Title:
REMOTE CONTROL DEVICE OF DOOR LOCK MECHANISM FOR VEHICLE
Document Type and Number:
Japanese Patent JP3213190
Kind Code:
B2
Abstract:
PURPOSE: To enhance convenience in use by preventing a synchronous difference in an ID code between the radio wave key side and the receiver side of an automobile in a rolling code system to the possible minimum level.
CONSTITUTION: In a radio wave key, when operation switches 4 and 5 are operated, electric power is supplied to respective parts of a transmission circuit 6 from a battery 16, and a shift register 18 outputs an ID code and a switch code, and transmits them from an antenna 27. At this time, a switch code discriminating circuit 21 renews and stores an increment code when a last time switch code is an unlocked code and this time switch code is a lock code. Since the increment code is similarly renewed with every reception even on the receiver side, the occurrence of a synchronous difference can be prevented better to the possible minimum level than when it is renewed every time.
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Inventors:
Yoshiyuki Mizuno
Sadao Kokubun
Hisashi Aoki
Takashi Mizuno
Shinichi Koga
Sadao Kokubun
Hisashi Aoki
Takashi Mizuno
Shinichi Koga
Application Number:
JP475195A
Publication Date:
October 02, 2001
Filing Date:
January 17, 1995
Export Citation:
Assignee:
Tokai Rika Electric Co., Ltd.
International Classes:
E05B49/00; (IPC1-7): E05B49/00
Domestic Patent References:
| JP481344A | ||||
| JP1250572A | ||||
| JP431581A |
Attorney, Agent or Firm:
Tsuyoshi Sato