JPS5512946A - Automatic exposure control diaphragm device - Google Patents

Automatic exposure control diaphragm device

Info

Publication number
JPS5512946A
JPS5512946A JP8590178A JP8590178A JPS5512946A JP S5512946 A JPS5512946 A JP S5512946A JP 8590178 A JP8590178 A JP 8590178A JP 8590178 A JP8590178 A JP 8590178A JP S5512946 A JPS5512946 A JP S5512946A
Authority
JP
Japan
Prior art keywords
coils
magnets
automatic exposure
exposure control
linkage
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.)
Granted
Application number
JP8590178A
Other languages
Japanese (ja)
Other versions
JPS5952808B2 (en
Inventor
Zensaku Maeda
Terumi Ogasawara
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.)
Pentax Precision Co Ltd
Original Assignee
Asahi Seimitsu KK
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 Asahi Seimitsu KK filed Critical Asahi Seimitsu KK
Priority to JP8590178A priority Critical patent/JPS5952808B2/en
Publication of JPS5512946A publication Critical patent/JPS5512946A/en
Publication of JPS5952808B2 publication Critical patent/JPS5952808B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Diaphragms For Cameras (AREA)

Abstract

PURPOSE: To reduce the cost of a camera by displacing a quadrilateral linkage by electromagnetic responsive operation in a housing having an opening as an optical path at the center thereof to thereby conduct an automatic exposure control aperture operation with a simple construction.
CONSTITUTION: A pair of movable links 3 having coils 5, 5', respectively engaging alternatively with different polarities of magnets symmetrically within a housing having an opening as an optical path at the center thereof are connected to a pair of circular links 4, 4 mounted with the coils 5, 5' to thereby form a quadrilateral linkage. A relay member for transmitting the movement of the linkage mechanism to diaphragm blades 16 is also provided. The linkage mechanism is moved by the magnets and the electromagnetic induction produced by energizing the coils 5, 5' in the air gap magnetic field formed at the coils 5, 5' opposite to the magnets to thereby control the aperture as desired by the diaphragm blades 16.
COPYRIGHT: (C)1980,JPO&Japio
JP8590178A 1978-07-13 1978-07-13 automatic exposure control aperture device Expired JPS5952808B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8590178A JPS5952808B2 (en) 1978-07-13 1978-07-13 automatic exposure control aperture device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8590178A JPS5952808B2 (en) 1978-07-13 1978-07-13 automatic exposure control aperture device

Publications (2)

Publication Number Publication Date
JPS5512946A true JPS5512946A (en) 1980-01-29
JPS5952808B2 JPS5952808B2 (en) 1984-12-21

Family

ID=13871754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8590178A Expired JPS5952808B2 (en) 1978-07-13 1978-07-13 automatic exposure control aperture device

Country Status (1)

Country Link
JP (1) JPS5952808B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120433U (en) * 1984-01-25 1985-08-14 株式会社日立製作所 Automatic aperture mechanism
JPS60216339A (en) * 1984-11-30 1985-10-29 Nippon Seimitsu Kogyo Kk Stop device
JPS62212636A (en) * 1986-03-14 1987-09-18 Stanley Electric Co Ltd Stop controller
WO1996002018A1 (en) * 1994-07-09 1996-01-25 Martin Heinze Electromagnetically actuatable central shutter for photographic camera

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120433U (en) * 1984-01-25 1985-08-14 株式会社日立製作所 Automatic aperture mechanism
JPS60216339A (en) * 1984-11-30 1985-10-29 Nippon Seimitsu Kogyo Kk Stop device
JPS6321173B2 (en) * 1984-11-30 1988-05-06 Nippon Seimitsu Kogyo
JPS62212636A (en) * 1986-03-14 1987-09-18 Stanley Electric Co Ltd Stop controller
JPH0554091B2 (en) * 1986-03-14 1993-08-11 Stanley Electric Co Ltd
WO1996002018A1 (en) * 1994-07-09 1996-01-25 Martin Heinze Electromagnetically actuatable central shutter for photographic camera

Also Published As

Publication number Publication date
JPS5952808B2 (en) 1984-12-21

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