Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1992-11-23
1995-03-21
Groody, James J.
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
341 22, 3403845, 36470912, H03M 1100
Patent
active
054000211
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an apparatus for controlling an operational panel on which keyboards or change over switches are arranged, and relates more particularly to an apparatus for controlling an operational panel that has a signaling function that indicates switching operations by a buzzer.
BACKGROUND ART
Recently, an apparatus for controlling an operational panel on which keyboards, rotary switches or other switches are arranged, is utilized for machine tools, etc., and has a signaling function using a buzzer when switching so as to provide an operator with audible feedback. This function is quite useful when operating switches having very little tactile feedback such as flat key switches. However, it can be irritating when operating switches that clearly provide sufficient tactile feedback, such as rotary switches, change over switches, etc. Therefore, in the prior art, it is previously determined whether the buzzer should be sounded for each switch or not.
In general, a matrix circuit is used for discriminating the ON/OFF state of each switch on an operational panel. The matrix circuit is arranged such that a switch is provided for each intersection of the matrix, and the ON/OFF state of each switch is discriminated by driving signals sent through each of the common lines.
The discrimination of whether the buzzer should be sounded or not when a switch is the ON state, is accomplished by providing 2 groups of common lines. Namely, intersections of the matrix for sounding the buzzer are located in a group No. 1 of common lines, while intersections of the matrix for not sounding the buzzer are located in a group No. 2 of common lines.
Thereby the apparatus for controlling an operational panel is controlled so as to sound the buzzer if any of the intersections are in the ON state when the No. 1 group of common lines is driven, and the apparatus is controlled so as not to sound the buzzer if any of the intersections are in the ON state when the No. 2 group of common lines is driven.
However in the prior art, there is a problem that the operational panel cannot be freely manufactured because the number of switches that sound the buzzer and the number of switches that do not sound the buzzer, have to be determined during the switch layout design stage of the operational panel.
DISCLOSURE OF THE INVENTION
Accordingly, it is an object of the present invention to provide an apparatus for controlling an operational panel comprised of a simple electric circuit, in the light of the above mentioned problem. A further object of the present invention is to provide an operational panel in which the switch layout on the operational panel, can be more freely determined.
According to the present invention, to solve the above described problems, an apparatus for controlling an operational panel on which keyboards or change over switches are arranged, is characterized in that it comprises, switches arranged at each intersection of a switch matrix, a driving circuit for transferring drive signals to common lines of the switch matrix, a receiving circuit for receiving switch input signals via data lines of the switch matrix, switch discriminating elements for transferring switch discriminating signals to the receiving circuit via switch discriminating data lines, the signals indicating whether the switches should sound a buzzer or not when receiving the driving signals arranged on each of the common lines, an ON/OFF state discriminating means for discriminating the ON/OFF state of the switches after reading the states of the driving signals and the switch input signals, a buzzer driving discriminating means for discriminating whether the buzzer should be sounded or not by reading the switch discriminating signals via the switch discriminating elements when any of the switches are determined to be in an ON state by the ON/OFF state discriminating means, a buzzer driving means for sounding the buzzer when the buzzer driving discriminating means determines that the buzzer should be sounded.
Each o
REFERENCES:
patent: 4249245 (1981-03-01), Nakanishi et al.
patent: 4728936 (1988-03-01), Guscott et al.
patent: 5070330 (1971-12-01), Wu
Burgess Glenton B.
Fanuc Ltd.
Groody James J.
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