Title:
CONTACTLESS PRESSURE SWITCH
Document Type and Number:
WIPO Patent Application WO/2016/203711
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a high-precision, contactless pressure switch that uses magnetism, is capable of reliably detecting pressure ON/OFF even in a dirty or contaminated environment, and uses a simple structure having few components. This contactless pressure switch (100) comprises: a diaphragm (112) having a shape that displaces in accordance with the pressure of a working medium supplied from a conduit (11); a permanent magnet (121) attached to a surface on an atmospheric pressure-side being a side facing the conduit (11) for the diaphragm (112); a stopper (113) provided on the atmospheric pressure-side of the diaphragm (112) and having a housing space (113b) in which the permanent magnet (121) is housed if the diaphragm (112) is displaced; and a Hall IC (122) arranged on a surface on the atmospheric pressure-side of the stopper (113) and detecting displacement of the diaphragm (112), by detecting change in the magnetic force of the permanent magnet (121) that displaces together with the diaphragm (112).
Inventors:
HAMABE YOSHIHIRO (JP)
MIYAGO MAKOTO (JP)
MIYAGO MAKOTO (JP)
Application Number:
PCT/JP2016/002494
Publication Date:
December 22, 2016
Filing Date:
May 23, 2016
Export Citation:
Assignee:
SAGINOMIYA SEISAKUSHO INC (JP)
International Classes:
H01H35/34
Foreign References:
| JPH097477A | 1997-01-10 | |||
| JPH08327484A | 1996-12-13 | |||
| JPS6015734U | 1985-02-02 | |||
| JPH04131836U | 1992-12-04 |
Attorney, Agent or Firm:
TANI & ABE, p. c. (JP)
Patent business corporation A valley and Abe patent firm (JP)
Patent business corporation A valley and Abe patent firm (JP)
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