Title:
SET FOR PREVENTING THING FROM BEING LEFT BEHIND
Document Type and Number:
Japanese Patent JP3785502
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a set for preventing things from being left behind, which stops emission of a beep sound and gives an alarm by flickering of an alarm lamp or display on a display part when the distance between a reception device and a transmission device exceeds the beep sound emission range.
SOLUTION: A set 1 for preventing things from being left behind is constituted of a transmission device 2 which is attached to one or more personal effects and transmits a signal 4 and a reception device 3 which receives the signal 4 and calculates the distance to the transmission device 2 based on the signal level of the signal 4 and gives an alarm based on the distance. When the distance between the reception device 3 and the transmission device 2 reaches the beep sound emission range, the reception device 3 gives the alarm by emitting the beep sound. When the distance between the reception device 3 and the transmission device 2 exceeds the beep sound emission range, the beep sound is stopped and the alarm is continuously given by flickering of an alarm lamp 17, alarm display on a display part 15, or the like.
Inventors:
Mukai
Application Number:
JP2002298433A
Publication Date:
June 14, 2006
Filing Date:
October 11, 2002
Export Citation:
Assignee:
Mukai
International Classes:
G08B21/24; H04M1/00; H04M1/02; H04M1/21; H04M1/725; (IPC1-7): G08B21/24; H04M1/00; H04M1/02; H04M1/21; H04M1/725
Domestic Patent References:
| JP2000030164A | ||||
| JP2002140777A | ||||
| JP59003597A | ||||
| JP2000187787A | ||||
| JP2000124817A |
Attorney, Agent or Firm:
Mitsuhiko Watanabe