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Patent Searching and Data


Title:
MICROCOMPUTER INPUT SWITCH
Document Type and Number:
WIPO Patent Application WO/2018/220894
Kind Code:
A1
Abstract:
This microcomputer input switch exhibits little contact point electrical corrosion even when exposed to water and can detect an OFF state of a switch with certainty. The microcomputer input switch has a one-side contact point (6) and another-side contact point (7) that constitute a switch (5), wherein a constant current output with a pulsed waveform is applied to the switch (5) as a current for detecting an OFF state of the switch (5). The constant current is a very small current of 100 mA or less. The one-side contact point (6) or the other-side contact point (7) is connected to a voltage threshold detection means (4) that detects the OFF state of the switch (5). A control unit (8) is provided that determines the OFF state of the switch (5) on the basis of an output signal of the voltage threshold detection means (4). The control unit (8) determines that the switch (5) is in the OFF state if the applied current exceeds a predetermined threshold (Va).

Inventors:
YAMASHITA Akihiko (LTD. 4-1 Chuo 1-chome, Wako-sh, Saitama 93, 〒3510193, JP)
KOSE Tatsuya (LTD. 4-1 Chuo 1-chome, Wako-sh, Saitama 93, 〒3510193, JP)
NAKATA Chisato (LTD. 1-1 Minami-Aoyama 2-chome, Minato-k, Tokyo 56, 〒1078556, JP)
SUZUKI Shohei (LTD. 1-1 Minami-Aoyama 2-chome, Minato-k, Tokyo 56, 〒1078556, JP)
Application Number:
JP2018/002168
Publication Date:
December 06, 2018
Filing Date:
January 24, 2018
Export Citation:
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Assignee:
HONDA MOTOR CO., LTD. (1-1 Minami-Aoyama 2-chome, Minato-ku Tokyo, 56, 〒1078556, JP)
International Classes:
H01H47/00; H01H9/54
Foreign References:
JP2008059953A2008-03-13
JP2006310287A2006-11-09
JPH0696637A1994-04-08
JP2015005360A2015-01-08
JP2007273197A2007-10-18
JP2005294199A2005-10-20
Attorney, Agent or Firm:
SAKAMOTO Kiyotaka et al. (7F Lichfield-Nakano-sakaue, 35-6Chuo 1-Chome, Nakano-k, Tokyo 11, 〒1640011, JP)
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