JPS6436879A - Electronic key device - Google Patents

Electronic key device

Info

Publication number
JPS6436879A
JPS6436879A JP19169887A JP19169887A JPS6436879A JP S6436879 A JPS6436879 A JP S6436879A JP 19169887 A JP19169887 A JP 19169887A JP 19169887 A JP19169887 A JP 19169887A JP S6436879 A JPS6436879 A JP S6436879A
Authority
JP
Japan
Prior art keywords
key
code
circuit
coincide
preventing
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.)
Pending
Application number
JP19169887A
Other languages
Japanese (ja)
Inventor
Hiroshi Kobayashi
Shinji Suda
Katsunobu Hongo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP19169887A priority Critical patent/JPS6436879A/en
Publication of JPS6436879A publication Critical patent/JPS6436879A/en
Pending legal-status Critical Current

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  • Lock And Its Accessories (AREA)

Abstract

PURPOSE: To prevent a key from being broken easily by preventing a key opening/closing control circuit from being activated unless a certain amount of time passes in the case when a received code does not coincide with a preset code. CONSTITUTION: A data code from a data code-setting circuit 1 is coded by a transmission circuit 2, is modulated, is changed into a light signal by a light- emitting diode 3, and is transmitted. The transmitted light signal is received by a photo diode 4, is demodulated by a data-reading circuit 5, and is compared with a data code from a data code-setting circuit 6 by a comparison circuit 7. When both of them coincide with each other, a control circuit 8 releases a key 9. When both of them do not coincide with each other, a timer 10 starts counting, thus preventing the control circuit 8 from operating unless a certain amount of time passes, even if the key code coincides, namely preventing the key 9 from opening.
JP19169887A 1987-07-30 1987-07-30 Electronic key device Pending JPS6436879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19169887A JPS6436879A (en) 1987-07-30 1987-07-30 Electronic key device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19169887A JPS6436879A (en) 1987-07-30 1987-07-30 Electronic key device

Publications (1)

Publication Number Publication Date
JPS6436879A true JPS6436879A (en) 1989-02-07

Family

ID=16278987

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19169887A Pending JPS6436879A (en) 1987-07-30 1987-07-30 Electronic key device

Country Status (1)

Country Link
JP (1) JPS6436879A (en)

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