change the designation and enter Press the shift key (or keep it pressed) and then press the multiple character engraving key.

In this way, when operating normally, there is no need for a forced reset switch, but if the circuit or program of one display device goes out of control, pressing the forced reset switch can reset the minimum required number of circuits or programs. required for normal operation.

However, since this switch must be pressed only when an abnormality occurs, it must be placed in a location that cannot be easily operated (for example, on the back of the keyboard device) to prevent WA operation, or in a location that is easily accessible ( For example, even when placed on the top surface of a keyboard device, a mechanism to prevent erroneous operation is installed.

Conventional keyboard devices are configured as described above, so if they are installed on the back side of the keyboard, they are difficult to operate. It had some drawbacks, such as an unsightly appearance. It also has the disadvantage of being expensive.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above. 1. A plurality of commonly used keys (in this example, three types, alphabetical shift key, numeric shift key, and kana shift key) are pressed in a certain order. It is an object of the present invention to provide a keyboard device that is configured to generate a specific signal (in this example, a forced reset switch signal) while the buttons are pressed simultaneously.

FIG. 2 is a block diagram showing a display terminal device according to an embodiment of the present invention. In FIG. 1, the same reference numerals as in FIG. 1 indicate the same or corresponding parts, and (9) is an alphabetical shift key and a numerical shift key.

This is a forced reset switch signal generation circuit that generates a forced reset switch signal while the Kana shift keys and Kana shift keys are pressed in a certain order and are kept pressed at the same time.

Fig. 3 is an example of a logical connection diagram of the forced reset switch signal generation circuit (9). In Fig. 9, a group of data key press signals - @ indicates an abnormal operation such as pressing this keyboard with both palms. This is to prevent the forced reset switch signal from being generated.

In this embodiment, the 0 forced reset switch signal is generated as follows.

When all the data keys are not pressed, the numeric shift key is not pressed, and the kana shift key is not pressed, press the alphabetic shift key and leave it as it is.

Next, press and hold the number shift key (now both the letter shift key and number shift key are pressed down).

Further, by pressing the kana shift key K, a forced reset switch signal is generated.

If the above pressing order is not correct, the 9 forced reset switch signal will be generated or not.

Incidentally, in the above embodiment, three kinds of alphabetical shift keys, numerical shift keys, and kana shift keys are used as means for generating special signals such as forced reset switch signals, but this can also be done using other keys. It is also possible to realize the number of keys other than three.

Further, in the above description, the case where the device is connected to a display device has been described, but it goes without saying that the device can also be used by connecting to a recording device such as a printing device.

As described above, according to the present invention, five special signals such as a forced reset switch signal can be generated without adding a special switch such as a forced reset switch, and the operation is easier than that of the conventional one. Becomes cheaper. Effects such as improved appearance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a display terminal device using a conventional keyboard device, FIG. 2 is a block diagram showing a display terminal device according to an embodiment of the present invention, and FIG.
The figure is a logical connection diagram showing an embodiment of the forced reset switch signal generation circuit (9). In the figure, (11 is a group of data keys, (2) is a key code generation circuit, (3) is a kana shift key, (4) is a numeric shift key, (5) is an alphabetic shift key, (7) is a display device, and (8) is an interface The face circuit (9) is the forced reset switch signal generation (b) path. In each figure, the symbols 1 and 1 indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1/ Figure 1 Figure 2

Claims (1)

[Claims] 1. A keyboard device for inputting characters, etc., comprising means for generating a specific signal while a plurality of keys are being pressed simultaneously after being pressed in a certain order.