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JPS55152416A - Rotary detector - Google Patents

Rotary detector

Info

Publication number
JPS55152416A
JPS55152416A JP6120279A JP6120279A JPS55152416A JP S55152416 A JPS55152416 A JP S55152416A JP 6120279 A JP6120279 A JP 6120279A JP 6120279 A JP6120279 A JP 6120279A JP S55152416 A JPS55152416 A JP S55152416A
Authority
JP
Japan
Prior art keywords
magnets
magnetic poles
opposed
rotary
detector
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
JP6120279A
Other languages
Japanese (ja)
Inventor
Koichi Sakai
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6120279A priority Critical patent/JPS55152416A/en
Publication of JPS55152416A publication Critical patent/JPS55152416A/en
Pending legal-status Critical Current

Links

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  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE: To improve the detecting capability and reliability of a rotary detector by employing a pair of magnets having the same number of magnetic poles and arranged in an opposed and spaced relationship such that each pair of opposed magnetic poles on the magnets have opposite polarities, and a magnetism sensitive element disposed in a space between the magnets.
CONSTITUTION: A rotary body 7 fixedly mounted on a rotary shaft 6 has circular flange portions 7a, 7b. Ring type magnets 8, 9 of the same dimensions having the same number of magnetic poles are bonded to the flange portions 7a, 7b of the rotary body 7 such that each pair of opposed magnetic poles on the magnets 8, 9 have opposite polarities. A Hall IC10 is fixedly provided in an intermediate portion of a space between the magnets 8, 9. In the above structure, a line of magnetic force between two magnets 8, 9 which have a large opposed surface area is far greater than a line of magnetic force between adjacent magnetic poles on the same magnet. Moreover, a Hall element or a Hall IC reacts strongly a magnetic flux passing in the direction of the surface thereof. This is to the advantage of the sensitivity of this detector. This detector permits improving the reliability of its rotary detecting operation to a great extent even when the distance between the magnets and the magnetism sensitive element is great.
COPYRIGHT: (C)1980,JPO&Japio
JP6120279A 1979-05-17 1979-05-17 Rotary detector Pending JPS55152416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6120279A JPS55152416A (en) 1979-05-17 1979-05-17 Rotary detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6120279A JPS55152416A (en) 1979-05-17 1979-05-17 Rotary detector

Publications (1)

Publication Number Publication Date
JPS55152416A true JPS55152416A (en) 1980-11-27

Family

ID=13164356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6120279A Pending JPS55152416A (en) 1979-05-17 1979-05-17 Rotary detector

Country Status (1)

Country Link
JP (1) JPS55152416A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60195416A (en) * 1984-03-16 1985-10-03 Seiko Epson Corp Magnetic rotary encoder
JPH0344618U (en) * 1989-09-11 1991-04-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60195416A (en) * 1984-03-16 1985-10-03 Seiko Epson Corp Magnetic rotary encoder
JPH0344618U (en) * 1989-09-11 1991-04-25

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