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Patent Searching and Data


Title:
POWER-SUPPLY ALARM DEVICE OF KEYLESS SYSTEM FOR CAR
Document Type and Number:
Japanese Patent JPH09203251
Kind Code:
A
Abstract:

To obtain a power-supply alarm device capable of inhibiting the consumption of a transmitter battery by detecting battery voltage.

A transmitter 10 has a locking switch S1 and a release switch S2, and a locking or release operation code signal corresponding to operation containing an identification code is formed and transmitted from a control unit 1 by operating these switches. The feed voltage of a battery 2 conducting feed is detected by a voltage detector 3, and the locking or release operation code signal is transmitted alternately after the sending of a code signal by switch operation when the feed voltage is lower than a specific value. When a transmitted signal is received by a tuner 5 and the decision of the identification code coincides by an identification-code decision section 6, a control section 16 interprets an operation code from a received signal, a motor 7 is driven with the interpretation, and a door lock is locked and released. When the voltage of the battery 2 is low to one-time operation normally, a power-supply burden is not applied to the transmitter and a power-supply warning can be conducted by repeating locking and release.


Inventors:
MITSUMOTO YOSHIHIRO
Application Number:
JP3551796A
Publication Date:
August 05, 1997
Filing Date:
January 30, 1996
Export Citation:
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Assignee:
NISSAN MOTOR
International Classes:
E05B49/00; B60J5/00; B60R25/01; B60R25/24; B60R25/40; E05B83/16; E05B83/36; H01M10/48; (IPC1-7): E05B49/00; B60J5/00; B60R25/00; E05B65/19; E05B65/20; H01M10/48
Attorney, Agent or Firm:
Kimio Kikutani (3 outside)