JPS5567828A - Keyboard input device - Google Patents

Keyboard input device

Info

Publication number
JPS5567828A
JPS5567828A JP14177078A JP14177078A JPS5567828A JP S5567828 A JPS5567828 A JP S5567828A JP 14177078 A JP14177078 A JP 14177078A JP 14177078 A JP14177078 A JP 14177078A JP S5567828 A JPS5567828 A JP S5567828A
Authority
JP
Japan
Prior art keywords
key
scanner
key switch
contents
chattering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14177078A
Other languages
Japanese (ja)
Other versions
JPS584367B2 (en
Inventor
Noriiku Makino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP53141770A priority Critical patent/JPS584367B2/en
Publication of JPS5567828A publication Critical patent/JPS5567828A/en
Publication of JPS584367B2 publication Critical patent/JPS584367B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To avoid the malfunction signal caused by the effect of the chattering and the external noise by delivering the operation signal corresponding to the key switch in case the operation is detected continuously for an optional key switch.
CONSTITUTION: A number of key switches are arrayed on keyboard 1, and scanner 2 detects sequentially the operation of these key switches in a time-division way. Memory circuit 3 memorizes the detection contents of one circulation to all key switches in response to the detection action of scanner 2. Then a comoarison is given between the contents of circuit 3 and the detection contents given from scanner 2, and the operation signal corresponding to the key switch is delivered 5 in case the operation of an optional key is detected over twice of the scanning. Thus the occurrence can be avoided for the malfunction signal due to the effect of the chattering and the external noise.
COPYRIGHT: (C)1980,JPO&Japio
JP53141770A 1978-11-16 1978-11-16 keyboard input device Expired JPS584367B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53141770A JPS584367B2 (en) 1978-11-16 1978-11-16 keyboard input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53141770A JPS584367B2 (en) 1978-11-16 1978-11-16 keyboard input device

Publications (2)

Publication Number Publication Date
JPS5567828A true JPS5567828A (en) 1980-05-22
JPS584367B2 JPS584367B2 (en) 1983-01-26

Family

ID=15299761

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53141770A Expired JPS584367B2 (en) 1978-11-16 1978-11-16 keyboard input device

Country Status (1)

Country Link
JP (1) JPS584367B2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5776626A (en) * 1980-10-31 1982-05-13 Canon Inc Key input equipment
JPS5793356A (en) * 1980-12-02 1982-06-10 Ricoh Co Ltd Data read method of device controlled by microcomputer
JPS5797140A (en) * 1980-12-10 1982-06-16 Hitachi Ltd Key input controller
JPS57161921A (en) * 1981-03-31 1982-10-05 Fuji Electric Co Ltd Signal processing system
JPS5860340A (en) * 1981-10-06 1983-04-09 Brother Ind Ltd Keyboard controlling device
JPS5896335A (en) * 1981-12-01 1983-06-08 Alps Electric Co Ltd Scanning method of keyboard device
JPS6010325A (en) * 1983-06-30 1985-01-19 Fujitsu Ltd Key scanning system
JPS61259322A (en) * 1985-05-13 1986-11-17 Nec Corp Key scanning system
JPS62154125A (en) * 1985-12-27 1987-07-09 Toshiba Corp Keyboard device
JPS62138235U (en) * 1986-02-21 1987-08-31

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0347830Y2 (en) * 1986-09-17 1991-10-11

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017929A (en) * 1973-06-18 1975-02-25
JPS5224436A (en) * 1975-08-19 1977-02-23 Sharp Corp Key input unit
JPS5251828A (en) * 1975-10-23 1977-04-26 Omron Tateisi Electronics Co Key input discriminating unit
JPS5253629A (en) * 1975-10-24 1977-04-30 Tektronix Inc Keyboard device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017929A (en) * 1973-06-18 1975-02-25
JPS5224436A (en) * 1975-08-19 1977-02-23 Sharp Corp Key input unit
JPS5251828A (en) * 1975-10-23 1977-04-26 Omron Tateisi Electronics Co Key input discriminating unit
JPS5253629A (en) * 1975-10-24 1977-04-30 Tektronix Inc Keyboard device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5776626A (en) * 1980-10-31 1982-05-13 Canon Inc Key input equipment
JPS5793356A (en) * 1980-12-02 1982-06-10 Ricoh Co Ltd Data read method of device controlled by microcomputer
JPS5797140A (en) * 1980-12-10 1982-06-16 Hitachi Ltd Key input controller
JPS57161921A (en) * 1981-03-31 1982-10-05 Fuji Electric Co Ltd Signal processing system
JPS5860340A (en) * 1981-10-06 1983-04-09 Brother Ind Ltd Keyboard controlling device
JPS5896335A (en) * 1981-12-01 1983-06-08 Alps Electric Co Ltd Scanning method of keyboard device
JPS6010325A (en) * 1983-06-30 1985-01-19 Fujitsu Ltd Key scanning system
JPS61259322A (en) * 1985-05-13 1986-11-17 Nec Corp Key scanning system
JPS62154125A (en) * 1985-12-27 1987-07-09 Toshiba Corp Keyboard device
JPS62138235U (en) * 1986-02-21 1987-08-31

Also Published As

Publication number Publication date
JPS584367B2 (en) 1983-01-26

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