Key structure with illumination function

Details Key structure with illumination function Key structure with illumination function

1997-04-02

1998-03-24

Gall, Lloyd A.

Locks

Operating mechanism

Key

70404, 70408, 70454, 362116, 362200, E05B 1902

Patent

active

057300135

ABSTRACT:
A key structure with illumination function including a grip housing composed of a first and a second casing, a key plate enclosed in the grip housing and having a key head extending out of the grip housing, a cell disposed beside the key plate and a light emitting diode having two terminals extending to two electrodes of the cell. By depressing a depression button, the terminals of the light emitting diode are electrically connected with the cell to form a closed circuit so that the light emitting diode can emit a light beam to illuminate the circumference of the key hole. Accordingly, in a dim place, a user can easily use the key to unlock the lock.

REFERENCES:
patent: 2208498 (1940-07-01), Cramer
patent: 4521833 (1985-06-01), Wolter
patent: 4562712 (1986-01-01), Wolter
patent: 5181927 (1993-01-01), Song
patent: 5307658 (1994-05-01), Kokubu et al.
patent: 5402660 (1995-04-01), Osada
patent: 5541817 (1996-07-01), Hung

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