Magnetic encoder and manufacturing method thereof
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United States of America Patent
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Sep 5, 2017
Issued Date -
N/A
app pub date -
May 8, 2015
filing date -
Jun 4, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An axial-type magnetic encoder includes an annular fixing member that is fabricated by press molding, and an annular plastic magnet that is attached by injection molding to a sensor-opposed surface of the annular fixing member. When the annular fixing member includes a cylindrical part and an inward flange part extended radially inward from an end edge of the cylindrical part, the magnetic encoder has a high-form accuracy surface on the sensor-opposed surface more radially outward than a range of a diameter (d−2·r) determined by an inner diameter d of the cylindrical part and a radius r of a corner between the cylindrical part and the inward flange part. An outer diameter of the annular plastic magnet is positioned on the high-form accuracy surface.
First Claim
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International Classification(s)
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- G06F:ELECTRIC DIGITAL DATA PROCESSING
- F16C:SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OF CRANKSHAFT ME....
- G01P:MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, D....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- G01D:MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VAR....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
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