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JPS6415608A - Rotation detector - Google Patents

Rotation detector

Info

Publication number
JPS6415608A
JPS6415608A JP17216887A JP17216887A JPS6415608A JP S6415608 A JPS6415608 A JP S6415608A JP 17216887 A JP17216887 A JP 17216887A JP 17216887 A JP17216887 A JP 17216887A JP S6415608 A JPS6415608 A JP S6415608A
Authority
JP
Japan
Prior art keywords
recording element
magnetic recording
rotating shaft
rotation detecting
small
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17216887A
Other languages
Japanese (ja)
Inventor
Seiichi Wakamatsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP17216887A priority Critical patent/JPS6415608A/en
Publication of JPS6415608A publication Critical patent/JPS6415608A/en
Pending legal-status Critical Current

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  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To reduce the recording wavelength of a magnetic recording element by a construction wherein a rotation detecting mechanism consisting of a magnetic sensor and the magnetic recording element is provided on the inner and outer wheels of a rolling bearing supporting a rotating shaft of a motor or the like. CONSTITUTION:A magnetic recording element 8 is provided on an inner wheel 1 rotating integrally with a rotating shaft 7, while a magnetic sensor 9 is provided on an outer wheel 2 oppositely to said magnetic recording element 8, and thereby a rolling bearing 5 itself, which supports the rotating shaft 7, is made to have a rotation detecting mechanism. By this construction, a gap length alphabetween the magnetic recording element 8 and the magnetic sensor 9 is prevented from undergoing the effect of runout of the rotating shaft 7, and a change in the gap length alpha becomes very small, thus enabling the increase of a resolution. Since the bearing itself operates as a rotation detecting device; besides, a moment of inertia is small, and thus the device can be made small in size.
JP17216887A 1987-07-10 1987-07-10 Rotation detector Pending JPS6415608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17216887A JPS6415608A (en) 1987-07-10 1987-07-10 Rotation detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17216887A JPS6415608A (en) 1987-07-10 1987-07-10 Rotation detector

Publications (1)

Publication Number Publication Date
JPS6415608A true JPS6415608A (en) 1989-01-19

Family

ID=15936835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17216887A Pending JPS6415608A (en) 1987-07-10 1987-07-10 Rotation detector

Country Status (1)

Country Link
JP (1) JPS6415608A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01162113A (en) * 1987-11-13 1989-06-26 Torrington Co:The Bearing with magnetic field detector
JPH02201268A (en) * 1989-01-31 1990-08-09 Nippon Seiko Kk Outer ring rotation detector for roller bearing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01162113A (en) * 1987-11-13 1989-06-26 Torrington Co:The Bearing with magnetic field detector
JPH02201268A (en) * 1989-01-31 1990-08-09 Nippon Seiko Kk Outer ring rotation detector for roller bearing

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