JPS599311Y2 - Keyboard erroneous operation prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing erroneous operation of function keys on a keyboard of a terminal device of an information processing device, such as a display device.

In addition to character keys such as alphanumeric characters, kana characters, and even kanji characters (keys for inputting data), the keyboard has function keys for instructing the operation of the device.
It is normal to have

Erroneous operations on data keys can be easily corrected, and on devices equipped with a display screen, the operation results can be displayed and confirmed, making it easy to discover erroneous operations.

However, when it comes to function keys, the types of failures that occur as a result of erroneous operation vary depending on the software structure. , or may damage important user files or cause unexpected accidents.

For example, you can change the content that is keyed in using the data key and displayed on the display by pressing the C key using the function key.
Such accidents occur when sending data to a PU and interacting with a computer.

In order to prevent such accidents, conventional measures have been taken, such as covering the function keys with protective covers or inserting rubber plates into the gaps between the key tops to prevent keys from being pressed. However, these parts have some inconveniences, such as custom-made parts to fit each keyboard, and computer engineers having to do tedious work by opening the keyboard cover to install the parts. increased.

Therefore, the purpose of the present invention is to eliminate such conventional problems.According to the present invention, the operator can simply operate a pre-installed setting switch, and electrical countermeasures against erroneous operation can be taken. Even if a function key is operated incorrectly, there is no risk of any problems occurring.

Next, details of the device of the present invention will be explained based on illustrated embodiments.

Figure 1 is a perspective view of keyboard B, with character key unit C and function key unit F on the operation panel surface.
and a setting switch unit S are provided.

Each switch S1, S2 in the setting switch unit S...
・Each key f1 in the function key unit F,
f2 . . . are provided corresponding to every l pieces.

Of course, among function key units, if there is no need to provide a protection function, there is no need to provide a corresponding setting switch.

FIG. 2 is an enlarged plan view of the setting switch S.
For example, if the functions "r f1 to f1 are program function keys, the setting switches 51 to S1
.

PF1...PF1 are also given corresponding indications.

If a lever switch is used as the setting switch, for example, when the lever is moved to the upper "ON" position,
The function key corresponding to the switch is set to prevent misoperation, and when you move it to the "OFF" position,
The settings will be canceled.

FIG. 3 is a block diagram showing the circuit structure of the device of the present invention, in which only three function key switches f1' to f3' are illustrated as representatives.

Each of the function key switches f1' to f3' is connected to a keyboard encoder circuit E via a keyboard matrix circuit M, and the function keys f1, f
2... is encoded and outputted by the keyboard encoder circuit E, which is the same as in the conventional case.

However, in the case of the present invention, the setting switches S1, S2, . . . are inserted and connected between each of the function key switches f1', f2', .

And these setting switches S1, S2... are "ON"
The switch opens when you push it to the side, and closes when you push it to the "OFF" side. Therefore, the setting switch S
1, S2... are set to "OFF", the corresponding function key switches f1', f2'...
is connected to the keyboard matrix circuit M, but “ON”
”, the function key switches f1', f2', etc. are disconnected from the keyboard matrix circuit M by the setting switches s1, s2, etc., and even if a function key is operated, the signal is not sent to the keyboard matrix circuit M side. No output.

The setting switches S1, S2, etc. provided corresponding to the function keys f1, f2, etc. in Fig. 1 all have such a circuit structure, so the function keys that need to be protected from erroneous operation are By setting the corresponding setting switch to the "ON" side and setting erroneous operation prevention, it is possible to prevent failures due to erroneous operation.

In addition, conventional methods for preventing erroneous operation were to lock the mechanical movement of the function keys, so if the lock was incomplete, the function keys could be operated and there was a risk of erroneous operation. In this case, it is electrically completely separated from the keyboard matrix circuit, so
Even if the function keys operate mechanically,
Since no electrical output is generated, the method is much more reliable and secure in preventing erroneous operation than conventional mechanical erroneous operation prevention methods.

Regarding operability, when it became necessary to equip or remove a function key to prevent erroneous operation due to program changes, etc., conventionally, maintenance personnel removed the keyboard force bar each time and performed the work. However, with the present invention, the operator can easily set or cancel the erroneous operation prevention simply by operating the desired setting switch.

The degree of necessity for settings to prevent erroneous operation for each function key varies depending on the skill level of the operator, but in the case of an inexperienced operator, even if the function key is used frequently, the setting switch should be turned on and the In such cases, you can set the setting switches on only the minimum number of function keys necessary, and release the setting switches on frequently used keys to prioritize key operation efficiency. , convenient.

Furthermore, since only the setting switches are grouped together and placed in a separate location from the function key unit, there is no risk of both the function keys and the corresponding setting switches being operated incorrectly, making this an extremely reliable keyboard. is obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a keyboard equipped with an erroneous operation prevention device according to the present invention, FIG. 2 is an enlarged plan view of a setting switch unit thereof, and FIG. 3 is a diagram showing the circuit structure of the device according to the present invention. In the figure, C is a character key unit, F is a function key unit, S is a setting switch unit, f1, f
2... are function keys, f1', f2'...
are function key switches, and s,, s2, . . . are setting switches.

Claims (1)

[Scope of utility model registration request] In the function keys of the keyboard, a setting switch is provided between each key switch and the keyboard matrix circuit, and by operating the setting switch corresponding to each key switch, the key switch and the keyboard can be set. A device for preventing erroneous operation of a keyboard, characterized in that a matrix circuit is configured to be disconnected.