Title:
MAGNETIC DRUM AND MAGNETIC ENCODER COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2022/237150
Kind Code:
A1
Abstract:
A magnetic drum and a magnetic encoder comprising same. The magnetic drum comprises a permanent magnet magnetic ring body (1); the permanent magnet magnetic ring body (1) comprises an inner ring wall (11) and an outer ring wall (12); the inner ring wall (11) has a single first polarity, the outer ring wall (12) has a single second polarity, and the first polarity is opposite to the second polarity; the inner ring wall (11) and the outer ring wall (12) are coaxially arranged; one of the inner ring wall (11) and the outer ring wall (12) is uniformly provided with a plurality of protrusions (13) around the axis of the permanent magnet magnetic ring body (1), and a recess (14) is formed between any two adjacent protrusions (13). Formation of a closed loop by magnetic lines of force between adjacent magnetic poles in the prior art is avoided, the strength of magnetic signals is improved, there is no non-magnetic area in the detection surface, magnetic signals received by a magnetoresistive sensor are clearer and more specific, and the quality of output signals of the magnetic encoder can be greatly improved.
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Inventors:
CHENG WENHAO (CN)
WANG YAN (CN)
CHENG MUYANG (CN)
MENG HUAIYIN (CN)
WANG XIN (CN)
WANG YAN (CN)
CHENG MUYANG (CN)
MENG HUAIYIN (CN)
WANG XIN (CN)
Application Number:
PCT/CN2021/137085
Publication Date:
November 17, 2022
Filing Date:
December 10, 2021
Export Citation:
Assignee:
SHENZHEN RADIMAG MAGNETS CO LTD (CN)
International Classes:
G01D5/12
Foreign References:
| CN113155158A | 2021-07-23 | |||
| CN215064570U | 2021-12-07 | |||
| JP2015132496A | 2015-07-23 | |||
| CN101964236A | 2011-02-02 | |||
| CN104374412A | 2015-02-25 | |||
| CN107328016A | 2017-11-07 | |||
| JP2008292275A | 2008-12-04 |
Attorney, Agent or Firm:
BEIJING XURUN LAW FIRM (CN)
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