Title:
STROKE SENSOR
Document Type and Number:
WIPO Patent Application WO/2020/045327
Kind Code:
A1
Abstract:
Provided is a stroke sensor having a simple structure, an anticorrosive sensor interior, and a reduced cost. The stroke sensor 1 tracks a body to be detected and detects a movement amount S of a detection shaft 10 moving from an origin position O, wherein the stroke sensor is characterized by: comprising the detection shaft 10, a first housing 20, a second housing 30 that supports the detection shaft 10, a spring 40 that returns the detection shaft 10 to the origin position O after the detection shaft has moved from the origin position O, a magnet 51 for causing a magnetic field to change in conjunction with the movement of the detection shaft 10, and a magnetism detecting element 52 that detects the movement amount S of the detection shaft 10 from the change of the magnetic field accompanying the movement of the detection shaft 10; and the detection shaft 10 having a receiving member 18 that contacts the spring 40, and the receiving member 18 having anode parts 18c with a larger ionization tendency than the spring 40.
Inventors:
YOSHIDA RYUJI
Application Number:
PCT/JP2019/033220
Publication Date:
March 05, 2020
Filing Date:
August 26, 2019
Export Citation:
Assignee:
NIPPON SEIKI CO LTD (JP)
International Classes:
G01B21/00; G01B7/00
Domestic Patent References:
| WO2015053151A1 | 2015-04-16 |
Foreign References:
| JP2015125103A | 2015-07-06 | |||
| JP2015059883A | 2015-03-30 | |||
| JPS59183650U | 1984-12-06 | |||
| JP2008195387A | 2008-08-28 |
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