JPH0267824A - Key input device - Google Patents

Abstract

PURPOSE:To improve the work efficiency by depressing a shift key to set the shift state and depressing and releasing a key other than the shift key to release the shift state. CONSTITUTION:When a shift key 1 is depressed, a flip flop 3 is set; and when a key 2 other than the shift key is depressed, the depression signal of this key 2 and the output signal of the flip flop 3 are inputted to a key input part 5 and the key code signal of the shift state is sent. When the key 2 other than the shift key is released, a key release detecting part 4 detects that the key is released, and the flip flop 3 is cleared; and when the key 2 other than the shift key is depressed next, the key code signal of the non-shift state is sent. Consequently, simultaneous depression of keys is unnecessary, and keys are easily inputted with a single hand. Thus, a key input device of high work efficiency is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a key input device, and particularly to a method for setting and canceling a shift state.

[Conventional technology]

Conventionally, key input devices have been designed to allow input of many characters, numbers, symbols, etc. with a small number of keys.In order to input a large number of characters, numbers, symbols, etc. using a small number of keys, key input devices have two functions: one when pressing a single key as shown in Figure 2, and the other when pressing a shift key 1 and a key 2 other than shift. If you press both at the same time, you can enter different letters, numbers, and symbols.

In addition, as shown in Fig. 3, another key input device sets F/F 3' when the shift key 1 is pressed, and then presses the shift key 1 to clear F/F 3' and release the shift state. , so that key input can be performed while in the shift state.

[Problem to be solved by the invention]

With the conventional key input device described above, if you are operating a mouse or other device with one hand, you must input keys with one hand, so if the shift key and other keys are far apart, you may have to press both keys at the same time with one hand. I can't. Therefore, it is necessary to release the mouse and perform key input, which has the disadvantage of reducing work efficiency. In addition, in the case of a key input device that sets and cancels the shift state by pressing the shift key, the shift key must be pressed each time the shift state is set and canceled, which also has the disadvantage of reducing work efficiency. .

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide a key input device with good work efficiency that allows key input to be performed easily even with one hand.

[Means to solve the problem]

The key input device of the present invention includes means for setting a flip-flop by pressing a shift key, means for clearing the flip-flop by pressing and releasing a key other than the shift key, and an output of the flip-flop. and means for converting a press signal of a key other than the shift key into a key code signal.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.
is a shift key, 2 is a key other than shift, and 3 is a flip-flop configured to be set by pressing the shift key, and cleared via the key release detection unit 4 by pressing and releasing a key other than shift. 5 is a key input section which converts the output signal of the flip-flop 3 and the press signals of keys other than shift 1 into key code signals.

First, when shift key 1 is pressed, flip-flop 3 is set. Next, when a key 2 other than shift is pressed, the press signal of this key and the output signal of the flip-flop 3 are input to the key input section 5, and a key code signal of the shift state is sent out.

When the key 2 other than shift is released, the key release detection section 4 detects that the key has been released, and the flip-flop 3
is cleared, and the next time key 2 other than shift is pressed, a key code signal that is not in the shift state is sent out.

Therefore, it is no longer necessary to press the keys at the same time, and key input can be easily performed with one hand.

〔Effect of the invention〕

As explained above, in the present invention, the shift state is set by pressing the shift key, and the shift state can be canceled by pressing and releasing a key other than the shift key, thereby requiring key input with one hand. It is possible to configure a key input device that allows easy key input even when the machine is in use, and has good work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIGS. 2 and 3 are block diagrams showing a conventional key input device. 1... Shift key 2... Keys other than shift 3°3'... Flip-flop, 4... Key release detection section, 5... Key input section.

Claims (1)

[Claims] means for setting a flip-flop by pressing a shift key; means for clearing the flip-flop by pressing and releasing a key other than the shift key; and means for clearing the flip-flop by pressing and releasing a key other than the shift key; A key input device comprising means for converting into a key code signal.