Title:
STROKE SENSOR
Document Type and Number:
WIPO Patent Application WO/2021/241717
Kind Code:
A1
Abstract:
A stroke sensor is provided which has a simplified structure and which detects movement of a detection shaft with a simple method. The stroke sensor 1 detects the amount of movement S of a detection shaft 10 which moves from an origin position O following an object to be detected, wherein the stroke sensor is provided with a detection shaft 10 which is formed from a soft magnetic material and which has a large-diameter section 11, a spring 40 which at one end 41 contacts the large-diameter section 11 and which moves the detection shaft 10 back to the origin position O after said detection shaft has moved away from the origin position O, a magnet 51 which generates a magnetic field, and a magnetic detector 52 which detects said magnetic field, wherein the magnetic detector 52 is arranged between the detection shaft 10 and the magnet 51.
Inventors:
YOSHIDA RYUJI
Application Number:
PCT/JP2021/020327
Publication Date:
December 02, 2021
Filing Date:
May 28, 2021
Export Citation:
Assignee:
NIPPON SEIKI CO LTD (JP)
International Classes:
G01D5/245
Domestic Patent References:
| WO2016031261A1 | 2016-03-03 |
Foreign References:
| JP2019086504A | 2019-06-06 | |||
| US20030197502A1 | 2003-10-23 |
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