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公开(公告)号：EP3922955A1
公开(公告)日：2021-12-15
申请号：EP21762583.9
申请日：2021-03-09
发明人： OGATA, Kazunari , KIMURA, Shougo , FUNATSU, Kaori
摘要： The range of operating angles of a position transducer is widened, and its signal-to-noise ratio is improved. The position transducer includes a light source and a detector including at least one pair of photodiodes (PDs) disposed on a predetermined circle. The detector receives light emitted from the light source to output a signal varying depending on the areas of regions where the light is received on two PDs forming a pair. The PDs are formed on separate chips, respectively, and the chips are disposed on a substrate so that one or more pairs of PDs surround the entirety of a predetermined region and have an annular shape as a whole.
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公开(公告)号：EP2835617B1
公开(公告)日：2016-12-07
申请号：EP13849910.8
申请日：2013-10-25
CPC分类号： G01D5/3473 , G01D3/036 , G01D5/30 , G01D5/341 , G01D5/34715
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公开(公告)号：EP2835617B8
公开(公告)日：2017-02-22
申请号：EP13849910.8
申请日：2013-10-25
CPC分类号： G01D5/3473 , G01D3/036 , G01D5/30 , G01D5/341 , G01D5/34715
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公开(公告)号：EP4270744A1
公开(公告)日：2023-11-01
申请号：EP21910867.7
申请日：2021-12-22
发明人： OGATA, Kazunari , KARIYA, Takehiro , SEIMIYA, Tomohiro , DOI, Makoto , KIMURA, Shougo , TAKENAKA, Akito , KATAOKA, Katsumoto
IPC分类号： H02K15/03 , H02K1/2726
摘要： A rotor 10 rotatable around a predetermined centerline direction includes: a columnar magnet 12; and a first rotating shaft 70 with a first columnar part 71 and a cylinder-shaped first cylindrical part 72 covering a part of a first outer circumferential surface 913 of the magnet 12, wherein the first outer circumferential surface 913 of the magnet 12 and a first inner circumferential surface 721 of the first cylindrical part 72 of the first rotating shaft 70 are joined, and a first end surface 912 of the magnet 12 and a first end surface 731 of the first rotating shaft 70 are not joined.
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公开(公告)号：EP2835617A1
公开(公告)日：2015-02-11
申请号：EP13849910.8
申请日：2013-10-25
IPC分类号： G01D5/347
CPC分类号： G01D5/3473 , G01D3/036 , G01D5/30 , G01D5/341 , G01D5/34715
摘要： Provided is a position transducer which can be manufactured at low cost, improve the signal-to-noise ratio of an output obtained from a detector, and obtain a stable output even if the temperature changes. A position transducer 100 includes a butterfly-shaped reflector 7 attached to a rotating shaft 2 of a rotation restriction motor 1, an LED die 4 disposed to face a central portion of the reflection surface of the reflector 7, a diffused-light absorbing member disposed on the surfaces of a diffused light absorber 3 and a case 5, installed on the fixed side of the motor 1 so as to surround the reflector 7 with a distance from the reflector 7 at the rear of the reflector 7 as viewed from the LED die 4 and absorbing illumination light from the LED die 4 which has not illuminated the reflection surface, and detectors 11 mounted on the same printed circuit board 6 as the LED die 4 to detect an image reflected by the reflector 7.
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