Magnetic rotary encoder device

Details Magnetic rotary encoder device Magnetic rotary encoder device

1988-12-09

1990-04-24

Shoop, Jr., William M.

Coded data generation or conversion

Digital pattern reading type converter

Magnetic, inductive or capacitive

341 9, 324200, H03M 100, G01B 730

Patent

active

049203410

ABSTRACT:
A magnetic rotary encoder which is reduced in overall size and production cost and wherein little torsional force around an axis of a rotary shaft is applied to a bearing for the rotary shaft from a force from an object member for detection and the detection sensitivity does not fluctuate even if the rotary shaft is yielded. The rotary shaft includes a fixed shaft fixedly supported at least at one portion thereof and having an inner race of the bearing secured to an outer periphery thereof, a cylindrical member having an outer race of the bearing secured to an inner periphery thereof, and a magnetic member provided on an outer periphery of the cylindrical member and having magnetic poles formed thereon. A magnetic sensor for detecting a magnetic flux from the magnetic member is supported on the fixed shaft by means of a mounting plate, and a detecting member is mounted in sliding contact with the cylindrical member and rotates, when it is rotated, the magnetic member around the axis of the rotary shaft. A force from the detecting member is received by the single bearing on the fixed shaft.

REFERENCES:
patent: 4274053 (1981-06-01), Ito et al.
patent: 4533830 (1985-08-01), Beauprey
patent: 4774464 (1988-09-01), Kubota et al.
patent: 4780703 (1988-10-01), Ishida et al.

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