JPS61256424A - Keyboard containing error output preventing function for specific key - Google Patents

Abstract

PURPOSE:To enable a user to set optionally an error output key by setting an error output setting key to a key matrix and masking the key pushed after said setting key to inhibit the output of the code of the masked key. CONSTITUTION:An output setting key 4 is set previously to a key matrix 3. While a keyboard control part 1 scans the matrix 3 by a decoder 2. Another key of the matrix which is pushed after the key 4 is masked and the control is carried out no to deliver the code of the masked key to a host device (not shown here) via a keyboard interface 5. Thus a user can set optionally an error output preventing key.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a keyboard having a function of preventing erroneous operation of a specific key.

[Conventional technology]

Conventionally, in order to prevent erroneous operation of a specific key in this type of keyboard, it has been done either by operating a switch using an IE air circuit or by inserting a stopper to prevent the key switch from being pressed mechanically.

[Problem that the invention seeks to solve]

The above-described conventional keyboard having the function of preventing erroneous operation of a specific key has a disadvantage in that it is difficult for the user to arbitrarily specify a key to prevent erroneous output.

[Means for solving problems]

The keyboard with a specific key erroneous output prevention function of the present invention has a predetermined erroneous output setting key, masks the key in the IJ hook that is pressed after the erroneous output setting key, and outputs the code of that key. There are means to control this.

Therefore, the user can arbitrarily set the erroneous output prevention key.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a keyboard with a function to prevent erroneous output of specific keys according to the present invention. The output setting keys 4 are predetermined in a key matrix 8. The keyboard control unit 1 scans the key matrix 8 with the decoder 2, and when another key in the key matrix 8 is pressed following the output setting key 4, this key is masked and the code is sent to the keypad interface 7. The data is controlled not to be output to a host device (such as a personal computer) (not shown) via the Ace 5.

Note that even if this key (output prevention key) is pressed, the code will not be output until the same operation is performed again.

Note that a plurality of erroneous output setting keys 4 may be provided, and these keys may be pressed simultaneously or successively.・Also, the output prevention key can be set as a reward by repeating the above operation.

〔Effect of the invention〕

As explained above, the present invention sets an erroneous output setting key in the key matrix, masks keys that are pressed due to this erroneous output setting key, and prevents the code from being output. , the user can arbitrarily set the key to prevent accidental activation.

[Brief explanation of drawings]

1st v! J is a four-dimensional diagram of a keyboard with a function to prevent a specific key from being erroneously displayed according to the present invention. 1...Keyboard control section. 2. Axis decoder, 8. Key matrix. 4... Erroneous output setting key. Keyboard interface.

Claims (1)

[Claims] In a keyboard that uses a microcomputer to determine a pressed key, convert the code, and output the code, an erroneous output setting key is predetermined, and a key pressed following the erroneous output setting key is provided. A keyboard with a function to prevent erroneous output of a specific key, characterized by having a means for masking a key in a matrix and controlling so as not to output a code for that key.