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United States Patent | 5,722,274 |
Nakauchi ,   et al. | March 3, 1998 |
A lock cylinder set to a lock has an outer cylinder serving as a housing. In the outer cylinder, a first inner cylinder into which an electronic key is inserted and a second inner cylinder connected to a locking/unlocking mechanism of the lock are rotatably set. A connecting pin is movably held by the first inner cylinder to connect the first inner cylinder with the second inner cylinder when the pin advances. A connecting pin control mechanism advances the connecting pin to mechanically hold the advance state of the pin when a proper key is inserted and retreats the connecting pin when the key is extracted. The connecting pin control mechanism has a cam plate contacting the protrusion of the connecting pin. The connecting pin retreats when the cam plate tilts and advances when the cam member rises.
Inventors: | Nakauchi; Shunsaku (Mitaka, JP); Maeda; Syuji (Fussa, JP) |
Assignee: | Kokusai Gijutsu Kaihatsu Kabushiki Kaisha (JP) |
Appl. No.: | 682539 |
Filed: | July 25, 1996 |
PCT Filed: | December 6, 1995 |
PCT NO: | PCT/JP95/02499 |
371 Date: | July 25, 1996 |
102(e) Date: | July 25, 1996 |
PCT PUB.NO.: | WO96/18014 |
PCT PUB. Date: | June 13, 1996 |
Dec 06, 1994[JP] | 6-329858 |
Intern'l Class: | E05B 047/00; E05B 009/10; E05B 017/04; 467 |
Field of Search: | 70/276,277,278,379 R,379 A,380,279,375,422,472,188,189,218-223,454,393,395,139 |
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