JPS6471978A - Lock for electronic apparatus - Google Patents

Lock for electronic apparatus

Info

Publication number
JPS6471978A
JPS6471978A JP22831587A JP22831587A JPS6471978A JP S6471978 A JPS6471978 A JP S6471978A JP 22831587 A JP22831587 A JP 22831587A JP 22831587 A JP22831587 A JP 22831587A JP S6471978 A JPS6471978 A JP S6471978A
Authority
JP
Japan
Prior art keywords
light
key
receiving element
lock
affect
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
JP22831587A
Other languages
Japanese (ja)
Inventor
Mitsuo Yamada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP22831587A priority Critical patent/JPS6471978A/en
Publication of JPS6471978A publication Critical patent/JPS6471978A/en
Pending legal-status Critical Current

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  • Lock And Its Accessories (AREA)

Abstract

PURPOSE: To obtain a lock which does not affect a magnetic medium by placing a constant interval, arranging light-emitting elements and light-receiving elements correspondingly, providing a light passing hole and inserting a key to its gap and obtaining the key code information. CONSTITUTION: A light-emitting diode 3 is placed on one printed circuit board 2 of a cylinder 1 and, in response to this, a light-receiving element 5 is provided on a printed circuit board 2 at other side with a certain gap maintained from the element 3. Also, the distance between the light-emitting diode 3 and the light receiving element 5 is made constant, the key 20 is inserted along the guide groove of the cylinder 1, light is radiated to the light receiving element 5 from a hole 21 for passing the light provided in response to the light receiving element 5 of the key 20, thereby creating the code information of the key 20. In this way, an optical method is adopted in a mechanism for the code detection of the key 20, and a permanent magnet is deleted from the key 20 and thus the lock that does not affect the magnetic medium can be obtained for the electronic equipment.
JP22831587A 1987-09-14 1987-09-14 Lock for electronic apparatus Pending JPS6471978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22831587A JPS6471978A (en) 1987-09-14 1987-09-14 Lock for electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22831587A JPS6471978A (en) 1987-09-14 1987-09-14 Lock for electronic apparatus

Publications (1)

Publication Number Publication Date
JPS6471978A true JPS6471978A (en) 1989-03-16

Family

ID=16874516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22831587A Pending JPS6471978A (en) 1987-09-14 1987-09-14 Lock for electronic apparatus

Country Status (1)

Country Link
JP (1) JPS6471978A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240935A (en) * 1993-02-15 1994-08-30 Power Fuiirudo:Kk Optical selective key and key hole therefor
KR100423091B1 (en) * 2001-11-20 2004-03-16 기아자동차주식회사 A starting apparatus of vehicles
JP2012072600A (en) * 2010-09-29 2012-04-12 Nihon Kaiheiki Industry Co Ltd Key switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240935A (en) * 1993-02-15 1994-08-30 Power Fuiirudo:Kk Optical selective key and key hole therefor
KR100423091B1 (en) * 2001-11-20 2004-03-16 기아자동차주식회사 A starting apparatus of vehicles
JP2012072600A (en) * 2010-09-29 2012-04-12 Nihon Kaiheiki Industry Co Ltd Key switch

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